CN108235328B - Automatic spectrum re-sensing method, system, computer readable storage medium and terminal - Google Patents
Automatic spectrum re-sensing method, system, computer readable storage medium and terminal Download PDFInfo
- Publication number
- CN108235328B CN108235328B CN201810013794.3A CN201810013794A CN108235328B CN 108235328 B CN108235328 B CN 108235328B CN 201810013794 A CN201810013794 A CN 201810013794A CN 108235328 B CN108235328 B CN 108235328B
- Authority
- CN
- China
- Prior art keywords
- sensing
- detection
- spectrum
- automatic
- antennas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an automatic frequency spectrum re-sensing method, a system, a computer readable storage medium and a terminal, wherein the automatic frequency spectrum re-sensing method comprises the following steps: step one, a cognitive user detects the transmission condition of a master user by utilizing at least two detection antennas so as to obtain the detection result of the detection antennas or collected detection contents; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal; and step two, the cognitive user carries out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute the spectrum automatic re-sensing. The invention can obviously improve the judgment state distinguishing granularity of frequency spectrum sensing, and obviously improves the sensing precision under the same system parameters compared with the prior sensing technology; the method has the advantages of wide applicable range, suitability for various spectrum sensing technologies, easy implementation, no need of changing the hardware structure of the existing system, and convenience for practical popularization and application.
Description
Technical Field
The invention belongs to the technical field of wireless communication, relates to a sensing method and a sensing system, and particularly relates to an automatic spectrum re-sensing method, an automatic spectrum re-sensing system, a computer-readable storage medium and a terminal.
Background
In recent years, with the development of wireless communication technology and the popularization of intelligent terminals, the demand of mobile users for data communication has greatly increased, which puts tremendous pressure on limited spectrum resources. In order to utilize spectrum resources more effectively, Cognitive Radio (CR) technology has gained much attention in both academic and industrial fields. The CR network is composed of a main user and a cognitive user. The cognitive user can identify the blank frequency band which is not used by the main user currently through a frequency spectrum sensing technology, and the frequency spectrum resources are utilized for temporary data transmission. Therefore, in the CR network, the spectrum sensing accuracy of the cognitive user is a major factor affecting its performance.
The general detection procedure for spectrum sensing is performed as follows: the cognitive user has a default cycle period. The cycle period consists of a shorter sensing period and a longer signal transmission period. In a sensing period, a cognitive user collects signal data on a small section of target frequency band, then carries out frequency spectrum sensing on the signal data, and detects whether a master user is transmitting data. If the master user is not in transmission in the perception judgment, the cognitive user can transmit data in the signal transmission period of the cycle period; otherwise, the signal transmission period of the cycle is left blank.
Currently, there are many techniques available for identifying and detecting primary users. The most prevalent of these are two main categories: energy characterization and detection, and feature characterization and detection. The basic principle of the energy characterization and detection type technology is to use signal energy as a mark that a primary user is transmitting. And giving a specific energy threshold, periodically monitoring the signal energy on the target frequency band by the cognitive user, if the signal energy of the current target frequency band is higher than the given threshold, determining that the master user is transmitting, otherwise, determining that the master user is not transmitting. On the other hand, the basic principle of the feature characterization and detection technology is that a specific feature tag is marked on a master user in advance, a cognitive user periodically monitors signal features on a target frequency band, and if the signal features of the current target frequency band meet requirements, the master user is judged to be transmitting, otherwise, the master user is judged not to be transmitting.
However, in the conventional spectrum sensing technology, due to the limitation of user terminal equipment, a single antenna at a receiving end is used for processing, the decision state discrimination granularity of spectrum sensing is coarse, and the sensing performance is more restricted. With the rapid development of mobile communication technology, it has become normal for a user terminal device to be equipped with a dual antenna and the above configuration.
