Reduced-complexity non-coherent detection for Multi-h CPM
Zhong Shen · Jisuanji gongcheng yu sheji · 2014
To solve the difficulty and complexity of carrier phase recovery problem of Multi-h CPM,an algorithm of reducedcomplexity non-coherent sequence detection for Multi-h CPM based on PAM decomposition is proposed.Non-coherent sequence detection of residual carrier frequency offset and carrier phase amendment is realized through the inductive reference phase signal, and the number of matched filters and trellis is reduced by means of PAM decomposition approximation form and per-survivor processing.Modulation index estimation and synchronization is realized by calculating and searching branch metrics according to possible modulation index sequence.Simulation analysis shows that,the performance of the proposed algorithm is better than traditional one-symbol differential detection and its implementation complexity is relatively low.When residual carrier frequency offset exists,its detection performance is also robust.