WIT Press


Synthetic Aperture Radar Raw Signal Simulator For Both Pulsed And FM-CW Modes

Price

Free (open access)

Paper DOI

10.2495/CMEM110371

Volume

51

Pages

11

Page Range

423 - 433

Published

2011

Size

780 kb

Author(s)

P. Serafin, C. Lesnik & A. Kawalec

Abstract

Simulated raw radar signals prove to be very useful at the first stages of testing radar signal processing algorithms and procedures. This is particularly true for synthetic aperture radar (SAR), where the costs of real signals acquisition are very high due to the costs of building the system as well as the costs of mission (air or space-borne). This paper describes a multifunctional SAR raw signal simulator that has been used for the verification of SAR image synthesis algorithms. Generated signals can be imitated for pulsed as well as FM-CW radars both in SLAR and squinted cases, it is also possible to choose between video and intermediate frequency signals. The simulator allows us to generate echo signals from stationary and moving targets. The user is able to differentiate the statistic properties of received echo signals for each target, thus allowing us to generate different types of reflecting surfaces. If present, a real raw SAR signal can be merged with a simulated one to produce more complicated scenarios. The paper presents results of the simulation of raw signals and their image after SAR processing. Keywords: synthetic aperture radar, SAR signal simulator, FM-CW SAR. 1 Introduction Airborne and space borne radar imaging allows us to collect the pictures of a terrain fragment independently of the time of the day, the weather or visibility conditions over the imaged scene. Unfortunately, due to relatively long waves used by the radar (compared to photography), it needs to employ large antennae in order to achieve the desired image resolution. This can make the system impossible to build onboard an airplane or a satellite. The solution to this problem is the technique of the synthetic aperture radar (SAR) that is able to

Keywords

synthetic aperture radar, SAR signal simulator, FM-CW SAR