一种改进的多符号检测算法  

An improved multiple symbol detection algorithm

作　　者：何伟[1] 丁求启[1] 陶敏[1] 

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《电子设计工程》2014年第22期147-149,153,共4页Electronic Design Engineering

摘　　要：针对再入遥测环境下中信号相位容易受噪声影响,导致传统MSD过程中最大似然值被误判的问题,研究一种改进的多符号检测算法:每次MSD运算较前一次MSD运算有N-2个码元的重叠,即每次滑动两个码元长度的码元滑动策略。仿真和测试结果验证了改进算法的有效性。As the phenomenon of the telemetry signal phase easily affected by noise in the reentry environment lead to the traditional maximum likelihood in the process of MSD values wrongfully convicted, an improved multiple symbol detection algorithm is researched： Before each MSD operation is a MSD operation with N-2 yards yuan overlap, where each slide element sliding strategy of two element length. The simulation and test results verify the effectiveness of the improved algorithm.

关 键 词：调频 多符号检测技术 滑动策略 似然值 

分 类 号：TN914.4[电子电信—通信与信息系统]