Title :
Performance analysis of PIC-CDMA systems
Author :
Li, V.D. ; Tjhung, T.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
We present a closed-form bit error rate (BER) expression for multistage parallel interference cancellation (PIC) schemes implemented in asynchronous direct-sequence code division multiple access (DS-CDMA) systems over Nakagami multipath fading channels. Instead of the conventional standard Gaussian approximation (SGA) approach, we adopt an improved Gaussian approximation (IGA) method, which takes into account the second order effects of the multiple access interference (MAI), to derive the BER expression. We show by Monte Carlo (MC) simulation that the derived expression indeed gives an accurate prediction of the error performance of PIC-DS-CDMA systems. The BER formula presented can be used to alleviate extensive computer simulation usually required for performance evaluation of PIC-DS-CDMA systems.
Keywords :
approximation theory; code division multiple access; error statistics; fading channels; interference suppression; land mobile radio; multipath channels; multiuser channels; radiofrequency interference; BER; Monte Carlo simulation; Nakagami multipath fading channels; PIC-CDMA systems; asynchronous DS-CDMA; asynchronous direct-sequence code division multiple access; closed-form bit error rate; computer simulation; error performance prediction; improved Gaussian approximation; mobile radio; multiple access interference; multistage parallel interference cancellation; performance analysis; standard Gaussian approximation; uplink; Bit error rate; Computational modeling; Fading; Gaussian approximation; Interference cancellation; Monte Carlo methods; Multiaccess communication; Multiple access interference; Performance analysis; Predictive models;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1183300
