| 摘要: |
| 为了解决多套相邻智能雷达设备同时使用时的相互干扰问题，提出了直接序列扩频体制雷达的方案，利用相关处理分离同频发射机的回波，提出了由相关函数生成距离-多普勒图像的信号处理方法。建立了直接序列扩频超声雷达手势识别系统的收发信号和收发机的模拟模型，其中提出的滤波器收发器模型仿真了有限带宽效应，发射波回溯的手势回波生成算法支持各种复杂调制方式的仿真。模拟实验表明采用所提信号处理方法的直接序列扩频雷达能够实现不同发射器信号的分离，并分别得到正确的手势距离-多普勒图像，达到15%以内的测量误差和约4.03cm的分辨率。 |
| 关键词: 智能雷达；信号处理；直接序列扩频(DSSS)；手势识别 距离 多普勒图像(RDM) |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（61604014）；深圳市知识创新计划基础研究（自由探索）项目（JCYJ20180306170414910） |
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| Modeling and signal processing for direct sequence spread spectrum intelligent radars |
| MENG Jie,LI Xiangyu,YIN Shujuan |
| (School of Applied Science,Beijing Information Science and Technology University;Research Institute of Tsinghua University in Shenzhen) |
| Abstract: |
| In order to solve the problem of mutual interference when multiple sets of adjacent intelligent radar devices are used at the same time,a radar scheme of direct sequence spread spectrum(DSSS) system is proposed,in which the echoes of the same frequency transmitter are separated by correlation processing.Moreover,the signal processing method of generating range Doppler map(RDM) from correlation function is proposed.The simulation models of the transmitting and the received signals and the transceiver of the DSSS ultrasonic radar gesture recognition system are established,in which the proposed filter transceiver model simulates the effects of limited bandwidth,and the gesture echo generation algorithm of transmitted wave backtracking supports the simulation of various complex modulation modes.The simulation experiments show that the DSSS radar adopting the proposed signal processing method is able to separate the signals from different transmitters,and obtain the correct gesture RDMs,with the measurement error within 15% and the resolution of about 4.03 cm. |
| Key words: intelligent radar signal processing direct sequence spread spectrum(DSSS) gesture recognition range Doppler map(RDM) |
《电讯技术》编辑部 