A detection method for parallel transmission of multi-reflection devices in a backscatter communication system
A reflective device and backscattering technology, applied in the field of communication, can solve problems such as the absence of multiple tags for parallel transmission detection, affecting the reading and writing speed of readers, and tag starvation
Active Publication Date: 2021-08-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The disadvantage of the non-deterministic anti-collision algorithm represented by the ALOHA algorithm is that it is prone to tag starvation. The disadvantage of the deterministic anti-collision algorithm represented by the binary search algorithm is that when the number of tags is large, the depth of the query tree will be very deep. , affecting the reading and writing speed of the reader
Moreover, neither the deterministic anti-collision algorithm nor the deterministic anti-collision algorithm can truly realize the parallel transmission detection of multiple tags, which limits the throughput performance of the system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0042] First, if figure 1 As shown, the backscatter communication system proposed by the present invention includes an access point (such as an RFID system reader, or an access point of other types of backscatter communication systems) and M (M≥1) reflecting devices;
[0043] Such as figure 2 As shown, all reflective devices reflect signals to the access point at the same time;
[0044] Such as image 3 As shown, each reflective device described includes:
[0045] Backscatter antenna module: used to receive and reflect the signal of the environmental access point;
[0046] Backscatter modulation module: change the load impedance of the antenna according to the information symbol to realize backscatter modulation;
[0047] Microcontroller module: used to control the communication process of the reflection device;
[0048] Signal processor modul...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of communication, and in particular relates to a detection method for parallel transmission of multiple reflection devices in a backscatter communication system. The method of the present invention is aimed at a system of one access point and multiple reflection devices, after clustering the received signals through the maximum expectation algorithm, classifying the constellation points of the received signals, and finally completing the clustering of the constellation points; and then according to different The transition information of the signal constellation point is received at the bit boundary of the reflective device, and the characteristics of the level jump at the bit boundary of the FM0 code are used to divide the clustered clusters into high Level group and low level group, and then decode the data of the reflection device according to the corresponding division method. The invention can realize the detection and decoding of the parallel transmission of a plurality of reflecting devices under the condition of not needing channel state information and pilot frequency.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a detection method for parallel transmission of multiple reflection devices in a backscatter communication system. Background technique [0002] The backscatter communication system uses the reader to generate and send a radio frequency sinusoidal carrier to the nearby backscatter device (hereinafter referred to as the reflection device) (that is, the tag) to provide energy and carry the reflection device information back to the reader. Its typical representative is RFID technology. The RFID reader sends a sinusoidal carrier wave to the tag. Part of the signal received by the tag is used for energy harvesting to meet the normal operation of the tag circuit, and the other part is used for backscattering to transmit the tag information to the reader. device. Backscatter communication technology can free tags from the shackles of batteries, solve the energy proble...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0056H04L1/0083
Inventor 梁应敞杨刚袁冬冬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA