Application of Walsh Functions to an FM Stereo Demodulator

Takahashi S, Iida H. Application of Walsh Functions to an FM Stereo Demodulator. J Audio Eng Soc. 1985;33(9):669-673. Available from: https://aes.org/publications/elibrary-page/?id=4430

@article{Takahashi1985_4430,
  author = {Takahashi, Susumu and Iida, Hiroshi},
  title = {{Application of Walsh Functions to an FM Stereo Demodulator}},
  journal = {Journal of the Audio Engineering Society},
  volume = {33},
  number = {9},
  pages = {669--673},
  year = {1985},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=4430}
}

TY  - JOUR
TI  - Application of Walsh Functions to an FM Stereo Demodulator
AU  - Takahashi, Susumu
AU  - Iida, Hiroshi
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 33
IS  - 9
SP  - 669
EP  - 673
PY  - 1985
DA  - 1985/09/06
UR  - https://aes.org/publications/elibrary-page/?id=4430
PB  - Audio Engineering Society
LA  - en
AB  - 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 this new demodulator no such noise is generated because the switching square waves are derived from Walsh functions. The low-pass filter can therefore be eliminated, producing a phase-linear composite signal characteristic with high separation and low distortion.
ER  -