Therefore, how to provide an automatic spectrum re-sensing method, system, computer-readable storage medium and terminal to solve the problems that the prior art is limited by user terminal equipment, the processing is performed by using a single antenna of a receiving end, the decision state differentiation granularity of spectrum sensing is coarse, the sensing performance is more restricted, and the like, and thus, the method and system become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an automatic spectrum re-sensing method, system, computer-readable storage medium and terminal, which are used to solve the problems in the prior art that the decision granularity of spectrum sensing is coarse and the sensing performance is more restricted by the user terminal device, and the single antenna of the receiving end is used for processing.
To achieve the above and other related objects, an aspect of the present invention provides an automatic spectrum re-sensing method, including: step one, a cognitive user detects the transmission condition of a master user by utilizing at least two detection antennas so as to obtain the detection result of the detection antennas or collected detection contents; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal; and step two, the cognitive user carries out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute the spectrum automatic re-sensing.
In an embodiment of the present invention, the timing for performing the spectrum auto-re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
In an embodiment of the present invention, a detection method for detecting a transmission condition of a primary user by a cognitive user using at least two detection antennas includes: an energy threshold detection mode, a main user signal characteristic detection mode or a main user signal waveform matching detection mode.
In an embodiment of the present invention, the step of making a comprehensive decision by the cognitive user according to the detection result of the detecting antenna to determine whether to perform spectrum automatic re-sensing includes: judging to execute automatic spectrum re-sensing when the sensing result of the sensing antenna which is used by the cognitive user to participate in sensing is that the number of the sensing antennas which are used by the master user to transmit the communication signal currently is greater than or equal to a first preset comprehensive judgment index and is smaller than a second preset comprehensive judgment index; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection.
In an embodiment of the present invention, the step of the cognitive user performing a comprehensive decision according to the detection result of the detecting antenna to determine whether to perform spectrum automatic re-sensing further includes: when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is less than the first preset comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting the spectrum sensing judgment result that the master user currently does not transmit the communication signals; and when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is greater than or equal to the second preset comprehensive judgment index, judging not to execute the spectrum automatic re-sensing, and directly outputting the spectrum sensing judgment result of the master user currently transmitting the communication signals.
In an embodiment of the present invention, the step of the cognitive user performing a comprehensive decision according to the collected detection contents of the detection antennas to determine whether to perform spectrum automatic re-sensing includes determining to perform spectrum automatic re-sensing when the content collected by the detection antennas of the cognitive user participating in detection is weighted and combined to be greater than or equal to a third predetermined comprehensive decision index and smaller than a fourth predetermined comprehensive decision index.
In an embodiment of the present invention, when the content collected by the sensing antennas of the cognitive user participating in the sensing is weighted and combined and then is smaller than the third predetermined comprehensive decision index, it is determined that the spectrum automatic re-sensing is not performed, and the spectrum sensing decision result that the master user is not currently transmitting the communication signal is directly output; and when the content collected by the sensing antennas for the sensing participation of the cognitive users is weighted and combined and is more than or equal to the fourth predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that the master user is currently transmitting the communication signal.
In an embodiment of the present invention, the sensing times of the continuous spectrum automatic re-sensing corresponding to the single conventional sensing includes: limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing; limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times; frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
Another aspect of the present invention provides an automatic spectrum re-sensing system, including: the acquisition module is used for detecting the transmission condition of the master user by utilizing at least two detection antennas so as to acquire the detection result of the detection antennas or the collected detection content; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal; and the processing module is used for the cognitive user to carry out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute the spectrum automatic re-sensing.
In an embodiment of the present invention, the timing for the processing module to perform the spectrum auto-re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
Yet another aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the automatic spectrum re-sensing method.
