Patent ID: 8451814
Filing Date: 2013-05-28
Classification: H04H,H04W

Abstract:
1. A method comprising: at a terrestrial broadcast station, receiving a GPS signal; the broadcast station using the GPS signal to generate a subcarrier signal, wherein the subcarrier signal is phase-locked to the GPS signal; the terrestrial broadcast station generating a timing signal comprising timing information, wherein the timing signal is phase-locked to the GPS signal; the terrestrial broadcast station modulating the timing signal onto the subcarrier signal; after modulating the timing signal onto the subcarrier signal, the terrestrial broadcast station transmitting a terrestrial broadcast signal that includes the subcarrier signal, thereby providing the subcarrier signal for use by a base station as a high-stability reference signal for local-oscillator stabilization at the base station, and thereby providing the timing information for use by the base station to determine a time-of-flight delay between the broadcast station and the base station, wherein the base station uses the timing information and the time-of-flight delay to determine timing with which to transmit data frames for frame-start synchronization.