Patent Number: 6,167,244

Title: Gain control method and receiver

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.

Inventors: Tomoe; Naohito (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: H03G 3/20 (20060101); H03G 3/30 (20060101); H04L 7/04 (20060101); H04L 7/08 (20060101); H04B 001/06 ()

Expiration Date: 12/26/2017