基于 PAM 分解面向判决的 Multi -h CPM 载波相位同步

多指数连续相位调制（Muhi—h CPM，Multi—h Continuous Phase Modulation）具有频谱效率高，抗误码性能好的特点，具有广泛的应用前景，但同步问题一直是Multi—hCPM接收机的难点之一。在已有单指数CPM载波相位同步算法的基础上，研究了一种基于PAM分解面向判决的Multi—hCPM信号载波相位同步算法，为了有效界定所提出算法的性能，推导出了Multi—hCPM载波相位估计的修正克劳美罗限（MCRB）。仿真结果表明，在较大多普勒频率及其变化率的环境下，该载波相位算法的估计性能良好且能逼近其MCRB。

A Decision-Directed Carrier Phase Recovery Algorithm based on PAM Decomposition for Multi-h CPM

Muhi-h Continuous Phase Modulation with features of high spectral efficiency and good performance of error resilience has broad application prospects. However, the synchronization issue has been one of the difficulties for Muhi-h CPM receiver. Based on a existing single-h CPM carrier phase recovery algorithm, a decision-directed carrier phase recovery algorithm based on PAM decomposition for Muhi-h CPM is studied in this paper. In order to define the performance of the proposed algorithm effectively, the MCRB of multi-h CPM carrier phase estimation is deduced. The simulation results show that, in the environment of large doppler frequency and gradient of doppler frequency, the estimation performance of the algorithm is good and it can at）broach the MCRB.