Real-Time Video Transmission over MIMO OFDM Channels Using Space-Time Block Codes

In this paper we consider the problem of faded wireless image and video transmission schemes over multi-input multi-output (MIMO) orthogonal frequency division multiplexing (OFDM) channels that are energy and the bandwidth constrained. A computationally inexpensive analytic mean square error (MSE) distortion rate (D-R) estimator for progressive wavelet coders which generates an exact D-R (distortion rate) function for 2-D and 3-D SPIHT algorithm is utilized from our previous work. Using the D-R function, a joint source-channel coding scheme using optimal equal error protection (EEP) is presented. Both analytic and Monte-Carlo simulations are presented for image and video sources. A system that uses two transmit antennas and two receive antennas expends 12 dB less in energy per bit for the same performance as a SISO system. Our results are also significantly better than outage probability JSCC schemes used by other authors. The joint source-channel coding (JSCC) scheme demonstrates that MIMO OFDM can achieve real-time high quality video transmission in low energy regions and the system is robust against the delay spread and Doppler frequency shift.