Patent ID: 7639747

Claim:
A method for reducing the peak-to-average power ratio of a communication signal comprising the steps of: (a) sequencing a data signal according to a data vector to thereby create a sequenced data signal; (b) modulating a first plurality of carrier waves at a second plurality of frequencies with said sequenced data signal to thereby create a modulated signal; (c) measuring the peak-to-average power ratio of the modulated signal; (d) comparing said power ratio with a predetermined threshold; (e) if said power ratio exceeds said predetermined threshold, sequencing said data signal according to a data vector different from previous data vectors to thereby create a sequenced data signal different from previous sequenced data signals and repeating steps (b)-(e) until said power ratio does not exceed said predetermined threshold; (f) if said power ratio does not exceed said predetermined threshold, appending to the modulated signal a data map signal associated with the data vector for which said power ratio does not exceed said predetermined threshold to thereby create an appended signal; (g) sampling said appended signal; (h) reducing amplitude of said samples which exceed a predetermined range to thereby create a reduced amplitude signal; (i) filtering said reduced amplitude signal to thereby create said communication signal with a reduced peak-to-average power ratio.