基于LDPC编码的CPM调制系统设计与分析  

Design and analysis of a serially concatenated CPM system based on LDPC code

作　　者：李寰宇[1] 柏鹏[1] 彭卫东[1] 王徐华[1] 贺刚[1] 

机构地区：[1]空军工程大学综合电子信息系统与电子对抗技术研究中心,陕西西安710051

出　　处：《电子技术应用》2011年第12期110-113,共4页Application of Electronic Technique

基　　金：装备预先研究项目基金51310020401;陕西省重点实验室基金201102Y02)

摘　　要：从对抗需求和可实现性出发,设计了一种基于LDPC编码的CPM调制系统,对系统结构进行了优化设计,避免了LDPC和CPM之间多次迭代所带来的系统复杂度问题,通过对编码和调制过程中的主要算法进行简化,减少了运算量,提高了可实现性。最后,对系统性能进行了仿真,并对仿真结果进行了对比分析,同时给出了硬件实现的资源使用情况。结果表明该设计在同等信道条件和误码率需求下,具有更低的发射功率,能够获得更好的低截获性,对实际应用具有一定的指导意义。Basing on the consideration of military requirements and realizability, a serially concatenated continuous phase modulation system based on LDPC codes was designed in this paper, the system structure was optimized to avoid multiple iterations between LDPC and CPM, which can reduce the system complexity. By simplifying the main algorithm of coding and modulation, the amount of computation was reduced. Finally, the simulation of the system was given. The result shows that, with the same channel condition and bit error rate, the design has a lower transmit power, access to a better performance in low probability of intercept, there is certain guiding significance in practice.

关 键 词：对抗性无线通信 低密度奇偶校验码 连续相位调制 串行级联 

分 类 号：TN911.22[电子电信—通信与信息系统]