標題: Performance analysis of multicarrier CDMA systems with frequency offsets and random spreading under optimum combining
作者: Chien, FT
Hwang, CH
Kuo, CCJ
傳播研究所
電子工程學系及電子研究所
Institute of Communication Studies
Department of Electronics Engineering and Institute of Electronics
關鍵字: asynchronous transmission;carrier-frequency offset (CFO);code-division multiple access (CDMA);multicarrier CDMA (MC-CDMA);random signature sequence
公開日期: 1-四月-2006
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.
URI: http://dx.doi.org/10.1109/TCOMM.2006.873094
http://hdl.handle.net/11536/12402
ISSN: 0090-6778
DOI: 10.1109/TCOMM.2006.873094
期刊: IEEE TRANSACTIONS ON COMMUNICATIONS
Volume: 54
Issue: 4
起始頁: 737
結束頁: 747
顯示於類別:會議論文


文件中的檔案:

  1. 000237118800020.pdf