Stepped frequency radar target imaging
Abstract
An apparatus is disclosed by which radar targets can be imaged in two dimensions for identification at full radar range using relatively moderate speed data processing. Images of targets are found in range and cross-range dimensions from the time history of the targets' wide-band spectral response obtained by a frequency stepping radar. A frequency synthesizer generates a series of N identical signal bursts, each burst comprising n pulses and each of said n pulses being a different frequency. The radar echos from this series of bursts is separated into n-phase and quadrature phase components. These components are processed to calculate and store the relative amplitude of each echo signal relative to the phase of the corresponding transmitted pulse.
- Publication:
-
Patent Department of the Navy
- Pub Date:
- May 1984
- Bibcode:
- 1984navy.reptR....W
- Keywords:
-
- Frequency Synthesizers;
- Imaging Techniques;
- Radar Imagery;
- Radar Targets;
- Amplitudes;
- Broadband;
- Data Processing;
- Distance;
- Doppler Radar;
- Frequencies;
- Image Rotation;
- Orthogonality;
- Patents;
- Pulses;
- Radar Echoes;
- Rangefinding;
- Scalers;
- Spectra;
- Communications and Radar