CN117294411A - Signal processing method, signal processing system, signal processing device, and storage medium - Google Patents
Signal processing method, signal processing system, signal processing device, and storage medium Download PDFInfo
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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
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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
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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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
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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
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- H—ELECTRICITY
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- 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
- H04L25/03821—Inter-carrier interference cancellation [ICI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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Abstract
The application discloses a signal processing method, a signal processing system, a signal processing device and a storage medium, which comprise the steps of obtaining a first signal sent out by a baseband module and a second signal received by a first antenna module, wherein the first signal and the second signal are transmitted in the same link, and the first signal and the second signal are transmitted at the same time; time delay alignment is carried out on the first signal and the second signal; channel estimation is carried out according to the first signal and the second signal after time delay alignment, and an interference reference signal is obtained; acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time; and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for transmission to the baseband module. And the digital module counteracts the third signal according to the interference reference signal obtained by the first signal and the second signal, so that the signal-to-noise ratio of the received signal can be improved.
Description
Technical Field
The present application relates to the field of signal processing technologies, and in particular, to a signal processing method, a signal processing system, a signal processing device, and a storage medium.
Background
In recent years, explosion of wireless communication traffic has increased, so that the problem of shortage of spectrum bandwidth resources has become more and more serious. Thus, various communication providers and researchers are seeking schemes for enhancing spectral efficiency, wherein full duplex technology for simultaneous co-frequency transmission and reception, and full duplex technology for simultaneous transmission and reception of adjacent sub-bands of the frequency band are currently in focus. However, in the full duplex technology, a transmission signal is received by the receiving link, and the transmission signal is of a magnitude stronger than the power of the reception signal, resulting in serious interference of the reception signal by the transmission signal.
Disclosure of Invention
The embodiment of the application provides a signal processing method, a signal processing system, a signal processing device and a storage medium, which can improve the signal-to-noise ratio of a received signal.
In a first aspect, an embodiment of the present application provides a signal processing method, which is applied to a full duplex signal processing system, where the signal processing system includes a radio frequency module, a digital module, and a baseband module, the radio frequency module includes a first antenna module and a second antenna module, the digital module is connected with the radio frequency module, and the baseband module is connected with the digital module, and the signal processing method includes:
acquiring a first signal sent out by the baseband module and a second signal received by the first antenna module, wherein the first signal and the second signal are transmitted in the same link, and the first signal and the second signal are transmitted at the same time;
time delay alignment is carried out on the first signal and the second signal;
performing channel estimation according to the first signal and the second signal after time delay alignment to obtain an interference reference signal;
acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time;
and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for being transmitted to the baseband module.
In a second aspect, embodiments of the present application further provide a signal processing system, including:
the radio frequency module comprises a first antenna module and a second antenna module, wherein the first antenna module and the second antenna module are both used for transmitting a first signal, the first antenna module is used for receiving a second signal, and the second antenna module is used for receiving a third signal;
the digital module is connected with the radio frequency module and is used for executing the signal processing method;
and the baseband module is connected with the digital module and is used for transmitting a first signal and receiving the target signal.
In a third aspect, an embodiment of the present application further provides a signal processing apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, which processor implements the signal processing method as described above when executing the computer program.
In a fourth aspect, embodiments of the present application also provide a computer-readable storage medium storing computer-executable instructions for performing the signal processing method as described above.
The embodiment of the application comprises the following steps: acquiring a first signal sent by a baseband module and a second signal received by a first antenna module, wherein the first signal and the second signal are transmitted in the same link, and the first signal and the second signal are transmitted at the same time; time delay alignment is carried out on the first signal and the second signal; channel estimation is carried out according to the first signal and the second signal after time delay alignment, and an interference reference signal is obtained; acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time; and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for transmission to the baseband module. According to the scheme of the embodiment of the application, the digital module performs anti-interference processing on the signals, and counteracts the signals by referring to the channel characteristics among different links for simultaneously transmitting the signals, so that the purpose of improving the signal-to-noise ratio of the received signals is achieved.
