Fragmented-adjustment channel parameter estimation implementation method for multiple receiving antennas of reader

Abstract

The invention relates to a fragmented-adjustment channel parameter estimation implementation method for multiple receiving antennas of a reader. The method includes the steps of obtaining initial channel parameters according to orthogonal training signals of multiple labels which are recognized at first, dividing received labor conflict signals into multiple segments, assuming that the channel parameters in each segment are kept unchanged, adjusting the channel parameters through recovery data and initial received signals after data recovery is conducted on a section of conflict label data so as to obtain a set of new channel coefficients used for recovery of the next section of conflict label data, and repeatedly executing the steps till all conflict data are completely processed. The method is ingenious and reasonable in concept, the corresponding channel parameters can be conveniently and accurately obtained, more reliable label recovery data can be obtained, the channel estimation reliability can be ensured, the RFID conflict recovery technology can be used for severe channel environments and can be applied to mobile environments, and the application range of RFID systems is widened.

Description

technical field [0001] The present invention relates to a method for realizing channel estimation, in particular to a method for realizing channel parameter estimation of multi-receiving antenna slice adjustment of a reader. Background technique [0002] The Internet of Things is an important part of the new generation of information technology. On the basis of the computer Internet, use radio frequency identification (Radio Frequency Identification, RFID), wireless data communication and other technologies to construct an "Internet of Things" covering everything in the world. In this network, items (commodities) can "communicate" with each other without human intervention. And RFID is a technology that can make items "speak". In the "Internet of Things" architecture, standardized and interoperable information is stored in RFID tags, and they are automatically collected to the central information system through the wireless data communication network to realize the identif...

AI Technical Summary

Problems solved by technology

Under the condition of a single receiving antenna, when the angle difference between the two tag signals is very small, the recognition effect is very poor; under the condition of multiple receiving antennas, it is required to modify the signal format when the tag replies to the Query command and add an orthogonal postpreamble field, which obviously increases the overhead of the system; when two tabs select the same postpreamle value, there is no way to separate them

[0010] At the same time, the existing method does not take into account the various complex situations of the actual channel for the processing method of the tag signal received by the reader, and is suitable for short RN16 conflict signals, but not necessarily applicable for longer tag information data

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