Relevant bibliographies by topics / Code division multiple access. Radio Mobile communication systems

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Code division multiple access. Radio Mobile communication systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Code division multiple access. Radio Mobile communication systems.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Code division multiple access. Radio Mobile communication systems"

1

Yarlykov, M. S., and S. M. Yarlykova. "Signal-detection and signal-processing algorithms for code-division multiple-access satellite mobile communications systems employed simultaneously with satellite radio navigation systems." Journal of Communications Technology and Electronics 51, no. 8 (August 2006): 874–94. http://dx.doi.org/10.1134/s1064226906080055.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zidane, Mohammed, Said Safi, Mohamed Sabri, and Miloud Frikel. "Using Least Mean p-Power Algorithm to Correct Channel Distortion in MC-CDMA Systems." Journal of Telecommunications and Information Technology 3 (September 28, 2018): 23–30. http://dx.doi.org/10.26636/jtit.2018.114717.

Full text
Abstract:
This work focuses on adaptive Broadband Radio Access Network (BRAN) channel identification and on downlink Multi-Carrier Code Division Multiple Access (MCCDMA) equalization. We use the normalized BRAN C channel model for 4G mobile communications, distinguishing between indoor and outdoor scenarios. On the one hand, BRAN C channel parameters are identified using the Least Mean p-Power (LMP) algorithm. On the other, we consider these coefficients in the context of adaptive equalization. We provide an overview and a mathematic formulation of MC-CDMA systems. According to these fundamental concepts, the equalizer technique is investigated analytically to compensate for channel distortion in terms of the bit error rate (BER). The numerical simulation results, for various signal-to-noise ratios and different p threshold, show that the presented algorithm is able to simulate the BRAN C channel measured with different accuracy levels. Furthermore, as far as the adaptive equalization problem is concerned, the results obtained using the zero-forcing equalizer demonstrate that the algorithm is adequate for some particular cases of threshold p.
APA, Harvard, Vancouver, ISO, and other styles
3

Jiménez-Pacheco, Alberto, Ángel Fernández-Herrero, and Javier Casajús-Quirós. "Design and Implementation of a Hardware Module for MIMO Decoding in a 4G Wireless Receiver." VLSI Design 2008 (January 31, 2008): 1–8. http://dx.doi.org/10.1155/2008/312614.

Full text
Abstract:
Future 4th Generation (4G) wireless multiuser communication systems will have to provide advanced multimedia services to an increasing number of users, making good use of the scarce spectrum resources. Thus, 4G system design should pursue both higher-transmission bit rates and higher spectral efficiencies. To achieve this goal, multiple antenna systems are called to play a crucial role. In this contribution we address the implementation in FPGAs of a multiple-input multiple-output (MIMO) decoder embedded in a prototype of a 4G mobile receiver. This MIMO decoder is part of a multicarrier code-division multiple-access (MC-CDMA) radio system, equipped with multiple antennas at both ends of the link, that is able to handle up to 32 users and provides raw transmission bit-rates up to 125 Mbps. The task of the MIMO decoder is to appropriately combine the signals simultaneously received on all antennas to construct an improved signal, free of interference, from which to estimate the transmitted symbols. A comprehensive explanation of the complete design process is provided, including architectural decisions, floating-point to fixed-point translation, and description of the validation procedure. We also report implementation results using FPGA devices of the Xilinx Virtex-4 family.
APA, Harvard, Vancouver, ISO, and other styles
4

Thrimurthulu, V., and N. S. Murti Sarma. "Investigation on Interference Mitigation Schemes for Next Generation Cellular Communications." International Journal of Engineering & Technology 7, no. 2.20 (April 18, 2018): 230. http://dx.doi.org/10.14419/ijet.v7i2.20.14768.

