CN113645016B - Signal processing system and method - Google Patents
Signal processing system and method Download PDFInfo
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- CN113645016B CN113645016B CN202110885089.4A CN202110885089A CN113645016B CN 113645016 B CN113645016 B CN 113645016B CN 202110885089 A CN202110885089 A CN 202110885089A CN 113645016 B CN113645016 B CN 113645016B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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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
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0042—Digital filtering
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
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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
- H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0096—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges where a full band is frequency converted into another full band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses a signal processing system and a signal processing method. The system comprises a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module and an intermediate frequency filtering module, wherein: the first signal amplification module receives the signal to be tested and amplifies the signal to be tested to obtain an amplified signal to be tested; the first filtering module carries out filtering treatment on the amplified signal to be tested to obtain a filtered signal to be tested; the amplification and attenuation module performs amplification and attenuation treatment on the filter signal to be tested to obtain an amplification and attenuation signal to be tested; the frequency mixing module carries out frequency mixing processing on the amplified and attenuated signals to be tested to obtain frequency mixing signals to be tested; and the intermediate frequency filtering module performs intermediate frequency filtering processing on the mixed signal to be tested to obtain an intermediate frequency signal to be tested. According to the technical scheme provided by the embodiment of the invention, under the condition that the signal index meets the standard, the high-frequency signal to be tested can be converted into the intermediate-frequency signal to be tested which can be used for testing, so that the testing requirement of the signal to be tested is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a signal processing system and a signal processing method.
Background
Wireless communication technology is a communication method for exchanging information by utilizing the characteristic that wireless signals can freely propagate in space. With the rapid development of communication technology, wireless communication technology is mature, and has been applied to many fields of information transmission to realize communication, so that great convenience is brought to people's life. Signal quality greatly affects the use experience of people, and therefore, testing of signal quality is also of great importance. However, the signal frequency of the signal to be tested cannot meet the test requirement of the device without any processing.
Disclosure of Invention
The embodiment of the invention provides a signal processing system and a signal processing method, which can convert a high-frequency signal to be tested into an intermediate-frequency signal to be tested which can be used for testing under the condition that signal indexes meet standards, so as to meet the testing requirements of the signal to be tested.
In a first aspect, an embodiment of the present invention provides a signal processing system, including a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module, and an intermediate frequency filtering module, where:
the output end of the first signal amplification module is electrically connected with the input end of the first filtering module and is used for receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
the output end of the first filtering module is electrically connected with the input end of the amplifying and attenuating module and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested;
the output end of the amplification and attenuation module is electrically connected with the input end of the frequency mixing module and is used for amplifying and attenuating the filter signal to be tested to obtain an amplified and attenuated signal to be tested;
the output end of the frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out frequency mixing treatment on the amplified and attenuated signal to be tested to obtain a frequency mixing signal to be tested;
and the intermediate frequency filtering module is used for performing intermediate frequency filtering processing on the mixed signal to be tested to obtain an intermediate frequency signal to be tested.
In a second aspect, an embodiment of the present invention further provides a signal processing method, which is applied to a signal processing system, including:
receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
filtering the amplified signal to be tested to obtain a filtered signal to be tested;
amplifying and attenuating the filter signal to be tested to obtain an amplified and attenuated signal to be tested;
carrying out frequency mixing treatment on the amplified and attenuated signal to be tested to obtain a frequency mixing signal to be tested;
and performing intermediate frequency filtering processing on the mixed signal to be tested to obtain an intermediate frequency signal to be tested.
The embodiment of the invention comprises a signal processing system which is formed by a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a frequency mixing module and an intermediate frequency filtering module, wherein the first signal amplifying module is used for receiving a signal to be tested, amplifying the signal to be tested to obtain the amplified signal to be tested, the first filtering module is used for filtering the amplified signal to be tested to obtain the filtered signal to be tested, the amplifying and attenuating module is used for amplifying and attenuating the filtered signal to be tested to obtain the amplified and attenuated signal to be tested, the frequency mixing module is further used for carrying out frequency mixing on the amplified and attenuated signal to be tested to obtain the frequency mixing signal to be tested, and the intermediate frequency filtering module is used for carrying out intermediate frequency filtering on the frequency mixing signal to be tested to obtain the intermediate frequency signal to be tested.
Drawings
Fig. 1 is a schematic diagram of a signal processing system according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a specific example of a signal processing system according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of another embodiment of a signal processing system according to a first embodiment of the present invention;
fig. 4 is a flowchart of a signal processing method according to a second embodiment of the present invention;
fig. 5 is a flowchart of a specific example of a signal processing method according to the second embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof.
It should be further noted that, for convenience of description, only some, but not all of the matters related to the present invention are shown in the accompanying drawings. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently, or at the same time. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The terms first and second and the like in the description and in the claims and drawings of embodiments of the invention are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.
