Method and apparatus for data transmission using chirped frequency-shift-keying modulation
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United States of America Patent
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Aug 28, 1984
Grant Date -
N/A
app pub date -
Sep 14, 1981
filing date -
Sep 14, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for transmission of digital data utilizes a carrier frequency offset in a first frequency direction for a first binary condition, and offset in a second frequency direction for the remaining binary condition, at the start of a bit time interval. The carrier frequency is swept in a preselected frequency direction during each bit time interval, to produce a chirped frequency-shift-keyed waveform in the frequency domain, for transmission of each bit of binary data. Frequency-shift-keyed demodulation is utilized at a receiving end, with the receiver synchronized to the transmitter bit time interval, to recover the transmitted digital data. Apparatus for data transmission using this chirped frequency-shift-keyed modulation waveform is disclosed.
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