在此基础上分析了编码和译码程序的设计，并给出了系统的程序设计框图。
On the basis of these, analysed the coding and decoding programming, as well as giving the system design diagram.
为了进一步提高编码系统性能，提出了有效的联合迭代译码技术和新颖的预译码技术。
In order to further enhance the performance of the coded system, effective joint iterative decoding technique and novel pre-decoding technique are proposed.
针对此系统，提出了简化的LDPC码编码调制译码初始化算法。
For theis system, a simplified LDPC coded modulation decoding initialization algorithm is proposed.
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