System and method for reducing interference generated by a CDMA communications device
US6205190A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1996 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Apr 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B15/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter would otherwise be operative. In a first embodiment, a variable rate vocoder within the transmitter is directed to perform full-rate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor builds full-rate frames using repeated versions of code symbols generated by the vocoder. In a third embodiment, the microprocessor builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.