Study On Passive Sonar Broadband Detection And Display Technology

The function of sonar display console is to present the result of signal and information processing on the screen and to supply the information about the watched field to the operator. The sonar display console plays an important role in displaying the result of signal and information processing suitable for the operators. Supported by a project, this thesis presents the technology about passive sonar display and signal detection in design of the sonar display console. The key point of the research is that, although the detection performance of sonar signal processing subsystem has been optimized, there is still a space of improvement which can be achieved by the means of display and post-processing.The research includes as follows. Firstly, introduce the design of sonar display, trace-to-trace correlation and gray scale display, develop a new method of gray scale based on signal noise ratio. And next, discuss array signal processing and image processing in order to improve the display. Finally, develop a software of sonar display simulator based on Object Oriented Programming, with which the sonar display console is simulated and the performance of sonar signal is tested.Computer simulation has verified the improvement of the proposed methods preliminarily.