DS/CDMA signal detection
A Low Complexity Joint Synchronization and Detection Algorithm for Single Band DS CDMA UWB Communications
... In many signal processing problems, the rank of the co- variance matrix is full or close to being full, leading to slow convergence of the RLS algorithm. If this is the case, the non- recursive implementation is ...
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Timing Free Blind Multiuser Detection for Multicarrier DS/CDMA Systems with Multiple Antennae
... large signal-to-noise ratio regime, the length of the training phase should be in the order of the number of transmit antennae; (c) in the region of low signal-to-noise ratios, about half the transmission ...
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A Joint Optimization Criterion for Blind DS-CDMA Detection
... WCDMA-3GPP signal transmitted at ...in DS-CDMA systems, while Section 3 shows how the code of the desired user can be used to constrain the extraction ...
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Blind Multiuser Detection by Kurtosis Maximization for Asynchronous Multirate DS/CDMA Systems
... multiuser detection of single- rate direct-sequence/code-division multiple-access (DS/CDMA) systems and blind source separation (or independent component ...multiuser detection for multirate ...
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Multiuser Detection for Synchronous DS-CDMA in AWGN Channel
... current CDMA receivers are based on conventional detector, also known as matched filter ...the signal timing is needed in order to implement this ...
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Sphere Decoding for Space time Multiuser Detection in STBC DS CDMA System
... C can be seen as a channel matrix with K sender antennas and N receiver antennas. And each element in user bit data B can be seen as a NPSK modulation symbol with the value of either +1 or -1. Therefore, the received ...
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Blind linear multiuser detection for DS-CDMA wireless networks
... • C h a p te r 7: C o n str a in e d C M A -b a sed C o d e A c q u is itio n S c h e m e Unlike Chapter 3 to 6, the focus of Chapter 7 is on the problem of code acquisition, or the estimation of time delay of the ...
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Adaptive Minimum BER Linear Multiuser Detection for DS CDMA Signals in Multipath Channels
... adaptive signal processing and estimation theory and in their application to radar, audio, and communications ...on signal processing, and has published over 150 research ...
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Ant Colony Based Multiuser Detection for MC DS CDMA Systems
... (MC DS-CDMA) is widely recognized as a high-flexibility multiple-access ...single-carrier DS-CDMA and frequency (F)- domain spread multicarrier CDMA (MC-CDMA) operating without ...
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Performance and Analysis of DS CDMA Rake Receiver
... respectively, CDMA uses all of the available time-frequency space. One form of CDMA called Direct Sequence CDMA (DS-CDMA) uses a set of unique signature sequence or spreading codes to ...
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Adaptive DS/CDMA Non Coherent Receiver using MULTIUSER DETECTION Technique
... data detection in DS-CDMA systems is proposed in this ...desired signal and code delay by LMS algorithm at the same ...non-coherent detection compared with conventional coherent ...
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Blind Joint Soft Detection Assisted Slow Frequency Hopping Multicarrier DS CDMA
... Let the first user be the user of interest and consider the con- ventional matched filter-based RAKE receiver with MRC, as shown in Fig. 2, where the superscript and subscript of the refer- ence user’s signal has ...
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Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels
... patterns, detection can be implemented by demodulating only the active ...SFH/MC DS-CDMA system has a similar complexity to that of the corresponding conventional MC DS-CDMA system ...
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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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Blind Soft Detection Assisted Frequency Hopping Multicarrier DS CDMA Systems
... 3, for the SFH/MC DS-CDMA system using a constant-weight code CQ; 2v; U in order to activate the subcarriers and using a receiver without the explicit knowledge of the FH pattern - exce[r] ...
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A Unified Exact BER Performance Analysis of Asynchronous DS CDMA Systems Using BPSK Modulation over Fading Channels
... binary DS-CDMA system using random spreading sequences is considered when communicating over various fading ...high Signal-to-Noise Ratios (SNR) and for a low number of ...
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Analysis, Design, and Test of CDMA LFSR with Offset Mask Using Standard ICs
... Hardware implementation of Linear Feedback Shift Register (LFSR) plays a great and very impor- tant role in communication systems, and in many security devices. In this paper, a design of LFSR with offset mask has been ...
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Study and analysis the BER performance of linear multiuser detectors in non-Gaussian noise channel
... received signal as shown in figure ...time signal to the discrete time statistics sampled at chip rate without sacrifices information relevant to ...multiuser detection algorithm for optimality ...
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Performance of MMSE Multiuser Detection in Cellular DS CDMA Systems Using Distributed Antennas
... The bit error rate BER performance of the distributed antenna cellular DS-CDMA system is investigated, when minimum mean-square error MMSE multiuser detection is employed, and when trans[r] ...
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Signal Processing by Generalized Receiver in DS-CDMA Wireless Communication Systems with Optimal Combining and Partial Cancellation
... of DS-CDMA system with multipath fading channel employing GR based on GASP [1–5], where the lower and upper boundary values of the PCF can be explicitly calculated from the processing gain and the number of ...
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