Relevant bibliographies by topics / TDMA Techniques

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  2. Dissertations / Theses
  3. Books
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Academic literature on the topic 'TDMA Techniques'

Author: Grafiati
Published: 3 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "TDMA Techniques"

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LIM, ALVIN, and KUI MOK. "PERFORMANCE EVALUATION OF ADAPTIVE MEDIA ACCESS CONTROL PROTOCOLS FOR PERVASIVE WIRELESS NETWORKS." Journal of Interconnection Networks 03, no. 03n04 (2002): 253–72. http://dx.doi.org/10.1142/s0219265902000665.

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As pervasive and high-density wireless networks become increasingly common, it is critical to address the problems of intermittent disconnection, high error rate and collision that cause degradation in the performance of wireless media access control protocols, such as slotted ALOHA Time Division Multiple Access (slotted ALOHA/TDMA) and Direct Sequence Code Division Multiple Access (DS/CDMA). We propose adaptive techniques for improving performance of media access protocols through awareness of the mobile communication environment. These techniques involve detection of intermittent disconnection, high error rates, and collisions. Upon detection and notification of these conditions by snooping devices, the media access control layer adapts its operation and synchronization accordingly to reduce delay and loss of bandwidth. Results from our simulation studies show that adaptive TDMA improves performance by as much as 12 times over basic TDMA and adaptive CDMA improves by as much as 4 times over basic CDMA in wireless network with high density cells. Overall, adaptive CDMA still performs better than adaptive TDMA by about 4 times.
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Miriampally, Venkata Raghavendra, G. Subba Rao, and V. Sudheer Raja. "Determination of Number of Channels in Multiple Access Techniques for Wireless Communications." International Journal of Informatics and Communication Technology (IJ-ICT) 4, no. 1 (2015): 1. http://dx.doi.org/10.11591/ijict.v4i1.pp1-6.

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<p>In wireless communications system, it is desirable to allow the subscriber to send simultaneously information to the base station while receiving information from base station. Multiple access techniques are used to allow many mobile users to share simultaneously a finite amount of radio spectrum. Frequency division multiple access (FDMA), time division multiple access(TDMA), and code division multiple access (CDMA) are the three major access techniques used to share the available bandwidth in a wireless communication system. In this paper we calculated the number of channels required for FDMA & TDMA techniques depending on various factors such as spectrum, channel band width etc.</p>
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Sourour, E. "Time slot assignment techniques for TDMA digital cellular systems." IEEE Transactions on Vehicular Technology 43, no. 1 (1994): 121–27. http://dx.doi.org/10.1109/25.282272.

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Nosheen, Irum, Shoab A. Khan, and Umar Ali. "A Cross-Layer Design for a Multihop, Self-Healing, and Self-Forming Tactical Network." Wireless Communications and Mobile Computing 2019 (April 9, 2019): 1–16. http://dx.doi.org/10.1155/2019/1523906.

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In mission and time critical applications, bandwidth and delay optimizations are the key goals of communication systems. This paper presents a cross-layer framework design that reduces the call setup time, provides collision-free communication, and reuses the empty slots of Time Division Multiple Access (TDMA) protocol which otherwise causes low throughput and large delay. As number of communicating nodes in tactical networks is small as compared to commercial mobile ad hoc networks (MANETs), classical TDMA will yield huge number of empty slots and any Carrier Sense Multiple Access/Collision Detection (CSMA/CD) technique may cause more delay in some critical scenarios. Proposed methodology gives a Cross-Layer Architecture for Network (NET) Layer and Medium Access Control (MAC) Layer. Our design provides bandwidth efficient, collision-free communication to Software-Defined Radios (SDRs) in self-forming and self-healing tactical networks with low call setup time and multihop routing. For this purpose TDMA as MAC layer protocol and Ad Hoc On Demand Distance Vector (AODV) as Network Layer Routing Protocol are used. Our slot allocation (SA) algorithm, Cross-Layer TDMA (CL-TDMA), consists of control phase where AODV control packets are exchanged and data transfer phase where transmission of data and voice occurs. All active radios in vicinity gather information about communicating nodes based on the exchange of control packets by SDRs. Our algorithm then uses this information to help all active SDRs find slot(s) that will be used for collision-free transmission. A number of experiments are performed to establish improved performance of the proposed technique compared to other established techniques and protocols.
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HERRERO, JUAN CARLOS. "CDMA & TDMA BASED NEURAL NETS." International Journal of Neural Systems 11, no. 03 (2001): 237–46. http://dx.doi.org/10.1142/s0129065701000679.

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CDMA and TDMA telecommunication techniques were established long time ago, but they have acquired a renewed presence due to the rapidly increasing mobile phones demand. In this paper, we are going to see they are suitable for neural nets, if we leave the concept "connection" between processing units and we adopt the concept "messages" exchanged between them. This may open the door to neural nets with a higher number of processing units and flexible configuration.
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., Pallvi, Sunil Kumar Gupta, and Rajeev Kumar Bedi. "Reinforcement Learning Based Clock Synchronization in WBAN." Asian Journal of Computer Science and Technology 7, no. 2 (2018): 34–39. http://dx.doi.org/10.51983/ajcst-2018.7.2.1885.

