CN116233992A - Digital automatic gain control method, digital automatic gain control device, electronic equipment and storage medium - Google Patents
Digital automatic gain control method, digital automatic gain control device, electronic equipment and storage medium Download PDFInfo
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- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- H04B—TRANSMISSION
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Abstract
The invention provides a digital automatic gain control method, a device, electronic equipment and a storage medium, and relates to the technical field of communication, wherein the method comprises the following steps: determining a target timing time scale when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot of a target signal sent by the receiving base station; converting the time domain data sequence into a frequency domain data sequence based on the target timing time scale; the time domain data sequence is a data sequence corresponding to a target timing time scale; and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence. According to the digital automatic gain control method provided by the invention, after synchronization is completed, the signal is converted from the time domain to the frequency domain, and the pilot signal is utilized to carry out power statistics on the frequency domain, so that the accuracy of power statistics is improved, the pilot signal can also be used for carrying out channel estimation and equalization operation, the communication overhead is not occupied, and the communication efficiency is improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a digital automatic gain control method, a digital automatic gain control device, an electronic device, and a storage medium.
Background
A receiver in a wireless communication system receives data transmitted by users or base stations with different distances, the power of the received data is large or small, and the excessive data power can cause signal distortion to influence baseband demodulation and decoding; the data power is too small, the dynamic range of the intermediate node processing of the baseband processing becomes small, and the demodulation and decoding of the baseband can be affected.
The digital automatic gain control is to ensure that the power of the data entering the baseband demodulation and decoding is in a proper range interval, so as to obtain the optimal demodulation and decoding effect.
The prior art scheme is usually to adjust the time domain data power by using time domain statistical power and open loop or closed loop. In the existing timing time domain automatic gain control method, after the timing synchronization of a receiving system, a preset automatic gain control (Automatic Gain Control, AGC) training sequence is extracted at a periodic time node, and the power of the current received data is estimated by the AGC training sequence. Then decides, acts (amplifies (gains) or reduces (fades) or maintains) on the currently received data. The method is only suitable for a single carrier communication system, and the communication efficiency is lower at the cost of inserting the AGC training sequence.
Disclosure of Invention
Aiming at the problems existing in the prior art, the embodiment of the invention provides a digital automatic gain control method, a digital automatic gain control device, electronic equipment and a storage medium.
The invention provides a digital automatic gain control method, which comprises the following steps:
determining a target timing time scale when synchronization with the base station is completed; the target timing time scale is used for indicating a time slot for receiving a target signal;
converting the time domain data sequence into a frequency domain data sequence based on the target timing time stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
In some embodiments, before the automatic gain control processing is performed on the target signal based on the pilot signal extracted from the frequency domain data sequence, the method further includes:
determining a target frequency domain data sequence from the frequency domain data sequences; the target frequency domain data sequence comprises a pilot signal and user data;
and extracting the pilot signal based on the target frequency domain data sequence.
In some embodiments, the performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence includes:
determining a power or amplitude of the pilot signal based on the pilot signal;
and performing automatic gain control processing on the target signal based on the power or amplitude of the pilot signal.
In some embodiments, the performing automatic gain control processing on the target signal based on the power or the amplitude of the pilot signal includes:
determining an adjustment factor based on the power or amplitude of the pilot signal; the adjustment factor includes a gain factor or an attenuation factor;
and performing automatic gain control processing on the target signal based on the adjustment factor.
In some embodiments, the determining an adjustment factor based on the power or amplitude of the pilot signal comprises:
determining a power average or an amplitude average of the frequency domain data sequence based on the power or the amplitude of the pilot signal;
the adjustment factor is determined based on the power average or amplitude average.
In some embodiments, the converting the time domain data sequence to the frequency domain data sequence based on the target timing stamp comprises:
determining a time domain data sequence corresponding to the target timing time stamp based on the target timing time stamp;
the time domain data sequence is converted into a frequency domain data sequence based on a fast fourier transform method.
In some embodiments, before determining the target timing time stamp, if synchronization with the base station is completed, the method further comprises:
receiving a broadcast signal sent by the base station; the broadcast signal is used for synchronization;
and attenuating the power of the broadcast signal under the condition that the broadcast signal is determined to be saturated based on the power of the broadcast signal.
The invention also provides a digital automatic gain control device, which comprises:
a determining module, configured to determine a target timing time stamp when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station;
the conversion module is used for converting the time domain data sequence into a frequency domain data sequence based on the target timing time scale; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and the control module is used for carrying out automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, the processor implementing the digital automatic gain control method as described in any one of the above when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a digital automatic gain control method as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a digital automatic gain control method as described in any one of the above.
