Experimental Study of Specifying the Number of Parallel Transmitted Signals in MIMO and Cognitive Wireless Communication。

频谱资源短缺是一个严重的问题。近年来，MIMO和认知无线电技术引起了人们的广泛关注。在MIMO中，可以构造单频率信道中的并行传输。在认知无线电中，可以对无线通信环境进行准确的识别和自适应，MIMO和认知无线电技术在实现高频率利用率方面具有强大的优势。在MIMO中，应该指定信道中发送的信号的数量。在本报告中，考虑了用于指定发送信号的数量的技术。在实际设备的实验中，阐明了该系统的实现要求。

The shortage of frequency spectrum is serious problem. Recently, MIMO and Cognitive Radio are attracting much attention. In MIMO, the parallel transmission in single frequency channel can be constructed. In cognitive radio, the accurate recognition and adaption to wireless communication environment are available, MIMO and Cognitive radio are powerful for achieving the high efficiency of frequency usage. In MIMO, the number of transmitted signals in the channel should be specified. In this report, the technique for specifying the number of transmitted signals is considered. In the experiment of the actual equipment, the requirement of implementation for it is clarified.