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。 Aiming at the problem that the phase of the mid signal is easily influenced by noise in the reentry telemetry environment, leading to the misjudgment of the maximum likelihood value in the traditional MSD process, an improved multi-symbol detection algorithm is studied: every MSD operation has N An overlap of -2 symbols, ie a symbol sliding strategy of two symbol lengths per slide. Simulation and test results verify the effectiveness of the improved algorithm.