The Research and Application of FM Circuit based on CD4046 in the Traffic Information Release System

The content of the intelligent transportation system include many aspects of which the key part is to realize the advanced traffic information release system. This system completes the information release mainly through the use of the wireless communication technology. The paper briefly introduces the structural design of the traffic information collection and release system, and puts forward an economic and reliable wireless data transmission program which uses the traffic information data of the subcarrier channel transmission to carry out the remodulation for the base-band analog signal (subcarrier modulation). The subcarrier modulation and demodulation use integrated PLL chip, CD4046. The paper expatiates on the method to realize remodulation and demodulation, and its application in the system.