Patent ID: 8290022
Filing Date: 2012-10-16
Classification: H04W

Abstract:
1. A multi-carrier transmission method of the type making use, prior to orthogonal modulation, of symbol spreading respectively on first and second dimensions including a frequency dimension, by means of a spreading code c of respective lengths in the two dimensions of SF t and SF f , the number of elements making up the code determining a maximum number of users Numax, a number of users Nu being determined to be less than or equal to said maximum, the method being applied to transmitting orthogonal symbols over at least one transmit antenna, the orthogonal symbols coming from a module (MoD) for modulation by Nfft orthogonal functions determining Nfft sub-carriers from amongst Nc carriers, having spread symbols modulated thereon: with: d C p varying over the range 0 to Nc−1; k being the user index varying over the range 1 to Nu; n being the orthogonal symbol index varying over the range 0 to Nd−1; Nd being the number of orthogonal symbols in a frame; └z┘ being the integer portion of z; which symbols are representative of input information data presented in frames and associated with Nu users, the method further comprising: a step of determining at least one set of powers pe