Drawings
FIG. 1 is a flow chart of a signal processing method provided in one embodiment of the present application;
FIG. 2 is a flowchart of a specific method of step S120 in FIG. 1;
FIG. 3 is a flowchart of a specific method of step S220 in FIG. 2;
FIG. 4 is a flow chart of another specific method of step S130 in FIG. 1;
FIG. 5 is a flowchart of a specific method of step S150 in FIG. 1;
fig. 6 is a schematic structural diagram of a first antenna module in a full duplex signal processing system according to another embodiment of the present application;
fig. 7 is a schematic diagram of the structure of the anti-interference process in the related art.
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.
It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 7, in the related art, a system includes a transmit signal circuit, a receive signal circuit, and a digital intermediate frequency module, and the receive signal includes an interference signal caused by the transmit signal, so that an interference signal extracting circuit is provided in the system to extract the interference signal, and the interference signal extracting circuit includes an additional analog-to-digital conversion circuit, an additional analog receive amplifying link, and a power supply and control link matched with the additional link, and then the receive signal is cancelled in the digital intermediate frequency, which requires an additional hardware link, thereby greatly increasing the complexity and cost of a PCB (Printed Circuit Board, a printed circuit board) applied to the full duplex technology.
The application provides a signal processing method, a full duplex signal processing system, a signal processing device and a computer readable storage medium, which comprise the steps of obtaining a first signal sent by a baseband module and a second signal received by a first antenna module, wherein the first signal and the second signal are transmitted on the same link, and the first signal and the second signal are transmitted at the same time; time delay alignment is carried out on the first signal and the second signal; channel estimation is carried out according to the first signal and the second signal after time delay alignment, and an interference reference signal is obtained; acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time; and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for transmission to the baseband module. According to the scheme of the embodiment of the application, the digital module performs anti-interference processing on the signals, and counteracts the signals by referring to the channel characteristics among different links for simultaneously transmitting the signals, so that the purpose of improving the signal-to-noise ratio of the received signals is achieved.
Embodiments of the present application are further described below with reference to the accompanying drawings.
As shown in fig. 1, fig. 1 is a flowchart of a signal processing method according to an embodiment of the present application, where the signal processing method is applied to a full duplex signal processing system, and the signal processing system includes a radio frequency module, a digital module, and a baseband module, the radio frequency module includes a first antenna module and a second antenna module, the digital module is connected to the radio frequency module, and the baseband module is connected to the digital module, and the signal processing method may include, but is not limited to, step S110, step S120, step S130, step S140, and step S150.
Step S110: and acquiring a first signal sent out by the baseband module and a second signal received by the first antenna module, wherein the first signal and the second signal are transmitted on the same link, and the first signal and the second signal are transmitted at the same time.
In this step, the first signal and the second signal are transmitted on the same link, that is, the first signal and the second signal are transmitted on the same link between the digital module and the radio frequency module, and the first signal and the second signal are obtained to facilitate obtaining the target signal in the subsequent step.
In another embodiment of the present application, the first signal sent out by the baseband module may be a digital signal, the second signal received by the first antenna module is an analog signal, and after the digital module obtains the second signal received by the first antenna module, the digital module may convert the second signal into a digital signal through a digital-to-analog converter, so that the anti-interference capability of the second signal may be improved.
Step S120: and performing time delay alignment on the first signal and the second signal.
In this step, time-delay alignment is performed on the first signal and the second signal, which means that the start time of the first signal is aligned with the start time of the second signal, and the effective start time refers to the start time of the useful signal in the signal, and it is understood that the initial time of the received signal is not necessarily the effective start time. Because the first signal interferes with the second signal, the interference signals in the first signal and the second signal are determined to be homologous, when the effective starting time of the first signal is aligned with the effective starting time of the second signal, the time delay between the first signal and the second signal is completely aligned, so that the channel estimation of the first signal and the second signal in the subsequent steps can be facilitated, and the purpose of improving the calculation efficiency of the channel estimation is achieved.
