一種新的快衰落信道頻域跟蹤算法

宋梁; 胡波; 凌燮亭

一種新的快衰落信道頻域跟蹤算法

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出版歷程
- 收稿日期: 2001-03-30
- 修回日期: 2001-10-11
- 刊出日期: 2002-11-19

Frequency domain analysis in fast fading channel estimation

摘要

摘要: 該文研究了第三代移動通信系統(tǒng)中用戶移動速度在150km/h以上時,無線信道的快衰落特性,并且在3GPP系統(tǒng)的協(xié)議框架下提出了一種新的基于頻域的信道跟蹤方法(FBP),利用快衰落信道頻域上的相對穩(wěn)定性,解決了由于信道參數變化的速度超過自適應算法收斂速度,而造成的在時域上無法進行信道跟蹤的問題,文章給出了該算法的模擬結果,并與另一種對衰落信道的參數進行基于小波的信道跟蹤算法(WBP)進行了比較,該文提出的算法具有更好的性能和更低的算法復雜度。
- 快衰落信道; 信道跟蹤; 頻域處理; 小波域處理
Abstract: This paper investigates the fast fading channel with the mobile speed over 150km/h, which is used in 3G wireless communication system. Because the varying speed of channel coefficients exceeds the convergence speed of tracking algorithm, the normal time-domain based method fail. However, when transformed to frequency domain, the varying speed of channel coefficients becomes slow. Based on this observation, a novel approach to channel estimation is proposed in frequency domain. Compared with other algorithms, this method shows a good performance both in computation and tracing speed.

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