Title :
Finite-data-record performance/breakdown analysis of the "blind" space-time DS-CDMA RAKE-receiver of Wong-Lok-Lehnert-Zoltowski
Author :
Tichavský, Petr ; Wong, Kainam Thomas
Author_Institution :
Inst. of Inf. Theor. & Autom., Praha, Czech Republic
Abstract :
Herein presented is a finite-data-record performance analysis of a "blind" space-time RAKE-receiver algorithm previously proposed by Wong, Lok, Lehnert & Zoltowski (WLLZ) [T.F. Wong, T.M. Lok, J.S. Lehnert & M.D. Zoltowski, 1998] for uplink DS-CDMA cellular radiowave wireless communications using only single-user-type "conventional" detectors. Derived are two approximations of the detector\´s finite sample mean output-SINR. This analysis reveals how the output-SINR depends on the multi-user access cellular system\´s various system parameters, and the fading-channel\´s delay spread and temporal variability. Simulations confirm this analysis\´ validity, except when the detector breaks down in certain small-sample-support situations. Such breakdown is further shown to be alleviated by overlapping time-segments in the estimation of the covariance matrix of the interference-plus-noise delay-segments of the despread signal.
Keywords :
cellular radio; code division multiple access; covariance matrices; fading channels; radio receivers; spread spectrum communication; blind space-time RAKE-receiver algorithm; covariance matrix; detectors; direct sequence code division multiple access; fading-channel; finite sample mean output-SINR; finite-data-record performance analysis; multiuser access cellular system; uplink DS-CDMA cellular radiowave wireless communications; Algorithm design and analysis; Array signal processing; Delay estimation; Detectors; Electric breakdown; Frequency estimation; Information analysis; Interference; Multiaccess communication; Performance analysis;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204059
