CN114039627A - Frequency hopping synchronization method and electronic equipment - Google Patents
Frequency hopping synchronization method and electronic equipment Download PDFInfo
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- CN114039627A CN114039627A CN202111143190.9A CN202111143190A CN114039627A CN 114039627 A CN114039627 A CN 114039627A CN 202111143190 A CN202111143190 A CN 202111143190A CN 114039627 A CN114039627 A CN 114039627A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
- H04B2001/7152—Interference-related aspects with means for suppressing interference
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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 application discloses a frequency hopping synchronization method and electronic equipment, wherein the method comprises the following steps: calculating time information TOD according to local clock information acquired in real time, estimating transmission delay and time error between the two synchronous parties, and calculating a frequency hopping pattern according to the TOD, the transmission delay and the time error; determining power intensity information corresponding to each preset frequency point of at least one preset frequency point in a frequency hopping pattern according to the received first signal, and determining a first curve of the power corresponding to the first signal changing along with time according to the power intensity information; calculating a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, and judging whether the two synchronous parties are synchronous according to the synchronization correlation value, wherein the synchronization correlation value refers to the synchronization degree between the two synchronous parties of each preset frequency point; if not, the hopping pattern is calculated again until the two synchronous parties are synchronous. The method and the device solve the technical problem that tracking type interference cannot be well dealt with in the prior art.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a frequency hopping synchronization method and an electronic device.
Background
In the frequency hopping communication technology, carrier frequencies of signals (frequency hopping signals) hop according to a predetermined pattern within an available bandwidth over time, and the frequency hopping signals occupy one or more available carrier frequencies within one hop of time, so that the frequency hopping signals are modulated and then shifted in frequency, and the carrier frequency range is much larger than the signal bandwidth, so as to realize spectrum spreading. Compared with a general communication system, frequency hopping communication has good anti-interference and anti-interception capabilities, and the anti-interference performance mainly depends on carrier bandwidth and hopping speed, so that the realization of frequency hopping synchronization is a key technology of frequency hopping communication in a rapid frequency hopping system.
At present, the main synchronization means in the existing frequency hopping communication is a Time of Day (TOD) synchronization method, wherein during the frequency hopping communication process, both communication parties calculate local TOD information according to the local clock or the Time service of a navigation satellite, a transmitting end modulates the TOD information corresponding to the transmitting end as data in a frequency hopping signal, the frequency of the frequency hopping signal is mapped to several frequency points according to the TOD information, some of the frequency points are changed at intervals, a receiving end realizes frequency hopping according to the received TOD information, that is, slow frequency hopping is adopted to realize synchronization. By the method, the receiving end can completely receive the TOD information sent by the transmitting end as long as the local TOD information can map out a correct frequency point, and frequency hopping synchronization is easy to realize. However, since synchronization is achieved by slow frequency hopping, the frequency point replacement frequency of a frequency hopping signal is low, and the frequency point replacement is easily affected by tracking interference, and thus tracking interference cannot be dealt with well.
Disclosure of Invention
The technical problem that this application was solved is: aiming at the problem that the tracking interference cannot be well dealt with in the prior art, the application provides a frequency hopping synchronization method and electronic equipment, and in the scheme provided by the embodiment of the application, determining whether the two synchronous parties are synchronous by calculating a curve of the power change along with time corresponding to the frequency hopping pattern and a curve of the power change along with time corresponding to the actually received first signal, calculating the frequency hopping pattern again when the two synchronous parties are not synchronous until the two synchronous parties are synchronous, the scheme provided by the embodiment of the application is suitable for frequency hopping synchronization of a fast hopping frequency hopping transmission system, fast hopping frequency hopping communication can effectively resist tracking forwarding type interference, and compared with the existing TOD frequency hopping synchronization scheme for changing partial synchronous carrier frequency points at intervals, the scheme provided by the embodiment of the application has the advantages that the hopping speed of the used frequency hopping synchronous carrier is higher, and the anti-interference and anti-interception performances can be enhanced.
