CN109714816B

CN109714816B - Power adjustment method, device and system for motor vehicle electronic identification read-write equipment

Info

Publication number: CN109714816B
Application number: CN201811574934.0A
Authority: CN
Inventors: 王奇武; 吴雷; 胡攀攀
Original assignee: Wuhan Wanji Information Technology Co Ltd
Current assignee: Wuhan Wanji Information Technology Co Ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2021-08-10
Anticipated expiration: 2038-12-21
Also published as: CN109714816A

Abstract

The invention provides a power adjustment method, a device and a system for an electronic identification read-write device of a motor vehicle, wherein the method comprises the following steps: receiving radio frequency signals of the electronic identification of the motor vehicle; processing the radio frequency signal to obtain a digital baseband signal; determining a control parameter for adjusting the power of the radio frequency signal according to the digital baseband signal; the power of the radio frequency signal is adjusted through the control parameter, so that the problems that the reading success rate is reduced due to the fact that a distance of reading blind areas occur to the electronic identification reading and writing equipment of the motor vehicle in the related technology can be solved, and the dynamic range of a receiving link can be greatly improved under the condition that the receiving sensitivity is not influenced.

Description

Power adjustment method, device and system for motor vehicle electronic identification read-write equipment

Technical Field

The invention relates to the field of communication, in particular to a power adjustment method, a device and a system for electronic identification read-write equipment of a motor vehicle.

Background

In the communication process of the high-performance motor vehicle electronic identification read-write equipment, in order to ensure effective reading of weak signals, the requirement on the sensitivity of the read-write equipment for receiving signals is high. When the received signal is weak, in order to improve the receiving sensitivity of the read-write device, the front stage of the radio frequency receiving link demodulator of the read-write device usually needs to perform power amplification processing, and in addition, the original baseband signal of the rear stage of the demodulator also needs to perform signal amplification of a larger multiple. However, when the received rf signal strength is large or a strong interference signal is mixed, the receiving link is easily saturated, and linear distortion is generated; in addition, when the original baseband signal demodulated by the demodulator is large, the saturation distortion of the signal can be caused by the large baseband amplification factor, and the reading success rate of the motor vehicle electronic identification reading and writing equipment is finally influenced.

In the design process of the read-write equipment in the existing scheme, the read-write equipment is generally ensured to have a larger receiving dynamic range by adding AGC (automatic gain control) on a radio frequency link of a receiver. However, the current scheme has the problem of low control precision and is easy to influence the signal quality of a useful signal. For example, when a large interference signal enters a receiving link, in order to ensure a dynamic range, AGC needs to attenuate a receiving gain, and a useful signal at a front stage of a demodulator is also attenuated at the moment, so that an amplitude of a baseband signal is weak. Therefore, this method cannot ensure that the received signals of the respective nodes, such as the radio frequency signal, the analog baseband signal, and the digital baseband signal, are all adjusted to an appropriate level. In the practical application process, the electronic identification reading and writing equipment of the motor vehicle can generate a reading blind area at a certain distance, and the reading success rate is reduced.

Aiming at the problems that the reading blind area at a distance occurs in the electronic identification reading and writing equipment of the motor vehicle in the related technology, and the reading success rate is reduced, no solution is provided.

Disclosure of Invention

The embodiment of the invention provides a power adjustment method, a device and a system for an electronic identification reading and writing device of a motor vehicle, which at least solve the problem that the electronic identification reading and writing device of the motor vehicle in the related technology has a reading blind area at a distance and the reading success rate is reduced.

According to an embodiment of the invention, there is provided a power adjustment method for an electronic identification reading and writing device of a motor vehicle, including:

receiving radio frequency signals of the electronic identification of the motor vehicle;

processing the radio frequency signal to obtain a digital baseband signal;

determining a control parameter for adjusting the power of the radio frequency signal according to the digital baseband signal;

and adjusting the power of the radio frequency signal through the control parameter.

Optionally, the processing the radio frequency signal to obtain a digital baseband signal includes:

acquiring the signal intensity of the radio frequency signal;

respectively amplifying, attenuating and demodulating the radio frequency signals to obtain analog baseband signals;

and respectively filtering and amplifying the analog baseband signals, and then obtaining the digital baseband signals through analog-to-digital conversion.

