基于两维相位编码的距离模糊抑制方法

李健; 孙光才; 景国彬; 邢孟道

doi:10.11999/JEIT161056

基于两维相位编码的距离模糊抑制方法

doi: 10.11999/JEIT161056

基金项目:

空间测控通信创新探索基金(201509A)，国家自然科学基金重大研究计划培育项目(91438106)

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- 被引次数: 0
出版历程
- 收稿日期: 2016-10-12
- 修回日期: 2017-05-22
- 刊出日期: 2017-09-19

Range Ambiguity Suppression Based on Two-dimensional Phase Coding

Funds:

The AeroSpace T.T..C. Innovation Program (201509A), The Major Research Plan of the National Natural Science Foundation of China (91438106)

摘要

摘要: 该文提出一种基于两维相位编码的距离模糊抑制方法，该方法通过在发射端发射一种两维相位编码的波形，接收端在进行匹配滤波时，距离模糊信号相对于目标信号而言在两维频谱上都会产生偏移。在信号处理阶段，可以针对此频谱差异构造滤波器，实现对距离模糊能量的有效抑制，降低整个测绘带内的距离模糊比，提高合成孔径雷达(SAR)图像质量。点仿真和面仿真结果都验证了该方法的有效性。
- 合成孔径雷达 /
- 距离模糊 /
- 距离模糊比 /
- 相位编码
Abstract: Based on a two-dimensional phase coding, a novel range ambiguity suppression method is proposed. By transmitting two-dimensional phase coded signals and demodulating the received signals, the two-dimensional spectrum of the range ambiguity is shifted along both range and azimuth directions. Considering the range frequency and Doppler oversampling, the spectrum of the range ambiguity located outside the data region of spectral support can be filtered out, which suppresses the range ambiguity. It allows for decreasing of the Range Ambiguity to Signal Ratio (RASR) and upgrading of the SAR image quality. Simulation results for point targets and distributed targets validate the effectiveness of the proposed method.
- SAR /
- Range ambiguity /
- Range Ambiguity to Signal Ratio (RASR) /
- Phase coding

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参考文献(21)

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