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

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

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

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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

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

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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.
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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.

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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.
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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 (2004): 237–51. http://dx.doi.org/10.1142/s0218126604001404.

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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.
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Trung, Nguyen Huu, and Doan Thanh Binh. "LARGE-SCALE MIMO MC-CDMA SYSTEM USING COMBINED MULTIPLE BEAMFORMING AND SPATIAL MULTIPLEXING." Vietnam Journal of Science and Technology 56, no. 1 (2018): 102. http://dx.doi.org/10.15625/2525-2518/56/1/9204.

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This paper proposes a novel Large-scale (massive) Multi-input Multi-output Multi-carrier Code division multiple access (LS MIMO MC-CDMA) model and application to Fifth-Generation Mobile Communication Systems (5G). This system uses combined cylindrical array antenna multiple beamforming architecture with spatial multiplexing. The model is optimized by Min-Max criteria in order to minimize side lobes and maximize compression of propagation loss. The Monte Carlo simulation results unify with the analytical solution for system performance.
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Dong, Jian, Xiaping Yu, and Guoqiang Hu. "Design of a Compact Quad-Band Slot Antenna for Integrated Mobile Devices." International Journal of Antennas and Propagation 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/3717681.

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In order to incorporate different communication standards into a single device, a compact quad-band slot antenna is proposed in this paper. The proposed antenna is composed of a dielectric substrate, T-shaped microstrip patch with a circle slot and an inverted L-slot, and a comb-shaped ground on the back of the substrate. By adopting these structures, it can produce four different bands, while maintaining a small size and a simple structure. Furthermore, a prototype of the quad-band antenna is designed and fabricated. The simulated and measured results show that the proposed antenna can operate over the 1.79–2.63 GHz, 3.46–3.97 GHz, 4.92–5.85 GHz, and 7.87–8.40 GHz, which can cover entire PCS (Personal Communications Service, 1.85–1.99 GHz), UMTS (Universal Mobile Telecommunications System, 1.92–2.17 GHz), WCDMA (wideband code-division multiple access, 2.1 GHz), Bluetooth (2.4–2.48 GHz), WiBro (Wireless Broad band access service, 2.3–3.39 GHz), WLAN (Wireless Local Area Networks, 2.4/5.2/5.8 GHz), WiMAX (Worldwide Interoperability for Microwave Access, 2.5/3.5/5.5 GHz), and X-band SATcom applications (7.9~8.4 GHz). The proposed antenna is particularly attractive for mobile devices integrating multiple communication systems.
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van der Hofstad, Remco, and Marten J. Klok. "Improving the performance of third-generation wireless communication systems." Advances in Applied Probability 36, no. 04 (2004): 1046–84. http://dx.doi.org/10.1017/s0001867800013318.

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The third-generation (3G) mobile communication system uses a technique called code division multiple access (CDMA), in which multiple users use the same frequency and time domain. The data signals of the users are distinguished using codes. When there are many users, interference deteriorates the quality of the system. For more efficient use of resources, we wish to allow more users to transmit simultaneously, by using algorithms that utilize the structure of the CDMA system more effectively than the simple matched filter (MF) system used in the proposed 3G systems. In this paper, we investigate an advanced algorithm called hard-decision parallel interference cancellation (HD-PIC), in which estimates of the interfering signals are used to improve the quality of the signal of the desired user. We compare HD-PIC with MF in a simple case, where the only two parameters are the number of users and the length of the coding sequences. We focus on the exponential rate for the probability of a bit-error, explain the relevance of this parameter, and investigate how it scales when the number of users grows large. We also review extensions of our results, proved elsewhere, showing that in HD-PIC, more users can transmit without errors than in the MF system.
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van der Hofstad, Remco, and Marten J. Klok. "Improving the performance of third-generation wireless communication systems." Advances in Applied Probability 36, no. 4 (2004): 1046–84. http://dx.doi.org/10.1239/aap/1103662958.

