780MHz wireless transceiver system based on IEEE802.15.4c standard

A 780mhz, standard technology, applied in transmission systems, electrical components, etc., can solve problems such as weak anti-interference ability, unreasonable design of radio frequency signals, and low transmission power

Inactive Publication Date: 2015-08-26
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0002] A fatal problem currently plaguing the IoT industry is too much interference in the same frequency band. In the past, the design of network nodes usually used the 2.4G frequency band, but due to the existence of wireless devices such as wireless USB, WIFI, Bluetooth, walkie-talkie, wireless mouse, etc. The transmission interference in this frequency band is very large, and 433MHz is currently used more, and the interference is also very large, and the anti-interference ability of these two frequency bands is weak, and the 780MHz frequency band is a specific frequency band in the 779-787MHz frequency band. The frequency band specially applied for the Chinese IEEE.802.15.4c standard is also a domestic free frequency band specially applied for the Internet of Things industry. Therefore, this frequency band has less interference. This paper uses the 780MHz frequency band to realize the communication of the wireless transceiver system
There are few 780MHz frequency radio frequency modules in the prior art, which adopt BPSK (Phase Shift Keying) modulation mode for communication, but in the prior art, due to poor matching of balanced and unbalanced circuits and unreasonable design of radio frequency signals, resulting in Bad effects of low transmission power and too short transmission distance

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  • 780MHz wireless transceiver system based on IEEE802.15.4c standard
  • 780MHz wireless transceiver system based on IEEE802.15.4c standard

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawing.

[0012] refer to figure 1 As shown, a 780MHz wireless transceiver system based on the IEEE802.15.4c standard includes a transmitting module and a receiving module. The transmitting module includes: microcontroller module, radio frequency module, digital-to-analog converter, low-pass filter, quadrature mixer, balun chip, T-type filter, antenna, and the receiving module includes: microcontroller module, radio frequency module , polyphase filter, integrated bandpass filter, analog-to-digital converter, digital baseband receiver, BBP (baseband processor), SPI (serial peripheral interface) interface.

[0013] The sensor collects industrial field data and transmits it to the microcontroller module of the sending module. After the data is analyzed and processed, it is sent to the digital transmitter (TX BBP) in the radio frequency chip through SPI (Serial Peripheral Interface) com...

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Abstract

The invention discloses a 780MHz wireless transceiver system based on IEEE802.15.4c standard. A transmitting module of the wireless transceiver system is used for transmitting data processed by a microcontroller chip to a radio frequency chip via SPI communication and then transmitting in the form of electromagnetic wave. A receiving module is used for transmitting collected data processed and analyzed by a main control chip via a serial port to an upper computer to be displayed visually. The transceiver system in this frequency band is low in interference and is mainly used for sensor network node, route and gateway in industrial internet of things site in internet of things system.

Description

technical field [0001] The present invention relates to the field of industrial wireless communication, in particular to a wireless transceiver system based on the IEEE802.15.4c standard Background technique [0002] A fatal problem currently plaguing the IoT industry is too much interference in the same frequency band. In the past, the design of network nodes usually used the 2.4G frequency band, but due to the existence of wireless devices such as wireless USB, WIFI, Bluetooth, walkie-talkie, wireless mouse, etc. The transmission interference in this frequency band is very large, and 433MHz is currently used more, and the interference is also very large, and the anti-interference ability of these two frequency bands is weak, and the 780MHz frequency band is a specific frequency band in the 779-787MHz frequency band. The frequency band specially applied for the Chinese IEEE.802.15.4c standard is also a domestic free frequency band specially applied for the Internet of Thing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40
Inventor 严冬何政王平柏桐刘丽
Owner CHONGQING UNIV OF POSTS & TELECOMM
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