CN114650075B - Data transmitting/receiving system, data receiving apparatus, and control method thereof - Google Patents

Abstract

The present application relates to a data transceiving system, data receiving equipment and a control method thereof. The data receiving device includes: a first energy detection circuit for comparing the first gain signal with a first preset range and outputting a first energy indication signal according to the comparison result; a second energy detection circuit for converting the filtered signal Compare with the second preset range, and output a second energy indication signal according to the comparison result; the automatic gain control circuit is connected to the first energy detection circuit and the second energy detection circuit, and is used to output the second energy indication signal according to the first energy indication signal and the second energy detection circuit. The two energy indication signals and the output signal generate a first gain control signal and a second gain control signal; the first gain control signal is used to adjust the first gain, and the second gain control signal is used to adjust the second gain. The data receiving device can adjust the first gain and the second gain according to the first gain signal and the filtered signal, and the adjustment speed is fast without the need for multiple adjustments.

Description

Data transceiver system, data receiving equipment and control method thereof

Technical field

This application relates to the field of data transmission technology, specifically to a data transceiving system, data receiving equipment and a control method thereof.

Background technique

The receiver is generally composed of a radio frequency amplifier, a down converter, a channel filter, a low frequency amplifier and an analog to digital converter (ADC). Since the dynamic range of the ADC input terminal is much smaller than the dynamic range of the received signal, automatic gain control logic needs to be added to automatically control the gain on the receiving link according to the size of the received signal so that the signal energy obtained at the ADC input terminal is within its dynamic range.

Currently, automatic gain control is implemented at the output of the ADC; when the ADC is saturated, an attempt is made to reduce the gain of the receiving link until the ADC is not saturated.

However, the above-mentioned automatic gain control scheme has a slow adjustment speed. For large input signals, it often requires multiple adjustments before the gain can be reduced to an appropriate value.

Contents of the invention

Based on this, it is necessary to provide a data transceiver system, a data receiving device and a control method thereof that can quickly adjust the gain to an appropriate value in order to address the above-mentioned problems in the background art.

This application provides a data receiving device, including:

The first energy detection circuit is used to collect the first gain signal of the input signal and compare the first gain signal with the first preset range to output the first energy indication signal according to the comparison result;

a second energy detection circuit, configured to collect the filtered signal of the first gain signal, compare the filtered signal with a second preset range, and output a second energy indication signal according to the comparison result;

An automatic gain control circuit, connected to the first energy detection circuit and the second energy detection circuit, is used to collect the output signal of the filtered signal, and adjust the output signal according to the first energy indication signal and the second energy detection circuit. The indication signal and the output signal generate a first gain control signal and a second gain control signal; wherein the first gain control signal is used to adjust the first gain of the first gain signal relative to the input signal, so The second gain control signal is used to adjust the second gain of the output signal relative to the filtered signal.

The data receiving device in the above embodiment generates a first energy indication signal according to the signal energy of the first gain signal, generates a second energy indication signal according to the signal energy of the filtered signal, and then generates a second energy indication signal according to the first energy indication signal and the second energy indication. The signal adjusts the first gain and the second gain, because the first energy indication signal and the second energy indication signal are generated by comparing with the first preset range and the second preset range respectively, without the need for multiple times. Adjustment attempts make the adjustment faster; at the same time, for large input signals, the first gain and the second gain can be adjusted to appropriate values without multiple adjustments.

In one embodiment, the data receiving device further includes a first gain signal conversion module, a channel filtering module and a second gain signal conversion module; wherein

The first gain signal conversion module is connected to the automatic gain control circuit and is used to receive the input signal, and amplify the input signal according to the first gain under the control of the first gain control signal, and down-convert the amplified input signal to a preset frequency to form the first gain signal;

The channel filtering module is connected to the first gain signal conversion module and the second gain signal conversion module, and is used to filter the first gain signal to form the filtered signal;

The second gain signal conversion module is connected to the automatic gain control circuit and is used to amplify the filtered signal according to the second gain under the control of the second gain control signal, and amplify all the amplified signals. The filtered signal undergoes analog-to-digital conversion to form the output signal.