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The third-generation (3G) mobile communication system uses a technique called code division multiple access (CDMA), in which multiple users use the same frequency and time domain. The data signals of the users are distinguished using codes. When there are many users, interference deteriorates the quality of the system. For more efficient use of resources, we wish to allow more users to transmit simultaneously, by using algorithms that utilize the structure of the CDMA system more effectively than the simple matched filter (MF) system used in the proposed 3G systems. In this paper, we investigate an advanced algorithm called hard-decision parallel interference cancellation (HD-PIC), in which estimates of the interfering signals are used to improve the quality of the signal of the desired user. We compare HD-PIC with MF in a simple case, where the only two parameters are the number of users and the length of the coding sequences. We focus on the exponential rate for the probability of a bit-error, explain the relevance of this parameter, and investigate how it scales when the number of users grows large. We also review extensions of our results, proved elsewhere, showing that in HD-PIC, more users can transmit without errors than in the MF system.
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N. Motade, Sumitra, and Anju V. Kulkarni. "Incremental gradient algorithm for multiuser detection in multi-carrier DS-CDMA system under modulation schemes." International Journal of Engineering & Technology 7, no. 2.6 (2018): 311. http://dx.doi.org/10.14419/ijet.v7i2.6.11270.

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Nowadays, Multicarrier Direct sequence code division multiple access (MC DS-CDMA) systems are used in mobile communication. Performance of these systems are limited by multiple access interference (MAI) created by spread-spectrum users in the channel as well as background channel noise. This paper proposes an incremental gradient descent (IGD) multi-user detection (MUD) for MC DS-CDMA system that can achieve near-optimum performance while the number of users is linear in its implementation complexity. The IGD algorithm make an effort to perform optimum MUD by updating one user's bit decision each iteration in the best way. This algorithm accelerates the gradient algorithm convergence by averaging. When a minimum mean square error (MMSE) MUD is employed to initialize the proposed algorithm, in all cases tested the gradient search converges to a solution with optimum performance. Further, the iterative tests denote that the proposed IGD algorithm provides significant performance for cases where other suboptimum algorithms perform poorly. Simulation compares the proposed IGD algorithm with the conventional detectors.
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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 (2006): 874–94. http://dx.doi.org/10.1134/s1064226906080055.

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Fey, Anne, Remco van der Hofstad, and Marten J. Klok. "Large deviations for eigenvalues of sample covariance matrices, with applications to mobile communication systems." Advances in Applied Probability 40, no. 04 (2008): 1048–71. http://dx.doi.org/10.1017/s0001867800002962.

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We study sample covariance matrices of the form W = (1 / n) C C T, where C is a k x n matrix with independent and identically distributed (i.i.d.) mean 0 entries. This is a generalization of the so-called Wishart matrices, where the entries of C are i.i.d. standard normal random variables. Such matrices arise in statistics as sample covariance matrices, and the high-dimensional case, when k is large, arises in the analysis of DNA experiments. We investigate the large deviation properties of the largest and smallest eigenvalues of W when either k is fixed and n → ∞ or k n → ∞ with k n = o(n / log log n), in the case where the squares of the i.i.d. entries have finite exponential moments. Previous results, proving almost sure limits of the eigenvalues, require only finite fourth moments. Our most explicit results for large k are for the case where the entries of C are ∓ 1 with equal probability. We relate the large deviation rate functions of the smallest and largest eigenvalues to the rate functions for i.i.d. standard normal entries of C . This case is of particular interest since it is related to the problem of decoding of a signal in a code-division multiple-access (CDMA) system arising in mobile communication systems. In this example, k is the number of users in the system and n is the length of the coding sequence of each of the users. Each user transmits at the same time and uses the same frequency; the codes are used to distinguish the signals of the separate users. The results imply large deviation bounds for the probability of a bit error due to the interference of the various users.
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Dissertations / Theses on the topic "Mobile communication systems. Code division multiple access"

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

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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.

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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.
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Irmer, Ralf. "Multiuser Transmission in Code Division Multiple Access Mobile Communications Systems." Doctoral thesis, Aachen : Shaker, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013194664&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Irmer, Ralf. "Multiuser Transmission in Code Division Multiple Access Mobile Communications Systems." Doctoral thesis, Technische Universität Dresden, 2004. https://tud.qucosa.de/id/qucosa%3A24546.

