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A power adjustment method, device and system for a motor vehicle electronic identification reading and writing device

An electronic identification and power adjustment technology, which is applied in the communication field, can solve problems such as weak baseband signal amplitude, inability to ensure received signal adjustment, and reduced reading success rate, so as to achieve the effect of improving the dynamic range

Active Publication Date: 2021-08-10
WUHAN WANJI INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current solution has the problem of low control accuracy, which easily affects the signal quality of useful signals.
For example, when there is a large interference signal entering the receiving chain, in order to ensure the dynamic range, the AGC needs to attenuate the receiving gain. At this time, the useful signal in the front stage of the demodulator is also attenuated, resulting in a weak baseband signal amplitude. In addition, when When the read-write device is under the condition of less interference, the baseband signal is prone to signal saturation, which will also affect the accurate reading of the electronic identification of the motor vehicle by the read-write device
Therefore, this method cannot ensure that the received signals of each node such as radio frequency signals, analog baseband signals, and digital baseband signals are adjusted to an appropriate level.
In the actual application process, it will lead to a certain distance of reading blind area in the electronic identification reading and writing equipment of motor vehicles, and the success rate of reading will be reduced.
[0004] Aiming at the problem that the electronic identification reading and writing equipment of motor vehicles has a reading blind area at a certain distance in the related technology, and the success rate of reading is reduced, no solution has been proposed

Method used

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  • A power adjustment method, device and system for a motor vehicle electronic identification reading and writing device
  • A power adjustment method, device and system for a motor vehicle electronic identification reading and writing device
  • A power adjustment method, device and system for a motor vehicle electronic identification reading and writing device

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Embodiment 1

[0089] The method embodiment provided in Embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, figure 1 It is a block diagram of the hardware structure of a mobile terminal of a power adjustment method for a motor vehicle electronic identification reading and writing device according to an embodiment of the present invention, as shown in figure 1 As shown, the mobile terminal 10 may include one or more ( figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned mobile terminal also A transmission device 106 for communication functions as well as input and output devices 108 may be included. Those of ordinary skill in the art can understand that, figu...

Embodiment 2

[0181] According to another embodiment of the present invention, there is also provided a power adjustment system for a motor vehicle electronic identification reading and writing device, Figure 5 It is a block diagram of a power adjustment system of a motor vehicle electronic identification reading and writing device according to an embodiment of the present invention, such as Figure 5 As shown, at least include: antenna 52, low noise amplifier 54, attenuator 56, demodulator 58, baseband processing module 510 and control unit 512, wherein,

[0182] The antenna 52 is used to receive the radio frequency signal of the motor vehicle electronic identification;

[0183] The input end of the low noise amplifier 54 is connected to the antenna 52 for amplifying the radio frequency signal;

[0184] The input end of the attenuator 56 is connected to the output end of the low noise amplifier 54 for attenuating the radio frequency signal;

[0185] The input end of the demodulator 58 i...

Embodiment 3

[0231] This embodiment also provides a power adjustment device for a motor vehicle electronic identification reading and writing device, which is used to implement the above embodiments and preferred implementation modes, and those that have already been described will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

[0232] Figure 7 It is a block diagram of a power adjustment device of a motor vehicle electronic identification reading and writing device according to an embodiment of the present invention, as shown in Figure 7 shown, including:

[0233] The receiving module 72 is used for receiving the radio frequency signal of the motor vehicle electronic identification;

[0234...

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Abstract

The present invention provides a power adjustment method, device and system of a motor vehicle electronic identification reading and writing device, wherein the method includes: receiving a radio frequency signal of a motor vehicle electronic identification; processing the radio frequency signal to obtain a digital baseband signal; According to the digital baseband signal, the control parameters for adjusting the power of the radio frequency signal are determined; the power of the radio frequency signal is adjusted through the control parameters, therefore, it can solve the problem of a period of time in the motor vehicle electronic identification reading and writing equipment in the related art. The problem of the reading blind area of ​​the distance and the reduction of the success rate of reading can greatly improve the dynamic range of the receiving link without affecting the receiving sensitivity.

Description

technical field [0001] The present invention relates to the communication field, in particular to a power adjustment method, device and system for a motor vehicle electronic identification reading and writing device. Background technique [0002] In the communication process of high-performance motor vehicle electronic identification reading and writing equipment, in order to ensure the effective reading of weak signals, the sensitivity of the reading and writing equipment to receive signals is relatively high. When the received signal is relatively weak, in order to improve the receiving sensitivity of the read-write device, the front stage of the demodulator of the radio frequency receiving link of the read-write device usually needs to perform power amplification processing. In addition, the original baseband signal of the post-demodulator stage also needs to be compared. Large multiples of signal amplification. However, when the strength of the received radio frequency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24
Inventor 王奇武吴雷胡攀攀
Owner WUHAN WANJI INFORMATION TECH