Method for estimating nondirectional wave spectrum from sea echoes of multiple high radar frequencies
US12025730B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2022 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Jan 18, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure provides a method for estimating the nondirectional wave spectrum from the sea echoes of multiple HF radar frequencies. The method includes: dividing the radar detection area into a plurality of fan-shaped units at an equal range interval and angle interval according to the distance resolution and the angular resolution of an HF radar; obtaining the Doppler spectrum from the sea echo of a single radar frequency at a fan-shaped unit by performing the first fast Fourier transform (FFT) in distance dimension, the second FFT in Doppler frequency dimension and the digital beamforming; extracting the positive first-order peak and the negative first-order peak from the aforementioned Doppler spectrum by the peak-searching method; and selecting the stronger first-order peak σR(1)(ω); dividing the second-order spectrum on the stronger first-order peak side into an inner second-order spectrum and an outer second-order spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.