Weak Moving Target Detection Based on Multi-Frame Coherent Integration Algorithm
2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)（2023）
Abstract
The long-time coherent integration algorithm is an effective way to improve the detection performance of weak target. However, due to the limited pulses of radar echoes in a single frame, the Signal-to-Noise Ratio (SNR) accumulated by the inter-frame integration method cannot satisfy the detection requirements. To solve this issue, a multi-frame coherent integration (including intra-frame and inter-frame integration) method is proposed. This algorithm has two stages. Firstly, the inter-frame range walk is corrected by the frequency domain correction method. After range correction, a phase compensation method is proposed to settle the phase discontinuity between adjacent frames. Secondly, the SNR of the target can be improved significantly by the multi-frame coherent integration method. The experimental results show that the proposed method outperforms the multi-frame noncoherent integration method and multi-frame moving target detection method.
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Key words
detection performance,detection requirements,frequency domain correction method,including intra-frame,inter-frame integration method,inter-frame range walk,long-time coherent integration algorithm,multiframe coherent integration algorithm,multiframe coherent integration method,multiframe moving target detection method,multiframe noncoherent integration method,phase compensation method,range correction,Signal-to-Noise Ratio,SNR,weak target
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