Parallel decoding method and system for multi-tag signals in backscattering protocol

Abstract

The invention discloses a parallel decoding method and a parallel decoding system for multi-tag signals in a backscattering protocol. The parallel decoding method comprises the steps of: acquiring anIQ domain signal sequence and clustering sampling points to obtain a plurality of clusters, and identifying all neighbor clusters of each cluster according to a transition probability between arbitrary two clusters; acquiring layers of the clusters according to all the acquired clusters and all the neighbor clusters of each cluster; determining level combinations corresponding to each layer of theclusters; and identifying a level combination sequence corresponding to the IQ domain signal sequence according to a cluster to which each signal belongs, decomposing the level combination sequence to obtain a level transmission sequence corresponding to each tag, and completing the decoding of each tag. The parallel decoding method and the parallel decoding system realize the decoding of a plurality of collision tags in a dynamic environment, and are very suitable for a highly dynamic and highly unstable backward scattering system in practical application. Since the parallel decoding methodand the parallel decoding system do not depend on stability of signals, the tag side does not need to make any changes, thereby reducing energy consumption of the tag side and improving the reliability and robustness of the algorithm.

Description

technical field [0001] The invention relates to the technical field of the Internet of Things, in particular to a method and system for parallel decoding of multi-label signals in a backscatter protocol, which realizes parallel decoding of multiple RFID labels under the condition of unstable signal transmission. This technology is suitable for multi-target positioning applications in large warehouses, shelves or wireless sensor networks that need to read multiple RFID tag signals at the same time. Background technique [0002] With the rapid development of the Internet of Things in recent years, radio frequency identification, as a key technology for the development of the Internet of Things, has attracted great attention from academia and industry. In a typical radio frequency identification system, the advantages of high communication efficiency and low energy consumption of backscatter technology greatly improve the application of backscatter technology in communication b...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that existing decoding methods have poor performance in parallel decoding of multi-label signals in backscatter communication, the present invention proposes a parallel signal decoding method in backscatter protocol, including the following steps:

Images