Title :
Analysis of multilevel-quantized soft-limiting detector for an FH-SSMA system
Author :
Weng, Jian E. ; Xue, Guo Q. ; Le-Ngoc, Tho ; Tahar, Sofiène
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
In this paper, a multilevel-quantized soft-limiting (SL-MQ) detector for frequency hopping spread spectrum multiple access (FH-SSMA) systems is proposed and analyzed. Numerical and simulation results in frequency selective Rayleigh fading channels show that compared to the hard-limiting (HL) detector, the new SL-MQ with M=4 can improve the system capacity by almost 10% at the bit error rate level of 10-3 . Furthermore, the performance of the SL-MQ has low sensitivity to the optimum value of the amplitude threshold so that it can tolerate an inaccurate estimate of the optimum in practice
Keywords :
Rayleigh channels; error statistics; frequency hop communication; multi-access systems; signal detection; spread spectrum communication; FH-SSMA system; SL-MQ detector; amplitude threshold; bit error rate; frequency hopping spread spectrum multiple access; frequency selective Rayleigh fading channels; multilevel-quantized soft-limiting detector; numerical results; simulation results; system capacity; Amplitude estimation; Bit error rate; Computational modeling; Detectors; Diversity reception; Fading; Frequency estimation; Multiple access interference; Numerical simulation; Spread spectrum communication;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853723