Optionally, determining a control parameter for performing power control on the radio frequency signal according to the digital baseband signal includes:

acquiring the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value;

if so, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal;

under the condition that the judgment result is negative, when the signal intensity of the radio-frequency signal is greater than a second signal intensity threshold value, determining a second control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude value of the baseband background noise, wherein the second signal intensity threshold value is smaller than the first signal intensity threshold value, and the second control parameter comprises a first amplification factor for amplifying the analog baseband signal;

and when the signal intensity of the radio-frequency signal is smaller than or equal to the second signal intensity threshold, determining a third control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise, wherein the third control parameter comprises a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal.

Optionally, determining a first control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband background noise includes:

determining interference intensity information of the radio frequency signal according to the amplitude of the baseband background noise;

and generating the first control parameter according to the interference intensity information.

Optionally, determining a second control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband background noise includes:

and generating the second control parameter according to the interference intensity information and the amplitude of the baseband signal.

Optionally, the generating the second control parameter according to the interference strength information and the amplitude of the baseband signal includes:

calculating a signal quality coefficient corresponding to the digital baseband signal according to the interference intensity information and the amplitude of the baseband signal;

and determining the second control parameter corresponding to the signal quality coefficient corresponding to the digital baseband signal according to a mapping relation between a prestored signal quality coefficient and an amplification factor for amplifying the analog baseband signal.

Optionally, determining a third control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband background noise includes:

calculating a signal quality coefficient corresponding to the digital baseband signal according to the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

and generating the third control parameter corresponding to the signal quality coefficient corresponding to the digital baseband signal according to a mapping relation between a prestored signal quality coefficient and a decay multiple for attenuating the radio frequency signal and an amplification multiple for amplifying the analog baseband signal.

According to another embodiment of the present invention, there is provided a power adjustment device for an electronic identification reading and writing device of a motor vehicle, including:

the receiving module is used for receiving the radio frequency signal of the electronic identification of the motor vehicle;

the processing module is used for processing the radio frequency signal to obtain a digital baseband signal;

a determining module, configured to determine a control parameter for performing power adjustment on the radio frequency signal according to the digital baseband signal;

and the adjusting module is used for adjusting the power of the radio frequency signal through the control parameter.

Optionally, the processing module is further used for

Acquiring the signal intensity of the radio frequency signal;

Optionally, the determining module includes:

the acquisition unit is used for acquiring the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

the judging unit is used for judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value or not;

a first determining unit, configured to determine, when a determination result is yes, a first control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband background noise, where the first control parameter includes a first attenuation multiple for attenuating the radio frequency signal;

a second determining unit, configured to determine, when the determination result is negative, a second control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the baseband background noise when the signal strength of the radio-frequency signal is greater than a second signal strength threshold, where the second signal strength threshold is smaller than the first signal strength threshold, and the second control parameter includes a first amplification factor for amplifying the analog baseband signal;

a third determining unit, configured to determine a third control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise when the signal strength of the radio-frequency signal is less than or equal to the second signal strength threshold, where the third control parameter includes a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal.

Optionally, the first determining unit is further configured to

Optionally, the second determining unit is further configured to

Optionally, the third determining unit is further configured to

According to another embodiment of the present invention, there is provided a power adjustment system for an electronic identification reading and writing device of a motor vehicle, including at least: an antenna, the low noise amplifier, a power detector, a low noise amplifier, an attenuator, a demodulator, a baseband processing module and a control unit, wherein,

the antenna is used for receiving radio frequency signals of the electronic identification of the bullet train;

the input end of the low-noise amplifier is connected with the antenna and used for amplifying the radio-frequency signal;

the input end of the attenuator is connected with the output end of the low-noise amplifier and is used for carrying out attenuation processing on the radio-frequency signal;

the input end of the demodulator is connected with the output end of the attenuator and is used for demodulating the radio-frequency signal after attenuation processing to obtain an analog baseband signal;

the input end of the baseband processing module is connected with the output end of the demodulator and is used for filtering and amplifying the analog baseband signal and then obtaining a digital baseband signal through analog-to-digital conversion;

the input end of the control unit is connected with the output end of the baseband processing module and is used for determining a control parameter for adjusting the power of the radio-frequency signal according to the digital baseband signal and adjusting the power of the radio-frequency signal through the control parameter.

