CN111654333A - Wireless signal generation method and wireless signal generation device - Google Patents
Wireless signal generation method and wireless signal generation device Download PDFInfo
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Abstract
The present application relates to a wireless signal generation method and a wireless signal generation apparatus. The wireless signal generation method includes acquiring a waveform file of an original signal. And editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in the original waveform file of the original signal to generate a target waveform file. And generating a target signal according to the target waveform file. According to different wireless equipment test requirements, the wireless signal generation method generates wireless signals required by tests by editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in an original waveform file.
Description
Technical Field
The present disclosure relates to the field of radio measurement and testing technologies, and in particular, to a wireless signal generating method and a wireless signal generating apparatus.
Background
With the development and the demand of applications such as smart cities, smart homes, industrial control systems, medical health and traffic management, smart power grids and the like, the number of wireless devices is rapidly increased, mutual interference inevitably exists between the wireless devices when the wireless devices work in the same environment, the network quality is influenced, and even normal communication cannot be realized. For example, the system is applied to wireless systems such as WiFi and ZigBee in ISM frequency band, 5G-NR and satellite fixed service wireless systems in sub-6GHz frequency band, aviation ranging signals and digital aviation communication systems in L wave band, and the like.
Therefore, the wireless device needs to be subjected to interference resistance and coexistence with other wireless systems in the stages of development, production and the like. For example, according to the C63.27 standard, the coexistence capability of a wireless device needs to be tested by using a signal source to generate an interference signal, and whether the wireless device can normally operate when multiple wireless signals coexist in a test environment is tested. Therefore, how to generate a suitable test signal to satisfy the requirement of multi-signal comprehensive simulation and high-accuracy test is an urgent problem to be solved.
Disclosure of Invention
In view of the above, it is necessary to provide a wireless signal generating method and a wireless signal generating apparatus for solving the problem of how to generate a test interference signal.
A wireless signal generation method includes acquiring a waveform file of an original signal. And editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in the original waveform file of the original signal to generate a target waveform file. And generating a target signal according to the target waveform file.
In one embodiment, the original signal is plural. The original signals correspond to the original waveform files one by one. And editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in the plurality of original waveform files to generate the target waveform file.
In one embodiment, editing the time domain of the original signal waveform file comprises: and editing the sampling rate and the duration time in the original signal waveform file.
In one embodiment, the sampling rate in a plurality of the original signal waveform files is the same and the duration in a plurality of the original signal waveform files is the same.
In one embodiment, editing the original signal waveform file in the frequency domain comprises: the plurality of original signal waveform files contain a plurality of frequencies of the original signals in one-to-one correspondence. The plurality of frequencies are different from each other two by two.
In one embodiment, the step of generating a target signal from the target waveform file comprises:
and generating an intermediate frequency signal according to the target waveform file, wherein the intermediate frequency signal is an IQ signal.
And generating the target signal according to the intermediate frequency signal, wherein the target signal is a radio frequency signal.
In one embodiment, the method for obtaining the waveform file of the original signal comprises the steps of collecting a real signal in an environment, and analyzing the real signal to obtain the waveform file of the original signal.
In one embodiment, a method of obtaining a waveform file of an original signal includes obtaining a waveform file of an ideal signal.
In one embodiment, the wireless signal generating method further comprises performing an accuracy test on the target signal, and if the accuracy is greater than a set value, adjusting one or more physical layer parameters in a coding, modulation, frequency domain or time domain of the target signal.
A wireless signal generating apparatus includes a central controller, a waveform generator, and a vector signal generator. The central controller is used for acquiring a waveform file of an original signal, editing the waveform file of the original signal and generating a target waveform file. The waveform generator is connected with the central controller. The waveform generator is used for receiving the target waveform file and generating an intermediate frequency signal according to the target waveform file. The intermediate frequency signal is an IQ signal. The vector signal generator is connected with the waveform generator. The waveform generator is used for receiving the intermediate frequency signal and generating a target signal according to the intermediate frequency signal.
In one embodiment, the wireless signal generating device further comprises a receiving device and a spectrum analyzer. The receiving device is connected with the spectrum analyzer. The spectrum analyzer is connected with the central controller. The receiving device is used for acquiring real signals in the environment. And the spectrum analyzer is used for analyzing the real signal to obtain a waveform file of the original signal.
