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Research on the development strategy of smart Internet of things system, source "China Engineering Science"

Research on the development strategy of smart Internet of things system, source "China Engineering Science"

As an important part of the new digital infrastructure, the Internet of Things is deeply integrated with the fifth-generation mobile communication, big data, cloud computing, artificial intelligence, blockchain, digital twin and other technologies. It is profoundly changing the technology industry system and promoting the rapid development of the digital economy. The development has opened a new stage of "smart Internet of Things system" of the intelligent connection of all things.

2021-09-15

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Introduction to domestic RF chip knowledge

Introduction to domestic RF chip knowledge

Strictly speaking, domestic RF chips generally refer to chips that transmit and receive RF signals. In mobile phones, they are approximately equivalent to baseband chips. But signal transceiver and modulation and demodulation are two necessary links, so put the above two functions together into one chip, which is the baseband chip. The baseband chip is small in size and low in power consumption.

2021-09-15

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Principles of visible light communication

Principles of visible light communication

Visible light communication (VLC) is a technology that offers significant advantages over the more commonly used radio frequency (RF) in some applications. Aside from its obvious use for data transfer from one point to another, VLC has attracted a lot of attention for its ability to provide a highly accurate and secure indoor positioning system. Implementing a VLC system presents specific challenges involving system integration and power management, especially for those unfamiliar with the technology. This article will explore some applications of VLC, including the principles of the VLC positioning system, and discuss how the latest devices provide a minimal risk design path.

2021-09-15

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How TurMass™ is made

How TurMass™ is made

TurMass™ adopts the original mGFRA technology, which can be regarded as the combination of multi-channel time slot ALOHA and massive MIMO receiver. The core idea is to use frequency division multiplexing and space division multiplexing to support parallel access of a large number of users. The system is divided into multiple channels, and each user randomly selects a channel for pilot and data transmission. On each channel, the gateway uses the received pilot signal to obtain the channel estimation of each user, and then uses beamforming to demodulate the superimposed user data signals, thereby recovering the data sent by each user. The complete process of mGFRA includes signal transmission at the user end and signal processing at the gateway end: 1) The terminal randomly selects the pilot; 2) The terminal randomly selects the channel; 3) User detection and channel estimation; 4) Beamforming and signal demodulation.

2021-09-15

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