Title :
Comparison of MUSIC and matched filter delay estimators in DS-CDMA
Author :
Luukkanen, Petteri ; Joutsensalo, Jyrki
Author_Institution :
Nokia Res. Center, Espoo, Finland
Abstract :
This paper focuses on the initial code phase estimation, also called acquisition, in the asynchronous multiuser CDMA system. The performance of the subspace-based MUSIC (Multiple Signal Classification) estimator is compared to the conventional matched filter. Simulation results for a communication system with ten users each having a 2-path Rayleigh fading channel and raised-cosine shaped chip waveform are presented. It is shown that the celebrated near-far resistance and the overall performance of MUSIC is maintained only at the signal-to-noise ratios higher than normally realizable in practical systems
Keywords :
Rayleigh channels; code division multiple access; delays; fading; filtering theory; land mobile radio; matched filters; multipath channels; phase estimation; spread spectrum communication; 2-path Rayleigh fading channel; DS-CDMA; asynchronous multiuser CDMA system; communication system; initial code phase estimation; matched filter delay estimators; multiple signal classification; near-far resistance; performance; raised-cosine shaped chip waveform; signal-to-noise ratios; simulation results; subspace-based MUSIC estimator; third generation mobile communication system; Delay estimation; Fading; Matched filters; Multiaccess communication; Multiple signal classification; Phase estimation; Propagation delay; Pulse shaping methods; Radio transmitters; Signal to noise ratio;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.627002
