Ground SAR system with tunable distance limits and low sampling rate

Gonzalez-Partida, J.-T.; Almorox-González, P.; Burgos-García, M.; Dorta-Naranjo, B. Pablo

doi:10.1049/cp:20070595

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our sensor, a fixed central frequency IF filter and a variable PRF were used to tune the different range limits. The technique is explained in detail in [3, 4] but a short summary is given here.…”

Section: System Descriptionmentioning

confidence: 99%

“…Furthermore, a large bandwidth can be more easily transmitted working in the millimeter-wave band, because the relative bandwidth is lower. The SAR system described in this paper transmits to 2 GHz of bandwidth, which corresponds to range resolution of 7.5 cm [4]. This high resolution is a problem from the point of view of motion errors, because the motion errors could be larger than the resolution cell in UAV operation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

SAR System for UAV Operation with Motion Error Compensation beyond the Resolution Cell

González-Partida

Almorox-González

Burgos-García

et al. 2008

Sensors

View full text Add to dashboard Cite

This paper presents an experimental Synthetic Aperture Radar (SAR) system that is under development in the Universidad Politécnica de Madrid. The system uses Linear Frequency Modulated Continuous Wave (LFM-CW) radar with a two antenna configuration for transmission and reception. The radar operates in the millimeter-wave band with a maximum transmitted bandwidth of 2 GHz. The proposed system is being developed for Unmanned Aerial Vehicle (UAV) operation. Motion errors in UAV operation can be critical. Therefore, this paper proposes a method for focusing SAR images with movement errors larger than the resolution cell. Typically, this problem is solved using two processing steps: first, coarse motion compensation based on the information provided by an Inertial Measuring Unit (IMU); and second, fine motion compensation for the residual errors within the resolution cell based on the received raw data. The proposed technique tries to focus the image without using data of an IMU. The method is based on a combination of the well known Phase Gradient Autofocus (PGA) for SAR imagery and typical algorithms for translational motion compensation on Inverse SAR (ISAR). This paper shows the first real experiments for obtaining high resolution SAR images using a car as a mobile platform for our radar.

show abstract

Section: System Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%