In a first aspect, an embodiment of the present application provides a method for frequency hopping synchronization, where the method includes:
calculating time information TOD according to local clock information acquired in real time, estimating transmission delay and time error between the two synchronous parties, and calculating a frequency hopping pattern according to the TOD, the transmission delay and the time error;
determining power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern according to the received first signal, and determining a first curve of the power corresponding to the first signal changing along with time according to the power intensity information;
calculating a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, and judging whether the two synchronous parties are synchronous according to the synchronization correlation value, wherein the synchronization correlation value refers to the synchronization degree between the two synchronous parties at each preset frequency point;
if not, adjusting the transmission delay and the time error, and reckoning the frequency hopping pattern until the two synchronous parties are synchronous.
In the scheme provided by the embodiment of the application, whether two synchronous parties are synchronous or not is determined by calculating the curve of the power, which changes along with time, corresponding to the frequency hopping pattern and the curve of the power, which changes along with time, corresponding to the actually received first signal, and the frequency hopping pattern is calculated again when the two synchronous parties are not synchronous until synchronization, namely, the scheme provided by the embodiment of the application is suitable for frequency hopping synchronization of a fast hopping frequency hopping transmission system, fast hopping frequency hopping communication can effectively resist tracking and forwarding type interference, and compared with the existing TOD frequency hopping synchronization scheme for changing partial synchronous carrier frequency points at intervals, the scheme provided by the embodiment of the application has the advantages that the hopping speed of the frequency hopping synchronous carrier used by the scheme is higher, and the anti-interference and anti-interception performances can be enhanced.
Optionally, estimating the transmission delay and the time error between the two synchronized parties comprises:
determining the distance between the two synchronous parties, and determining the transmission delay according to the distance and a preset signal transmission speed;
and determining respective current local clock information of the two synchronous parties, and calculating the difference between the respective current local clock information corresponding to the two synchronous parties to obtain the time error.
Optionally, determining, according to the received first signal, power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern, includes:
determining frequency information of each preset frequency point, performing down-conversion processing on the first signal to obtain a second signal, and performing filtering processing on the second signal according to the frequency information to obtain a third signal corresponding to each preset frequency point;
and calculating to obtain the power intensity information corresponding to each preset frequency point according to the third signal.
Optionally, calculating a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, including:
calculating a second curve of the power changing along with time in the frequency hopping synchronization process according to the synchronous frequency hopping pattern;
determining a time point corresponding to each preset frequency point, determining a first power intensity of the time point corresponding to each preset frequency point on the first curve, and determining a second power intensity of the time point corresponding to each preset frequency point on the second curve;
and respectively comparing the first power intensity and the second power intensity corresponding to each preset frequency point to obtain the synchronous correlation value.
Optionally, comparing the first power strength and the second power strength corresponding to each preset frequency point respectively to obtain the synchronous correlation value, including:
respectively subtracting the first power intensity and the second power intensity corresponding to each preset frequency point to obtain a difference value;
judging whether the difference value corresponding to each preset frequency point is larger than a first preset threshold value or not;
if the value is larger than the first preset threshold value, the synchronous correlation value is 0;
otherwise, the synchronization correlation value is 1.
Optionally, the determining whether the two synchronization parties are synchronized according to the synchronization correlation value includes:
judging whether the preset frequency point with the synchronous correlation value smaller than a second preset threshold value exists in the at least one preset frequency point or not;
if not, the two synchronous parties are synchronous; otherwise, the two synchronous parties are not synchronous.
Optionally, after the two synchronization parties synchronize, the method further includes:
synchronously verifying the two synchronous parties at intervals of a preset time period according to the frequency hopping pattern and a fourth signal received in real time to obtain a verification result;
if the verification result shows that the two synchronous parties are not synchronous, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
Optionally, after the two synchronization parties synchronize, the method further includes:
determining a transmission error rate corresponding to the fourth signal according to the fourth signal;
judging whether the transmission error rate is greater than a third preset threshold value or not;
if the difference is larger than the preset threshold, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
In a second aspect, the present application provides an electronic device, comprising:
a memory for storing instructions for execution by at least one processor;
a processor for executing instructions stored in a memory to perform the method of the first aspect.
In a third aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect.
Drawings
Fig. 1 is a schematic flowchart of a method for frequency hopping synchronization according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a frequency hopping tracking process according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The method for frequency hopping synchronization provided by the embodiments of the present application is described in further detail below with reference to the drawings in the specification, and a specific implementation manner of the method may include the following steps (a flow of the method is shown in fig. 1):
step 101, the receiving end calculates time information TOD according to the local clock information acquired in real time, estimates transmission delay and time error between the two synchronous parties, and calculates a frequency hopping pattern according to the TOD, the transmission delay and the time error.
