Demapper for rotated QAM constellations

摘要

Techniques are described for quadrature amplitude modulation (QAM) processing in a rotated QAM constellation. In the techniques, one or more processors determine points within the rotated QAM constellation around a vector location of a received symbol based on a probability density function applied to the vector location. The one or more processors map the points to corresponding mapped symbols of the rotated QAM constellation, and determine a plurality of bits represented by the transmitted symbol based on the corresponding mapped symbols.

主权项

1. A method for quadrature amplitude modulation (QAM) processing in a rotated QAM constellation, the method comprising:
determining, by one or more processors, a vector location, within the rotated QAM constellation, of a received symbol that indicates a plurality of bits; determining, by the one or more processors, points within the rotated QAM constellation around the vector location based on a probability density function applied to the vector location; mapping, by the one or more processors, the points to corresponding mapped symbols of the rotated QAM constellation; and determining, by the one or more processors, the plurality of bits based on the corresponding mapped symbols.