Analysis of Influence of Noise Interference on Frequency Measurement Results of IFM Receiver
Chao Li, Bo Peng, Ji-Kang Sun · 2022
With the rapid development of electronic information technology, the electromagnetic environment of modern battlefield is becoming more and more complex. Due to the characteristics of high sensitivity and wide frequency band reception, the IFM receiver can easily detect the interference noise while detecting the target signal. However, due to the poor ability of the IFM receiver to process simultaneous arrival signals, when the receiver receives both the interference noise and the target signal at the same time, the interference noise will definitely have a serious impact on the frequency measurement results. Aiming at this problem, this paper quantitatively analyzes the influence of noise interference on the frequency measurement results of the IFM receiver. The simulation results show that the RMSE of the frequency measurement of the IFM receiver increases with the frequency difference between the interfering noise and the target signal. Moreover, the larger the jamming to signal ratio at the input end of the IFM receiver, the larger the RMSE of the frequency measurement.