应用LFM-类Frank复合波形抑制MIMO通道间耦合

Suppression of Channel-interference in MIMO System Applying LFM-Frank-like Waveform

在MIMO(Multiple Input Multiple Output)系统中,为了减小滑动匹配滤波过程中各通道之间相互耦合干扰,需要增大各通道间的载频间隔,因此会占用较大的系统带宽.为了减小载频间隔,我们提出了LFM-类Frank复合波形,并且推导了它的匹配滤波输出.仿真结果表明,与LFM及LFM-Frank波形相比,LFM-类Frank复合波形可以在减小载频间隔的同时获得良好的匹配滤波输出,减少系统占用的带宽,提高频谱资源利用率.

In MIMO （Multiple Input Multiple Output） system, a large frequency space is conventionally required to reduce the interference of different channels .This method needs relatively wide frequency band that cannot be met in current busy air .Focus on this problem , a Frank-like code was introduced and applied to phase modulation of LFM , gathering LFM -Frank-like waveform .Then its matched filter output is derived . The simulation reveals that compared with LFM waveform and LFM -Frank waveform, well-preforming matched filter output can be obtained with relatively small frequency interval by this method .