CN109633236B - Radio signal identification method and device - Google Patents
Radio signal identification method and device Download PDFInfo
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- CN109633236B CN109633236B CN201811524608.9A CN201811524608A CN109633236B CN 109633236 B CN109633236 B CN 109633236B CN 201811524608 A CN201811524608 A CN 201811524608A CN 109633236 B CN109633236 B CN 109633236B
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Abstract
The invention provides a method and a device for identifying edges of radio signals, and relates to the technical field of signal processing. According to the method and the device for identifying the edge of the radio signal, provided by the embodiment of the application, the radio signal and the two reference signals can be respectively compared by setting the two reference signals, and the time interval between the edge of the radio signal and the edge of the non-reference signal can be respectively obtained. Thus, whether the radio signal is a valid signal is determined by the magnitude of the difference of the time intervals. By setting two paths of reference signals, the radio signal which is difficult to stably obtain for a long time can be quickly detected, the identification error which possibly occurs when one reference signal is set is avoided, and the identification efficiency and accuracy of the radio signal edge are improved.
Description
Technical Field
The invention relates to the technical field of signal processing, in particular to a radio signal identification method and a radio signal identification device.
Background
Radio refers to electromagnetic waves that propagate in all free spaces, including air and vacuum. Radio has a very wide application in the field of communications, and in some usage scenarios, a radio signal has a rising edge or a falling edge, and it is very important to identify the edge of the radio signal in some scenarios. An oscilloscope or other programming component can be used to identify the edges of a radio signal, but the use of an oscilloscope or programming component typically only performs qualitative edge checking, which is difficult to identify below high speed radio signals.
Disclosure of Invention
In view of the above, the present invention provides a radio signal identification method and apparatus.
The technical scheme provided by the invention is as follows:
a method of identifying edges of a radio signal, comprising:
comparing the voltage of a radio signal of a preset frequency band with the voltage of a first reference signal to obtain a first time interval value of the radio signal of the preset frequency band and the first reference signal;
comparing the voltages of the radio signal of the preset frequency band and a second reference signal to obtain a second time interval value of the radio signal of the preset frequency band and the second reference signal;
comparing whether the time difference value of the first time interval value and the second time interval value is within a preset interval or not;
and if the time difference value of the first time interval value and the second time interval value is within a preset interval, determining the radio signal as an effective signal.
Further, the method comprises:
and if the time difference value of the first time interval value and the second time interval value is not within a preset interval, determining that the radio signal is an invalid signal.
Further, the radio signal of the preset frequency band is obtained by amplifying the obtained radio signal and filtering out signals outside the preset frequency band in the amplified radio signal.
Further, the method further comprises:
calculating an average of the first time interval and the second time interval;
if the average value is within a preset range, determining the radio signal as a valid signal;
and if the average value is out of the preset range, determining that the radio signal is an invalid signal.
The invention also provides a device for identifying the edge of a radio signal, which comprises: the signal amplification module is respectively connected with the input end of the first comparator and the input end of the second comparator, the reference signal input end of the first comparator is connected with the first reference source, the reference signal input end of the second comparator is connected with the second reference source, and the processing chip is connected with the output end of the first comparator and the output end of the second comparator, wherein:
the first comparator is used for comparing the voltage of the radio signal of the preset frequency band with the voltage of the first reference signal to obtain a first time interval value of the radio signal of the preset frequency band and the first reference signal;
the second comparator is used for comparing the voltage of the radio signal of the preset frequency band with the voltage of a second reference signal to obtain a second time interval value of the radio signal of the preset frequency band and the second reference signal;
the processing chip is used for comparing whether the time difference value of the first time interval value and the second time interval value is within a preset interval or not;
and if the time difference value of the first time interval value and the second time interval value is within a preset interval, determining the radio signal as an effective signal.
Further, the device also comprises a signal amplification module, wherein the signal amplification module is respectively connected with the input end of the first comparator and the input end of the second comparator and is used for amplifying the obtained radio signals.
Furthermore, the device also comprises a filtering module, wherein the filtering module is used for filtering out signals outside the preset frequency band in the amplified radio signals to obtain the radio signals of the preset frequency band.
Further, the processing chip is further configured to determine that the radio signal is an invalid signal if a time difference between the first time interval value and the second time interval value is not within a preset interval.
Furthermore, the identification device further comprises a first timing unit and a second timing unit, wherein the first timing unit and the second timing unit are connected with the processing chip and are used for timing the first time interval value and the second time interval value.
Further, the processing chip is further configured to:
calculating an average of the first time interval and the second time interval;
if the average value is within a preset range, determining the radio signal as a valid signal;
and if the average value is out of the preset range, determining that the radio signal is an invalid signal.
