OFDM receiver for detecting FSK modulated signals
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United States of America Patent
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Dec 26, 2006
Grant Date -
Jan 27, 2005
app pub date -
Jul 22, 2003
filing date -
Jul 22, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An OFDM receiver detects FSK symbols in a communications network. An FFT has an input connected to receive temporal samples of a received, frequency-hopped FSK signal. Outputs of the FFT represent the FSK signal in a frequency domain. The outputs are grouped according to predetermined frequencies assigned by a transmitter of the FSK signal. An energy for each group of outputs is determined, and the energies of each group are then compared to recover a data stream from the FSK signal.
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