Relay-assisted environmental backscatter communication method

A technology of backscattering and radio frequency communication, applied in the direction of wireless communication, radio transmission system, electrical components, etc., can solve the problems of communication interruption and long communication distance.

Active Publication Date: 2019-07-09
XI AN JIAOTONG UNIV
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  • Summary
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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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  • Relay-assisted environmental backscatter communication method
  • Relay-assisted environmental backscatter communication method
  • Relay-assisted environmental backscatter communication method

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Embodiment Construction

[0060] The present invention provides a relay-assisted environmental backscatter communication method. The relay simultaneously assists the radio frequency transmitter and the backscatter communication device to communicate with their respective target receivers, and the backscatter communication device modulates its own information to the radio frequency On the signal from the transmitter, the relay uses serial interference cancellation to decode the information, and forwards the decoded information to their respective information receivers through non-orthogonal multiple access, and ensures the radio frequency communication link Under the premise of communication quality, the performance of environmental backscatter communication is optimized by optimizing the reflection coefficient of the environmental backscatter communication equipment and the power allocation factor of the relay. Compared with the traditional decode-and-forward relay communication system, the relay-assist...

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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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/155H04W24/02H04W40/22
CPCH04B7/15507H04W24/02H04W40/22
Inventor 张超脱艳红
Owner XI AN JIAOTONG UNIV
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