论文部分内容阅读
传统的基于LDPC码的BICM系统没有充分利用编码和调制的联合增益。为了提高系统性能并获得系统复杂度相对简单的BICM系统,提出了基于非规则LDPC码的次外循环迭代BR-BICM系统结构。利用映射位置的受保护程度不同以及编码调制的联合增益提高了系统的性能,仿真结果验证了系统设计的正确性。
Traditional LDPC-based BICM systems do not take full advantage of the combined gain of coding and modulation. In order to improve the system performance and to obtain a BICM system with relatively simple system complexity, an extra-cyclic iterative BR-BICM system structure based on irregular LDPC codes is proposed. The system performance is improved by the different degree of protection of the mapping position and the joint gain of the code modulation. The simulation results verify the correctness of the system design.