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Code Division Multiple Access (CDMA) is the technology used in all third generation cellular communications networks, and it is a promising candidate for the definition of fourth generation standards. The wireless mobile channel is usually frequency-selective causing interference among the users in one CDMA cell. Multiuser Transmission (MUT) algorithms for the downlink can increase the number of supportable users per cell, or decrease the necessary transmit power to guarantee a certain quality-of-service. Transmitter-based algorithms exploiting the channel knowledge in the transmitter are also motivated by information theoretic results like the Writing-on-Dirty-Paper theorem. The signal-to-noise ratio (SNR) is a reasonable performance criterion for noise-dominated scenarios. Using linear filters in the transmitter and the receiver, the SNR can be maximized with the proposed Eigenprecoder. Using multiple transmit and receive antennas, the performance can be significantly improved. The Generalized Selection Combining (GSC) MIMO Eigenprecoder concept enables reduced complexity transceivers. Methods eliminating the interference completely or minimizing the mean squared error exist for both the transmitter and the receiver. The maximum likelihood sequence detector in the receiver minimizes the bit error rate (BER), but it has no direct transmitter counterpart. The proposed Minimum Bit Error Rate Multiuser Transmission (TxMinBer) minimizes the BER at the detectors by transmit signal processing. This nonlinear approach uses the knowledge of the transmit data symbols and the wireless channel to calculate a transmit signal optimizing the BER with a transmit power constraint by nonlinear optimization methods like sequential quadratic programming (SQP). The performance of linear and nonlinear MUT algorithms with linear receivers is compared at the example of the TD-SCDMA standard. The interference problem can be solved with all MUT algorithms, but the TxMinBer approach requires less transmit power to support a certain number of users. The high computational complexity of MUT algorithms is also an important issue for their practical real-time application. The exploitation of structural properties of the system matrix reduces the complexity of the linear MUT mthods significantly. Several efficient methods to invert the ystem matrix are shown and compared. Proposals to reduce the omplexity of the Minimum Bit Error Rate Multiuser Transmission mehod are made, including a method avoiding the constraint by pase-only optimization. The complexity of the nonlinear methods i still some magnitudes higher than that of the linear MUT lgorithms, but further research on this topic and the increasing processing power of integrated circuits will eventually allow to exploit their better performance.<br>Der codegeteilte Mehrfachzugriff (CDMA) wird bei allen zellularen Mobilfunksystemen der dritten Generation verwendet und ist ein aussichtsreicher Kandidat für zukünftige Technologien. Die Netzkapazität, also die Anzahl der Nutzer je Funkzelle, ist durch auftretende Interferenzen zwischen den Nutzern begrenzt. Für die Aufwärtsstrecke von den mobilen Endgeräten zur Basisstation können die Interferenzen durch Verfahren der Mehrnutzerdetektion im Empfänger verringert werden. Für die Abwärtsstrecke, die höhere Datenraten bei Multimedia-Anwendungen transportiert, kann das Sendesignal im Sender so vorverzerrt werden, dass der Einfluß der Interferenzen minimiert wird. Die informationstheoretische Motivation liefert dazu das Writing-on-Dirty-Paper Theorem. Das Signal-zu-Rausch-Verhältnis ist ein geeignetes Kriterium für die Performanz in rauschdominierten Szenarien. Mit Sende- und Empfangsfiltern kann das SNR durch den vorgeschlagenen Eigenprecoder maximiert werden. Durch den Einsatz von Mehrfachantennen im Sender und Empfänger kann die Performanz signifikant erhöht werden. Mit dem Generalized Selection MIMO Eigenprecoder können Transceiver mit reduzierter Komplexität ermöglicht werden. Sowohl für den Empfänger als auch für den Sender existieren Methoden, die Interferenzen vollständig zu eliminieren, oder den mittleren quadratischen Fehler zu minimieren. Der Maximum-Likelihood-Empfänger minimiert die Bitfehlerwahrscheinlichkeit (BER), hat jedoch kein entsprechendes Gegenstück im Sender. Die in dieser Arbeit vorgeschlagene Minimum Bit Error Rate Multiuser Transmission (TxMinBer) minimiert die BER am Detektor durch Sendesignalverarbeitung. Dieses nichtlineare Verfahren nutzt die Kenntnis der Datensymbole und des Mobilfunkkanals, um ein Sendesignal zu generieren, dass die BER unter Berücksichtigung einer Sendeleistungsnebenbedingung minimiert. Dabei werden nichtlineare Optimierungsverfahren wie Sequentielle Quadratische Programmierung (SQP) verwendet. Die Performanz linearer und nichtlinearer MUT-Verfahren MUT-Algorithmen mit linearen Empfängern wird am Beispiel des TD-SCDMA-Standards verglichen. Das Problem der Interferenzen kann mit allen untersuchten Verfahren gelöst werden, die TxMinBer-Methode benötigt jedoch die geringste Sendeleistung, um eine bestimmt Anzahl von Nutzern zu unterstützen. Die hohe Rechenkomplexität der MUT-Algorithmen ist ein wichtiges Problem bei der Implementierung in Real-Zeit-Systemen. Durch die Ausnutzung von Struktureigenschaften der Systemmatrizen kann die Komplexität der linearen MUT-Verfahren signifikant reduziert werden. Verschiedene Verfahren zur Invertierung der Systemmatrizen werden aufgezeigt und verglichen. Es werden Vorschläge gemacht, die Komplexität der Minimum Bit Error Rate Multiuser Transmission zu reduzieren, u.a. durch Vermeidung der Sendeleistungsnebenbedingung durch eine Beschränkung der Optimierung auf die Phasen des Sendesignalvektors. Die Komplexität der nichtlinearen Methoden ist um einige Größenordungen höher als die der linearen Verfahren. Weitere Forschungsanstrengungen an diesem Thema sowie die wachsende Rechenleistung von integrierten Halbleitern werden künftig die Ausnutzung der besseren Leistungsfähigkeit der nichtlinearen MUT-Verfahren erlauben.
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Chen, Jun, and 陳軍. "Multicode CDMA for high-speed mobile communications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B30149903.

