Title :
Evaluation of predetection diversity techniques for RAKE receivers
Author :
Wong, Richard S C ; Annamalai, A., Jr. ; Bhargava, Vijay K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
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
Keywords :
access protocols; code division multiple access; diversity reception; fading; multipath channels; pseudonoise codes; radio receivers; signal detection; spread spectrum communication; DS-CDMA; RAKE receivers; decayed multipath intensity profile; direct path component; fading environments; finite tap decisions; optimum linear diversity combiner; performance; predetection diversity techniques; preselection maximal ratio combiner; receiver performance; specular component; Degradation; Delay estimation; Demodulation; Diversity reception; Fading; Fingers; Interference; Multipath channels; Performance analysis; RAKE receivers;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.619942
