基于表面波导的简化人体通信理论模型

原有人体通信理论模型存在着计算时间长、消耗资源多的问题.为了简化计算,提出了一种基于分层介质波导理论的简化人体通信理论模型.由于在理论模型和数值模型的衰减常数计算中均发现五层、四层和三层模型的结果一致,而二层模型的结果与其他模型相差较大.这从理论和实验两方面证明了三层模型在计算精度和效率方面取得了平衡,可作为简化人体通信理论模型使用.该简化模型在保持与原有五层模型相同计算精度水平的同时,计算时间为原模型的0.216倍,将计算效率提高了5倍,可用于对人体通信传输机制进行快速估计.

A Simplified Theoretical Model of Human Body Communication Based on Surface Waveguide

The calculation of the former 5 layers stratified media theoretical model of HBC (Human Body Communication) takes too much calculation resource and time. To improve this condition, a simplified theoretical model of HBC based on the theory of waveguide on stratified media was proposed. According to the calculation results of theoretical and numerical models, attenuation constants in 5, 4 and 3 layers are consistent with each other, which is far from the results of 2 layers model. In conclusion, the model of 3 layers has been proved to maintain a balance between precision and efficiency in both theoretical and numerical approaches and can be used as the simplified theoretical model of HBC. The calculation time of the simplified theoretical model is just 0.215 times of the former 5 layers model without losing accuracy, which improves the efficiency of calculation by nearly 5 times. The simplified theoretical model is useful for the fast evaluation of the propagation mechanism of HBC signal.