In another embodiment of the present application, the time delay alignment of the first signal and the second signal may be that the time delay alignment of the first signal and the second signal is performed by any time delay alignment algorithm in the related art, which is not specifically limited herein.
Step S130: and carrying out channel estimation according to the first signal and the second signal after time delay alignment to obtain an interference reference signal.
In this step, when the time delays between the first signal and the second signal are aligned, because the first signal and the second signal are transmitted in the same link, the first signal is a transmitted signal, the second signal is a received signal, and channel estimation is performed on the first signal and the second signal, so that channel characteristics of the transmission links of the first signal and the second signal can be obtained, and an interference reference signal can be obtained according to the channel characteristics, so that cancellation is performed on the third signal in a subsequent step to obtain the target signal.
In another embodiment of the present application, the channel estimation may use any channel estimation method in the related art, for example, estimation based on the reference signal, that is, estimation based on the first signal and the second signal, so that the channel characteristic condition of the link and the interference reference signal can be obtained, which is not limited herein specifically.
Step S140: and acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time.
In this step, the third signal refers to a signal received by the second antenna module, where the third signal may be an analog signal, and the third signal is obtained to facilitate obtaining the target signal in a subsequent step.
In another embodiment of the present application, the third signal and the second signal are not transmitted on the same link, and then the third signal and the first signal are not transmitted on the same link. Because the second signal and the second signal are transmitted at the same time, the third signal and the second signal are received at the same time, and the third signal and the second signal are interfered by the first signal, the interference signal of the third signal and the interference signal of the second signal are homologous, and the third signal can be counteracted by the interference reference signal, so that a target signal is obtained, and the purpose of improving the signal-to-noise ratio of the received signal is achieved.
Step S150: and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for transmission to the baseband module.
In this step, the interference reference signal can characterize the channel characteristics of the transmission link of the first signal and the second signal, and since the source of the channel interference suffered by the third signal is also the first signal, the interference signal included in the third signal is homologous to the interference signal of the second signal, and only the amplitude and the phase are different. And carrying out offset processing on the third signal according to the interference reference signal, so that the interference signal in the third signal can be eliminated, a target signal for being transmitted to the baseband module is obtained, and the purpose of improving the signal-to-noise ratio of the received signal is achieved.
In another embodiment of the present application, the target signal is obtained in the digital module, so that the target signal is transmitted to the baseband module, the second signal and the third signal are transmitted at the same time, and the second signal and the third signal contain the same target signal, so that only the target signal obtained after the third signal is cancelled needs to be transmitted to the baseband module.
In still another embodiment of the present application, the interfering reference signal may represent an interfering signal in the second signal, and the cancellation process may be direct subtraction of the interfering reference signal and the third signal, or may be first obtaining an inverse signal of the interfering reference signal, so as to add the inverse signal to the third signal, thereby achieving the purpose of obtaining the target signal.
In this embodiment, by adopting the signal processing method including steps S110 to S150, a first signal sent by the baseband module and a second signal received by the first antenna module are obtained, where the first signal and the second signal are transmitted in the same link, and the first signal and the second signal are transmitted at the same time; time delay alignment is carried out on the first signal and the second signal; channel estimation is carried out according to the first signal and the second signal after time delay alignment, and an interference reference signal is obtained; acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time; according to the scheme of the embodiment of the application, the interference reference signal is obtained through the first signal and the second signal, so that the third signal is counteracted to obtain the target signal, the cost of adding an extra hardware link is saved, the problem of how to extract the interference signal from the leakage interference signal is solved, the problem of damaging the received signal is prevented in the counteraction process, and the purpose of improving the signal-to-noise ratio of the received signal can be achieved.
It should be noted that the interfering reference signal may not directly cancel the second signal, because the interfering reference signal is obtained by channel estimation of the first signal and the second signal, and can represent the channel characteristics of the transmission link of the first signal and the second signal, and canceling the second signal according to the interfering reference signal may cause the target signal to also disappear, so that the purpose of obtaining the target signal cannot be achieved.
