Patent ID: 9191257
Filing Date: 2015-11-17
Classification: H04L

Abstract:
1. A method for determining signal phase rotation of sub-channels within a non-contiguous transmission bandwidth, the method comprising the steps of: determining a fundamental set of phase rotations; performing a cyclic shift operation for all of the fundamental set of phase rotations to generate a cyclic-shifted set of phase rotations; multiplying the cyclic-shifted set of phase rotations by a complex constant to generate a final set of phase rotations; and determining the phase rotation of each sub-channel within the non-contiguous transmission bandwidth within a communication system according to the final set of phase rotations, wherein the sub-channels comprise four sub-channels within the non-contiguous transmission bandwidth, and three of the four sub-channels have the same phase rotation, and the remaining sub-channel has a phase rotation with a 180-degree difference from that of the other three sub-channels.