Patent ID: 7684756
Filing Date: 2010-03-23
Classification: H04L

Abstract:
1. A wireless multicarrier transmission method, wherein a multicarrier transmission uses n modulated frequency subcarriers (n is an integer number), a fading condition of each subcarrier is detected to generate fading channel profile information; the modulation of each subcarrier is determined by the following steps: precalculating a plurality of combinations x, y, and z defining x subcarriers for modulation with a lower modulation scheme, y subcarriers for modulation with a standard modulation scheme, and z subcarriers for modulation with a higher modulation scheme (x, y, and z are integer numbers) such that a resulting number of coded bits of a multicarrier symbol is constant; wherein the sum of x, y, and z is n; selecting one of the combinations for said multicarrier transmission in order to fix the integer numbers x, y, and z during said multicarrier transmission; and modulating the x subcarriers having low fading channel profile information with the lower modulation scheme, modulating the y subcarriers having medium fading channel profile information with the standard modulation scheme, and modulating the z subcarriers having high fading channel profile information with the higher modulation scheme.