Quaternary VMCK Modulation Signal Transmission Simulation

VMCK (Very Minimum Chirp Keying,VMCK) is a highly efficient ultra narrow band modulation techniques with narrow footprint,strong sideband suppression,data transmission efficiency.Frequency division multiplexing is a commonly used means of improving bandwidth efficiency.In the ultra-narrow band communication structure based on the modulation principle VMCK,the multi-band ultra-narrowband system four signal multiplexing system are built and analyzed.