Example 1
Fig. 1 is a schematic diagram of a signal processing system according to a first embodiment of the present invention, where the signal processing system includes: a first signal amplifying module 10, a first filtering module 20, an amplifying and attenuating module 30, a mixing module 40 and an intermediate frequency filtering module 50, wherein: the output end of the first signal amplification module 10 is electrically connected with the input end of the first filtering module 20, and is used for receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested; the output end of the first filtering module 20 is electrically connected with the input end of the amplifying and attenuating module 30, and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested; the output end of the amplification and attenuation module 30 is electrically connected with the input end of the mixing module 40 and is used for amplifying and attenuating the filter signal to be tested to obtain an amplified and attenuated signal to be tested; the output end of the mixing module 40 is electrically connected with the input end of the intermediate frequency filtering module 50, and is used for carrying out mixing treatment on the amplified and attenuated signal to be tested to obtain a mixed signal to be tested; the intermediate frequency filtering module 50 is configured to perform intermediate frequency filtering processing on the mixed signal to be tested, so as to obtain an intermediate frequency signal to be tested.
The first signal amplifying module 10 may be a module for amplifying a signal. The first filtering module 20 may be a module for filtering a signal. The amplification and attenuation module 30 may be a module for performing amplification and attenuation processing on a signal. The mixing module 40 may be a module for performing mixing processing on signals. The intermediate frequency filtering module 50 may be a module for performing intermediate frequency filtering processing on a signal. The signal to be tested may be a signal to be tested without signal processing. Alternatively, the signal to be measured may be a high frequency signal. The amplified signal to be tested may be a signal obtained by amplifying the signal to be tested. The filtered signal to be tested may be a signal obtained by filtering the amplified signal to be tested. The amplified and attenuated signal to be tested may be a signal obtained by amplifying and attenuating the filtered signal to be tested. The mixed signal to be tested can be a signal obtained by carrying out mixing processing on the amplified and attenuated signal to be tested. The intermediate frequency signal to be tested can be a signal obtained by performing intermediate frequency filtering processing on the mixed signal to be tested.
In the embodiment of the present invention, the signal processing system is composed of a first signal amplifying module 10, a first filtering module 20, an amplifying and attenuating module 30, a mixing module 40 and an intermediate frequency filtering module 50, wherein the first signal amplifying module 10 can receive a signal to be tested and amplify the signal to be tested to obtain an amplified signal to be tested, so that an output end of the first signal amplifying module 10 outputs the amplified signal to be tested to the first filtering module 20 to further process the amplified signal to be tested. After the input end of the first filtering module 20 receives the amplified signal to be tested, filtering processing can be further performed on the amplified signal to be tested to obtain a filtered signal to be tested, so that the output end of the first filtering module 20 outputs the filtered signal to be tested to the amplifying and attenuating module 30 to further process the filtered signal to be tested. After the input end of the amplifying and attenuating module 30 receives the filtered signal to be tested, the filtered signal to be tested may be further amplified and attenuated to obtain the amplified and attenuated signal to be tested, so that the output end of the amplifying and attenuating module 30 outputs the amplified and attenuated signal to be tested to the mixing module 40 to further process the amplified and attenuated signal to be tested. After the input end of the mixing module 40 receives the amplified and attenuated signal to be tested, the amplified and attenuated signal to be tested may be further mixed to obtain a mixed signal to be tested, so that the output end of the mixing module 40 outputs the mixed signal to be tested to the intermediate frequency filtering module 50 to further process the mixed signal to be tested. After the input end of the intermediate frequency filtering module 50 receives the mixed signal to be tested, intermediate frequency filtering processing can be further performed on the mixed signal to be tested to obtain an intermediate frequency signal to be tested, so that the output end of the intermediate frequency filtering module 50 outputs the intermediate frequency signal to be tested to test the intermediate frequency signal to be tested.
Alternatively, when the signal to be measured is only a signal with a frequency bandwidth, only one first filtering module may be required to perform filtering processing on the amplified signal after the amplifying processing by the first signal amplifying module.
Therefore, through the signal processing system, the high-frequency signal to be tested can be converted into the intermediate-frequency signal to be tested which can be used for testing, and meanwhile, the signal index can be ensured to meet the standard, namely, the signal index cannot be deteriorated, so that the testing requirement of the signal to be tested is met.
In an alternative implementation of the embodiment of the present invention, fig. 2 is a schematic diagram of a specific example of a signal processing system provided in the first embodiment of the present invention, and as shown in fig. 2, the signal processing system may further include a first radio frequency switch module 60; the number of the first filter modules 20 may be the same as the number of switching paths of the first rf switching module 60; the input end of the first rf switch module 60 may be electrically connected to the first signal amplifying module 10, and the output end may be electrically connected to each first filtering module 20, and may be used for screening and filtering sub-signals of the amplified signal to be tested according to signal testing requirements, to obtain a filtered signal to be tested.
