Design of FSK Communications System Modulation Demodulation Circuit

The frequency-shift keying(FSK) transmits the digital signal with different frequency carrier,and controls the frequency of intelligence signal with the digital based and signal.According to the research of downloading and simulation of FPGA chip,then designation for total modular of modulation demodulation system by the VHDL language is generated.After emulating the modular,the top layer document is formed,and the overall design of the system is completed,finally it is downloaded and simulated on the FPGA chip,and realized the entire digital FSK correspondence and confirmed that this design is correct.The design result indicated that the FSK communication system designed by large scale of integrated circuit is good in high-transmission efficiency,low-error rate as well as anti-jamming.