According to the method and the device for identifying the edge of the radio signal, provided by the embodiment of the application, the radio signal and the two reference signals can be respectively compared by setting the two reference signals, and the time interval between the edge of the radio signal and the edge of the non-reference signal can be respectively obtained. Thus, whether the radio signal is a valid signal is determined by the magnitude of the difference of the time intervals. By setting two paths of reference signals, the radio signal which is difficult to stably obtain for a long time can be quickly detected, the identification error which possibly occurs when one reference signal is set is avoided, and the identification efficiency and accuracy of the radio signal edge are improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart illustrating a method for identifying an edge of a radio signal according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an apparatus for identifying an edge of a radio signal according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an apparatus for identifying an edge of a radio signal according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an apparatus for identifying an edge of a radio signal according to an embodiment of the present invention.
Icon: 10-identification means of radio signals; 101-a signal amplification module; 102-a first comparator; 103-a second comparator; 104-a first reference source; 105-a second reference source; 106-processing chip; 107-a filtering module; 108-a first timing unit; 109-second timing unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The embodiment of the application provides a method for identifying an edge of a radio signal, as shown in fig. 1, which includes the following steps.
Step S101, comparing the voltages of the radio signal of the preset frequency band and the first reference signal to obtain a first time interval value of the radio signal of the preset frequency band and the first reference signal.
In the field of wireless signal application, the edge of a radio signal is often required to be detected, and since the radio signal may not repeatedly appear, in order to detect the edge of the radio signal at the first time when the radio signal appears, two parallel lines are designed in the embodiment of the present application to detect the time interval value between the radio signal and a reference signal. It is understood that the radio signal in the embodiment of the present application may be received through a preset antenna. In order to more accurately analyze the received radio signal, the received radio signal may be filtered and amplified, signals outside the preset frequency band may be filtered, signals within the preset frequency band may be amplified, and the filtered and amplified signals may be compared with a reference signal.
Step S102, comparing the voltages of the radio signal of the preset frequency band and the second reference signal to obtain a second time interval value of the radio signal of the preset frequency band and the second reference signal.
The filtered and amplified radio signal can be compared with two reference signals at the same time, the first reference signal and the second reference signal can be generated by different reference signal sources, and the first reference signal and the second reference signal can be voltage signals with different values. The comparison of the radio signal and the reference signal can be realized by a high-speed comparator, and the high-speed comparator can select a comparator with wider bandwidth, so that the pulse signal with narrower bandwidth can be compared. In the embodiment of the application, two high-speed comparators can be arranged, the signal input end of each high-speed comparator can input a filtered and amplified radio signal, and the reference signal input end of each high-speed comparator is connected with a reference signal source. By comparing the radio signal with the reference signal by two high-speed comparators, the time interval between the edge of the radio signal and the edge of the reference signal can be calculated. The first time interval value is the length of time between the edge of the radio signal and the edge of the first reference signal, and the second time interval value is the length of time between the edge of the radio signal and the edge of the second reference signal.
Step S103, comparing whether the time difference value of the first time interval value and the second time interval value is within a preset interval.
After the first time interval value and the second time interval value are calculated by the two high-speed comparators, the magnitude relationship between the difference between the two time interval values and the preset interval can be compared in order to determine whether the radio signal is a valid signal.
Step S104, if the time difference between the first time interval value and the second time interval value is within a preset interval, determining that the radio signal is an effective signal.
When the time difference value between the first time interval value and the second time interval value is within the preset interval, the time interval between the edge of the radio signal and the edges of the two reference signals is short, and the radio signal can be used as a valid signal.
If the time difference between the first time interval value and the second time interval value is not within the preset interval, which indicates that the time interval between the edge of the radio signal and the edge of the two reference signals or one of the two reference signals is larger, then the radio signal may be determined to be an invalid signal.
Furthermore, it is also possible to determine whether the radio signal is a valid signal by calculating an average of the first time interval and the second time interval; if the average value is within a preset range, determining the radio signal as a valid signal; and if the average value is out of the preset range, determining that the radio signal is an invalid signal. The determination of whether the radio signal is a valid signal may be determined by selecting one of the above two methods, and the determination of whether the radio signal is valid may be made by comparing an average value of two time interval values with a preset range.
As shown in fig. 2, the embodiment of the present application further provides an apparatus 10 for identifying an edge of a radio signal, including: the signal amplification module 10 is respectively connected with an input end of the first comparator 102 and an input end of the second comparator 103, a reference signal input end of the first comparator 102 is connected with the first reference source 104, a reference signal input end of the second comparator 103 is connected with the second reference source 105, and the processing chip 106 is connected with an output end of the first comparator 102 and an output end of the second comparator 103.
The first comparator 102 is configured to compare voltages of the radio signal in the preset frequency band and the first reference signal, so as to obtain a first time interval value between the radio signal in the preset frequency band and the first reference signal.
The second comparator 103 is configured to compare voltages of the radio signal in the preset frequency band and the second reference signal, so as to obtain a second time interval value between the radio signal in the preset frequency band and the second reference signal.
The processing chip 106 is configured to compare whether a time difference between the first time interval value and the second time interval value is within a preset interval. And if the time difference value of the first time interval value and the second time interval value is within a preset interval, determining the radio signal as an effective signal.
