Digital automatic gain control method and device for use in communication terminal of mobile radio communication system
US6205189A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/52
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital automatic gain control device for use in a communication terminal of a mobile radio communication system employing a time-division duplex (TDD) transmission. A transmission power amplifier and a reception amplifier, which constitute the communication terminal, are fully composed of digital elements. In a transmission mode, a reception data latch is cleared to turn off the reception amplifier, so as to prevent a distortion of a modulated transmission signal due to regeneration and coupling of a modulated transmission waveform generated from a receiver. On the contrary, in a reception mode, a transmission data latch is cleared to prevent the carrier generated from the transmitter from being leaked toward a receiver, thereby preventing deterioration of a reception sensitivity of the receiver. Therefore, the transmission and reception gain can be accurately controlled based on the accurate timing control by the control processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.