In an embodiment, as shown in fig. 2, the signal processing method is further described, and step S120 may further include, but is not limited to, step S210, step S220, step S230, step S240, step S250, and step S260.
Step S210: and sampling the first signal at intervals of a preset time length to obtain a first sampling point.
In this step, the interval preset time period may be any time distance in the related art, for example: for a first signal with a duration of six seconds, the second data, the fourth second data and the sixth second data in the first signal are respectively sampled, that is, the first signal is sampled at intervals of two seconds, so that three first sampling points can be obtained. Sampling the first signal at intervals of a preset duration refers to sampling the first signal at intervals of the preset duration respectively to obtain first sampling points. In an alternative embodiment, the first signal may be sampled by taking the starting position of the first signal as a first sampling point, and then sampling is performed once every preset time interval to obtain a plurality of first sampling points, where the number of first sampling points may be any number, and the number of first sampling points is not specifically limited herein, so as to facilitate time delay alignment of the first signal and the second signal in a subsequent step.
Step S220: and comparing the values of the adjacent first sampling points to obtain a first key value.
In this step, the first sampling points are sampling points obtained by sampling the first signal at intervals of a preset duration, values of adjacent first sampling points are compared to obtain first key values, the first key values represent differences of values between two adjacent first sampling points, and the first key values are obtained to facilitate obtaining of time delay differences in subsequent steps.
In another embodiment of the present application, when the first signal is a digital signal, the value of the first sampling point is 0 or 1; when the first signal is an analog signal, the value of the first sampling point may be any value.
Step S230: and sampling the second signal at intervals of a preset time length to obtain second sampling points, wherein the number of the first sampling points is the same as that of the second sampling points.
In this step, the preset duration may be any time distance in the related art, and sampling the second signal at intervals of the preset duration refers to sampling the second signal at intervals of the preset duration respectively to obtain a second sampling point. In an alternative embodiment, the second signal may be sampled, where the starting position of the second signal is taken as a first sampling point, and then sampling is performed once every preset time interval, so as to finally obtain a plurality of second sampling points, where the number of second sampling points may be any number, and the second sampling points are obtained to facilitate time delay alignment of the first signal and the second signal in a subsequent step.
In another embodiment of the present application, the number of the second sampling points is the same as the number of the first sampling points, that is, when the lengths of the first signal and the second signal are inconsistent, only the same number of sampling points need to be acquired, so as to facilitate obtaining the delay difference in the subsequent steps.
Step S240: and comparing the values of the adjacent second sampling points to obtain a second key value.
In this step, the second sampling points are sampling points obtained by sampling the second signal at intervals of a preset duration, and values of adjacent second sampling points are compared to obtain second key values, wherein the second key values represent differences of values between two adjacent second sampling points, and the second key values are obtained to facilitate obtaining of time delay differences in subsequent steps.
In another embodiment of the present application, when the second signal is a digital signal, the value of the second sampling point is 0 or 1; when the second signal is an analog signal, the value of the second sampling point may be any value.
Step S250: and obtaining a time delay difference value according to the first key value and the second key value.
In this step, the first key value represents the difference of values between two adjacent first sampling points, the second key value represents the difference of values between two adjacent second sampling points, since the first sampling point is a point obtained by sampling in a preset time period in the first signal, the second sampling point is a point obtained by sampling in a preset time period in the second signal, the first key value represents the change condition of the first signal, the second key value represents the change condition of the second signal, and since the first signal and the second signal are transmitted in the same link, the interference signal and the first signal in the second signal are homologous, and only the amplitude and the phase are different, the delay difference between the first signal and the second signal can be obtained according to the first key value and the second key value.
In an alternative embodiment, the first signal and the second signal are both digital signals, the first key value and the second key value each include a plurality of values, and when the trends are the same, the signals representing the corresponding positions are corresponding according to the trend of the difference between the first key value and the trend of the difference between the second key value, so that a time delay difference can be obtained.
Step S260: the first signal and the second signal are aligned according to the delay difference.