In one embodiment, the first gain signal conversion module includes a radio frequency amplifier and a downconverter; wherein

The radio frequency amplifier is used to receive the input signal, and under the control of the first gain control signal, amplify the input signal according to the first gain; the down converter is used to convert the amplified input signal into Downconvert to a preset frequency to form the first gain signal;

The second gain signal conversion module includes a low-frequency amplifier and an analog-to-digital conversion unit; wherein

The low-frequency amplifier is used to amplify the filtered signal according to the second gain under the control of the second gain control signal; the analog-to-digital conversion unit is used to perform analog-to-digital conversion on the amplified filtered signal. , to form the output signal.

In one embodiment, the first preset range includes a plurality of first reference gears, and the second preset range includes a plurality of second reference gears;

The first energy detection circuit is configured to: compare the first gain signal with a plurality of the first reference gears, and output a plurality of the first energy indication signals according to each comparison result;

The second energy detection circuit is configured to: compare the filtered signal with a plurality of second reference gears, and output a plurality of second energy indication signals according to each comparison result;

The automatic gain control circuit is configured to generate the first gain control signal based on a plurality of the first energy indication signals and generate the second gain control signal based on a plurality of the second energy indication signals.

Based on the same inventive concept, this application also provides a control method for a data receiving device, which is used to control the data receiving device as described in any of the above embodiments. The control method includes:

Collect a first gain signal of the input signal, and compare the first gain signal with a first preset range to output a first energy indication signal according to the comparison result;

Collect the filtered signal of the first gain signal, and compare the filtered signal with a second preset range to output a second energy indication signal according to the comparison result;

A first gain control signal and a second gain control signal are generated according to the first energy indication signal, the second energy indication signal and the output signal; wherein the first gain control signal is used to adjust the first The gain signal is a first gain relative to the input signal, and the second gain control signal is used to adjust a second gain of the output signal relative to the filtered signal.

The control method of the data receiving device in the above embodiment is used to control the data receiving device as described in any of the above embodiments. Therefore, the technical effects that can be achieved by the data receiving device in the above embodiment can also be achieved by this control method. Implementation will not be described in detail here.

In one embodiment, the first preset range includes a plurality of first reference gears, and the second preset range includes a plurality of second reference gears;

Generating the first gain control signal and the second gain control signal according to the first energy indication signal, the second energy indication signal and the output signal includes:

When the second energy indication signal indicates that the filtered signal exceeds any of the second reference levels, adjust the first gain of the first gain signal relative to the input signal according to the first energy indication signal. , and the second gain of the output signal relative to the filtered signal; when the second energy indication signal indicates that the filtered signal is lower than the second reference gear of the lowest gear, adjust the output signal according to the output signal. the first gain and the second gain.

In one embodiment, when the second energy indication signal indicates that the filtered signal exceeds any of the second reference gears, the first gain signal is adjusted relative to the first energy indication signal according to the first energy indication signal. The first gain relative to the input signal, and the second gain relative to the output signal relative to the filtered signal include:

When the first energy indication signal indicates that the first gain signal exceeds any of the first reference gears, the first gain and the second gain are reduced according to the first energy indication signal.

In one embodiment, before collecting the first gain signal of the input signal, both the first gain and the second gain are set to a maximum value.

In one embodiment, adjusting the first gain and the second gain according to the output signal includes:

The first gain and the second gain are adjusted according to the multiple difference between the amplitude average value of the output signal within one signal period and the preset amplitude average value.

Based on the same inventive concept, this application also provides a data transceiving system, including the data receiving device described in any of the above embodiments.

