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AssigneeMotorola, Inc.
InventorsJona Cohn, Allen L. Davidson, Anthony P. van den Heuvel
Estimating the term…
Simulcast distortion in a receiver when using a same-frequency repeater is minimized by applying double modulation to a signal that is broadcast to the same-frequency repeater. A voice signal is applied without delay as AM on a carrier to a modulation index of up to 30%, and the same signal is also applied as FM on the same carrier with a time delay equal to the time delay in the same-frequency repeater. The same-frequency repeater detects the AM and applies the detected signal as FM on a carrier that is rebroadcast. Received FM signals are thus delayed by substantially the same amount whether they are received from the original broadcast or the same-frequency repeater.
A method of minimizing simulcast distortion when broadcasting an information signal directly to an FM receiver and indirectly to the FM receiver through a same-frequency repeater comprising the steps of:
An apparatus for minimizing simulcast distortion when broadcasting an information signal to a receiver, the apparatus comprising:
Dependencies are inferred from the claim text.