CN115276713B - Signal processing method, apparatus, computer device and storage medium - Google Patents
Signal processing method, apparatus, computer device and storage medium Download PDFInfo
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- CN115276713B CN115276713B CN202110477105.6A CN202110477105A CN115276713B CN 115276713 B CN115276713 B CN 115276713B CN 202110477105 A CN202110477105 A CN 202110477105A CN 115276713 B CN115276713 B CN 115276713B
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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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
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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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
- H04J3/0617—Systems characterised by the synchronising information used the synchronising signal being characterised by the frequency or phase
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application relates to a signal processing method, a signal processing device, a computer device and a storage medium. The method comprises the following steps: respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; carrying out in-band frequency sub-band spectrum shifting treatment on each first processing signal to obtain a second processing signal corresponding to each first processing signal; carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal; determining the interfered sub-carrier in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier to zero, and adding the sub-carriers with the energy set to zero to obtain a target soft information signal corresponding to each sub-band; performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is an interference-removed synchronization signal. The method can ensure the robustness of the received synchronous signals.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal processing method, an apparatus, a computer device, and a storage medium.
Background
The synchronous waveform in wireless communication is the basis of wireless network data communication, especially in a Time Division Duplex (TDD) system, the signal synchronization can determine the receiving and transmitting time position of a communication node, and the receiving and transmitting collision of multi-user nodes is avoided. Therefore, the correct and reliable reception of the synchronization waveform is a precondition for whether the network communication can be normally established, and is one of key factors for improving the network communication performance.
In the conventional technology, frequency hopping is generally adopted, and interference signals in the synchronous signals are resisted to a certain extent through frequency hopping, so that synchronous and reliable receiving of synchronous waveforms is ensured.
However, the conventional method for processing the interference signal in the synchronization signal has a problem of poor robustness.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a signal processing method, apparatus, computer device, and storage medium capable of ensuring robustness of processing an interference signal in a synchronization signal.
A method of signal processing, the method comprising:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining interfered subcarriers in baseband synchronous signals corresponding to the subbands, setting the energy of the interfered subcarriers to zero, and adding all the subcarriers with the energy set to zero to obtain target soft information signals corresponding to the subbands;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
In one embodiment, the determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band includes:
and determining the interfered subcarriers in the baseband synchronous signals corresponding to the subbands according to the signal-to-noise ratio of the subcarriers of the baseband synchronous signals corresponding to the subbands.
In one embodiment, the determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band according to the signal to noise ratio of each sub-carrier of the baseband synchronization signal corresponding to each sub-band includes:
comparing the signal-to-noise ratio of each subcarrier of the baseband synchronous signal corresponding to each subband with a preset threshold;
and determining the subcarriers of which the signal to noise ratios of the subcarriers of the baseband synchronizing signals corresponding to the subbands are smaller than the preset threshold value as the interfered subcarriers in the baseband synchronizing signals corresponding to the subbands.
In one embodiment, the performing joint decoding on each of the target soft information signals to obtain a target synchronization signal includes:
demodulating each target soft information signal to obtain a demodulated target soft information signal;
and carrying out joint decoding on the demodulated target soft information signals to obtain the target synchronous signals.
In one embodiment, the synchronization signal is a frequency hopping processed signal.
In one embodiment, the more interfered subcarriers correspond to lower signal-to-noise ratios.
In one embodiment, a center frequency point of each sub-band of each of the second processing signals is 0.
