Patent ID: 8218521

Claim:
A signal generation device that generates a transmission signal in a wireless transmission system, characterized by comprising: data attenuation coefficient generation means that is supplied with M data signals (M is a natural number), for estimating and selecting data signals that may cause a peak after oversampling, determining an attenuation amount for the selected one or more data signals, generating information concerning a selection result and the determined attenuation amount for the selection result, and outputting the information as a data attenuation coefficient; an attenuation coefficient multiplication unit that is supplied with the M data signals and the data attenuation coefficient, multiplies each of the data signals corresponding to the selection result for the data attenuation coefficient by the attenuation amount for the selection result, and outputs multiplication results as M attenuation coefficient multiplication signals; and an oversampling unit that is supplied with the M attenuation coefficient multiplication signals and performs oversampling, thereby generating and outputting a transmission signal, wherein the data attenuation coefficient generation means includes a slope estimation unit that outputs, as slope estimation values corresponding respectively to the M data signals, information indicating inclinations of data signal waveforms at data signal points, from the M data signals, respectively, and a slope reference attenuation signal selection unit that is supplied with the M data signals and the M slope estimation values, estimates and selects data signals that may cause a peak after oversampling, based on amplitude values of the M data signals and the M slope estimation values, determines an attenuation amount for the selected data signals, generates information concerning a selection result and the determined attenuation amount, and outputs the information as the data attenuation coefficient.