Initialization of adaptive blocking matrix filters in a beamforming array using a priori information
US11025324B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2020 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Apr 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/3912
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adaptive beam-forming array uses multiple sensors and noise reference subtraction to reduce noise at an output of the adaptive beam-forming array. A direction of arrival of energy from a desired source is determined and an inter-sensor noise correlation between one or more pairs of sensors is determined. An Adaptive Blocking Matrix (ABM) generates a noise reference from an inter-sensor model representing a relationship between desired signal components received from the desired source and that are present in signals from one or more pairs of sensors. The noise reference is generated with an adaptive filter that filters a first signal from a first sensor in the pairs of sensors and is combined with the second signal from a second sensor in the pairs of sensors to produce the noise reference. The adaptive filter is initialized with an initialization response computed from the direction of arrival and the inter-sensor noise correlation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.