Relay-assisted environmental backscatter communication method

Abstract

The invention discloses a relay-assisted environmental backscatter communication method. A relay assists a radio frequency transmitter and a backscatter communication device to communicate with respective target receivers at the same time. The backscatter communication device modulates the own information to the signal of the radio frequency transmitter, the relay decodes the information by adopting a serial interference elimination mode, forwards decoded information to respective information receivers in a non-orthogonal multiple access manner, and optimizes the performance of environment backscatter communication by optimizing the reflection coefficient of the environment backscatter communication device and a power distribution factor of the relay on the premise of ensuring the communication quality of the radio frequency communication link. Compared with a traditional decoding forwarding relay communication system, the relay-assisted environment backscatter communication method provided by the invention can obviously improve the communication performance of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a relay-assisted environment backscatter communication method. Background technique [0002] With the development of the Internet of Things, the power supply and communication problems of massive nodes need to be solved urgently. Obviously, the traditional wired power supply method is no longer suitable; regular battery replacement or battery charging is one way, but for sensors with tens of thousands of nodes This is inconvenient for the network; the power supply using solar energy is unstable, which affects the stable operation of the system. At the same time, the traditional wireless communication technology needs to send radio frequency signals, which has the problems of high power consumption and high cost. The ambient backscatter (AmbientBackscatter) technology solves these problems to a certain extent. [0003] Environmental backscatter technol...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a relay-assisted environmental backscatter communication method for the above-mentioned deficiencies in the prior art, which is used to solve the problem when backscatter radio frequency transmitters and backscatter equipment and related information receive When the communication distance between machines is long, the communication will be interrupted

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