Information Symbol Detection Method Based on Multi-antenna Environmental Backscatter System

Abstract

The invention relates to an information symbol detection method for an environment backscattering system based on multiple antennas. The environment backscattering system comprises an ambient radio frequency signal source, an electronic tag and a reader, wherein the reader has M receiving antennas, and M is not less than 2. The method comprises the steps that 1), the ambient radio frequency signalsource transmits an environment radio frequency signal; 2), the electronic tag is mapped to a reflected or non-reflective ambient radio frequency signal according to a transmitted binary symbol, wherein the binary symbol in the electronic tag includes a known preamble symbol and a to-be-determined information symbol; 3), the M receiving antennas of the reader receive the signals, estimate the decision threshold using the preamble symbol, and use an energy detector to determine the information symbol transmitted by the electronic tag. Compared with the performance of a single-antenna detectionmethod, the performance of the method is remarkably improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an information symbol detection method based on a multi-antenna environment backscattering system. Background technique [0002] The Internet of Things is an integral part of the new generation of information technology, but due to its characteristics of large-scale deployment, issues such as equipment cost and daily battery maintenance have always been the bottleneck of the development of the Internet of Things. Thanks to the environmental backscatter communication technology, it shifts from the traditional autonomous emission communication method to the backscatter method, thereby reducing the cost, volume and power consumption of communication nodes. At the same time, using the radio frequency signal source in the surrounding environment as the energy and carrier supply of the communication node can even eliminate the battery inside the communication node. [0003] Based...

AI Technical Summary

Problems solved by technology

[0002] The Internet of Things is an integral part of the new generation of information technology, but due to its characteristics of large-scale deployment, issues such as equipment cost and daily battery maintenance have always been the bottleneck of the development of the Internet of Things

Since the reader is aimed at a single reader scenario, the bit error rate of this method is relatively high

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