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OFDM系统非规则LDPC码优化设计

DOI: 10.13190/jbupt.200604.107.054, PP. 107-110

Keywords: 低密度校验码,正交频分复用,码优化设计

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Abstract:

提出了一种简单的非规则低密度校验码(LDPC)的优化设计方案。该方案充分考虑了正交频分复用(OFDM)信道的衰落特性,并利用LDPC码迭代译码原理,在衰落较大的子信道传输具有较高节点度的信息比特,在衰落较小的子信道传输具有较低节点度的信息比特。仿真结果表明,当码长为1024,码率为1/2时,该方案与规则码相比,在误比特率为10-5时可以节省3dB,且降低了设计最优码的复杂度。

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