APPARATUS AND METHOD FOR CONTROLLING TRANSMISSION POWER IN AMOBILE COMMUNICATION SYSTEM

摘要

An apparatus and method for maximizing the efficiency of a power amplifier b y reducing the PAPR of a BS in a mobile communication system. A power controll er between I and Q channel pulse shaping filters and a frequency converter calculates cancellation signals for signal pulses that increase the PAPR at each sampling period, pulse-shape-filters cancellation signals at the highes t levels among the cancellation signals, and adds the filtered cancellation signals to the original signals. Thus, spectral regrowth outside a signal frequency band is suppressed. In the case of a system supporting multiple frequency allocations, the PAPR is controlled for each FA according to its service class. Therefore, minimum system performance is ensured and power us e efficiency is increased.