Combined echo and crosstalk cancellation
US8947992B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2013 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jul 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0697
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Combined echo and crosstalk cancellation is provided. Frequency domain adaptive filters are used to remove or reduce the effects of echo and crosstalk for a multi-channel and full-duplex communications system. Data from each transmit channel is buffered and converted to the frequency domain. The frequency domain data is multiplied by crosstalk coefficients to obtain a frequency domain correction signal for each channel. Adaptation of the crosstalk coefficients is based on correlations between the error signals and the data from each of the transmit channels. A single frequency domain transform engine, such as a Fast Fourier Transform engine, is employed for all calculations to save power and area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.