Analysis of Radar Signals Induced by Symmetric Antenna Interference Region of Transponder

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Analysis of Radar Signals Induced by Symmetric Antenna Interference Region of Transponder

Yang, Bo / Meng, Lianwen / Liang, Yunfeng / Zhang, Yongsheng / Zhou, Hui

Abstract For researching the effect of signal interference induced by symmetric antennas of the rotating target with the velocity measurement radar (VMR), we analyzed the factors including AGC, Doppler, micro-Doppler and error voltage of VMR in theory in this paper, and proposed a method for compute the difference of Doppler between before and after the interference region. Then processed the radar data to find secrets about the factor of AGC, Doppler and error voltage when radar antennas are in interference region, obtained the micro-Doppler and its period using the method of wavelet transform and auto-correlation. There was a conclusion through theoretical analysis and data validation, that is, the AGC value fluctuated greatly with a descending range of 10~20 dB, the Doppler jumped greatly, and the error of voltage enlarged obviously when radar antennas in interference region, the micro-Doppler appeared two peak values (positive and negative) at the moment before and after the interference region.