The data transceiver system in the above embodiments includes the data receiving device as described in any of the above embodiments. Therefore, the technical effects that can be achieved by the data receiving device in the above embodiments can also be achieved by this control method. This is not the case here. Elaborate further.

Description of drawings

In order to more clearly explain the technical solutions in the embodiments of the present application or the traditional technology, the drawings needed to be used in the description of the embodiments or the traditional technology will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of explaining the embodiments or the technical solutions of the traditional technology. For some embodiments of the application, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a data receiving device in one embodiment of the present application;

Figure 2 is a flow chart of a control method of a data receiving device in one embodiment of the present application.

Explanation of reference symbols:

10. First energy detection circuit; 20. Second energy detection circuit; 30. Automatic gain control circuit; 40. First gain signal conversion module; 401. Radio frequency amplifier; 402. Down converter; 50. Second gain signal conversion Module; 501, low-frequency amplifier; 502, analog-to-digital conversion unit; 60, channel filter module.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are given in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing specific embodiments only and is not intended to limit the application.

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first energy detection circuit may be referred to as a second energy detection circuit, and similarly, the second energy detection circuit may be referred to as a first energy detection circuit, without departing from the scope of the present application. Both the first energy detection circuit and the second resistor are energy detection circuits, but are not the same energy detection circuit.

It can be understood that "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have the transmission of electrical signals or data between each other.

As used herein, the singular forms "a," "an," and "the" may include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the terms "comprising" or "having" and the like specify the presence of stated features, integers, steps, operations, components, parts or combinations thereof, but do not exclude the presence or addition of one or more Possibility of other features, integers, steps, operations, components, parts or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

Generally speaking, the dynamic range of the ADC input terminal is much smaller than the dynamic range of the received signal, so it is necessary to add automatic gain control logic to automatically control the gain on the receiving link according to the size of the received signal, so that the signal energy obtained at the ADC input terminal is within within its dynamic range.

Currently, automatic gain control is implemented at the output of the ADC; when the ADC is saturated, an attempt is made to reduce the gain of the receiving link until the ADC is not saturated. The disadvantage of this solution is that the adjustment speed is slow. For large input signals, it often requires multiple adjustments before the gain can be reduced to an appropriate value.

Therefore, how to quickly adjust the gain to an appropriate gear is an urgent problem that needs to be solved.

Please refer to Figure 1. This application provides a data receiving device. The data receiving device may include a first energy detection circuit 10 , a second energy detection circuit 20 and an automatic gain control circuit 30 .

Specifically, the first energy detection circuit 10 can be used to collect the first gain signal a of the input signal h, and compare the first gain signal a with the first preset range, so as to output the first energy indication signal b according to the comparison result. ; The second energy detection circuit 20 can be used to collect the filtered signal c of the first gain signal a, and compare the filtered signal c with the second preset range to output the second energy indication signal d according to the comparison result; Automatic gain control The circuit 30 can be connected to the first energy detection circuit 10 and the second energy detection circuit 20, and is used to collect the output signal e of the filtered signal c, and collect the output signal e according to the first energy indication signal b, the second energy indication signal d and the output signal e. A first gain control signal f and a second gain control signal g are generated.

The first gain control signal f is used to adjust the first gain of the first gain signal relative to the input signal h, and the second gain control signal g is used to adjust the second gain of the output signal e relative to the filtered signal c.

It should be noted that, in possible embodiments of this application, the input signal h may refer to a signal received by the data receiving device. During the signal transmission process, the input signal h is amplified according to the first gain to form the first gain signal a; the first gain signal a is filtered to form the filtered signal c; the filtered signal c is amplified according to the second gain , forming the output signal e. The output signal e may refer to the signal obtained after the data receiving device amplifies, frequency converts, and demodulates the received signal.

