Research Of Passive Location On The Basis Of Doppler Changing Rate

The core of passive location system is the passive locating method. Doppler changing rate is based on kinematics principle, and using information of re-kinematics between target and observation station to make it easy and intuitionistic. So it is better than the others. The paper selects the Doppler changing rate method in naval passive location system.After selecting the method, the paper introduces the principles of Doppler changing rate detailedly. And then, through adding the Doppler frequency f_d, wecan work out the target's speed in 3-D space. For improving the locating accuracy, the EKF algorithm is introduced to process the initial locating results. The computer simulation results prove that the modified algorithm could meet the demand of the novel passive detecting radar system when the distance is between 10km and 150km, and the angle error is not larger than 5° . Following the increase of SNR, the accuracy gets more and more accurate.Based on the request of the algorithm, we design a hardware system and use the TMS320C6201 DSP as the system processor. Then we introduce the design of system in hardware and software, sketch map and the flow chart. And then, we discusses two important points. One is the serial communication between two DSPs, the other is serial communication between DSP and PC. Combining with my experience in system's design and debugging, we discuss the problems that we should pay attention to.