Abstract
AbstractThis work presents the implementation of a synthetic aperture radar (SAR) at 77 GHz, for automotive applications. This implementation is unique in the sense that it is a radar-only solution for most use-cases. The set-up consists of two radar sensors, one to calculate the ego trajectory and the second for SAR measurements. Thus the need for expensive GNSS-based dead reckoning systems, which are in any case not accurate enough to fulfill the requirements for SAR, is eliminated. The results presented here have been obtained from a SAR implementation which is able to deliver processed images in a matter of seconds from the point where the targets were measured. This has been accomplished using radar sensors which will be commercially available in the near future. Hence the results are easily reproducible since the deployed radars are not special research prototypes. The successful widespread use of SAR in the automotive industry will be a large step forward toward developing automated parking functions which will be far superior to today's systems based on ultrasound sensors and radar (short range) beam-forming algorithms. The same short-range radar can be used for SAR, and the ultrasound sensors can thus be completely omitted from the vehicle.
Highlights
The previous decade has witnessed significant advances made in the automotive sector
The results presented in this paper are the outcome of continued efforts to improve upon the status previously published by the authors [14]
The radar sensors mounted to the car are based on a development platform back-end with a front-end analogous to that of the sixth-generation short-range radar (SRR) [15]
Summary
The previous decade has witnessed significant advances made in the automotive sector. The timedomain backprojection algorithm was implemented on a GPU such that the backprojection algorithm [13] could be processed in parallel This considerably reduced the time needed to generate an image of the target scenery to a few seconds [9, 10, 12]. A necessary requirement for automotive SAR is a relatively high radar duty-cycle This implies that the cycle time (the amount of time before the data from a new block of chirp sequences is available) should be as short as possible. The radar sensors mounted to the car are based on a development platform back-end with a front-end (antennae) analogous to that of the sixth-generation short-range radar (SRR) [15] Since these are pre-series research specimens, the size of the sensor does not reflect the eventual size of the radar that will be commercially available. The other mentioned approaches could not deliver trajectory information with the accuracy required to generate SAR images
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call