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Chen, Jun. "Multicode CDMA for high-speed mobile communications /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25151241.

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Seow, Tian Beng. "Circular antenna array applications in coded DS-CDMA mobile communication systems /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FSeow.pdf.

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Purle, David J. "Frequency hopped code division multiple access techniques for future wireless communications." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281833.

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Ng, Stewart Siew Loon. "Smart antenna in DS-CDMA mobile communication system using circular array /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FNg.pdf.

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Irmer, Ralf [Verfasser]. "Multiuser transmission in code division multiple access mobile communications Systems / Ralf Irmer." Aachen : Shaker, 2005. http://d-nb.info/975919288/34.

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

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

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

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

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Ramjee, Prasad, ed. Wideband CDMA for third generation mobile communications. Artech House, 1998.

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Elders-Boll, Harald. Sequenz-Design und Multiuser-Detektion für asynchrone Codemultiplex-Systeme. VDI Verlag, 1999.

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Tachikawa, Keiji. W-CDMA idō tsūshin hōshiki. Maruzen Kabushiki Kaisha, 2001.

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Aleksandar, Damnjanovic, and Vojcic Branimir, eds. The cdma2000® system for mobile communications. Prentice Hall PTR, 2004.

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3G yuan li, xi tong yu ying yong. Guo fang gong ye chu ban she, 2008.

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Peng, Mugen. Wu xian zi yuan guan li yu 3G wang luo gui hua you hua. Ren min you dian chu ban she, 2008.

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CDMA cellular mobile communications & network security. Prentice Hall PTR, 1998.

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

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Noneaker, Daniel L., and Michael B. Pursley. "Rake Reception for a CDMA Mobile Communication System with Multipath Fading." In Code Division Multiple Access Communications. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2251-5_10.

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Stüber, Gordon L. "Code Division Multiple Access." In Principles of Mobile Communication. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-6268-6_8.

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Torrieri, Don. "Code-Division Multiple Access." In Principles of Spread-Spectrum Communication Systems. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70569-9_7.