Optionally, the control unit is further configured to obtain an amplitude of the digital baseband signal and an amplitude of the baseband noise; under the condition that the signal intensity of the radio-frequency signal is greater than a first signal intensity threshold value, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal; sending a first control signal to the attenuator;

determining a second control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the baseband background noise when the signal strength of the radio-frequency signal is less than or equal to the first signal strength threshold and is greater than a second signal strength threshold, wherein the second signal strength threshold is less than the first signal strength threshold, and the second control parameter comprises a first amplification factor for amplifying the analog baseband signal; sending a second control signal to the baseband processing module;

determining a third control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise when the signal strength of the radio-frequency signal is less than or equal to the second signal strength threshold, wherein the third control parameter includes a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal; sending a third control signal to the attenuator and the baseband processing module;

the attenuator is further used for performing attenuation processing on the radio-frequency signal according to the first attenuation multiple; or, performing attenuation processing on the radio frequency signal according to the second attenuation multiple;

the baseband processing module is further configured to amplify the analog baseband signal according to the first amplification factor; or, the analog baseband signal is amplified according to the second amplification factor.

Optionally, the attenuator is a digital attenuator or a voltage-controlled attenuator; and/or the presence of a gas in the gas,

the baseband processing module comprises a pre-amplifying circuit, a high-pass filter circuit, a low-pass filter circuit and a program-controlled amplifying circuit.

According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.

By the invention, the radio frequency signal of the electronic identification of the motor car is received; processing the radio frequency signal to obtain a digital baseband signal; determining a control parameter for adjusting the power of the radio frequency signal according to the digital baseband signal; the power of the radio frequency signal is adjusted through the control parameter, so that the problems that the reading success rate is reduced due to the fact that a distance of reading blind areas occur to the electronic identification reading and writing equipment of the motor vehicle in the related technology can be solved, and the dynamic range of a receiving link can be greatly improved under the condition that the receiving sensitivity is not influenced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a block diagram of a hardware structure of a mobile terminal of a power adjustment method for an electronic identification read-write device of a motor vehicle according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for adjusting power of an electronic identification reading and writing device of a motor vehicle according to an embodiment of the invention;

FIG. 3 is a first flowchart of a method for adaptively adjusting the receiving power of an electronic identification reading and writing device of a motor vehicle according to an embodiment of the present invention;

FIG. 4 is a second flowchart of a method for adaptively adjusting the receiving power of an electronic tag reader/writer device of a motor vehicle according to an embodiment of the present invention;

FIG. 5 is a block diagram of a power regulation system for an automotive electronic identification reading and writing device in accordance with an embodiment of the present invention;

FIG. 6 is a block diagram of a power regulation system for an automotive electronic identification reading and writing device in accordance with a preferred embodiment of the present invention;

FIG. 7 is a block diagram of a power adjustment mechanism for an electronic identification reading and writing device of a motor vehicle, according to an embodiment of the present invention;

fig. 8 is a block diagram of a power adjustment apparatus of an electronic identification reading and writing device for a motor vehicle according to a preferred embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking a mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of a mobile terminal of a power adjustment method for an automotive electronic identification read-write device according to an embodiment of the present invention, as shown in fig. 1, a mobile terminal 10 may include one or more processors 102 (only one is shown in fig. 1) (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), and a memory 104 for storing data, and optionally, the mobile terminal may further include a transmission device 106 for a communication function and an input/output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to the message receiving method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.

In this embodiment, a power adjustment method for a motor vehicle electronic identifier read-write device operating in the mobile terminal or the network architecture is provided, and fig. 2 is a flowchart of the power adjustment method for the motor vehicle electronic identifier read-write device according to the embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:

step S202, receiving radio frequency signals of the electronic identification of the motor car;

step S204, processing the radio frequency signal to obtain a digital baseband signal;

step S206, determining control parameters for adjusting the power of the radio frequency signal according to the digital baseband signal;

and step S208, adjusting the power of the radio frequency signal through the control parameter.

Receiving radio frequency signals of the electronic identification of the motor car through steps S202 to S208; processing the radio frequency signal to obtain a digital baseband signal; determining a control parameter for adjusting the power of the radio frequency signal according to the digital baseband signal; the power of the radio frequency signal is adjusted through the control parameter, so that the problems that the reading success rate is reduced due to the fact that a distance of reading blind areas occur to the electronic identification reading and writing equipment of the motor vehicle in the related technology can be solved, and the dynamic range of a receiving link can be greatly improved under the condition that the receiving sensitivity is not influenced.

In an embodiment of the present invention, the step S204 may specifically include:

s2401, acquiring the signal intensity of the radio frequency signal;

s2402, amplifying, attenuating and demodulating the radio frequency signals respectively to obtain analog baseband signals;

s2403, after filtering and amplifying the analog baseband signals respectively, obtaining the digital baseband signals through analog-to-digital conversion.

