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Macro-Network Location Determination, Local-Oscillator Stabilization, And Frame-Start Synchronization Based On Nearby FM Radio Signals
Macro-Network Location Determination, Local-Oscillator Stabilization, And Frame-Start Synchronization Based On Nearby FM Radio Signals
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机译：基于附近FM无线电信号的宏网络位置确定，本地振荡器稳定和帧开始同步
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摘要
Exemplary methods and systems may generally be implemented to allow a macro-network base station without access to a GPS reference signal to provide some or all of the functionality for which existing macro-network base stations typically rely on GPS. In a first aspect, an exemplary macro-network base station may determine its location using a location-determination technique that is based upon the angles of arrival of FM radio signals from nearby FM stations. In a second aspect, an exemplary macro-network base station may stabilize its local oscillator by phase-locking its local oscillator to an FM radio signal, and periodically adjusting its local oscillator to account for phase drift of the FM radio signal. And in a third aspect, an exemplary macro-network base station may synchronize its frame-start timing with a nearby base station using a frame-start timing signal that the base station has synchronized to frame transmissions from the nearby base station during a setup routine.
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