According to the digital automatic gain control method, the digital automatic gain control device, the electronic equipment and the storage medium, after synchronization is completed, the signals are converted from the time domain to the frequency domain, and the pilot signals are utilized to carry out power statistics on the frequency domain, so that the accuracy of power statistics is improved, the pilot signals can also be used for carrying out channel estimation and equalization operation, communication overhead is not occupied, and the communication efficiency is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a digital automatic gain control method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of attenuating a broadcast signal according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of power adjustment provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of the synchronization of gain factors with a target timing time scale provided by an embodiment of the present invention;
fig. 5 is a flowchart of a method for determining power of a pilot signal according to an embodiment of the present invention;
FIG. 6 is a second flowchart of a digital automatic gain control method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a digital automatic gain control device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.
Fig. 1 is one of flow diagrams of a digital automatic gain control method according to an embodiment of the present invention, and as shown in fig. 1, the digital automatic gain control method according to an embodiment of the present invention includes:
102, converting the time domain data sequence into a frequency domain data sequence based on the target timing time scale; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and 103, performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
In step 101, determining a target timing stamp if synchronization with the base station is completed; the target timing time stamp is used to indicate a time slot in which the target signal transmitted by the base station is received.
After the User Equipment (UE) is powered on, the UE will establish connection by receiving signals sent by the base station and sending signals to the base station; the uplink signal refers to a signal sent by the UE and received by the base station; the downlink signal refers to a signal sent by the base station and received by the UE.
After receiving the broadcast signal sent by the base station, the base station is synchronized with the broadcast signal. After synchronization is completed, the gaps in the transmission process of the uplink signal and the downlink signal are consistent, so that the UE can determine a time slot for receiving a target signal, that is, a target timing time stamp, which is a time stamp aligned with a time slot in the wireless communication system, and the target signal can be any signal transmitted by the base station.
In some embodiments, before determining the target timing time stamp, if synchronization with the base station is completed, the method further comprises:
receiving a broadcast signal sent by the base station; the broadcast signal is used for synchronization;
and attenuating the power of the broadcast signal under the condition that the broadcast signal is determined to be saturated based on the power of the broadcast signal.
Before synchronization is completed, namely in the initial stage of power-on, broadcast signals in a range with a larger power range can be correctly received due to high redundancy of the broadcast signals.
Thus, a rough gain adjustment strategy can be implemented for the reception of the broadcast signal prior to synchronization, blind statistics of the power or amplitude of the time domain, and attenuation of the power of the broadcast signal if overflow saturation occurs.
For example, a time window of a length may be randomly selected to sample the power or amplitude of multiple sampling points of the broadcast signal.
Optionally, through a preset threshold, according to the power or the amplitude of the sampling point, whether the power of the broadcast signal is greater than the preset threshold is judged, when the power of the broadcast signal is greater than the preset threshold, the condition that the signal is saturated or overflows is judged, and the whole broadcast signal is attenuated.
The threshold range can also be preset, and whether the power of the broadcast signal is in the preset range is judged according to the power or the amplitude of the sampling point. Attenuating the power of the broadcast signal in case of excessive power (i.e., greater than a preset threshold range); amplifying the power of the broadcast signal in case of too little power (i.e. less than a preset threshold range); in the case of moderate power (i.e. in a preset threshold range), the power of the broadcast signal is maintained unchanged.
After the power of the broadcast signal is adjusted, the adjusted broadcast signal is obtained, and the power corresponding to the adjusted broadcast signal is located in a preset range, so that AGC adjustment oscillation caused by statistical fluctuation can be avoided.
Fig. 2 is a schematic diagram of attenuating a broadcast signal according to an embodiment of the present invention, where each upward line, as shown in fig. 2, represents a power corresponding to each sampling point in the broadcast signal, and a dashed line represents a preset threshold. The broadcast signal before attenuation is shown on the left side of fig. 2, and the broadcast signal after attenuation is shown on the right side.
The embodiment of the invention provides a rough gain adjustment strategy before synchronization, blindly counts time domain power or amplitude, and if overflow saturation exists, attenuates broadcast signals, thereby avoiding AGC adjustment oscillation caused by statistical fluctuation.
Converting the time domain data sequence into a frequency domain data sequence based on the target timing stamp in step 102; the time domain data sequence is a data sequence corresponding to the target timing stamp.
After the synchronization is completed, a time slot for receiving the target signal may be determined, and a corresponding time domain data sequence may be extracted according to the time slot.
