Title :
The effect of signal quantization on the performance of DS/SS-CDMA demodulators
Author :
De Gaudenzi, R. ; Giannetti, F. ; Luise, M.
Author_Institution :
European Space Agency, Eur. Space Res. & Technol. Centre, Noordwijk, Netherlands
fDate :
28 Nov- 2 Dec 1994
Abstract :
The dramatic performance improvements lately experienced by application-specific integrated circuits (ASICs) let us envisage a single-chip all-digital implementation of a data modem for direct-sequence spread spectrum (DS/SS) code-division multiple access (CDMA) systems. In this respect, it is of interest to represent the signals in the digital domain with a small number of bits. On the other hand, it is known that coarse signal quantization may cause a significant bit error rate (BER) performance degradation. This paper investigates on the impact of signal quantization on the BER performance of a DS/SS CDMA receiver in the presence of Gaussian noise and cochannel interference. Based on a general theoretical analysis, a few multiple access strategies are taken into consideration, and some simple design hints are derived and verified by computer simulation
Keywords :
Gaussian noise; application specific integrated circuits; cochannel interference; code division multiple access; coding errors; error statistics; modems; pseudonoise codes; quantisation (signal); radio receivers; spread spectrum communication; ASIC; BER performance; DS/SS CDMA receiver; DS/SS-CDMA demodulators; Gaussian noise; application-specific integrated circuits; bit error rate; cochannel interference; code-division multiple access; computer simulation; data modem; digital signals; direct-sequence spread spectrum; multiple access strategies; performance; signal quantization; signal representation; single-chip all-digital implementation; Application specific integrated circuits; Bit error rate; Computer simulation; Degradation; Gaussian noise; Interchannel interference; Modems; Multiaccess communication; Quantization; Spread spectrum communication;
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
DOI :
10.1109/GLOCOM.1994.512807
