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Using multiple-input-multiple-output processing for terrestrial multi-path channels is well known. We describe here its use in reducing a terminal's aperture for line-ofsight satellite communications. Differential delay and Doppler between a satellite-pair are equalized at the hub transmitter (for a point-to-point system employing a 2×1 space-time encoder) or the remote receiver (for a dualsatellite polarization diversity system for point-tomultipoint applications) via interference cancellation. System performance is provided for both cases.