Mitigating Range Ambiguities in High-PRF SAR With OFDM Waveform Diversity
Mitigating Range Ambiguities in High-PRF SAR With OFDM Waveform Diversity
复制标题
利用 OFDM 波形分集减轻高 PRF SAR 中的范围模糊度
DOI：
10.1109/lgrs.2012.2193870
复制
发表时间：
2013-01-01
影响因子：
4.8
通讯作者：
Wang, Wen-Qin
中科院分区：
文献类型：
--
作者：
Wang, Wen-Qin
距离模糊抑制是高脉冲重复频率合成孔径雷达（SAR）面临的一个技术难题。该文提出了一种利用正交频分复用（OFDM）波形分集抑制高重频SAR距离模糊的实用方法。详细介绍了系统方案、波形设计和距离模糊信噪比性能。该方法消除了模糊性，而不是像其他技术那样只是抑制它们。所提出的OFDM线性调频分集波形具有大的时间带宽积。计算机仿真结果验证了该方法的有效性。尽管OFDM雷达近年来受到了广泛关注，但在应用OFDM概念来减轻高重频雷达距离模糊方面似乎做得很少，这也是这封信的主题。
Range-ambiguity suppression is a technical challenge for high-pulse-repetition-frequency (PRF) synthetic aperture radar (SAR). This letter proposes a practical approach to mitigate the range ambiguities in high-PRF SAR by using the orthogonal frequency-division multiplexing (OFDM) waveform diversity. The system scheme, waveform design, and range-ambiguity-to-signal-ratio performance are detailed. The approach eliminates the ambiguities, instead of just suppressing them like other techniques. The proposed OFDM chirp diverse waveform has a large time-bandwidth product. It is validated by computer-simulation results. Although OFDM radar has received much attention in recent years, there appears to be little work done in applying OFDM concepts to mitigate high-PRF radar range ambiguities, as is the subject of this letter.