Specifically, in the solution provided in the embodiment of the present application, the TOD includes frequency hopping pattern real-time status information or real-time clock information, where the real-time clock information includes year, month, time of day, minute, second, millisecond, and the like; the state information includes the code sequence state in real time by the pseudo-code generator. Based on these information, the receiving end can know the frequency of the current hopping dwell and the frequency of the next hopping dwell, so as to synchronize the two synchronization parties (the receiving end and the transmitting end). By way of example, TOD may be mapped from local clock information.
Furthermore, in the data transmission process, transmission delay and time error inevitably exist between the two synchronous parties, and in order to avoid the influence of the transmission delay and the time error on frequency hopping synchronization, the transmission delay and the time error need to be considered in the process of calculating the frequency hopping pattern, and the frequency hopping pattern on the premise is calculated by adding the estimated transmission delay and the estimated time error.
In one possible implementation manner, estimating the transmission delay and the time error between the two synchronous parties includes: determining the distance between the two synchronous parties, and determining the transmission delay according to the distance and a preset signal transmission speed; and determining respective current local clock information of the two synchronous parties, and calculating the difference between the respective current local clock information corresponding to the two synchronous parties to obtain the time error.
In the scheme provided in the embodiment of the present application, in frequency hopping communication, a currently transmitted frequency hopping point is determined by TOD information, and the TOD information is mapped by clock information. Because both transmission sides may have clock errors and transmission has time delay due to transmission distance, the difference exists in dual-transmission TOD information, so that the receiving end estimates the TOD difference caused by these factors when performing frequency hopping synchronization acquisition, and then determines the frequency hopping pattern corresponding to the frequency hopping synchronization according to the current local TOD information.
Step 102, a receiving end determines power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern according to a received first signal, and determines a first curve of power variation along with time corresponding to the first signal according to the power intensity information.
In the scheme provided by the embodiment of the application, at least one preset frequency point is set on the frequency hopping pattern, and the at least one preset frequency point is used for verifying whether the sending end and the receiving end are synchronous or not in the follow-up process. For example, in the frequency hopping synchronization process, the number of preset frequency points may be set according to actual requirements, which is not limited herein.
Specifically, in the communication process between the receiving end and the sending end, the sending end sends a first signal (i.e., a frequency hopping signal) to the receiving end, and after receiving the first signal, the receiving end determines, according to the received first signal, power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern.
In a possible implementation manner, determining, according to a received first signal, power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern includes: determining frequency information of each preset frequency point, performing down-conversion processing on the first signal to obtain a second signal, and performing filtering processing on the second signal according to the frequency information to obtain a third signal corresponding to each preset frequency point; and calculating to obtain the power intensity information corresponding to each preset frequency point according to the third signal.
In the scheme provided by the embodiment of the application, the first signal is received and down-converted, and the parameters of the band-pass filter are set according to at least one preset frequency point selected from the frequency hopping pattern, so as to respectively filter the preset frequency points. After filtering, the signal is rectified, a first curve of the filtered power changing along with time can be obtained, when the frequency point corresponding to the filter has the signal, the power is relatively large, and when the signal does not exist, the power is small, so that the time at which the signal of the current frequency point is received can be determined according to the curve. Through the preliminary simulation to the scheme, predetermine the frequency more, the synchronization performance is better, but the frequency point increases and can lead to the calculated amount increase, consequently will rationally set up according to actual conditions and predetermine frequency number.
Step 103, the receiving end calculates a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, and determines whether the two synchronous parties are synchronous according to the synchronization correlation value, wherein the synchronization correlation value refers to a synchronization degree between the two synchronous parties at each preset frequency point.
Specifically, in the scheme provided in the embodiment of the present application, after calculating a first curve of the power change with time corresponding to the received first signal, the receiving end compares the obtained first rate curve with the frequency hopping pattern to determine the time of the synchronization acquisition. And drawing a second curve of which the power changes along with time according to the moment when at least one preset frequency point in the frequency hopping pattern appears, comparing the second curve with the first curve, and considering that the synchronization is successful when the correlation value calculated at the moment corresponding to each preset frequency point exceeds a certain threshold value. For example, in the solution provided in the embodiment of the present application, the setting of the determination threshold needs to be estimated according to a white noise level of an actual transmission environment.
