Abstract
In this paper, a low-complexity noncoherent maximum likelihood sequence detection (MLSD) scheme for PCM/FM is proposed. In the proposed method, the criterion of noncoherent MLSD is derived when the carrier phase is unknown, and then a novel Viterbi algorithm (VA) with modified state vector is designed to simplify the implementation of noncoherent MLSD. Both analysis and experimental results show that the proposed approach has lower computational complexity and does not need accurate carrier phase recovery, which overcomes the shortage of traditional MLSD method. What’s more, compared to the traditional MLSD method, the proposed method also achieves the same detection performance.
Published Version
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