Octagonal quadrature amplitude modulation

摘要

Octagonal non-rectangular Quadrature Amplitude Modulation (QAM) is disclosed. Grid points from a uniform rectangular grid, which includes points that have equal horizontal and vertical spacing, are selected to form a non-rectangular octagonal grid that approximates an octagonal shape. QAM symbols are mapped to respective grid points in the non-rectangular octagonal grid to form a non-rectangular octagonal QAM constellation that also approximates the octagonal shape. Input signals can then be modulated using the non-rectangular octagonal QAM constellation.

主权项

1. A method comprising:
selecting, by a grid point selector, from a uniform rectangular grid comprising points that have equal horizontal and vertical spacing, a subset of the points to form a non-rectangular octagonal grid, the non-rectangular octagonal grid approximating an octagonal shape; and mapping, by a grid point mapper, Quadrature Amplitude Modulation (QAM) symbols to respective grid points in the non-rectangular octagonal grid to form a non-rectangular octagonal QAM constellation that approximates the octagonal shape.