ZENG Xiang-neng, BAI Jie, HAO Ming-lei, et al. High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding[J]. Acta Electronica Sinica, 2014, 42(6): 1186-1193.
ZENG Xiang-neng, BAI Jie, HAO Ming-lei, et al. High Signal to Noise Ratio and High Resolution Wide Swath Imaging of MIMO-SAR Based on Almouti Space-Time Encoding[J]. Acta Electronica Sinica, 2014, 42(6): 1186-1193. DOI: 10.3969/j.issn.0372-2112.2014.06.023.
A new mode named azimuth-slow time waveform coding based on Alamouti space-time coding is presented.In azimuth
the total antenna array is divided into two sub-apertures for transmitting orthogonal waveforms that encoded by Alamouti coding matrix.In receiver
the total antenna array is divided into multiple sub-apertures forming multiple receive phase centers
which can be used for azimuth doppler ambiguity deduction
then the decoding of neighbor pulses can separate the orthogonal sub-waveforms thoroughly.This new method can enhance the echoes' SNR obviously and also realize high resolution wide swath imaging.The proposed system is of terseness
the aperture is fully explored
the SNR of echoes is improved
and the potential of multiple working modes simultaneously
etc.The simulation Results verify the system signal processing method.