Moving target indication

About: Moving target indication is a research topic. Over the lifetime, 2653 publications have been published within this topic receiving 32435 citations.

Adaptive airborne MTI with two-dimensional motion compensation

Abstract: Clutter returns received by an airborne radar exhibit a Doppler bandwidth which depends on the platform speed, beamwidth and wavelength Echoes of slow targets may, therefore, be buried in the clutter band and are difficult to detect Perturbations of the flight path due to the flight dynamics of the aircraft and wind effects may cause further degradation of the MTI performance It has been shown in earlier papers of the author that space-time FIR filters applied to the output signals of a linear array antenna can be used to compensate adaptively for the flight path component of the platform motion so that a large improvement in signal-to-clutter-plus-noise ratio (SCNR) can be obtained Such filters are referred to as TASTE (techniques for airborne slow target extraction) methods In the paper these ideas are extended to the compensation of transversal velocity components by means of a planar array with horizontal orientation The influence of the system bandwidth is also investigated The results obtained can be generalised to compensate for three-dimensional perturbations of the flight path without using an inertial navigation device

Detection of Moving Targets by Refocusing for Airborne CSSAR

Abstract: Due to the advantage of short revisit time, airborne circular stripmap synthetic aperture radar (CSSAR) is an attractive tool for air-to-ground surveillance and reconnaissance. This paper deals with the issue of ground moving-target detection with an airborne CSSAR and proposes a new autofocus-based detection algorithm. The prominent features of the proposed algorithm are the incorporation of the Doppler ambiguity information into the autofocus-based moving-target detection and the ability to solve the problem of large range cell migration, which affects most of autofocus algorithms. The proposed algorithm can detect not only the targets whose azimuth chirp rates are different from that of the static clutter background but also the targets whose Doppler ambiguities are different from that of the static clutter background. Numerical results show that the proposed algorithm works well in both homogeneous and heterogeneous clutter backgrounds.

Target parameter estimation in moving transmitter moving receiver forward scatter radar

Abstract: This paper focuses on the estimation of target's motion parameters in a moving transmitter/moving receiver forward scatter radar scenario. An extension of the quasicoherent processing initially developed for stationary FSR mode of operation is introduced. This offers an estimation of the target's trajectory in a general case where transmitter and receiver can be moving. Simulated and real data are used to analyse the performance of the presented processing.

Circular Micro-SAR for mini-UAV

Abstract: This paper presents a new multifunction radar that was specially designed for mini-UAV platforms. The multi-channel radar is omnidirectional, allowing great flexibility in radar- and flight operations. A demonstrator has been built, weighing 800 grams, and consuming 25 W. Flexible SAR, GMTI and novel sensing modes can be demonstrated with this system.