A lower bound on the data rate for synthetic aperture radar
Abstract
The source coding theory of information theory is applied to the digital processing of synthetic aperture radar signals. A lower bound is established on the data rate that must exist at any point in the processing flow, in particular at the conversion from analog-to-digital (A/D) signals, to achieve a given output map signal-to-noise ratio. The usual linear uniform-step A/D conversion of in-phase and quadrature coherent video signals is found to provide a given output map signal-to-noise ratio with a data rate within about 20 percent of the derived lower bound.
- Publication:
-
NASA STI/Recon Technical Report A
- Pub Date:
- November 1976
- Bibcode:
- 1976STIA...7717089Z
- Keywords:
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- Coherent Radar;
- Digital Radar Systems;
- Radar Data;
- Side-Looking Radar;
- Signal Processing;
- Synthetic Arrays;
- Analog To Digital Converters;
- Data Storage;
- Information Theory;
- Limits (Mathematics);
- Photomapping;
- Pulse Doppler Radar;
- Radar Maps;
- Signal Encoding;
- Signal To Noise Ratios;
- Video Data;
- Communications and Radar