In a possible implementation manner, calculating a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern includes: calculating a second curve of the power changing along with time in the frequency hopping synchronization process according to the synchronous frequency hopping pattern; determining a time point corresponding to each preset frequency point, determining a first power intensity of the time point corresponding to each preset frequency point on the first curve, and determining a second power intensity of the time point corresponding to each preset frequency point on the second curve; and respectively comparing the first power intensity and the second power intensity corresponding to each preset frequency point to obtain the synchronous correlation value.
Further, in a possible implementation manner, comparing the first power strength and the second power strength corresponding to each preset frequency point respectively to obtain the synchronous correlation value includes: respectively subtracting the first power intensity and the second power intensity corresponding to each preset frequency point to obtain a difference value; judging whether the difference value corresponding to each preset frequency point is larger than a first preset threshold value or not; if the value is larger than the first preset threshold value, the synchronous correlation value is 0; otherwise, the synchronization correlation value is 1.
Further, after the receiving end calculates the synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, it is further required to determine whether the two synchronization parties are synchronized according to the synchronization correlation value. In the solution provided in the embodiment of the present application, there are multiple ways to determine whether both synchronization parties are synchronized according to the synchronization correlation value, and one of them is taken as an example for description below.
In a possible implementation manner, the determining whether the two synchronization parties are synchronized according to the synchronization correlation value includes: judging whether the preset frequency point with the synchronous correlation value smaller than a second preset threshold value exists in the at least one preset frequency point or not; if not, the two synchronous parties are synchronous; otherwise, the two synchronous parties are not synchronous.
And step 104, if the synchronization is not synchronous, the receiving end adjusts the transmission delay and the time error and reckons the frequency hopping pattern until the synchronization parties are synchronous.
Specifically, in the scheme provided in this embodiment of the present application, if the two synchronization parties are not synchronized, the receiving end adjusts the transmission delay and the time error, re-calculates the frequency hopping pattern according to the TOD, the adjusted transmission test, and the time error, and compares the re-calculated frequency hopping pattern with a time variation curve of the power corresponding to the received first signal until the two synchronization parties are synchronized.
Further, in the solution provided in the embodiment of the present application, after step 103, if the two synchronization parties are synchronized, the process is ended.
Further, in a solution provided in an embodiment of the present application, in a possible implementation manner, after the synchronizing of the two synchronization parties, the method further includes: synchronously verifying the two synchronous parties at intervals of a preset time period according to the frequency hopping pattern and a fourth signal received in real time to obtain a verification result; if the verification result shows that the two synchronous parties are not synchronous, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
In a possible implementation manner, after the synchronization between the two synchronization parties, the method further includes: determining a transmission error rate corresponding to the fourth signal according to the fourth signal; judging whether the transmission error rate is greater than a third preset threshold value or not; if the difference is larger than the preset threshold, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
Specifically, in the scheme provided in the embodiment of the present application, after the acquisition is successful (synchronization is successful), the frequency hopping tracking stage is performed to perform the debounce and demodulation on the transmission information. And at intervals, performing capture (synchronous) verification on the currently received signals according to frequency hopping patterns of some frequency points corresponding to the current TOD value, or re-capturing when the error rate exceeds a certain value according to the transmission error rate. The specific process is shown in fig. 2.
In the scheme provided by the embodiment of the application, whether two synchronous parties are synchronous or not is determined by calculating the curve of the power, which changes along with time, corresponding to the frequency hopping pattern and the curve of the power, which changes along with time, corresponding to the actually received first signal, and the frequency hopping pattern is calculated again when the two synchronous parties are not synchronous until synchronization, namely, the scheme provided by the embodiment of the application is suitable for frequency hopping synchronization of a fast hopping frequency hopping transmission system, fast hopping frequency hopping communication can effectively resist tracking and forwarding type interference, and compared with the existing TOD frequency hopping synchronization scheme for changing partial synchronous carrier frequency points at intervals, the scheme provided by the embodiment of the application has the advantages that the hopping speed of the frequency hopping synchronous carrier used by the scheme is higher, and the anti-interference and anti-interception performances can be enhanced.
Referring to fig. 3, the present application provides an electronic device, comprising:
a memory 301 for storing instructions for execution by at least one processor;
a processor 302 for executing instructions stored in memory to perform the method described in fig. 1.