It will be appreciated that the target timing stamp corresponds to the time slot in which the target signal was received, as does the time domain data sequence.
In some embodiments, the converting the time domain data sequence to the frequency domain data sequence based on the target timing stamp comprises:
determining a time domain data sequence corresponding to the target timing time stamp based on the target timing time stamp;
the time domain data sequence is converted into a frequency domain data sequence based on a fast fourier transform method.
According to the target timing time mark, a target signal corresponding to the target timing time mark and a time domain data sequence corresponding to the target timing time mark can be determined, and the number of the time domain data sequences can be multiple.
Each time domain data sequence may be converted into a corresponding frequency domain data sequence according to a fast fourier transform (Fast Fourier Transform, FFT) method.
In step 103, an automatic gain control process is performed on the target signal based on the pilot signal extracted from the frequency domain data sequence.
Corresponding pilot signals are extracted from each frequency domain data sequence, the number of the pilot signals can be multiple, and the power or amplitude of each pilot signal is counted, namely, the power statistics is carried out on the frequency domain, the power on the frequency domain is relatively stable, and the accuracy of the power statistics is improved.
The pilot signal is the signal agreed by the receiving party and the transmitting party in the communication system, and the receiving party can adopt the pilot signal to perform channel estimation and equalization operation, namely, the pilot signal is utilized, so that the communication overhead is not occupied, and the communication efficiency is improved.
In some embodiments, before the automatic gain control processing is performed on the target signal based on the pilot signal extracted from the frequency domain data sequence, the method further includes:
determining a target frequency domain data sequence from the frequency domain data sequences; the target frequency domain data sequence comprises a pilot signal and user data;
and extracting the pilot signal based on the target frequency domain data sequence.
Alternatively, the target frequency domain data sequence may be determined from among the frequency domain data sequences, the target frequency domain data sequence being a valid frequency domain data sequence including the pilot signal and the user data.
Thereby extracting pilot signals of the target frequency domain data sequence, namely obtaining effective pilot signals, wherein the number of the pilot signals can be multiple.
In some embodiments, the performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence includes:
determining a power or amplitude of the pilot signal based on the pilot signal;
and performing automatic gain control processing on the target signal based on the power or amplitude of the pilot signal.
By calculating the power or amplitude of each pilot signal, it can be determined whether the power of the target signal is too high or too low, thereby performing automatic gain control processing on the target signal.
In some embodiments, the performing automatic gain control processing on the target signal based on the power or the amplitude of the pilot signal includes:
determining an adjustment factor based on the power or amplitude of the pilot signal; the adjustment factor includes a gain factor or an attenuation factor;
and performing automatic gain control processing on the target signal based on the adjustment factor.
In some embodiments, the determining an adjustment factor based on the power or amplitude of the pilot signal comprises:
determining a power average or an amplitude average of the frequency domain data sequence based on the power or the amplitude of the pilot signal;
the adjustment factor is determined based on the power average or amplitude average.
And calculating a power average value or an amplitude average value of the frequency domain data sequence according to the power or the amplitude of each pilot signal, thereby determining an adjustment factor according to the power average value or the amplitude average value.
The adjustment factors comprise gain factors or attenuation factors, and the power of the target signal is enhanced or attenuated in the time domain according to the adjustment factors, so that the power of the target signal is in a steady-state interval, and automatic gain control processing is carried out on the target signal. Wherein the effect of the adjustment factor is synchronized with the target timing stamp, i.e. the adjustment factor cannot be changed between the two stamps.
In addition, the target signal may be periodically counted and periodically adjusted according to the target location time stamp.
Fig. 3 is a schematic diagram of power adjustment provided by the embodiment of the present invention, as shown in fig. 3, when the power of the target signal is too low, the adjustment step is 6dB, the adjustment range is 6×mdb, m is generally set to 6-8, i.e. the adjustment range is 36 dB-48 dB; when the power of the target signal is too high, the adjusting range is 6 dB-12 dB.
Fig. 4 is a schematic diagram of the gain factor provided by an embodiment of the present invention being synchronized with a target timing mark, as shown in fig. 4, the effect of the adjustment factor being synchronized with the target timing mark, i.e., the gain factor cannot be changed between the two marks.