The wireless signal generation method provided by the embodiment of the application comprises the step of acquiring a waveform file of an original signal. And editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in the original waveform file of the original signal to generate a target waveform file. And generating a target signal according to the target waveform file. According to different wireless equipment test requirements, the wireless signal generation method generates wireless signals required by tests by editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in an original waveform file.
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In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of the wireless signal generation method provided in an embodiment of the present application;
FIG. 2 is a diagram illustrating the actual effect of a combined signal of three signals provided in an embodiment of the present application;
FIG. 3 is a diagram illustrating the effect of modulating a combined signal to adjacent channels according to an embodiment of the present application;
fig. 4 is a schematic electrical connection diagram of the wireless signal generating device provided in an embodiment of the present application.
Description of reference numerals:
wireless signal generating device 10
Receiving device 50
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
The numbering of the components as such, e.g., "first", "second", etc., is used herein for the purpose of describing the objects only, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
With the development and demand of smart cities, smart homes, industrial control systems, medical health and traffic management, smart power grids and other applications, the number of wireless devices is rapidly increased, and the working electromagnetic environment is more complex, so that the problem of mutual interference among the wireless devices is brought. Common wireless devices include WiFi in ISM band, ZigBee, 5G-NR and satellite fixed services or aviation ranging signal and digital aviation communication system, etc. In order to ensure that different wireless devices can work properly in the same environment, the coexistence capability of the wireless devices needs to be tested, for example, in the C63.27 standard, an interference signal source is used for testing.
Referring to fig. 1, in order to meet the requirement of signal simulation in a complex wireless communication environment, it is necessary to generate commercial wireless signals such as LTE, WiFi, and the like, and general wireless signals such as MPSK, MQAM, and the like at the same time, and the physical layer parameters are adjustable and have high signal quality. The embodiment of the application provides a wireless signal generation method. The wireless signal generation method includes:
s100, acquiring a waveform file of the original signal.
S200, editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in the original waveform file of the original signal to generate a target waveform file.
And S300, generating a target signal according to the target waveform file.
According to the wireless signal generation method provided by the embodiment of the application, according to different wireless equipment test requirements, one or more physical layer parameters in a coding, modulation, frequency domain or time domain and the like are edited to generate the wireless signal required by the test.
The signal types of the original signals comprise standard signals such as WiFi, LTE and ZigBee and general signals such as MPSK and MQAM.
In one embodiment, the method for acquiring the waveform file of the original signal in S100 includes acquiring a real signal in an environment, and analyzing the real signal to obtain the waveform file of the original signal. In one embodiment, the real signal may be received by an antenna and parsed by a spectrum analyzer to generate a waveform file corresponding to the real signal. The real signals include but are not limited to standard signals such as WiFi, LTE, ZigBee and the like and general signals such as MPSK, MQAM and the like.
In one embodiment, the method of obtaining a waveform file of the original signal in S100 includes obtaining a waveform file of the ideal signal. The waveform file of the ideal signal may be a waveform generation file recorded in a storage medium. The ideal signals include but are not limited to standard signals such as WiFi, LTE, ZigBee and the like and general signals such as MPSK, MQAM and the like.
After the ideal signal file is loaded into the waveform generator or vector generator, the waveform generator or vector generator will emit a signal. The signal is not exactly the same as the ideal signal. Errors can also occur during signal propagation and acquisition.
In one embodiment, a typical 16QAM signal is designed, Gray code coding is adopted, a time length is 20 mus, a cosine-rising filter with a roll-off coefficient of 0.35 is adopted, a symbol rate is 25Msym/s, a sampling rate is 10GSa/s, a carrier frequency is 2.5GHz, the theoretical value of EVM is 0.008%, the actual test result is 0.96%, and the test requirement is met.
In one embodiment, the original signal is plural. The original signals correspond to the original waveform files one by one. And S100, editing one or more physical layer parameters in coding, modulation, frequency domain and time domain in the original waveform files to generate the target waveform file. And generating IQ signals by the target waveform file generated by the plurality of original waveform files through a waveform generator. The IQ signal is input to a vector generator to generate a target signal. The target signal is used for simulating an environment where multiple wireless signals coexist and testing the coexistence capability of the wireless equipment.
The wireless signal generation method can be used for testing the coexistence capability of wireless equipment in frequency bands such as ISM frequency band, 5G-NR frequency band, L frequency band and the like.
The original signals may all be real signals or may all be ideal signals.