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Wireless Body Area Network (WBAN) is an application of wireless sensor network (WSN). WBAN therefore forms a comprehensive collection of devices that are not only capable of providing continuous information about the health status of a person but also offers helpful details about the activities and environment of the person. In this paper, we have evaluated TDMA based MAC protocol performance through several metrics and TDMA approach is used to avoid packet collision which leads to higher packet loss rate. Reinforcement Based Clock synchronization is the solution of problem like packet collision. After clocks of WBAN sensor nodes are synchronized, data can be transferred between sensor nodes and sink efficiently and rapidly. Reinforcement learning iteratively optimizes the clock synchronization technique. Experimental results indicate that the proposed algorithm is more efficient than existing techniques.
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Mengesha, Befekadu, Pablo Torres-Ferrera, and Roberto Gaudino. "Analysis of 5G New Radio Uplink Signals on an Analogue-RoF System Based on DSP-Assisted Channel Aggregation." Applied Sciences 9, no. 1 (2018): 47. http://dx.doi.org/10.3390/app9010047.

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The 3rd Generation Partnership Project (3GPP) is in the process of developing 5th generation (5G) radio access technology, the so-called new radio (NR). The aim is to achieve the performance requirements forIMT-2020 radio interface technology. In this paper, we focus on the analysis of the transmission of 5G NR uplink physical channels, such as physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH), dedicated for data and control channels, respectively, as specified in the 3GPP standard, using digital signal processing (DSP)-assisted frequency division multiple access (FDMA) and time division multiple access (TDMA) channel aggregation techniques on an analogue radio-over-fiber (A-RoF) architecture. We verified that there is ~34% spectral efficiency gain and lower error vector magnitude (EVM) achieved using the TDMA technique.
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Jong Il Park, S. B. Wicker, and H. L. Owen. "Trellis-based soft-output adaptive equalization techniques for TDMA cellular systems." IEEE Transactions on Vehicular Technology 49, no. 1 (2000): 83–94. http://dx.doi.org/10.1109/25.820701.

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Hu, Yunkai, Weiyi Bian, Xuan Xuan, and Ruike Wu. "The development of multicarrier transmission and multiple access methods." Theoretical and Natural Science 34, no. 1 (2024): 351–59. http://dx.doi.org/10.54254/2753-8818/34/20240754.

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This paper presents an overview of development of multicarrier transmission and multiple access methods over the past decades. Focus shifts towards optimizing communication methods for a more expeditious, reliable, and efficient system. Several communicational techniques, including TDMA, CDMA, OFDMA, and GFDMA are discussed. With the growing trend of artificial intelligence, it can be predicted that artificial intelligence will be of great use in improving multicarrier transmission and multiple access methods.
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Iradier, Gil Eneko, Aritz Abuin, Alvarez Rufino Reydel Cabrera, et al. "Advanced NOMA-based RRM schemes for broadcasting in 5G mmWave frequency bands." IEEE Transactions on Broadcasting 68, no. 1 (2021): 143–55. https://doi.org/10.1109/TBC.2021.3128049.

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A relevant solution for the high demand for new multimedia applications and services is millimeter wave (mmWave) frequency band in 5G. However, in order to face the technological challenges of the present and those that will appear in the short-term future, it is necessary to improve the spectral efficiency of 5G systems. In particular, the Radio Resource Management (RRM) module is considered an essential component. Nevertheless, resource allocation techniques that combine orthogonal multiplexing (OMA) schemes, such as Time Division Multiple Access (TDMA), with Non-Orthogonal Multiple Access (NOMA) techniques have not been studied in-depth. Therefore, this article designs and evaluates different RRM models that combine TDMA with NOMA for innovative applications in the 5G mmWave frequency bands. To this end, the advantages and challenges associated with mmWave frequency bands and potential future applications are introduced. An innovative use case has been designed to test the RRM models. The use case is based on the on-demand distribution of multimedia content in high-density environments, such as museum halls. The on-demand content aims at offering Augmented Reality (AR) services to unicast users in order to provide personalized services. The models have been evaluated in terms of throughput, capacity, and availability. According to the results, the combined RRM techniques offer up to 50% more capacity than the single multiplexing technology models and can provide video-on-demand service to practically the entire cell.
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Dissertations / Theses on the topic "TDMA Techniques"

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Meyer, Nicholas Karl. "Water uptake of aerosols with a focus on seeded aerosols and instrumentation techniques." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/26361/1/Nicholas_Meyer_Thesis.pdf.

