Pulse or digital communications – Repeaters – Testing
Patent
1992-10-23
1994-05-10
Cain, David C.
Pulse or digital communications
Repeaters
Testing
380 10, 380 13, 380 19, 380 20, H04N 7167
Patent
active
053115430
ABSTRACT:
A 2-stage SS (spread-spectrum) system for transmitting a coded TV signal, said coded signal consisting of first components requiring near-perfect transmission and second components for which somewhat imperfect transmission is acceptable, wherein a first SS process is used to determine the relative SNR of the recovered said second components, wherein the output of said first SS process is added to said first components to form combined signals, wherein a second SS process operates on said combined signals and is used to nullify the effects of multipath in the transmission channel and/or establish a multistep threshold, wherein the output of said second stage is modulated on a carrier, and wherein a transmitter receives said modulated carrier and generates a transmission signal therefrom.
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