A new approach to VHF/FM broadcast receiver using digital signal processing techniques

This paper describes the development of a new VHF/FM broadcast receiver using digital signal processing (DSP) techniques. The developed method gives improved receiver performance, and enables it to be integrated into general digital signal processing. This receiver realizes FM demodulation, a stereo decoder and noise reduction by using DSP. We adopted a quadrature type FM demodulator for its simple structure, and combined it with a newly developed AM (amplitude modulation) cancellation process, to reduce the demodulated signal distortion. We have also developed an extended sampling rate conversion technique to synchronize the sampling rate with the broadcast pilot signal utilizing interpolation-decimation filtering, while the stereo decoder process itself has been based on a synchronous sampling type operation.