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This thesis focuses on the volatile and hygroscopic properties of mixed aerosol species. In particular, the influence organic species of varying solubility have upon seed aerosols. Aerosol studies were conducted at the Paul Scherrer Institut Laboratory for Atmospheric Chemistry (PSI-LAC, Villigen, Switzerland) and at the Queensland University of Technology International Laboratory for Air Quality and Health (QUT-ILAQH, Brisbane, Australia). The primary measurement tool employed in this program was the Volatilisation and Hygroscopicity Tandem Differential Mobility Analyser (VHTDMA - Johnson et al. 2004). This system was initially developed at QUT within the ILAQH and was completely re-developed as part of this project (see Section 1.4 for a description of this process). The new VHTDMA was deployed to the PSI-LAC where an analysis of the volatile and hygroscopic properties of ammonium sulphate seeds coated with organic species formed from the photo-oxidation of á-pinene was conducted. This investigation was driven by a desire to understand the influence of atmospherically prevalent organics upon water uptake by material with cloud forming capabilities. Of particular note from this campaign were observed influences of partially soluble organic coatings upon inorganic ammonium sulphate seeds above and below their deliquescence relative humidity (DRH). Above the DRH of the seed increasing the volume fraction of the organic component was shown to reduce the water uptake of the mixed particle. Below the DRH the organic was shown to activate the water uptake of the seed. This was the first time this effect had been observed for á-pinene derived SOA. In contrast with the simulated aerosols generated at the PSI-LAC a case study of the volatile and hygroscopic properties of diesel emissions was undertaken. During this stage of the project ternary nucleation was shown, for the first time, to be one of the processes involved in formation of diesel particulate matter. Furthermore, these particles were shown to be coated with a volatile hydrophobic material which prevented the water uptake of the highly hygroscopic material below. This result was a first and indicated that previous studies into the hygroscopicity of diesel emission had erroneously reported the particles to be hydrophobic. Both of these results contradict the previously upheld Zdanovksii-Stokes-Robinson (ZSR) additive rule for water uptake by mixed species. This is an important contribution as it adds to the weight of evidence that limits the validity of this rule.
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Meyer, Nicholas Karl. "Water uptake of aerosols with a focus on seeded aerosols and instrumentation techniques." Queensland University of Technology, 2008. http://eprints.qut.edu.au/26361/.

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This thesis focuses on the volatile and hygroscopic properties of mixed aerosol species. In particular, the influence organic species of varying solubility have upon seed aerosols. Aerosol studies were conducted at the Paul Scherrer Institut Laboratory for Atmospheric Chemistry (PSI-LAC, Villigen, Switzerland) and at the Queensland University of Technology International Laboratory for Air Quality and Health (QUT-ILAQH, Brisbane, Australia). The primary measurement tool employed in this program was the Volatilisation and Hygroscopicity Tandem Differential Mobility Analyser (VHTDMA - Johnson et al. 2004). This system was initially developed at QUT within the ILAQH and was completely re-developed as part of this project (see Section 1.4 for a description of this process). The new VHTDMA was deployed to the PSI-LAC where an analysis of the volatile and hygroscopic properties of ammonium sulphate seeds coated with organic species formed from the photo-oxidation of á-pinene was conducted. This investigation was driven by a desire to understand the influence of atmospherically prevalent organics upon water uptake by material with cloud forming capabilities. Of particular note from this campaign were observed influences of partially soluble organic coatings upon inorganic ammonium sulphate seeds above and below their deliquescence relative humidity (DRH). Above the DRH of the seed increasing the volume fraction of the organic component was shown to reduce the water uptake of the mixed particle. Below the DRH the organic was shown to activate the water uptake of the seed. This was the first time this effect had been observed for á-pinene derived SOA. In contrast with the simulated aerosols generated at the PSI-LAC a case study of the volatile and hygroscopic properties of diesel emissions was undertaken. During this stage of the project ternary nucleation was shown, for the first time, to be one of the processes involved in formation of diesel particulate matter. Furthermore, these particles were shown to be coated with a volatile hydrophobic material which prevented the water uptake of the highly hygroscopic material below. This result was a first and indicated that previous studies into the hygroscopicity of diesel emission had erroneously reported the particles to be hydrophobic. Both of these results contradict the previously upheld Zdanovksii-Stokes-Robinson (ZSR) additive rule for water uptake by mixed species. This is an important contribution as it adds to the weight of evidence that limits the validity of this rule.
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Johnson, Graham Richard. "The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16117/1/Graham_Johnson_Thesis.pdf.