Full text
Abstract:
The fanciful quick development and exponential increment of advanced mobile phones the remote info activity request is additional within the returning years. That forces reexamining current remote cell arranges thanks to the shortage of the accessible vary. 2 noteworthy difficulties for advancing future Evolution (LTE) systems area unit to accomplish improved cell scope and framework limit contrasted and broadband Code Division Multiple Access (WCDMA) framework. Powerful use of radio assets and thick vary use is at the middle to realize these objectives. Be that because it might, thick repeat use might increment between cell electric resistance, that so extraordinarily restricts the limit of shoppers within the framework. Between cell obstruction will limit general framework execution as so much as output and preternatural productivity, significantly for the shoppers set at the cell edge region. later on, cautious administration of between cell obstructions finishes up vital to boost LTE framework execution. during this paper, obstruction alleviation plans for LTE downlink systems area unit investigated. The eNB and also the Mobile-Femto as each provide similar assets and transfer speed. This has created AN electric resistance issue from the downlink signs of every alternative to their UEs. this examination has adjusted a adept repeat use conspire that worked powerfully finished separation and accomplished increased outcomes within the flag quality and output of Macro and Mobile-Femto UE once contrasted with past electric resistance administration plans e.g. Partial Frequency use factor1 (NoFFR-3) and uncomplete Frequency use factor3 (FFR-3). Keywords: The fanciful quick development and exponential increment of advanced mobile phones the remote info activity request is additional within the returning years. That forces reexamining current remote cell arranges thanks to the shortage of the accessible vary. 2 noteworthy difficulties for advancing future Evolution (LTE) systems area unit to accomplish improved cell scope and framework limit contrasted and broadband Code Division Multiple Access (WCDMA) framework. Powerful use of radio assets and thick vary use is at the middle to realize these objectives. Be that because it might, thick repeat use might increment between cell electric resistance, that so extraordinarily restricts the limit of shoppers within the framework. Between cell obstruction will limit general framework execution as so much as output and preternatural productivity, significantly for the shoppers set at the cell edge region. later on, cautious administration of between cell obstructions finishes up vital to boost LTE framework execution. during this paper, obstruction alleviation plans for LTE downlink systems area unit investigated. The eNB and also the Mobile-Femto as each provide similar assets and transfer speed. This has created AN electric resistance issue from the downlink signs of every alternative to their UEs. this examination has adjusted a adept repeat use conspire that worked powerfully finished separation and accomplished increased outcomes within the flag quality and output of Macro and Mobile-Femto UE once contrasted with past electric resistance administration plans e.g. Partial Frequency use factor1 (NoFFR-3) and uncomplete Frequency use factor3 (FFR-3).
APA, Harvard, Vancouver, ISO, and other styles
5

Yang, Tao, and Leon O. Chua. "Chaotic Digital Code-Division Multiple Access (CDMA) Communication Systems." International Journal of Bifurcation and Chaos 07, no. 12 (December 1997): 2789–805. http://dx.doi.org/10.1142/s0218127497001886.

Full text
Abstract:
In this paper, the structure, principle and framework of chaotic digital code-division multiple access ((CD)2 MA) communication systems are presented. Unlike the existing CDMA systems, (CD)2MA systems use continuous pseudo-random time series to spread the spectrum of message signal and the spread signal is then directly sent through a channel to the receiver. In this sense, the carrier used in (CD)2MA is a continuous pseudo-random signal instead of a single tone as used in CDMA. We give the statistical properties of the noise-like carriers. In a (CD)2MA system, every mobile station has the same structure and parameters, only different initial conditions are assigned to different mobile stations. Instead of synchronizing two binary pseudo-random sequences as in CDMA systems, we use an impulsive control scheme to synchronize two chaotic systems in (CD)2MA. The simulation results show that the channel capacity of (CD)2MA is twice as large than that of CDMA.
APA, Harvard, Vancouver, ISO, and other styles
6

Fapojuwo, A. O. "Radio capacity of direct sequence code division multiple access mobile radio systems." IEE Proceedings I Communications, Speech and Vision 140, no. 5 (1993): 402. http://dx.doi.org/10.1049/ip-i-2.1993.0058.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Fischer, G., F. Pivit, and W. Wiebeck. "Link budget comparison of different mobile communication systems based on EIRP and EISL." Advances in Radio Science 2 (May 27, 2005): 127–33. http://dx.doi.org/10.5194/ars-2-127-2004.

Full text
Abstract:
Abstract. The metric EISL (Equivalent Isotropic Sensitivity Level) describing the effective sensitivity level usable at the air interface of a mobile or a basestation is used to compare mobile communication systems either based on time division or code division multiple access in terms of coverage and emission characteristics. It turns out that systems that organize the multiple access by different codes rather than different timeslots run at less emission and offer greater coverage.
APA, Harvard, Vancouver, ISO, and other styles
8

MINOMO, MASAHIRO, and TATSURO MASAMURA. "PROSPECTS FOR MOBILE COMMUNICATION SYSTEMS AND KEY TECHNOLOGIES CAPABLE OF SUPPORTING EXPANDING MOBILE MULTIMEDIA SERVICES." Journal of Circuits, Systems and Computers 13, no. 02 (April 2004): 237–51. http://dx.doi.org/10.1142/s0218126604001404.

