【摘要】 针对非合作条件下实现CPM信号相干解调,首先要准确估计CPM信号调制参数这一关键问题,该文提出了一种基于数据辅助的CPM信号调制指数与成型脉冲联合估计的新方法,使用符号间的相位差分消除CPM信号相位的记忆特性,采用最小二乘法获得调制指数和成型脉冲的联合估计。理论分析与数值仿真表明该方法是无偏的,当数据观测长度为N时,其估计误差以1/N的速率收敛到0。算法适用于全响应和部分响应CPM信号,具有良好的抗噪声性能。更多还原

【Abstract】 In non-cooperative communication scenarios, coherent demodulation of Continuous Phase Modulation (CPM) signals requires precise estimation of CPM modulation parameters. A new data-aided modulation index and shaping pulse joint estimation algorithm is proposed for CPM signals. The differential phase between symbols is used to eliminate signal phase memories, and Least-Square method is used for parameters estimations. Theoretical analysis and numerical simulations show that it is unbiased. The estimating error is converged to zero at 1/N where N is the length of observation data. The algorithm is applicable to both full and partial response CPM modulations and presents good anti-noise performance.更多还原