asynchronous DS CDMA systems
Accurate BER Analysis of QPSK Modulated Asynchronous DS CDMA Systems Communicating over Rayleigh Channels
... of asynchronous DS-CDMA systems using random spreading se- quences and QPSK modulation for transmission over Rayleigh channels is an open ...existing systems [27], we will extend the ...
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A Unified Exact BER Performance Analysis of Asynchronous DS CDMA Systems Using BPSK Modulation over Fading Channels
... of asynchronous DS- CDMA systems using BPSK modulation for transmissions over Rayleigh, Ricean, Hoyt and Nakagami- m fading ...general asynchronous DS- CDMA system using ...
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Exact BER Performance of Asynchronous DS CDMA Systems using Quadriphase Spreading and QPSK Modulation over Rayleigh Channels
... modulated DS-CDMA systems the in- phase and quadrature-phase components are spreaded sep- arately ...W-CDMA systems [13], ...in asynchronous DS-CDMA systems ...
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Accurate BER Analysis of Asynchronous DS CDMA Systems in Ricean Channels
... of asynchronous Ricean-faded DS-CDMA systems using random spreading [2]–[17], [19], [20] sequences is still an open ...for asynchronous DS-CDMA systems in a Ricean ...
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Exact BER Calculation of Asynchronous DS CDMA Systems Communicating over Hoyt Channels
... As far as the authors are aware, there are no studies on the exact BER analysis of asynchronous DS-CDMA systems using random spreading sequences communicating over Hoyt channels. The Hoyt ...
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Computationally Efficient Blind Code Synchronization for Asynchronous DS CDMA Systems with Adaptive Antenna Arrays
... proposed asynchronous DS- CDMA time-delay detector is developed that utilizes the con- cept of the multistage reduced-rank Wiener ...new DS-CDMA detector does not require the stringent ...
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Bit Error Performance for Asynchronous Ds Cdma Systems Over Multipath Rayleigh Fading Channels (RESEARCH NOTE)
... of CDMA in mobile ...for asynchronous direct–sequence code division multiple–access (DS/CDMA) systems by modeling the multiple access interference (MAI) as an improved Gaussian ...
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On the Performance of Band Limited Asynchronous DS CDMA over Nakagami m Channels
... of CDMA based communications [2], numerous valuable studies have been conducted [3]–[7] for the sake of finding various attractive chip ...a DS-CDMA system, when they occupy the same ...
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Accurate Bit Error Rate Calculation for Asynchronous Chaos-Based DS-CDMA over Multipath Channel
... (DSSS) systems was also reported on the code level [12, ...that systems using the periodic quantized sequences have larger capacities and lower bit-error rates than those using m-sequences and Gold ...
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Adaptive Iterative Soft Input Soft Output Parallel Decision Feedback Detectors for Asynchronous Coded DS CDMA Systems
... coded DS-CDMA systems in order to avoid the need for the a priori information about system parameters, such as multiple users’ spreading codes and relative delays between ...
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An Iterative Multiuser Detector for Turbo-Coded DS-CDMA Systems
... We propose an iterative multiuser detector for turbo-coded synchronous and asynchronous direct-sequence CDMA (DS-CDMA) systems. The receiver is derived from the maximum a posteriori ...
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Accurate BER of MC DS CDMA over Rayleigh Fading Channels
... of DS-CDMA with random sequences in Rayleigh [6] and Nakagami-fading [7] ...of DS-CDMA systems over Rician [8] and Nakagami-fading [9] ...MC-DS-CDMA systems with ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... The choice of code greatly depends on the scenario and is se- lected based on its orthogonality, correlation properties, im- plementation complexity and PAPR [4, 12]. Walsh-Hadamard codes are simple to generate ...
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Space-Time Joint Interference Cancellation Using Fuzzy-Inference-Based Adaptive Filtering Techniques in Frequency-Selective Multipath Channels
... In the present paper, an adaptive robust MMSE array- receiver is proposed based on a fuzzy-logic controlled LMS or RLS algorithm for space-time joint asynchronous DS-CDMA signals. The FLC system is ...
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Blind Multiuser Detection by Kurtosis Maximization for Asynchronous Multirate DS/CDMA Systems
... technical papers. His current research interests include signal pro- cessing for wireless communications, and statistical signal process- ing. He is a Senior Member of IEEE. He has been a Technical Pro- gram Committee ...
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Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems
... In this paper, we consider techniques for tracking the de- lay of a received signal component when spatial transmit di- versity is employed. Closed loop synchronization techniques are generally used for this purpose. The ...
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Ant Colony Based Multiuser Detection for MC DS CDMA Systems
... MC DS-CDMA ...communication systems. In this contribution we extend the ACO based single-carrier DS-CDMA system’s MUD of [22] to a multi- carrier DS-CDMA system ...MC ...
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Adaptive Rate DS CDMA Systems using Variable Spreading Factors
... a DS-CDMA system is a time-varying random variable and when the conventional matched filter-based receiver is employed, an adaptive rate-transmission scheme using VSFs can be employed for compensating the ...
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Nonlinear Multiuser Receiver for Optimized Chaos-Based DS-CDMA Systems
... conventional DS-CDMA systems, chaos- based CDMA systems suffer from multi-user interference (MUI) due to other users transmitting in the ...chaos-based DS-CDMA ...
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Analysis, Design, and Test of CDMA LFSR with Offset Mask Using Standard ICs
... Finite fields provide the necessary theory in designing LFSR [6] [7]. From a primitive polynomial, the equiva- lent circuit can be modeled with electronic components such as flip flops and XOR gates; each monomial indi- ...
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