The first rf switch module 60 may be used to select a corresponding filter module according to different frequency bands of the signal, for example, may be a radio frequency switch, which is not limited in the embodiment of the present invention. The sub-signals of the amplified signals to be tested may be amplified signals to be tested in different frequency bands.
In the embodiment of the invention, when the signal to be detected is a broadband signal, different sub-signals of various frequency bands in the broadband signal can be screened out through the first radio frequency switch module. Specifically, in the signal processing system, the number of the first filter modules 20 is the same as the number of the switching paths of the first rf switch module 60, that is, the output end of each path of switch of the first rf switch module 60 is connected to one first filter module 20, so as to select the filter modules corresponding to the frequency bands according to different frequency bands of the amplified signal to be tested.
Specifically, after the output end of the first signal amplifying module 10 outputs the amplified signal to be tested, the input end of the first radio frequency switch module 60 may receive the amplified signal to be tested, and perform screening and filtering processing on the amplified signal to be tested in different frequency bands according to the signal testing requirement, that is, select the switch branch of the corresponding first radio frequency switch module 60 according to the amplified signal to be tested in different frequency bands, so that the first filtering module 20 corresponding to the frequency band of the amplified signal to be tested performs screening and filtering processing on the amplified signal to be tested, so as to obtain the filtered signal to be tested.
In an alternative implementation of the embodiment of the present invention, the amplifying and attenuating module 30 may include a power amplifier 310 with a digitally controlled attenuator; the power amplifier 310 with a digital control attenuator can be used for amplifying and attenuating the filtered signal to be tested according to the configured attenuation and amplification parameters to obtain an amplified and attenuated signal to be tested.
The power amplifier 310 with a digitally controlled attenuator may be a power amplifier with an attenuator for automatically controlling signal attenuation, and may be used for amplifying and attenuating a filtered signal to be tested. The attenuation amplification parameter may be a parameter of a signal attenuation amplification value. It will be appreciated that the attenuation amplification parameters may be pre-configured to control the signal attenuation amplification values according to a particular scenario.
Alternatively, the amplification and attenuation module 30 may directly employ the power amplifier 310 with a digitally controlled attenuator. Correspondingly, after the first filtering module 20 outputs the filtered signal to be tested, the input end of the power amplifier 310 with the digital control attenuator of the amplifying and attenuating module 30 may receive the filtered signal to be tested, and further amplify and attenuate the filtered signal to be tested according to the pre-configured attenuation and amplification parameters, so as to obtain the amplified and attenuated signal to be tested.
In an alternative implementation of the embodiment of the present invention, fig. 3 is another specific exemplary schematic diagram of a signal processing system provided in the first embodiment of the present invention, and as shown in fig. 3, the amplifying and attenuating module 30 may include a programmable attenuating module 320 and a second signal amplifying module 330; the input end of the programmable attenuation module 320 is electrically connected with the output end of the first filtering module 20, and is used for carrying out attenuation processing on the filtering signal to be tested according to the configured attenuation parameters to obtain an attenuation signal to be tested; the input end of the second signal amplifying module 330 is electrically connected with the output end of the attenuation module, and the output end of the second signal amplifying module is electrically connected with the input end of the mixing module 40, so as to amplify the attenuation signal to be tested again, and obtain the amplified attenuation signal to be tested.
The programmable attenuation module 320 may be a programmable module for attenuating signals. The second signal amplification module 330 may be another module for amplifying a signal. The attenuation parameter may be a parameter of signal attenuation. The attenuation signal to be tested can be a signal obtained by carrying out attenuation processing on the filtering signal to be tested.
Optionally, the amplifying and attenuating module 30 may also be formed by using a programmable attenuating module 320 and a second signal amplifying module 330. Correspondingly, after the first filtering module 20 outputs the filtered signal to be tested, the input end of the programmable attenuation module 320 of the amplifying attenuation module 30 may receive the filtered signal to be tested, and further perform attenuation processing on the filtered signal to be tested according to the configured attenuation parameter to obtain an attenuated signal to be tested, so that the output end of the programmable attenuation module 320 may send the attenuated signal to be tested to the input end of the second signal amplifying module 330, and after the input end of the second signal amplifying module 330 receives the attenuated signal to be tested, perform amplification processing on the attenuated signal to be tested again to obtain an amplified attenuated signal to be tested, so as to output the amplified signal to be tested to the mixing module 40.