The data receiving device in the above embodiment generates the first energy indication signal b according to the signal energy of the first gain signal a, and generates the second energy indication signal d according to the signal energy of the filtered signal c, and then generates the second energy indication signal d according to the first energy indication signal b. and the second energy indication signal d to adjust the first gain and the second gain, because the process of the first energy indication signal b and the second energy indication signal d is carried out with the first preset range and the second preset range respectively. Generated by comparison without the need for multiple adjustment attempts, making the adjustment faster and improving the efficiency of the equipment; at the same time, for a large input signal h, the first gain and the second gain can be adjusted to appropriate values without multiple adjustments. .

It should be noted that in possible embodiments of the present application, the first preset range and the second preset range may be prestored in the memory of the data receiving device; for example, the first preset range and the second preset range may be prestored in the memory of the data receiving device. In registers, cache (Cache), memory management unit (MMU) or any other device with storage function.

The data receiving device in the above embodiment can directly call the first preset range and the second preset range from the memory, without the need for multiple adjustment attempts, thereby improving the work efficiency of the device.

That is to say, in the data receiving device provided in the above embodiment, the first energy detection circuit 10 can detect the signal energy of the first gain signal a. Since the first gain signal a has not been filtered, it includes the entire receiving frequency band. Signal. The second energy detection circuit 20 can detect the signal energy of the filtered signal c. Since the filtered signal c has been filtered, it contains signals in the receiving channel.

Please continue to refer to FIG. 1 . In one embodiment, the data receiving device may further include a first gain signal conversion module 40 , a second gain signal conversion module 50 and a channel filtering module 60 .

Specifically, the first gain signal conversion module 40 is connected to the automatic gain control circuit 30 and can be used to receive the input signal h, and under the control of the first gain control signal f, amplify the input signal h according to the first gain, and amplify The final input signal h is down-converted to the preset frequency to form the first gain signal a; the channel filter module 60 is connected to the first gain signal conversion module 40 and the second gain signal conversion module 50 and can be used to convert the first gain signal a. The signal a is filtered to form the filtered signal c; the second gain signal conversion module 50 is connected to the automatic gain control circuit 30 and can be used to amplify the filtered signal c according to the second gain under the control of the second gain control signal g, And perform analog-to-digital conversion on the amplified filtered signal c to form the output signal e.

In the data receiving device provided in the above embodiment, the first gain signal conversion module 40 is used to amplify the input signal h, that is, amplify the signal within the entire receiving frequency band, and down-convert the amplified input signal h to a preset frequency. The first gain signal a is formed; the channel filter module 60 can filter out the signals outside the receiving channel in the first gain signal a to form the filtered signal c, that is, the signal in the receiving channel; the second gain signal conversion module 50 is used to The filtered signal c is amplified and analog-to-digital converted to form an output signal e for processing by the next-level circuit.

Please continue to refer to FIG. 1 . In one embodiment, the first gain signal conversion module 40 may include a radio frequency amplifier 401 and a downconverter 402 .

Specifically, the radio frequency amplifier 401 can be used to amplify the input signal h according to the first gain, and the down-converter 402 can be used to down-convert the amplified input signal h to a preset frequency to form the first gain signal a.

It should be noted that this application does not specifically limit the size of the preset frequency. In some embodiments, the frequency of the input signal h may be in the radio frequency range, and the preset frequency may be in the intermediate frequency range.

Radio frequency is not limited to a specific frequency band or frequency range. It can be any signal frequency range for wireless or cable transmission. For example, for mobile communication applications, the radio frequency range can be 880 to 1900MHz. For example, the frequency of the input signal h can be 1.9GHz, 1.85GHz, 950MHz or 880MHz, etc. For FM applications, such as FM radio, the radio frequency range can be 87~108MHz. For example, the frequency of the input signal h can be 90MHz, 95MHz or 100MHz, etc. For digital TV applications, the radio frequency range can be 110~872MHz. For example, the frequency of the input signal h can be 200MHz, 400MHz, 600MHz or 800MHz, etc. For two-way wireless communication applications, such as walkie-talkies, the radio frequency range can be 409~410MHz. For example, the frequency of the input signal h can be 410MHz. The input signal h can also be in other transmission frequency ranges. The IF may be a variable, lower frequency range than the RF. In some embodiments, the intermediate frequency range may include frequencies close to zero relative to the radio frequency. For example, the frequency of the input signal h may be 1KHz, 12.5KHz, 20KHz, 100KHz, 200KHz, 500KHz, 900KHz, 4MHz or 36MHz, etc., or other frequencies. suitable frequency.

