| 引用本文: | 赵志勇,常文革,黎向阳,等.去调频处理中空变相位误差补偿方法.[J].国防科技大学学报,2014,36(3):169-176.[点击复制] |
| ZHAO Zhiyong,CHANG Wenge,LI Xiangyang,et al.Range-dependent phase error compensation of dechirp[J].Journal of National University of Defense Technology,2014,36(3):169-176[点击复制] |
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| 去调频处理中空变相位误差补偿方法 |
| 赵志勇, 常文革, 黎向阳, 贾高伟 |
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(国防科技大学 电子科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 调频连续波具有较长的脉宽和较大的信号带宽，通常采用去调频的处理方式，但是，去调频的处理会引入空变的相位误差。从去调频的处理方式入手，根据发射信号相位误差缓变的特点，提出了依据发射信号相位误差模型补偿空变相位误差的方法，并在理论上对该方法进行了推导。该补偿方法分为两步，从差频信号中去除发射信号相位误差，在残余视频相位误差校正之后，通过与补偿函数相乘去除剩余的相位误差。仿真和实测的实验结果表明，该方法能够克服目标距离的限制，有效地补偿空变相位误差带来的影响，提高脉压水平。提出的误差补偿方法能够很好地平衡系统负载、误差补偿精度和算法开销，具有较强实用性。 |
| 关键词: 调频连续波雷达 相位误差补偿 去频调 |
| DOI：10.11887/j.cn.201403030 |
| 投稿日期：2013-11-13 |
| 基金项目: |
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| Range-dependent phase error compensation of dechirp |
| ZHAO Zhiyong, CHANG Wenge, LI Xiangyang, Jia Gaowei |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| To reduce the pressure of data processing, the dechirp operation is adopted. However, dechirp will result in range-dependent phase errors in the beat signal. an algorithm to compensate the range-dependent phase error is proposed, using the phase error extracted from the transmitted signal with the supposition that the phase error varies slowly. The compensation approach is executed in two steps: first, compensating the phase error involved by the transmitted signal after dechirp; second, compensating the residual phase error after RVP correction. Both the simulation and the real data experiments suggest that the proposed algorithm is effective. |
| Keywords: FMCW radar phase error compensation dechirp |
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