Multi-pass interference reduction in a GSM communication system
US6944245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2003 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Oct 17, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03477
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An iterative method (400) and apparatus (200) for a receiver for reducing interference in a desired signal in a GSM communication system that use a finite-impulse-response filter combined with alternate quadrature component output selection for alternate linear equalization. The method includes inputting a burst of data of a received waveform including interference, training an alternate linear output filter with a midamble of known quadrature phase, providing an estimate of the desired signal by operating on the received waveform with the finite-impulse-response filter, generating log likelihood ratio estimates for a plurality of bits in the burst of data, selecting bits from the burst of data base upon a predetermined condition, and re-training the alternate linear output filter to provide a second improved estimate of the desired signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.