Short Distance Radar Detection And Tracking Technology Research

Virtual reality is a technique with immersion, interactivity and imaginative features developed rapidly in recent years. With the rapid development of virtual reality technology, the application of virtual reality technology has break through the traditional field, such as military and space development, and gradually expanded to scientific computing visualization, architectural design, industrial design, education, entertainment, medicine and other fields. In a virtual reality system, sensor is a bridge between connect the external environment and virtual environment, which can feel be measured object information and able to combine felt contents with related mathematical rules for ease of transport, handling, storage, recording and control signals. This paper aimed at virtual golf system, which is a virtual reality system combined the virtual reality technology with golf sports. System uses sensors real-time transmission, storage, and record the golf in real environment parameters, and real-time rendering and reduction in the virtual scene golf movement process, the whole system has a strong sense of interactivity and immersion. However, in the project due to golf movement high-speed and short flight time in the external environment, golf parameters is difficult to measuring by high-speed cameras in real time and accurate measurement, to a certain extent, affect the performance of the virtual golf system. Therefore, put forward using radar to measure flight golf motion parameters, and thus improve the performance of the whole virtual golf system.First of all, the paper combined with the need of virtual golf project tasks, study the working principle of radar and species. On the basis of analyzing the working principle of the radar system, paper compared the current waveform commonly used in radar system, selecting linear frequency modulation pulse waveform, finally completed the linear frequency modulation pulse radar waveform design.Then, the thesis researched linear frequency modulation pulse radar echo signal processing and target tracking technology. At the completion of linear frequency modulation pulse waveform design and on the basis of analysis of the target echo characteristic in golf, get the target echo signal. Due to doping of clutter in the echo signal and interference, by moving target display technology and pulse compression technology can improve the system bandwidth and the signal-to-noise ratio, the clutter effectively suppressed. Then the paper studied the target tracking technology, analyzed the present commonly used method of target tracking performance, golf model set. In the end, on the basis of the target motion information before, tracking method was proposed based on IMM, through the experimental simulation compared the effectiveness of this method.Finally, in order to testing linear frequency modulated radar detection and distance accuracy, the thesis constructed the FPGA hardware platform, the results error analysis also related.