Method and apparatus for transmitting information by radio
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United States of America Patent
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Sep 21, 2004
Grant Date -
Jun 14, 2001
app pub date -
Dec 5, 2000
filing date -
Jun 5, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an apparatus and procedure for radio transmission of information using a middle channel, a first side channel and a second side channel. The transmitted middle channel is FM-modulated by a suitable frequency. A signal symmetrically amplitude-modulated with respect to the center frequency of the middle channel is generated, and a first amplitude-modulated single side band (LSB) and a second amplitude-modulated single side band (USB) are formed from the amplitude-modulated signal. The first single side band (LSB) is modulated by the information in the first side channel to form two side bands for the first single side band, and the second single side band (USB) is modulated by the information in the second side channel to form two side bands for the second single side band. The middle channel FM signal, the modulated first single side band (SSB) and the second modulated single side band (SSB) are then combined in a combiner for simultaneous transmission of all three channels.
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