A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of fig. 1.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of frequency hopping synchronization, comprising:
calculating time information TOD according to local clock information acquired in real time, estimating transmission delay and time error between the two synchronous parties, and calculating a frequency hopping pattern according to the TOD, the transmission delay and the time error;
determining power intensity information corresponding to each preset frequency point of at least one preset frequency point in the frequency hopping pattern according to the received first signal, and determining a first curve of the power corresponding to the first signal changing along with time according to the power intensity information;
calculating a synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern, and judging whether the two synchronous parties are synchronous according to the synchronization correlation value, wherein the synchronization correlation value refers to the synchronization degree between the two synchronous parties at each preset frequency point;
if not, adjusting the transmission delay and the time error, and reckoning the frequency hopping pattern until the two synchronous parties are synchronous.
2. The method of claim 1, wherein estimating the propagation delay and time error between the synchronized parties comprises:
determining the distance between the two synchronous parties, and determining the transmission delay according to the distance and a preset signal transmission speed;
and determining respective current local clock information of the two synchronous parties, and calculating the difference between the respective current local clock information corresponding to the two synchronous parties to obtain the time error.
3. The method of claim 2, wherein determining the power strength information corresponding to each of at least one preset frequency point in the frequency hopping pattern according to the received first signal comprises:
determining frequency information of each preset frequency point, performing down-conversion processing on the first signal to obtain a second signal, and performing filtering processing on the second signal according to the frequency information to obtain a third signal corresponding to each preset frequency point;
and calculating to obtain the power intensity information corresponding to each preset frequency point according to the third signal.
4. The method according to any one of claims 1 to 3, wherein calculating the synchronization correlation value of each preset frequency point according to the first curve and the frequency hopping pattern comprises:
calculating a second curve of the power changing along with time in the frequency hopping synchronization process according to the synchronous frequency hopping pattern;
determining a time point corresponding to each preset frequency point, determining a first power intensity of the time point corresponding to each preset frequency point on the first curve, and determining a second power intensity of the time point corresponding to each preset frequency point on the second curve;
and respectively comparing the first power intensity and the second power intensity corresponding to each preset frequency point to obtain the synchronous correlation value.
5. The method according to claim 4, wherein comparing the first power strength and the second power strength corresponding to each of the preset frequency points to obtain the synchronous correlation value respectively comprises:
respectively subtracting the first power intensity and the second power intensity corresponding to each preset frequency point to obtain a difference value;
judging whether the difference value corresponding to each preset frequency point is larger than a first preset threshold value or not;
if the value is larger than the first preset threshold value, the synchronous correlation value is 0;
otherwise, the synchronization correlation value is 1.
6. The method of claim 5, wherein determining whether the two synchronized parties are synchronized based on the synchronization correlation value comprises:
judging whether the preset frequency point with the synchronous correlation value smaller than a second preset threshold value exists in the at least one preset frequency point or not;
if not, the two synchronous parties are synchronous; otherwise, the two synchronous parties are not synchronous.
7. The method according to any one of claims 1 to 3, further comprising, after the synchronization of the two parties:
synchronously verifying the two synchronous parties at intervals of a preset time period according to the frequency hopping pattern and a fourth signal received in real time to obtain a verification result;
if the verification result shows that the two synchronous parties are not synchronous, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
8. The method according to any one of claims 1 to 3, further comprising, after the synchronization of the two parties:
determining a transmission error rate corresponding to the fourth signal according to the fourth signal;
judging whether the transmission error rate is greater than a third preset threshold value or not;
if the difference is larger than the preset threshold, the transmission delay and the time error are readjusted, and the frequency hopping pattern is reckoned until the two synchronous parties are synchronous.
9. An electronic device, characterized in that the electronic device comprises:
a memory for storing instructions for execution by at least one processor;
a processor for executing instructions stored in a memory to perform the method of any of claims 1 to 8.
10. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 8.
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| CN104301006A (en) * | 2014-09-26 | 2015-01-21 | 西安空间无线电技术研究所 | Multi-path slow frequency hopping signal anti-interference processing system |
| CN105897304A (en) * | 2016-05-31 | 2016-08-24 | 西安空间无线电技术研究所 | Rapid sync method of frequency hopping communication system |
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