平坦瑞利衰落信道上具有BDPSK和差分检测的LDPC码

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference Pub Date : 2007-12-26 DOI:10.1109/GLOCOM.2007.615

V. T. Nam, P. Kam, Yan Xin

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引用次数: 15

摘要

我们推导了在瑞利衰落信道上以BDPSK调制传输的LDPC码的迭代译码的正确对数似然差分检测度量。该度量不需要估计复杂通道增益的幅度，这表明文献中需要估计通道增益幅度的现有度量是次优的。仿真结果证实，有意的信噪比低估进一步改善了BEP。

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LDPC Codes with BDPSK and Differential Detection Over Flat Rayleigh Fading Channels

We derive the correct log-likelihood differential detection metric for iterative decoding of LDPC codes transmitted with BDPSK modulation over Rayleigh fading channels. This metric does not require estimation of the amplitudes of the complex channel gains, showing that existing metrics in the literature that require estimation of amplitudes of channel gains are suboptimum. Simulation results confirm that an intentional SNR underestimation further improves BEP.

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IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference

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