In an embodiment of the present invention, the step S206 may specifically include:

s2061, obtaining the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

s2062, judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value or not;

s2063, under the condition that the judgment result is yes, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal;

s2064, if the determination result is negative, determining a second control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband noise when the signal strength of the radio frequency signal is greater than a second signal strength threshold, where the second signal strength threshold is smaller than the first signal strength threshold, and the second control parameter includes a first amplification factor for amplifying the analog baseband signal;

s2065, when the signal strength of the radio frequency signal is less than or equal to the second signal strength threshold, determining a third control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise, where the third control parameter includes a second attenuation factor for attenuating the radio frequency signal and a second amplification factor for amplifying the analog baseband signal.

Further, the step S2063 may specifically include:

Further, the step S2064 may specifically include:

generating the second control parameter according to the interference intensity information and the amplitude of the baseband signal; further may include:

Further, the step S2065 may specifically include:

The following provides a detailed description of embodiments of the invention.

In the embodiment of the invention, the receiving power of the electronic identification reading and writing equipment of the motor vehicle is self-adaptively adjusted, and the power value of the radio frequency signal and the amplification factor of the baseband processing module 510 can be automatically adjusted in real time according to the intensity of the received radio frequency signal, the amplitude of the baseband signal and the amplitude of the baseband noise. Under the condition that receiving sensitivity is not influenced, the dynamic range of a receiving link is greatly improved, and the problem of a reading blind area in an actual application scene is solved, and the method comprises the following steps:

acquiring the signal intensity of a received radio frequency signal, acquiring a digital baseband signal according to the radio frequency signal, and acquiring the amplitude of the digital baseband signal and the amplitude of baseband noise;

specifically, the motor vehicle electronic identification read-write equipment receives a radio frequency signal returned by the motor vehicle electronic identification; the power detector determines the signal intensity of the radio frequency signal; the radio frequency signal is amplified, attenuated and demodulated to become a receiving analog baseband signal; the received analog baseband signal is amplified and filtered and then converted into a digital baseband signal by the ADC.

Determining a received signal control parameter based on the signal strength of the radio frequency signal, the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

the self-adaptive adjustment of the receiving power of the motor vehicle electronic identification read-write equipment is realized by receiving signal control parameters.

If the signal intensity of the radio frequency signal is higher than a first signal intensity threshold value, judging the interference intensity information of the radio frequency signal according to the amplitude of the baseband background noise, and generating a first control parameter corresponding to the radio frequency signal intensity according to the interference intensity information, wherein the first control parameter is used for controlling the attenuation of the receiving link power of the motor vehicle electronic identification read-write equipment;

after the first control parameter takes effect, repeating the judging and adjusting processes until the signal intensity of the radio frequency signal is not higher than a first signal intensity threshold value.

If the signal strength of the radio frequency signal is not higher than a first signal strength threshold value, judging whether the signal strength of the radio frequency signal is higher than a second signal strength threshold value, wherein the second signal strength threshold value is lower than the first signal strength threshold value;

and if the signal intensity of the radio-frequency signal is higher than a second signal intensity threshold, judging the interference intensity information of the radio-frequency signal according to the amplitude of the baseband background noise, and generating a second control parameter corresponding to the radio-frequency signal intensity according to the interference intensity information and the amplitude of the baseband signal.

The method of generating the second control parameter includes,

calculating a corresponding signal quality coefficient according to the interference intensity information and the amplitude of the baseband signal;

and inquiring a mapping relation between a preset signal quality coefficient and a receiving link control strategy to generate a second control parameter, wherein the second control parameter is used for controlling the motor vehicle electronic identification read-write equipment to adjust the amplification factor of the baseband processing module.

And if the signal strength of the radio-frequency signal is not higher than a second signal strength threshold value, generating a third control parameter corresponding to the radio-frequency signal strength. The first control parameter is used for controlling the attenuation of the power of the receiving link of the electronic identification reading and writing equipment of the motor vehicle;

after the third control parameter takes effect, repeating the judging and adjusting process until the signal strength of the radio frequency signal is not lower than the second signal strength threshold value.

The first control parameter, the second control parameter, and the third control parameter are generated by a control unit.

