Radiotelephone system with the character of a local or auxiliary communications apparatus
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United States of America Patent
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Jul 2, 1996
Grant Date -
N/A
app pub date -
Sep 12, 1994
filing date -
Aug 21, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A transmission process with specific adaptive properties in an analog or mixed analog-digital transmission system, having a fixed base station and a number of subscriber station independent of one another. Information from the base station is transmitted to the subscriber stations wherein each information channel is converted by suppressed carrier, single-side band modulation to a narrow-band signal. The narrow-band signals are arranged spectrally adjacent one another in a frequency multiplex allocation scheme and are modulated on a carrier set at a higher frequency range using phase or frequency modulation. Each subscriber accesses no more than one of the information channels. Information transmissions from the subscriber stations to the base station is performed using narrow-band radio channels.
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