One or several of the original signals are real signals and the rest are ideal signals.
In one embodiment, editing the time domain parameters of the original signal waveform file comprises: and editing the sampling rate and the duration time in the original signal waveform file.
In one embodiment, the sampling rate in a plurality of the original signal waveform files is the same and the duration in a plurality of the original signal waveform files is the same.
In one embodiment, editing the frequency domain parameters of the original signal waveform file comprises: the original signal waveform files contain a plurality of parameters such as frequency, bandwidth and power of the original signals in one-to-one correspondence. The frequency, bandwidth, power and the like are designed according to the characteristics and test requirements of the wireless equipment, and can be same frequency or adjacent frequency, whether channels are overlapped, relative power among signals and the like.
In one embodiment, S300 includes:
s310, generating an intermediate frequency signal according to the target waveform file, wherein the intermediate frequency signal is an IQ signal.
And S320, generating the target signal according to the intermediate frequency signal, wherein the target signal is a radio frequency signal.
Referring to fig. 2 and fig. 3 together, in one embodiment, mobile communication signals of three different systems, namely GSM, WCDMA and LTE, are synthesized. The number of the original signals is 3. The GSM signal is obtained by acquiring a real signal form through an antenna. And obtaining a waveform file corresponding to the GSM signal through a spectrum analyzer. WCDMA and LTE are ideal signals. The ideal signal files of WCDMA and LTE are acquired through a storage medium respectively.
The sampling rate of the GSM signal is 10 MSa/s. The sampling rates in the original waveform files corresponding to the WCDMA and LTE are 15.36MSa/s and 30.72MSa/s respectively. After resampling, the sampling rates of GSM, WCDMA and LTE are the same, for example 153.6MSa/s, and signal segments of the same duration are clipped. Firstly, the GSM, WCDMA and LTE signals are respectively adjusted to the intermediate frequency from the baseband frequency. This is done by setting the frequency parameters in the waveform file.
The GSM signal is up-regulated to 10MHz, the WCDMA signal is up-regulated to 20MHz, and the LTE signal is up-regulated to 50MHz, so that the frequencies of the three signals are close to simulate adjacent channel interference.
And integrating a plurality of adjusted original signal waveform files into one target waveform file. And inputting the target waveform file to a waveform generator. The waveform generator outputs IQ signals to the vector signal generator, and the vector signal generator modulates target signals to 2GHz radio frequency and generates radio frequency signals.
The method can be seen as combining the 2G, 3G and 4G signals with three frequency bands separated in the same frequency band, and the channel power can be adjusted at will. Therefore, the wireless signal generation method can simulate adjacent channel signal interference, co-channel signal interference and the strength of interference signals at will.
The wireless signal generation method enables parameters such as frequency, bandwidth, sampling rate, modulation mode and the like of a target signal to be randomly adjustable, and is suitable for simulating coexistence environments of various wireless devices. The signal generation can be performed according to the relevant specifications or standards of the required wireless signal, and the real environment signal can be collected and played back.
In one embodiment, step S310 is further included. And carrying out pre-distortion treatment on the waveform generated by the target waveform file. The predistortion treatment is to artificially add a system with the characteristics opposite to the nonlinear distortion of the system for mutual compensation, so that the stability problem does not exist, and the bandwidth is larger. The method is mainly applied to the field of 5G ultra-wideband modulation signals. Due to the nonlinearity of devices such as ADC and the like, the amplitude and the phase are not flat in a wide frequency band (more than 1 GHz), and the signal quality is influenced. The unevenness of the amplitude and the phase of the arbitrary waveform signal generator is improved, and the signal quality is improved, so that the test requirement of wide bandwidth signal application is met.
In one embodiment, the wireless signal generation method further comprises:
s400, performing signal quality test on the target signal, and if the signal has distortion, namely the modulation quality is greater than a set value, adjusting one or more of parameters of the target signal, such as coding, modulation, frequency domain or time domain, and the like, for an ideal signal.
In one embodiment, the set value is 0.3% to 1.3%. The set value corresponds to an allowable value of the calibration standard. The set value is related to the signal type of the wireless device to be tested.
A target signal in an environment is received by a signal. And carrying out demodulation test on the target signal through a spectrum analyzer.