Full text
Abstract:
The first commercial service of the 3rd generation (3G) mobile communication system, IMT-2000 (International Mobile Telecommunications), was launched in October 2001 in Japan. This is the first 3G service employing Wideband Code Division Multiple Access (W-CDMA) as its air interface between mobile terminals and base stations. This new system, 3G, is expected to accelerate the deployment of future mobile multimedia services, which substantially got started with the "i-mode" service in February 1999 in Japan. Research activities into future mobile communication systems capable of supporting a vastly expanded market for mobile multimedia services are underway worldwide. This paper describes the vision, service trends, and technical challenges of such future systems. Broadband packet wireless access, Variable Spreading Factor Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM), are promising candidates for realizing future mobile communication systems that provide higher transmission rates and capacity than 3G systems.
APA, Harvard, Vancouver, ISO, and other styles
9

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 (April 1, 2015): 1. http://dx.doi.org/10.11591/ijict.v4i1.pp1-6.

Full text
Abstract:
<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 &amp; TDMA techniques depending on various factors such as spectrum, channel band width etc.</p>
APA, Harvard, Vancouver, ISO, and other styles
10

Gurevich, V., and S. Egorov. "Modeling of Amplitude Characteristic in Radio Channels of Code Division Multiple Access Systems." Proceedings of Telecommunication Universities 6, no. 2 (2020): 30–38. http://dx.doi.org/10.31854/1813-324x-2020-6-2-30-38.

Full text
Abstract:
In CDMA radio access systems, amplitude distortions in a nonlinear amplifier (NA) of a group signal lead to bit errors at the outputs of subscriber channels. To assess the permissible distortion limits and their influence on the transmission quality of subscriber signals, an electronic model of the amplitude characteristic (AC) and analytical relations are needed that relate the probability of an error when registering the output signal of the communication channel with the nonlinearity of the AC NA and other destabilizing factors. The article compares alternative mathematical models of AC NA. In contrast to traditional methods of analysis, usually limited to the choice of models with fixed parameters, a method for variably determining the parameters of AC is considered. The results are: a comparison of known methods for approximating the AC of broadband nonlinear power amplifiers of radio signals is given, an algorithm for selecting model parameters for CDMA systems with QAM using the Rapp model is proposed.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Code division multiple access. Radio Mobile communication systems"

1

Lau, Hing-keung. "Pilot-symbol-aided techniques for spectrally efficient signals in multipath-fading channels /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19669161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Said, Nezar Ali. "Performance analysis of multi-carrier code division multiple access system in multipath fading channels." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176401917.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

劉慶強 and Hing-keung Lau. "Pilot-symbol-aided techniques for spectrally efficient signals in multipath-fading channels." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31237198.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ma, Ming. "Multiuser mobile communication systems." Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289069.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Shi, Lishen. "Coherent optical code division multiple access (CDMA) network employing CW semiconductor lasers." Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273787.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Srirattana, Nuttapong. "High-Efficiency Linear RF Power Amplifiers Development." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6899.

Full text
Abstract:
Next generation mobile communication systems require the use of linear RF power amplifier for higher data transmission rates. However, linear RF power amplifiers are inherently inefficient and usually require additional circuits or further system adjustments for better efficiency. This dissertation focuses on the development of new efficiency enhancement schemes for linear RF power amplifiers. The multistage Doherty amplifier technique is proposed to improve the performance of linear RF power amplifiers operated in a low power level. This technique advances the original Doherty amplifier scheme by improving the efficiency at much lower power level. The proposed technique is supported by a new approach in device periphery calculation to reduce AM/AM distortion and a further improvement of linearity by the bias adaptation concept. The device periphery adjustment technique for efficiency enhancement of power amplifier integrated circuits is also proposed in this work. The concept is clearly explained together with its implementation on CMOS and SiGe RF power amplifier designs. Furthermore, linearity improvement technique using the cancellation of nonlinear terms is proposed for the CMOS power amplifier in combination with the efficiency enhancement technique. In addition to the efficiency enhancement of power amplifiers, a scalable large-signal MOSFET model using the modified BSIM3v3 approach is proposed. A new scalable substrate network model is developed to enhance the accuracy of the BSIM3v3 model in RF and microwave applications. The proposed model simplifies the modeling of substrate coupling effects in MOS transistor and provides great accuracy in both small-signal and large-signal performances.
APA, Harvard, Vancouver, ISO, and other styles
7

