The sinc interpolation in the impulse response function analysisFunded under: JRC-REMSENS 4C
The [sin(x)/x](sinc) interpolation is commonly used in resampling SAR data centred around a point target to obtain the interpolated impulse response function to be analysed. Detected SAR data are output from a correlation processor in either amplitude or intensity format. In the former case the data can be squared before or after the interpolation, leading to a substantial difference in profile in the two procedures. After interpolation, squaring presents a better estimate of the side lobe peak values but an overestimate of the 3 dB width. Before interpolation squaring elevates side lobe contributions. In this paper the differences are explained by applying the sampling theorem, and the two methodologies compared against theoretical uninterpolated data.
Bibliographic Reference: Paper presented: Geoscience and Remote Sensing Symposium (INGARSS'92), Houston, Texas (US), May 26-29, 1992
Availability: Available from (1) as Paper EN 36736 ORA
Record Number: 199210967 / Last updated on: 1994-12-02
Original language: en
Available languages: en