Multi-carrier transceiver
US5497398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1993 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Aug 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26538
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-carrier data transmission system utilizing lapped transforms. Information to be transmitted is divided into a plurality of channels that are coded using a transform that places information into narrow bandwidth channels. The system makes use of the superior properties of filter banks constructed with narrow-band lapped transforms to provide improved signal isolation between the data channels. A new form of lapped transformation that provides both narrow-band filtering and phase information is described. The transform utilizes two components to provide information on phase changes induced by errors on the communication link. The improved transform provides a means for correcting for phase shifts that occur on the communication link. The system has superior burst noise immunity compared to systems based on FFT's.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.