OFDM Based UWB Synthetic Aperture Through-wall Imaging Radar
OFDM Based UWB Synthetic Aperture Through-wall Imaging Radar
复制标题
基于OFDM的UWB合成孔径穿墙成像雷达
DOI：
10.1109/broadcom.2008.34
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Feham
中科院分区：
文献类型：
--
作者：
Zohra Slimane;Abdelhafid Abdelmalek;M. Feham
超宽带技术（UWB）是一种基于非正弦波的无线电新技术，具有很大的带宽。UWB技术具有双重优势：在建筑材料（混凝土、砖、木材等）中具有良好的穿透能力，以及用于雷达应用的高分辨率（几厘米）。最有前途的应用之一是通过墙壁和障碍物成像，这在军事层面上有多个出口（在攻击时，劫持人质.）在民事安全部门（在废墟下、火灾中搜寻人员.）。本文提出了一种可行性研究和性能评估的便携式UWB合成孔径雷达（SAR）穿墙成像。我们的系统是基于多波段OFDM方法，以确保雷达和通信的双重功能，在可能的远程操作。为了获得二维雷达图像，将反投影算法应用于SAR数据的时间反演。在Matlab/Simulink环境下进行了建模和仿真。结果表明，对于工作频率低于3GHz的雷达系统，可以实现信噪比为-10dB的高分辨雷达成像（约10 cm）。本文还讨论了UWB波形和OFDM载波数等参数对雷达系统最佳运行的影响。
Ultra wide band technology (UWB) is a new radio technology based on no sinusoidal waves, with very great bandwidths. UWB technology has double advantage: good capacity of penetration in building materials (concrete, brick, wood...), and high resolution (few centimetres) for radar applications. One of the most promising applications is the through the walls and the obstacles imaging, which has multiple outlets so much on the military level (at the time of attacks, taking of hostages...) that in the sector of civil safety (search for people under debris, in a fire...). This paper presents a feasibility study and a performance evaluation of portable UWB synthetic aperture radar (SAR) for through the walls imaging. Our system is based on multi-bands OFDM approach to ensure a double functionality of radar and communication, in possible remote operations. To obtain 2D radar images, back projection algorithm for time inversion was applied to SAR data. Modeling and simulation are carried out under Matlab/Simulink It was found that high resolution radar imaging (about 10 cm) are possible with a signal to noise ratio of -10 dB , for a radar system working below 3 GHz. Parameters such as UWB waveforms and number of OFDM carriers for an optimal radar system operation will also be discussed in this paper.