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Torrieri, Don. "Code-Division Multiple Access." In Principles of Spread-Spectrum Communication Systems. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9595-7_6.

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Torrieri, Don. "Chapter 7 Code-Division Multiple Access." In Principles of Spread-Spectrum Communication Systems. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14096-4_7.

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

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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.
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Li, Tianze, Tao Gao, Ye Liu, Yuhan Wang, and JiaHui Chen. "Monitoring and Optimization of Pilot Pollution in High-Rise." In Sustainable Infrastructure. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0948-7.ch005.

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With the development and construction of the city, more and more high-rise buildings, more and more intensive, urban high-rise building pilot pollution problems become more and more prominent, urgent technical researchers continue to optimize the current communication network solutions. CDMA (Code Division Multiple Access) system has great operating prospects, in the third generation of mobile communication development process, the network competitiveness, network operation quality put forward higher requirements. This paper first introduces the self-interference characteristic of CDMA network, first introduces the concept of pilot pollution for CDMA network. Secondly, from the causes of high-level pilot pollution problems, the solution of high-level pilot pollution concentration is put forward for different situations. Finally, the problem of high-level pilot pollution is further analyzed with practical examples.
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Berber, Stevan. "Orthogonal Frequency Division Multiplexing and Code Division Multiple Access Systems." In Discrete Communication Systems. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198860792.003.0008.

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Chapter 8 presents modern multi-user and multicarrier communication systems based on code division multiple access technology and orthogonal frequency division multiple access technology. Analogue, digital, and discrete orthogonal frequency division multiple access systems are presented separately and then inter-related from theoretical and practical points of view. A precise mathematical model of discrete baseband and intermediate-frequency blocks is presented, including procedures for signal mapping and the discrete Fourier transform, and then related to the model of an analogue radiofrequency block to make the whole orthogonal frequency division multiple access system. The basic theory of binary and non-binary code division multiple access systems operation is presented. To support deeper theoretical understanding of the design and operation of a code division multiple access system, one project in the supplementary material demonstrates the mathematical modelling, simulation, and design of this system in field-programmable gate array technology and presents the development tools required.
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9

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

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"Introduction to Spread Spectrum Communication Systems." In Theory of Code Division Multiple Access Communication. John Wiley & Sons, Inc., 2004. http://dx.doi.org/10.1002/047165549x.ch2.

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

1

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.

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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.

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Fines, P., P. Febvre, and E. Christofylaki. "Turbo-code division multiple access: capacity enhancement of mobile satellite systems using narrowband multiuser detection." In 2008 10th International Workshop on Signal Processing for Space Communications (SPSC). IEEE, 2008. http://dx.doi.org/10.1109/spsc.2008.4686700.

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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.

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5

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.

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Zamiri-Jafarian, Yeganeh, Saeed Gazor, and Hossein Zamiri-Jafarian. "Molecular code division multiple access in nano communication systems." In 2016 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, 2016. http://dx.doi.org/10.1109/wcnc.2016.7565087.

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Yan, Hui, Kun Qiu, and Yun Ling. "Beat Noise Analysis in Phase Encode Optical Code Division Multiple Access System Embedded Polarization." In 2009 WRI International Conference on Communications and Mobile Computing (CMC). IEEE, 2009. http://dx.doi.org/10.1109/cmc.2009.96.

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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.

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Khan, Muhammad Zahid, and Haroon-Ur-Rashid. "Linear Multiuser Detection in Code Division Multiple Access CDMA - Systems for Wireless Communication." In 2005 Student Conference on Engineering Sciences and Technology. IEEE, 2005. http://dx.doi.org/10.1109/sconest.2005.4382889.

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Oh, Yong-il, Chung Sang Lyu, Seong Teak Oh, and Jin Young Kim. "Compatibility Analysis between Wideband Code Division Multiple Access (WCDMA) Service and Global Mobile Personal Communication by Satellite (GMPCS)." In 2008 10th International Conference on Advanced Communication Technology. IEEE, 2008. http://dx.doi.org/10.1109/icact.2008.4493742.

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