Design And Implementation Of Pulse Dopplersubsystem Of Missile-borne MMW Radar In Dual Mode Based On Multi-core DSP

Pulse Doppler radar system can extract and process the target information by taking advantage of Doppler effect generated by the relative movement between the target and the radar. As a coherent system, the PD systems use multiple pulse coherent accumulation, which not only make the high resolution in speed available, but also have a great ability to suppress ground clutter jamming. This thesis is centered on the issue of terminal guidance to the ground moving target by using Missile-Borne millimeter wave Radar in Dual Mode. There are plenty of discussion and research on the principle of PD radar subsystem and the parameter configuration aiming at realizing the joint guidance design of the Pulse Doppler system and high-resolution imaging system. On the basis of theoretical research, a radar signal processing hardware platform architecture is proposed, and signal processing of the PD subsystem based on TMS3220C6678 multi-core DSP is implemented.Firstly, the characteristics of PD radar system is analyzed in this thesis and the basic principle and signal characteristics of Pulse Doppler radar is expounded, meanwhile a detailed analysis of the process and the key technology of radar echo signal processing is given out, including digital I/Q demodulation, Sum and difference patterns of amplitude dual-plane mono-pulse target angle tracking, pulse compression of the LFM signal, moving target detection, CFAR and etc. Therefore, the simulation model of PD Radar signal processing system is structured.Secondly, according to analysis of the theory of PD radar, the thesis studies on the project of the ammunition millimeter-wave dual mode guidance radar. The reason why ammunition millimeter-wave dual mode guidance radar needs dual-mode guidance and how to make the system of double system work together are analyzed. And the mode switch at the different stages of the terminal guidance is on the detailed analysis and the project is designed, which mainly focused on the parameters of PD radar signal waveform and the key components of the Radar system at the following three stages of PD Radar, the stage of target search and scanning, the stage of remote search, and the stage of short-range high resolution imaging system.What's more, on the basis of the theoretical design and reasoning of the dual mode guidance, the hardware framework of dual mode guidance radar signal processing system and system overall scheme design is given out. And the analysis and argumentation of the hardware design parameters of the dual mode guidance radar is presented. Also, the task division of labor and work content of the various modules within the framework is expounded.Finally, this thesis accomplishes several simulations according to the PD radar parameter design in each stage in the process of the dual mode joint guidance radar design based on the TMS320C6678 multi-core DSP. Within the architecture based on EDMA+IPC, the core algorithm of Pulse Doppler Subsystem of Missile-Borne MMW Radar in Dual Mode terminal guidance is carried out in parallel, such as velocity tracking, Angle tracking and dual mode joint range tracking. Meanwhile,the results of the simulation are analyzed in terms of accuracy and real-time performance.