A final aspect of the present invention provides a terminal, including: at least two detecting antennas, a processor and a memory; the detecting antenna is used for detecting a communication signal from main user transmission; the memory for storing a computer program, the processor for executing the computer program stored by the memory to cause the processor to perform the method of automatic spectrum re-perception according to any of claims 1 to 8
As described above, the method, system, computer-readable storage medium, and terminal for sensing spectrum re-occurrence provided by the present invention perform comprehensive decision based on detection results between multiple antennas by using signal reception independence between multiple antennas of a user terminal device, and perform spectrum re-occurrence sensing if the detection results between the antennas satisfy a certain condition. It has the following effective effects:
firstly, the invention can obviously improve the judgment state distinguishing granularity of frequency spectrum sensing, and obviously improve the sensing precision under the same system parameters compared with the prior sensing technology;
secondly, the invention has wide application range and is suitable for various spectrum sensing technologies, such as energy detection sensing, feature detection sensing and the like.
Thirdly, the invention is easy to implement, does not need to change the hardware structure of the existing system, and is convenient for practical popularization and application.
Drawings
Fig. 1 is a schematic diagram showing an example of a main user structure of the present invention.
FIG. 2 is a flow chart illustrating an automatic spectrum re-sensing method according to the present invention.
Fig. 3 is a schematic diagram showing a cycle of the cognitive user according to the present invention.
Fig. 4 is a schematic structural diagram of an automatic spectrum re-sensing system according to an embodiment of the invention.
Description of the element reference numerals
4 automatic spectrum re-sensing system
41 acquisition module
42 processing module
S21-S22
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example one
The embodiment provides an automatic spectrum re-sensing method, which is applied to cognitive users; the automatic spectrum re-sensing method comprises the following steps:
step one, a cognitive user detects the transmission condition of a master user by utilizing at least two detection antennas so as to obtain the detection result of the detection antennas or collected detection contents; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal;
and step two, the cognitive user carries out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute the spectrum automatic re-sensing.
The automatic spectrum re-sensing method provided by the present embodiment will be described in detail below with reference to the drawings. The automatic spectrum re-sensing method is applied to the cognitive user, and the cognitive user listens to the master user. The master user is used for transmitting communication signals, and the cognitive user is provided with I detecting antennas used for detecting the communication signals.
An example of the primary user structure is shown in fig. 1. The corresponding scenario and basic assumptions are as follows: assuming that a primary user terminal is configured with two antennas, an Orthogonal Frequency Division Multiplexing (OFDM) technique is used to transmit a signal, and a Cyclic Delay Diversity (CDD) technique is used to embed a primary user characteristic Δ in a transmitted OFDM signal stream. Master user sends signal s on first antenna1(n) on the second dayOn-line will s1(n) transmitting after cyclic shift Δ, i.e. transmitting signal s on the second antenna2(n)＝s1(n)e-j2πΔ/NWhere N represents the total number of subcarriers. In the above process, the cyclic shift Δ is the exclusive feature of the primary user.
Please refer to fig. 2, which is a flowchart illustrating an automatic spectrum re-sensing method. As shown in fig. 2, the automatic spectrum re-sensing method includes the following steps:
s21, the cognitive user uses at least two detecting antennas to detect the transmission condition of the primary user, so as to obtain the detecting result of the detecting antennas or the collected detecting content. The detection mode for detecting the transmission condition of the main user by the cognitive user by utilizing at least two detection antennas comprises the following steps: an energy threshold detection mode, a main user signal characteristic detection mode or a main user signal waveform matching detection mode.
And S22, the cognitive user carries out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute spectrum automatic re-sensing.
In this embodiment, the comprehensive decision based on the detection result of the detecting antenna can be made
Specifically, when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signal is greater than or equal to a first preset comprehensive judgment index and is smaller than a second preset comprehensive judgment index, judging to execute the automatic re-sensing of the frequency spectrum; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection.
When the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is less than the first preset comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting the spectrum sensing judgment result that the master user currently does not transmit the communication signals;
and when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is greater than or equal to the second preset comprehensive judgment index, judging not to execute the spectrum automatic re-sensing, and directly outputting the spectrum sensing judgment result of the master user currently transmitting the communication signals.
