Space-Time Multi-Block Coding and Beamforming with Side Information for Mobile Transceivers

In this paper, we first introduce a quasi-orthogonal space-time block coding scheme over multiple antenna block fading channels. The proposed code exploits temporal diversity due to the mobile nature of the block fading channel as well as spatial diversity due to multiple antennas. We then propose a beamforming strategy over temporally correlated channel blocks. It is assumed that the channel undergoes Doppler frequency shift and an AR1 channel model is adopted to track the channel temporal correlation coefficients at the transmitter. Using the combination of transmit beamforming and quasi-orthogonal block coding over adjacent channel blocks, we accomplish to achieve the available array gains on top of notable diversity gains and coding gains, compared to the standard solutions in the conventional wireless communication schemes. In our model, the knowledge of the channel statistics at the transmitter side is based on the approximation of the Jakes' model and does not require frequent feedback updates from the receiver. Simulation results show the superiority of our scheme to the existing coding schemes with knowledge of the channel statistics at the transmitter.