Patent ID: 7990844

Claim:
An apparatus for generating a vector of digital signal samples (S), the apparatus comprising: hardware means for receiving a discrete signal of complex data symbols (C), calculating frequency responses (A 1 , . . . A M ) corresponding to tones (f (1) , . . . f (M) ), through an M-point discrete Fourier transform (DFT), and outputting a vector of length M; means for expanding the output vector to a new vector of length N, and means for inserting zero-value symbols corresponding to tones other than tones allocated to a transmitter; and means for performing an N-point inverse discrete Fourier transform (IDFT) operation on the new vector after zero insertion to obtain the vector of digital signal samples (S), and generating a low peak-to-average OFDM-based signal using the vector of digital signal samples (S) for transmission.