In this embodiment, a comprehensive decision may be made according to the detection content of the detection antenna.
Specifically, when the content collected by the sensing antennas of the cognitive user participating in the sensing is weighted and combined to be greater than or equal to a third predetermined comprehensive judgment index and smaller than a fourth predetermined comprehensive judgment index, the automatic re-sensing of the frequency spectrum is judged to be executed.
When the content collected by the sensing antennas of the cognitive users participating in the sensing is weighted and combined and then is smaller than the third predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that a master user does not transmit communication signals currently;
and when the content collected by the sensing antennas for the sensing participation of the cognitive users is weighted and combined and is more than or equal to the fourth predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that the master user is currently transmitting the communication signal.
In this embodiment, the timing for performing the spectrum automatic re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period. Please refer to fig. 3, which is a schematic diagram of a cycle period of a cognitive user. As shown in fig. 3, frame N represents the cycle period of the present round, and frame N +1 represents the cycle period of the next round. The cycle period includes a sensing period τ and a signal transmission period T- τ.
In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
The following describes an automatic spectrum re-sensing method in detail by using different detection methods and decision methods.
One embodiment of the automatic spectrum re-sensing method specifically includes the following steps:
s31, after I detecting communication signals, the I detecting antenna will cyclically shift the signal r by deltai(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai. In this embodiment, each detection antenna independently performs its own decision process. Wherein the ith antenna (I e [1, I ]]) The communication signal at (c) can be represented as ri(n)＝his(n)+vi(n) wherein hi＝[hi1,hi2]Is the channel state between two transmitting antennas of the master user and the ith detecting antenna of the cognitive user, s (n) [ s ]1(n),s2(n)]T，vi(n) represents additive white gaussian noise on the ith antenna.
Each detecting antenna receives its own ri(n) after the collection, cyclically shifting the signal r by delta from the signal ri(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai，
The autocorrelation operation mode comprises the following steps:
wherein, L is the sensing period length, and M is the sum of N and the length of the cyclic prefix.
And S32, the cognitive user makes a comprehensive decision based on the signal characteristics of the communication signal to judge whether to execute spectrum automatic re-sensing.
Each detecting antenna obtains the signal characteristic amplitude | Fi| F is compared with a predetermined detection threshold value Γ if | FiIf | is less than gamma, the detecting antenna determines that the primary user is not transmitting communication signals, if | FiIf | ≧ Γ, each detection antenna determines that the primary user is transmitting the communication signal.
And carrying out spectrum sensing comprehensive judgment on the multi-channel communication signals, and judging that the master user is transmitting the communication signals by x antennas.
In the embodiment, when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signal is greater than or equal to a first preset comprehensive judgment index and less than a second preset comprehensive judgment index, judging to execute the automatic re-sensing of the frequency spectrum; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection. Namely, the first predetermined comprehensive decision index is m1, the second predetermined comprehensive decision index is m2, 1 is not more than m1<m2 is less than or equal to I. If x<m1The root detection antenna judges that the current master user is transmitting the communication signal, and the cognitive user finally judges that the master user is not transmitting the communication signal; if x is more than or equal to m2Judging that the master user is transmitting the communication signal by the detection antenna, and finally judging that the master user is transmitting the communication signal by the cognitive user; the weight sensing condition is that m1 is not more than x<m2And judging that the current master user is transmitting the communication signal, and then the cognitive user performs automatic spectrum re-sensing.
In this embodiment, the timing for performing the spectrum automatic re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
Another embodiment of the automatic spectrum re-sensing method specifically comprises the following steps:
s41, after I detecting antenna detects communication signal, it will cyclically shift delta signal r with itselfi(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai. In this embodiment, each detection antenna independently performs its own decision process. Wherein the ith antenna (I e [1, I ]]) The communication signal at (c) can be represented as ri(n)＝his(n)+vi(n) wherein hi＝[hi1,hi2]Is the channel state between two transmitting antennas of the master user and the ith detecting antenna of the cognitive user, s (n) [ s ]1(n),s2(n)]T，vi(n) represents additive white gaussian noise on the ith antenna.
