Title :
A fuzzy logic interference suppression algorithm for DS-SS communications
Author :
Naidoo, C. ; Van Rooyen, P.G.W.
Author_Institution :
Eskom Transmission, Germiston, South Africa
Abstract :
New techniques to suppress narrow-band and multiple-access interference for spread-spectrum (SS) systems are continually being researched for use in the growing cellular CDMA market. This paper investigates the feasibility of using a fuzzy logic technique to adapt the MMSE detector for the suppression of narrow-band interference (NBI). The fuzzy logic adaptation (FLA) technique is described and its performance is compared to the least-mean-square (LMS) and the recursive-least-square (RLS) adaptive algorithms. It is found that the fuzzy logic technique considered gives a performance improvement over the conventional and adaptive algorithm, while it fails to match the performance of the RLS adaptive algorithm
Keywords :
cellular radio; code division multiple access; fuzzy logic; interference suppression; least mean squares methods; spread spectrum communication; DS-SS communications; LMS; MMSE detector; RLS; cellular CDMA; fuzzy logic adaptation; interference suppression; least-mean-squares adaptive algorithm; multiple-access interference; narrowband interference; performance; recursive-least-squares adaptive algorithm; spread-spectrum systems; Adaptive algorithm; Detectors; Fuzzy logic; Interference suppression; Least squares approximation; Multiaccess communication; Multiple access interference; Narrowband; Resonance light scattering; Spread spectrum communication;
Conference_Titel :
Communications and Signal Processing, 1998. COMSIG '98. Proceedings of the 1998 South African Symposium on
Conference_Location :
Rondebosch
Print_ISBN :
0-7803-5054-5
DOI :
10.1109/COMSIG.1998.736920
