摘要
针对BPSK,QPSK,OQPSK信号的相位估计问题,提出了一种基于代价函数的相位估计算法。该算法不依赖符号同步信息,直接使用零中频信号进行相位估计。构造了一个代价函数并从理论上推导了代价函数与信号相位的关系,给出了基于代价函数的相位估计算法的实现方法,分析了算法的性能以及计算的复杂度。仿真结果表明,该算法能有效地估计BPSK,QPSK,OQPSK信号的相位,估计精度受搜索步长、信号长度和信噪比等参数的影响。
In view of the phase estimation of BPSK/QPSK/OQPSK signal,this paper proposes a phase estimation algorithm based on cost function.This algorithm utilizes zero intermediate-frequency signals without depending on symbol synchronization information to carry out phase estimation.Firstly,a cost function is constructed and the relationship between the cost function and the phase of signal is derived theoretically.Then the implementation method of phase estimation algorithm based on cost function is given.The performance and computational complexity of the method are analyzed.Lastly,the simulation results show that the algorithm can estimate the phase of BPSK/QPSK/OQPSK signal effectively and the correctness of the phase estimation is affected by search step,signal length and signal to noise ratio.
作者
周德强
闫红超
王春燕
王睿
ZHOU Deqiang;YAN Hongchao;WANG Chunyan;WANG Rui(Equipment Engineering Technology Research Laboratory,Shijiazhuang 050081,China;Hebei Vocational College of Rail Transportation,Shijiazhuang 050000,China;Instrumentation Engineering Technology Research Center of Hebei Province,Chengde 067000,China)
出处
《无线电工程》
2019年第4期293-297,共5页
Radio Engineering
基金
国家科技计划专项基金资助项目(2016QY10W1802)
