Passive Millimeter Wave Detectors, Signal Processing And Target Recognition

This paper research is based on a passive millimeter wave detector engineering. A simulation experiment is carried out to acquire experimental data of target characteristic in the open air, and the paper analyses experimental data and investigates target signal characteristic in this condition. A module of target recognition is set up and algorithm of data pretreatment and target recognition is discussed in detail. The detailed content is as follows.Firstly, this paper introduces the theory and output signal expression of a passive millimeter wave detector, based on the theory of an AC all-power radiometer. A math model of the output signal of the detector is set up and simulated waveforms are given with PC.Secondly, the principle and design method of datum sample circuit are discussed in detail, which is used in the outdoor experiment. These experimental data are analyzed and character of the detector output signal is summarized. The characteristic of the target is extracted.Thirdly, comparison is done between traditional filter algorithm and wavelet threshold algorithm which are used in the data pretreatment in this paper to discuss the advantages and disadvantages.Finally, the target recognition system based on TMS320F2812 is designed.