OFDM waveform diversity design for MIMO SAR imaging

Multiple-input and multiple-output (MIMO) synthetic aperture radar (SAR) should use the waveforms that have a big product of time-width and frequency-width and a constant modulus. In this case, the Barker code-based waveforms are not suitable. In this paper, a kind of orthogonal frequency diversion multiplexing (OFDM) chirp diverse waveform is presented for MIMO SAR imaging. The waveform performance is evaluated by the radar ambiguity function. Numerical results show that the waveform has the superiorities of high range resolution, constant modulus, large time-banwidth product, implementation simplicity, and low ambiguity function sidelobes.

[1]  Wen-Qin Wang.  Near-Space Remote Sensing - Potential and Challenges , 2011, Springer Briefs in Electrical and Computer Engineering.

[2]  Wen-Qin Wang,et al.  Mitigating Range Ambiguities in High-PRF SAR With OFDM Waveform Diversity , 2013, IEEE Geoscience and Remote Sensing Letters.

[3]  Wen-Qin Wang,et al.  Virtual Antenna Array Analysis for MIMO Synthetic Aperture Radars , 2012 .

[4]  Wenqin Wang.  Applications of MIMO Technique for Aerospace Remote Sensing , 2007, 2007 IEEE Aerospace Conference.

[5]  Yazhou Wang,et al.  CW and Pulse–Doppler Radar Processing Based on FPGA for Human Sensing Applications , 2013, IEEE Transactions on Geoscience and Remote Sensing.

[6]  Pierfrancesco Lombardo,et al.  Exploiting MIMO SAR Potentialities With Efficient Cross-Track Constellation Configurations for Improved Range Resolution , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[7]  Hai Deng,et al.  Polyphase code design for Orthogonal Netted Radar systems , 2004, IEEE Trans. Signal Process..

[8]  Werner Wiesbeck,et al.  Investigation of a New Multifunctional High Performance SAR System Concept Exploiting MIMO Technology , 2008, IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium.

[9]  Wen-Qin Wang,et al.  Waveform-Diversity-Based Millimeter-Wave UAV SAR Remote Sensing , 2009, IEEE Transactions on Geoscience and Remote Sensing.

[10]  Soo H. Rho,et al.  Ground moving target displacement compensation for DPCA based SAR-GMTI system , 2009, 2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar.

[11]  Wen-Qin Wang.  Space–Time Coding MIMO-OFDM SAR for High-Resolution Imaging , 2011, IEEE Transactions on Geoscience and Remote Sensing.

[12]  M. Nayebi,et al.  Orthogonal frequency-division multiplexing radar signal design with optimised ambiguity function and low peak-to-average power ratio , 2009 .