An extension to range-Doppler SAR processing to accommodate severe range curvature

Horrell, J.M.

doi:10.1109/igarss.1999.773557

Cited by 5 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Horrell [3] presented an extended RDA which performs RCMC and SRC in the 2-D frequency domain. We take the algorithm just as an example to deal with the Legendre-based imaging method.…”

Section: Principle Of the Extended Rda [3]mentioning

confidence: 99%

“…This is the key idea behind the presented algorithm. Note that the algorithm will be described with the extended RDA [3], i.e., an extension to the standard RDA, as example, which performs range cell migration correction (RCMC) and secondary range compression (SRC) in the 2-D frequency domain. Our method differs from the extended RDA only in three phase factors.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Approach to Range Doppler SAR Processing Based on Legendre Orthogonal Polynomials

Deng

Qin

et al. 2009

IEEE Geosci. Remote Sensing Lett.

View full text Add to dashboard Cite

The range Doppler algorithm (RDA) is based on Taylor series expansion for the transfer function (TF) phase component, resulting in increasing phase error as the range frequency or the squint angle increases. We introduce Legendre orthogonal polynomials into synthetic aperture radar data processing steps to replace Taylor series expansion used in approximating the TF phase. A novel range Doppler imaging approach based on Legendre expansion is addressed with an extended RDA as example, and the analytical expressions of the new phase multiplication factors are then derived. The simulation results show that the proposed method provides better focusing performance than the conventional RDA in the same squint case and is more suitable for the large squint mode while there is negligible increment of computation load.Index Terms-Legendre orthogonal polynomials, range Doppler algorithm (RDA), synthetic aperture radar (SAR).

show abstract

“…Horrell [3] presented an extended RDA which performs RCMC and SRC in the 2-D frequency domain. We take the algorithm just as an example to deal with the Legendre-based imaging method.…”

Section: Principle Of the Extended Rda [3]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Range Doppler SAR Processing Based on Legendre Orthogonal Polynomials

Deng

Qin

et al. 2009

IEEE Geosci. Remote Sensing Lett.

View full text Add to dashboard Cite

show abstract

“…There have been lots of algorithms proposed for SAR data focusing or imaging, such as range-Doppler algorithm (RD) [2] [3], wave number domain algorithm (m-k) [4] [5], chirp-scaling algorithm (CS) [6], extended exact transform function algorithm (EETF) [7] [8] and the algorithms stemming from them (e.g. Extended CS [9], Non-liner CS [10]).…”

Section: Introductionmentioning

confidence: 99%

Adaptive SAR data processing with automatic range cell migration correction in Doppler domain

Wang

Liu

2008

2008 IEEE Radar Conference

View full text Add to dashboard Cite

This paper extends the concept of autofocus in SAR processing procedure and proposes an adaptive algorithm for SAR data focusing. The novel algorithm discards the hypothesis in the autofocus algorithms, i.e. the range migration has been removed perfectly, and moves the "adaptive" processing to the front of RCMC. By adjusting the parameters for focusing adaptively, the range migration in the Doppler domain can be removed correctly. With such an adaptive algorithm, a better image quality can be achieved with respect to the classic autofocus algorithms.

show abstract

“…There are a number of algorithms developed for strip SAR imaging, such as Range-Doppler (R-D) algorithm [2] [3], Chirp-Scaling (CS) algorithm [4], Extended Chirp-Scaling (ECS) algorithm [5] [6], Nonlinear Chirp-Scaling (NCS) algorithm [7] [8] and Extended Exact Transfer Function (EETF) algorithm [9] [10], etc. In those algorithms, a focusing filter is constructed at a reference range and only the SAR data at the range can be focused perfectly.…”

Section: Introductionmentioning

confidence: 99%

A Quartic Algorithm For Squint Sar Imaging

Wang

Liu

2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings

View full text Add to dashboard Cite

In this paper some improvements of Non-linear Chirp Scaling (NCS) approach are proposed and a modified algorithm based on the NCS is described. The improvements include three main aspects. A quartic polynomial model is adopted to represent SAR signal in Range-Doppler domain and 2-D frequency domain to improve precision. A constant scaling factor is employed to replace the reference frequency in the NCS, which makes NCS more flexible. A second chirp scaling operation is added to the end of the NCS so as to remove scaling effect on range direction of SAR image. Those improvements make NCS applicable to process highly squinted SAR data from a large range swath at a fine resolution.

show abstract

An extension to range-Doppler SAR processing to accommodate severe range curvature

Cited by 5 publications

References 6 publications

A Novel Approach to Range Doppler SAR Processing Based on Legendre Orthogonal Polynomials

A Novel Approach to Range Doppler SAR Processing Based on Legendre Orthogonal Polynomials

Adaptive SAR data processing with automatic range cell migration correction in Doppler domain

A Quartic Algorithm For Squint Sar Imaging

Contact Info

Product

Resources

About