In this step, the time delay difference refers to a time delay difference between the first signal and the second signal, where the time delay difference may be obtained according to a first critical value and a second critical value, and the first signal and the second signal are aligned according to the time delay difference, and in an optional implementation manner, in a sampling operation of the signals, the first sampling point is a start position of the signals, and may be the start position of the first signal and the start position of the second signal are aligned according to the first critical value and the second critical value, so that the purpose of aligning the first signal and the second signal can be achieved, and subsequent channel estimation can be facilitated after aligning the first signal and the second signal, and accuracy of channel estimation is improved.
In this embodiment, by adopting the signal processing method including steps S210 to S260, the first signal is sampled at intervals of the first distance, so as to obtain a first sampling point; comparing the values of the adjacent first sampling points to obtain a first key value; sampling the second signal at intervals of a first distance to obtain second sampling points, wherein the number of the first sampling points is the same as that of the second sampling points; comparing the values of the adjacent second sampling points to obtain a second key value; obtaining a time delay difference value according to the first key value and the second key value; according to the scheme of the embodiment of the application, the first signal and the second signal are aligned according to the time delay difference, and the purpose of aligning the first signal and the second signal can be achieved according to the difference between the first sampling point and the second sampling point, so that the accuracy of channel estimation is improved, and the purpose of improving the signal to noise ratio of a received signal is achieved.
In an embodiment, as shown in fig. 3, to further describe the signal processing method, the first sampling point includes a first adjacent sampling point and a second adjacent sampling point, and step S220 may further include, but is not limited to, step S310.
Step S310: the first key value is set to 1 when the value of the first adjacent sample point is greater than the value of the second adjacent sample point, and the first key value is set to-1 when the value of the first adjacent sample point is less than the value of the second adjacent sample point.
In this step, the first adjacent sampling point and the second adjacent sampling point are two adjacent first sampling points, the first adjacent sampling point is in front of or behind the second adjacent sampling point, when the value of the first adjacent sampling point is greater than that of the second adjacent sampling point, the first key value is set to be 1, and when the value of the first adjacent sampling point is less than that of the second adjacent sampling point, the first key value is set to be-1, so that the process of calculating the value of the sampling point is saved, and the purpose of improving the calculation efficiency can be achieved.
In another embodiment of the present application, when the first signal is a digital signal, the value of the first sampling point is 0 or 1, and the first key value may be a value obtained by subtracting the value of the second adjacent sampling point from the value of the first adjacent sampling point, so that the obtained value is 1 or-1, and thus the time delay difference value can be obtained according to the first key value and the second key value in the subsequent step conveniently.
In still another embodiment of the present application, when the first signal is an analog signal, the value of the first sampling point may be any value, and only the value of the first adjacent sampling point and the value of the second adjacent sampling point need to be compared, so that the first key value can be obtained, and a process of calculating the value of the sampling point is saved, so that the purpose of improving the calculation efficiency can be achieved.
In this embodiment, by adopting the signal processing method including the step S310, when the value of the first adjacent sampling point is greater than the value of the second adjacent sampling point, the first key value is set to 1, and when the value of the first adjacent sampling point is less than the value of the second adjacent sampling point, the first key value is set to-1.
It should be noted that, the same calculation manner may be adopted for the second sampling point, so as to obtain the second key value, and the delay difference value may be obtained according to the first key value and the second key value, or the first key value and the second key value may be multiplied, because the value of the first key value is-1 or 1, the value of the second key value is-1 or 1, when the product of the first key value and the second key value is 1, it indicates that the first signal and the second signal are aligned, so as to be convenient for judging the delay difference value, and achieve the purpose of improving the calculation efficiency.
In an embodiment, as shown in fig. 4, further describing the signal processing method, the first sampling point includes a first adjacent sampling point and a second adjacent sampling point, and step S130 may further include, but is not limited to, step S410 and step S420.
Step S410: and carrying out channel estimation according to the first signal and the second signal after time delay alignment to obtain a correlation matrix.
