Variable rate CDMA transmitter-receiver and transmission method
US6272123A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1998 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Apr 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70703
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A CDMA transmitter-receiver capable of varying a transmission rate of a voice signal coded on a sample by sample basis. A voice encoder encodes, on a sample by sample basis, a voice signal to be transmitted. An information distributor divides a coded digital signal, and supplies the divided parts to an error correcting encoder and an interleaver in accordance with transmission rate information so that the number of bits to be subjected to the error correcting coding varies in response to a transmission rate the transmission rate information indicates, thereby varying the total number of transmitted bits. Digital signals with and without subjected to the error correcting coding are transmitted to a party through components from the interleaver to an RF transmitting stage. A transmission power controller controls the transmission power of an RF transmitted signal output from the RF transmitting stage in response to the transmission rate information fed from the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.