In an alternative implementation of the embodiment of the present invention, the signal processing system may further include a second radio frequency switch module 70, and the mixing module 40 may include a low-band mixing module 410, a high-band mixing module 430, and a local oscillator module 420; the input end of the second radio frequency switch module 70 is electrically connected with the output end of the amplifying and attenuating module 30, the output end is electrically connected with the input end of the low-frequency band mixing module 410 and is electrically connected with the input end of the high-frequency band mixing module 430, and the second radio frequency switch module is used for branching the amplifying and attenuating signal to be tested to obtain a first path of signal to be tested and a second path of signal to be tested; the input end of the low-frequency band mixing module 410 is electrically connected with the output end of the second radio frequency switch module 70 and the output end of the local oscillation module 420, and the output end of the low-frequency band mixing module is electrically connected with the input end of the intermediate frequency filtering module 50, and is used for performing low-frequency mixing processing on the first path of signals to be detected according to the local oscillation signals to obtain low-frequency signals to be detected; the input end of the high-frequency band mixing module 430 is electrically connected with the output end of the second radio frequency switch module 70 and the output end of the local oscillation module 420, and the output end of the high-frequency band mixing module 430 is electrically connected with the input end of the intermediate frequency filtering module 50, and is used for performing low-frequency mixing processing on the second path of signals to be detected according to the local oscillation signals to obtain high-frequency signals to be detected; the intermediate frequency filtering module 50 is configured to perform intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested, so as to obtain an intermediate frequency signal to be tested.
The second rf switch module 70 may be used to select a corresponding module according to different frequency bands of the signal, for example, may be an alternative rf switch, which is not limited in the embodiment of the present invention. The low-band mixing module 410 may be a module for mixing a low-band signal. The high-band mixing module 430 may be a module for mixing a high-band signal. The local oscillation module 420 may be a module for generating a local oscillation signal, and optionally, when the signal to be measured is a broadband signal, the local oscillation module 420 may generate a broadband local oscillation signal. The first path of signal to be measured may be a signal to be measured obtained after the second rf switch module 70 performs the splitting process. The second signal to be measured may be another signal to be measured obtained after the second rf switch module 70 performs the splitting process. The local oscillator signal may be a signal sent by the local oscillator module 420, and is used for performing mixing processing on the signal. For example, if the signal to be measured is a 5G signal, the local oscillator signal may be a broadband local oscillator signal, i.e., the local oscillator signal may be a 700M-6G signal. If the signal to be measured is a 4G signal, the local oscillator signal may be a 800M-2700M signal. The embodiments of the present invention are not limited in this regard. The low-frequency signal to be measured can be a signal obtained after low-frequency mixing processing. The high-frequency signal to be measured can be a signal obtained after high-frequency mixing processing.
Optionally, when the signal to be detected is a broadband signal, the signal may be further split by the second rf switch module. Accordingly, when the mixing processing is performed on the amplified and attenuated signal to be tested, after the input end of the second radio frequency switch module 70 receives the amplified and attenuated signal to be tested, the splitting processing may be further performed on the amplified and attenuated signal to be tested, so as to obtain a first path of signal to be tested and a second path of signal to be tested.
Alternatively, the mixing module 40 may be configured by a low-band mixing module 410, a high-band mixing module 430, and a local oscillation module 420. Correspondingly, the output end of the second rf switch module 70 outputs the first path of signal to be measured to the input end of the low-band mixing module 410, and outputs the second path of signal to be measured to the input end of the high-band mixing module 430. After receiving the local oscillation signal and the first path of signal to be measured sent by the local oscillation module 420, the input end of the low-frequency band mixing module 410 further performs low-frequency mixing processing on the first path of signal to be measured according to the local oscillation signal, so as to obtain a low-frequency signal to be measured, so that the output end of the low-frequency band mixing module 410 outputs the low-frequency signal to be measured to the intermediate-frequency filtering module 50. After receiving the local oscillation signal and the second path of signal to be measured sent by the local oscillation module 420, the input end of the high-frequency band mixing module 430 further carries out high-frequency mixing processing on the second path of signal to be measured according to the local oscillation signal, so as to obtain a high-frequency signal to be measured, and the output end of the high-frequency band mixing module 430 outputs the high-frequency signal to be measured to the intermediate-frequency filtering module 50. After receiving the low-frequency signal to be tested and the high-frequency signal to be tested, the input end of the intermediate frequency filtering module 50 may further perform intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested, so as to obtain an intermediate frequency signal to be tested.
In an alternative implementation of the embodiment of the present invention, the signal processing system may further include a third signal amplifying module 80; the input end of the third signal amplifying module 80 is electrically connected to the output end of the intermediate frequency filtering module 50, and the output end is electrically connected to an AD (analog-to-digital conversion) processing module 90, for amplifying the intermediate frequency signal to be tested to obtain a target signal to be tested.