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Marine aerosols have attracted increasing attention over the past 15 years because of their potential significance for global climate modelling. The size distribution of these aerosols extends from super-micrometer sea salt mode particles down through 150 nm accumulation mode particles, 40 nm Aitken mode particles and nucleation mode particles which extend from 25 nm right down to clusters of a few molecules. The process by which the submicrometer modes form and grow and their composition have remained topics of debate throughout this time in large part because of the difficulties associated with determining their composition and relating it to proposed models of the formation process. The work compared the modality of marine aerosol influencing the South-east-Queensland region with that of other environmental aerosols in the region. The aerosol was found to be consistent with marine aerosols observed elsewhere with concentrations below 1000 cm-3 and frequently exhibiting the distinct bimodal structure associated with cloud processing, consisting of an Aitken mode at approximately 40 nm, an accumulation mode in the range 100-200 nm and a coarse mode attributed to sea salt between 600 and 1200 nm. This work included the development of two new techniques for aerosol research. The first technique measures aerosol density using a combination of aerosol size distribution and gravimetric mass concentration measurements. This technique was used to measure the density of a number of submicrometer aerosols including laboratory generated NaCl aerosol and ambient aerosol. The densities for the laboratory generated aerosols were found to be similar to those for the bulk materials used to produce them. The technique, extended to super-micrometer particle size range may find application in ambient aerosol research where it could be used to discriminate between periods when the aerosol is dominated by NaCl and periods when the density is more representative of crustal material or sulfates. The technique may also prove useful in laboratory or industrial settings for investigating particle density or in case where the composition is known, morphology and porosity. The second technique developed, integrates the existing physicochemical techniques of volatilisation and hygroscopic growth analysis to investigate particle composition in terms of both the volatilisation temperatures of the chemical constituents and their contribution to particle hygroscopic behaviour. The resulting volatilisation and humidification tandem differential mobility analyser or VH-TDMA, has proven to be a valuable research tool which is being used in ongoing research. Findings of investigations relating the composition of the submicrometer marine aerosol modes to candidate models for their formation are presented. Sea salt was not found in the numerically dominant particle type in coastal nucleation mode or marine Aitken and accumulation modes examined on the Southeast Queensland coast during periods where back trajectories indicated marine origin. The work suggests that all three submicrometer modes contain the same four volatile chemical species and an insoluble non-volatile residue. The volatility and hygroscopic behaviours of the particles are consistent with a composition consisting of a core composed of sulfuric acid, ammonium sulfate and an iodine oxide coated with a volatile organic compound. The volume fraction of the sulfuric acid like species in the particles shows a strong dependence on particle size.
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Johnson, Graham Richard. "The Formation and Growth of Marine Aerosols and the Development of New Techniques for their In-situ Analysis." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16117/.

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Marine aerosols have attracted increasing attention over the past 15 years because of their potential significance for global climate modelling. The size distribution of these aerosols extends from super-micrometer sea salt mode particles down through 150 nm accumulation mode particles, 40 nm Aitken mode particles and nucleation mode particles which extend from 25 nm right down to clusters of a few molecules. The process by which the submicrometer modes form and grow and their composition have remained topics of debate throughout this time in large part because of the difficulties associated with determining their composition and relating it to proposed models of the formation process. The work compared the modality of marine aerosol influencing the South-east-Queensland region with that of other environmental aerosols in the region. The aerosol was found to be consistent with marine aerosols observed elsewhere with concentrations below 1000 cm-3 and frequently exhibiting the distinct bimodal structure associated with cloud processing, consisting of an Aitken mode at approximately 40 nm, an accumulation mode in the range 100-200 nm and a coarse mode attributed to sea salt between 600 and 1200 nm. This work included the development of two new techniques for aerosol research. The first technique measures aerosol density using a combination of aerosol size distribution and gravimetric mass concentration measurements. This technique was used to measure the density of a number of submicrometer aerosols including laboratory generated NaCl aerosol and ambient aerosol. The densities for the laboratory generated aerosols were found to be similar to those for the bulk materials used to produce them. The technique, extended to super-micrometer particle size range may find application in ambient aerosol research where it could be used to discriminate between periods when the aerosol is dominated by NaCl and periods when the density is more representative of crustal material or sulfates. The technique may also prove useful in laboratory or industrial settings for investigating particle density or in case where the composition is known, morphology and porosity. The second technique developed, integrates the existing physicochemical techniques of volatilisation and hygroscopic growth analysis to investigate particle composition in terms of both the volatilisation temperatures of the chemical constituents and their contribution to particle hygroscopic behaviour. The resulting volatilisation and humidification tandem differential mobility analyser or VH-TDMA, has proven to be a valuable research tool which is being used in ongoing research. Findings of investigations relating the composition of the submicrometer marine aerosol modes to candidate models for their formation are presented. Sea salt was not found in the numerically dominant particle type in coastal nucleation mode or marine Aitken and accumulation modes examined on the Southeast Queensland coast during periods where back trajectories indicated marine origin. The work suggests that all three submicrometer modes contain the same four volatile chemical species and an insoluble non-volatile residue. The volatility and hygroscopic behaviours of the particles are consistent with a composition consisting of a core composed of sulfuric acid, ammonium sulfate and an iodine oxide coated with a volatile organic compound. The volume fraction of the sulfuric acid like species in the particles shows a strong dependence on particle size.
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Li, Binghao Surveying &amp Spatial Information Systems Faculty of Engineering UNSW. "Terrestial mobile user positioning using TDOA and fingerprinting techniques." Awarded by:University of New South Wales. School of Surveying and Spatial Information Systems, 2006. http://handle.unsw.edu.au/1959.4/25507.

