SCA Data transmission system with a raised cosine filter

Details SCA Data transmission system with a raised cosine filter SCA Data transmission system with a raised cosine filter

1979-11-08

1983-11-22

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

370 71, 381 4, H04H 500, H04L 2503

Patent

active

044173490

ABSTRACT:
A system and method for transferring digital data via the sub-carrier of a commercial broadcast FM radio station. Digital data generated by an originating subscriber is shaped with substantially a raised cosine response in the time domain. The shaped signal is then pre-emphasized and used to frequency modulate (direct angle modulate) a sub-carrier. The sub-carrier in turn frequency modulates the carrier and the data is transmitted by the radio station along with its commercial program. A receiving subscriber detects the sub-carrier and decodes and displays the originated data.

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