| Signal processing techniques of LFMCW radar are intensively investigated in this thesis. Researches on range-velocity decoupling techniques in radar ranging and DOA estimation techniques based on the MUSIC algorithm are mainly focused on. Digital radar signal processing system based on FPGA and DSP chips is systematically designed and fabricated. The main works are as following:(1) Based on description of LFMCW radar system and waveform modeling, the range-velocity decoupling technique is studied in detail by using the plus and minus slope frequency modulation algorithm.(2) Measuring angle based on MUSIC algorithm is discussed. It is applied for the measuring angle technology of adopting uniformity linear array and uniformity circular antenna array radar system, with the combination of modeling and simulation about radar directing data. Simulation results validate the algorithm which are done by simulating experimentation on only measuring azimuth angle and measuring azimuth angle and pitching angle.(3) Researching for realization of software and hardware systems about LFMCW signal measuring the objects' distance and speed. The hardware system of digital signal processing is designed mostly with TMS320VC33 and EP1C6T144C8. The software design has two blue prints: First, EP1C6T144C8 is only used to control the scheduling, with all operation of signal processing being done in TMS320VC33. This design is used for DSP radar signal processing widely which has been debugged successfully, with giving the data analysis in this paper. Second, we can run the FFT in EP1C6T144C8 to improve the efficiency of signal processing, with TMS320VC33 together. The program designing has been well done in FPGA, so far. |
PDF Full Text Request