Title :
A recent subspace-based approach to joint detection and time-delay estimation in DS-CDMA systems
Author_Institution :
Dept. of Appl. Electron., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
This paper presents a novel method for jointly estimating the time-delay parameters and detecting the transmitted symbols in a DS-CDMA system. A short training sequence is used to get an initial estimate of the time-delay, which is consequently used to detect the symbols. The method then iterates while exploiting the signal structure, to improve the performance. Simulation results are presented to compare the algorithm with the decorrelating criterion and the matched-filter receiver in terms of bit-error rate, and with the MUSIC algorithm and the sliding correlator in terms of the variance of the time-delay estimates
Keywords :
code division multiple access; delays; error statistics; parameter estimation; pseudonoise codes; signal detection; spread spectrum communication; DS-CDMA systems; MUSIC algorithm; bit-error rate; codes sequences; decorrelating criterion; initial estimate; joint detection; matched-filter receiver; performance; short training sequence; signal structure; simulation results; sliding correlator; subspace-based approach; time-delay estimates variance; time-delay estimation; time-delay parameters; transmitted symbols detection; Baseband; Bit error rate; Correlators; Decorrelation; Delay effects; Frequency division multiaccess; Multiaccess communication; Multiple signal classification; Parameter estimation; Time division multiple access;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679548
