Title :
A Novel Space–Time Coding Alamouti Waveform Scheme for MIMO-SAR Implementation
Author :
Feng He ; Zhen Dong ; Diannong Liang
Author_Institution :
Coll. of Electron. Sci. & Eng, Nat. Univ. of Defense Technol., Changsha, China
Abstract :
This letter presents a novel extended space-time coding waveform scheme for multiple-input-multiple-output synthetic aperture radar implementation. The extensions include the fulfilling of the two Alamouti periods in one transmit duration minimizing the time-variant channel effect and the new form of the basic orthogonal waveforms. The main advantages of the proposed waveform scheme include ghost image prevention, cross-channel interference mutual cancelation, simultaneous transmission via orthogonal Tx channels, free selection of PRF, etc. The proposed techniques are verified by a simulation for the case of point-like targets.
Keywords :
MIMO radar; space-time codes; synthetic aperture radar; time-varying channels; MIMO-SAR; PRF; cross-channel interference mutual cancelation; ghost image prevention; multiple-input-multiple-output synthetic aperture radar; orthogonal Tx channels; orthogonal waveforms; point-like targets; space-time coding Alamouti waveform scheme; time-variant channel effect; Antennas; Azimuth; Chirp; Encoding; OFDM; Remote sensing; Synthetic aperture radar; Alamouti scheme; digital beamforming (DBF); multiple-input–multiple-output synthetic aperture radar (MIMO-SAR); multiple-input???multiple-output synthetic aperture radar (MIMO-SAR); short-term shift-orthogonal (STSO) waveform; space–time coding; space???time coding;
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2014.2333232