In this step, the channel estimation may be based on estimation of the first signal and the second signal, and because the first signal and the second signal are aligned by time delay, and the first signal and the second signal are transmitted in the same link, the first signal and the second signal are transmitted at the same time, and an interference signal in the second signal is homologous to the first signal, and the first signal and the second signal are subjected to channel estimation to obtain a correlation matrix, where the correlation matrix can represent correlation between the interference signal in the second signal and the first signal, and obtaining the correlation matrix can be convenient for obtaining the interference reference signal in a subsequent step.
Step S420: and obtaining an interference reference signal according to the first signal and the correlation matrix.
In this step, if the first signal is X and the correlation matrix is H, the interference signal in the second signal may be represented as x×h. Further, since the third signal and the second signal are transmitted at the same time, the third signal has the same useful signal as the second signal, the channel characteristics of the link for transmitting the third signal are basically consistent with those of the link for transmitting the second signal, and the interference signal in the third signal can also be expressed as x×h, so that the obtained interference reference signal can be used for canceling with the third signal to obtain the useful signal in the third signal, thereby reducing the interference of the transmitted signal to the received signal and achieving the purpose of improving the signal-to-noise ratio of the received signal.
In this embodiment, by adopting the signal processing method including steps S410 to S420, channel estimation is performed according to the first signal and the second signal after time delay alignment, so as to obtain a correlation matrix; according to the scheme of the embodiment of the application, the interference reference signal can be obtained, so that the condition that the transmitted signal interferes with the received signal can be reduced, and the purpose of improving the signal-to-noise ratio of the received signal is achieved.
It should be noted that, when the interference reference signal is used for canceling the second signal, the interference reference signal will cancel the useful signal in the second signal, and since the second signal and the third signal are transmitted at the same time, the second signal and the third signal have the same useful signal, and in the subsequent step, the interference reference signal is used for canceling the third signal to obtain the useful signal, so that the purpose of receiving the useful signal can be achieved.
In an embodiment, as shown in fig. 5, to further describe the signal processing method, the first sampling point includes a first adjacent sampling point and a second adjacent sampling point, and step S150 may further include, but is not limited to, step S510.
Step S510: and subtracting the interference reference signal from the third signal to obtain a target signal for transmission to the baseband module.
In this step, the target signal refers to a signal received by the radio frequency module and not passing through the transmission link, the useful signal in the third signal is the target signal, and since the interference reference signal can represent the interference signal of the second signal, the channel characteristics between the transmission link of the second signal and the transmission link of the third signal are basically consistent, and the interference reference signal is directly subtracted from the third signal, so that the purpose of counteracting the interference signal in the third signal can be achieved, and the target signal for transmitting to the baseband module is obtained.
In another embodiment of the present application, the digital module counteracts the third signal according to the interference reference signal, so as to obtain the target signal, and the target signal is transmitted to the baseband module through the digital module, so as to achieve the purpose of signal transmission.
In this embodiment, by adopting the signal processing method including the step S510, the interference reference signal is directly subtracted from the third signal to obtain the target signal for transmission to the baseband module.
Furthermore, an embodiment of the present application provides a full duplex signal processing system, which includes a radio frequency module, a digital module, and a baseband module.
The radio frequency module comprises a first antenna module and a second antenna module, and the first antenna module and the second antenna module can be respectively provided with a receiving antenna and a transmitting antenna, that is, the receiving antenna and the transmitting antenna are in a common antenna state. The first signal is transmitted by the baseband module, and the first antenna module and the second antenna module are both used for transmitting the first signal, that is, the first signal passes through a transmitting link corresponding to the first antenna module and a corresponding transmitting link of the second antenna module and then is transmitted. The first antenna module is configured to receive the second signal, and the second antenna module is configured to receive the third signal, and it can be understood that, for the rf module, the second signal and the third signal are received through different antenna modules, and the second signal and the third signal are transmitted on different links.
