Blind adaptive filtering of unknown signals in unknown noise in quasi-closed loop system
US5768392A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Apr 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03522
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for blind adaptive filtering an input signal having noise and information signal parameters that are separated by an identifier. An open loop filter stage generates an intermediate filtered signal from the noise parameters and the input signal parameters. A cost function generator generates a first cost function signal and an inverse first cost function signal from the open loop filter parameters. A residual signal is generated from the difference between the input signal and the intermediate filtered signal. Another cost function generator, coupled to the input signal and the residual signal generator, generates a second cost function signal and an inverse second cost function that maximize a stationarity feature of the residual signal. A combiner generates a combined cost function from the inverse first and second cost functions. A quasi-closed loop filter generates the filtered output signal from the intermediate filtered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.