Title :
Fundamental BER-floor for long-code CDMA
Author :
Rasmussen, Lars K. ; Lim, Teng J. ; Sugimoto, Hiroki
Author_Institution :
Centre for Wireless Commun., Singapore
Abstract :
In a discrete-time realisation of a long-code CDMA system, a non-zero probability of encountering a singular channel (linear dependency among spreading codes) leads to an inherent error floor at high SNR. In this paper we derive a lower bound on this error floor for a synchronous CDMA system in AWGN. The lower bound is found to correspond closely to the error floor encountered by the full-complexity maximum-likelihood detector
Keywords :
AWGN channels; code division multiple access; computational complexity; error statistics; maximum likelihood detection; receivers; synchronisation; AWGN; discrete-time realisation; full-complexity maximum-likelihood detector; fundamental BER-floor; linear dependency; long-code CDMA; singular channel; spreading codes; synchronous CDMA system; Additive white noise; Code division multiplexing; Detectors; Floors; Gaussian noise; Interference cancellation; Matched filters; Multiaccess communication; Noise cancellation; Silicon carbide;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on
Conference_Location :
Sun City
Print_ISBN :
0-7803-4281-X
DOI :
10.1109/ISSSTA.1998.722465
