Patent ID: 8073075

Claim:
A transmission apparatus with a mode of operating a power amplifier in a compressed mode and a mode of operating the power amplifier in an uncompressed mode, the apparatus comprising: a filter that performs waveform shaping of an output of the power amplifier; an analogue to digital converting section that obtains output power data for each mode by sampling a filtered signal in compressed mode and sampling a filtered signal in uncompressed mode at a same phase as the filtered signal in compressed mode; and a transmission power controlling section that controls output power of the power amplifier upon a mode change, based on the output power data for each mode obtained in the analogue to digital converting section, wherein: the transmission apparatus transmits a spread modulated signal spread by a spreading code; and the analogue to digital converting section starts sampling the filtered signal in compressed mode and the filtered signal in uncompressed mode from the same phase at a sampling frequency equal to a fundamental frequency of the spread modulated signal resulting from a pattern of the spreading code.