Relevant bibliographies by topics / Optical CDMA correlation receiver

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  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'Optical CDMA correlation receiver'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Optical CDMA correlation receiver"

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Kada, Biteur, and Benadda Lotfi. "Analysis of bit error rate for conventional receivers in DS-OCDMA utilizing extended prime codes." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 2 (2024): e9981. http://dx.doi.org/10.54021/seesv5n2-420.

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DS-OCDMA is a multiple access technique that enables simultaneous transmission of data from multiple users over a common optical channel. It leverages the principles of code division multiple access (CDMA) to allow for efficient utilization of bandwidth while maintaining minimal interference between users. The DS-OCDMA system employs unique optical codes for each user, enabling data to be spread across a wider bandwidth. The codes are typically designed to have specific properties, such as low cross-correlation, to minimize interference. Extended Prime Codes (EPC) (Huang, C., & Tseng, P.,
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Kedia, Deepak, and Ankita Rani. "Performance Evaluation of Correlation Properties of Quasi Orthogonal Prime Codes for Optical CDMA Communication." Journal of Optical Communications 41, no. 2 (2020): 195–207. http://dx.doi.org/10.1515/joc-2017-0172.

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AbstractOptical code division multiple access (OCDMA) is one of the promising technologies to be implemented using all-optical networks. The performance of OCDMA system is largely dependent on the particular codes used for encoding. A proper choice of code family as well as code dimension is of prime importance due to various transmitter and receiver design considerations. This paper mainly aims at evaluation of desirable characteristics of various spreading codes based on the prime sequences. An extensive effort has been done in this paper to evaluate the correlation characteristics of variou
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Yadav, Rajesh Yadav, and Gurjit Kaur Kaur. "Two Dimensional Tunable Optical-CDMA System." Indonesian Journal of Electrical Engineering and Computer Science 4, no. 1 (2016): 125. http://dx.doi.org/10.11591/ijeecs.v4.i1.pp125-132.

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<p>In this work an experimental demonstration is proposed to implement the synchronous optical code division multiple access system using two dimensional wavelength hopping and time spreading optical prime code is presented. An optical CDMA system is configured on latest version of optisystem by optiwave for the 20 users (Prime Number = 5) connected in a network operating at a bit rate 10 Gbps each. Tunability is achieved by using a MATLAB based delay selector which serves as the source of control signal for optical delay lines. The encoded optical signal of each user has been assigned a
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Yen, Chih-Ta, Jen-Fa Huang, and Wen-Zong Zhang. "Hiding Stealth Optical CDMA Signals in Public BPSK Channels for Optical Wireless Communication." Applied Sciences 8, no. 10 (2018): 1731. http://dx.doi.org/10.3390/app8101731.

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A new optical steganography scheme is proposed that transmits a stealth optical code-division multiple-access (OCDMA) signal through a public binary phase-shift keying (BPSK) channel. Polarization beam splitters and arrayed waveguide gratings are used to implement a spectral-polarization coding (SPC) system with an incoherent optical source. We employ a Walsh–Hadamard code as the signature code of the user who wants to transmit stealth information using the system. A free space optical link applied to this system maintains the polarization states of light during propagation. The secret data ar
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Fujii, Teruya, and Takayuki Suzuki. "RAKE received characteristics considering antenna diversity and path diversity for wideband DS‐CDMA system." Electronics and Communications in Japan (Part I: Communications) 84, no. 10 (2001): 36–54. http://dx.doi.org/10.1002/ecja.1046.

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AbstractWideband DS‐CDMA must have path diversity reception (RAKE reception) because the received waves are separated into multiple paths as the spread bandwidth widens. Analysis of the reception characteristics which takes into account the actual path characteristics is essential to produce an optimal design for RAKE reception. In this paper, we illustrate the received level characteristics when the number of correlators is limited and the received levels are combined by a RAKE receiver based on a specific path selection scheme in a practical antenna diversity reception model having received
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Rahmani, Mohamed, Abdelhamid Cherifi, Abdullah S. Karar, Ghoutia Naima Sabri, and Boubakar S. Bouazza. "Contribution of New Three-Dimensional Code Based on the VWZCC Code Extension in Eliminating Multiple Access Interference in Optical CDMA Networks." Photonics 9, no. 5 (2022): 310. http://dx.doi.org/10.3390/photonics9050310.

