Effect of synchronization error and pseudo-noise on noise suppression system for am radio

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 error on the noise suppression system for AM radio is investigated. Then, a new method using pseudo-noise is proposed to solve the problem.