Extended bandwidth transmitter for crosstalk channels
US5377230A · kind A · utility
24Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | May 1, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/32
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In many data communications systems, crosstalk is a significant channel impairment. If all transmitters in such a system must utilize the same shaping function, and if the transmitters are furthermore nominally Nyquist bandlimited, then the crosstalk generally cannot be mitigated by equalization. However, by extending the bandwidth of the transmitted signal in accordance with the principles of the invention, the resultant crosstalk can be efficiently mitigated by equalization. This extended bandwidth signal is produced by adding significant additional energy outside the traditional Nyquist band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.