The Analysis of Channel Characteristics and Implementation of Modem Based on Virtual Instrument in Intra-body Communication

The virtual instrument platform that has the merits of programming intuitively, rapid development and being easy to modify was introduced in this article to study the characteristics or performances of galvanic coupling intra-body communication. Then, the channel capacity of galvanic coupling intra-body communication under 10cm body channel was estimated with Shannon theorem. In addition, the function of modulation and demodulation of real intra-body communication system had been simulated by the way of data acquisition and LabVIEW programming to validate its feasibility in the communication system. What's more, the method of data acquisition and LabVIEW programming could play the role of modulation and demodulation in practical intra-body communication system, and which meant that it was feasible to apply the way to the communication. Moreover, according to the characteristics of body channel, FSK would be much more suitable for intra-body communication system than other two ones.