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

Volume

12

Issue

2

fYear

2015

fDate

Feb. 2015

Firstpage

229

Lastpage

233

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;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2014.2333232

Filename

6856196