CN113014282B - Automatic gain control method, device, receiver and ultra-wideband communication system - Google Patents
Automatic gain control method, device, receiver and ultra-wideband communication system Download PDFInfo
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- CN113014282B CN113014282B CN202110190380.XA CN202110190380A CN113014282B CN 113014282 B CN113014282 B CN 113014282B CN 202110190380 A CN202110190380 A CN 202110190380A CN 113014282 B CN113014282 B CN 113014282B
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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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an automatic gain control method, an automatic gain control device, a receiver and an ultra-wideband communication system, and particularly relates to the technical field of wireless communication. The method comprises presetting a power threshold of a received signal; judging whether the power of the received signal meets the power threshold or not based on the power threshold; and if the power of the received signal meets the power threshold, carrying out analog gain control according to the power of the received signal. The power threshold of the received signal is preset to obtain the power of the received signal which is relatively ideal, and then the power of the received signal meeting the power threshold is utilized to carry out analog gain control, so that the gain adjustment times are reduced, signal convergence is completed in a relatively short time, the synchronization of the ultra-wideband signal in a time domain and a frequency domain is completed in a relatively short time, and the stability of signal transmission is ensured.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an automatic gain control method, an automatic gain control device, a receiver and an ultra-wideband communication system.
Background
In the prior art, automatic gain control is to perform power estimation on a received signal by using an analog front end of a receiver, compare the power estimation value with a threshold value of corresponding signal energy, control and adjust a baseband signal through analog gain according to a comparison result, and finally repeat the processes of power estimation and analog gain adjustment until the received signal converges. Although the conventional automatic gain control method realizes the control of the input voltage after the analog-to-digital conversion, the conventional automatic gain control requires a long convergence time.
In an ultra-wideband system, in order to obtain more accurate data information, an ultra-wideband receiver needs to complete synchronization of a received signal in a time domain and a frequency domain within a short time, and the requirement of the ultra-wideband system on signal synchronization cannot be met by using the existing automatic gain control, that is, synchronization of an ultra-wideband signal in the time domain and the frequency domain needs to be completed within a short time, and stability of signal transmission is ensured.
Disclosure of Invention
In view of this, embodiments of the present invention provide an automatic gain control method, an automatic gain control apparatus, a receiver, and an ultra-wideband communication system, so as to solve the problem that the existing automatic gain control has a long convergence time, which results in that the ultra-wideband system cannot complete signal synchronization in a short time.
According to a first aspect, an embodiment of the present invention provides an automatic gain control method, including: presetting a power threshold of a received signal; judging whether the power of the received signal meets the power threshold or not based on the power threshold; and if the power of the received signal meets the power threshold, carrying out analog gain control according to the power of the received signal.
The automatic gain control method provided by the embodiment of the invention obtains the more ideal power of the received signal by presetting the power threshold of the received signal, and then performs analog gain control by using the power of the received signal meeting the power threshold, thereby reducing the times of gain adjustment, realizing signal convergence in a shorter time, completing the synchronization of the ultra-wideband signal in a time domain and a frequency domain in a shorter time, and ensuring the stability of signal transmission.
With reference to the first aspect, in a first implementation manner of the first aspect, if the power of the received signal does not satisfy the power threshold, the analog gain of the analog front end is adjusted so that the power of the received signal satisfies the power threshold.
According to the automatic gain control method provided by the embodiment of the invention, the power threshold of the received signal which does not meet the power threshold is adjusted, so that the synchronization of the ultra-wideband signal in the time domain and the frequency domain can be quickly and flexibly realized, and the stability of the ultra-wideband signal is ensured.
With reference to the first aspect, in a second implementation manner of the first aspect, the presetting a power threshold of a received signal includes: the power threshold of the received signal is set at the output of the low noise amplifier of the analog front end.
According to the automatic gain control method provided by the embodiment of the invention, the power threshold of the received signal is set at the output end of the low noise amplifier at the analog front end, so that the stable received signal can be obtained.
With reference to the first aspect, in a third implementation manner of the first aspect, if the power of the received signal satisfies the power threshold, performing analog gain control according to the power of the received signal includes: performing analog-to-digital conversion based on the power of the received signal to obtain a power digital quantity of the received signal; performing baseband power estimation on the power digital quantity of the received signal to obtain a preset analog gain; and adjusting the analog gain of the analog front end by using the preset analog gain or controlling the baseband power.