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In order to solve the problem of one-dimensional code length, two-dimensional code spatial length, phase induced intensity noise PIIN effect, improved system capacity, and increased the number of simultaneous users, a new three-dimensional spectral/time/spatial variable weight zero cross correlation code for non-coherent spectral amplitude coding-optical code division multiple access (3D-VWZCC-SAC-OCDMA) is proposed in this paper. Its construction is based on a one-dimensional (1D) spectral sequence and two-dimensional (2D) temporal/spatial sequences, which are characterized by the property of
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Yen, Chih Ta, and Wen Bin Chen. "A Study of Bipolar Walsh-Hadamard Coding Method in Optical CDMA Networks." Applied Mechanics and Materials 284-287 (January 2013): 2667–71. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2667.

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This study analyzes and calculates unipolar and bipolar coded configurations of spectral-amplitude-coding optical division multiple access (SAC-OCDMA) systems by using analytic and simulated methods. The important feature of the SAC-OCDMA systems is that multiple access interference (MAI) can be eliminated by code sequences of a fixed in-phase cross-correlation value. This property can be effectively canceled by multiple access interference by using balance detection schemes. This study uses Walsh-Hadamard codes as signature codes for the unipolar and bipolar schemes. The coder and decoder str
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Kanwal, Firdos, Khurram Karim Qureshi, Waqas A. Imtiaz, Anwar Ul Haq, and Jawad Mirza. "A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA." Applied Sciences 13, no. 16 (2023): 9347. http://dx.doi.org/10.3390/app13169347.

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Free space optics (FSO)-based optical body area networks (OBANs) are receiving massive attention as an opportunity to address the limitations of their radio frequency (RF)-based counterparts. This boom in research interests is primarily due to multitude of benefits, including high capacity, immunity to electromagnetic interference (EMI), rapid installation, cost efficiency, and license-free use of spectrum. Securing the transmission of patient health data against interception in OBANs using insecure FSO channels is a challenging task. Therefore, we propose a low-cost, flexible, and secure OBAN
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Villadangos, José Manuel, Jesús Ureña, Juan Jesús García-Domínguez, Ana Jiménez-Martín, Álvaro Hernández, and Mª Carmen Pérez-Rubio. "Dynamic Adjustment of Weighted GCC-PHAT for Position Estimation in an Ultrasonic Local Positioning System." Sensors 21, no. 21 (2021): 7051. http://dx.doi.org/10.3390/s21217051.

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Ultrasonic local positioning systems (ULPS) have been brought to the attention of researchers as one of the possibilities that can be used for indoor localization. Acoustic systems combine a suitable trade-off between precision, ease of development, and cost. This work proposes a method for measuring the time of arrival of encoded emissions from a set of ultrasonic beacons, which are used to implement an accurate ULPS. This method uses the generalized cross-correlation technique with PHAT filter and weighting factor β (GCC-PHAT-β). To improve the performance of the GCC-PHAT-β in encoded emissi
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Cheng, Hao, Na Yu, and Jun Liu. "Improved Natural Gradient Algorithms for Multi-Channel Signal Separation." Applied Mechanics and Materials 651-653 (September 2014): 2326–30. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.2326.

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In this paper, an Multi-channel blind separation of Direct Sequence Code Division Multiple Access (DS-CDMA) has been introduced. Most of which we assume statistically stationary sources as well as instantaneous mixtures of signals using blind source separation (BSS) algorithms. In practicality, the CDMA sources received are convolute mixing. A more complex blind separation algorithm is required to achieve better source separation. Based on the minimizing the average squared cross-output-channel-correlation, the proposed scheme obtains the better source separation. Simulation results show that
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Dissertations / Theses on the topic "Optical CDMA correlation receiver"

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Blankenship, T. Keith III. "Design and Implementation of a Pilot Signal Scanning Receiver for CDMA Personal Communication Services Systems." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36682.

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In cellular and personal communications services (PCS) systems based on code division multiple access (CDMA), a pilot signal is used on the forward link for synchronization, coherent detection, soft handoff, maintaining orthogonality between base stations, and, in the future, position location. It is critical that the percentage of power allocated to the pilot signal transmitted by each base station be fixed properly to ensure the ability of the CDMA network to support subscriber demand. <p> This thesis reports on the design and implementation of a prototype receiver for
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Karlsson, Andreas. "Simulation of a CDMA system based on optical orthogonal codes." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2300.

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<p>To take advantage of the high speed in an optic fiber, one of the basic concept in fiber optic communication is to allow several users to simultaneously transmit data over the channel. One technique that provides multiple access is it fiber optic-code division multiple access (FO-CDMA). In FO-CDMA each user is assigned one or more signature sequences called codewords, which are subsets of a type of optical orthogonal code (OOC). The channel input/output consists of the superposition of several users codewords and at the receiver end an optical correlator extracts the information. </p><p>In
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Chen, Jun-Hong, and 陳俊宏. "Optical CDMA Receiver Based on Parallel Interference Cancellation at Single Cancellation Stage." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/20785069286744437550.