Optionally, fig. 5 is a flowchart of a method for determining the power of a pilot signal according to an embodiment of the present invention, as shown in fig. 5, where the method for determining the power of the pilot signal according to the embodiment of the present invention includes:
s1, after synchronization is carried out according to a broadcast signal, a target timing time mark is determined, and a time domain data sequence 1,2 and … to be converted are extracted according to the target timing time mark;
s2, the number of time domain data sequences is N, where N is the FFT conversion length, and is typically 256, 512, 1024, 2048, 4096, etc.;
s3, converting the time domain data sequence into a frequency domain data sequence;
s4, extracting a target frequency domain data sequence from the frequency domain data sequence, namely an effective frequency domain data sequence, wherein the target frequency domain data sequence comprises pilot signals and user data, the length of the target frequency domain data sequence is N-G=N (0.6-0.8), and G=N (0.2-0.4); g represents the number of points of guard bands on the frequency domain data sequence;
s5, extracting pilot signals from the target frequency domain data sequence, wherein the number of the effective pilot signals is (N-G)/L, wherein L represents an interval, and the value of L is 6 or 3;
s6, the pilot signal is expressed as follows:
P=I+j*Q
where P represents the pilot signal, I represents the real part, and Q represents the imaginary part.
The Power of the single pilot signal is s_power=i 2 +Q 2 Amplitude is ABS (P) =sqrt (I 2 +Q 2 )。
S7, calculating the power average value or the amplitude average value of the pilot signal.
According to the digital automatic gain control method provided by the embodiment of the invention, after synchronization is completed, the signal is converted from the time domain to the frequency domain, and the pilot signal is utilized to carry out power statistics on the frequency domain, so that the accuracy of power statistics is improved, the pilot signal can also be used for carrying out channel estimation and equalization operation, the communication overhead is not occupied, and the communication efficiency is improved.
Fig. 6 is a second flowchart of a digital automatic gain control method according to an embodiment of the present invention, as shown in fig. 6, where the digital automatic gain control method according to the embodiment of the present invention includes:
before synchronization, broadcast signals in a range with a larger power range can be correctly received due to high redundancy of the broadcast signals. Thus, a coarse gain adjustment strategy can be implemented for the reception of the broadcast signal prior to synchronization, blind statistics of time domain power or amplitude, and attenuation of the power of the broadcast signal if there is overflow saturation.
I.e. the power-on is initiated, the rough adjustment mode is performed before synchronization, only the large signal (signal saturation overflow) is attenuated, and adjustment oscillation caused by statistics is avoided.
After synchronization, a target timing time mark is found, and the corresponding time domain data sequence is converted (FFT operation) into a frequency domain data sequence according to the position of the target timing time mark; extracting pilot signals at positions corresponding to the frequency domain data sequences, and counting average power or amplitude values of the pilot signals; and obtaining an attenuation factor or a gain factor according to the average power or the amplitude value, and carrying out attenuation or gain adjustment.
After synchronization, the signal is converted from time domain to frequency domain, and specific pilot frequency reference signal with relatively stable power (current data segment) is extracted in the frequency domain, so that fluctuation of statistical power of blind test is avoided, and communication efficiency is not sacrificed. The specific pilot reference signal is generally existed in the communication system, and the receiving and transmitting parties agree that the receiving party adopts the pilot signal to carry out channel estimation and equalization operation, thus the success rate of demodulation and decoding of the signal can be improved.
According to the digital automatic gain control method provided by the embodiment of the invention, a rough adjustment mode before synchronization only attenuates a large signal (signal saturation overflow), counts the overflow (saturation) of a sample, avoids AGC adjustment oscillation caused by statistical fluctuation, converts a signal from a time domain to a frequency domain after synchronization, extracts a specific pilot frequency reference signal with relatively stable power (current data segment) in the frequency domain, and not only avoids fluctuation of blind test statistical power, but also does not sacrifice communication efficiency.
The digital automatic gain control device provided by the invention is described below, and the digital automatic gain control device described below and the digital automatic gain control method described above can be referred to correspondingly.
Fig. 7 is a schematic structural diagram of a digital automatic gain control device according to an embodiment of the present invention, and as shown in fig. 7, the digital automatic gain control device according to an embodiment of the present invention includes:
a determining module 710 for determining a target timing stamp if synchronization with the base station is completed; the target timing time mark is used for indicating a time slot of a received target signal sent by the base station;
a conversion module 720, configured to convert the time domain data sequence into a frequency domain data sequence based on the target timing stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and a control module 730, configured to perform automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
It should be noted that, the digital automatic gain control device provided in this embodiment of the present invention can implement all the method steps implemented in the foregoing digital automatic gain control method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted.
Optionally, the method further comprises: an extraction module for:
determining a target frequency domain data sequence from the frequency domain data sequences; the target frequency domain data sequence comprises a pilot signal and user data;
and extracting the pilot signal based on the target frequency domain data sequence.
