H - Electricity – 04 – H
Patent
H - Electricity
04
H
H04H 40/45 (2008.01) H04H 40/72 (2008.01) H04B 1/10 (2006.01) H03D 3/00 (2006.01)
Patent
CA 2414189
This invention provides a method for reducing radio frequency interference in an FM in-band on-channel digital audio broadcasting receiver. The method comprises the steps of receiving a composite signal including a signal of interest and an interfering signal, demodulating the composite signal to produce a first demodulated signal, computing a first binary soft decision from the first demodulated signal, processing the composite signal to produce a processed signal, demodulating the processed signal to produce a second demodulated signal, computing a second binary soft decision from the second demodulated signal, and combining the first and second binary soft decisions to produce an output signal. Radio receivers that utilize the above method are also included.
Cette invention porte sur un procédé de réduction des interférences dans un récepteur de diffusion FM audio numérique, intrabande, sur le canal de réception. Ce procédé consiste à recevoir un signal composite comprenant un signal d'intérêt et un signal brouilleur, démoduler le signal composite pour générer un premier signal démodulé, calculer une première décision pondérée binaire à partir du premier signal démodulé, traiter le signal composite pour obtenir un signal traité, démoduler le signal traité pour générer un second signal démodulé, calculer une seconde décision pondérée binaire à partir du second signal démodulé et combiner les première et seconde décisions pondérées binaires pour générer un signal de sortie. L'invention porte également sur des récepteurs radio qui utilisent le procédé précité.
Baird Jeffrey S.
Kroeger Brian William
Ibiquity Digital Corporation
Smart & Biggar
LandOfFree
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