卫星通信中串行级联CPM系统信号优化和处理方法研究

项目名称： 卫星通信中串行级联CPM系统信号优化和处理方法研究

项目编号： No.61301164

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： 潘克刚

作者单位： 中国人民解放军理工大学

项目金额： 25万元

中文摘要： CPM是一种高效的调制方式，由于其具有相位记忆特性而拥有纠错能力，若将编码和CPM相结合构成级联结构并采用迭代理论进行软信息传递，能够大大提高系统整体性能。本课题主要研究级联CPM系统优化设计和处理。首先对迭代CPM串行级联系统的性能界进行分析以及对其系统收敛门限进行优化设计研究，着重针对采用部分响应CPM方式和多调制指数CPM方式的迭代串行级联系统进行研究；其次基于密度进化理论与EXIT图理论工具，研究迭代CPM串行级联系统的动态收敛特性，最大限度的利用迭代理论来提高系统整体的性能；最后，基于Larruent的PAM分解思想研究适用于CPM的低复杂度SISO算法，并且将该算法与其它复杂度降低技术联合考虑进行优化，旨在性能损失能够容忍的前提下，尽可能的降低迭代CPM串行级联系统的复杂度，推进该系统的实用化进程。

中文关键词： 连续相位调制；串行级联；性能界；低复杂度接收；低复杂度同步

英文摘要： Continuous Phase Modulation(CPM) is an efficient modulation technique, which introduces memory between phase transitiones.In other words, it owns the encoding features. Nowadays, the system with concatenated structure constructed by outer encoder, interleaver and inner CPM has superior performance, which adopts the iterative theory at the receiver side. Hence, the way of signal optimization and processing with serially concatenated structure of CPM in an iterative way is mainly focused on with this fund. Firstly, the performance bound and the threshold of such concatenated system will be analyzed, especially on the system with partial response CPM or multi-h CPM. Secondly, the dynamic features in the system convergence process will be investigated based on the density evolution theory and EXtrinsic Information Transfer(EXIT) theory. Some iteration-stopping rules will be presented to prevent the vibrationes in the system convergence process, and to improve the performance of such concatenated system. At last, the low-complexity soft-in soft-out algorithm of CPM will be presented based on Larruent's PAM decomposition idea. The combining design of such algorithm with other complexity reducing techniques will also be considered to reduce the system complexity as much as possible with little performance loss, which m

英文关键词： Continuous Phase Modulation；Serially Concatenated；Performance Bound；Low Complexity Reception；Low Complexity Synchronization