Importance

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Abstract

Forward link communication is achieved utilizing a conventional television broadcast station, either utilizing an entire presently unused TV channel or in a shared TV mode, with the return link communication being achieved using narrow band communication techniques for relatively low data rate communication through conventional television receiver aerials to a central receiver near the television station transmitter. The carrier reference of a local AM radio station is used as a synchronizing reference for the data streams and to allow the very close sepraration of each band in the return communication link to allow a large number of remote receivers to simultaneously communicate in the reverse link. Alternatively, the TV Chroma subcarrier serves this purpose.

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First Claim