基于MAP算法的SCCPM系统迭代译码仿真  

Simulations for Iterative Decoding of SCCPM based on MAP Algorithm

作　　者：王雪宝 高俊[1] 窦高奇[1] 

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《通信技术》2016年第5期539-543,共5页Communications Technology

摘　　要：为了有效地解决功率和带宽同时受限条件下的通信困难问题,采取串行级联连续相位调制(SCCPM)方法来提高系统的带宽利用率,并利用基于最大后验概率(MAP)算法进行迭代译码以增加系统的增益。SCCPM有效地结合了高效编码方式和连续相位调制方式,功率效率和带宽效率两者同时得到提高。通过仿真编码调制和译码过程,分析各编码调制和译码参数对系统误码率(BER)的影响,提出一种预选——反馈联合参数设定的思想,为实现不同信噪比(SNR)下选择最优联合参数提供参考。To solve the communication problem with the restrictions on both power and frequency, SCCPM （Serially Concatenated Continuous Phase Modulation） is used to improve the frequency efficiency of sys- tem, and iterative decoding based on MAP （Maximum a Posteriori） algorithm is used to improve the gain of system. SCCPM effectively combines efficient coding and Continuous Phase Modulation （CPM） , thus both power efficiency and frequency efficiency are improved. An analysis of the effect of coding modulation and decoding parameters on BER （ Bit Error Rate） is conducted by simulation on process of coding modu- lation and decoding, and an idea of preselect-feedback joint parameters setting is proposed which provides a reference to selecting optimal joint parameters under different SNR （Signal Noise Ratio）.

关 键 词：串行级联连续相位调制 最大后验概率算法 迭代译码 误比特率 预选——反馈 

分 类 号：TN911[电子电信—通信与信息系统]