Method and apparatus for improving transmission of data in a wireless network
US6038430A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided that improve data transmissions in a wireless network, optimized for the transmissions of voice signals, by companding data signals electrically about a spectral shaping module in data handling devices, preferably modems, at both the transmitting and receiving ends of the wireless network. At the transmitting end, the companding is performed by a compressor, electrically preceding a data de-emphasis module, and an expander, electrically succeeding the data de-emphasis module. At the receiving end, the companding is performed by a compressor, electrically preceding a data pre-emphasis module, and an expander, electrically succeeding the data pre-emphasis module. At both ends of the wireless network, companding better serves to facilitate the transmission of data across the wireless network because complimentary functions are performed symmetrically at both ends and because data streams are more complimentarily coupled to, and from, wireless transceivers that similarly perform companding electrically about voice and data streams between the transmitting and receiving ends. Such wireless transceivers being spectrally optimized for voice signal trans…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.