A new eigenvector beam-forming method without first eigenvector for reducing interference inside relay station

In recent wireless communications, communication with wider service area and high data rate is required by the spread of mobile phones and wireless LAN systems. Moreover, wireless communication becomes a very important tool: hence, it must be reliable when disasters, and on on occur. From the viewpoint of decreasing the transmission power and expanding the service area, relay stations are investigated regardless of mobile and fixed wireless communications. Moreover, MIMO transmission using the relay station, Relay MIMO transmission is proposed from the viewpoint of a high frequency utilization and reliable communication [1].