Environment backscattering communication system based on a frequency control array radio frequency source and a communication method thereof

Abstract

The invention discloses an environment backscattering communication system based on a frequency control array radio frequency source and a communication method of the environment backscattering communication system. According to the system, a frequency control array radio frequency source is adopted to send signals, environment backscattering communication is achieved, that is, labels communicatewith readers through existing frequency control array signals in the air, channel capacity is obtained through maximum mutual information of label symbols and received signals, and the detection performance of the environment backscattering communication system is determined through a differential detection method. Compared with traditional environment backscattering communication, the frequency control array radio frequency source is used for replacing a phased array radio frequency source, and the distance of the frequency control array is fully utilized. Angle The transmission rate of thelabel and the reader and the bit error rate performance are improved through the characteristic of the time-dependent beam. Under the condition that the number of antennas is the same as that of phased arrays, larger channel capacity and smaller system bit error rate are obtained, better detection performance is achieved, and technical support is provided for development, application and popularization of the Internet of Things in the future.

Description

technical field [0001] The invention belongs to the technical field of Internet of Things communication, and in particular relates to an environmental backscatter communication system and a communication method based on a frequency control array radio frequency source. Background technique [0002] The Internet of Things technology is one of the key technologies of the 5G communication system, and the energy problem is a major challenge of the Internet of Things technology. For some devices with expensive battery replacement and complicated maintenance operations, energy harvesting is an ideal way to keep the device working normally in the long run. Backscattering technology is a kind of energy harvesting technology, but the traditional backscattering technology is limited by the short communication distance and requires a special radio frequency signal source. The new backscattering technology - ambient backscatter (ambient backscatter) technology solves the problem this p...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the environmental backscatter communication system and its communication method based on the frequency control array radio frequency source provided by the present invention solve the problems of small channel capacity and low detection performance in the traditional environmental backscatter communication system

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