Patent ID: 8792324

Claim:
A transmission apparatus for transmitting a block of data over a plurality of transmission channels, the transmission apparatus comprising: a modulator operable to select one of a plurality of constellation points in accordance with the block of data to be transmitted, each of the plurality of constellation points having N components; and a transmitter operable to transmit each component of the selected constellation point over a different one of the plurality of transmission channels, wherein the plurality of constellation points are defined by positions thereof within an N-dimensional space, the positions being obtained by applying an orthogonal transformation to a subset of which is an N-dimensional integer lattice, N is a multiple of four, and the orthogonal transformation has one of (i) an N-by-N matrix representation with absolute values of all elements on a main diagonal equal to a first value, and with absolute values of all elements not on the main diagonal equal to a non-zero second value, and (ii) a matrix representation obtained by permuting rows and/or columns in an N-by-N matrix representation with absolute values of all elements on a main diagonal equal to a first value, and with absolute values of all elements not on the main diagonal equal to a non-zero second value.