In some embodiments, the downconverter 402 may also have an amplification function; when the downconverter 402 has an amplification function, the first gain may include the gain amplified by the downconverter 402 .

Please continue to refer to FIG. 1 . In one embodiment, the second gain signal conversion module 50 may include a low-frequency amplifier 501 and an analog-to-digital conversion unit 502 .

Specifically, the low-frequency amplifier 501 can be used to amplify the filtered signal c according to the second gain, and the analog-to-digital conversion unit 502 can be used to perform analog-to-digital conversion on the amplified filtered signal c to form the output signal e.

Please continue to refer to FIG. 1 . In one embodiment, the first preset range may include a plurality of first reference gears, and the second preset range may include a plurality of second reference gears.

In this embodiment, the first energy detection circuit 10 may be configured to: compare the first gain signal a with a plurality of first reference gears, and output a plurality of first energy indication signals b according to each comparison result; The second energy detection circuit 20 may be configured to: compare the filtered signal c with a plurality of second reference gears, and output a plurality of second energy indication signals d according to each comparison result; the automatic gain control circuit 30 may be configured as: The first gain control signal f is generated according to the plurality of first energy indication signals b, and the second gain control signal g is generated according to the plurality of second energy indication signals d.

In the data receiving device provided in the above embodiment, the first energy detection circuit 10 can compare the signal energy of the first gain signal a with a plurality of first reference gears, and output a plurality of first energy indication signals b. An energy indication signal b can indicate the comparison result between the first gain signal a and each first reference gear. According to the actual situation of comparing the signal energy of the first gain signal a with each first reference gear, a plurality of The second energy indication signal d.

For example, in a possible embodiment of the present application, the first preset range may include the following first reference gears: 12dB gear, 14dB gear, 16dB gear, 18dB gear or 20dB gear; where the 12dB gear represents the first gain signal The signal energy of a is 12dB higher than the maximum input amplitude of the subsequent stage circuit. After the signal energy of the first gain signal a is compared with a plurality of first reference gears, a plurality of first energy indication signals b can be output. These first energy indication signals b can determine whether the signal energy of the first gain signal a is high. Indicate at its corresponding first reference gear.

In this application, if the first energy indication signal b can indicate that the signal energy of the first gain signal a is higher than its corresponding first reference gear, it is called the first energy indication signal b indicating that it is valid; similarly, it will The second energy indication signal d can indicate that the signal energy of the second gain signal is higher than its corresponding first reference level, which is called the second energy indication signal d indicating that it is valid.

It can be understood that when there is more than one first energy indication signal b indicating that it is valid, the corresponding first gain control signal f should be generated according to the highest one among the plurality of first energy indication signals b that indicates that it is valid; similarly, when there is When more than one second energy indication signal d indicates validity, the corresponding second gain control signal g should be generated according to the highest level among the plurality of second energy indication signals d indicating validity.

Similarly, the second energy detection circuit 20 can compare the signal energy of the filtered signal c with a plurality of second reference levels to output a plurality of second energy indication signals d. These second energy indication signals d can be based on the filtered signal It is indicated whether the signal energy of c is higher than its corresponding second reference gear.

The data receiving device in the above embodiment, compared with the multiple attempts of traditional equipment during the debugging process, can combine the first gain and The second gain is adjusted in place at once, further improving the gain adjustment speed; for large input signals, the first gain and the second gain can also be directly adjusted according to the specific gears indicated by the first energy indication signal b and the second energy indication signal d. Adjust the second gain to the appropriate value.

