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Dual-frequency wireless multiplexing transmitting system and method

A transmission system and wireless technology, applied in transmission systems, electrical components, etc., can solve problems such as waste of resources, and achieve the effects of reducing transmission power, saving waste of resources, and reducing costs

Active Publication Date: 2022-02-11
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The prescribed frequency of civil meters in my country is 470MHz-510MHz, and there is no dedicated wireless transmitter chip supporting this frequency band, but this frequency band is used to replace the previous 433MHz frequency band, because the wireless transmitter chips of the two are very similar and special Manufacturing wireless transmitter chips in the 510MHz frequency band will cause a great waste of resources, so how to meet the needs of civilian meters by changing the communication method on the basis of existing equipment needs to be solved urgently

Method used

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  • Dual-frequency wireless multiplexing transmitting system and method
  • Dual-frequency wireless multiplexing transmitting system and method

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Embodiment 1

[0033] see figure 1 , in one embodiment of the present invention, the dual-frequency wireless multiplexing transmission system includes an up-conversion mixer 1 for receiving modulated signals and mixing them into two required frequency bands, and the up-conversion mixer 1 passes power Amplifier 3 is connected to different frequency impedance matching networks, power amplifier 3 can perform power amplification and has a power adjustment function, and different frequency impedance matching networks are used to match impedances to impedances used at different frequencies; different frequency impedance matching networks are connected to reconfigurable antennas 4; the different frequency impedance matching networks are selectively turned on through the time division controller 5, and the reconfigurable antenna 4 can work in the required two frequency bands; the up-conversion mixer 1 is also connected to provide the frequency of the local oscillator signal of the transmitting chip ...

Embodiment 2

[0040] see figure 2 , another embodiment proposes a dual-frequency wireless multiplexing transmission method, comprising the following steps:

[0041] S1. The civil meter performs long-distance communication through the 230MHz frequency band and uploads the data to the public network;

[0042] S2. Realize the wireless meter reading service through short-distance communication in the 510MHz frequency band.

[0043] In this embodiment, the long-distance communication through the 230MHz frequency band or the short-distance communication through the 510MHz frequency band are selected and realized by the reconfigurable antenna 4, and the reconfigurable antenna 4 can receive radio frequencies of different frequencies by changing the length of the antenna. Signal, the reconfigurable antenna 4 can transmit radio frequency signals in two frequency bands, and adopts frequency hopping technology to realize fast switching between the two frequency bands. The reconfigurable antenna 4 is...

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Abstract

The invention discloses a dual-frequency wireless multiplexing transmission system and method, and the system comprises an up-conversion mixer which is used for receiving a modulated signal and mixing the modulated signal to two required frequency bands, wherein the up-conversion mixer is connected with different-frequency impedance matching networks through a power amplifier, and the power amplifier can carry out the power amplification and has a power adjustment function; the different-frequency impedance matching network is used for matching impedance to impedance used by different frequencies; the different-frequency impedance matching network is connected with the reconfigurable antenna; the different-frequency impedance matching network is selectively conducted through the time division controller, and the reconfigurable antenna can work in two required frequency bands; and the up-conversion mixer is also connected with a frequency synthesizer for providing a local oscillator signal. The method comprises the steps that the civil meter performs remote communication through a 230MHz frequency band to upload data to a public network; and near field communication is carried out through a 510MHz frequency band to realize wireless meter reading service. The cost of the civil meter wireless transmitter is greatly reduced by adopting a multiplexing technology.

Description

technical field [0001] The invention belongs to the technical field of wireless transmission, and in particular relates to a dual-frequency wireless multiplexing transmission system and method. Background technique [0002] The prescribed frequency of civil meters in my country is 470MHz-510MHz, and currently there is no dedicated wireless transmitter chip supporting this frequency band, but this frequency band is used to replace the previous 433MHz frequency band, because the wireless transmitter chips of the two are very similar and special Manufacturing wireless transmitter chips in the 510MHz frequency band will cause a great waste of resources, so how to meet the needs of civilian meters by changing the communication method on the basis of existing equipment needs to be solved urgently. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide a dual-frequency wireless multiplexing tra...

Claims

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Application Information

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IPC IPC(8): H04B1/00H04B1/04
CPCH04B1/0053H04B1/04H04B1/0458H04B2001/0408H04B2001/0491Y02D30/70
Inventor 朱思成钟成路鹏程张慧孟萨出拉滕玲李健刘晗李正浩马宝娟胡悦
Owner CHINA ELECTRIC POWER RES INST