Signal Processing Software Design Of Shipborne Rangefinder

Shipborne rangefinder system, the shipboard subsystem of the project named "position calibrating system of deep ocean acoustic tomography underwater buoy element",is designed to calculate the position of the underwater buoy element and monitor the various subsystems.As the core calculating software of the shipborne rangefinder system, the signal processing software mainly aimed at two aspects: accurately estimating the transmission delay of response signals generated by the underwater responder, then uploading the result as the input of the shipborne platform locating responders and self-positioning; communicating with the underwater buoy and responders by means of acoustic telecommands. This Dissertation focus on the signal processing software design of the shipborne rangefinder, and contains the complete procedure through the study of the algorithm's performance and the demonstration by the lake experiment.The detection technology based on adaptive narrow-band filters together with the variance of instantaneous frequency detector (VIFD) is introduced. The detection logics,which are applied to the high-precision transmission delay estimation and the acoustic remote control communication both in non-multipath and multipath channels are given. The research result under the condition of Matlab simulation indicates that the application of this detection method in the signal processing software of the shipborne rangefinder is effective.The development of signal processing software based on multicore is presented, and the theory of inter-core communication based on real-time sizeable operating systems SYS /BIOS is illustrated. On the basis of algorithm performance research and the multicore DSP software programs developing knowledge, the engineering software design on the TI's multicore DSP TMS320C6678 chip is introduced, including the realization of the network communication between the console platform and the signal processing software platform, the high-precision transmission delay estimation and the underwater acoustic remote control communication.The testing of underwater acoustic equipment in real water environment is essential for the project development. The main performance of the shipborne rangefinder signal processing software in the lake test is discussed; the experimental data is processed and analyzed meanwhile. The result indicates that the design of this dissertation performed precisely and reliable in the realization of anticipated functions.