Patent ID: 8233558

Claim:
An encoder comprising: a space-time encoding component for assembling, from a block of input symbols, a plurality of blocks of output symbols; and a randomizing component adapted for randomizing symbols from said plurality of blocks of output symbols for obtaining a random combinations of said plurality of blocks of output symbols, each random combination of said plurality of blocks of output symbols constituting a block of symbols for transmission by a separate node from a plurality of transmitter nodes; each block of output symbols being a codeword: wherein said randomizing component is either randomly assigned a column of said space-time code matrix to said each node from said plurality of transmitter nodes, said randomly assigned column constituting a block of symbols; or said randomizing component assigned to said each node from said plurality of transmitter nodes a column comprising sum of randomized columns of said space-time code matrix, each randomized column comprising a column of said space-time code matrix multiplied by a random predetermined quantity.