Application of Walsh Functions to an FM Stereo Demodulator

Takahashi S, Iida H. Application of Walsh Functions to an FM Stereo Demodulator. In: AES Convention 74. Audio Engineering Society; 1983. Paper 2031. Available from: https://aes.org/publications/elibrary-page/?id=11733

@inproceedings{Takahashi1983_11733,
  author = {Takahashi, Susumu and Iida, Hiroshi},
  title = {{Application of Walsh Functions to an FM Stereo Demodulator}},
  booktitle = {AES Convention 74},
  note = {Paper 2031},
  year = {1983},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11733}
}

TY  - CPAPER
TI  - Application of Walsh Functions to an FM Stereo Demodulator
AU  - Takahashi, Susumu
AU  - Iida, Hiroshi
T2  - AES Convention 74
M1  - Paper 2031
PY  - 1983
DA  - 1983/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11733
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 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.
ER  -