Evaluation of predetection diversity techniques for RAKE receivers

TitleEvaluation of predetection diversity techniques for RAKE receivers
Publication TypeConference Paper
Year of Publication1997
AuthorsWong, R. S. C., J. Annamalai, A., and V. K. Bhargava
Conference NameCommunications, Computers and Signal Processing, 1997. '10 Years PACRim 1987-1997 - Networking the Pacific Rim'. 1997 IEEE Pacific Rim Conference on
Pagination227 -230 vol.1
Date Publishedaug.
Keywordsaccess protocols, code division multiple access, decayed multipath intensity profile, direct path component, diversity reception, DS-CDMA, fading, fading environments, finite tap decisions, multipath channels, optimum linear diversity combiner, performance, predetection diversity techniques, preselection maximal ratio combiner, pseudonoise codes, radio receivers, RAKE receivers, receiver performance, signal detection, specular component, spread spectrum communication

This paper extends the results presented by Eng, Kong and Milstein (see IEEE Trans. Commun., vol.44, p.1117-29, 1996) to include the presence of a direct-path component, and subsequently, to investigate the efficacy of an Mth order pre-selection maximal-ratio combiner (M-SCMRC) in different fading environments. The performance of a maximal-ratio combiner with finite tap decisions (M-MRC), and the optimum linear diversity combiner (L-MRC) which combines all the L resolvable multipaths, is also evaluated for comparison. The results reveal that M-SCMRC outperforms M-MRC, although the combination of a strong specular component and a heavily decayed multipath intensity profile may result in only a minimal degradation of the receiver performance for an M-MRC RAKE receiver


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