Title :
Performance bounds for decorrelator detectors in a QS-CDMA system
Author :
Iltis, Ronald A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
A linear decorrelator detector is considered for use in a quasi-synchronous code-division multiple access (QS-CDMA) system. A QS-CDMA communication system is considered in which decorrelators are employed for multiuser detection at the base station. For long code lengths, the evaluation of bit-error rate can be computationally expensive, due to the need for exhaustive search to determine the worst case relative delays. An upper bound on the error rate based on eigenvalue bounds is presented for the linear decorrelator detector, and which can be computed solely in terms of the maximum cross-correlation between codes and the number of users
Keywords :
code division multiple access; coding errors; correlation methods; eigenvalues and eigenfunctions; error statistics; land mobile radio; pseudonoise codes; signal detection; spread spectrum communication; QS-CDMA communication system; QS-CDMA system; base station; bit error rate; codes; decorrelator detectors; direct sequence signal; eigenvalue bounds; exhaustive search; linear decorrelator detector; long code lengths; maximum cross correlation; multiuser detection; performance bounds; quasisynchronous code division multiple access; upper bound; worst case relative delays; Base stations; Bit error rate; Decorrelation; Delay; Detectors; Eigenvalues and eigenfunctions; Error analysis; Multiaccess communication; Multiuser detection; Upper bound;
Conference_Titel :
Information Theory, 1995. Proceedings., 1995 IEEE International Symposium on
Conference_Location :
Whistler, BC
Print_ISBN :
0-7803-2453-6
DOI :
10.1109/ISIT.1995.550307
