CN114650075B - Data transmitting/receiving system, data receiving apparatus, and control method thereof - Google Patents
Data transmitting/receiving system, data receiving apparatus, and control method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
Abstract
The application relates to a data transmitting and receiving system, a data receiving device and a control method thereof. The data receiving apparatus includes: the first energy detection circuit is used for comparing the first gain signal with a first preset range and outputting a first energy indication signal according to a comparison result; the second energy detection circuit is used for comparing the filtered 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 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; the first gain control signal is used for adjusting the first gain, and the second gain control signal is used for adjusting the second gain. The data receiving device can adjust the first gain and the second gain according to the first gain signal and the filtering signal, and the adjustment speed is high without multiple times of adjustment.
Description
Technical Field
The present application relates to the field of data transmission technologies, and in particular, to a data transceiver system, a data receiving device, and a control method thereof.
Background
The receiver (receiver) is typically comprised of a radio frequency amplifier, a down converter, a channel filter, a low frequency amplifier, and an analog to digital converter (analog to digital converter, ADC). Since the dynamic range of the ADC input is much smaller than that of the received signal, automatic gain control logic needs to be added to automatically control the gain on the receive link according to the magnitude of the received signal so that the signal energy at the ADC input 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 receive chain until the ADC is not saturated.
However, the automatic gain control scheme is slow to adjust, and for large input signals, multiple adjustments are often required to reduce the gain to a suitable value.
Disclosure of Invention
In view of the above, it is necessary to provide a data transmission/reception system, a data reception device, and a control method thereof, which can quickly adjust the gain to an appropriate value, in view of the problems in the background art described above.
The present application provides a data receiving apparatus including:
the first energy detection circuit is used for acquiring a first gain signal of an input signal, comparing the first gain signal with a first preset range and outputting a first energy indication signal according to a comparison result;
the second energy detection circuit is used for collecting a filtering signal of 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.
The data receiving device in the above embodiment generates the first energy indication signal according to the signal energy of the first gain signal, generates the second energy indication signal according to the signal energy of the filtered signal, and then adjusts the first gain and the second gain according to the first energy indication signal and the second energy indication signal, wherein 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 in the process of the first energy indication signal and the second energy indication signal, and multiple adjustment attempts are not needed, so that the adjustment speed is higher; meanwhile, for a large input signal, 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 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.
In one embodiment, the first gain signal conversion module includes 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.
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: 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.
Based on the same inventive concept, the present application further provides a control method of a data receiving apparatus, for controlling the data receiving apparatus according to any one of the above embodiments, the control method comprising:
collecting a first gain signal of an input 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 of 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.
The control method of the data receiving apparatus in the foregoing embodiment is used to control the data receiving apparatus in any of the foregoing embodiments, so that the technical effects achieved by the data receiving apparatus in the foregoing embodiments can be achieved, and the control method is not described in detail herein.
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 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.
In one embodiment, when the second energy indication signal indicates that the filtered signal exceeds any of the second reference gear positions, 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 includes:
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.
In one embodiment, the first gain and the second gain are both set to a maximum value prior to the acquisition of the first gain signal of the input signal.
In one embodiment, the adjusting the first gain and the second gain according to the output signal includes:
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.
Based on the same inventive concept, the application also provides a data receiving and transmitting system, which comprises the data receiving device according to any embodiment.
The data transceiver system in the above embodiment includes the data receiving device in any of the above embodiments, so that the technical effects achieved by the data receiving device in the above embodiment can be achieved, and the control method is also achieved, which is not described in detail herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic structural diagram of a data receiving device according to an embodiment of the present application;
fig. 2 is a flowchart of a control method of a data receiving device according to one embodiment of the present application.
Reference numerals illustrate:
10. a first energy detection circuit; 20. a second energy detection circuit; 30. an automatic gain control circuit; 40. a first gain signal conversion module; 401. a radio frequency amplifier; 402. a down converter; 50. a second gain signal conversion module; 501. a low frequency amplifier; 502. an analog-to-digital conversion unit; 60. and a channel filtering module.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms first, second, etc. as used herein may be used 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, a second energy detection circuit may be referred to as a first energy detection circuit, without departing from the scope of the application. The first energy detection circuit and the second resistor are both energy detection circuits, but not the same energy detection circuit.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
Generally, the dynamic range of the ADC input is much smaller than that of the received signal, so that the automatic gain control logic needs to be added to automatically control the gain on the receiving link according to the magnitude of the received signal, so that the signal energy obtained at the ADC input is within the dynamic range thereof.
