摘要
针对多输入多输出(MIMO)的应用需要,研究了一种利用发端信道状态信息(CSIT)进行预编码,增强系统性能的方法。该方法在发送端采用线性预编码器对CSIT进行预编码,合理分配不同天线的发射功率以提高系统性能;分别在低、高信噪比条件下,对进行预编码前后的容量比值差值进行了仿真分析。分析结果表明:进行预编码后,MIMO系统容量明显改善,以上研究结果对MIMO的工程应用有良好的参考意义。
This article mainly describes a new technique of MIMO system based on the recent communication demand. This technique, by pre-coding CSIT （the channel state information） at the transmitter, could improve the performance of MIMO system. The method, with linear pre-coder, pre-codes CSIT at the transmitter, reasonably distributes the transmitting power of different antennas and thus improves the system performance. The simulation of the capacity ratio before or after the pre-coding of CSIT at low or high SNR indicates that, with the pre-coding of CSIT, the system performance is remarkably improved and the result of this research could serve as a good reference for MIMO engineering.
出处
《信息安全与通信保密》
2011年第1期61-62,65,共3页
Information Security and Communications Privacy
