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总结了差分酉空时调制的原理和编译码方法。差分酉空时调制是多输入多输出(MIMO)无线通信中不需要信道信息的一种调制方法,它的性能比相干检测接收差3dB。文中首先介绍了酉空时调制的基本原理和在各种信噪比下的信号星座图的设计原则;然后在此基础上介绍了不需要信道信息的差分酉空时调制;最后介绍了差分酉空时调制的最新进展,指出了其研究方向。
Summarized the principle of differential unitary space-time modulation and coding method. Differential unitary space-time modulation is a modulation method that does not require channel information in multiple-input-multiple-output (MIMO) wireless communication, and its performance is 3 dB worse than coherent detection. Firstly, the basic principles of unitary space modulation and the design principles of signal constellation under various signal-to-noise ratios are introduced. Based on this, the introduction of the differential unitary space-time modulation without channel information is introduced. Finally, The latest development of space-time modulation, pointed out its research direction.