As shown in fig. 3, the apparatus further includes a signal amplification module 10, where the signal amplification module 10 is respectively connected to an input terminal of the first comparator 102 and an input terminal of the second comparator 103, and is configured to amplify the obtained radio signal.
As shown in fig. 4, the apparatus further includes a filtering module 107, where the filtering module 107 is configured to filter out signals outside a preset frequency band in the amplified radio signal, so as to obtain the radio signal in the preset frequency band.
The processing chip 106 is further configured to determine that the radio signal is an invalid signal if the time difference between the first time interval value and the second time interval value is not within a preset interval.
The identification device further comprises a first timing unit 108 and a second timing unit 109, wherein the first timing unit 108 and the second timing unit 109 are connected to the processing chip 106 and are configured to time the first time interval value and the second time interval value.
In summary, the method and the device for identifying the edge of the radio signal provided in the embodiment of the present application can compare the radio signal with two reference signals respectively by setting the two reference signals, and obtain the time interval between the edge of the radio signal and the edge of the no reference signal respectively. Thus, whether the radio signal is a valid signal is determined by the magnitude of the difference of the time intervals. By setting two paths of reference signals, the radio signal which is difficult to stably obtain for a long time can be quickly detected, the identification error which possibly occurs when one reference signal is set is avoided, and the identification efficiency and accuracy of the radio signal edge are improved.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for identifying edges of a radio signal, comprising:
comparing the voltage of a radio signal of a preset frequency band with the voltage of a first reference signal to obtain a first time interval value of the edge of the radio signal of the preset frequency band and the edge of the first reference signal;
comparing the voltage of the radio signal of the preset frequency band with the voltage of a second reference signal to obtain a second time interval value of the edge of the radio signal of the preset frequency band and the edge of the second reference signal;
comparing whether the time difference value of the first time interval value and the second time interval value is within a preset interval or not;
and if the time difference value of the first time interval value and the second time interval value is within a preset interval, determining the radio signal as an effective signal.
2. A method of identifying edges of a radio signal as claimed in claim 1, characterized in that the method comprises:
and if the time difference value of the first time interval value and the second time interval value is not within a preset interval, determining that the radio signal is an invalid signal.
3. The method according to claim 1, wherein the radio signal of the predetermined frequency band is obtained by amplifying the obtained radio signal and filtering out signals outside the predetermined frequency band in the amplified radio signal.
4. A method of identifying an edge of a radio signal as claimed in claim 1, characterized in that the method further comprises:
calculating an average of the first time interval and the second time interval;
if the average value is within a preset range, determining the radio signal as a valid signal;
and if the average value is out of the preset range, determining that the radio signal is an invalid signal.
5. An apparatus for identifying an edge of a radio signal, comprising: the signal amplification module is respectively connected with the input end of the first comparator and the input end of the second comparator, the reference signal input end of the first comparator is connected with the first reference source, the reference signal input end of the second comparator is connected with the second reference source, and the processing chip is connected with the output end of the first comparator and the output end of the second comparator, wherein:
the first comparator is used for comparing the voltage of the radio signal of the preset frequency band with the voltage of the first reference signal to obtain a first time interval value between the edge of the radio signal of the preset frequency band and the edge of the first reference signal;
the second comparator is used for comparing the voltage of the radio signal of the preset frequency band with the voltage of the second reference signal to obtain a second time interval value of the edge of the radio signal of the preset frequency band and the edge of the second reference signal;
the processing chip is used for comparing whether the time difference value of the first time interval value and the second time interval value is within a preset interval or not;
and if the time difference value of the first time interval value and the second time interval value is within a preset interval, determining the radio signal as an effective signal.
6. The apparatus for identifying edges of radio signals according to claim 5, further comprising a signal amplification module, said signal amplification module being respectively connected to the input terminal of said first comparator and the input terminal of said second comparator for amplifying the obtained radio signals.
7. The apparatus according to claim 5, further comprising a filtering module, wherein the filtering module is configured to filter out signals outside a preset frequency band in the amplified radio signal, so as to obtain the radio signal in the preset frequency band.
8. The apparatus as claimed in claim 6, wherein the processing chip is further configured to determine that the radio signal is an invalid signal if a time difference between the first time interval value and the second time interval value is not within a predetermined interval.
9. The apparatus according to claim 6, further comprising a first timing unit and a second timing unit, the first timing unit and the second timing unit being connected to the processing chip for timing the first time interval value and the second time interval value.
10. The apparatus for identifying an edge of a radio signal as claimed in claim 6, wherein the processing chip is further configured to:
calculating an average of the first time interval and the second time interval;
if the average value is within a preset range, determining the radio signal as a valid signal;
and if the average value is out of the preset range, determining that the radio signal is an invalid signal.
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| CN201811524608.9A CN109633236B (en) | 2018-12-13 | 2018-12-13 | Radio signal identification method and device |
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| CN110572170B (en) * | 2019-09-10 | 2021-06-22 | 成都精位科技有限公司 | Signal receiving device and wireless transmitting device screening method |
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