Patent ID: 8422589
Filing Date: 2013-04-16
Classification: H04L

Abstract:
1. A method for transmitting data in a digital communication system, the method comprising: transmitting a data word modulated on a carrier according to a first mapping of data word values to modulation states, and transmitting the same data word modulated on another carrier according to a second mapping of data word values to modulation states, wherein: the second mapping of data word values to modulation states is obtained from the first mapping of data word values to modulation states by assigning to a respective data word value a complex value in said second mapping that has a position in a complex plane which is approximately mirrored from a position of a complex value assigned to said respective data word value according to said first mapping with respect to a point on a symmetry axis of a sub-plane in which the complex value assigned to said respective data word value according to said first mapping is located, and the data word modulated according to the first mapping and the data word modulated according to the second mapping are transmitted on consecutive subcarriers respectively.