Analytical comparison of mean-squares errors for channel response estimation based on frequency- and time-domain pilot signals

Ming-Xian Chang, Chi Shuo Li, Chiung Wen Wei, Chih Kuan Lee

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

For the orthogonal frequency-division multiplexing (OFDM) system, one can estimate the channel responses (CRs) based on frequency-domain (FD) pilot symbols. On the other hand, one can also estimate the time-domain (TD) channel impulse response by inserting a unit pulse ahead of each OFDM block. However, there is no analytical comparison between the CR estimation based on FD pilot symbols and TD unit pulses. In this paper, we give the analytical comparison of the mean-squares errors (MSEs) for the CR estimation based on TD and FD pilot signals. For the CR estimation based on FD pilot symbols, the linear minimum mean-squares error (LMMSE) algorithm is optimal. We derive an MSE lower bound for the LMMSE algorithm among all possible distribution of pilot symbols. This MSE lower bound coincides with the MSE attained by the optimal CR estimation based on TD unit pulses. We also show that with the uniform distribution of pilot symbols, the resulted MSE is very close to the MSE lower bound for the LMMSE algorithm. Our results conclude that the optimal CR estimation based on TD and FD pilot signals attain almost the same MSEs.

原文English
主出版物標題2012 International Symposium on Wireless Communication Systems, ISWCS 2012 - Proceedings
頁面959-963
頁數5
DOIs
出版狀態Published - 2012
事件2012 9th International Symposium on Wireless Communication Systems, ISWCS 2012 - Paris, France
持續時間: 2012 八月 282012 八月 31

Other

Other2012 9th International Symposium on Wireless Communication Systems, ISWCS 2012
國家France
城市Paris
期間12-08-2812-08-31

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

指紋 深入研究「Analytical comparison of mean-squares errors for channel response estimation based on frequency- and time-domain pilot signals」主題。共同形成了獨特的指紋。

引用此