According to the automatic gain control method provided by the embodiment of the invention, the digital quantity of the received signal is obtained by performing analog-to-digital conversion on the acquired analog quantity of the received signal, so that the guarantee is provided for the subsequent power estimation, and the accurate baseband power control can be realized.
With reference to the first aspect, in a fourth implementation manner of the first aspect, before the performing analog gain control according to the power of the received signal, the method includes: performing power amplification on the received signal based on the power of the received signal to obtain a power amplified signal of the received signal; and performing analog gain control by using the power amplification signal of the received signal.
According to the automatic gain control method provided by the embodiment of the invention, the power signal is amplified, so that the accuracy of subsequent analog gain control is ensured, and the stability of signal transmission is ensured.
According to a second aspect, an embodiment of the present invention provides an automatic gain control apparatus, including: the device comprises a presetting module, a power control module and a power control module, wherein the presetting module is used for presetting a power threshold of a received signal; a judging module, configured to judge whether the power of the received signal satisfies the power threshold based on the power threshold; and the control module is used for carrying out analog gain control according to the power of the received signal if the power of the received signal meets the power threshold.
With reference to the second aspect, in a first embodiment of the second aspect, the method includes: and the adjusting module is used for adjusting the analog gain of the analog front end to enable the power of the received signal to meet the power threshold if the power of the received signal does not meet the power threshold.
The automatic gain control device provided by the embodiment of the invention utilizes the preset module to preset the power threshold of the received signal, judges the power of the received signal and the power threshold in the preset module through the judgment module after the received signal is obtained, controls the analog gain through the control module when the power of the received signal meets the power threshold set in the preset module, adjusts the analog gain of the analog front end through the adjustment module when the power of the received signal does not meet the power threshold set in the preset module, firstly makes the power of the received signal meet the power threshold set by the preset module and then performs the analog gain control, thereby obtaining shorter automatic gain control convergence time and further completing the synchronization of the received signal in a time domain and a frequency domain according to the convergence time.
According to a third aspect, an embodiment of the present invention provides a receiver, including: the second aspect and the automatic gain control apparatus provided in the first embodiment of the second aspect are configured to execute the automatic gain control method described in the first aspect or any one of the first to third embodiments.
According to a fourth aspect, an embodiment of the present invention provides an ultra-wideband communication system, comprising: the receiver provided in the third aspect.
According to a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the automatic gain control method described in the first aspect or any one of the implementation manners of the first aspect.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 is a diagram of an ultra-wideband physical layer packet and a synchronization portion of the IEEE 802.15.4 protocol;
FIG. 2 is a diagram of a waveform for a preamble transmission;
fig. 3 is a flowchart of an automatic gain control method according to an embodiment of the present invention;
fig. 4 is a flow chart of a method of automatic gain control according to an alternative embodiment of the present invention;
fig. 5 is a flowchart of step S12 in an automatic gain control method according to an alternative embodiment of the present invention;
fig. 6 is a block diagram of an automatic gain control apparatus according to an embodiment of the present invention;
fig. 7 is a block diagram of a receiver according to an embodiment of the present invention;
fig. 8 is a block diagram of an ultra-wideband communication system according to an embodiment of the present invention.
Reference numerals
10-presetting a module; 11-a judging module; 12-a control module; 20-an antenna; 21-analog front end; 22-an analog-to-digital converter; 23-an analog gain control unit; 30-a receiving device; 31-a transmitting device; 32-a processor; 33-memory.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the automatic gain control method provided in the embodiments of the present application may be applied to communication systems such as a narrowband and a wideband, and is preferably applicable to an ultra-wideband communication system, and the method is used to solve the problem that the existing self-gain control needs to adjust the signal size for multiple times to make the signal converge, so as to ensure the stability of the transmission signal, and on this basis, it can also ensure that signal synchronization can be completed in a short time in the ultra-wideband communication system.
Specifically, the embodiment of the present invention provides an automatic gain control method and an automatic gain control apparatus, where the implemented automatic gain control method needs to correspond to the automatic gain control apparatus, and the apparatus may include: the device comprises an antenna, an analog front end, an analog-to-digital converter, a gain control unit and control equipment, wherein the antenna is used for receiving signals; the control device is configured to receive parameter information preset by a user and perform parameter adjustment on each hardware/unit according to the parameter information, for example: setting an initial power threshold; the analog front end is used for amplifying the received signal and ensuring the stability of the signal, and the analog front end also comprises a low noise amplifier and a power amplifier; the analog-to-digital converter is used for converting the analog quantity output by the analog front end unit into digital quantity, sending the digital quantity to the gain control unit, and automatically controlling the analog gain so as to achieve signal convergence in a short time, achieve synchronization of the ultra-wideband signal in a time domain and a frequency domain in a short time and ensure stability of signal transmission.
