H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/14 (2006.01) H04L 27/148 (2006.01)
Patent
CA 2703403
A radio receiver may determine whether a received frequency modulated radio signal includes interference from an adjacent channel. The receiver may compare a frequency deviation above the center frequency of the received signal to a frequency deviation below the center frequency of the received signal. The receiver determines that the radio signal is affected by adjacent channel noise when the frequency deviation below the center frequency is substantially different from the frequency deviation above the center frequency. Alternatively, the presence of noise from an adjacent channel may be detected by comparing a positive amplitude and a negative amplitude of a demodulated version of the frequency modulated radio signal. In this alternative, the receiver determines that the radio signal is affected by adjacent channel noise when the extent of the positive amplitude is substantially different from the extent of the negative amplitude.
Axtmann Olaf
Benz Christoph
Koerner Andreas
Schmauderer Philipp
Harman Becker Automotive Systems Gmbh
Oyen Wiggs Green & Mutala Llp
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