Sivanesan, Kathiravetpillai. "A study of performance for M-ary DS/CDMA cellular mobile radio systems." Click to view the E-thesis via HKUTO, 1999. http://sunzi.lib.hku.hk/hkuto/record/B42575333.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

鄭价昌 and Kai-cheong Chang. "Adaptive channel equalisation technique for wideband time-division multiple access digital mobile radio communications systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31212888.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Chang, Kai-cheong. "Adaptive channel equalisation technique for wideband time-division multiple access digital mobile radio communications systems /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17590371.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ward, Richard Peter. "Evolution of loosely synchronized spreading codes in code-division multiple-access systems." Thesis, University of South Wales, 2008. https://pure.southwales.ac.uk/en/studentthesis/evolution-of-loosely-synchronized-spreading-codes-in-codedivision-multipleaccess-systems(2bf79128-319c-49c1-8246-91ee0d3533c4).html.

Full text
Abstract:
Loosely Synchronized (LS) codes can be used as spreading codes in quasi­ synchronous code-division multiple-access (QS-CDMA) systems. In such CDMA systems, close control of synchronization is achieved at the chip level, interme­ diate between that in synchronous CDMA and that in asynchronous CDMA. The LS code can then capitalize on zero correlation in a limited synchronization window to reduce code correlations and so reduce interference. LS codes are {O, +1, -1} codes constructed using Hadamard matrices and Golay pairs. A variation of LS codes inserts short strings of zeros between the components of the Golay pairs to increase the number of codewords, with only limited dete­ rioration in the correlations. These strings of zeros are known as internal padding. One of the advantages normally claimed for CDMA systems is resistance to eavesdropping and jamming. It might appear at first sight that the structure of LS codes is rather predictable in comparison with codes constructed using linear feedback shift registers, such as m-sequences or Gold codes. One way to overcome any such difficulty would be to evolve the code very quickly, in such a way that by the time a generation of the code is determined (or determined to a moderate correlation value) it is too late to exploit it. This thesis explores the way that LS codes can be evolved in order to achieve resistance to eavesdropping and jamming. The thesis starts with a detailed account of the necessary background and of the construction of Loosely Synchronized codes. The early part of the thesis then concentrates on showing that many generations of LS code can be constructed in such a way that the correlation between distinct generations is small. This prevents one observed generation of the code from being used for jamming or prediction in another generation. Specifically: •The construction of Golay pairs is investigated and a search is carried out over all possible Golay pairs and their mates to find a set of pairs that leads to the satisfaction of a suitable correlation criterion; •Bent functions, almost bent functions and other second order Boolean functions are used to create sets of Hadamard matrices that are guaranteed to satisfy the same correlation criterion; •A sequential search method to generate a set of arrangements of the internal padding that satisfies the same correlation criterion is described. Later in the thesis this approach is replaced by a recency list approach. This ensures that the correlation criterion is satisfied against recently used generations of the code, in place of all generations of the code; •The way in which these evolutions of the components combine together is also explored. Attention turns in the second part of the thesis to the mechanisms for evolution and the way that these might be predicted by a third party observer. Transform methods that the third party might use are described. Detailed simulations quantify the ability of the third party to identify the code during the transmission of a single bit. It is shown that theoretical resistance to early code prediction is not possible, although it might be possible to demonstrate security arising from the relative speed of the necessary computations for the user and the observer. This would require a detailed hardware study, and this is listed as future work. In fact it is shown here that LS codes are actually better than linear feedback shift register codes, as a result of the Berlekamp-Massey algorithm. Attention is also focussed on the scenario in which details of the algorithms of one user are obtained by the third party. Only the Hadamard matrix provides protection against this scenario, as all other components of the construction are shared between all users. From this second viewpoint the true weakness of LS codes becomes apparent. Although the Hadamard matrix constructions are satisfactory if the order of the Hadamard matrix is not too small, it seems that the sequence of Hadamard matrix rows of each user must be computed centrally and distributed to users as private keys if this scenario is not to remain a major concern. The volume of private key distribution necessary may seem unattractive to operators. Ultimately it seems that evolution of the Golay pairs may have little real role except to increase the workload of the observer. The recency list based evolution of internal padding can take the main role in ensuring low correlation between close generations of the code. The evolution of the Hadamard matrix should be designed to concentrate on the second viewpoint, where the third party has obtained details of the algorithms of one user.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Code division multiple access. Radio Mobile communication systems"

