I/Q imbalance compensation and channel equalization algorithm for MIMO-OFDM systems

In this paper, both the I/Q imbalance compensation and the channel equalization approach are presented for space-time-block-code (STBC) MIMO-OFDM systems. The I/Q imbalance compensation scheme is composed of self-calibration and tracking processes. The self-calibration process is further divided into two stages, symmetric- and anti-symmetric-tone, employed to extract the amplitude- and the phase-mismatch of transmitter (Tx) and receiver (Rx) I/Q imbalance for the end-user in the system power-on duration.