Wherein the third signal amplification module 80 may be a further module for amplifying the signal. The AD processing module 90 may be a module for performing analog-to-digital conversion processing on a signal.
Optionally, the intermediate frequency signal to be tested can be amplified again through the third signal amplifying module so as to test the signal to be tested. Correspondingly, after the intermediate frequency filter module 50 outputs the intermediate frequency signal to be tested, the input end of the third signal amplifying module 80 may receive the intermediate frequency signal to be tested, and further amplify the intermediate frequency signal to be tested to obtain the target signal to be tested, so that the output end of the third signal amplifying module 80 outputs the target signal to be tested to the AD processing module 90, and the AD processing module 90 may further test the target signal to be tested.
In an alternative implementation of the embodiment of the present invention, the first signal amplifying module 10 may include a low noise amplifying module 110; the low noise amplifier module 110 may be configured to receive a signal to be tested sent by the antenna, and amplify the signal to be tested.
The low noise amplifier module 110 may be configured to amplify a signal received from the antenna, so that a subsequent electronic device may further process the signal. It will be appreciated that the signal from the antenna is generally very weak, and further processing is required after the signal is amplified, and the low noise amplifier module 110 is generally located near the antenna to reduce the loss of the signal due to transmission.
Alternatively, when the signal to be measured is a signal from an antenna, the low noise amplification module 110 may be employed as the first signal amplification module 10 of the signal processing system. Accordingly, the low noise amplifier module 110 of the signal processing system may receive the signal to be detected sent by the antenna, and amplify the signal to be detected.
In an alternative implementation of the embodiment of the present invention, the signal to be measured may include at least one of a 4G signal and a 5G signal.
Specifically, the signal to be measured may be a 4G (fourth generation mobile communication technology) signal, a 5G (fifth generation mobile communication technology) signal, or may be 4G and 5G signals, which is not limited in this embodiment of the present invention.
It should be noted that many signal testing devices can only test 4G signals, and the signal frequency band emitted by the 4G base station is 800-2700MHz. Whereas the frequency band of the 5G signal is wider and higher. The definition of 3GPP (third Generation partnership project) for the 5G band range is FR1 and FR2. The frequency range FR1 is the so-called 5G Sub-6GHz (below 6 GHz) band, and the frequency range FR2 is the 5G millimeter wave band. The existing outdoor base stations are basically in FR1 frequency band. Thus, the test frequency band of many existing signal test equipment needs to be extended from 800-2700MHz to 800-6000MHz to realize the test of 4G signals and 5G signals.
In the embodiment of the invention, the first radio frequency switch module is arranged in the signal processing system, and different sub-signals of various frequency bands can be screened out from the broadband signal through the first radio frequency switch module, so that the sub-signals are further processed, further the broadband signal is processed, and the processed broadband signal meets the test requirement.
According to the technical scheme, a signal processing system is formed by a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a frequency mixing module and an intermediate frequency filtering module, the system receives a signal to be tested through the first signal amplifying module, amplifies the signal to be tested to obtain the amplified signal to be tested, filters the amplified signal to be tested by the first filtering module to obtain the filtered signal to be tested, amplifies and attenuates the filtered signal to be tested by the amplifying and attenuating module to obtain the amplified and attenuated signal to be tested, further mixes the amplified and attenuated signal to be tested by the frequency mixing module to obtain the mixed signal to be tested, and performs intermediate frequency filtering processing on the mixed signal to be tested by the intermediate frequency filtering module to obtain the intermediate frequency signal to be tested, so that the problem that the existing signal cannot meet testing requirements under the condition that the signal index meets standards is solved, the high-frequency signal to be tested is converted into the intermediate frequency signal to be tested which can be used for testing, and the testing requirements of the signal to be tested are met.
Example two
Fig. 4 is a flowchart of a signal processing method according to a second embodiment of the present invention, where the method may be performed by a signal processing system, and the system may be implemented in a software/hardware manner. The signal processing system comprises a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a mixing module and an intermediate frequency filtering module. Accordingly, as shown in fig. 4, the method includes the steps of:
s410, receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested.
In the embodiment of the invention, the first signal amplifying module can receive the signal to be tested and amplify the signal to be tested to obtain the amplified signal to be tested, so that the output end of the first signal amplifying module outputs the amplified signal to be tested to the first filtering module to further process the amplified signal to be tested.
Optionally, receiving a signal to be measured, and amplifying the signal to be measured, and may further include: and receiving a signal to be detected sent by an antenna, and amplifying the signal to be detected.
Specifically, a low-noise amplification module in a first signal amplification module of the signal processing system receives a signal to be detected sent by an antenna and amplifies the signal to be detected.
Alternatively, the signal to be measured may include at least one of a 4G signal and a 5G signal.
