A Low SNR and Fast Passive Location Algorithm Based on Virtual Time Reversal

In order to achieve fast and accurate passive location of the target radiation source, this paper puts forward a Virtual Time Reversal Method Based on Uniform Linear Array (ULA-VTR) algorithm. This framework employs time reversal focusing theory, which does not require physical transmission signals pre-estimation channel realize direction finding. The above principle is utilized perform source signal through uniform linear sensor array for detection. article provides model virtual retransmission process in first place. Then utilizes ULA-VTR establish dual-station derives coordinate transformation equation find its observation angle, addition, establishes system obtaining site source. Ultimately, analyses computational complexity algorithm adopts Geometric Dilution Precision(GDOP) discuss positioning performance. experimental results indicate that technique presented has higher accuracy under low SNR compared with other techniques.