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碩士<br>國立東華大學<br>電機工程學系<br>103<br>In an Optical Code Division Multiple Access (OCDMA) system, the error probability becomes larger when the number of users increases and so does the multiple access interference (MAI). As an interference suppression technique, an Optical Parallel Interference Cancellation (OPIC) scheme was introduced. The complexity, the high cost and the time consumption of this scheme, however, make it unsuitable for local area network (LAN). A simpler one-stage OPIC (OSOPIC) is thus derived in this paper to suppress the MAI. It reduces the cost and takes less time, which
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Ming-Chih, Hsieh. "Design and Implementation of Front End Circuit for Optical CDMA-Based Gigabit-EPON Receiver." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1901200704004900.

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Hsieh, Ming-Chih, and 謝明志. "Design and Implementation of Front End Circuit for Optical CDMA-Based Gigabit-EPON Receiver." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/06066897778545733436.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>95<br>Fiber-optic communication system is the best solution for large-capacity and low-cost communication. Recently, the data transmission has entered the gigabit domain to meet the increasing demand of the bandwidth. The backbone network and the Local-Area Network (LAN) have a great advance up to tens of gigabit per second. However, there is still a gap between backbone and LAN. The progress in access network doesn’t keep with the great advance of backbone and LAN. This is a well-known problem, “the First Mile”. A passive optical network (PON) is investigated as th
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Chen, Li-Shin, and 陳立欣. "Power Control on Double-Weight Codes with an Arbitrary Maximum Cross-correlation Value in Variable-QoS Optical CDMA Systems." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/m5ev9c.

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碩士<br>國立中興大學<br>通訊工程研究所<br>99<br>In this paper, the use of power and weight control in multimedia, variable quality-of-services (QoS) optical code-division multiple-access (O-CDMA) systems is studied. An adjustable-power and variable-weight O-CDMA architecture is presented and the general performance model of double-weight optical codes with an arbitrary maximum cross-correlation value is formulated as functions of code weight and chip power. Our results show that the performance of double-weight codes can be fine-tuned by varying both code weight and power, and they play different roles in th
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Yuan, Hsiao-Hsin, and 原孝鑫. "Accurate Analysis on Double-Weight Codes With an Arbitrary Maximum Cross-correlation Value for Different-Chip-Power Optical CDMA Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/23016399135871625213.

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碩士<br>國立中興大學<br>通訊工程研究所<br>100<br>Due to power restriction of some laser sources, the use of same power (per bit duration) in optical codes in incoherent optical code-division multiple-access multimedia networks with variable quality-of-services was previously studied. In those studies, the performance of double-weight codes with the maximum cross-correlation function=1 was exactly analyzed, but an approximation was only applied to the codes with the maximum cross-correlation function>1 due to mathematical complexity. In this thesis, an exact analytical model of double-weight codes with an arb
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Garg, Gagan. "Analysis Of A Sieving Heuristic For The Number Field Sieve And Design Of Low-Correlation CDMA Sequences." Thesis, 2009. https://etd.iisc.ac.in/handle/2005/1026.

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In this thesis, we investigate in detail, certain important problems in cryptography and coding theory. In the first part of this thesis, we discuss the number field sieve and compare the two ways in which the sieving step is implemented -one method using the line sieve and the other using the lattice sieve. We discuss why the lattice sieve performs better than the line sieve in the presence of large primes -this has not been attempted before. In the second part of this thesis, we design low-correlation CDMA sequences over the Quadrature Amplitude Modulation (QAM) alphabet. The sequences p
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Garg, Gagan. "Analysis Of A Sieving Heuristic For The Number Field Sieve And Design Of Low-Correlation CDMA Sequences." Thesis, 2009. http://hdl.handle.net/2005/1026.

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In this thesis, we investigate in detail, certain important problems in cryptography and coding theory. In the first part of this thesis, we discuss the number field sieve and compare the two ways in which the sieving step is implemented -one method using the line sieve and the other using the lattice sieve. We discuss why the lattice sieve performs better than the line sieve in the presence of large primes -this has not been attempted before. In the second part of this thesis, we design low-correlation CDMA sequences over the Quadrature Amplitude Modulation (QAM) alphabet. The sequences pro
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Book chapters on the topic "Optical CDMA correlation receiver"

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Sharma, Teena. "Optical Code Construction of Balanced Weight Ideal Cross-Correlation Code for Spectral Amplitude Coding Optical CDMA Systems." In Lecture Notes in Electrical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2818-4_5.

