FIELD: radio engineering; digital audio-casting receivers.
SUBSTANCE: proposed method for reducing noise in frequency-modulated in-band digital channel audio-casting system includes reception of composite signal incorporating useful signal and noise signal; demodulation of composite signal to obtain first demodulated signal; calculation of first binary relaxed solution basing on first demodulated signal; processing of composite signal to obtain processed signal where frequency-modulated signal of first adjacent channel is suppressed; demodulation of processed signal to obtain second demodulated signal; calculation of second binary relaxed solution basing on second demodulated signal; and combining of first and second relaxed solutions to obtain output signal. Receivers implementing proposed method are also given in description of invention.
EFFECT: enhanced effectiveness of suppressing noise from frequency-modulated signals with respect to digital part of audio-cast signal.
29 cl, 7 dwg