The self-adaptive adjustment of the receiving power of the motor vehicle electronic identification read-write equipment is adopted, the intensity of the radio-frequency signal received by a receiving link can be monitored in real time, the intensity of the radio-frequency signal and the baseband amplification factor are adjusted in real time according to different conditions of the amplitude of the baseband signal and the amplitude of the background noise, and the received signals of each node such as the radio-frequency signal, the analog baseband signal and the digital baseband signal are adjusted to proper levels. Under the condition of not influencing the receiving sensitivity of the motor vehicle electronic identification reading and writing equipment, the dynamic range of a receiving link is improved as much as possible, the influence of a reading blind area on the reading and writing success rate of the reading and writing equipment is eliminated, and the normal communication between the motor vehicle electronic identification reading and writing equipment and the motor vehicle electronic identification under different working environments in practical application is ensured.

Fig. 3 is a first flowchart of a method for adaptively adjusting the received power of an electronic identification read-write device of a motor vehicle according to an embodiment of the present invention, as shown in fig. 3, including:

step S302, acquiring the signal intensity of the received radio frequency signal, the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

specifically, the digital baseband signal is generated as follows:

the motor vehicle electronic identification read-write equipment receives a radio frequency signal returned by the motor vehicle electronic identification;

the power detector determines the signal intensity of the radio frequency signal;

the radio frequency signal is amplified, attenuated and demodulated to become a receiving analog baseband signal;

the received analog baseband signal is amplified and filtered and then converted into a digital baseband signal by the ADC.

Step S304, determining control parameters of the received signals based on the signal intensity of the radio frequency signals, the amplitude of the digital baseband signals and/or the amplitude of the baseband background noise;

specifically, if the signal strength of the radio frequency signal is higher than a first signal strength threshold, a first control parameter corresponding to the received radio frequency signal strength is generated.

And if the signal strength of the radio frequency signal is not higher than a first signal strength threshold value, judging whether the signal strength of the radio frequency signal is higher than a second signal strength threshold value, wherein the second signal strength threshold value is lower than the first signal strength threshold value.

If the signal intensity of the radio frequency signal is higher than a second signal intensity threshold value, generating a corresponding second control parameter according to the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

and if the signal strength of the radio-frequency signal is not higher than a second signal strength threshold value, generating a third control parameter corresponding to the radio-frequency signal strength.

And S306, realizing the self-adaptive adjustment of the receiving power of the electronic identification reading and writing equipment of the motor vehicle through the received signal control parameter.

Specifically, the first control parameter, the second control parameter, and the third control parameter are generated by a control unit.

The first control parameter is used for controlling the attenuation of the power of the receiving link of the electronic identification reading and writing equipment of the motor vehicle;

the method for generating the second control parameter specifically includes:

calculating a corresponding signal quality coefficient according to the amplitude of the baseband signal and the amplitude of the baseband background noise;

The method of generating the third control parameter includes,

and inquiring the mapping relation among the signal intensity and the signal quality coefficient of a preset radio frequency signal and a receiving link control strategy to generate a third control parameter, wherein the third control parameter is used for controlling the attenuation of the receiving link power of the motor vehicle electronic identification read-write equipment and adjusting the amplification factor of the baseband processing module by the motor vehicle electronic identification read-write equipment.

Fig. 4 is a second flowchart of a method for adaptively adjusting the received power of an electronic identification read-write device of a motor vehicle according to an embodiment of the present invention, as shown in fig. 4, including:

s401, acquiring the signal intensity of a received radio frequency signal, processing the radio frequency signal to obtain a digital baseband signal, and acquiring the amplitude of the digital baseband signal and the amplitude of baseband background noise;

s402: judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value, if so, executing a step S403, and if not, executing a step S405;

s403, generating a first control parameter corresponding to the signal intensity of the radio frequency signal;

s404, controlling the electronic identification reading and writing equipment of the motor vehicle to adjust the power of the receiving link;

s405, judging whether the signal intensity of the radio frequency signal is greater than a second signal intensity threshold value, if so, executing S406, and if not, executing step S408;

s406, generating a corresponding second control parameter according to the amplitude of the digital baseband signal and the amplitude of the baseband background noise;

s407, controlling the electronic identification reading and writing equipment of the motor vehicle to adjust the amplification factor of the baseband processing module;

s408, generating a third control parameter corresponding to the signal intensity of the radio frequency signal;

and S409, controlling the motor vehicle electronic identification read-write equipment to adjust the power of the receiving link and the amplification factor of the baseband processing module.