The digital module is connected to the radio frequency module, and the digital module may transmit the first signal, the second signal and the third signal, and is used to perform the signal processing method as described above, and after performing the signal processing method, the third signal can be subjected to anti-interference processing and a target signal is obtained, where the target signal refers to a useful signal received by the first antenna module and the second antenna module and not transmitted through the link in the third signal, and the digital module performs the signal processing method in the above embodiment, for example, performs the method steps S110 to S150 in fig. 1, the method steps S210 to S260 in fig. 2, the method step S310 in fig. 3, the method steps S410 to S420 in fig. 4, and the method step S510 in fig. 5 described above.
The baseband module is connected with the digital module and is used for transmitting a first signal and receiving a target signal, and the first signal can be used for carrying out anti-interference processing on the received signal so as to improve the signal-to-noise ratio of the target signal received by the baseband module.
In another embodiment of the present application, referring to fig. 6, fig. 6 shows a schematic diagram of a connection structure of a first antenna module, for an antenna module, including a transmitting antenna and a receiving antenna, a radio frequency module is connected with a digital module, the digital module is connected with the first antenna module, a link connected with the digital module includes a transmitting link and a receiving link, a first signal in the transmitting link interferes with a second signal in the receiving link, when the second signal is received, the digital module obtains an interference reference signal according to the first signal and the second signal, and then counteracts a third signal to obtain a target signal.
In an embodiment, the radio frequency module further includes a filter module, the filter module is connected with the radio frequency module, the filter module is connected with the first antenna module, the filter module is connected with the second antenna module, and the filter module is used for suppressing spurious signals and blocking signals.
It may be understood that the filter module refers to any filter module in the related art, where the filter module may be disposed on the receiving link, and may be provided with a plurality of filter modules to be connected with the first antenna module and the second antenna module, respectively, so as to perform preliminary anti-interference processing on the second signal and the third signal, and suppress spurious signals and blocking signals caused by other factors such as medium interference, receiving frequency band interference, and the like.
In an embodiment, the radio frequency module further comprises a digital-to-analog converter for converting the first signal into an analog signal and an analog-to-digital converter for converting the second signal and the third signal into digital signals.
It can be understood that the digital-to-analog converter can be any digital-to-analog converter in the related art, the analog-to-digital converter can be any analog-to-digital converter in the related art, the digital-to-analog converter and the analog-to-digital converter are arranged on the radio frequency module, the first signal is sent by the baseband module, the first signal is originally a digital signal, and the digital-to-analog converter can be arranged on the transmitting link to convert the first signal into an analog signal; the second signal and the third signal are analog signals when just received, and the analog-to-digital converters can be multiple and are respectively arranged on the receiving link to convert the second signal and the third signal into digital signals.
In addition, an embodiment of the present application further provides a signal processing apparatus, including: memory, a processor, and a computer program stored on the memory and executable on the processor.
The processor and the memory may be connected by a bus or other means.
The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory 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, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through 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 non-transitory software program and instructions required to implement the signal processing method of the above-described embodiments are stored in the memory, and when executed by the processor, the signal processing method of the above-described embodiments is performed, for example, the method steps S110 to S150 in fig. 1, the method steps S210 to S260 in fig. 2, the method step S310 in fig. 3, the method steps S410 to S420 in fig. 4, and the method step S510 in fig. 5 described above are performed.
Furthermore, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or a controller, for example, by one of the processors in the above-described apparatus embodiments, which may cause the processor to perform the signal processing method in the above-described embodiment, for example, perform the method steps S110 to S150 in fig. 1, the method steps S210 to S260 in fig. 2, the method step S310 in fig. 3, the method steps S410 to S420 in fig. 4, and the method step S510 in fig. 5 described above.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, of the methods disclosed above may be implemented as software, firmware, hardware, or any suitable combination. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of signals such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired signals and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any signal delivery media.
