Low Inter-Channel Interference Synchronization Codes Design for MIMO-OFDM Systems

In this paper, a synchronization code based on hadamard matrix has been designed for MIMO-OFDM systems. A new timing synchronization scheme is introduced. Based on orthogonal properties of the new synchronization code, the transmitted signals by each transmit antenna can cancel most of the inter-channel interference. The synchronization estimator is designed to have matching filter function, the time offset of each different transmit antenna can be directly estimated without ICI which is an advantage over existing algorithms. In addition, the proposed synchronization code can be widely generated from other code, it can be generally applicable in MIMO-OFDM system. The performance of the proposed approach verify the effectiveness of combating ICI, and is analyzed with other methods to confirm that it has a considerable timing detection probability for MIMO systems.

[1]  Chao Zhang,et al.  Two-Dimensional Circle Antenna Layout for Aeronautical MIMO Communications , 2013, IEEE Antennas and Wireless Propagation Letters.

[2]  Donald C. Cox,et al.  Robust frequency and timing synchronization for OFDM , 1997, IEEE Trans. Commun..

[3]  Yong-Hwan Lee,et al.  Sequence acquisition of DS-CDMA systems employing Gold sequences , 2000, IEEE Trans. Veh. Technol..

[4]  Daesik Hong,et al.  A novel timing estimation method for OFDM systems , 2003, IEEE Communications Letters.

[5]  Vijay K. Bhargava,et al.  On timing offset estimation for OFDM systems , 2000, IEEE Communications Letters.

[6]  Chin-Liang Wang,et al.  Optimized Joint Fine Timing Synchronization and Channel Estimation for MIMO Systems , 2011, IEEE Transactions on Communications.

[7]  Chao Zhang.  Cognitive Non-Continuous Carrier Interferometry Orthogonal Signal Division Multiplex Transmission In Autonomous Vehicular Communications , 2011, IEEE Journal on Selected Areas in Communications.

[8]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..

[9]  Daesik Hong,et al.  A novel timing estimation method for OFDM systems , 2002, Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE.