Title :
Quantization effects on the acquisition performance of direct-sequence spread-spectrum CDMA
Author :
Nahm, Seunghyeon ; Sung, Wonyong
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
fDate :
29 Sep-2 Oct 1996
Abstract :
The effects of a limited wordlength and the saturation for the hardware implementation of direct-sequence spread-spectrum CDMA systems are stochastically analyzed. The distortion due to saturation is signal dependent, and causes very different effects when compared with that of the finite wordlength. Numerical results are obtained to show the optimum saturation limit of the quantizer for a given wordlength. This analysis can give a guide to low-cost digital implementations and assurance of the system performance without intensive simulations
Keywords :
code division multiple access; pseudonoise codes; quantisation (signal); signal detection; spread spectrum communication; stochastic processes; DS-SS CDMA; acquisition performance; direct-sequence spread-spectrum CDMA; hardware implementation; limited wordlength effects; low-cost digital system implementations; optimum saturation limit; quantization effects; signal dependent distortion; system performance; Costs; Delay; Filters; Interference; Multiaccess communication; Probability distribution; Quantization; Spread spectrum communication; Timing; Uncertainty;
Conference_Titel :
Universal Personal Communications, 1996. Record., 1996 5th IEEE International Conference on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-3300-4
DOI :
10.1109/ICUPC.1996.562668
