ISAR imaging with wideband V-FM signals

This paper focuses on the two-dimensional (2D) high-resolution image reconstruction with wideband V-style frequency modulation (V-FM) signals, where the range compression of the received signals is achieved by the dual-channel dechirping and the azimuth compression is done via the traditional Fourier transform (FT). The superiority of V-FM signals are two folds: 1) The system ambiguity appeared in range and velocity can be conquered since V-FM signals have “thumbtack” ambiguity function; 2) the wideband V-FM signals can reduce the sampling rate significantly compared with the matched-filtering-based imaging methods. Finally, simulated trials with the target of point scatterers modeling are utilized to demonstrate the effectiveness of V-FM signals in ISAR imaging.