Patent ID: 7924958

Claim:
An apparatus for receiving a data stream in a multi-antenna system, the apparatus comprising: an interference canceler for separating a received signal into a plurality of symbol sequences, a number of transmission symbol sequences being equal to a number of transmitted symbols, and eliminating interference components from symbol sequences using reconstructed signals received for the symbol sequences; a channel matrix transformation portion for eliminating an interference component caused by a later signal from interference-eliminated symbol sequences by channel matrix transformation; a delay portion for delaying channel matrix-transformed symbol sequences received from the channel matrix transformation portion by delay times; a decoder for creating estimates of the transmitted symbols by decoding delayed symbol, sequences using a channel matrix estimate; an encoder for encoding the transmitted symbol estimates by a precoder; and a reconstructor for generating the reconstructed signals by code symbols received from the encoder by channel matrices corresponding to the code symbols and providing the reconstructed signals to the interference canceler, wherein the later signal includes not-yet decoded symbols and is a signal later than the current decoded signal.