Specifically, the signal to be measured may be a 4G signal, a 5G signal, or both 4G and 5G signals, which is not limited in the embodiment of the present invention.
S420, filtering the amplified signal to be tested to obtain a filtered signal to be tested.
In the embodiment of the invention, after the input end of the first filtering module receives the amplified signal to be tested, filtering processing can be further performed on the amplified signal to be tested so as to obtain the filtered signal to be tested, so that the output end of the first filtering module outputs the filtered signal to be tested to the amplifying and attenuating module so as to further process the filtered signal to be tested.
Optionally, filtering the amplified signal to be tested may include: and screening and filtering the sub-signals of the amplified signals to be tested according to the signal testing requirements to obtain the filtered signals to be tested.
Specifically, after the output end of the first signal amplifying module outputs the amplified signal to be tested, the input end of the first radio frequency switch module may receive the amplified signal to be tested, and perform screening and filtering processing on the amplified signal to be tested in different frequency bands according to the signal testing requirement, that is, select the switch branch of the corresponding first radio frequency switch module according to the amplified signal to be tested in different frequency bands, so that the first filtering module corresponding to the frequency band of the amplified signal to be tested performs screening and filtering processing on the amplified signal to be tested, so as to obtain the filtered signal to be tested.
S430, amplifying and attenuating the filter signal to be tested to obtain an amplified and attenuated signal to be tested.
In the embodiment of the invention, after the input end of the amplifying and attenuating module receives the filtering signal to be tested, the filtering signal to be tested can be further amplified and attenuated to obtain the amplifying and attenuating signal to be tested, so that the output end of the amplifying and attenuating module outputs the amplifying and attenuating signal to be tested to the mixing module to further process the amplifying and attenuating signal to be tested.
Optionally, amplifying and attenuating the filtered signal to be tested may include: and amplifying and attenuating the filtered signal to be tested according to the configured attenuation and amplification parameters to obtain the amplified and attenuated signal to be tested.
Specifically, after the first filtering module outputs the filtering signal to be tested, the input end of the power amplifier with the numerical control attenuator of the amplifying and attenuating module can receive the filtering signal to be tested, and further amplifying and attenuating the filtering signal to be tested according to the pre-configured attenuation and amplifying parameters so as to obtain the amplifying and attenuating signal to be tested.
Optionally, amplifying and attenuating the filtered signal to be tested may include: carrying out attenuation treatment on the filter signal to be tested according to the configured attenuation parameters to obtain an attenuation signal to be tested; and amplifying the attenuation signal to be tested again to obtain the amplified attenuation signal to be tested.
Specifically, after the first filtering module outputs the filtering signal to be tested, the input end of the programmable attenuation module of the amplifying attenuation module can receive the filtering signal to be tested, and further attenuation processing is performed on the filtering signal to be tested according to the configured attenuation parameters so as to obtain the attenuation signal to be tested, so that the output end of the programmable attenuation module can send the attenuation signal to be tested to the input end of the second signal amplifying module, and after the input end of the second signal amplifying module receives the attenuation signal to be tested, amplification processing is performed on the attenuation signal to be tested again so as to obtain the amplifying attenuation signal to be tested, and the amplifying attenuation signal to be tested is output to the mixing module.
S440, carrying out frequency mixing processing on the amplified and attenuated signal to be tested to obtain a frequency mixing signal to be tested.
In the embodiment of the invention, after the input end of the frequency mixing module receives the amplified and attenuated signal to be tested, the amplified and attenuated signal to be tested can be further subjected to frequency mixing processing to obtain the frequency mixing signal to be tested, so that the output end of the frequency mixing module outputs the frequency mixing signal to be tested to the intermediate frequency filtering module to further process the frequency mixing signal to be tested.
S450, performing intermediate frequency filtering processing on the mixed signal to be tested to obtain an intermediate frequency signal to be tested.
In the embodiment of the invention, after the input end of the intermediate frequency filtering module receives the mixed signal to be tested, intermediate frequency filtering processing can be further carried out on the mixed signal to be tested so as to obtain the intermediate frequency signal to be tested, so that the output end of the intermediate frequency filtering module outputs the intermediate frequency signal to be tested so as to test the intermediate frequency signal to be tested.
Optionally, performing mixing processing on the amplified and attenuated signal to be tested may include: carrying out branching treatment on the amplified and attenuated signals to be tested to obtain a first path of signals to be tested and a second path of signals to be tested; performing low-frequency mixing processing on the first path of signals to be detected according to the local oscillation signals to obtain low-frequency signals to be detected; and carrying out low-frequency mixing processing on the second path of signal to be detected according to the local oscillation signal to obtain a high-frequency signal to be detected. The performing intermediate frequency filtering processing on the mixed signal to be tested may include: and performing intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain the intermediate frequency signal to be tested.