A signal processing apparatus, the apparatus comprising:
the first processing module is used for respectively carrying out overall frequency spectrum shifting processing on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
the second processing module is used for carrying out in-band frequency sub-band frequency spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
the filtering module is used for carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
the third processing module is used for determining the interfered sub-carrier wave in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier wave to zero, and adding all sub-carrier waves with the energy set to zero to obtain a target soft information signal corresponding to each sub-band;
the fourth processing module is used for carrying out joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
A computer device comprising a memory storing a computer program and a processor which when executing the computer program performs the steps of:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining interfered subcarriers in baseband synchronous signals corresponding to the subbands, setting the energy of the interfered subcarriers to zero, and adding all the subcarriers with the energy set to zero to obtain target soft information signals corresponding to the subbands;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining interfered subcarriers in baseband synchronous signals corresponding to the subbands, setting the energy of the interfered subcarriers to zero, and adding all the subcarriers with the energy set to zero to obtain target soft information signals corresponding to the subbands;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
According to the signal processing method, the device, the computer equipment and the storage medium, through carrying out overall frequency spectrum shifting processing on the synchronous signals received at each moment in a preset time period, the obtained plurality of first processing signals are signals with zero center frequency points, and then carrying out in-band frequency sub-band frequency spectrum shifting processing on each first processing signal, so that second processing signals corresponding to each first processing signal can be obtained, the center frequency point of a sub-band of each obtained second processing signal is zero, and then the interfered sub-carrier in the baseband synchronous signals corresponding to each sub-band of each second processing signal can be determined, the energy of the interfered sub-carrier is set to zero, and all sub-carriers after the energy is set to zero can be added to obtain target soft information signals corresponding to each sub-band, and then the target soft information signals can be combined to obtain the target synchronous signals with interference removed.
Drawings
FIG. 1 is a diagram of an application environment for a signal processing method in one embodiment;
FIG. 2 is a flow chart of a method of signal processing in one embodiment;
FIG. 2a is a flow chart illustrating a method of signal processing according to one embodiment;
FIG. 2b is a flow chart illustrating a method of signal processing according to one embodiment;
FIG. 2c is a schematic diagram of a signal processing method in one embodiment;
FIG. 3 is a flow chart illustrating a method of processing signals in one embodiment
FIG. 4 is a block diagram of a signal processing device in one embodiment;
fig. 5 is an internal structural view of a terminal in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The signal processing method provided by the application can be applied to an application environment shown in fig. 1. Wherein the transmitting end 102 communicates with the terminal 104 through wireless communication. The transmitting end 102 may send a communication signal to the receiving end in real time, and the terminal 104 receives the communication signal sent by the transmitting end 102 in real time.
In one embodiment, as shown in fig. 2, a signal processing method is provided, and the method is applied to the terminal in fig. 1 for illustration, and includes the following steps:
s201, respectively carrying out overall frequency spectrum shifting processing on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals. The synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
the spectrum shifting refers to a process of converting a synchronization signal into a zero frequency signal. Specifically, the terminal performs overall spectrum shifting processing on the synchronization signals received at each moment in a preset time period to obtain a plurality of first processing signals. The received synchronous signal is a signal sent by a sending end by adopting a time division repetition method. The terminal performs the overall spectrum shifting process on the synchronization signals received at each time in the preset time period, and converts the synchronization signals received at each time in the preset time period into zero frequency signals. Optionally, each time in the preset time period may include f1, f2, … … fn, n times. For example, the overall spectrum shifting process performed by the terminal on the synchronization signals received at each time in the preset period may be as shown in fig. 2a (it should be noted that the schematic diagram shown in fig. 2a is only illustrated by taking the first processing signal obtained at one time as an example).
S202, carrying out in-band frequency sub-band spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal.
Specifically, the terminal performs in-band frequency sub-band spectrum shifting processing on each obtained first processing signal to obtain a second processing signal corresponding to each first processing signal. Optionally, the center frequency point of each subband of each obtained second processing signal is 0. The in-band subband spectrum shifting process for each first processed signal is to shift the subband signal in each first processed signal (i.e., zero frequency signal) to zero frequency.
And S203, carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal.
Specifically, the terminal performs low-pass filtering on each subband of each obtained second processing signal to obtain a baseband synchronization signal corresponding to each subband of each second processing signal. Optionally, the terminal may perform low-pass filtering on each subband of each second processing signal through a preset low-pass filter, so as to obtain a baseband synchronization signal corresponding to each subband of each second processing signal.
S204, determining the interfered sub-carrier wave in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier wave to zero, and adding the sub-carrier waves with the energy set to zero to obtain the target soft information signal corresponding to each sub-band.
