Patent ID: 7668525
Filing Date: 2010-02-23
Classification: H04H

Abstract:
1. A stereo receiving system comprising: a plurality of antennas for receiving a plurality of radio frequency (RF) signals having a common frequency but potentially different phases; a receiving device having at least an amplitude modulated (AM) detector output and a frequency modulated (FM) detector output that includes a pilot signal, wherein said receiving device is in electrical communication with said plurality of antennas; a plurality of summing devices in electrical communication between at least one of said plurality of antennas and said receiving device; a phase lock loop device in electrical communication with said receiving device, wherein said phase lock loop device locks onto said pilot signal and emits a perturbation frequency signal; a controllable phase shifter device in electrical communication between at least one of said plurality of antennas and at least one of said plurality of summing devices, wherein said controllable phase shifter device is responsive to at least said FM detector output and shifts the phase of said at least one said plurality of RF signals by an amount sufficient to eliminate a phase error between said plurality of RF signals; and a gain-control device in electrical communication between said plurality of antennas and said receiving device, wherein said gain-control device controls a signal-to-noise ratio of said RF signals aligned from said plurality of antennas.