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从精确成对错误概率(PEP)出发,推导得到了DUST调制群码符号误码率(SEP)的联合边界。摈弃行列式秩或欧氏距离的概念,综合考虑天线数及信噪比,在特定范围内最小化符号误码率联合边界,最后得到了优化循环群码。仿真结果表明,采用此方法获得的优化循环群码性能优于行列式秩或欧氏距离设计的空时编码。
Based on the accurate paired-error probability (PEP), the joint boundary of symbolic symbol bit error rate (SEP) of DUST modulation is deduced. Excluding the concept of rank or Euclidean distance, considering the number of antennas and the signal-to-noise ratio, minimizing the symbol error rate joint bound within a specific range, the optimized cyclic group code is finally obtained. The simulation results show that the performance of optimized cyclic group codes obtained by this method is better than that of space-time codes designed by rank or Euclidean distance.