Method and system for reduction of peak-to-average power ratio of transmission signals comprising overlapping waveforms

摘要

The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity.

主权项

1. A method, comprising:
calculating, by a processor, a first peak to average power value of a signal comprising a linear combination of a plurality of vectors; generating, by the processor, a phase vector comprising a sequence of random phase components, each random phase component corresponding to one of the plurality of vectors; calculating, by the processor, a second peak to average power value of a signal comprising a linear combination of the plurality of vectors each multiplied by its corresponding phase component of the phase vector; and if the second peak to average power value is less than the first peak to average power value, storing, by the processor, the phase vector in a memory, and setting the first peak to average power value equal to the second peak to average power value.