Specifically, if the signal strength of the radio frequency signal is higher than a first signal strength threshold, a first control parameter corresponding to the radio frequency signal strength is generated.

the method for generating the second control parameter may specifically include:

The method of generating the third control parameter may include:

And after the motor vehicle electronic identification read-write equipment is adjusted through the generated control parameters every time, continuously returning to repeatedly judge whether the received power is adjusted to the target range, and if the received power is not adjusted to the target range, repeatedly performing one-time adjustment to ensure the accuracy of power adjustment and eliminate error adjustment caused by factors such as interference.

Example 2

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

the antenna 52 is used for receiving radio frequency signals of the electronic identification of the motor vehicle;

the input end of the low noise amplifier 54 is connected to the antenna 52, and is configured to amplify the radio frequency signal;

the input end of the attenuator 56 is connected to the output end of the low noise amplifier 54, and is used for performing attenuation processing on the radio frequency signal;

the input end of the demodulator 58 is connected to the output end of the attenuator 56, and is configured to demodulate the radio-frequency signal after the attenuation processing, so as to obtain an analog baseband signal;

the input end of the baseband processing module 510 is connected to the output end of the demodulator 58, and is configured to filter and amplify the analog baseband signal, and then obtain a digital baseband signal through analog-to-digital conversion;

the input end of the control unit 512 is connected to the output end of the baseband processing module 510, and is configured to determine a control parameter for performing power adjustment on the radio frequency signal according to the digital baseband signal, and adjust the power of the radio frequency signal according to the control parameter.

Optionally, the control unit 512 is further configured to obtain an amplitude of the digital baseband signal and an amplitude of the baseband noise; under the condition that the signal intensity of the radio-frequency signal is greater than a first signal intensity threshold value, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal; sending a first control signal to the attenuator 56;

determining a second control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the baseband background noise when the signal strength of the radio-frequency signal is less than or equal to the first signal strength threshold and is greater than a second signal strength threshold, wherein the second signal strength threshold is less than the first signal strength threshold, and the second control parameter comprises a first amplification factor for amplifying the analog baseband signal; sending a second control signal to the baseband processing module 510;

determining a third control parameter corresponding to the signal strength of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise when the signal strength of the radio-frequency signal is less than or equal to the second signal strength threshold, wherein the third control parameter includes a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal; sending a third control signal to the attenuator 56 and the baseband processing module 510;

the attenuator 56 is further configured to perform attenuation processing on the radio frequency signal according to the first attenuation multiple; or, performing attenuation processing on the radio frequency signal according to the second attenuation multiple;

the baseband processing module 510 is further configured to amplify the analog baseband signal according to the first amplification factor; or, the analog baseband signal is amplified according to the second amplification factor.

Optionally, the attenuator 56 is a digital attenuator or a voltage-controlled attenuator; and/or the presence of a gas in the gas,

the baseband processing module 510 includes a pre-amplifying circuit, a high-pass filter circuit, a low-pass filter circuit, and a programmable amplifying circuit.

The following provides a detailed description of embodiments of the invention.

Fig. 6 is a block diagram of a power adjustment system of an automotive electronic identification reading and writing device according to a preferred embodiment of the present invention, as shown in fig. 6, including: antenna 52, rf switch 62, circulator 64, coupler 66, power detector 68, low noise amplifier 54, attenuator 56, demodulator 58, baseband processing module 510 and control unit 512, wherein,

the antenna 52 is used for receiving radio frequency signals returned by the electronic identification of the motor vehicle through a wireless channel;

the radio frequency switch 62 is connected to the antenna 52 and is configured to selectively receive a radio frequency signal corresponding to the antenna 52;

the circulator 64 is connected with the radio frequency switch 62 and is used for realizing the isolation of the radio frequency transmitting signal and the received radio frequency signal and reducing the leakage of the radio frequency transmitting signal to a receiving link;

the input end of the coupler 66 is connected to the circulator 64, and is configured to couple a path of transmission signal to cancel the transmission signal leaked from the circulator 64 to the radio frequency signal;

the power detector 68 is connected to the isolated end of the coupler 66, and is configured to detect the power of the radio frequency signal at the receiving end via the coupler 66;

the input end of the low noise amplifier 54 is connected with the output end of the coupler 66, and is used for realizing the amplification of the radio frequency signal;

the input end of the attenuator 56 is connected with the output end of the low noise amplifier 54, and is used for realizing attenuation of radio frequency signals;

the input end of the demodulator 58 is connected to the output end of the attenuator 56, and is configured to demodulate the radio frequency signal to obtain an original baseband signal (i.e., the analog baseband signal);

the input end of the baseband processing module 510 is connected to the output end of the demodulator 58, and is configured to filter and amplify the original baseband signal, convert the original baseband signal into a digital baseband signal, and send the digital baseband signal to the control unit 512;

the input end of the control unit 512 is connected to the output end of the baseband processing module 510, and is configured to receive the digital baseband signal processed by the baseband processing module 510, and generate a corresponding control parameter according to the signal strength.