Specifically, when the mixing processing is performed on the amplified and attenuated signal to be tested, after the input end of the second radio frequency switch module receives the amplified and attenuated signal to be tested, the signal to be tested is further subjected to branching processing to obtain a first path of signal to be tested and a second path of signal to be tested, so that the output end of the second radio frequency switch module outputs the first path of signal to be tested to the input end of the low-frequency band mixing module, and outputs the second path of signal to be tested to the input end of the high-frequency band mixing module. After receiving the local oscillation signal and the first path of signal to be measured sent by the local oscillation module, the input end of the low-frequency band mixing module further carries out low-frequency mixing processing on the first path of signal to be measured according to the local oscillation signal so as to obtain the low-frequency signal to be measured, and the output end of the low-frequency band mixing module outputs the low-frequency signal to be measured to the intermediate-frequency filtering module. After receiving the local oscillation signal and the second path of signal to be measured sent by the local oscillation module, the input end of the high-frequency band mixing module further carries out high-frequency mixing processing on the second path of signal to be measured according to the local oscillation signal so as to obtain the high-frequency signal to be measured, and the output end of the high-frequency band mixing module outputs the high-frequency signal to be measured to the intermediate-frequency filtering module. After receiving the low-frequency signal to be tested and the high-frequency signal to be tested, the input end of the intermediate-frequency filtering module can further perform intermediate-frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested so as to obtain the intermediate-frequency signal to be tested.
Optionally, the signal processing method may further include: and amplifying the intermediate frequency signal to be tested to obtain a target signal to be tested.
Specifically, after the intermediate frequency filter module outputs the intermediate frequency signal to be tested, the input end of the third signal amplifying module can receive the intermediate frequency signal to be tested, and further amplify the intermediate frequency signal to be tested to obtain the target signal to be tested, so that the output end of the third signal amplifying module outputs the target signal to be tested to the AD processing module, and further the target signal to be tested can be tested.
In order to enable those skilled in the art to better understand the signal processing method of the present embodiment, a specific example is described below, and fig. 5 is a flowchart of a specific example of a signal processing method provided in the second embodiment of the present invention, and as shown in fig. 5, a specific process includes:
the antenna receives radio frequency signals (the frequency is F1), the radio frequency signals are amplified by the first signal amplifying module, the first filtering module can be a band-pass filter by using the first radio frequency switching module and the first filtering module, the out-of-band useless signals can be restrained by at least 40dB, the out-of-band clutter is restrained and then the out-of-band useless signals are input to the frequency mixing module, the local oscillator signals with the frequency of F2 are input to the frequency mixing module, and the frequency mixing module respectively work in a high frequency part and a low frequency part, namely a low frequency band frequency mixing module and a high frequency band frequency mixing module. The mixing module outputs intermediate frequency signals (F1-F2), and the signals are output to the AD processing module after passing through the intermediate frequency filtering module and the third signal amplifying module, so that the whole processing flow of converting the high-frequency signals into intermediate frequency signals is completed.
According to the technical scheme, the first signal amplifying module is used for receiving signals to be tested, amplifying the signals to be tested to obtain amplified signals to be tested, the first filtering module is used for filtering the amplified signals to be tested to obtain filtered signals to be tested, the amplifying and attenuating module is used for amplifying and attenuating the filtered signals to be tested to obtain amplified and attenuated signals to be tested, the frequency mixing module is further used for carrying out frequency mixing on the amplified and attenuated signals to be tested to obtain mixed signals to be tested, the intermediate frequency filtering module is used for carrying out intermediate frequency filtering on the mixed signals to be tested to obtain intermediate frequency signals to be tested, the problem that the existing signals cannot meet testing requirements under the condition that the signal index meets the standard is solved, and the high-frequency signals to be tested are converted into intermediate frequency signals to be tested under the condition that the signal index meets the standard, so that the testing requirements of the signals to be tested are met.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. The signal processing system is characterized by comprising a first signal amplifying module, a first filtering module, an amplifying and attenuating module, a second radio frequency switch module, a mixing module and an intermediate frequency filtering module, wherein:
the output end of the first signal amplification module is electrically connected with the input end of the first filtering module and is used for receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
the output end of the first filtering module is electrically connected with the input end of the amplifying and attenuating module and is used for filtering the amplified signal to be tested to obtain a filtered signal to be tested;
the output end of the amplification and attenuation module is electrically connected with the input end of the mixing module, the amplification and attenuation module comprises a power amplifier with a numerical control attenuator, and the power amplifier with the numerical control attenuator is used for amplifying and attenuating the filtered signal to be tested according to attenuation and amplification parameters to obtain an amplified and attenuated signal to be tested; the attenuation and amplification parameters are preconfigured according to the scene so as to control the signal attenuation and amplification value;
the input end of the second radio frequency switch module is electrically connected with the output end of the amplification attenuation module and is used for carrying out branching treatment on the amplification attenuation signal to be tested to obtain a first path of signal to be tested and a second path of signal to be tested;
the output end of the frequency mixing module is electrically connected with the input end of the intermediate frequency filtering module and is used for carrying out frequency mixing treatment on the amplified and attenuated signal to be tested to obtain a frequency mixing signal to be tested; the frequency mixing module comprises a low-frequency band frequency mixing module, a high-frequency band frequency mixing module and a local oscillation module; the local oscillation module is used for generating local oscillation signals and carrying out frequency mixing processing on the signals; the output end of the second radio frequency switch module is electrically connected with the input end of the low-frequency band mixing module and is electrically connected with the input end of the high-frequency band mixing module; the low-frequency band mixing module is used for carrying out low-frequency mixing processing on the first path of signals to be detected according to the local oscillation signals to obtain low-frequency signals to be detected; the high-frequency band mixing module is used for carrying out high-frequency mixing processing on the second path of signals to be detected according to the local oscillator signals to obtain high-frequency signals to be detected;
and the intermediate frequency filtering module is used for performing intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain an intermediate frequency signal to be tested.
