Design and realizatiom of receiver based on eastimation of acoustic target signal intensity

With the development of modern noise reduction technology, the noise levels of the surface ship and underwater submarine are lower, making the target signal weaker and weaker. When knowing target distance and sonar system parameters, in order to acquire target signal noise level, and not lose the effective information of target signals, this paper introduces a method of estimating target signal intensity of sound source. Its characteristic is adopting diode detection and level ascension circuit. After the processing of MCU (MSP430F5438), target signal intensity is got. The designed receiver has advantages of simple structure, reliable performance, good realtime performance and low power-consumption. Test results of the entire prototype system in anechoic tank show that the maximum error of received source level is not more than 1 dB when the emission source level is between 100dB and 180dB. The designed receiver can meet the designing requirements of modern underwater receiver.