In addition, it should be noted that the received signal is taken as an ultra-wideband signal for explanation, and for understanding, the composition of the ultra-wideband signal needs to be explained.
As shown in FIG. 1, it is a structure diagram of an ultra-wideband physical layer packet and a Synchronization part in an IEEE 802.15.4 protocol, wherein a Synchronization part (SHR) is used to perform time domain and frequency domain Synchronization on a received signal, and a specific Synchronization part can be further subdivided into a Synchronization domain (SYNC) and a Frame Delimiter domain (SFD) and a Start of Frame Delimiter (T) pre For presetting the total time width, T, of the synchronisation portion SYNC For the time width occupied by the synchronisation field, T, of the total duration of the synchronisation portion SFD The time width occupied by the frame separator field in the total time length of the synchronous part is adopted, and continuous power detection is required to be carried out on the analog-to-digital conversion output signal in the synchronous field by the baseband, and the expression is as follows:
where N is the number of samples for power estimation, S re And S im Respectively the real and imaginary part of the analog-to-digital converted output signal. And prescribes ultra-wideband systems according to a protocolIn the manner of pulse communication, the position, polarity and interval of the synchronization field pulse are determined by the predefined preamble and preamble symbol interval.
As shown in fig. 2, is a transmission waveform of a preamble. However, in order to obtain reliable average power estimation, the time length of the baseband for channel estimation needs to be greater than twice the transmission time of a single preamble, so that in order to obtain a stable and fast-convergence ultra-wideband signal, it is necessary that the ultra-wideband signal can complete signal convergence and signal synchronization in a short time during signal transmission. Based on this, an embodiment of the present invention provides an automatic gain control method, as shown in fig. 3, the automatic gain control method specifically includes:
and S10, presetting a power threshold of the received signal.
In this embodiment, a power threshold of a received signal needs to be preset before a low noise amplifier in an analog front end outputs a power signal, where the power threshold is used to eliminate saturation in the analog front end, so that the analog front end can output an ideal power, and subsequent gain adjustment and gain iteration times are reduced, thereby achieving rapid convergence of the signal; by setting the power threshold, power signals which do not meet the gain adjustment can be filtered, and signal synchronization of broadband signals can be further completed within a short time.
And S11, judging whether the power of the received signal meets the power threshold or not based on the power threshold.
In this embodiment, the power threshold is an ideal power value preset in the control device by the user, and the power of the received signal needs to be equal to or less than a preset power value.
Optionally, the power threshold may also be an ideal power value table obtained through a priori knowledge, where a plurality of ideal power values are stored in the table, and each ideal power value corresponds to a corresponding scene, so as to complete signal convergence and signal synchronization in a short time, for example: when the power of the received signal exceeds the power threshold, the power value meeting the power overflow scenario can be extracted from the ideal power value table and set as the threshold.
In addition, the power threshold value can be set manually, and can also be automatically adjusted according to the received power value.
And S12, if the power of the received signal meets the power threshold, carrying out analog gain control according to the power of the received signal.
In this embodiment, the condition that the power of the received signal satisfies the power threshold may be that the received power signal is equal to or less than the power threshold, and when the power of the received signal satisfies the power threshold, the received power signal is an ideal power signal, and no obvious saturation distortion exists in the power signal.
The automatic gain control method provided by the embodiment of the invention obtains the more ideal power of the received signal by presetting the power threshold of the received signal, and then performs analog gain control by using the power of the received signal meeting the power threshold, thereby reducing the times of analog gain adjustment, realizing signal convergence in a shorter time, completing the synchronization of the ultra-wideband signal in a time domain and a frequency domain in a shorter time, and ensuring the stability of signal transmission.
Optionally, as shown in fig. 4, the automatic gain control method provided in the embodiment of the present invention, in addition to the steps S10 to S12, further includes:
and S13, if the power of the received signal does not meet the power threshold, adjusting the analog gain of the analog front end to enable the power of the received signal to meet the power threshold.
In this embodiment, if the output power of the low noise amplifier is greater than the preset threshold, it indicates that the low noise amplifier has saturation distortion, and the obtained initial power estimate is not accurate. Therefore, it is necessary to adjust the analog gain of the low noise amplifier through the gain control unit to eliminate distortion, obtain an ideal output power, ensure the accuracy of subsequent power estimation, and obtain a stable signal in a short time. For example: when the power of the received signal overflows the preset threshold value, the whole quantity needs to be increased through the gain control unit, and the preset threshold value is automatically adjusted, so that the power of the received signal can meet the threshold value, signal convergence can be rapidly and accurately completed, and signal output is stabilized.
