基于多符号差分相关的CPM非相干解调算法

为了解决连续相位调制(CPM)信号在某些突发传输条件下或信道快速变化情况下的解调难题,该文研究了基于多符号差分相关的非相干维特比(Viterbi)解调算法。从理论上分析了算法在CPM调制解调系统中的应用、性能和可实现性,并以高进制、低调制指数的CPM信号为例,通过数值仿真验证了理论结果。在CPM非相干解调中考虑多符号差分相关,能够将复杂理论向实际应用简化,以最小的性能代价换取系统复杂度的降低和解调速度的提高,易于在各种硬件平台上以软件无线电格式实现,有一定的理论和实用价值。

Non-coherent demodulation of continuous phase modulation signals based on multi-symbol differential correlation

In order to deal with the problem of the demodulation of continuous phase modulation (CPM) signals in some special cases, the performance and implementability of non-coherent Viterbi algorithm based on multi-symbol differential correlation was investigated. Taking a CPM signal with high-order-ary and smaller modulation exponent, for example, the Matlab simulation verified the theoretic analysis. Using the multi-symbol differential in CPM non-coherent demodulation, it can decrease the complexity and accelerate the demodulate speed with the least performance loss. Besides that, the method can be implemented in most of hardware platforms using software wireless radio. The algorithm has both theoretical and practical values.