| 摘要 |
The invention relates to a method and an arrangement for transmitting a digital signal consisting of symbols, which arrangement comprises a coder ( 308 ) for coding complex symbols to channel symbols in blocks having the length of a given K, means ( 312 ) for transmitting the channel symbols via several different channels and two or more antennas ( 314 to 318 ). The coder ( 308 ) is arranged to code the symbols using a code matrix, which can be expressed as a sum of 2K elements, in which each element is a product of a symbol or symbol complex conjugate to be transmitted and a NxN representation matrix of a complexified anti-commutator algebra, extended by a unit element, and in which each matrix is used at most once in the formation of the code matrix. A code matrix is also provided which is formed by matrices of a portion of the symbols placed on the diagonal of the code matrix and by matrices of a second portion of symbols along the anti-diagonal of the code matrix.
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