Optionally, the presetting of the power threshold of the received signal includes: the power threshold of the received signal is set at the output of the low noise amplifier of the analog front end.
The embodiment of the present invention provides an automatic gain control method, specifically, before step S12, the method includes: and performing power amplification on the received signal based on the power of the received signal to obtain a power amplified signal of the received signal. And performing analog gain control by using the power amplification signal of the received signal.
In this embodiment, a power amplifier needs to be arranged in the analog front end to amplify the power of the received signal to ensure the stability of signal transmission, and then the amplified power signal of the received signal is sent to the gain control unit to perform analog gain control, thereby ensuring the accuracy of subsequent automatic gain control.
As shown in fig. 5, step S12 further includes:
and S121, performing analog-to-digital conversion based on the power of the received signal to obtain a power digital quantity of the received signal.
In this embodiment, after the analog front end outputs the power signal, in order to perform precise control and quantization management, it is necessary to convert the analog signal of the output power into a digital signal before sending the output power signal to the gain control unit, wherein an analog-to-digital converter may be used for the analog-to-digital conversion.
And S122, performing baseband power estimation on the obtained power digital quantity of the received signal to obtain a preset analog gain. In this embodiment, the digital power value of the received signal is sent to the gain control unit for baseband power estimation, thereby ensuring the accuracy of the subsequent automatic gain control.
And S123, adjusting the analog gain of the analog front end by using the preset analog gain or controlling the baseband power. In this embodiment, after obtaining the power digital quantity of the received signal, the power digital quantity needs to be subjected to baseband power estimation, and then the analog gain is adjusted according to the power estimation result. For example: and obtaining ideal analog gain after power estimation, and configuring the analog front end according to the obtained ideal analog gain, so that the received signal can meet a preset threshold after being subjected to gain, and the stability of signal transmission is ensured.
Optionally, after the automatic gain control of the gain control unit completes the adjustment of the gain of the low noise amplifier, the baseband performs power estimation again. At this point, since the saturation distortion of the analog front end has been removed, the baseband can directly set the gain of the analog front end based on the new power estimate:
RFgain＝P adcfull -P esti -PAPR-P margin
wherein RFgain is the analog gain to be set, P adcfull Is the signal power at full scale of the mode switching output, P esti Is a power estimate derived at baseband. The PAPR is the ratio of the peak power to the average power of the received signal. In addition, to eliminate errors in the power estimation, P margin As redundancy is added to the analog gain setting.
Therefore, the embodiment of the present invention obtains an ideal output power by setting the threshold value of the output power of the low noise amplifier in the analog front end, calculates the output power of the low noise amplifier according to the output power estimation of the analog-to-digital conversion, and keeps a certain output power of the low noise amplifier by adjusting the gain of the analog front end. And estimating the receiving power by utilizing a baseband to obtain an ideal gain adjustment value of the analog front end, and then setting the gain of the analog front end according to the gain adjustment value. The method has the advantages that: power estimation is not needed to be carried out at the analog front end, and meanwhile, the cost of the ultra-wideband receiver is reduced; accurate reception power values can be obtained by using baseband power estimation. In addition, compared with the traditional analog power estimation method, the method provided by the invention optimizes the iteration times and can directly set the analog gain at an optimal value. Therefore, for an ultra-wideband system with short transmission time, the method can quickly adjust the gain, so that the base band has sufficient time to perform subsequent received signal synchronization processing. In addition, the method can work normally no matter in a strong power input signal or in a weak power input signal environment, and the size of the gain value can be determined according to the actual output power.
An embodiment of the present invention provides an automatic gain control apparatus, as shown in fig. 6, the automatic gain control apparatus includes:
the presetting module 10 is configured to preset a power threshold of the received signal, and the details refer to the related description of step S10 of the above method embodiment.
The determining module 11 is configured to determine whether the power of the received signal meets the power threshold based on the power threshold, and refer to the related description of step S11 in the foregoing method embodiment for details.
A control module 12, configured to perform analog gain control according to the power of the received signal if the power of the received signal meets the power threshold, and refer to the related description of step S12 in the foregoing method embodiment for details.
