Title :
Robust adaptive multiuser detection for CDMA frequency-selective fading channels
Author :
Zhou, Hongwei ; Xiao, Pei ; Cowan, Colin
Author_Institution :
Dept. of Civil Eng., Imperial Coll. London, London, UK
Abstract :
Robust adaptive multiuser detection schemes are developed for direct-sequence code-division multiple-access (DS-CDMA) multipath frequency-selective fading channels. Multiple access interference (MAI) and intersymbol interference (ISI) are presented in identical format in the expanded signal subspace, which provides convenience for symbol-by-symbol multiuser detection. The proposed multiuse detectors are designed in the expanded signal subspace, and subspace estimation and Kalman filtering algorithms are developed for their adaptive implementation. It is demonstrated by simulation that these adaptive detectors are robust against subspace estimation error and can effectively suppress both MAI and ISI and converge to the optimum SINR.
Keywords :
Kalman filters; code division multiple access; fading channels; intersymbol interference; multiuser detection; CDMA frequency-selective fading channels; Kalman filtering algorithms; direct-sequence code-division multiple-access; intersymbol interference; multiple access interference; robust adaptive multiuser detection; symbol-by-symbol multiuser detection; Adaptive signal detection; Algorithm design and analysis; Detectors; Frequency-selective fading channels; Intersymbol interference; Multiaccess communication; Multiple access interference; Multiuser detection; Robustness; Signal design;
Conference_Titel :
Ultra Modern Telecommunications & Workshops, 2009. ICUMT '09. International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4244-3942-3
Electronic_ISBN :
978-1-4244-3941-6
DOI :
10.1109/ICUMT.2009.5345373