It should be noted that in the data receiving device provided by the above embodiment, the minimum value of the lowest first reference gear can correspond to the maximum amplitude value allowed to be input by the circuit behind the first energy detection circuit 10; The minimum value of the two reference gears may correspond to the maximum amplitude value allowed to be input by the subsequent stage circuit of the second energy detection circuit 20 .

Based on the same inventive concept, this application also provides a control method for a data receiving device, which is used to control the data receiving device as described in any of the above embodiments. Please refer to Figure 2 in conjunction with Figure 1. The control method may include the following steps:

S1: Collect the first gain signal a of the input signal h, and compare the first gain signal a with the first preset range to output the first energy indication signal b according to the comparison result.

S2: Collect the filtered signal c of the first gain signal a, and compare the filtered signal c with the second preset range, so as to output the second energy indication signal d according to the comparison result.

S3: When the second energy indication signal d indicates that the filtered signal c exceeds the second preset range, adjust the first gain of the first gain signal a relative to the input signal h according to the first energy indication signal b, and adjust the first gain of the first gain signal a relative to the input signal h, and the output signal e relative to The second gain of the filtered signal c; when the second energy indication signal d indicates that the filtered signal c is in the second preset range, the first gain and the second gain are adjusted according to the output signal e.

The control method of the data receiving device in the above embodiment is used to control the data receiving device as described in any of the above embodiments. Therefore, the technical effects that can be achieved by the data receiving device in the above embodiment can also be achieved by this control method. Implementation will not be described in detail here.

In one embodiment, before step S1, a step of setting both the first gain and the second gain to a maximum value may be included.

In the control method of the data receiving device in the above embodiment, before starting the reception, both the first gain and the second gain are set to the maximum value. This can ensure that small signals can be received by the data receiving device and improve the compatibility of the control method. sex.

Step S3 will be described in more detail below.

In one embodiment, step S3 may specifically include the following steps:

When the second energy indication signal d indicates that the filtered signal c exceeds any second reference level, the first gain of the first gain signal a relative to the input signal h is adjusted according to the first energy indication signal b, and the output signal e is adjusted relative to The second gain of the filtered signal c; when the second energy indication signal d indicates that the filtered signal c is lower than the second reference gear of the lowest gear, the first gain and the second gain are adjusted according to the output signal e.

It can be understood that this application does not limit the specific order of adjusting the first gain and the second gain in the above steps. For example, when the second energy indication signal d indicates that the filtered signal c exceeds any second reference level, the first gain can be reduced first according to the first energy indication signal b; if it is not enough, the second gain can be reduced. When the second energy indication signal d indicates that the filtered signal c is lower than the second reference gear of the lowest gear, the second gain can be increased first according to the output signal e; if it is not enough, the first gain can be increased.

In one embodiment, when the second energy indication signal d indicates that the filtered signal c exceeds any second reference level, the first gain of the first gain signal a relative to the input signal h is adjusted according to the first energy indication signal b. , and the step of outputting the second gain of the signal e relative to the filtered signal c may specifically include the following steps:

When the first energy indication signal b indicates that the first gain signal a exceeds any first reference level, the first gain and the second gain are reduced according to the first energy indication signal b.

Specifically, when the first energy indication signal b indicates that the signal energy of the first gain signal a exceeds any first reference level, and the second energy indication signal d indicates that the signal energy of the filtered signal c also exceeds any second reference gear, this corresponds to the situation where the signal energy in the receiving channel is too large; at this time, the first gain and the second gain should be reduced according to the first energy indication signal b.