Optionally, the automatic gain control apparatus may further include:
a control module 13, configured to perform analog gain control according to the power of the received signal if the power of the received signal meets the power threshold, and refer to the related description of step S13 in the foregoing method embodiment for details.
The automatic gain control device provided by the embodiment of the invention utilizes the preset module to preset the power threshold of the received signal, judges the power of the received signal and the power threshold in the preset module through the judgment module after the received signal is obtained, controls the analog gain through the control module when the power of the received signal meets the power threshold set in the preset module, adjusts the analog gain of the analog front end through the adjustment module when the power of the received signal does not meet the power threshold set in the preset module, firstly makes the power of the received signal meet the power threshold set by the preset module and then performs the analog gain control, thereby obtaining shorter automatic gain control convergence time and further completing the synchronization of the received signal in a time domain and a frequency domain according to the convergence time.
An embodiment of the present invention provides a receiver, as shown in fig. 7, the receiver includes:
the antenna 20 is configured to send a received ultra-wideband signal to the analog front end 21, the analog front end 21 receives the ultra-wideband signal while setting a threshold of the ultra-wideband signal, only the ultra-wideband signal meeting the threshold requirement is transmitted to the analog-to-digital converter 22, the analog-to-digital converter 22 converts the analog signal into a digital signal, and then the ultra-wideband signal converted into the digital signal is sent to the gain control unit 23 to perform automatic gain adjustment of the ultra-wideband signal, thereby achieving automatic gain adjustment in a shorter time and signal synchronization completion in a short time.
The embodiment of the invention also provides an ultra-wideband communication system, which is suitable for ultra-wideband signal communication, for example: and carrying out target positioning. It should be further noted that, as shown in fig. 8, the ultra-wideband communication system includes a receiving device 30 and a sending device 31, where the receiving device 30 may be a receiver, and the sending device 31 may be a signal transmitter, but both the receiving device 30 and the sending device 31 may include a processor 32 and a memory 33, where the processor 32 and the memory 33 may be connected by a bus or in other manners, and as shown in fig. 8, the connection by the bus is taken as an example.
The processor 32 may be a Central Processing Unit (CPU). The Processor 32 may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 33 is a non-transitory computer-readable storage medium, and can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as program instructions/modules (e.g., the default module 10, the determination module 11, and the control module 12 shown in fig. 6) corresponding to the automatic gain control method implemented by the automatic gain control apparatus according to the embodiment of the present invention. The processor 32 executes various functional applications and data processing of the processor by running non-transitory software programs, instructions and modules stored in the memory 33, namely, implementing the automatic gain control apparatus method in the above method embodiment.
The memory 33 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 32, and the like. Further, the memory 33 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 33 optionally includes memory located remotely from processor 32, which may be connected to processor 32 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 33 and, when executed by the processor 32, perform the automatic gain control method of the embodiment shown in fig. 1-5.
The details of the electronic device may be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to fig. 5, which are not described herein again.
Those skilled in the art will appreciate that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can include the processes of the embodiments of the methods described above when executed. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1. An automatic gain control method, comprising:
presetting a power threshold for simulating a front end receiving signal;
judging whether the power of the analog front end receiving signal meets the power threshold or not based on the power threshold;
if the power of the received signal meets the power threshold, performing analog gain control according to the power of the received signal;
if the power of the received signal meets the power threshold, performing analog gain control according to the power of the received signal, including:
performing analog-to-digital conversion based on the power of the received signal to obtain a power digital quantity of the received signal;
performing baseband power estimation on the power digital quantity of the received signal to obtain a preset analog gain;
adjusting the analog gain of the analog front end by using the preset analog gain or controlling the baseband power;
after the automatic gain control of the gain control unit finishes the adjustment of the gain of the low noise amplifier, the baseband carries out power estimation again; at this point, since the saturation distortion of the analog front end has been removed, the baseband can directly set the gain of the analog front end based on the new power estimate:
RFgain＝P adcfull -P esti -PAPR-P margin
wherein RFgain is the analog gain to be set, P adcfull Is the signal power at full scale of the mode switching output, P esti Is a power estimate derived from the baseband; PAPR is the ratio of the peak power to the average power of the received signal; in addition, to eliminate errors in the power estimation, P margin As redundancy is added to the analog gain setting.
2. The method of claim 1, wherein if the power of the received signal does not satisfy the power threshold, adjusting an analog gain of an analog front end such that the power of the received signal satisfies the power threshold.
3. The method of claim 1, wherein presetting the power threshold of the received signal comprises: the power threshold of the received signal is set at the output of the low noise amplifier of the analog front end.
