Performance of Asynchronous Long-Code Multicarrier CDMA Systems in the Presence of Frequency Offsets and Correlated Fading

Feng-Tsun Chien, Chien H. Hwang, C. C. Jay Kuo

研究成果: Paper同行評審

1 引文 斯高帕斯(Scopus)

摘要

The effects of frequency offsets and aperiodic random spreading sequences on the performance of asynchronous multicarrier code division multiple access (CDMA) systems with correlated fading are investigated in this research. Random parameters including asynchronous delays, correlated Rayleigh fading and spreading sequences are averaged to determine the covariance matrix of the interferenceplus-noise vector. An analytic expression for the average signal-to-interference-plus-noise ratio (SINR) is obtained. Furthermore, average bit error probability (BEP) based on the Gaussian approximation is also derived. We show that the system degrades significantly if the frequency offset of the desired user is present, while the system is insensitive to interferers' frequency offsets. In consequence, it is crucial to estimate and compensate the desired user's synchronization imperfection. Finally, design tradeoff among the number of sub-carriers, fading correlations, and inter-carrier interference (ICI) are presented in simulation results.

原文English
頁面1079-1083
頁數5
出版狀態Published - 1 十二月 2003
事件IEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States
持續時間: 1 十二月 20035 十二月 2003

Conference

ConferenceIEEE Global Telecommunications Conference GLOBECOM'03
國家/地區United States
城市San Francisco, CA
期間1/12/035/12/03

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