METHOD AND DEVICE FOR TRANSMITTING DATA AT HIGH DATA RATE IN PLURALITY OF LOW DATA RATE CHANNELS

PROBLEM TO BE SOLVED: To provide a method and a device for providing a reduced peak-to-average amplitude ratio using a set of low rate channels. SOLUTION: A set of a plurality of low rate channels are subjected to phase rotation before summed and transmitted. The degree of the phase rotation depends on the number of the channels applied to formation of a higher rate channel. In the case where two low rate channels (a channel A, a channel B) are used, the in-phase components and quadrature-phase components of the two channels are multiplied before upconversion using in-phase and quadrature-phase sinusoids, COS(ωct), SIN(ωct). For a high rate channel composed of a plurality of low rate channels, the in-phase and quadrature-phase component of each channel is upconverted with a set of sinusoids, COS(ωct+i/N.180°), SIN(ωct+i/N.180°) that have phases offset from one another. COPYRIGHT: (C)2009,JPO&INPIT