论文部分内容阅读
文中研究了CPM的特性,提出并证明了连续相位编码器(CPE)编码特性定理,并就此对SOVA算法进行了改进;实现了串行级联部分响应CPM基于SOVA算法的迭代接收,大大降低了串行级联CPM迭代接收的复杂度;最后利用计算机对基于LOG-MAP、MAX-LOG-MAP和改进的SOVA三种算法的串行级联CPM的迭代接收分别进行了仿真。仿真结果表明串行级联CPM基于SOVA算法的迭代译码和基于MAX-LOG-MAP算法的迭代译码的性能非常接近,在文中的仿真条件下当误比特率达到10-5时比特信噪比仅相差约0.1 dB。
In this paper, we study the characteristics of CPM, propose and prove the CPE coding property theorem, and improve the SOVA algorithm. Iterative reception of serial cascaded CPM based on SOVA algorithm is greatly reduced Serial cascade CPM iterative reception complexity; Finally, computer simulation of iterative reception of serial cascade CPM based on LOG-MAP, MAX-LOG-MAP and improved SOVA three algorithms respectively. The simulation results show that the iterative decoding based on the SOVA algorithm and the iterative decoding based on the MAX-LOG-MAP algorithm are very close to the performance of serial cascade CPM. When the bit error rate reaches 10-5 under the simulation condition, A difference of only about 0.1 dB.