A Novel Timing Synchronization Method for MIMO-OFDM Systems
Résumé
To increase the throughput of transmission systems,
MIMO-OFDM technology enables better transmission rate
and improves the reception. The synchronization between the
transmitter and the receiver has become a big challenge. A bad
timing synchronization causes the loss of a lot of information
in a MIMO-OFDM system. In this paper, a novel timing
synchronization method is proposed for a MIMO-OFDM
systems with Nt transmit antennas and Nr receive antennas.
The proposed method is based on transmit an orthogonal
CAZAC sequences over different transmit antennas [1].
Simulations results show that the proposed solution presents
a good performance at a low SNR (Signal to Noise Ratio) in
AWGN and multipath fading Rayleigh channels, where Doppler
Effect is not considered for current simulations. Furthermore,
this method can be implemented for MIMO-OFDM system up
to 8 × 8 as well. In the proposed method, the coarse and fine
timing synchronization are done at the same time at each receive
antenna due to the different training sequences transmitted over
different transmit antennas