COMMUNICATION TERMINAL, BASE STATION SYSTEM, AND METHOD OF CONTROLLING TRANSMISSION POWER

摘要

An antenna (201) receives quadrature signals transmitted from different antennas of a base station. De-spreading sections (202, 203) de-spread received signals using the same spreading codes as those used at the base station. Demodulators (204, 205) demodulate the de-spread signals. Power measurement sections (207, 208) measure the reception power from the demodulated signals, and a power measurement section (209) combines the reception power measurements. Power control section (212) controls the transmission power based on the combined reception power. This method provides high-speed open-loop transmission power control with high accuracy even in the case of slow fading.