Method for transferring information using modems
US5394392A · kind A · utility
15Cited by
12References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1992 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Dec 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modem's data reception rate is increased by decreasing the amplitude of the signals transmitted by the modem. Decreasing the amplitude of the transmitted signals reduces the amplitude of the resulting echoes, and thereby reduces the residual echoes that remain after echo cancellation. Reducing the residual echoes permits increasing the data reception rate. Decreasing the amplitude of the transmitted signals also involves decreasing the data transmission rate; however, asymmetrical data transfer rates are acceptable for many modem applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.