標題: | ISI mitigation and channel tracking in MIMO-OFDM systems |
作者: | Wu, WR Hsu, CY Hsu, HT 電信工程研究所 Institute of Communications Engineering |
公開日期: | 2005 |
摘要: | When the channel response is longer than the guard interval in OFDM systems, inter-symbol interference (ISI) and intercarrier interference (ICI) will occur and this may seriously affect the receiver performance. In this paper, we consider the ISI and ICI mitigation in MIMO-OFDM systems. We propose to use a decision feedback technique for ISI cancelation and a cyclic reconstruction technique for ICT removal. Combining with the V-BLAST method, we obtain an iterative signal detection algorithm for MIMO-OFDM systems. Since the channel may be time-vaniant, we then further propose an adaptive time-domain channel tracking method. The algorithm can be implemented with IFFT so that its computational complexity is low. Simulations demonstrate that the proposed method can effectively enhance the overall MIMO-OFDM system performance. |
URI: | http://hdl.handle.net/11536/17597 |
ISBN: | 0-7803-9266-3 |
期刊: | ISPACS 2005: PROCEEDINGS OF THE 2005 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATION SYSTEMS |
起始頁: | 101 |
結束頁: | 104 |
顯示於類別: | 會議論文 |