A method for controlling phase difference between propagation channels for short-range MIMO transmission

Higher data rate wireless transmission systems are needed to meet the needs for high-speed wireless transmission of high definition videos and large files. In wireless communications, the multiple-input multiple-output (MIMO) transmission technique [1] has been gathering attention because it can increase the wireless transmission rate without expanding the frequency bandwidth through the use of multiple antennas at the transmitter and receiver. The MIMO technique has found practical consumer use in high-speed wireless LAN systems [2].