Combination-Correlator Technology for Improving Detection Capability of Multi-Highlight Targets

Addressing the problems in detecting weak echo targets by torpedo homing system , we analyze the working principle of time domain compression repetition correlator. By adopting the correlator, process gain and highlight parameter estimation precision are improved by accumulating and multiplying multi-highlight information. Double-channel time domain compression repetition and echo combination-multiplier technology and double-channel time domain compression repetition and echo combination-correlator technology are proposed, and corresponding theoretical analysis and simulation are performed. Simulation results indicate that the two technologies can raise 3 dB process gain compared with the time domain compression repetition correlator, and the estimation precision of highlight parameters is also improved. The validity and practicality of the proposed methods are verified by real-running test of torpedo.