Claims (10)
1. The signal processing method is applied to a full duplex signal processing system, the signal processing system comprises a radio frequency module, a digital module and a baseband module, the radio frequency module comprises a first antenna module and a second antenna module, the digital module is connected with the radio frequency module, the baseband module is connected with the digital module, and the signal processing method comprises the following steps:
acquiring a first signal sent out by the baseband module and a second signal received by the first antenna module, wherein the first signal and the second signal are transmitted in the same link, and the first signal and the second signal are transmitted at the same time;
time delay alignment is carried out on the first signal and the second signal;
performing channel estimation according to the first signal and the second signal after time delay alignment to obtain an interference reference signal;
acquiring a third signal received by the second antenna module, wherein the third signal and the second signal are not transmitted in the same link, and the third signal and the second signal are transmitted at the same time;
and carrying out offset processing on the third signal according to the interference reference signal to obtain a target signal for being transmitted to the baseband module.
2. The signal processing method of claim 1, wherein said time-delay aligning said first signal and said second signal comprises:
sampling the first signal at intervals of a preset time length to obtain a first sampling point;
comparing the values of the adjacent first sampling points to obtain a first key value;
sampling the second signal at intervals of the preset duration to obtain second sampling points, wherein the number of the first sampling points is the same as that of the second sampling points;
comparing the values of the adjacent second sampling points to obtain a second key value;
obtaining a time delay difference value according to the first key value and the second key value;
and aligning the first signal and the second signal according to the time delay difference value.
3. The signal processing method according to claim 2, wherein the first sampling point includes a first adjacent sampling point and a second adjacent sampling point, and the comparing the values of the adjacent first sampling points to obtain a first key value includes:
and when the value of the first adjacent sampling point is smaller than that of the second adjacent sampling point, setting the first key value to be-1.
4. The signal processing method according to claim 1, wherein the performing channel estimation according to the first signal and the second signal after time delay alignment to obtain an interference reference signal includes:
performing channel estimation according to the first signal and the second signal after time delay alignment to obtain a correlation matrix;
and obtaining an interference reference signal according to the first signal and the correlation matrix.
5. The signal processing method according to claim 1, wherein the performing cancellation processing on the third signal according to the interference reference signal to obtain a target signal for transmission to the baseband module includes:
and subtracting the interference reference signal from the third signal to obtain a target signal for transmission to the baseband module.
6. A full duplex signal processing system, comprising:
the radio frequency module comprises a first antenna module and a second antenna module, wherein the first antenna module and the second antenna module are both used for transmitting a first signal, the first antenna module is used for receiving a second signal, and the second antenna module is used for receiving a third signal;
a digital module connected to the radio frequency module, the digital module for performing the signal processing method according to any one of claims 1 to 5;
and the baseband module is connected with the digital module and is used for transmitting the first signal and receiving the target signal.
7. The signal processing system of claim 6, wherein the rf module further comprises a filter module, the filter module being coupled to the rf module, the filter module being coupled to the first antenna module, the filter module being coupled to the second antenna module, the filter module being configured to reject spurious signals and blocking signals.
8. The signal processing system of claim 6, wherein the radio frequency module further comprises a digital-to-analog converter for converting the first signal to an analog signal and an analog-to-digital converter for converting the second signal and the third signal to digital signals.
9. A signal processing apparatus comprising: memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the signal processing method according to any one of claims 1 to 5 when executing the computer program.
10. A computer-readable storage medium storing computer-executable instructions for performing the signal processing method of any one of claims 1 to 5.
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| CN202210695587.7A CN117294411A (en) | 2022-06-20 | 2022-06-20 | Signal processing method, signal processing system, signal processing device, and storage medium |
| PCT/CN2023/101074 WO2023246699A1 (en) | 2022-06-20 | 2023-06-19 | Signal processing method, signal processing system, signal processing device, and storage medium |
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| CN103873399B (en) * | 2012-12-11 | 2018-03-09 | 华为技术有限公司 | Signal interference processing method, device and trunking |
| CN104954307B (en) * | 2015-05-21 | 2018-04-10 | 电子科技大学 | A kind of co-channel full duplex limit self-interference cancellation system simultaneously |
| CN114204962B (en) * | 2020-09-18 | 2023-11-17 | 上海华为技术有限公司 | Method and device for receiving signal |
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