Time-domain adaptive beamforming of HF backscatter radar signals
Abstract
Experimental results on the use of adaptive beamforming techniques in HF backscatter systems are summarized. Small cross section repeaters were used in generating targets. SNR improvements after range/Doppler processing through the use of adaptive beamforming methods are discussed. Adaptive beamforming was restricted to the receive array, with off-line digital processing applied. One-hop backscatter signals were received in the presence of relatively high noise and interference, where adaptive beamforming works at its best. Adaptive beamforming algorithms (P-vector algorithm, constrained least-squares algorithm) are developed, and studies of time variation of coefficients, clutter suppression, and aperture tradeoff are discussed. The backscatter radar involved is useful in remote sensing of sea state and ocean wind conditions.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- September 1976
- DOI:
- 10.1109/TAP.1976.1141409
- Bibcode:
- 1976ITAP...24..707G
- Keywords:
-
- Adaptive Control;
- Backscattering;
- Collimation;
- Noise Reduction;
- Radar Beams;
- Radar Scattering;
- Time Response;
- Algorithms;
- Clutter;
- Doppler Radar;
- High Frequencies;
- Least Squares Method;
- Minicomputers;
- Remote Sensors;
- Signal Processing;
- Signal To Noise Ratios;
- Waveforms;
- Wind Effects;
- Communications and Radar