2. The system of claim 1, further comprising a first radio frequency switch module; the number of the first filtering modules is the same as the number of switching paths of the first radio frequency switching modules;
the input end of the first radio frequency switch module is electrically connected with the first signal amplifying module, the output end of the first radio frequency switch module is electrically connected with each first filtering module, and the first radio frequency switch module is used for screening and filtering sub-signals of the amplified signals to be tested according to signal testing requirements to obtain the filtered signals to be tested.
3. The system of claim 1, wherein the amplification and attenuation module comprises a programmable attenuation module and a second signal amplification module;
the input end of the programmable attenuation module is electrically connected with the output end of the first filtering module and is used for carrying out attenuation treatment on the filtering signal to be tested according to the configured attenuation parameters to obtain an attenuation signal to be tested;
and the input end of the second signal amplification module is electrically connected with the output end of the attenuation module, and the output end of the second signal amplification module is electrically connected with the input end of the frequency mixing module and is used for amplifying the attenuation signal to be tested again to obtain the amplification attenuation signal to be tested.
4. The system of claim 1, wherein the input of the low-band mixing module is electrically connected to the output of the second rf switch module and to the output of the local oscillator module, and the output is electrically connected to the input of the intermediate frequency filter module;
the input end of the high-frequency band mixing module is electrically connected with the output end of the second radio frequency switch module, and is electrically connected with the output end of the local oscillation module, and the output end of the high-frequency band mixing module is electrically connected with the input end of the intermediate frequency filtering module.
5. The system of any of claims 1-4, further comprising a third signal amplification module;
and the input end of the third signal amplification module is electrically connected with the output end of the intermediate frequency filtering module, and the output end of the third signal amplification module is electrically connected with the AD processing module and is used for amplifying the intermediate frequency signal to be tested to obtain a target signal to be tested.
6. The system of claim 5, wherein the first signal amplification module comprises a low noise amplification module;
the low-noise amplification module is used for receiving the signal to be detected sent by the antenna and amplifying the signal to be detected.
7. The system of claim 6, wherein the signal under test comprises at least one of a 4G signal and a 5G signal.
8. A signal processing method, applied to a signal processing system, comprising:
receiving a signal to be tested, and amplifying the signal to be tested to obtain an amplified signal to be tested;
filtering the amplified signal to be tested to obtain a filtered signal to be tested;
amplifying and attenuating the filter signal to be tested according to the attenuation and amplification parameters to obtain an amplified and attenuated signal to be tested; the attenuation and amplification parameters are preconfigured according to the scene so as to control the signal attenuation and amplification value;
carrying out branching treatment on the amplified and attenuated signals to be tested to obtain a first path of signals to be tested and a second path of signals to be tested;
generating a local oscillation signal, and carrying out frequency mixing treatment on the signal;
performing low-frequency mixing processing on the first path of signals to be detected according to the local oscillation signals to obtain low-frequency signals to be detected;
carrying out high-frequency mixing processing on the second path of signal to be detected according to the local oscillation signal to obtain a high-frequency signal to be detected;
and performing intermediate frequency filtering processing on the low-frequency signal to be tested and the high-frequency signal to be tested to obtain an intermediate frequency signal to be tested.
9. The method of claim 8, wherein the filtering the amplified signal to be tested comprises:
and screening and filtering the sub-signals of the amplified signals to be tested according to the signal testing requirements to obtain the filtered signals to be tested.
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