In the above embodiment, the EVMs of the theoretical synthesized signals WCDMA and LTE are 0.56% and 1.15%, respectively, which both meet the requirements of the relevant calibration standard in the field of digital communication measurement equipment. Therefore, the device has the advantages of high accuracy of the generated signals, controllable signal types and adjustable multi-parameter, and can be used for the coexistence test of the wireless equipment.
Compared with the prior art, the wireless signal generation method can collect real signals in the environment as original signals, can also obtain files of relevant ideal signals stored in a medium, and improves the application range of the wireless signal generation method.
When the real signals cannot be acquired in a closed experimental environment, the wireless signal generation method can still generate target signals by acquiring waveform files of a plurality of ideal signals, and simulate various complex wireless signal environments.
The wireless signal generation method improves the adjustability of the target signal and widens the test range of the wireless equipment by editing the waveform file of the target signal.
The wireless signal generation method also comprises the steps of collecting, detecting and adjusting the target signal, so that a feedback mechanism for adjusting the target signal is formed, and the quality of the target signal is convenient to monitor in real time. The wireless signal generation method realizes the adjustment of the waveform file of the target signal according to the detection result so as to meet the test requirement of the wireless equipment.
Wherein the adjusting of the waveform file comprises editing one or more of the encoding mode, the modulation mode, the frequency domain or the time domain. Editing the time domain includes adjustments to acquisition rate and duration. The editing of the frequency domain includes an adjustment of the frequency and an adjustment of the bandwidth.
It should be understood that, although the steps in the above flowcharts are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in the flow chart may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of execution of the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
Referring to fig. 4, the present embodiment provides a wireless signal generating apparatus 10 including a central controller 20, a waveform generator 30 and a vector signal generator 40. The central controller 20 is configured to obtain a waveform file of an original signal, edit the waveform file of the original signal, and generate a target waveform file. The waveform generator 30 is connected to the central controller 20. The waveform generator 30 is configured to receive the target waveform file and generate an intermediate frequency signal according to the target waveform file. The intermediate frequency signal is an IQ signal. The vector signal generator 40 is connected to the waveform generator 30. The waveform generator 30 is configured to receive the intermediate frequency signal and generate a target signal according to the intermediate frequency signal.
The wireless signal generating apparatus 10 edits the waveform file of the original signal through the central controller 20 to generate a target waveform file. And then transmits a target signal through the waveform generator 30 and the vector signal generator 40. The wireless signal generating device 10 is capable of generating a target signal of a test requirement.
In one embodiment, the central controller 20 edits one or more physical layer parameters in the encoding, modulation, frequency domain or time domain of the original waveform file of the original signal to generate the wireless signal required for the test.
In one embodiment, the central controller 20 is configured to obtain a waveform file of the original signal according to the signal type and the signal source of the original signal.
The central controller 20, the waveform generator 30 and the vector signal generator 40 are connected by a GPIB bus.
In one embodiment, the central controller 20 comprises a computer, processor, CPU or other device having storage and processing capabilities.
In one embodiment, the waveform generator 30 comprises an arbitrary waveform generator.
The arbitrary waveform generator simulates the bandwidth of 6GHz and the sampling rate of 25GS/s, and can generate IQ signals with high accuracy. The vector signal generator has the frequency of 6GHz and the bandwidth of 160MHz, and meets the requirements of common coexistence test frequency band radio frequency signals of an ISM frequency band, a 5G sub-6GHz and the like. The device can be directly used for conduction testing, and for the radiation testing condition, a transmitting antenna can be added to complete the testing. In addition, the frequency range and the bandwidth of the vector signal generator can be further expanded to adapt to the test of millimeter wave application.
The signal types of the original signals comprise standard signals such as WiFi, LTE and ZigBee and general signals such as MPSK and MQAM.
In one embodiment, the wireless signal generating device 10 further comprises a receiving device 50 and a spectrum analyzer 60. The receiving means 50 is connected to the spectrum analyzer 60. The spectrum analyzer 60 is connected to the central controller 20. The receiving device 50 is used for collecting real signals in the environment. The spectrum analyzer 60 is configured to analyze the real signal to obtain a waveform file of the original signal.
The receiving means 50 comprise an antenna.
The real signals include but are not limited to standard signals such as WiFi, LTE, ZigBee and the like and general signals such as MPSK, MQAM and the like.
