A novel low-density parity-check (LDPC) coded Gaussian minimum shift keying (GMSK) scheme is proposed for wireless communications subject to low SNRs, limited power and spectrum resources. We first design a non-recursive GMSK modulator to alleviate the impact of error propagation. Then, a pilot-aided quasi-coherent demodulation algorithm (PA-QCDA) is derived, where a modified BCJR-based detection is used to produce the soft-output with initial and ending trellis-states being determined using the overhead-limited pilot. We choose proper parameters for the non-recursive GMSK signaling according to the trade-off of the power and spectral efficiency. Simulation results show that the proposed non-recursive GMSK system with the PA-QCDA can achieve performance similar to the LDPC coded BPSK system and can also work well in the presence of large frequency and phase offsets or burst errors.


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    Title :

    LDPC Coded Non-Recursive GMSK System with Quasi-Coherent Demodulation


    Contributors:
    Liu, Mengmeng (author) / Yu, Zhongyang (author) / Lu, Qingya (author) / Bai, Baoming (author) / Zhu, Min (author)


    Publication date :

    2020-05-01


    Size :

    235706 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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