Digital demodulator with low sampling frequency

摘要

The demodulator has an analog-digital converter (21) that samples input signal, where the current sampling frequency of the converter is three times the carrier current frequency of modulation. The samples issued from the converter are high at a multiplier (22). The multiplier has two inputs that receive signal output from the converter. Independent claims are also included for the following: (A) a method of demodulating modulated signal (B) a read-write terminal of a communication system.