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International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 578792, 9 pages
Research Article

Property Analysis of MIMO-Based Missile-Borne Forward-Looking SAR

National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China

Received 28 February 2014; Revised 18 June 2014; Accepted 27 June 2014; Published 14 July 2014

Academic Editor: Wei Xu

Copyright © 2014 Yachao Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


As a special multiple-input multiple-output (MIMO) radar networking mode, missile-borne forward-looking synthetic aperture radar (MFL-SAR) has many potential applications. This paper describes and analyzes properties of this new configuration. Range history and Doppler history are analyzed and derived using the designed geometric configuration. Then the expressions of range and Doppler resolution are determined based on the validity of two-dimensional (2D) resolution imaging capability. To help to design the proper system and motion parameters of this configuration, key parameters affecting the imaging ability are found out. Due to high velocities and accelerations of both transmitter and receiver, high-order terms in the slant range equation should be kept to reduce the approximation error. The range resolution and Doppler resolution of MFL-SAR are both space-variant and time-variant owing to the complexity of this configuration. The tiny changes of 2D resolution during the synthetic aperture time should be considered when designing the imaging algorithm of MFL-SAR.