Receiver employing correlation technique for canceling cross-talk between in-phase and quadrature channels prior to decoding
US5157697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Mar 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2332
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver suitable for use in a radio-telephone system for recovering data from encoded, quadrature-modulated communication signals employs a feedback arrangement for suppressing cross-talk between the receiver's in-phase and quadrature channels to improve data recovery rates during decoding. The receiver converts in-coming analog communication signals into in-phase and quadrature digital signals, which may have cross-talk components. The receiver has an attenuator for subtracting feedback signals from the in-phase and quadrature digital signals to produce cross-talk-attenuated in-phase and quadrature digital signals, a decoder for decoding the cross-talk-attenuated in-phase and quadrature digital signals to generate first and second data output signals, and the above-mentioned feedback arrangement, which preferably employs a recoder and cross-correlation techniques, for generating the feedback signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.