It should be noted that, as shown in FIG. 1 , the filtered signal c collected by the second energy detection circuit 20 is obtained by filtering the first gain signal a after the first energy indication signal b. That is to say, the second energy indication signal The point detected by the signal d is filtered after the first energy indication signal b. The filtering process can be considered to have no amplification effect, so the signal energy detected by the second energy detection circuit 20 cannot be greater than the first energy detection The signal energy detected by the circuit 10, therefore, the absence of the first energy indication signal b indicates that the signal energy of the first gain signal a is lower than the first reference gear of the lowest gear, and the second energy indication signal d indicates the filtered signal c The signal energy exceeds any second reference gear.

When the second energy indication signal d indicates that the signal energy of the filtered signal c is lower than the second reference gear of the lowest gear, no matter whether the signal energy of the first gain signal a is lower than the first reference gear of the lowest gear, The first gain or the second gain is no longer adjusted according to the first energy indication signal b, but the first gain and the second gain are adjusted according to the output signal e.

Wherein, when the second energy indication signal d indicates that the signal energy of the filtered signal c is lower than the second reference gear of the lowest gear, and the first energy indication signal b indicates that the signal energy of the first gain signal a exceeds any first reference gear, this corresponds to the situation where the signal energy in the receiving frequency band is large but the signal energy in the receiving channel is not large; when the second energy indicator signal d indicates that the signal energy of the filtered signal c is lower than the second reference gear of the lowest gear bit, and the first energy indication signal b indicates that the signal energy of the first gain signal a is also lower than the lowest first reference gear, this corresponds to the fact that the signal energy in the receiving frequency band is not large, and the signal energy in the receiving channel Not a big deal either.

For step S3, in one embodiment, the process of adjusting the first gain and the second gain according to the output signal e may include the following steps:

The first gain and the second gain are adjusted according to the multiple difference between the average amplitude of the output signal e in one signal period and the preset average amplitude.

In the above control method, the multiple difference between the amplitude average value of the output signal e in one signal period and the preset amplitude average value can be calculated; the first gain and the second gain are increased according to this multiple difference. For example, if the average amplitude of the output signal e in one signal period is 1/4 of the preset average amplitude, then the first gain and the second gain are increased by 4 times.

It can be understood that this application does not specifically limit the size of the preset amplitude average value; the preset amplitude average value can be adaptively set according to the amplitude average value expected by the data receiving device in actual work.

Based on the same inventive concept, this application also provides a data transceiving system, including the data receiving device described in any of the above embodiments.

The data transceiver system in the above embodiments includes the data receiving device as described in any of the above embodiments. Therefore, the technical effects that can be achieved by the data receiving device in the above embodiments can also be achieved by this control method. This is not the case here. Elaborate further.

In the description of this specification, reference to the description of the terms "one of the embodiments" or "possible embodiments" or the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one of the present applications. in an embodiment or example. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims (10)

1. A data receiving apparatus, comprising:

the first energy detection circuit is used for collecting an input signal, amplifying the input signal according to a first gain to form a first gain signal, and comparing the first gain signal with a first preset range to output a first energy indication signal according to a comparison result;

the second energy detection circuit is used for collecting a filtering signal formed by filtering the first gain signal, comparing the filtering signal with a second preset range and outputting a second energy indication signal according to a comparison result;

the automatic gain control circuit is connected with the first energy detection circuit and the second energy detection circuit and is used for collecting output signals of the filtering signals and generating a first gain control signal and a second gain control signal according to the first energy indication signal, the second energy indication signal and the output signals; wherein the first gain control signal is used to adjust a first gain of the first gain signal relative to the input signal and the second gain control signal is used to adjust a second gain of the output signal relative to the filtered signal.

