In the conventional FM stereo demodulator, interference from adjacent channels is demodulated by the harmonics of a square wave switching signal resulting in a high pitched whistle type noise. In our new demodulator, such noise is not generated because the switching square waves are derived from Walsh functions. We can therefore eliminate the low-pass filter, producing a phase-linear composite signal characteristic with high separation and low distortion.

Authors: Takahashi, Susumu; Iida, Hiroshi
Affiliation: Sansui Electric Company, Ltd., Tokyo, Japan
AES Convention: 74 (October 1983) Paper Number: 2031
Publication Date: October 1, 1983
Subject: Signal Processing—Analog

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