Abstract This work presents the implementation of a synthetic aperture radar (SAR) at 77 GHz, for automotive applications. is unique in sense that it radar-only solution most use-cases. The set-up consists two sensors, one to calculate ego trajectory and second SAR measurements. Thus need expensive GNSS-based dead reckoning systems, which are any case not accurate enough fulfill requirements SA...

This paper will discuss a new multifrequency dual channel coherent radar depth sounder for sounding ice. This sounder is unique, since it is a fully coherent chirp radar designed to operate at low (1,500ft) as well as high altitudes (30,000ft). The dynamic range of the radar is sufficient for simultaneously imaging both the top and bottom returns from ice without the need for data blanking or S...

This paper presents the principle of synthetic aperture frequency modulated continuous wave (FM-CW) radar and demonstrates the detection results of several objects buried in natural snowpack using the radar system. First, the synthetic aperture technique is explained with emphasis placed on showing that the Fourier transformed beat signal obtained by the FM-CW radar is equivalent to one kind of...

The synthetic aperture radar principle has been discovered in the early 50. Since then, a rapid development took place all over the world and a couple of airand space-borne systems are operational today. Progress made in technology and digital signal processing lead to very flexible systems useful for military and civilian applications. Radar has proved to be valuable before, because of its day...

Autonomous UGVs (unmanned ground vehicles) has been extensively investigated it’s capabilities for military applications. In order to operate the UGVs on the open fields, they must be able to detect obstacles (eg. holes, stumps, rocks, etc) concealed behind vegetation canopies, as well as to detect surface. Forward looking imaging radar is necessary to autonomous UGVs for collision avoidance an...

We present local least squares and regularization frameworks for computing 3D velocity (3D optical flow) from 3D radial velocity measured by a Doppler radar. We demonstrate the performance of our algorithms quantitatively on synthetic radial velocity data and qualitatively on real radial velocity data, obtained from the Doppler radar at Kurnell Radar station, Botany Bay, New South Wales, Austra...

This paper presents both numeric simulations and radar measurements related to through the wall imaging technologies. We present synthetic aperture radar (SAR) images obtained by the Army Research Laboratory (ARL) Forward-Looking Radar system during field experiments and compare those with the results of our Xpatch computer models. We also demonstrate a computational approach based on the Finit...

Ultra-wide band (UWB) pulse radar has high range resolution, and is thus applicable to imaging sensors for a household robot. To enhance the imaging region of UWB radar, especially for multiple objects with complex shapes, an imaging algorithm based on aperture synthesis for multiple scattered waves has been proposed. However, this algorithm has difficulty realizing in real-time processing beca...

in this paper, the range doppler algorithm (rda) for synthetic aperture radar moving on a ballistic trajectory is presented. the 3-dimension acceleration and non-uniform trajectory cause decreases in efficiency of conventional imaging algorithms. in this paper, the analytical expression for the 2-d signal spectrum for ballistic trajectory using taylor series expansion and series reversion is de...

Signatures of oceanic internal waves are frequently visible on Synthetic Aperture Radar images. The observed radar backscatter modulations are due to induced surface current variations, but the degree of modulation depend on several factors, such as the phase speed of the internal waves, the ambient wind and viewing geometry. Dimensional analysis is here used to derive simplified expressions re...