In one embodiment, the central controller 20 further comprises a memory module. The original signal is an ideal signal. And the waveform file of the ideal signal is stored in the waveform generation file in the storage module. The ideal signals include but are not limited to standard signals such as WiFi, LTE, ZigBee and the like and general signals such as MPSK, MQAM and the like.
When the ideal signal file is loaded in the waveform generator or vector generator, the waveform generator or vector generator will emit a signal. The signal is not exactly the same as the ideal signal. Errors can also occur during signal propagation and acquisition.
In one embodiment, the central controller 20 is configured to acquire a plurality of waveform files of the original signal. The original waveform files correspond to the original signals one by one. The central controller 20 is configured to edit one or more physical layer parameters in coding, modulation, frequency domain, or time domain in the plurality of original waveform files, so as to generate the target waveform file. And generating IQ signals by the target waveform file generated by the plurality of original waveform files through a waveform generator. The IQ signal is input to a vector generator to generate a target signal. The target signal is used for simulating an environment where multiple wireless signals coexist and testing the coexistence capability of the wireless equipment.
The wireless signal generating apparatus 10 can be used for testing the coexistence capability of wireless devices in ISM band, 5G-NR band, L band, and other bands.
The original signals may all be real signals or may all be ideal signals.
One or several of the original signals are real signals and the rest are ideal signals.
One or several of the original signals are ideal signals and the rest are real signals.
In one embodiment, the central controller 20 editing the time domain of the original signal waveform file includes: and editing the sampling rate and the duration time in the original signal waveform file.
In one embodiment, the sampling rate in the plurality of original signal waveform files is the same and the duration in the plurality of original signal waveform files is the same by the central controller 20.
In one embodiment, the central controller 20 editing the original signal waveform file in the frequency domain includes: the plurality of original signal waveform files contain a plurality of frequencies of the original signals in one-to-one correspondence. The plurality of frequencies are different from each other two by two.
In one embodiment, the wireless signal generating device 10 is used for synthesizing mobile communication signals of three different standards, namely GSM, WCDMA and LTE. The number of the original signals is 3. Wherein the GSM signal is obtained by said receiving means 50 in the form of a real signal acquisition. The waveform file corresponding to the GSM signal is obtained by the spectrum analyzer 60. WCDMA and LTE are ideal signals. And obtaining the ideal signal files of the WCDMA and the LTE respectively through the storage module.
The sampling rate of the GSM signal is 10 MSa/s. The sampling rates in the original waveform files corresponding to the WCDMA and LTE are 15.36MSa/s and 30.72MSa/s respectively. The sampling of GSM, WCDMA and LTE is the same duration. Firstly, the GSM, WCDMA and LTE signals are respectively adjusted to the intermediate frequency from the baseband frequency. This step is accomplished by the central controller 20 setting the frequency parameters in the waveform file.
In one embodiment, the GSM signal is up-regulated to 10 MHz. The WCDMA signal is up-regulated to 20 MHz. The LTE signal is up-regulated to 50 MHz. The frequencies of the three signals are different from each other two by two.
The central controller 20 integrates the adjusted original signal waveform files into one target waveform file. The frequency in the target waveform file is an intermediate frequency.
The central controller 20 inputs the target waveform file to the waveform generator 30. The waveform generator 30 outputs IQ signals to the vector signal generator 40, and the vector signal generator 40 modulates target signals to 2GHz radio frequency and generates radio frequency signals.
The method can be seen as combining the 2G, 3G and 4G signals with three frequency bands separated in the same frequency band, and the channel power can be adjusted at will. Therefore, the wireless signal generation method can simulate adjacent channel signal interference, co-channel signal interference and the strength of interference signals at will.
The wireless signal generation method enables parameters such as frequency, bandwidth, sampling rate, modulation mode and the like of a target signal to be randomly adjustable, and is suitable for simulating coexistence environments of various wireless devices. The signal generation can be performed according to the relevant specifications or standards of the required wireless signal, and the real environment signal can be collected and played back.
In one embodiment, the waveform generator 30 is configured to pre-distort the waveform generated from the target waveform file.
In one embodiment, the receiving device 50 is further configured to receive the target signal in the environment and output the target signal to the spectrum analyzer 60. The spectrum analyzer 60 performs analysis to generate a waveform file. The central controller 20 comprises a test module. The test module is used for receiving the waveform file and testing the signal quality of the waveform file.
