Title :
Spread spectrum PR-QMF transmultiplexer codes for CDMA communications
Author :
Akansu, Ali N. ; Lin, Xueming ; Tazebay, M.V.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
Orthogonal transmultiplexers have been successfully utilized for multiple access communications. They are of FDMA type in their most common version. The frequency selective PR-QMFs were used in transmultiplexers for CDMA communications reported in the literature. This conflicts with the fundamentals of CDMA theory. We introduce novel spread spectrum PR-QMF codes. It is shown that the spread spectrum PR-QMF codes with minimized auto- and cross-correlation properties drastically outperform the conventional Gold (1967) codes in CDMA communication scenarios considered
Keywords :
band-pass filters; code division multiple access; codes; correlation methods; filtering theory; quadrature mirror filters; signal reconstruction; spread spectrum communication; transmultiplexing; CDMA communications; FDMA; Gold codes; autocorrelation properties; cross-correlation properties; frequency selective PR-QMF; multiple access communications; orthogonal transmultiplexers; perfect reconstruction filter banks; spread spectrum PR-QMF transmultiplexer codes; Bit error rate; Frequency conversion; Frequency division multiaccess; Frequency domain analysis; Gold; Multiaccess communication; Multiple access interference; OFDM modulation; Signal processing; Spread spectrum communication;
Conference_Titel :
Digital Signal Processing Workshop Proceedings, 1996., IEEE
Conference_Location :
Loen
Print_ISBN :
0-7803-3629-1
DOI :
10.1109/DSPWS.1996.555472
