Efficient methods for wideband circular and linear array processing
US7586437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2007 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | May 15, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The objective of this patent is to develop new signal processing algorithms for a wide-band circular electronically scanned array (CESA) or a wideband linear electronically scanned array (LESA) for use in surveillance and communications applications, where a sequence of pulses are transmitted and their returns are collected by the array for further processing. Instead of partitioning the entire wideband frequency into various subbands and then processing them separately using narrowband schemes, a frequency focusing method is proposed here to compensate and focus the wideband spatio-temporal data into a single narrow frequency band. This is made possible by operating with a pre-computed frequency focusing matrix that transforms the data from various frequency slots that are spread across the entire wideband region into a common narrowband frequency for the array outputs. Finally the focused narrowband data can be processed using conventional space-time adaptive processing methods to suppress the clutter/noise returns and detect any targets present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.