1

Zigangirov, K. Sh. Theory of code division multiple access communication. Piscataway, NJ: IEEE Press, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Mullany, Francis Joseph. Quasi-synchronous CDMA in mobile satellite communications systems. Dublin: University College Dublin, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mullany, Francis Joseph. Quasi-synchronous CDMA in mobile satellite communications systems. Dublin: University College Dublin, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

McDarby, Gareth. Prefiltering and adaptive equalisation for GSM. Dublin: University College Dublin, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Wireless location in CDMA cellular radio systems. Boston: Kluwer Academic, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Fanucci, Luca. An experimental approach to CDMA and interference mitigation: From system architecture to hardware testing through VLSI design. Boston: Kluwer Academic, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Rooyen, Pieter Van. Space-time processing for CDMA mobile communications. Boston: Kluwer Academic Publishers, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Tachikawa, Keiji. W-CDMA: Mobile communications system. Hoboken, NJ: J. Wiley, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

E, Miller Leonard, ed. CDMA systems engineering handbook. Boston, Mass: Artech House, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

M, Sarraf, ed. W-CDMA and cdma2000 for 3G mobile networks. New York: McGraw-Hill, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Code division multiple access. Radio Mobile communication systems"

1

"Introduction to Cellular Mobile Radio Communication." In Theory of Code Division Multiple Access Communication, 1–35. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2004. http://dx.doi.org/10.1002/047165549x.ch1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zhang, Yan, Yifan Chen, Rong Yu, Supeng Leng, Huansheng Ning, and Tao Jiang. "Access Security in UMTS and IMS." In Handbook of Research on Wireless Security, 339–50. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-899-4.ch021.

Full text
Abstract:
Motivated by the requirements for higher data rate, richer multimedia services, and broader radio range wireless mobile networks are currently in the stage evolving from the second-generation (2G), for example, global system for mobile communications (GSM), into the era of third-generation (3G) or beyond 3G or fourth-generation (4G). Universal mobile telecommunications system (UMTS) is the natural successor of the current popular GSM (http://www.3gpp.org) code division multiple access 2000 (CDMA2000) is the next generation version for the CDMA-95, which is predominantly deployed in North America and North Korea. Time division-sychrononous CDMA (TD-SCDMA) is in the framework of 3rd generation partnership project 2 (3GPP2) and is expected to be one of the principle wireless technologies employed in China in the future (http://www.3gpp.org; 3G TS 35.206). It is envisioned that each of three standards in the framework of international mobile telecommunications- 2000 (IMT-2000) will play a significant role in the future due to the backward compatibility, investment, maintenance cost, and even politics.
APA, Harvard, Vancouver, ISO, and other styles
3

Zhang, Yan, Yifan Chen, Rong Yu, Supeng Leng, Huansheng Ning, and Tao Jiang. "Access Security in UMTS and IMS." In Networking and Telecommunications, 1437–48. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-986-1.ch094.

Full text
Abstract:
Motivated by the requirements for higher data rate, richer multimedia services, and broader radio range wireless mobile networks are currently in the stage evolving from the second-generation (2G), for example, global system for mobile communications (GSM), into the era of third-generation (3G) or beyond 3G or fourth-generation (4G). Universal mobile telecommunications system (UMTS) is the natural successor of the current popular GSM (http://www.3gpp.org) code division multiple access 2000 (CDMA2000) is the next generation version for the CDMA-95, which is predominantly deployed in North America and North Korea. Time division-sychrononous CDMA (TD-SCDMA) is in the framework of 3rd generation partnership project 2 (3GPP2) and is expected to be one of the principle wireless technologies employed in China in the future (http://www.3gpp.org; 3G TS 35.206). It is envisioned that each of three standards in the framework of international mobile telecommunications- 2000 (IMT-2000) will play a significant role in the future due to the backward compatibility, investment, maintenance cost, and even politics.
APA, Harvard, Vancouver, ISO, and other styles
4

Parmar, Sargam, and Bhuvan Unhelkar. "Independent Component Analysis Algorithms in Wireless Communication Systems." In Handbook of Research in Mobile Business, Second Edition, 456–63. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-156-8.ch043.

