Title :
Performance analysis for coded multiuser CDMA systems with optimum joint multiuser decoding/detection
Author_Institution :
Dept. of Electr. & Comput. Eng., State Univ. of New York, Stony Brook, NY, USA
Abstract :
Optimum joint multiuser decoding/detection in coded CDMA systems is computationally prohibitive. However, iterative methods were shown to be computationally manageable while providing near optimum performance. With these advances, one can not help asking the question:“what is the the optimum performance possible in a coded CDMA multiuser system?” In the past, performance analysis in terms of asymptotic efficiency was mentioned in [3]. While such analysis is useful at very high signal to noise ratio (SNR), it may not be accurate enough in lower ranges of SNR. We first derive a precise formula for the probability of an error event which is represented by an error matrix. Then, an approximation of the bit error rate (BER) performance is given
Keywords :
code division multiple access; decoding; encoding; error statistics; multiuser channels; noise; optimisation; signal detection; BER performance approximation; BPSK; SNR; asymptotic efficiency; binary phase shift keying; bit error rate; coded multiuser CDMA systems; error event probability; error matrix; iterative methods; optimum joint multiuser decoding/detection; optimum performance; performance analysis; signal to noise; synchronous coded CDMA system; Additive noise; Bit error rate; Decoding; Error correction codes; Event detection; Gaussian noise; Interleaved codes; Multiaccess communication; Performance analysis; Signal to noise ratio;
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936035