Specifically, the terminal determines the interfered sub-carrier wave in the baseband synchronous signal corresponding to each sub-band from the baseband synchronous signal corresponding to each sub-band of each second processing signal, sets the energy of the interfered sub-carrier wave in the baseband synchronous signal corresponding to each determined sub-band to zero, and adds the sub-carrier waves with the energy set to zero to obtain the target soft information signal corresponding to each sub-band. Optionally, the terminal may determine, according to the signal-to-noise ratio of each subcarrier of the baseband synchronization signal corresponding to each subband, the subcarrier that is interfered in the baseband synchronization signal corresponding to each subband. Optionally, the terminal may determine the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band according to the frequency of each sub-carrier of the baseband synchronization signal corresponding to each sub-band. As shown in fig. 2b, the black columns in fig. 2b represent the above-mentioned determination of the interfered sub-carriers in the baseband synchronization signal corresponding to each sub-band.
S205, carrying out joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is an interference-removed synchronization signal.
Specifically, the terminal performs joint decoding on each target soft information signal to obtain a target synchronous signal. It will be appreciated that each target soft information signal obtained has set the energy of the interfered sub-carrier to zero, and thus the target synchronization signal obtained is the synchronization signal from which the interference is removed.
In order to facilitate understanding of the above signal processing method by those skilled in the art, as shown in fig. 2c, fig. 2c illustrates the principle of the signal processing method provided in the present application, and for a detailed explanation in fig. 2c, reference is continued to the descriptions in S201-S205.
In the signal processing method, the synchronization signals received at each moment in the preset time period are respectively subjected to overall frequency spectrum shifting processing, so that the obtained plurality of first processing signals are signals with zero central frequency points, further, each first processing signal is subjected to in-band frequency sub-band frequency spectrum shifting processing, the second processing signals corresponding to each first processing signal can be obtained, the central frequency points of the obtained sub-bands of each second processing signal are zero, further, the interfered sub-carriers in the baseband synchronization signals corresponding to each sub-band of each second processing signal can be determined, the energy of the interfered sub-carriers is set to zero, the sub-carriers after the energy is set to zero can be added to obtain target soft information signals corresponding to each sub-band, further, each target soft information signal can be subjected to joint decoding, and the target synchronization signals with the interference removed can be obtained.
In the above scenario of determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band, the terminal may determine the interfered sub-carrier according to the signal to noise ratio of each sub-carrier of the baseband synchronization signal corresponding to each sub-band. In one embodiment, the determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band in S204 includes: and determining the interfered sub-carrier in the baseband synchronous signal corresponding to each sub-band according to the signal to noise ratio of each sub-carrier of the baseband synchronous signal corresponding to each sub-band.
Specifically, the terminal determines the interfered sub-carrier in the baseband synchronous signal corresponding to each sub-band according to the signal to noise ratio of each sub-carrier of the baseband synchronous signal corresponding to each sub-band. Optionally, the terminal may compare the signal-to-noise ratio of each subcarrier of the baseband synchronization signal corresponding to each subband with a preset threshold, and determine the subcarrier of which the signal-to-noise ratio of each subcarrier of the baseband synchronization signal corresponding to each subband is smaller than the preset threshold as the subcarrier interfered in the baseband synchronization signal corresponding to each subband. Alternatively, the signal-to-noise ratio corresponding to the subcarrier with stronger interference is lower, that is, the signal-to-noise ratio corresponding to the subcarrier with more serious interference is lower.
In this embodiment, the terminal can quickly determine the interfered sub-carrier from the baseband synchronization signal corresponding to each sub-band according to the signal to noise ratio of each sub-carrier of the baseband synchronization signal corresponding to each sub-band.
In the scenario of performing joint decoding on each target soft information signal to obtain the target synchronization signal, in one embodiment, as shown in fig. 3, S204 includes:
s301, demodulating each target soft information signal to obtain a demodulated target soft information signal.
Specifically, the terminal demodulates each target soft information signal to obtain a demodulated target soft information signal. Alternatively, the terminal may convert each target soft information signal into a digital baseband signal, to obtain a demodulated target soft information signal.
S302, the demodulated target soft information signals are subjected to joint decoding to obtain target synchronous signals.
