Telecommunications – Transmitter – Plural separate transmitters or channels
Reexamination Certificate
2011-01-25
2011-01-25
Kincaid, Lester (Department: 2617)
Telecommunications
Transmitter
Plural separate transmitters or channels
C455S003020, C455S101000, C455S108000, C455S110000, C455S126000, C370S347000, C375S267000, C375S285000, C375S299000
Reexamination Certificate
active
07877064
ABSTRACT:
The present invention provides methods, apparatus and systems for delivery of digital data to stationary receivers over a terrestrial wireless link at a low data rate using a new coded orthogonal frequency division multiplexing (COFDM) scheme. Digital data is encoded and modulated using coded orthogonal frequency division multiplexing (COFDM) to produce a data stream. The data stream is communicated to a stationary receiver via a terrestrial wireless link having a ratio of (i) 50% coherence bandwidth to (ii) allocated channel bandwidth of not greater than 50%. The COFDM scheme employed by the present invention overcomes the degradation of multipath fading induced by terrestrial channels, such as the Ultra High Frequency (UHF) broadcast channel.
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Cullen Larry T.
General Instrument Corporation
Khan Mehmood B
Kincaid Lester
LandOfFree
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