DocumentCode :
3430868
Title :
Suppression of narrow-band interference and multipath by spread-spectrum receiver using decision-feedback filters
Author :
Ogawa, Toshiaki ; Sasase, Iwao ; Mori, Shinsaku
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fYear :
1991
fDate :
9-10 May 1991
Firstpage :
673
Abstract :
The performance of a differential phase-shift-keying (DPSK) direct-sequence (DS) spread-spectrum receiver using decision-feedback (DF) filters in the presence of narrowband interference and multipath is considered. First, the general analytic expressions for the optimum tap weights of the DF filters and minimum mean square errors are obtained. Next, the authors calculate the output signal-to-noise ratio (SNR) of the system having the optimum tap weights. The authors also consider the bit-error-rate (BER) by computer simulation. Finally, the adaptive DF filters using a recursive least squares (RLS) algorithm are considered. It is found that the two-sided DF filter is superior for suppressing both interference and multipath in the spread-spectrum system. The authors also find that the adaptive DF filter using the RLS algorithm has rapid convergence
Keywords :
adaptive filters; feedback; filtering and prediction theory; interference suppression; phase shift keying; radio receivers; radiofrequency interference; spread spectrum communication; BER; DPSK direct sequence receiver; RLS algorithm; SNR; adaptive filters; bit-error-rate; decision-feedback filters; differential phase-shift-keying; minimum mean square errors; multipath propagation suppression; narrowband interference suppression; optimum tap weights; output signal-to-noise ratio; rapid convergence; recursive least squares; spread-spectrum receiver; Adaptive filters; Bit error rate; Differential quadrature phase shift keying; Interference suppression; Mean square error methods; Narrowband; Phase shift keying; Resonance light scattering; Signal to noise ratio; Spread spectrum communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, Computers and Signal Processing, 1991., IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-87942-638-1
Type :
conf
DOI :
10.1109/PACRIM.1991.160829
Filename :
160829
Link To Document :
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