Specifically, the terminal performs joint decoding on the obtained demodulated target soft information signal to obtain a target synchronous signal. That is, the terminal may accumulate the obtained demodulated target soft information to obtain the target synchronization signal.
In this embodiment, the process of demodulating each target soft information signal by the terminal is very simple, so that the terminal can rapidly and accurately demodulate each target soft information signal, thereby ensuring the accuracy of the obtained demodulated target soft information signal, and further, can accurately and jointly decode the demodulated target soft information signal, thereby ensuring the accuracy of the obtained target synchronization signal.
Based on the above embodiments, in one embodiment, the synchronization signal is a frequency hopping processed signal.
Specifically, the synchronization signal received by the terminal is a signal after frequency hopping processing. The frequency hopping technique is a method of frequency shift keying using a pseudo-random code sequence to continuously hop a carrier frequency and spread the spectrum. The synchronization signal in the embodiment of the application is a signal after frequency hopping processing, and interference of external information on a communication signal can be blocked by frequency hopping, for example, slow frequency hopping such as 1000 frequency hopping can be adopted to resist blocking interference.
In this embodiment, since the synchronization signal received by the terminal is a signal after frequency hopping processing, and frequency hopping can block certain interference, the synchronization signal received by the terminal is a synchronization signal that blocks certain interference, and then the interference in the synchronization signal can be further removed by processing the synchronization signal, so as to ensure the robustness of the target synchronization signal.
It should be understood that, although the steps in the flowcharts of fig. 2-3 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-3 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the steps or stages in other steps or other steps.
In one embodiment, as shown in fig. 4, there is provided a signal processing apparatus including: the device comprises a first processing module, a second processing module, a filtering module, a third processing module and a fourth processing module, wherein:
the first processing module is used for respectively carrying out overall frequency spectrum shifting processing on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
the second processing module is used for carrying out in-band frequency molecular band frequency spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
the filtering module is used for carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
the third processing module is used for determining the interfered sub-carrier wave in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier wave to zero, and adding the sub-carrier waves with the energy set to zero to obtain a target soft information signal corresponding to each sub-band;
the fourth processing module is used for carrying out joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is an interference-removed synchronization signal.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
On the basis of the above embodiment, optionally, the third processing module includes: a determination unit in which:
and the determining unit is used for determining the interfered subcarriers in the baseband synchronous signals corresponding to the subbands according to the signal-to-noise ratio of the subcarriers of the baseband synchronous signals corresponding to the subbands.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
On the basis of the above embodiment, optionally, the determining unit is configured to compare a signal-to-noise ratio of each subcarrier of the baseband synchronization signal corresponding to each subband with a preset threshold; and determining the subcarriers of which the signal to noise ratios of the subcarriers of the baseband synchronizing signals corresponding to the subbands are smaller than a preset threshold value as the interfered subcarriers in the baseband synchronizing signals corresponding to the subbands.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
On the basis of the above embodiment, optionally, the fourth processing module includes: a first processing unit and a second processing unit, wherein:
and the first processing unit is used for demodulating each target soft information signal to obtain a demodulated target soft information signal.
And the second processing unit is used for carrying out joint decoding on the demodulated target soft information signals to obtain target synchronous signals.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
Based on the above embodiment, optionally, the synchronization signal is a signal after frequency hopping processing.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
Based on the above embodiment, optionally, the signal-to-noise ratio corresponding to the subcarrier with the stronger interference degree is lower.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
On the basis of the above embodiment, optionally, the center frequency point of each subband of each second processed signal is 0.
