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Multi-passive reflection label access system based on code division multiple access and control method

A code division multiple access and access system technology, which is applied in the code division multiple access-based multi-passive reflective label access system and control field, can solve problems such as the inability to meet the requirements of distributed solutions, and achieve the effect of improving system performance

Active Publication Date: 2019-09-27
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

Therefore, it cannot meet the requirements of distributed schemes

Method used

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  • Multi-passive reflection label access system based on code division multiple access and control method
  • Multi-passive reflection label access system based on code division multiple access and control method
  • Multi-passive reflection label access system based on code division multiple access and control method

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Embodiment

[0087] (a) First, multiple passive reflective tags are required, such as Figure 4 As shown, each tag sends different data to realize code division multiple access in backscatter communication, and uses a square wave signal to control the on-off of the antenna to realize signal reflection and spectrum shift.

[0088] (b) An excitation source ES is required, which can emit a single-tone sinusoidal signal or a WiFi signal.

[0089] (c) A receiver is needed again, which can receive the reflected signal, and the receiver processes the received data, and runs the model and algorithm of the present invention.

[0090] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, t...

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Abstract

The invention discloses a multi-passive reflection label access system based on code division multiple access and a control method. The multi-passive reflection label access system comprises a plurality of passive reflection labels, an excitation source and a receiver, wherein each passive reflection tag sends a backscattering signal of an excitation source to the receiver after sequentially carrying out frame sealing, coding and modulation on the sent data, and each code contains a unique PN sequence of the corresponding passive reflection tag; and the receiver can decode the received coded data sent by the passive reflection labels and distinguish the coded data sent by different passive reflection labels according to PN sequences obtained by decoding. The system realizes simultaneous transmission of a plurality of nodes by code division multiple access in a passive reflection communication system comprising a plurality of passive reflection tags.

Description

technical field [0001] The present invention relates to the field of passive communication, in particular to a multi-passive reflective tag access system and control method based on code division multiple access. Background technique [0002] Although traditional 802.11 wireless networks have achieved great success in providing each device with higher and higher transmission rates, the recent increasing number of IoT devices has brought new requirements and challenges to future network paradigm designs . By 2020, there are expected to be 3 billion IoT devices, a number that is growing at a rate of 20% per year. These plethora of devices will be deployed around and even on people's bodies to provide various types of perception to improve people's quality of life. Unlike traditional laptops and smartphones, which require high transfer rates, these IoT devices typically transfer data at low rates or in bursts. There are two main problems faced in this way. The first one is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/00H04W52/24
CPCH04L1/0036H04L1/1607H04W52/24
Inventor 杨盘隆李向阳宓楠浣
Owner UNIV OF SCI & TECH OF CHINA
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