项目名称: LDPC编码的高能效、高谱效编码调制技术研究
项目编号: No.61302095
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 无线电电子学、电信技术
项目作者: 周林
作者单位: 华侨大学
项目金额: 25万元
中文摘要: 为了满足未来高速无线通信的需求,本课题旨在联合信道编码和调制技术,研究具有低发射功率、高可靠性、高频谱效率及一定自适应特性的新型编码调制系统。主要研究内容包括:(1)拟引入新的比特级自由度,在迭代恢复树图上研究多元速率兼容LDPC码的优化设计算法;(2)针对多元比特级速率兼容LDPC码,设计高阶星座的映射算法,并结合星座的空间编码/成形增益技术,研究高阶星座的子集优化选取问题;(3)研究基于单层LDPC编码的概率成形增益技术,并与空间成形增益技术对比分析;(4)在技术成熟情况下,与合作单位专家论证本课题应用在我国未来空间/深空通信系统中的可行性。
中文关键词: 低密度奇偶校验码;速率兼容;成形增益;自适应编码调制;打孔
英文摘要: To meet the need of high-speed wireless communications in future, this project study the association between channel coding and modulation techniques in order to design novel coded-modulation systems with low transmit power, high reliability, efficient spectrum and characteristic of adaptivity. Specifically, the following issues are involved: (1) we plan to research on the design of non-binary rate-compatible low-density parity-check (NB-RC-LDPC) codes though introducing new bit-wise freedom based on the iterative recovery tree; (2) by introducing the spacing coding gain and the outline shaping gain in the constellations, we investigate the method for mapping NB-RC-LDPC codes to high-ord constellations, and research on the algorithm for selecting the subset from high-ord constellations; (3) the probability-based one-layer shaping technique is detailedly proposed and the performance analysis will be compared with space-outline-based shaping technique; (4)if things go well, we will try to apply some algorithms to future space/deep-space communications of China with the experts of the cooperative institute.
英文关键词: LDPC;rate-compatible;shaping gain;adaptive coded modulation;puncturing