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 receive chain until the ADC is not saturated. The disadvantage of this solution is the slow adjustment speed, which often requires multiple adjustments for large input signals to reduce the gain to a suitable value.
Therefore, how to quickly adjust the gain to a suitable gear is a current urgent problem to be solved.
Referring to fig. 1, the present application provides a data receiving apparatus. The data receiving apparatus 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 may be configured to collect a first gain signal a of the input signal h, and compare the first gain signal a with a first preset range, so as to output a first energy indication signal b according to a comparison result; the second energy detection circuit 20 may be configured to collect the filtered signal c of the first gain signal a, and compare the filtered signal c with a second preset range, so as to output a second energy indication signal d according to the comparison result; the automatic gain control circuit 30 may be connected to the first energy detection circuit 10 and the second energy detection circuit 20, and is configured to collect the output signal e of the filtered signal c, and generate the first gain control signal f and the second gain control signal g according to the first energy indication signal b, the second energy indication signal d, and the output signal e.
Wherein 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 embodiments possibly related to the present application, the input signal h may be a signal received by the data receiving device. In the signal transmission process, amplifying an input signal h according to a first gain to form a first gain signal a; filtering the first gain signal a to form a filtered signal c; the filtered signal c is amplified according to the second gain to form an output signal e. The output signal e may be a signal obtained by amplifying, frequency-converting, demodulating, etc. the received signal by the data receiving apparatus.
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, generates the second energy indication signal d according to the signal energy of the filtered signal c, and then adjusts the first gain and the second gain according to the first energy indication signal b and the second energy indication signal d, wherein the first energy indication signal b and the second energy indication signal d are generated by comparing with the first preset range and the second preset range respectively, without multiple adjustment attempts, so that the adjustment speed is faster, and the working efficiency of the device is improved; meanwhile, 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 a possible embodiment of the present application, the first preset range and the second preset range may be pre-stored in a memory of the data receiving device; for example, the first and second predetermined ranges may be pre-stored in registers, cache (Cache), memory management unit (memory management unit, MMU), or any other device having a 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 multiple adjustment attempts, thereby improving the working efficiency of the device.
That is, in the data receiving apparatus provided in the above embodiment, the first energy detecting circuit 10 may detect the signal energy of the first gain signal a, and since the first gain signal a has not been filtered, the signal in the entire receiving frequency band is included. The second energy detection circuit 20 may detect the signal energy of the filtered signal c, which, because it has been filtered, contains the signal within the receiving channel.
With continued reference to fig. 1, in one embodiment, the data receiving apparatus 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 is configured to receive an input signal h, amplify the input signal h according to a first gain under the control of the first gain control signal f, and down-convert the amplified input signal h to a preset frequency to form a first gain signal a; the channel filtering module 60 is connected to the first gain signal converting module 40 and the second gain signal converting module 50, and can be used for filtering the first gain signal a to form a filtered signal c; the second gain signal conversion module 50 is connected to the automatic gain control circuit 30, and can be used for amplifying the filtered signal c according to the second gain under the control of the second gain control signal g, and performing analog-to-digital conversion on the amplified filtered signal c to form an output signal e.
In the data receiving apparatus provided in the foregoing embodiment, the first gain signal conversion module 40 is configured to amplify the input signal h, that is, amplify a signal in the entire receiving frequency band, and downconvert the amplified input signal h to a preset frequency to form the first gain signal a; the channel filtering module 60 may filter out the signal outside the receiving channel in the first gain signal a to form a filtered signal c, that is, a signal inside the receiving channel; the second gain signal conversion module 50 is configured to amplify the filtered signal c and perform analog-to-digital conversion to form an output signal e for processing by a next stage circuit.
With continued reference to fig. 1, in one embodiment, the first gain signal conversion module 40 may include a radio frequency amplifier 401 and a down converter 402.
Specifically, the rf amplifier 401 may be configured to amplify the input signal h according to a first gain, and the down-converter 402 may be configured to down-convert the amplified input signal h to a preset frequency to form the first gain signal a.
It should be noted that the magnitude of the preset frequency is not particularly limited in the present application. 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.
