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Recentry, interference of artificial noises from electrical power transfer becomes large and deterioration of sound quality of AM radio is worried. The authors proposed a noise suppression system for AM radio using quadrature demodulation and PI algorithm. It is expected that the noise suppression effect is reduced when the system has a synchronization error. In this paper, an effect of synchronization...
In recent years, electronics and large appliances became popular. However, a noise from the appliances would interfere with radio communication system. The artificially generated noise from the appliances has a periodicity in frequency. In this paper, a periodical noise suppression system using a frequency shift is proposed. Suppression effect for the periodical noise by the proposed system is confirmed...
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