Patent ID: 8428008

Claim:
A method for encoding a symbol in a transmitter of a wireless network, wherein the network uses multiple-input and multiple-output (MIMO) orthogonal frequency division multiplexing (MIMO-OFDM), comprising the steps of: partitioning the sub-carriers to be used for transmitting the symbol into a set of K groups of contiguous sub-carriers, and for each group further comprising the steps: providing a set of N K −1 modulation symbols D k (1), D k (2), . . . , D k (N k −1), wherein there is one modulation symbol for each sub-carrier in the group; mapping each modulation symbol D k (n), of group k, to a corresponding mapped modulation symbols X k (n) according to m ⁡ ( k ) = 1 N K - 1 ⁢ ∑ n = 1 N K - 1 ⁢ ⁢ D k ⁡ ( n ) X k ⁡ ( n ) = α 1 ⁡ ( k ) ⁢ ( D k ⁡ ( n ) - m ⁡ ( k ) ) + β ⁡ ( k ) ⁢ ⁢ n = 1 , … ⁢ , N K - 1 X k ⁡ ( N K ) = α 2 ⁡ ( k ) ⁢ m ⁡ ( k ) , where m(k) is a sample-mean of the set of modulation symbols of group k, α 1 (k), α 2 (k) and β(k) are constants, wherein the constants are predetermined and positive.