Link Budget Investigation of Ambient Backscatter Communication

Although the massive machine type communication (mMTC) has not been commercialized fully yet, there is a very attracting ambient backscatter communication system. Based on the backscatter method, the ambient backscatter communication systems use the already existing ambient RF signals such as cellular signal, FM broadcasting signal, WIFI signal, and so on. It is ultra-low power, which is necessary to realize mMTC. However, there is a disadvantage in that it is vulnerable to an interference environment because it uses an ambient RF signal. Therefore, analysis in an environment with interference is necessary. In this paper, we propose a method to analyze the link budget of an ambient backscatter communication system in an environment where interference signals are considered. We propose a method to analyze by adding a loss term that may occur in ambient backscatter, and present the calculation result.