The radio frequency is not limited to a particular frequency band or range of frequencies, but may be any wireless or cable-transmitted signal frequency range. For example, for mobile communications applications, the radio frequency range may be 880-1900 MHz, e.g., the frequency of the input signal h may be 1.9GHz, 1.85GHz, 950MHz, 880MHz, etc. For frequency modulation applications, such as fm radios, the radio frequency range may be 87-108 MHz, for example, the frequency of the input signal h may be 90MHz, 95MHz, 100MHz, or the like. For digital television applications, the radio frequency range may be 110-872 MHz, for example, the frequency of the input signal h may be 200MHz, 400MHz, 600MHz or 800MHz, etc. For two-way wireless communication applications, such as walkie-talkies, the radio frequency range may be 409-410 MHz, for example the frequency of the input signal h may be 410MHz. The input signal h may also be in other transmission frequency ranges. The intermediate frequency may be a variable, lower frequency range than the radio frequency. In some embodiments, the intermediate frequency range may include frequencies near 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, 36MHz, etc., as well as other suitable frequencies.
In some embodiments, the down converter 402 may also have an amplifying effect; when the down converter 402 has an amplifying effect, the first gain may include a gain amplified by the down converter 402.
With continued reference 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 may be configured to amplify the filtered signal c according to the second gain, and the analog-to-digital conversion unit 502 may be configured to perform analog-to-digital conversion on the amplified filtered signal c to form the output signal e.
With continued reference 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 the present embodiment, the first energy detection circuit 10 may be configured to: comparing the first gain signal a with a plurality of first reference gears, and outputting a plurality of first energy indication signals b according to each comparison result; the second energy detection circuit 20 may be configured to: comparing the filtered signal c with a plurality of second reference gears, and outputting a plurality of second energy indication signals d according to each comparison result; the automatic gain control circuit 30 may be configured to: the first gain control signal f is generated from the plurality of first energy indication signals b and the second gain control signal g is generated from the plurality of second energy indication signals d.
In the data receiving apparatus provided in the above embodiment, the first energy detecting circuit 10 may compare the signal energy of the first gain signal a with a plurality of first reference gear positions, output a plurality of first energy indicating signals b, which can indicate the comparison result of the first gain signal a with each first reference gear position, and output a plurality of second energy indicating signals d according to the actual situation that the signal energy of the first gain signal a is compared with each first reference gear position.
For example, in one possible embodiment of the present application, the first preset range may include the following first reference gear: 12dB, 14dB, 16dB, 18dB or 20 dB; wherein, 12dB represents that the signal energy of the first gain signal 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 the plurality of first reference gears, a plurality of first energy indication signals b can be output, and the first energy indication signals b can indicate whether the signal energy of the first gain signal a is higher than the corresponding first reference gears.
In the application, the first energy indication signal b can indicate that the signal energy of the first gain signal a is higher than the corresponding first reference gear, and is called the first energy indication signal b to indicate effective; similarly, the second energy indication signal d is referred to as the second energy indication signal d indicating that the signal energy of the second gain signal is higher than the corresponding first reference gear.
It will be appreciated that when there is more than one first energy indication signal b indicating validity, a corresponding first gain control signal f should be generated from the highest one of the plurality of first energy indication signals b indicating validity; similarly, when more than one second energy indication signal d indicates validity, a corresponding second gain control signal g should be generated according to the highest level of the plurality of second energy indication signals d indicating validity.
Similarly, the second energy detecting circuit 20 may compare the signal energy of the filtered signal c with a plurality of second reference gears to output a plurality of second energy indicating signals d, which can be indicated according to whether the signal energy of the filtered signal c is higher than the corresponding second reference gears.
Compared with multiple attempts of the traditional device in the debugging process, the data receiving device in the embodiment can adjust the first gain and the second gain in place at one time according to the specific gear indicated by the first energy indication signal b and the second energy indication signal d, so that the gain adjusting speed is further improved; for large input signals, the first and second gains can also be adjusted directly to appropriate values according to the specific gear indicated by the first and second energy indication signals b and d.
It should be noted that, in the data receiving apparatus provided in the foregoing embodiment, the minimum value of the first reference gear of the lowest first gear may correspond to the maximum amplitude value that the primary circuit following the first energy detecting circuit 10 allows to input; the minimum value of the lowest first gear second reference gear may correspond to the maximum amplitude value that the primary circuit following the second energy detection circuit 20 allows to input.
Based on the same inventive concept, the present application also provides a control method of a data receiving apparatus, for controlling the data receiving apparatus according to any one of the above embodiments. Referring to fig. 2 in conjunction with fig. 1, the control method may include the steps of:
s1: and acquiring a first gain signal a of the input signal h, and comparing the first gain signal a with a first preset range to output a first energy indication signal b according to a comparison result.
