Patent ID: 7957693
Filing Date: 2011-06-07
Classification: H04B

Abstract:
1. A wireless relay amplification apparatus which relays radio waves between a base station and a mobile station, comprising: a base station antenna which receives radio waves from the base station; a mobile station antenna which transmits radio waves to the mobile station; a canceller which generates cancellation waves to cancel interference waves from the mobile station antenna, the interference waves being included in downlink signals received by the base station antenna; a downlink amplifier which amplifies downlink signals from which the interference waves have been canceled by the canceller; an uplink amplifier which amplifies uplink signals received by the mobile station antenna; a receiver which detects a level of received signals based on the downlink signals from which the cancellation waves have been canceled by the canceller, and outputs a propagation loss calculated based on a difference between the detected reception level and a transmission level of the base station included in notification information in the downlink signals; and a controller which controls gain of at least one of the downlink amplifier and the uplink amplifier based on the propagation loss output by the receiver.