一种串行级联CPM的简化迭代译码方法  

Simplified Iterative Detection Method for Serially Concatenated CPM

作　　者：周荣[1] 刘爱军[1] 潘克刚[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《电视技术》2015年第11期104-107,共4页Video Engineering

基　　金：国家自然科学基金项目(61301164)

摘　　要：针对如何降低串行级联CPM系统接收译码复杂度这一问题,提出一种简化迭代译码方法。该方法利用PAM分解,将CPM信号网格状态数减少至2,有效地降低了接收端解码器的复杂度。此外,与现有方法不同,由于解调器可与基于PAM分解的符号检测器共用前端匹配滤波器,系统接收机的复杂度显著降低。仿真表明,当误比特率为10-5时,系统的复杂度显著降低,而误码性能损失仅约为0.1 d B。In this paper,a simplified iterative detection method is proposed for reduced complexity serially concatenated CPM.On one hand,the proposed method reduce the complexity of inner code decoder effectively by using a 2 state trellis based on PAM.On the other hand,different from other methods,the proposed method is reduced-complexity for receivers because the demodulator just need a single front-end filter for it shares the same match filters with the PAM-based detectors.Simulations show that the performance penalty for the method is about 0.1 dB at a BER of 10-5,when the system has reduced complexity effectively.

关 键 词：串行级联 连续相位调制 脉冲幅度调制 

分 类 号：TN911.3[电子电信—通信与信息系统]