| 摘要: |
| 由于载波间干扰（ICI）是影响正交频分复用（OFDM）系统性能的重要因素，一般消除ICI时作信道估计都采用辅助导频的方法，需要使用大量的离散导频，为此提出了一种对MIMO信道中ICI消除的时域均衡方法。该方法利用MIMO空时检测后的数据信息迭代回去，当作导频符号估计出时变信道的冲激响应，然后通过时域均衡消除ICI，而无需额外的导频，在改善系统误误码率的同时，提高了频谱的利用率。 |
| 关键词: 载波间干扰 时域均衡 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:August 16, 2005Revised:December 28, 2005 |
| 基金项目:国家高技术研究发展计划(863计划);国家自然科学基金 |
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| Intercarrier Interference (ICI) Cancellation by Time-Equalization in MIMO-OFDM Systems |
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| Abstract: |
| For orthogonal frequency-division multiplexing(OFDM) communication systems,a loss of subcarrier orthogonality due to time-variant multipath channel leads to intercarrier interference(ICI).This paper studies an ICI cancellation method for multiple input multiple output(MIMO) system by time-domain equalization.To gain the optimal filter coefficient,the channel information should be estimated.In this paper,the data information is used after MIMO detection as scatter pilot to perform time-variant channel estimation.It needs no any extra pilot information,and can improve the system bandwidth utilization. |
| Key words: OFDM MIMO |
