| US 7,469,015 B2 | ||
| Signal transmission multiple antenna method and device | ||
| Vincent Le Nir, Rennes (France); Maryline Helard, Rennes (France); and Rodolphe Le Gouable, Cesson-Sevigne (France) | ||
| Assigned to France Telecom, Paris (France) | ||
| Filed on Dec. 16, 2003, as Appl. No. 10/737,160. | ||
| Claims priority of application No. 02 16200 (FR), filed on Dec. 16, 2002. | ||
| Prior Publication US 2005/0041751 A1, Feb. 24, 2005 | ||
| Int. Cl. H04B 7/02 (2006.01) | ||
| U.S. Cl. 375—267 | 11 Claims |
| 1. Method of transmitting a signal composed of a plurality of symbols from ne transmitting antennas, ne being a whole number greater than or equal to 2, the method comprising the steps of:
performing a linear pre-encoding operation on the symbols to be transmitted so as to generate, for each burst of m consecutive
symbols to be transmitted, m linear combinations of symbols, m being a whole number greater than or equal to ne, the linear pre-encoding operation consisting in applying to each vector of m consecutive symbols to be transmitted a complex
orthonormal pre-encoding matrix of dimension m×m so as to create the m linear combinations of symbols, and
for each burst of m consecutive symbols to be transmitted, coding the m linear combinations according to a space-time coding
so as to transmit one after the other blocks of q coded linear combinations, q being a whole number smaller than or equal
to m, each block of q coded linear combinations being transmitted from q′ transmitting antennas, q′ being a whole number greater
than or equal to q, each of the coded linear combinations of the block of q coded linear combinations being transmitted during
q″ consecutive temporal transmitting intervals specific to the block from one of the ne transmitting antennas, q″ being a whole number greater than or equal to q,
wherein the pre-encoding matrix is the Kronecker product of a Hadamard matrix of order
 by a matrix of the Special Unitary group SU(k), k being a whole number greater than or equal to 2.
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