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"Analysis of Same-Bit-Power Double-Weight Codes with the Maximum Cross-Correlation Value of Two for Variable-QoS Optical CDMA." In International Conference on Computer Engineering and Technology, 3rd (ICCET 2011). ASME Press, 2011. http://dx.doi.org/10.1115/1.859735.paper123.

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Conference papers on the topic "Optical CDMA correlation receiver"

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Fei, Leyan, Mengfan Fu, Yicheng Xu, et al. "Localization of Multipath Interference in IM/DD Systems by Receiver-side DSP Using Signal and Noise Correlation." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.m1e.8.

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We propose and experimentally demonstrate an MPI localization scheme based on signal and noise correlation (SNC) and cyclic accumulation (CA), achieving localization accuracy of 3m and a 4000-fold reduction in storage requirement for correlation operations.
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May, Alix, Fabien Boitier, and Patricia Layec. "Advanced Optical Link Tomography for Optical Network Monitoring." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.m2c.5.

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We review methods for optical link tomography, particularly receiver-based power profile estimation. We highlight key works including a demonstration over 10,000 km and an accuracy comparison between linear least squares method and deconvoluted correlation-based method.
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Vethanayagam, N., and R. I. MacDonald. "Demonstration of a Novel Optical Code Division Multiplex system at 800 MChips/s." In Photonic Switching. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.we5.

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Direct sequence Code Division Multiple Access (CDMA) provides a method of exploiting the wide bandwidth offered by optical fibres without the added complexity of wideband electronics. Each data bit is encoded with a code sequence (of N chips) which represents the destination address of each data bit. The correct selection of orthogonal codes allows the data bit destined for a given receiver to be extracted in the presence of noise (i.e., interference from other users in the system). Due to the uni-polar nature of light, coding schemes used in conventional CDMA cannot be applied directly to opt
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Prucnal, Paul R., and Mario Santoro. "Local area network with optical spread spectrum processing." In OSA Annual Meeting. Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.wj25.

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Asynchronous multiplexing schemes are most applicable when the traffic on the network is characterized by relatively long idle periods between the transmitted packets of data. An asynchronous system that provides random access makes the most efficient use of the channel. However, when the intensity of the traffic increases (i.e., the channel is being accessed by many users at the same time), collisions between packets become unavoidable and the throughput of the channel is greatly degraded. To alleviate this problem, spread spectrum multiplexing techniques, commonly known as code division mult
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Buxbaum, Bernd, Rudolf Schwarte, Thorsten Ringbeck, et al. "Wireless LAN based on optical CDMA using a new high-speed correlation receiver (MSM-PMD)." In ITCom 2001: International Symposium on the Convergence of IT and Communications, edited by Eric J. Korevaar. SPIE, 2001. http://dx.doi.org/10.1117/12.449808.

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Zabihi-Maddah, S., and M. Kakhki. "Code cross-correlation effects on the performance of optical cdma systems in the presence of receiver noises." In 18th International Conference on Telecommunications (ICT 2011). IEEE, 2011. http://dx.doi.org/10.1109/cts.2011.6024144.

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Forouzan, A. R., M. Nasiri-Kenari, J. A. Salehi, and N. Rezaee. "Chip-level detector with optimum comparator threshold and correlation receiver with an electrical hard-limiter for optical cdma." In IEEE International Symposium on Information Theory, 2003. Proceedings. IEEE, 2003. http://dx.doi.org/10.1109/isit.2003.1228341.

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Mashaal, Ahmed F., Reda Elsheshtawy, Ashraf G. Elmeligy, and El-Sayed A. El-Badawy. "Analysis of static idealized 1D/2D optical CDMA correlation receivers using fiber Bragg grating." In 2011 High Capacity Optical Networks and Enabling Technologies (HONET). IEEE, 2011. http://dx.doi.org/10.1109/honet.2011.6149768.

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Elmeligy, Ashraf G., Alaa Hasez, and El-Sayed A. El-Badawy. "Analysis of static/dynamic 2-D optical CDMA correlation and chip level receivers under both shot and thermal noises using array waveguide grating." In 2009 6th International Symposium on High Capacity Optical Networks and Enabling Technologies (HONET). IEEE, 2009. http://dx.doi.org/10.1109/honet.2009.5423066.

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Fersch, Thomas, Md Ferdous Alam, Robert Weigel, and Alexander Koelpin. "A FPGA correlation receiver for CDMA encoded LiDAR signals." In 2017 13th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME). IEEE, 2017. http://dx.doi.org/10.1109/prime.2017.7974164.

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