Orthogonal frequency division multiplex systems
US6088398A · kind A · utility
28Cited by
6References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1997 |
| Grant date | Jul 11, 2000 |
| Priority date | — |
| Expiry date | Jun 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26035
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus increase a maximum available bit rate on a single data link, in order to gain capacity within single cells. An orthogonal frequency division multiplex signal is filtered by a pulse shaping operation so as to suppress side lobes of the signal. This pulse shaping introduces known inter symbol interference (ISI) and loses orthogonality between subcarriers. However, a receiver utilizes the idea of overcoming ISI by applying equalization to the signal such that the loss of orthogonality is overcome.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.