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Specialists are expecting the knowledge of location will trigger yet another revolution in mobile services. Location-base services (LBS) have attracted many researchers and enterprises and one of the key aspects of LBS is positioning technology. Considering a wider and more complex field - ubiquitous computing, location is the fundamental element. This work focuses on some aspects of the new techniques of terrestrial positioning systems. Wireless LAN is one of the most popular systems used for positioning for indoor environments and public places. We have investigated the trilateration and fingerprinting approaches and the results showed the advantages of fingerprinting. A novel method to generate the fingerprints database based on Universal Kriging (UK) was developed, which can not only significantly decrease the training time, but also increase the accuracy of estimates. In mobile phone positioning systems, most techniques suffer from the non-line-of-sight (NLOS) propagation. We investigated the specifics of NLOS error, and proposed a method to mitigate the errors. Furthermore, a new algorithm named WSMM (wireless signal map matching) was discussed. Simulations and experiments verified the idea, and the accuracy of positioning can be improved greatly. Since fingerprinting technique can utilize rather than suffer from the NLOS propagation, it was also applied in mobile phone positioning system. Experiments showed both the deterministic approach and probabilistic approach can provide better results comparing with other techniques in suburban area. To achieve a robust positioning system and provide more useful information of the user, multisensor combination and data fusion are necessary. As the first step of future research, a mulitsensor synchronization system was developed. This system can promisingly achieve synchronization with error less than 0.4 ms, which is suitable for most land applications. Hence the main findings of this thesis are: (1) a novel method of yielding fingerprint database for both wireless LAN (WLAN) and mobile phone systems when using the fingerprinting technique for positioning; (2) a database method to mitigate NLOS error for mobile phone positioning systems; (3) a low cost synchronization system for integration of multiple sensors.
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Aatique, Muhammad. "Evaluation of TDOA Techniques for Position Location in CDMA Systems." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/9558.

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The Federal Communications Commission (FCC) has adopted regulations requiring wireless communication service providers to provide position location (PL) information for a user requesting E-911 service. The Time Difference of Arrival (TDOA) technique is one of the most promising position location techniques for cellular-type wireless communication systems. The IS-95 Code Division Multiple Access (CDMA) system is a popular choice for the companies deploying new cellular and PCS systems in North America. Hence, the feasibility of TDOA techniques in CDMA systems is an important issue for position location in the wireless systems of the future. This thesis analyzes the performance of TDOA techniques in the CDMA systems. A comparison and assessment of different algorithms for finding the time difference estimates and for solving the hyperbolic equations generated by those estimates has been made. This research also considers a measure of accuracy for TDOA position location method which is shown to be more suitable for CDMA systems and more closely matches to the FCC requirements. Among the other contributions is a proposed method to perform cross-correlations to identify only the desired user's TDOA in a multiuser environment. This thesis also evaluates the feasibility and accuracy of TDOA techniques under varying system conditions that might be encountered in real situations. This includes varying conditions of Additive White Gaussian Noise (AWGN), Multiple Access Interference (MAI), power control and loading. The effect of the mobile position and of different arrangement of base stations on TDOA accuracy is also studied. Performance comparison in AWGN and Rayleigh fading channels is made. The feasibility of using increased power levels for the 911 user in combination with interference cancellation is also studied. The effect of using a single stage of parallel interference cancellation at neighboring cell sites has also been explored. Non-ideal situations such as imperfect power control in CDMA operation has also been investigated in the context of position location. This thesis also suggests amethod to correct TDOA estimation errors in CDMA. It is shown that this improvement can give greatly improved performance even under worst-case situations. Performance comparison of results with and without that modification has also been made under various conditions.<br>Master of Science
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Tas, Volkan. "Optimal Use of TDOA Geo-Location Techniques Within the Mountainous Terrain of Turkey." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17467.

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Emitter location finding enables important functionality for both military and civilian applications. GPS is the most recognized and widely used positioning system, but it is a receiver location system that functions in a markedly different manner from emitter location. Many geo-location techniques predate and have been proposed as an alternative to GPS. Some of the more commonly used and exploited of these techniques are angle of arrival, time of arrival, frequency difference of arrival, and time difference of arrival (TDOA). This thesis is primarily focused on TDOA. These techniques are important for military applications. Location finding is a part of electronic warfare support, which is one of the main braches of electronic warfare. Because these techniques are platform independent, they can be used with any system or platform, such as UAVs, manned aircraft, ground locations, etc. In Turkey it is vitally important for the army conducting search and destroy operations against terrorists to locate emitters associated with these terrorists. The simulation developed in this thesis provides a better understanding of the accuracy of TDOA based geolocation systems. Combinations of receivers and techniques are explored to determine the optimal solutions. The factors of noise and distance have a linear effect on accuracy. The best combination of receivers is determined with consideration to using a combination of fixed and airborne platforms. The best distribution for highest accuracy is determined and discussed.
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Fiammengo, Martina. "Sleep mode scheduling technique for energy saving in TDM-PONs." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31062.

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Nowadays energy efficiency of telecommunication networks is receiving more attention than in the past for natural reasons. The situation is critical especially for access networks that typically include many end-user devices that consume a lot of energy. This thesis proposes a novel sleep mode technique for TDM-PONs that turns off the ONUs  (placed at the customer premises) when certain traffic conditions are verified. The objective is to achieve an improved energy efficiency without impacting too much the Quality of Service perceived by end-users. The whole operation is managed at the OLT (placed at the provider central office) and the length of the sleep time periods is computed employing a statistical method. An approximated version has been implemented in hardware for proof of concept. The obtained results show that the proposed sleep mode technique has good performances for  some test cases while it should be avoided for others.
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Thevenin, Mathieu. "Conception et validation d'un processeur programmable de traitement du signal à faible consommation et à faible empreinte silicium : application à la vidéo HD sur téléphone mobile." Phd thesis, Université de Bourgogne, 2009. http://tel.archives-ouvertes.fr/tel-00504704.

