Apparatus and method for detecting space-time multi-user signal of base station having array antenna

An apparatus for detecting a space-time multi-user signal in a base station having an array antenna, the apparatus comprising:

• a received signal processing means for converting received signals through an array antenna into a digital baseband signals by over-sampling each received signal corresponding to each antenna;
• a data/reference splitting means for receiving the digital baseband signals and dividing the digital baseband signals into data signals and reference signals;
• a channel estimating means for receiving the reference signals and estimating a delay time information of paths for each user and a channel impulse response corresponding to each path per antenna;
• a beamforming weight vector generating means for receiving the reference signals and the delay time information of to thereby generate a beamforming weight vector of each path;
• a system matrix generating means for receiving the channel impulse response and the beamforming weight vector to there by generate a system matrix and calculating a correlation matrix of the system matrix for each antenna and a sum of the correlation matrix;
• a code matched filtering means for receiving the data signals and the system matrix to multiply the system matrix to the data signals per each antenna;
• a antenna combining means for combining signals outputted from the code matched filtering means;
• and
• an interference cancelling means for cancelling an interference signal of output of the antenna combining means by using the sum of the correlation matrix.