Patent ID: 8311148
Filing Date: 2012-11-13
Classification: H03F,H04B,H04L

Abstract:
1. A transmission signal generating apparatus for generating transmission signals with reduced peak power, the apparatus comprising: a data multiplexing subcarrier identification signal generator that generates a data multiplexing subcarrier identification signal that identifies subcarriers with which data signals are to be multiplexed; a transmission signal generator that generates transmission signals by multiplexing data signals with subcarriers according to the data multiplexing subcarrier identification signal generated by said data multiplexing subcarrier identification signal generator; and a peak reducing transmission signal generator that generates peak reducing transmission signals by reducing peak power of said transmission signals generated by said transmission signal generator according to peak reducing signals in a combination of a first peak reducing process in which subcarriers, with which the data signals are not multiplexed, are used for the peak reducing signals and subcarriers, with which the data signals are multiplexed, are not used for the peak reducing signals based on said data multiplexing subcarrier identification signal, and a second peak reducing process in which both subcarriers, with which the data signals are not multiplexed and the subcarriers with which the data signals are multiplexed, are used for the peak reducing signals; wherein said peak reducing transmission signal generator: carries out said second peak reducing process after having carried out said first peak reducing process; recursively repeats said first peak reducing process to generate the peak reducing signals based on said transmission signals and adds the peak reducing signals to said transmission signals by a predetermined number of times; and thereafter, recursively repeats said second peak reducing process to generate the peak reducing signals based on said transmission signals and adds the peak reducing signals to said transmission signals by a predetermined number of times.