CAJ | 학술논문

多指数连续相位调制(Multi-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-h CPM 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-h CPM 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-h CPM 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。
다지수련속상위조제(Multi-h CPM,Multi-h Continuous Phase Modulation)구유빈보효솔고,항오마성능호적특점,구유엄범적응용전경,단동보문제일직시 Multi-h CPM 접수궤적난점지일。재이유단지수 CPM 재파상위동보산법적기출상,연구료일충기우 PAM 분해면향판결적 Multi-h CPM 신호재파상위동보산법,위료유효계정소제출산법적성능,추도출료 Multi-h CPM 재파상위고계적수정극로미라한(MCRB)。방진결과표명,재교대다보륵빈솔급기변화솔적배경하,해재파상위산법적고계성능량호차능핍근기 MCRB。
Multi-h Continuous Phase Modulation with features of high spectral efficiency and good perform-ance of error resilience has broad application prospects. However, the synchronization issue has been one of the difficulties for Multi-h CPM receiver. Based on a existing single-h CPM carrier phase recovery algo-rithm,a decision-directed carrier phase recovery algorithm based on PAM decomposition for Multi-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 approach the MCRB.