標題: Joint channel tracking and MAP detection for OFDMA systems in fading channels
作者: Wu, Sau-Hsuan
Lee, Shuenn Gi
Lai, Kuei-Chiang
電信工程研究所
Institute of Communications Engineering
關鍵字: OFDM;OFDMA;EM;MAP;joint estimation and detection
公開日期: 2007
摘要: In this research, we present a joint channel tracking and maximal a posteriori (MAP) symbol detection method for orthogonal frequency division multiple access (OFDMA) systems in time-varying fading channels. In contrast to some existing joint estimation and detection schemes that perform channel tracking in time-domain, we propose an algorithm that do both channel tracking and symbol detection in frequency domain, thus preventing the performance degradation due to the multiple access interference present in the time domain channel estimation. In conjunction with appropriate frequency allocation for each user, it is shown that a low-complexity algorithm can be obtained and, in the mean time, provides good performance in channel tracking.
URI: http://hdl.handle.net/11536/11179
ISSN: 1520-6149
期刊: 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol III, Pts 1-3, Proceedings
起始頁: 301
結束頁: 304
顯示於類別:會議論文