Patent ID: 7974361

Claim:
Space-time coding process for a pulse UWB telecommunication system having a plurality P of radiation elements, characterised in that said process associates any combination s 1 , s 2 , . . . , s P of P symbols belonging to a PPM modulation alphabet with M modulation positions, where M>P+1, for generating a space-time code defined by the matrix: C = ( s 1 s 2 ⋯ s P Ω ⁢ ⁢ s P s 1 ⋯ s P - 1 ⋮ ⋮ ⋱ ⋮ Ω ⁢ ⁢ s 2 ⋯ Ω ⁢ ⁢ s P s 1 ) with a possible permutation of its rows and/or columns, the symbols in each column of said matrix being intended to be emitted by a given radiation element and the symbols of each row of said matrix being intended to be emitted during use of a given channel, where Ω is a permutation of the modulation positions and the s 1 , s 2 , . . . , s P symbols satisfy the following constraint: s i ≠s j for i, j=1, . . . , P with i≠j Ωs i ≠s j for i=2, . . . ,P and j=1, . . . , i−1.