基于兩維相位編碼的距離模糊抑制方法

李健; 孫光才; 景國(guó)彬; 邢孟道

doi:10.11999/JEIT161056

基于兩維相位編碼的距離模糊抑制方法

doi: 10.11999/JEIT161056

基金項(xiàng)目:

空間測(cè)控通信創(chuàng)新探索基金(201509A)，國(guó)家自然科學(xué)基金重大研究計(jì)劃培育項(xiàng)目(91438106)

計(jì)量
- 文章訪問(wèn)數(shù): 1228
- HTML全文瀏覽量: 165
- PDF下載量: 276
- 被引次數(shù): 0
出版歷程
- 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: 該文提出一種基于兩維相位編碼的距離模糊抑制方法，該方法通過(guò)在發(fā)射端發(fā)射一種兩維相位編碼的波形，接收端在進(jìn)行匹配濾波時(shí)，距離模糊信號(hào)相對(duì)于目標(biāo)信號(hào)而言在兩維頻譜上都會(huì)產(chǎn)生偏移。在信號(hào)處理階段，可以針對(duì)此頻譜差異構(gòu)造濾波器，實(shí)現(xiàn)對(duì)距離模糊能量的有效抑制，降低整個(gè)測(cè)繪帶內(nèi)的距離模糊比，提高合成孔徑雷達(dá)(SAR)圖像質(zhì)量。點(diǎn)仿真和面仿真結(jié)果都驗(yàn)證了該方法的有效性。
- 合成孔徑雷達(dá) /
- 距離模糊 /
- 距離模糊比 /
- 相位編碼
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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參考文獻(xiàn)(21)

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