Full text
Abstract:
In commercial cellular networks, like the systems based on direct sequence code division multiple access (DSCDMA), many types of interferences can appear, starting from multi-user interference inside each sector in a cell to interoperator interference. Also unintentional jamming can be present due to co-existing systems at the same band, whereas intentional jamming arises mainly in military applications. Independent Component Analysis (ICA) use as an advanced pre-processing tool for blind suppression of interfering signals in direct sequence spread spectrum communication systems utilizing antenna arrays. The role of ICA is to provide an interference-mitigated signal to the conventional detection. Several ICA algorithms exist for performing Blind Source Separation (BSS). ICA has been used to extract interference signals, but very less literature is available on the performance, that is, how does it behave in communication environment? This needs an evaluation of its performance in communication environment. This chapter evaluates the performance of some major ICA algorithms like Bell and Sejnowski’s infomax algorithm, Cardoso’s Joint Approximate Diagonalization of Eigen matrices (JADE), Pearson-ICA, and Comon’s algorithm in a communication blind source separation problem. Independent signals representing Sub-Gaussian, Super-Gaussian, and mix users, are generated and then mixed linearly to simulate communication signals. Separation performance of ICA algorithms is measured by performance index.
APA, Harvard, Vancouver, ISO, and other styles
5

Wang, Ju, and Jonathan C. L. Liu. "Advances of Radio Interface in WCDMA Systems." In Encyclopedia of Multimedia Technology and Networking, Second Edition, 9–14. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch002.

Full text
Abstract:
Recent years have witnessed the rapid progress in handheld devices. This has resulted in a growing number of mobile phones or PDAs that have a built-in camera to record still pictures or live videos. Encouraged by the success of second generation cellular wireless networks, researchers are now pushing the 3G standard to support a seamless integration of multimedia data services. One of the main products is WCDMA (Holma & Toskala, 2001), short for wideband code division multiple access. WCDMA networks have 80 million subscribers in 46 countries at the time of this writing. WCDMA can be viewed as a successor of the 2G CDMA system. In fact, many WCDMA technologies can be traced back to the 2G CDMA system. However, WCDMA air interface is specifically designed with envision to support real time multimedia services. To name some highlights, WCDMA: • Supports both packet-switched and circuitswitched data services. Mobile best-effort data services, such as Web surfing and file downloads, are available through packet service. • Has more bandwidth allocated for downlink and uplink than the 2G systems. It uses a 5 MHz wide radio signal and a chip rate of 3.84 mcps, which is about three times higher than CDMA2000. • Support a downlink data rate of 384 kbps for wide area coverage and up to 2 Mbps for hot-spot areas, which is sufficient for most existing packet-data applications. WCDMA Release 5 (Erricson, 2004) adopts HSDPA (High-speed downlink packet access), which increases peak data rates to 14 Mbps in the downlink. To achieve high data rate, WCDMA uses several new radio interface technologies, including (1) shared channel transmission, (2) higher-order modulation, (3) fast link adaptation, (4) fast scheduling, and (5) hybrid automatic-repeat-request (HARQ). These technologies have been successfully used in the downlink HSDPA, and will be used in upcoming improved uplink radio interface in the future. The rest of this article will explain the key components of the radio interface in WCDMA.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Code division multiple access. Radio Mobile communication systems"

1

Madhukumar, A. S., A. B. Premkumar, Peng Xiaoming, and Francois Chin. "A Simplified Approach for Peak-to-Average Power Reduction for Multicarrier Code Division Multiple Access Systems." In 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, 2007. http://dx.doi.org/10.1109/pimrc.2007.4394309.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yang, Lie-liang. "Time-Hopping Multicarrier Code-Division Multiple-Access: System Outline and Performance." In 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, 2006. http://dx.doi.org/10.1109/pimrc.2006.254401.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Yang, Lie-liang. "Reduced-Rank MMSE Detection in Space-Time Coded Space-Division Multiple-Access Systems." In 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, 2006. http://dx.doi.org/10.1109/pimrc.2006.254382.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yong Fang and Jiale Fan. "Improved linear multiuser detector for synchronous code-division multiple-access communication systems." In Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (IEEE Cat. No.04EX710). IEEE, 2004. http://dx.doi.org/10.1109/casset.2004.1322007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Purchla, Magdalena. "Reduction of the near-far effect in mobile communication systems with Code-Division Multiple-Access." In SPIE Proceedings, edited by Ryszard S. Romaniuk. SPIE, 2006. http://dx.doi.org/10.1117/12.674962.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Code division multiple access. Radio Mobile communication systems' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography