Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1996-10-02
1998-03-31
Chin, Stephen
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
370330, 370436, 370478, 379 59, 455 331, 455 541, H04B 166, H04J 400, H04Q 722, H04Q 730
Patent
active
057346780
ABSTRACT:
A terrestrial Rf telephone system provides a plurality of voice signal channels on a plurality of forward direction carrier frequencies, each carrier frequency having an associated predetermined bandwidth which is designed to accommodate one analog voice signal, and each carrier frequency containing a plurality of slots. The system includes a base station having a plurality of circuit paths for receiving a plurality of forward direction digitized voice signals; a plurality of compressors for compressing the voice signals; a processor for assigning each of the compressed voice signals onto a dynamically assigned frequency/slot; a plurality of channel controllers, each for sequentially combining the compressed digitized voice signals into a single transmit channel bit stream, with each compressed voice signal occupying a respective repetitive sequential time slot in the transmit channel bit stream; and a plurality of modulators for modulating the carrier frequencies. A portion of the carrier frequency within a portion of each slot remains unmodulated by the transmit channel bit stream to provide a phase reference signal.
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Avis Graham M.
Handzel Mark J.
Morley Steven Allan
Paneth Eric
Chin Stephen
Gluck Jeffrey W.
InterDigital Technology Corporation
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