Each of which isDetecting respective r received by the antennasi(n) after the collection, cyclically shifting the signal r by delta from the signal ri(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai。
The autocorrelation modes of operation include, but are not limited to:
wherein, L is the sensing period length, and M is the sum of N and the length of the cyclic prefix.
And S42, the cognitive user carries out comprehensive decision after weighting and combining based on the signal characteristics of the communication signals so as to judge whether to execute spectrum automatic re-sensing.
And weighting and combining the signal characteristics respectively detected by the plurality of detecting antennas to obtain the final weighted and combined characteristics. The weighted combination operation comprises:
wherein, WiAnd represents the weight corresponding to the ith antenna. Therefore, the multi-channel communication signals are subjected to spectrum sensing comprehensive judgment to be weighted combination characteristics.
In another embodiment, the cognitive users participate in the detection antennas of the detection, and the weighted combination characteristic F of the signal characteristic collected by each of the detection antennas is greater than or equal to a third predetermined integrated decision metric Γ1And is less than a fourth predetermined integrated decision metric Γ2。
The weighted combination characteristic F is less than the third predetermined integrated decision metric Γ1And judging that the master user is not transmitting the communication signal currently. The weighted combination characteristic F is greater than or equal to the fourth predetermined integrated decision index gamma2And judging that the master user is currently transmitting the communication signal.
In this embodiment, the timing for performing the spectrum automatic re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period. Please refer to fig. 3, which is a schematic diagram of a cycle period of a cognitive user. As shown in fig. 3, frame N represents the cycle period of the present round, and frame N +1 represents the cycle period of the next round. The cycle period includes a sensing period and a signal transmission period.
In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
Another embodiment of the automatic spectrum re-sensing method specifically includes the following steps:
s51, after I detecting communication signals, the I detecting antenna will cyclically shift the signal r by deltai(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai. In this embodiment, each detection antenna independently performs its own decision process. Wherein the ith antenna (I e [1, I ]]) The communication signal at (c) can be represented as ri(n)＝his(n)+vi(n) wherein hi＝[hi1,hi2]Two transmitting antennas being primary users and the ith detection of cognitive usersChannel state between antennas, s (n) ═ s1(n),s2(n)]T，vi(n) represents additive white gaussian noise on the ith antenna.
Each detecting antenna's respective ri(n) after the collection, detecting the energy of the communication signal to obtain the energy characteristic F on each detecting antennaiThe energy detection method comprises the following steps:
wherein, L is the sensing period length, and M is the sum of N and the length of the cyclic prefix.
And S52, the cognitive user makes a comprehensive decision based on the energy characteristics of the communication signal to judge whether to execute spectrum automatic re-sensing. .
Each detection antenna individually converts energy characteristic | FiComparing | with a predetermined detection threshold Γ, the comparison includes but is not limited to: if | FiIf | < gamma, the detecting antenna judges that the master user is not transmitting communication signal currently, if | FiIf | ≧ Γ, the detection antenna determines that the primary user is currently transmitting the communication signal.
And the frequency spectrum sensing comprehensive judgment judges that the master user is transmitting the communication signal for the x antennas.
In the embodiment, when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signal is greater than or equal to a first preset comprehensive judgment index and less than a second preset comprehensive judgment index, judging to execute the automatic re-sensing of the frequency spectrum; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection. Namely, the first predetermined comprehensive decision index is m1, the second predetermined comprehensive decision index is m2, 1 is not more than m1<m2 is less than or equal to I. If x<m1All the root detection antennas judge that the current master user is transmitting communication signals, and the cognitive user finally judges the master userNo communication signal is being transmitted; if x is more than or equal to m2Judging that the master user is currently transmitting the communication signals by the detection antennas, and finally judging that the master user is currently transmitting the communication signals by the cognitive user; if m1 is less than or equal to x<m2And judging that the current master user is currently transmitting the communication signal, and then the cognitive user performs automatic spectrum re-sensing.