S2: and acquiring a filtered signal c of the first gain signal a, and comparing the filtered signal c with a second preset range to output a second energy indication signal d according to a comparison result.
S3: when the second energy indication signal d indicates that the filtered signal c exceeds a second preset range, adjusting a first gain of the first gain signal a relative to the input signal h and a second gain of the output signal e relative to the filtered signal c according to the first energy indication signal b; 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 apparatus in the foregoing embodiment is used to control the data receiving apparatus in any of the foregoing embodiments, so that the technical effects achieved by the data receiving apparatus in the foregoing embodiments can be achieved, and the control method is not described in detail herein.
In one embodiment, before step S1, the method may further include setting the first gain and the second gain to a maximum value.
In the control method of the data receiving device in the above embodiment, before starting the reception, the first gain and the second gain are set to the maximum values, so that the small signals can be ensured to be received by the data receiving device, and the compatibility of the control method is improved.
Step S3 is described in more detail below.
In one embodiment, the 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 gear, adjusting a first gain of the first gain signal a relative to the input signal h and a second gain of the output signal e relative to the filtered signal c according to the first energy indication signal b; when the second energy indication signal d indicates that the filtered signal c is lower than the second reference gear of the lowest first gear, the first gain and the second gain are adjusted according to the output signal e.
It will be appreciated that the specific order of adjusting the first gain and the second gain in the above steps is not limited in the present application. For example, when the second energy indication signal d indicates that the filtered signal c exceeds any second reference gear, the first gain may be reduced according to the first energy indication signal b; if not, the second gain is reduced. When the second energy indication signal d indicates that the filtered signal c is lower than the second reference gear of the lowest first gear, the second gain may be increased according to the output signal e; if not, the first gain is increased.
In one embodiment, when the second energy indication signal d indicates that the filtered signal c exceeds any second reference gear, the step of adjusting the first gain of the first gain signal a relative to the input signal h and the second gain of the output signal e relative to the filtered signal c according to the first energy indication signal b may specifically include the following steps:
when the first energy indication signal b indicates that the first gain signal a exceeds any first reference gear, 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 one of the first reference gear positions, and the second energy indication signal d indicates that the signal energy of the filtered signal c also exceeds any one of the second reference gear positions, this corresponds to a case 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, the point detected by the second energy indication signal d is filtered after the first energy indication signal b, and the filtering process may be considered as no amplification effect, so that the signal energy detected by the second energy detection circuit 20 may not be greater than the signal energy detected by the first energy detection circuit 10, and therefore, there is no first reference gear where the signal energy of the first gain signal a is indicated by the first energy indication signal b to be lower than the lowest first gear, and the signal energy of the filtered signal c is indicated by the second energy indication signal d to be higher than 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 first gear, no matter whether the signal energy of the first gain signal a is lower than the first reference gear of the lowest first gear, the first gain or the second gain is not adjusted according to the first energy indication signal b any more, but the first gain and the second gain are adjusted according to the output signal e.
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 first gear, and the first energy indication signal b indicates that the signal energy of the first gain signal a exceeds any first reference gear, the situation that the signal energy in the receiving frequency band is large and the signal energy in the receiving channel is not large corresponds to the situation; 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 first gear and the first energy indication signal b indicates that the signal energy of the first gain signal a is also lower than the first reference gear of the lowest first gear, this corresponds to the situation that the signal energy in the receiving frequency band is not large and the signal energy in the receiving channel is not large.
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:
and adjusting the first gain and the second gain according to the multiple difference between the average amplitude value of the output signal e in one signal period and the preset average amplitude value.
In the above control method, a multiple difference between an average value of the amplitude of the output signal e in one signal period and a preset average value of the amplitude can be calculated; the first gain and the second gain are increased according to the 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, the first gain and the second gain are increased by 4 times.
It can be understood that the magnitude of the preset amplitude average value is not particularly limited; the preset amplitude average value may be adaptively set according to an amplitude average value expected by the data receiving apparatus in actual operation.
Based on the same inventive concept, the application also provides a data receiving and transmitting system, which comprises the data receiving device according to any embodiment.
The data transceiver system in the above embodiment includes the data receiving device in any of the above embodiments, so that the technical effects achieved by the data receiving device in the above embodiment can be achieved, and the control method is also achieved, which is not described in detail herein.
In the description of the present specification, reference to the term "one embodiment" or "a possible embodiment" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. 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 may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to 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.
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