The control unit 512 generates a first control parameter, generates a corresponding control signal, and transmits the control signal to the attenuator 56 to control the attenuation value of the attenuator 56.

The control unit 512 generates a second control parameter, generates a corresponding control signal, and sends the control signal to the baseband processing module 510 to control the amplification factor of the baseband processing module 510.

The control unit 512 generates a third control parameter, generates a corresponding control signal, and sends the control signal to the attenuator 56 and the baseband processing module 510, so as to control the attenuation value of the attenuator 56 and the amplification factor of the baseband processing module 510.

The attenuator 56 is any one of a digital attenuator 56 and a voltage-controlled attenuator 56, the attenuation range is greater than 20dB, and the step of the attenuator 56 is less than 0.5 dB.

The baseband processing module 510 includes a pre-amplifying circuit, a high-pass filter circuit, a low-pass filter circuit, and a program-controlled amplifying circuit;

the programmable amplifying circuit adjusts the amplification factor of the circuit according to the control signal provided by the control unit 512, so as to realize gain control of the baseband signal.

The embodiment provides a receiving power adaptive adjusting device for an electronic identification reading and writing device of a motor vehicle, as shown in fig. 6, including: an antenna 52, a radio frequency switch 62, a circulator 64, a coupler 66, a power detector 68, a low noise amplifier 54, an attenuator 56, a demodulator 58, a baseband processing module 510 and a control unit 512, each of which is described below.

the input end of the low noise amplifier 54 is connected with the output end of the coupler 66, and is used for realizing power amplification of radio frequency signals;

the input end of the demodulator 58 is connected to the output end of the attenuator 56, and is configured to demodulate the radio frequency signal to obtain an original baseband signal;

The attenuator 56 is any one of a digital attenuator and a voltage-controlled attenuator, the attenuation range is greater than 20dB, and the step of the attenuator is less than 0.5 dB.

Example 3

In this embodiment, a power adjustment device for an electronic identifier reading/writing device of a motor vehicle is further provided, and the power adjustment device is used to implement the foregoing embodiments and preferred embodiments, which have already been described and will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 7 is a block diagram of a power adjustment apparatus of an electronic tag reading/writing device of a motor vehicle according to an embodiment of the present invention, as shown in fig. 7, including:

the receiving module 72 is used for receiving radio frequency signals of the electronic identification of the motor car;

a processing module 74, configured to process the radio frequency signal to obtain a digital baseband signal;

a determining module 76, configured to determine a control parameter for performing power adjustment on the radio frequency signal according to the digital baseband signal;

and an adjusting module 78, configured to adjust the power of the radio frequency signal according to the control parameter.

Optionally, the processing module 74 is further configured to

Acquiring the signal intensity of the radio frequency signal;

Fig. 8 is a block diagram of a power adjustment device of an electronic identification reading and writing device of a motor vehicle according to a preferred embodiment of the present invention, and as shown in fig. 8, the determining module 76 includes:

an obtaining unit 82, configured to obtain an amplitude of the digital baseband signal and an amplitude of the baseband noise;

a determining unit 84, configured to determine whether the signal strength of the radio frequency signal is greater than a first signal strength threshold;

a first determining unit 86, configured to determine, when the determination result is yes, a first control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband background noise, where the first control parameter includes a first attenuation multiple for attenuating the radio frequency signal;

a second determining unit 88, configured to determine, when the signal strength of the radio frequency signal is greater than a second signal strength threshold, a second control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the baseband background noise, where the second signal strength threshold is smaller than the first signal strength threshold, and the second control parameter includes a first amplification factor for amplifying the analog baseband signal;

a third determining unit 810, configured to determine a third control parameter corresponding to the signal strength of the radio frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise when the signal strength of the radio frequency signal is less than or equal to the second signal strength threshold, where the third control parameter includes a second attenuation factor for attenuating the radio frequency signal and a second amplification factor for amplifying the analog baseband signal.

Optionally, the first determining unit 86 is further configured to

Optionally, the second determining unit 88 is further configured to

Optionally, the third determining unit 810 is further configured to

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.

