摘要
MIMO-OFDM技术是近年来通信信号处理领域的研究热点,无线信道不仅是频率选择性的,而且是时变的,为了获得较高的系统性能,信道估计就显得尤为重要。对MIMO-OFDM系统中现有的信道估计算法进行了综述,重点介绍了基于训练序列的、导频符号的以及盲和半盲信道估计算法。比较了各种算法的优缺点,提出了未来信道估计的发展方向。
The research of MIMO-OFDM has received much attention in the communication signal processing field. However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying. In order to improve the performance of MIMO-OFDM systems, it is especially important to estimate the channel accurately. The existing channel estimation algorithms for MIMO-OFDM are reviewed, which focus on training-sequence, pilot-symbols-aided, blind and semi-blind channel estimation. Finally, the algorithms are compared and the trend of development of channel estimation in the future is proposed.
出处
《电子科技》
2007年第2期73-75,共3页
Electronic Science and Technology
