MIMO-OFDM Blind Multi-CFO Estimation: CS-MUSIC

In this paper, a new blind multiple carrier frequency offset (multi-CFO) estimate algorithm based on cyclostationary (CS) of received signal and classical MUSIC algorithm for multi- input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) systems is proposed. Theory analysis and computer simulation results show that the algorithm doesn´t require pilot symbols or training sequences, and has several advantages such as multiple different CFO estimate, no special limit on number of receive and transmit antennas but with little sensitivity to any stationary noise. Additionally, it can achieve fine performance even the symbol timing offset exist.