LOW POWER FSK DEMODULATOR

Saurav Singh

Abstract: Frequency shift keying (FSK) is the most common form of digital modulation in the high-frequency radio spectrum. The demodulation of Binary FSK involves complex operations on the modulated signal like reconstruction of carrier signal and multiplication of carrier signal with the modulated signal. In this paper, BFSK is realized as two separate ASKs and a much simpler incoherent method is proposed for demodulation of BFSK modulated signal. Since power consumption is one of the main factors in electronic devices, low power devices are always demanding. Power Consumption could be minimized by reducing the actual block diagram of the system by opting an alternative approach to achieve the same output signal. The same BFSK demodulator can be used to demodulate an ASK modulated signal if it follow certain criteria’s.

Keywords: FSK, ASK, Demodulator, filters, MATLAB

DOI: https://doi.org/10.15623/ijret.2015.0412050