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Les capteurs CMOS sont de plus en plus présents dans les produits de grande consommation comme les téléphones portables. Les images issues de ces capteurs nécessitent divers traitements numériques avant d'être affichées. Aujourd'hui, seuls des composants dédiés sont utilisés pour maintenir un niveau de consom- mation électrique faible. Toutefois leur flexibilité est fortement limitée et elle ne permet pas l'intégration de nouveaux algorithmes de traitement d'image. Ce manuscrit présente la conception et la validation de l'archi- tecture de calcul eISP entièrement programmable et originale capable de supporter la vidéo HD 1080p qui sera intégrée dans les futures générations de téléphones portables.
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Ruggieri, Vito Giovanni. "Analyse morphologique des bioprothèses valvulaires aortiques dégénérées par segmentation d’images TDM." Rennes 1, 2012. https://ecm.univ-rennes1.fr/nuxeo/site/esupversions/2be5652f-691e-4682-a0a0-e8db55bb95d9.

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Le but de cette étude est d’évaluer la faisabilité de l’analyse tomodensitométrique 3D des bioprothèses aortiques pour faciliter leur évaluation morphologique durant le suivi et d’aider à la sélection des cas et à l'amélioration de la planification d’une procédure valve-in-valve. Le principal défi concernait le rehaussement des feuillets valvulaires, en raison d’images très bruitées. Un scanner synchronisé était réalisé chez des patients porteurs d’une bioprotèse aortique dégénérée avant réintervention (images in-vivo). Différentes méthodes pour la réduction du bruit étaient proposées. La reconstruction tridimensionnelle des bioprothèses était réalisée en utilisant des méthodes de segmentation de régions par "sticks". Après ré-opération ces méthodes étaient appliquées aux images scanner des bioprothèses explantées (images ex-vivo) et utilisées comme référence. La réduction du bruit obtenue par le filtre stick modifié montrait de meilleurs résultats, en rapport signal/bruit, en comparaison aux filtres de diffusion anisotrope. Toutes les méthodes de segmentation ont permis une reconstruction 3D des feuillets. L’analyse qualitative a montré une bonne concordance entre les images obtenues in-vivo et les altérations des bioprothèses. Les résultats des différentes méthodes étaient comparés par critères volumétriques et discutés. Les images scanner des bioprothèses aortiques nécessitent un traitement de débruitage et de réduction des artéfacts de façon à permettre le rehaussement des feuillets prothétiques. La méthode de segmentation de régions par sticks semble représenter une approche pertinente pour caractériser morphologiquement la dégénérescence des bioprothèses<br>The aim of the study was to assess the feasibility of CT based 3D analysis of degenerated aortic bioprostheses to make easier their morphological assessment. This could be helpful during regular follow-up and for case selection, improved planning and mapping of valve-in-valve procedure. The challenge was represented by leaflets enhancement because of highly noised CT images. Contrast-enhanced ECG-gated CT scan was performed in patients with degenerated aortic bioprostheses before reoperation (in-vivo images). Different methods for noise reduction were tested and proposed. 3D reconstruction of bioprostheses components was achieved using stick based region segmentation methods. After reoperation, segmentation methods were applied to CT images of the explanted prostheses (ex-vivo images). Noise reduction obtained by improved stick filter showed best results in terms of signal to noise ratio comparing to anisotropic diffusion filters. All segmentation methods applied to in-vivo images allowed 3D bioprosthetic leaflets reconstruction. Explanted bioprostheses CT images were also processed and used as reference. Qualitative analysis revealed a good concordance between the in-vivo images and the bioprostheses alterations. Results from different methods were compared by means of volumetric criteria and discussed. ECG-gated CT images of aortic bioprostheses need a preprocessing to reduce noise and artifacts in order to enhance prosthetic leaflets. Stick region based segmentation seems to provide an interesting approach for the morphological characterization of degenerated bioprostheses
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Books on the topic "TDMA Techniques"

1

United States. National Aeronautics and Space Administration., ed. A burst compression and expansion technique for variable-rate users in satellite-switched TDMA networks. National Aeronautics and Space Administration, 1990.

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Majzoub, Mohammad Abdul Hadi, and Mohammad Kinan Al Hares. Tdma and Fdma Techniques. GRIN Verlag GmbH, 2015.

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Lefort, Lucie. Tda-H: Outils et Techniques P�dagogiques Pour G�rer le TDA/H Au Quotidien. Independently Published, 2019.

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Daniels, Nicolas J. *. Performance analysis of a voice/data TDM link using state reduction techniques. 1989.

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Hébert, Ariane. TDA/H - La boîte à outils - Stratégies et techniques pour gérer le TDAH. DE MORTAGNE, 2021.

