MC-CDMA系统准同步上行链路的时间同步方案

Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI:10.1109/ISSPIT.2003.1341135

A. Purwoko, A. Hassan

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引用次数: 2

摘要

提出了一种多载波码分多址(MC-CDMA)系统准同步上行链路时间同步或时延估计的新方法。该方法基于循环前缀，估计多径多用户信号的平均时延。使用低复杂度算法估计循环前缀相关峰的位置，该算法利用这些峰以周期等于MC-CDMA帧长度的周期性方式存在的事实。该方法允许快速傅里叶变换(FFT)窗口放置在距离估计时间延迟的固定距离处，避免任何符号间干扰(ISI)用户。

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A time synchronization scheme for quasi-synchronous up-link of MC-CDMA systems

We propose a new method for time synchronization or time delay estimation in quasi-synchronous up link of multi-carrier code division multiple access (MC-CDMA) systems. The method is cyclic prefix based and estimates the average time delay of multipath multiuser signals. Position of cyclic prefix correlation peaks is estimated using a low complexity algorithm, which exploits the fact that these peaks exist in periodic fashion with a period equal the MC-CDMA frame length. This approach allows the fast Fourier transform (FFT) window placement at a fixed distance from the estimated time delay avoiding any intersymbol interference (ISI) users.

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Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)

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