Title :
Combined adaptive RAKE diversity (ARD) and coding for DPSK DS/CDMA mobile radio
Author :
Higashi, Akihiro ; Matsumoto, Tadashi
Author_Institution :
NTT Mobile Commun. Network Inc., Kanagawaken, Japan
fDate :
9/1/1993 12:00:00 AM
Abstract :
A diversity combining scheme, adaptive RAKE diversity (ARD), is proposed for a differential phase-shift keying (DPSK) direct sequence code division multiple access (DS/CDMA) mobile communications system. The ARD scheme minimizes the mean squared errors in the diversity combiner output. This suppresses the effects of the interference only paths in the time window for path diversity combining. Bit error rate (BER) performances with the proposed ARD and conventional equal gain combining (EGC) schemes are evaluated through laboratory experiments and compared. Block error rate (BKER) performance with the ARD scheme is also evaluated experimentally. Based upon the BKER evaluation results, an error correction scheme is proposed that is suitable for error occurrence characteristics of ARD output
Keywords :
code division multiple access; diversity reception; encoding; error correction codes; interference suppression; mobile radio systems; phase shift keying; spread spectrum communication; ARD scheme; BER; BKER; DPSK DS/CDMA mobile radio; adaptive RAKE diversity; bit error rate; block error rate; coding; differential phase-shift keying; direct sequence code division multiple access; diversity combining scheme; equal gain combining; error correction scheme; interference suppression; path diversity; Bit error rate; Differential phase shift keying; Differential quadrature phase shift keying; Direct-sequence code-division multiple access; Diversity reception; Error correction; Interference suppression; Mobile communication; Multiaccess communication; Performance evaluation;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
