Conventional range-Doppler (RD) inverse synthetic aperture radar (ISAR) imaging method utilizes coherent integration of consecutive pulses to achieve high cross-range resolution. It requires the radar to keep track of the target during coherent processing intervals (CPI). This restricts the radar’s multi-target imaging ability, especially when the targets appear simultaneously in different obse...

This paper describes a convenient technique of precise radial velocity estimation for inverse synthetic aperture radar (ISAR). In order to keep both the range profile and phase history of the echoes coherent, direct sampling with high sampling rate using high performance analog-to-digital converter and matched-filter correlation processing in pulse compression are used for the ISAR system. Due ...

Feature-based classification of targets in SAR images by using ISAR measurements was studied, based on polarimetric SAR and ISAR data acquired with the MEMPHIS radar system of FGAN-FHR. The data contained one T-72 battle tank, one BMP combat vehicle, and several confusers. The resolution was 75 cm. Nine features were studied of which four were analyzed: area, coefficient of variation, weighted-...

Abstract In general, the method of conventional motion compensation for inverse synthetic aperture radar (ISAR) imaging is divided into translational (TMC) and rotational (RMC) in sequence. TMC premise most critical procedure range alignment. However, deviation echo correlation results poor performance alignment under low signal-to-noise ratio (SNR). Therefore, a new high-resolution ISAR azimut...

Accurate translational motion compensation (TMC) is the key procedure of inverse synthetic aperture radar (ISAR) imaging. Under condition sparse aperture, correlation adjacent pulses severely destroyed, which brings a few challenges to TMC and Thus, this paper proposes novel method for ISAR In technique, signal model joint phase adjustment imaging established first. Then, process designed. That...

Interrupted-sampling repeater modulation (ISRM) can generate multiple virtual target images by sampling and forwarding radar signals to confront the inverse synthetic aperture (ISAR). However, repeating delay is unavoidable system complex. Moreover, numerous works mainly discuss ISAR image deception based on periodic modulation, effect relatively limited. Active frequency selective surface (AFS...

Isar is an extension of the theorem prover Isabelle with a language for writing human-readable structured proofs. This paper is an introduction to the basic constructs of this language.

We investigate the complexity of reasoning with monotonic inheritance hierarchies that contain, beside ISA edges, also ROLE (or FUNCTION) edges. A ROLE edge is an edge labelled with a name such as spouse-of or brother-of. We call such networks ISAR networks. Given a network with n vertices and m edges, we consider two problems: (P,) determining whether the network implies an isa relation betwee...

Interferometric inverse synthetic aperture radar (InISAR) imaging for sparse-aperture (SA) data is still a challenge, because the similarity and matched degree between ISAR images from different channels are destroyed by the SA data. To deal with this problem, this paper proposes a novel SA-InISAR imaging method, which jointly reconstructs 2-dimensional (2-D) ISAR images from different channels...

Spectrum analysis (SA) plays an important role in radar signal processing, especially imaging algorithm design. Because it is usually hard to obtain the analytical expression of spectrum by Fourier integral directly, principle stationary phase (POSP)-based SA applied approximate this integral. However, POSP requires vary rapidly, which not case circular synthetic aperture (SAR) and turntable in...