System modeling and performance analysis for detection fusion of multiple arrays under low SNR

For solving the distributed detection fusion problem of underwater target detection, when the acoustic channel signal-to-noise ratio (SNR) is low, a new system model for the multi-array detection fusion system is proposed. Based on the estimation of acoustic channel and the principle of likelihood ratio test, the performance of detection fusion is studied and compared based on the principle of NP when the binary phase shift keying (BPSK) and on-off keying (OOK) modes are used by the local arrays. Both the theory analysis and simulation indicate that under low SNR condition, the probing system established by the proposed model could improve the detection performance effectively, the proposed model has high theoretical reference value to the establishment of the underwater target detection system.