【摘要】 首先系统总结了高阶循环累积量估计载波频率的研究成果,从理论上推导出MASK、MPSK和MFSK信号的测频原理,并对平方降价法的性能进行了测试,指出了平方降阶法的局限性。然后以16QAM信号为例,从理论上证明此方法同样可以应用于MQAM的载波频率估计,并进行了仿真验证,从而扩展了此方法的适用范围。最后,进行了小结,指出测频方法存在的问题及解决方法。更多还原

【Abstract】 First, the research results of carrier frequency estimation based on the high-order cyclic cumulant are systematically summarized, and the principles for carrier frequency estimation of MASK, MPSK and MFSK signals are theoretically deduced. Meanwhile, the performance of square-order reducing is tested and its limitation is also pointed out. And then with 16QAM signal as a sample, the method is theoretically proved applicable to the carrier frequency estimation of MQAM signal. And the simulation results shows that the method is correct. Finally, the paper makes a brief summary, pointing out the problem existing in the estimation method and giving the solutions.更多还原