Performance analysis of multicarrier CDMA systems with frequency offsets and random spreading under optimum combining

Feng-Tsun Chien*, Chien Hwa Hwang, C. C Jay Kuo

*此作品的通信作者

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

The carrier-frequency offset effect on the performance of asynchronous multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) systems with aperiodic random spreading and correlated Rayleigh fading is studied in this paper. We obtain the optimum combining filter that maximizes the signal-to-interference-plus-noise ratio (SINR) of the combined statistics and exploits correlated information among subchannels. A closed-form expression for the unconditional covariance matrix of the interference-plus-noise vector, which forms the basis of our theoretical analysis of the maximum SINR and the average bit error probability formula, is derived by averaging several random parameters including asynchronous delays, correlated Rayleigh fading, and signature sequences. The analytic results obtained are applicable to MC-CDMA with appropriate modifications. Furthermore, we show that the MC-CDMA system with a common random signature sequence over all subcarriers for a given user outperforms that with distinct sequences over different subcarriers. Finally, the performance of MC-CDMA systems using the optimum combining technique is compared with that of different combining filters in the simulation.

原文English
頁(從 - 到)737-747
頁數11
期刊IEEE Transactions on Communications
54
發行號4
DOIs
出版狀態Published - 1 四月 2006

指紋

深入研究「Performance analysis of multicarrier CDMA systems with frequency offsets and random spreading under optimum combining」主題。共同形成了獨特的指紋。

引用此