The signal processing device provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
For specific limitations of the signal processing apparatus, reference may be made to the above limitations of the signal processing method, and no further description is given here. Each of the modules in the above-described signal processing apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a terminal is provided, the internal structure of which may be as shown in fig. 5. The terminal comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the terminal is adapted to provide computing and control capabilities. The memory of the terminal includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a signal processing method. The display screen of the terminal can be a liquid crystal display screen or an electronic ink display screen, the input device of the terminal can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 5 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting treatment on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining the interfered sub-carrier in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier to zero, and adding the sub-carriers with the energy set to zero to obtain a target soft information signal corresponding to each sub-band;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is an interference-removed synchronization signal.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting treatment on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining the interfered sub-carrier in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier to zero, and adding the sub-carriers with the energy set to zero to obtain a target soft information signal corresponding to each sub-band;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is an interference-removed synchronization signal.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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 merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A method of signal processing, the method comprising:
respectively carrying out overall frequency spectrum shifting treatment on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
carrying out in-band frequency sub-band spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
determining interfered subcarriers in baseband synchronous signals corresponding to the subbands, setting the energy of the interfered subcarriers to zero, and adding all the subcarriers with the energy set to zero to obtain target soft information signals corresponding to the subbands;
performing joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
2. The method of claim 1, wherein determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band comprises:
and determining the interfered subcarriers in the baseband synchronous signals corresponding to the subbands according to the signal-to-noise ratio of the subcarriers of the baseband synchronous signals corresponding to the subbands.
3. The method of claim 2, wherein determining the interfered sub-carrier in the baseband synchronization signal corresponding to each sub-band according to the signal to noise ratio of each sub-carrier of the baseband synchronization signal corresponding to each sub-band comprises:
comparing the signal-to-noise ratio of each subcarrier of the baseband synchronous signal corresponding to each subband with a preset threshold;
and determining the subcarriers of which the signal to noise ratios of the subcarriers of the baseband synchronizing signals corresponding to the subbands are smaller than the preset threshold value as the interfered subcarriers in the baseband synchronizing signals corresponding to the subbands.
4. The method of claim 1, wherein said jointly decoding each of said target soft information signals to obtain a target synchronization signal comprises:
demodulating each target soft information signal to obtain a demodulated target soft information signal;
and carrying out joint decoding on the demodulated target soft information signals to obtain the target synchronous signals.
5. The method of claim 1, wherein the synchronization signal is a frequency hopped signal.
6. The method of claim 2, wherein the more interfered subcarriers correspond to a lower signal-to-noise ratio.
7. The method of claim 1, wherein a center frequency point of each subband of each of the second processed signals is 0.
8. A signal processing apparatus, the apparatus comprising:
the first processing module is used for respectively carrying out overall frequency spectrum shifting processing on the synchronous signals received at each moment in a preset time period to obtain a plurality of first processing signals; the synchronous signal is a signal sent by a sending end by adopting a time division repetition method;
the second processing module is used for carrying out in-band frequency sub-band frequency spectrum shifting processing on each first processing signal to obtain a second processing signal corresponding to each first processing signal;
the filtering module is used for carrying out low-pass filtering on each sub-band of each second processing signal to obtain a baseband synchronous signal corresponding to each sub-band of each second processing signal;
the third processing module is used for determining the interfered sub-carrier wave in the baseband synchronous signal corresponding to each sub-band, setting the energy of the interfered sub-carrier wave to zero, and adding all sub-carrier waves with the energy set to zero to obtain a target soft information signal corresponding to each sub-band;
the fourth processing module is used for carrying out joint decoding on each target soft information signal to obtain a target synchronous signal; the target synchronization signal is a synchronization signal with interference removed.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN103188176A (en) * | 2011-12-31 | 2013-07-03 | 中国电子科技集团公司第五十研究所 | Method for reducing single frequency or narrow-band disturbing influence in orthogonal frequency division multiplexing system |
| CN110933007A (en) * | 2019-08-20 | 2020-03-27 | 熊军 | Device and method for eliminating interference aiming at OFDM broadband signals |
| CN111711594A (en) * | 2020-07-20 | 2020-09-25 | 浙江大华技术股份有限公司 | Single-frequency interference processing method and device |
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| CN103188176A (en) * | 2011-12-31 | 2013-07-03 | 中国电子科技集团公司第五十研究所 | Method for reducing single frequency or narrow-band disturbing influence in orthogonal frequency division multiplexing system |
| CN110933007A (en) * | 2019-08-20 | 2020-03-27 | 熊军 | Device and method for eliminating interference aiming at OFDM broadband signals |
| CN111711594A (en) * | 2020-07-20 | 2020-09-25 | 浙江大华技术股份有限公司 | Single-frequency interference processing method and device |
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