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Bottom reverberation modeling often regards seafloor as a flat surface, but in practical application it is not the case, simply regarding seafloor as a plane to model is not accurate. In order to solve this problem, reverberation spectrum modeling of arbitrary bottom shape has been built and a simplified calculation method regarding the simulation of the modeling has been provided. By dividing sea...
To improve the localization accuracy in a small scale of indoor environment a passive target localization method is presented. The indoor target localization system is consisted of four wireless transmitters which could transmit known signals. The receiver meaning the target passively receives four signals from the four signal transmitters and then calculates the propagation time differences of arrival...
According to the direction estimation problem encountered in radar, sonar and other acoustic fields, the paper introduces a design of a sound localization system based on SOPC. This system works on the FPGA platform of Altera Cyclone III family by building a SOPC system, which can take fully advantage of the flexible customization specifications of the SOPC and the powerful parallel signal processing...
This paper describes a dynamic multi-target simulating system for active sonar, a system for simulating the signal received by multiple receive hydrophones of sonar for a scenario with multiple targets from different directions. Significant challenges in the system design are the capabilities of real-time processing and high-speed data transmission. Due to the demand of the system, the embedded soft...
The mainly task of sonar simulation signal source is to generate real time dynamic echo signal using the underwater acoustic signal properties, the relative motion properties and the underwater environment noise. Sonar simulation signal source is applied in a semi-physical simulation system. So real time ability and high-speed transmission is the main factors in the system design. This paper using...
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