基于Grassmann流形的非相干空时码设计

摘要

本文研究在Grassmann流形上构造非相干酉空时码的代数方法.首先提出一类发射天线数和相干时间都为任意大小的满速率满分集相干空时码,然后采用非线性指数映射方式,将该相干空时码映射到Grassmann流形上,生成Grassmann非相干酉空时码.新构造的Grassmann酉空时码比其它相同发射天线的酉空时码具有更高的频谱效率和更优的误码率性能.%We mainly study on the design of noncoherent space-time code based on Grassmannian with algebraic method. First of all, we present a new family of full-rate and full-diversity coherent space-time codes with arbitrary number of transmit antennas and coherent time.Then our noncoherent space-time codes can be built from the coherent space-time codes via a non linear map called exponential map. With the same number of transmit antennas,the new noncoherent space-time code have better performance than the present code.