Patent ID: 8199850
Filing Date: 2012-06-12
Classification: H04L

Abstract:
1. A transmitter configured to transmit a transmit signal modulated according to a first modulation scheme, comprising: an encoder configured to receive bits to be transmitted and encode the bits in accordance with the first modulation scheme, a symbol mapper configured: to map the encoded bits onto constellation points, wherein the first modulation scheme is associated with a set of first constellation points, wherein the transmitter is further configured to transmit at least a part of the transmit signal based on a subset of the first constellation points, wherein the first constellation points of the subset of the first constellation points approximate second constellation points of a set of second constellation points associated with a second modulation scheme, wherein the second modulation scheme is different from the first modulation scheme, wherein a second constellation point from the set of second constellation points is approximated by a first constellation point from the subset of first constellation points if a distance between the second constellation point and the first constellation point is less than or equal to the differences between the second constellation point and all other first constellation points of the set of first constellation points.