In one embodiment, the central controller 20 further comprises a regulation module. The adjusting module is used for being connected with the testing module. The adjusting module is used for adjusting one or more physical layer parameters in coding, modulation, frequency domain or time domain in the target original waveform file according to the test result of the testing module.
Compared with the prior art, the wireless signal generating device 10 in the application can not only collect real signals in the environment as original signals, but also obtain files of relevant ideal signals stored in a medium, so that the application range of the wireless signal generating device 10 is widened.
When the real signal cannot be obtained in a closed experimental environment, the wireless signal generating device 10 can still generate a target signal by obtaining a plurality of waveform files of ideal signals, so as to simulate various complex wireless signal environments.
The wireless signal generating device 10 can improve the adjustability of the target signal and widen the test range of the wireless device by editing the waveform file of the target signal.
The receiving device 50 and the spectrum analyzer 60 in the wireless signal generating device 10 can be used not only as a device for acquiring an original signal, but also as a device for acquiring a target signal.
The receiving device 50, the spectrum analyzer 60 and the central controller 20 in the wireless signal generating device 10 form a feedback mechanism, which facilitates real-time monitoring of the quality of the target signal. The central controller 20 adjusts the waveform file of the target signal according to the detection result so as to meet the test requirement of the wireless device.
Wherein the adjusting of the waveform file comprises editing one or more of the encoding mode, the modulation mode, the frequency domain or the time domain. Editing the time domain includes adjustments to acquisition rate and duration. The editing of the frequency domain includes an adjustment of the frequency and an adjustment of the bandwidth.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described examples merely represent several embodiments of the present application and are not to be construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A method for generating a wireless signal, comprising:
acquiring a waveform file of an original signal;
editing one or more physical layer parameters in coding, modulation, frequency domain or time domain in an original waveform file of the original signal to generate a target waveform file;
and generating a target signal according to the target waveform file.
2. The method according to claim 1, wherein the original signals are plural, the plural original signals correspond to the plural original waveform files one by one, and one or more physical layer parameters in coding, modulation, frequency domain or time domain in the plural original waveform files are edited to generate the target waveform file.
3. The wireless signal generation method of claim 2, wherein editing the time domain of the original signal waveform file comprises: and editing the sampling rate and the duration time in the original signal waveform file.
4. The wireless signal generation method of claim 3, wherein the sampling rate in a plurality of the original signal waveform files is the same and the duration in a plurality of the original signal waveform files is the same.
5. The wireless signal generation method of claim 3, wherein the editing the original signal waveform file in the frequency domain comprises: the original signal waveform files contain a plurality of frequencies of the original signals corresponding one to one, and the frequencies are different from each other pairwise.
6. The wireless signal generation method of claim 1, wherein generating a target signal from the target waveform file comprises:
generating an intermediate frequency signal according to the target waveform file, wherein the intermediate frequency signal is an IQ signal;
and generating the target signal according to the intermediate frequency signal, wherein the target signal is a radio frequency signal.
7. The method of claim 1, wherein the step of obtaining the waveform file of the original signal comprises collecting real signals in an environment and analyzing the real signals to obtain the waveform file of the original signal.
8. The method of generating a wireless signal according to claim 1, wherein the method of obtaining a waveform file of an original signal comprises obtaining a waveform file of an ideal signal.
9. The wireless signal generation method of claim 1, further comprising:
and testing the accuracy of the target signal, and if the accuracy is greater than a set value, adjusting one or more physical layer parameters in the coding, modulation, frequency domain or time domain of the target signal.
10. A wireless signal generating device, comprising:
the central controller (20) is used for acquiring a waveform file of an original signal, editing the waveform file of the original signal and generating a target waveform file;
the waveform generator (30) is connected with the central controller (20), and the waveform generator (30) is used for receiving the target waveform file and generating an intermediate frequency signal according to the target waveform file, wherein the intermediate frequency signal is an IQ signal;
and the vector signal generator (40) is connected with the waveform generator (30), and the waveform generator (30) is used for receiving the intermediate frequency signals and generating target signals according to the intermediate frequency signals.
11. The wireless signal generating apparatus of claim 10, further comprising:
the device comprises a receiving device (50) and a spectrum analyzer (60), wherein the receiving device (50) is connected with the spectrum analyzer (60), the spectrum analyzer (60) is connected with the central controller (20), the receiving device (50) is used for collecting real signals in the environment, and the spectrum analyzer (60) is used for analyzing the real signals to obtain a waveform file of the original signals.
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