Patent ID: 8405536
Filing Date: 2013-03-26
Classification: H04L

Abstract:
1. A communication system for a frequency-shift keying (FSK) signal, comprising: a time-to-digital converter, receiving an in-phase signal of the FSK signal, and generating a digital signal according to the in-phase signal; a digital low-pass filter, receiving the digital signal, and generating a filtered signal comprising N continuous words according to the digital signal, wherein N is an even integer; and a digital signal processor, dividing up the N continuous words into N/2 word sets in order, wherein each of the N/2 word sets comprises a first word and a second word, and if a difference between the first word and the second word meets a predetermined condition, the digital signal processor generates an output data and an output clock according to all the first words and the second words that have the difference which meets the predetermined condition.