Patent ID: 7835696

Claim:
A wireless multicarrier transmission method, implemented on a wireless multicarrier transmission device, in which a multicarrier transmission uses n modulated frequency subcarriers (n is an integer number), the method comprising: detecting a fading condition of each subcarrier to generate fading channel profile information; sorting the subcarriers from a highest fading channel profile information to a lowest fading channel profile information; selecting, at the wireless multicarrier transmission device, a standard modulation scheme, a lower modulation scheme, and a higher modulation scheme, wherein each modulation scheme codes a different number of bits per subcarrier; selecting, at the wireless multicarrier transmission device, three integer numbers x, y, and z representing the number of subcarriers for modulation with said lower modulation scheme, with said standard modulation scheme, and with said higher modulation scheme respectively, wherein the sum of x, y, and z is n and a resulting number of coded bits of a multicarrier symbol is constant; fixing, at the wireless multicarrier transmission device, the selected combination x, y, and z; and using, at the wireless multicarrier transmission device, the selected combination x, y, and z for adaptive modulation comprising 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.