Example 4

Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.

Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:

s1, receiving radio frequency signals of the electronic identification of the motor vehicle;

s2, processing the radio frequency signal to obtain a digital baseband signal;

s3, determining a control parameter for adjusting the power of the radio frequency signal according to the digital baseband signal;

and S4, adjusting the power of the radio frequency signal through the control parameter.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Example 5

Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.

Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.

Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:

s2, processing the radio frequency signal to obtain a digital baseband signal;

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power regulation method for an electronic identification read-write device of a motor vehicle is characterized by comprising the following steps:

processing the radio frequency signal to obtain a digital baseband signal;

adjusting the power of the radio frequency signal through the control parameter;

determining control parameters for power adjustment of the radio frequency signal according to the digital baseband signal comprises: acquiring the amplitude of the digital baseband signal and the amplitude of the baseband background noise; judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value; if so, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal; under the condition that the judgment result is negative, when the signal intensity of the radio-frequency signal is greater than a second signal intensity threshold value, determining a second control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude value of the baseband background noise, wherein the second signal intensity threshold value is smaller than the first signal intensity threshold value, the second control parameter comprises a first amplification factor for amplifying an analog baseband signal, and the analog baseband signal is obtained based on the radio-frequency signal; and when the signal intensity of the radio-frequency signal is smaller than or equal to the second signal intensity threshold, determining a third control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise, wherein the third control parameter comprises a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal.

2. The method of claim 1, wherein processing the radio frequency signal to obtain a digital baseband signal comprises:

acquiring the signal intensity of the radio frequency signal;

respectively amplifying, attenuating and demodulating the radio frequency signals to obtain the analog baseband signals;

3. The method of claim 1, wherein determining a first control parameter corresponding to the signal strength of the radio frequency signal based on the amplitude of the baseband noise floor comprises:

4. The method of claim 1, wherein determining a second control parameter corresponding to the signal strength of the radio frequency signal based on the amplitude of the baseband noise floor comprises:

5. The method of claim 4, wherein generating the second control parameter according to the interference strength information and the amplitude of the baseband signal comprises:

6. The method of claim 1, wherein determining a third control parameter corresponding to the signal strength of the radio frequency signal based on the magnitude of the digital baseband signal and the magnitude of the baseband noise comprises:

7. A power adjusting device of a motor vehicle electronic identification read-write device is characterized by comprising:

the adjusting module is used for adjusting the power of the radio frequency signal through the control parameter;

the determining module is configured to determine a control parameter for performing power adjustment on the radio frequency signal according to the digital baseband signal, and specifically includes: acquiring the amplitude of the digital baseband signal and the amplitude of the baseband background noise; judging whether the signal intensity of the radio frequency signal is greater than a first signal intensity threshold value; if so, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal; under the condition that the judgment result is negative, when the signal intensity of the radio-frequency signal is greater than a second signal intensity threshold value, determining a second control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude value of the baseband background noise, wherein the second signal intensity threshold value is smaller than the first signal intensity threshold value, the second control parameter comprises a first amplification factor for amplifying an analog baseband signal, and the analog baseband signal is obtained based on the radio-frequency signal; and when the signal intensity of the radio-frequency signal is smaller than or equal to the second signal intensity threshold, determining a third control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the digital baseband signal and the amplitude of the baseband noise, wherein the third control parameter comprises a second attenuation factor for attenuating the radio-frequency signal and a second amplification factor for amplifying the analog baseband signal.

8. A power regulation system for an electronic identification read-write device of a motor vehicle, comprising at least: an antenna, a power detector, a low noise amplifier, an attenuator, a demodulator, a baseband processing module and a control unit, wherein,

the input end of the control unit is connected with the output end of the baseband processing module and is used for determining a control parameter for adjusting the power of the radio-frequency signal according to the digital baseband signal and adjusting the power of the radio-frequency signal through the control parameter;

the control unit is further used for acquiring the amplitude of the digital baseband signal and the amplitude of the baseband background noise; under the condition that the signal intensity of the radio-frequency signal is greater than a first signal intensity threshold value, determining a first control parameter corresponding to the signal intensity of the radio-frequency signal according to the amplitude of the baseband background noise, wherein the first control parameter comprises a first attenuation multiple for attenuating the radio-frequency signal; sending a first control signal to the attenuator;

9. The system of claim 8,

the attenuator is a digital attenuator or a voltage-controlled attenuator; and/or the presence of a gas in the gas,

10. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 6 when executed.

11. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 6.