asynchronous multiuser CDMA detection
Genetic Algorithm Assisted Multiuser Detection for Asynchronous Multicarrier CDMA
... ML detection based MUD designed for MC-CDMA is capable of achieving the optimum perfor- ...ML detection based MUD’s complexity will increase ex- ponentially with the number of users K ...ML ...
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Blind Multiuser Detection by Kurtosis Maximization for Asynchronous Multirate DS/CDMA Systems
... For multirate DS/CDMA systems, discrete-time multi- ple-input multiple-output (MIMO) signal models can be formulated through chip-rate sampling of the received continuous-time signal followed by polyphase ...
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Burst by Burst Adaptive Multiuser Detection CDMA: A Framework for Existing and Future Wireless Standards
... an asynchronous system, where the outputs from a matched filter bank were fed into a detector that performed MAI cancellation using a multistage ...group detection scheme for Gaussian channels [65], and ...
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Timing Free Blind Multiuser Detection for Multicarrier DS/CDMA Systems with Multiple Antennae
... with asynchronous cochannel inter- ference (whether from the same cell or from nearby cells); thus differential encoding-decoding is assumed, as a result of the lack of a phase ...
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Combined error correction and multiuser detection for Rayleigh fading synchronous CDMA channel
... complexity multiuser detectors using coding over the Rayleigh fading channel for dierent noise and MAI conditions; namely the conventional detector, the decorrelator, and the two-stage detectors with the con- ...
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Adaptive DS/CDMA Non Coherent Receiver using MULTIUSER DETECTION Technique
... data detection in DS-CDMA systems is proposed in this ...non-coherent detection compared with conventional coherent detection is limited and can be adjusted via the generation of the reference ...
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Blind Direct Multiuser Detection for Uplink MC CDMA: Performance Analysis and Robust Implementation
... joint multiuser de- tection and equalization in asynchronous DS-CDMA sys- tems, a direct MUD technique is proposed in [14], where the detector’s parameters are extracted from the received data ...
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Genetic Algorithm Assisted Multiuser Detection in Asynchronous CDMA Communications
... optimum multiuser detector for code-division mul- tiple-access (CDMA) systems [1], which is based on the maximum-likelihood sequence-estimation (MLSE) rule, searches exhaustively for the specific ...
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Single and Multi Carrier DS CDMA: Multi USer Detection, Space Time Spreading, Synchronisation, Standards and Networking
... for asynchronous transmissions in a Gaussian channel ...optimum multiuser detector. A further sub-optimum multiuser detector investigated was the minimum mean square error (MMSE) detector, where a ...
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Genetic Algorithm Assisted Multiuser Detection in Asynchronous CDMA Communications
... Proposed GA-based detector using strategy S1 Proposed GA-based detector using strategy S2 Single-user bound Conventional, 2-path rake combining.. Bit Error Probability BEP.[r] ...
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Sphere Decoding for Space time Multiuser Detection in STBC DS CDMA System
... space-time multiuser detection algorithm in our system and classical decorrelating multiuser detection algorithm in one-antenna system are showed in ...
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On the Uplink Performance of Asynchronous LAS CDMA
... of asynchronous uplink ...in asynchronous scenarios. Hence tra- ditional DS-CDMA cellular systems are interference limited and suffer from the so-called ’near-far’ effects, unless complex interference ...
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Turbo multiuser detection with integrated channel estimation for differentially coded CDMA systems.
... direct-sequence CDMA (DS-CDMA) is studied since it is deemed to be more suitable for mobile communications [31], ...ata detection for each user is accomplished independently of th a t performed on ...
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Coded Modulation Assisted Genetic Algorithm Based Multiuser Detection for CDMA Systems
... In an effbrt to increase the system's performance with the aid of channel coding, but without increasing the required bandwidth, in this contribution we will investigate the performance [r] ...
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Optimum Detection of CDMA
... Cn,i) i.e. summation of differential PAM modulated by carrier plus a tone for data clock and carrier recovery. If for an user the data to be transmitted is {1, -1, -1, 1, 1, -1.), then after encoding it will be {1, -1, ...
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Antenna Diversity Assisted Genetic Algorithm Based Multiuser Detection Schemes for Synchronous CDMA Systems
... posed multiuser detector against several conventional multiuser detectors, namely, that of the single-user correlator [12], the decorrelator [1], and the optimum multiuser detector [1], in terms of ...
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M ary Coded Mouldation Assisted Genetic Algorithm Based Multiuser Detection for CDMA Systems
... shown in Figure 2 for AWGN channel and Figure 3 for un- correlated Rayleigh fading channel, are identical to that of the BPSK modulation. However, the orthogonality ofthe in-phase and quadrature-phase BPSK signals is ...
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Multiuser Detection in Multicarrier CDMA Systems Employing Both Time Domain and Frequency Domain Spreading
... advanced multiuser detection algorithms becomes impractical owing to their high ...that multiuser detection can be carried out sepa- rately in the T-domain and F-domain, while achieving a ...
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Joint Performance Study of Channel Estimation and Multiuser Detection for Uplink Long Code CDMA Systems
... and multiuser receivers for long-code uplink CDMA ...downlink CDMA systems [30], long-code uplink communications adopt completely differ- ent channel estimation and symbol detection schemes and ...
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Power Controlled CDMA Cell Sectorization with Multiuser Detection: A Comprehensive Analysis on Uplink and Downlink
... the CDMA cell, that is, increasing the number of simultaneous users that achieves their quality of service ...and multiuser detection, and by designing variable width sectors that lead to the ...
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