blue shifted em radiation due to earth velocity relative to cmbr

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     Just a theory and the device would have to be really efficient.  Earth's velocity relative to the cmbr (cosmic background radiation)  appears to be in excess of 600km/second.  If we create a light scource directed at a receiver and positioned so that the receiver is moving in the direction of the transmitter the light frequency will be blue shifted.  Light travels at a set speed.  The transmitter is moving at the same speed as the receiver but the light is moving at a constant speed and exists independent of the scource.  The receiver will bang into the light at 600km/s gain.