Patent ID: 9054839
Filing Date: 2015-06-09
Classification: H04L

Abstract:
1. A modulation equipment, comprising: a symbol integrator, configured to combine at least one bit from a first bit stream with at least one bit from a second bit stream to form a symbol to be modulated; a symbol mapper, configured to map the symbol to be modulated to a constellation of a Quadrature Amplitude Modulation (QAM) map according to a set of predetermined mapping rules; wherein, in the set of predetermined mapping rules, multiple constellations corresponding to any particular bit value or particular set of bit values of the first bit stream are located in at least two quadrants in the constellation map and multiple constellations corresponding to any particular bit value or particular set of bit values of the second bit stream are located in at least two quadrants in the constellation map and wherein, in the set of predetermined mapping rules, constellation distribution patterns corresponding to the first bit stream and constellation distribution patterns corresponding to the second bit stream are symmetrical relative to line y=x or line y=−x, wherein, x and y represent the coordinate axis in the complex plane of the constellation map.