摘要
在无线电监测的过程中,由于被处理信号的记录长度有限和其频域的离散性,在频谱分析中容易产生栅栏效应的现象,不利于无线电频谱资源的管理和应用。结合能量重心法和Rife算法的特点,提出了一种新的频率估计算法。首先对信号用能量重心法进行初步的计算和统计,得到信号的偏差值;其次对信号用M-Rife算法作第2次频率估计,并利用偏差值对第2次的频率估计值加以补偿。仿真结果表明,与传统Rife算法相比,所提算法得到的频率结果更为精准,且在频移键控(Frequency-Shift Keying,FSK)、相移键控(Phase-Shift Keying,PSK)、正交幅度调制(Quadrature Amplitude Modulation,QAM)信号中均可使用,具有一定的实用价值。
In the process of radio monitoring, due to the limited record length and discrete frequency domain of the processed signal, the fence effect is easy to occur in spectrum analysis, which is adverse to the management and application of radio spectrum resources. Combining the features of energy barycenter method and Rife algorithm, a new frequency estimation algorithm is proposed. First, the algorithm performs preliminary calculations and statistics on the signal using the energy centrobaric correction method to obtain the deviation values of the signal. Then, it does the 2nd frequency estimation of the signal by M-Rife algorithm, and compensates the 2nd frequency estimation with the deviation value. Simulation results indicate that the frequency results obtained by the proposed algorithm are more accurate compared with the traditional Rife algorithm, and can be used in FSK, PSK and QAM signals, which has certain practical value.
作者
毛芃晖
胡东
MAO Penghui;HU Dong(Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)
出处
《通信技术》
2022年第11期1408-1412,共5页
Communications Technology
关键词
载波频率
频率估计
能量重心法
Rife算法
无线电监测
carrier frequency
frequency estimation
energy centrobaric correction method
Rife algorithm
radio monitoring
