双码率全相位旋转不变TCM设计

摘要

文章在总结旋转不变卷积码性质的基础上,利用编码网格的旋转不变特性,构造了一种适用于时变信道的双码率全相位旋转不变TCM方案。该方案可以获得较高的编码增益,同时满足任意角度的相位旋转不变。%Rotationally invariant trellis code is a powerful method to overcome phase ambiguity without extra information.An efficient algorithm for constructing pair rates fully rotationally invariant trellis coded modulation in time-vary channels is presented in this paper.In addition,preliminary indications is provided on its performance.