Patent ID: 7873118

Claim:
A method of transmitting signals from a transmitter for controlling peak to average power ratio (PAPR) used in a mobile communication system, the method comprising: outputting ‘N b ’ parallel data symbols from a serial to parallel converter using serial data; outputting ‘G*N b ’ oversampled data symbols by oversampling each of the ‘N b ’ parallel data symbols in an oversampling unit ‘G’ times; spreading the ‘G*N b ’ oversampled data symbols in a frequency domain in a discrete Fourier transform (DFT) unit using a DFT matrix to generate a spread signal; mapping the spread signal to subcarriers in a subcarrier mapping unit; and transmitting the subcarrier-mapped signal to a receiver in a transmitting unit, wherein when ‘G’ is 2: the oversampling is performed using a first equation defined as: s xo =s xo 1 +s xo 2 , wherein s xo is an oversampled vector, wherein s xo 1 is determined by using a second equation defined as: s xo 1 =[s x (0) 0 s x (1) 0 . . . s x ( N b −1) 0] T and wherein s xo 2 is a data vector generated by shifting a component of the s xo 1 .