Gain control method and receiver
US6167244A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an AGC system, a high-speed convergence of an AGC is provided at a burst signal head for an aperiodic burst signal inherent in a base station, having irregular transmitting power from a mobile station, and transmitting power is controlled and a receive of an interference wave is detected for a periodic burst signal according to the presence or absence of voice at the mobile station, thereby preventing an erroneous control of the AGC and maintaining communication quality in a radio base station system. In case of the aperiodic burst signal, a receive level is detected at high speed by, in an attenuator and an AGC amplifier serving as a gain control device, setting the AGC amplifier with a slower transient response to a fixed gain, and turning ON/OFF only the attenuator with a rapid transient response. In case of the periodic burst signal, a synchronous word contained in the burst signal is used to prevent the erroneous control and detect interference in the AGC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.