Patent ID: 7173979
Filing Date: 2007-02-06
Classification: H04L

Abstract:
1. Method for transmitting information symbols using a plurality of carriers, the method comprising the following steps: generating a first transmission symbol from an information symbol; generating a second transmission symbol from the same information symbol, the second transmission symbol being different to the first transmission symbol, wherein the steps of generating the first transmission symbol and the second transmission symbol are performed using a signal constellation diagram having a predefined number of different states in a complex constellation plane, the first transmission symbol having a first state in the complex constellation plane, and the second transmission symbol having a second state in the complex constellation plane, wherein the steps of generating the first transmission symbol and the second transmission symbol are performed such that the first state is one state of a plurality of predefined phase states and the second state has a different phase state than the first state, or the second state has the same phase state as the first phase state but has a different amplitude than the first state; modulating the first transmission symbol on a carrier, and transmitting the carrier modulated with the first transmission symbol at a first time; and modulating the second transmission symbol on a carrier, and transmitting the carrier modulated with the second transmission symbol at a second time, the second time being after the first time, wherein N different carriers, N information symbols, N first transmission symbols and N second transmission symbols are present, and wherein the step of modulating the first transmission symbol or the step of modulating the second transmission symbol include an inverse Fourier transform of the N carriers modulated with the first or second transmission symbols.