Optionally, the control module 730 is specifically configured to:
determining a power or amplitude of the pilot signal based on the pilot signal;
and performing automatic gain control processing on the target signal based on the power or amplitude of the pilot signal.
Optionally, the control module 730 is specifically configured to:
determining an adjustment factor based on the power or amplitude of the pilot signal; the adjustment factor includes a gain factor or an attenuation factor;
and performing automatic gain control processing on the target signal based on the adjustment factor.
Optionally, the control module 730 is specifically configured to:
determining a power average or an amplitude average of the frequency domain data sequence based on the power or the amplitude of the pilot signal;
the adjustment factor is determined based on the power average or amplitude average.
Optionally, the conversion module 720 is specifically configured to:
determining a time domain data sequence corresponding to the target timing time stamp based on the target timing time stamp;
the time domain data sequence is converted into a frequency domain data sequence based on a fast fourier transform method.
Optionally, the method further comprises: a receiving module for:
receiving a broadcast signal sent by the base station; the broadcast signal is used for synchronization;
and attenuating the power of the broadcast signal under the condition that the broadcast signal is determined to be saturated based on the power of the broadcast signal.
Fig. 8 illustrates a physical structure diagram of an electronic device, as shown in fig. 8, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a digital automatic gain control method comprising: determining a target timing time scale when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station; converting the time domain data sequence into a frequency domain data sequence based on the target timing time stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale; and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the digital automatic gain control method provided by the above methods, the method comprising: determining a target timing time scale when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station; converting the time domain data sequence into a frequency domain data sequence based on the target timing time stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale; and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the digital automatic gain control method provided by the above methods, the method comprising: determining a target timing time scale when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station; converting the time domain data sequence into a frequency domain data sequence based on the target timing time stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale; and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A digital automatic gain control method, comprising:
determining a target timing time scale when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station;
converting the time domain data sequence into a frequency domain data sequence based on the target timing time stamp; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and performing automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
2. The method according to claim 1, wherein before the automatic gain control processing is performed on the target signal based on the pilot signal extracted from the frequency domain data sequence, further comprising:
determining a target frequency domain data sequence from the frequency domain data sequences; the target frequency domain data sequence comprises a pilot signal and user data;
and extracting the pilot signal based on the target frequency domain data sequence.
3. The digital automatic gain control method of claim 1 wherein said performing automatic gain control processing on said target signal based on a pilot signal extracted from said frequency domain data sequence comprises:
determining a power or amplitude of the pilot signal based on the pilot signal;
and performing automatic gain control processing on the target signal based on the power or amplitude of the pilot signal.
4. The method according to claim 3, wherein the performing automatic gain control processing on the target signal based on the power or the amplitude of the pilot signal comprises:
determining an adjustment factor based on the power or amplitude of the pilot signal; the adjustment factor includes a gain factor or an attenuation factor;
and performing automatic gain control processing on the target signal based on the adjustment factor.
5. The method of digital automatic gain control of claim 4, wherein said determining an adjustment factor based on a power or amplitude of said pilot signal comprises:
determining a power average or an amplitude average of the frequency domain data sequence based on the power or the amplitude of the pilot signal;
the adjustment factor is determined based on the power average or amplitude average.
6. The digital automatic gain control method of claim 1 wherein said converting a time domain data sequence into a frequency domain data sequence based on said target timing stamp comprises:
determining a time domain data sequence corresponding to the target timing time stamp based on the target timing time stamp;
the time domain data sequence is converted into a frequency domain data sequence based on a fast fourier transform method.
7. The method according to claim 1, wherein the determining the target timing time stamp before the synchronization with the base station is completed further comprises:
receiving a broadcast signal sent by the base station; the broadcast signal is used for synchronization;
and attenuating the power of the broadcast signal under the condition that the broadcast signal is determined to be saturated based on the power of the broadcast signal.
8. A digital automatic gain control apparatus, comprising:
a determining module, configured to determine a target timing time stamp when synchronization with the base station is completed; the target timing time mark is used for indicating a time slot for receiving a target signal sent by the base station;
the conversion module is used for converting the time domain data sequence into a frequency domain data sequence based on the target timing time scale; the time domain data sequence is a data sequence corresponding to the target timing time scale;
and the control module is used for carrying out automatic gain control processing on the target signal based on the pilot signal extracted from the frequency domain data sequence.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor implements the digital automatic gain control method of any one of claims 1 to 7 when the program is executed by the processor.
10. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the digital automatic gain control method according to any of claims 1 to 7.
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