4. The method of claim 1, prior to said performing analog gain control based on the power of the received signal, comprising:
performing power amplification on the received signal based on the power of the received signal to obtain a power amplified signal of the received signal;
and performing analog gain control by using the power amplification signal of the received signal.
5. An automatic gain control apparatus, comprising:
the device comprises a presetting module, a power control module and a power control module, wherein the presetting module is used for presetting a power threshold of an analog front end receiving signal;
the judging module is used for judging whether the power of the analog front end receiving signal meets the power threshold or not based on the power threshold;
the control module is used for carrying out analog gain control according to the power of the received signal if the power of the received signal meets the power threshold;
if the power of the received signal meets the power threshold, performing analog gain control according to the power of the received signal, including:
performing analog-to-digital conversion based on the power of the received signal to obtain a power digital quantity of the received signal;
performing baseband power estimation on the power digital quantity of the received signal to obtain a preset analog gain;
adjusting the analog gain of the analog front end by using the preset analog gain or controlling the baseband power;
after the automatic gain control of the gain control unit finishes the adjustment of the gain of the low noise amplifier, the baseband carries out power estimation again; at this point, since the saturation distortion of the analog front end has been removed, the baseband can directly set the gain of the analog front end based on the new power estimate:
RFgain＝P adcfull -P esti -PAPR-P margin
wherein RFgain is the analog gain to be set, P adcfull Is the signal power at full scale, P, of the mode switching output esti Is a power estimate derived from the baseband; PAPR is the ratio of the peak power to the average power of the received signal; in addition, to eliminate errors in the power estimation, P margin As redundancy is added to the analog gain setting.
6. The apparatus of claim 5, comprising:
and the adjusting module is used for adjusting the analog gain of the analog front end to enable the power of the received signal to meet the power threshold if the power of the received signal does not meet the power threshold.
7. A receiver, comprising: the automatic gain control apparatus of any one of claims 5 to 6, adapted to perform the automatic gain control method of any one of claims 1 to 4.
8. An ultra-wideband communication system, comprising: the receiver of claim 7.
9. A computer-readable storage medium storing computer instructions for causing a computer to perform the automatic gain control method according to any one of claims 1 to 4.
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| CN202110190380.XA CN113014282B (en) | 2021-02-18 | 2021-02-18 | Automatic gain control method, device, receiver and ultra-wideband communication system |
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| CN202110190380.XA CN113014282B (en) | 2021-02-18 | 2021-02-18 | Automatic gain control method, device, receiver and ultra-wideband communication system |
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| CN102821453A (en) * | 2012-08-28 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for regulating and controlling automatic gains for eliminating GSM (global system for mobile communication) and LTE (long term evolution) interference of MSR (multi-standard radio) receiver |
| CN109314935A (en) * | 2016-06-23 | 2019-02-05 | 华为技术有限公司 | A kind of method and apparatus automatically controlling gain |
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| US7127222B2 (en) * | 2002-09-26 | 2006-10-24 | Broadcom Corporation | Automatic gain control adjustment of a radio receiver |
| TWI288537B (en) * | 2003-06-20 | 2007-10-11 | Realtek Semiconductor Corp | Automatic gain control and antenna diversity method of wireless communication system |
| US7885627B2 (en) * | 2003-07-07 | 2011-02-08 | Advanced Micro Devices, Inc. | Optimal initial gain selection for wireless receiver |
| CN102857246B (en) * | 2012-09-17 | 2015-01-21 | 泰凌微电子（上海）有限公司 | Automatic gain control method and apparatus of constant envelope receiver |
| CN104954033B (en) * | 2015-05-29 | 2017-07-28 | 复旦大学 | A kind of speed automatic gain for ofdm system controls circuit and method |
| CN110324054A (en) * | 2019-06-20 | 2019-10-11 | 上海华虹集成电路有限责任公司 | A kind of auto gain control method of digital communication receiver |
| CN111162808A (en) * | 2019-12-31 | 2020-05-15 | 京信通信系统（中国）有限公司 | Radio frequency receiving circuit, receiver and base station |
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| CN102821453A (en) * | 2012-08-28 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for regulating and controlling automatic gains for eliminating GSM (global system for mobile communication) and LTE (long term evolution) interference of MSR (multi-standard radio) receiver |
| CN109314935A (en) * | 2016-06-23 | 2019-02-05 | 华为技术有限公司 | A kind of method and apparatus automatically controlling gain |
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