Patent ID: 7961814
Filing Date: 2011-06-14
Classification: H04L

Abstract:
1. A method for generating modulation symbols according to a second symbol mapping scheme by a symbol mapping unit being adapted to generate symbols according to a first symbol mapping scheme, wherein the first and second symbol mapping schemes define different mappings of data words of a stream to modulation symbols of a modulation scheme according to the respective symbol mapping scheme, the method comprising: providing a stream of data words to a bit sequence transformer unit, wherein the number of bits of a data word is given by the order of the modulation scheme, transforming the data words by the bit sequence transformer unit to output a stream of transformed data words, and mapping the transformed data words of the stream to modulation symbols according to a first symbol mapping scheme by the symbol mapping unit, wherein the mapping of the transformed data words of the stream according to the first symbol mapping scheme results in modulation symbols according to the mapping of the data words of the provided stream prior to transformation according to the second symbol mapping scheme and wherein the first and the second symbol mapping scheme have different distributions with respect to the Hamming distance of data words representing nearest neighbors in a representation of the constellation of the modulation symbols of the modulation scheme.