Demodulation device and demodulator

• Main Authors: ZENG XILIN, SHEN HONGHUI, FENG RUYI, FANG HUI
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a demodulation device and a demodulator, the demodulation device oversamples an analog signal transmitted from a sending end through an analog-to-digital conversion module, the analog signal is an analog signal based on frequency shift keying, and the oversampled analog signal is converted into a serial oversampled digital signal; the frequency shift keying signal demodulation method comprises the following steps: sampling an oversampling signal, delaying the oversampling signal through a delay buffer module to output a target delay sampling digital signal, multiplying the oversampling signal and the target delay sampling digital signal through a multiplication module, and finally filtering a multiplication result through a filtering module to obtain a demodulation result of the frequency shift keying signal. The method can be adaptive to carrier frequency demodulation under the BELL standard and carrier frequency demodulation under the CCITT V.23 standard, a demodulation system does n