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Hébert, Ariane. TDA/H - La boîte à outils - Stratégies et techniques pour gérer le TDAH. DE MORTAGNE, 2021.

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de lʼEtoile, Shannon. Processes of music therapy. Edited by Susan Hallam, Ian Cross, and Michael Thaut. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199298457.013.0046.

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This article reviews behavioural, psychoanalytic, and humanistic music therapy. It then discusses Neurologic Music Therapy (NMT), the Rational–Scientific Mediating Model (R–SMM), and the Transformational Design Model (TDM). NMT techniques address cognitive, sensory, and motor dysfunction resulting from disease of the human nervous system. NMT theory is founded in a neuroscience model of music perception, known as the R–SMM, which explains how music functions as a mediating stimulus. The R–SMM provides clear guidelines for conducting research regarding music's therapeutic effects. A supplemental model is needed, however, to assist the clinician in translating research findings from the R–SMM into everyday practice. TDM meets this need by providing a systematic, step-by-step approach to designing, implementing, and evaluating clinical interventions.
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Book chapters on the topic "TDMA Techniques"

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Faruque, Saleh. "Time Division Multiple Access (TDMA)." In Radio Frequency Multiple Access Techniques Made Easy. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91651-4_4.

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Gouable, Rodolphe Le, and Maryline Helard. "Comparison of MC-CDMA and COFDM/TDMA Techniques Taking into Account the System Load for Wireless Indoor Communications." In Multi-Carrier Spread-Spectrum & Related Topics. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_17.

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Jovic, Branislav. "Chaos Based Multi-user TDM Communication System." In Synchronization Techniques for Chaotic Communication Systems. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21849-1_8.

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Jovic, Branislav. "Chaotic Synchronization Based Multi-user TDM Communication Systems." In Synchronization Techniques for Chaotic Communication Systems. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21849-1_9.

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Liu, Xu. "Research on Signal Design Method of Pseudolite “Near-Far Effect” Based on TDMA Technique." In China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume I. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4588-2_36.

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"Multiple Access Techniques: FDMA, TDMA, AND CDMA." In RF Measurements for Cellular Phones and Wireless Data Systems. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470378014.ch30.

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"Multiple access techniques: FDMA, TDMA, CDMA; system capacity comparisons." In Mobile Wireless Communications. Cambridge University Press, 2004. http://dx.doi.org/10.1017/cbo9780511811333.007.

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Palaniswamy, Swathypriyadharsini, Chitradevi T. N., Prabha Devi D., and K. Premalatha. "Ensemble-Based Machine Learning Techniques for Adaptive Wireless Sensor Networks." In Advances in Computer and Electrical Engineering. IGI Global, 2025. https://doi.org/10.4018/979-8-3693-7600-3.ch015.

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Wireless sensor networks (WSN) have gained popularity in next-generation IoT connectivity due to their sustainability and low maintenance. However, the dynamic nature of energy sources and environmental conditions presents challenges to the security and reliability of WSNs, particularly in mitigating various network attacks. Machine learning offers solutions to these challenges by enabling adaptive real-time behaviour. This chapter addresses the challenges of WSN security by applying ML techniques to a multi-class WSN dataset attacks such as normal, flooding, TDMA, grayhole, and blackhole. SMOTE is applied to manage class imbalance, and an ensemble framework is proposed with classifiers such as logistic regression, random forest, gradient boost, xtreme gradient boost, decision tree, LGBM, SVM, and CatBoost were applied to predict attacks in WSN-DS dataset. The models are rigorously tested and evaluated using accuracy, precision, recall, and F1-score. Gradient boost, xtreme gradient boost, and catboost classifiers outperform all other classifiers by achieving 98% of accuracy.
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O., Olusanya Olamide, and Ogunleye Abiodun A. "Comparison of TDMA (GSM) and W- CDMA (3G) Systems Based on their Modulation Techniques." In Current Approaches in Engineering Research and Technology Vol. 4. B P International, 2024. http://dx.doi.org/10.9734/bpi/caert/v4/8631a.

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Ahmad, Awais, Anand Paul, Sohail Jabbar, and Seungmin Rho. "Energy Efficient Congestion Control in Wireless Sensor Networks." In Sensor Technology. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2454-1.ch037.

