| 摘要: |
| 为了解决线性调频脉冲多普勒雷达的距离模糊和速度模糊问题，采用了高脉冲重复频率的方式发射正交频分线性调频脉冲信号，并给出了一种用于解模糊的回波数据重排方案。这种重排方式可以解决最大无模糊距离和最大无模糊速度之间的矛盾，对重排后得到的数据矩阵进行脉冲压缩、动目标检测，最终得到的峰值可无模糊地体现目标的距离和速度。仿真结果证明了所提方法的有效性和可行性。 |
| 关键词: 脉冲多普勒雷达 正交频分线性调频信号 距离模糊 速度模糊 |
| DOI： |
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| 基金项目:浙江省衢州市政府专项资助项目(2021D009) |
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| A method of ambiguity resolution for PD radar using OFDM-LFM signals |
| YAN Jihong,DONG Haiyang,ZHAI Jianshu,YANG Li |
| (1.Yangtze Delta Region Institute(Quzhou),University of Electronic Science and Technology of China,Quzhou 324000,China;
2.School of Information and Communication Engineering,University of Electronic Science and
Technology of China,Chengdu 611731,China) |
| Abstract: |
| In order to solve the problem of range ambiguity and velocity ambiguity of linear frequency modulation(LFM) pulse Doppler(PD) radar,high pulse repetition frequency(HPRF) is used to transmit orthogonal frequency division multiplexing linear frequency modulation(OFDM-LFM) pulse signals,and an echo data rearrangement scheme for ambiguity resolution is given,which can solve the contradiction between the maximum unambiguous distance and the maximum unambiguous velocity.Pulse compression and moving target detection(MTD) are performed on the rearranged data matrix,and the final peak value can reflect the range and velocity of the target without ambiguity.Simulation results show the effectiveness and feasibility of the proposed method. |
| Key words: pulse Doppler radar OFDM-LFM signal range ambiguity velocity ambiguity |
