DEVICE, METHOD AND SYSTEM FOR REDUCING POWER OF ADJACENT CHANNEL IN RADIO COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To provide a method and a device for reducing the power in an adjacent channel in a radio communication system. SOLUTION: A signal to apply correcting is inputted to an amplifier 16 after being predistorted by a digital predistortion generator 12 for digital application, and corrected equivalently and inversely to an estimate distortion generated by that amplifier 16. The correction and amplified distortion are mutually canceled. As a result, linear converting characteristics are provided for a whole system 10. On such conditions, the power in the adjacent channel is reduced.