Coherent integration weak target detection algorithm based on short time sliding window

For the problem of weak target detection under lower signal noise ratio in radar detection system, a key technique is to enhance target echo energy by long time coherent integration. During the integration period, the target echo may occur range migration with integration time increasing. Direct coherent integration will lead to echo energy spread and deteriorate integration effect. A coherent integration algorithm based on short time sliding window is proposed in this paper. Radar signal is formed into a first in first out queue. The queen is continually renewed by the sliding window. The produced queens are coherent integrated at last. Simulation result shows that the proposed algorithm can prevent range migration efficiently and improve coherent integration capability.