FM radio system employing time shared wide SCA for digital data band
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United States of America Patent
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-
Jun 27, 1995
Grant Date -
N/A
app pub date -
Nov 10, 1992
filing date -
Nov 10, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A wide band, wide area FM-SCA radio system has a central station that transmits multiple audio signals and digital data signals through a satellite network to FM stations participating in the system. Each FM station demodulated and time multiplexes the audio and digital signals with a control signal to form a first baseband waveform having a frequency range corresponding to the SCA frequency bandwidth. The first baseband waveform and a regular FM baseband waveform are combined into a composite band waveform that is single-sideband modulated onto the station carrier for retransmission to FM-SCA receivers in the coverage area. Each FM-SCA receiver demodulates the received signal and separately processes the regular FM signal, the FM-SCA audio signals, and the FM-SCA digital data signals. A user interface is provided for audio output selection.
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