Patent ID: 7342978

Claim:
A method for peak-to-average power ratio (PAPR) reduction for an orthogonal frequency division multiplexing (OFDM) signal, comprising the steps of: (a) partitioning a discrete-time sequence x[n] of length N into M disjoint subblocks directly in time domain, each subblock having a length of N/M, M being a power of 2, and N/M being an integer greater than 1; (b) using a combiner to combine said M disjoint subblocks into M different sequences y k [n], each having a length of N/M, where k=1, 2, . . . , M and n=0, 1, . . . , (N/M)−1; and (c) phase rotating said M sequences y k [n] and adding them together to obtain a complete N-point transmitted signal {tilde over (x)}[n], where N is the length of said OFDM signal, and n=0, 1, . . . , N−1.