Research On Key Techniques Of Missile-Borne MMW Radar Of Dual-mode Guidance Based On Multicore DSP

With the development of military technology, the air combat is facing increasingly complexbattlefield environment. Thus the missile-borne radar system aiming at target detection and self-guidance is required to be constantly updated. More detailed information is extracted from echo of theground target by the radar system. The missile-borne radar system is not only confined to thetraditional "point target" location, other information such as one dimensional range, angle, speed andelse will be more concerned. With these information extracted from the target to achieve the goal ofhigh-resolution imaging, HRR provides abundant of reference data for subsequent process of targetidentification, tracking and self-precision-guidance. The millimeter wave has advantages such assmall antenna, narrow beam, large bandwidth, good lateral resolution, and good anti-stealthperformance, so millimeter-wave radar guidance technology is widely applied in the air-to-groundmissiles.This thesis is mainly about research of dual-mode millimeter-wave radar technology based onhigh-performance multi-core DSP digital signal processing platform. The principle of compound ofpulse Doppler system and high-resolution imaging system is discussed to improve the performanceand accuracy of the missile tracking targets in the horizontal range of6km away from the goal. Aradar signal processing hardware platform architecture is proposed, and the multicore softwareprogramming with echo data simulation based on this platform is done. Finally the results of thesimulation are analyzed in terms of accuracy and real-time performance.This paper studies the basic principle of high-resolution radar imaging system, analyzes theorigin of the distance-speed coupling phenomena in the target echo of SFW, and discusses the methodof target velocity estimation named double-frame SFW with varied PRT. On this basis, the dual-moderadar system designed by means of PD high-resolution velocity estimation characteristic combiningSFW high-resolution range estimation feature to improve system performance is proposed. Also, thepaper introduces the design of complete target searching and tracking program with different signalprocessing methods in each stages.Based on the theoretical study of dual-mode millimeter-wave radar technology, this thesisanalyzes and designs the architecture of the signal processing hardware of HRR based on theDSP+FPGA. Within the architecture, the TMS320C6678multicore DSP works as the core processorof signal processing, while the XC6VLX75T series FPGA works as coprocessor. Then it proposes radar system parameters, and sample precision of ADC device. It also studies the advantages of themulticore processor on performance compared to single-core systems, as well as the technicalchallenges brought to the digital signal processing category by application of multi-core technology.Finally, on the hardware platform of HRR based on the multi-core DSP TMS320C667, this papergives the performance test and the parallel algorithm design of high resolution range profile (HRRP).Then the simulation results are analyzed on aspects of target imaging and velocity precisions, andwith real-time performance of multi-core digital signal system included. Experimental results showthat the compound system of target detection is feasible and effective, and has a good real-timeperformance with high resolution of the range profile.