Patent ID: 7526047

Claim:
A method for coding a message into space-time trellis codes (STTCs) in a multi-input multi-output (MIMO) communication system, comprising the steps of: coding a message with an encoder, into space-time trellis codes by group codes over label alphabets and H-symmetric labeling, wherein H-symmetric labeling is a modulation function mapping the group codes over the label alphabets to a corresponding point in a constellation; wherein the step of coding includes producing a label alphabet by matrix-multiplying a binary sequence of the message by generator matrix G; and coding the label alphabet into STTCs c by H-symmetry labeling mapping, wherein the binary sequence u t of the message at time t is coded into STTC c t by equation 1: c t = M ( u t , Ā G T ) [Equation 1] wherein ū t is a binary sequence over label alphabet A that is to be transmitted through m transmit antennas, G is a generator matrix, where G is dependent on the number of memory elements in the encoder, Operation {circle around (x)} A is matrix multiplication defined by addition and multiplication of Ā, Ā denotes the field whose algebraic structure under addition is isomomhic to the label alphabet A, and M is an H-symmetric labeling mapping function.