| 摘要 |
In accordance with the present invention, there are provided peak-to-average power ratio optimal phase shifters for multi-carrier communications. An optimal shifter is shown to be a complex, constant envelope sequence mapped by a multi-tone transformation used to another complex, constant envelope sequence. In the case of the inverse discrete Fourier transform being the multi-tone transformation, a family of principal shifters of the form z(r)=exp(±j*pi*p*r<SUP>2</SUP>/q), where j<SUP>2</SUP>=-1, 0<=r<q, q is a number of subcarriers, and p and q are mutually prime integers of different parity, has been analytically constructed. These phase shifters outperform the best existing phase shifter by as much as 2.6 dB.
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