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Avoiding from congestion and provision of reliable communication characterising the low energy consumption and high data rate is one of the momentous challenges at Media Access Control (MAC) layer. This become more difficult to achieve when there is energy constraint mixed with mobility of nodes. Same issue is addressed in this underlying paper. Here we have proposed a Time-Sharing Energy Efficient Congestion Control (TSEEC) technique for Mobile Wireless Sensor Networks. Time Division Multiple Access Protocol (TDMA) and Statistical Time Division Multiple Access Protocol (STDMA) are major constituents of this technique. These helps in conserving the energy by controlling the sleeping, waking up and listening states of sensor nodes. Load Based Allocation and Time Allocation Leister techniques further helps in conserving the network energy minimizing the network congestion. First mentioned technique is designed on the basis of STDMA Protocol and uses the sensor node information to dynamically assign the time slots while later said technique is does the job of mobility management of sensor node. This Time Allocation Leister techniques further comprises of Extricated Time Allocation (ETA), Shift Back Time Allocation (SBTA), and eScaped Time Allocation (STA) sub techniques for managing the joing and leaving of nodes to cluster and redundant\absence of data for communication respectively. To control the movement of mobile sensor nodes, we have also introduced mobility pattern as part of TSEEC that helps in making the protocol adaptive to traffic environment and to mobility as well. A comparitive analysis of proposed mechanism with SMAC is performed in NS2 along with mathematical anslysis by considering energy consumption, and packet deliver ratio as performance evaluation parameters. The results for the former outperforms to that of later. Moreover, comparative analysis of the proposed TSEEC with other MAC protocols is also presented.
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Conference papers on the topic "TDMA Techniques"

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Nwazor, Nkolika O., Justice C. Erowele, Remigius O. Okeke, Ekene S. Mbonu, and Otelemate M. Horsfall. "Energy Optimization of Wireless Body Area Network(WBAN) Using TDMA Duty Cycling and Thermal Energy Harvesting." In Africa International Conference on Clean Energy and Energy Storage. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-1wcg7x.

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Energy harvesting is an effective technique for optimizing Wireless Body Area Network (WBAN) devices used for continuous healthcare services delivery. Despite the growing popularity of WBANs in recent years due to their potential to transform healthcare, energy consumption remains a critical issue. This is due to several factors such as the limited capacity of batteries in smaller sensor nodes, the continuous operation that drains batteries and renders the nodes inoperable, and the impracticality of replacing batteries in situations where the sensors are implanted in the human body and would require surgical procedures to remove them. Thus, the need for research into scavenging, harvesting and utilizing available energy sources. This work proposed energy optimization of WBAN using Time Division Multiple Access (TDMA) duty cycling and thermal energy harvesting. The proposed model aims to enhance energy efficiency in a WBAN using TDMA and Thermoelectric Harvesting (TEH) techniques. At the heart of this model is an IoT controller that runs on a single-sensor activation principle at all times, controls the sensor function and stores the sensor data in its internal memory (buffer), enabling efficient data management and transfer. The TDMA scheduling ensures that multiple sensors are engaged in a coordinated manner whereby a node is enabled only when needed reducing idle time, network collisions and contention, hence contributing to energy savings which is critical to our energy optimization plan. The proposed optimization model shows a 52.40% improvement in the energy conversation of the WBAN device, thus increasing the battery’s useful life by more than 50%.
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Liu, Penghao, Zhen Wu, Zheng Yao, Tengfei Wang, and Mingquan Lu. "Robust Single-point Localization Technique Using Downlink TDOA-AOA Fusion." In 2024 14th International Conference on Indoor Positioning and Indoor Navigation (IPIN). IEEE, 2024. https://doi.org/10.1109/ipin62893.2024.10786165.

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Feng, Zhixuan, Peng Gong, Yuhan Liu, Piao He, Bin Tang, and Guangwei Zhang. "Drone Signal TDOA Estimation Algorithm Based on an Improved Wavelet Threshold Denoising Technique." In 2025 27th International Conference on Advanced Communications Technology (ICACT). IEEE, 2025. https://doi.org/10.23919/icact63878.2025.10936674.

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Cui, Jiashuo, Jingyi Zhang, Qinglin Zou, and Xinyao Song. "Research on sonic boom localization of rocket debris based on TDOA algorithm localization technique." In 2024 IEEE 2nd International Conference on Electrical, Automation and Computer Engineering (ICEACE). IEEE, 2024. https://doi.org/10.1109/iceace63551.2024.10898888.

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Ravi Chandra, M. L., Bhargavi KVNA, and Ravilla Dilli. "Localization in 6G Communication Networks Using Low Complex Time of Arrival (TOA) and Time Difference of Arrival (TDOA) Techniques." In 2025 International Conference on Machine Learning and Autonomous Systems (ICMLAS). IEEE, 2025. https://doi.org/10.1109/icmlas64557.2025.10968791.

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Urie, A. "On the application of TDMA in UMTS." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961230.

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Gudmundson, B. "Evolution of the GSM air interface into wideband services." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961231.

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Dunlop, J. "Performance assessment of the advanced time division multiple access system by simulation." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961232.

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Barrett, S. "Spectrum efficient transport of variable bit rate ATM services over an ATDMA based micro-cellular system." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961233.

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Ling, Y. K. "Capacity of intelligent underlay and overlay network." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961234.

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Reports on the topic "TDMA Techniques"

1

Winters, Philip. Developing a Technique That Predicts the Impacts of TDM on a Transportation System. University of South Florida, 2010. http://dx.doi.org/10.5038/cutr-nctr-rr-2008-08.

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Winters, Philip, Amy Lester, and Minh Pham. SEGMENT: Applicability of an Existing Segmentation Technique to TDM Social Marketing Campaigns in the United States. Transportation Research and Education Center (TREC), 2018. http://dx.doi.org/10.15760/trec.210.

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