There are two serious challenges in the future broadband wireless communication systems: multi-path fading in the wireless channel and spectral efficiency.
在未来的宽带无线通信系统中，存在着两个严峻的挑战：无线信道的多径衰落和频谱效率。
In addition, there will be frequency selective fading in the future broadband MIMO wireless communication systems, and the traditional high-performance equalizer will become extremely complicated.
另外在未来宽带MIMO无线通信系统中，通常面临频率选择性衰落信道，传统高性能均衡器就会变得异常复杂。
With wide application of broadband wireless access technology, the EMI phenomenon is more and more serious among communication systems and inner communication base station.
随着宽带无线接入技术的广泛应用， 通信系统之间以及通信基站内部的电磁干扰（EMI）现象越来越严重。
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