2. The data receiving device of claim 1, further comprising a first gain signal conversion module, a channel filtering module, and a second gain signal conversion module; wherein the method comprises the steps of

The first gain signal conversion module is connected with the automatic gain control circuit and is used for receiving the input signal, amplifying the input signal according to the first gain under the control of the first gain control signal, and down-converting the amplified input signal to a preset frequency to form the first gain signal;

the channel filtering module is connected with the first gain signal conversion module and the second gain signal conversion module and is used for filtering the first gain signal to form the filtered signal;

the second gain signal conversion module is connected with the automatic gain control circuit and is used for amplifying the filtering signal according to the second gain under the control of the second gain control signal and performing analog-to-digital conversion on the amplified filtering signal to form the output signal.

3. The data receiving device of claim 2, wherein the first gain signal conversion module comprises a radio frequency amplifier and a down converter; wherein the method comprises the steps of

The radio frequency amplifier is used for receiving the input signal and amplifying the input signal according to the first gain under the control of the first gain control signal; the down converter is used for down-converting the amplified input signal to a preset frequency so as to form the first gain signal;

the second gain signal conversion module comprises a low-frequency amplifier and an analog-to-digital conversion unit; wherein the method comprises the steps of

The low-frequency amplifier is used for amplifying the filtering signal according to the second gain under the control of the second gain control signal; the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the amplified filter signal to form the output signal.

4. The data receiving apparatus according to claim 1, wherein the first preset range includes a plurality of first reference gear steps, and the second preset range includes a plurality of second reference gear steps;

the first energy detection circuit is configured to: comparing the first gain signal with a plurality of first reference gears, and outputting a plurality of first energy indication signals according to comparison results;

the second energy detection circuit is configured to: comparing the filtered signal with a plurality of second reference gears, and outputting a plurality of second energy indication signals according to each comparison result;

the automatic gain control circuit is configured to: the first gain control signal is generated according to a plurality of the first energy indication signals, and the second gain control signal is generated according to a plurality of the second energy indication signals.

5. A control method of a data receiving apparatus, characterized by being used for controlling the data receiving apparatus according to any one of claims 1 to 4, the control method comprising:

collecting an input signal, amplifying the input signal according to a first gain to form a first gain signal, and comparing the first gain signal with a first preset range to output a first energy indication signal according to a comparison result;

collecting a filtering signal formed by filtering the first gain signal, and comparing the filtering signal with a second preset range to output a second energy indication signal according to a comparison result;

generating a first gain control signal and a second gain control signal according to the first energy indication signal, the second energy indication signal and the output signal; wherein the first gain control signal is used to adjust a first gain of the first gain signal relative to the input signal and the second gain control signal is used to adjust a second gain of the output signal relative to the filtered signal.

6. The control method of the data receiving apparatus according to claim 5, wherein the first preset range includes a plurality of first reference gear steps, and the second preset range includes a plurality of second reference gear steps;

the generating a first gain control signal and a second gain control signal according to the first energy indication signal, the second energy indication signal and the output signal includes:

when the second energy indication signal indicates that the filtered signal exceeds any second reference gear, adjusting a first gain of the first gain signal relative to the input signal and a second gain of the output signal relative to the filtered signal according to the first energy indication signal; and when the second energy indication signal indicates that the filtered signal is lower than the second reference gear of the lowest first gear, adjusting the first gain and the second gain according to the output signal.

7. The method according to claim 6, wherein adjusting a first gain of the first gain signal with respect to the input signal and a second gain of the output signal with respect to the filtered signal according to the first energy indication signal when the second energy indication signal indicates that the filtered signal exceeds any one of the second reference gear positions, comprises:

and when the first energy indication signal indicates that the first gain signal exceeds any first reference gear, reducing the first gain and the second gain according to the first energy indication signal.

8. The method according to claim 5, wherein the first gain and the second gain are each set to a maximum value before the acquisition of the first gain signal of the input signal.

9. The method according to claim 5, wherein adjusting the first gain and the second gain according to the output signal comprises:

and adjusting the first gain and the second gain according to the multiple difference between the average amplitude value of the output signal in one signal period and the preset average amplitude value.

10. A data transceiving system comprising a data receiving device as claimed in any of claims 1 to 4.