In this embodiment, the timing for performing the spectrum automatic re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period. In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
The last implementation of the automatic spectrum re-sensing method specifically comprises the following steps:
s61, after I detecting communication signals, the I detecting antenna will cyclically shift the signal r by deltai(n + delta) performing autocorrelation operation to obtain signal characteristics F on each detection antennai. In this embodiment, each detecting antenna independently performs its own determinationAnd (6) determining the process. Wherein the ith antenna (I e [1, I ]]) The communication signal at (c) can be represented as ri(n)＝his(n)+vi(n) wherein hi＝[hi1,hi2]Is the channel state between two transmitting antennas of the master user and the ith detecting antenna of the cognitive user, s (n) [ s ]1(n),s2(n)]T，vi(n) represents additive white gaussian noise on the ith antenna.
Each detecting antenna's respective ri(n) after the collection, detecting the energy of the communication signal to obtain the energy characteristic F on each detecting antennaiThe energy detection method comprises the following steps:
wherein, L is the sensing period length, and M is the sum of N and the length of the cyclic prefix.
And S62, the cognitive user carries out comprehensive decision after weighting and combining based on the signal characteristics of the communication signals so as to judge whether to execute spectrum automatic re-sensing.
In this embodiment, the spectrum sensing comprehensive decision may be a weighted combination of energy characteristics of the at least two communication signals.
And weighting and combining the signal characteristics respectively detected by the plurality of detecting antennas to obtain the final weighted and combined characteristics. The weighted combination operation comprises:
wherein, WiAnd represents the weight corresponding to the ith antenna. Therefore, the multi-channel communication signals are subjected to spectrum sensing comprehensive judgment to be weighted combination characteristics.
In the last embodiment, the cognitive users participate in the detection antennas of the detection, and the weighted combination characteristic F of the energy characteristics collected by the cognitive users is greater than or equal to the third predetermined comprehensive decision index Γ1And is less than a fourth predetermined comprehensive decision indexΓ2Then spectral automatic re-sensing is performed.
If the weighted combination characteristic F of the energy characteristics is smaller than the third predetermined comprehensive judgment index gamma1And judging that the master user is not transmitting the communication signal currently. If the weighted combination characteristic F is more than or equal to the fourth predetermined comprehensive judgment index gamma2And judging that the master user is currently transmitting the communication signal.
In this embodiment, the timing for performing the spectrum automatic re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the automatic spectrum re-sensing method. Those of ordinary skill in the art will understand that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The embodiment provides an automatic spectrum re-sensing method, which performs comprehensive judgment based on detection results among multiple antennas by using signal reception independence among multiple antennas of user equipment, and performs spectrum automatic re-sensing if the detection results among the antennas meet a certain condition. It has the following effective effects:
the method provided by the embodiment can obviously improve the judgment state distinguishing granularity of spectrum sensing, and obviously improves the sensing precision under the same system parameters compared with the prior sensing technology;
second, the method provided in this embodiment has a wide application range, and is suitable for various types of spectrum sensing technologies, such as energy detection sensing, feature detection sensing, and the like.
Thirdly, the method provided by the embodiment is easy to implement, does not need to change the hardware structure of the existing system, and is convenient for practical popularization and application.
Example two
It should be noted that the division of each module of the automatic spectrum re-sensing system is only a division of a logic function, and all or part of the division may be integrated on a physical entity or may be physically separated in actual implementation. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the x module may be called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Please refer to fig. 4, which is a schematic structural diagram of an automatic spectrum re-sensing system in an embodiment. As shown in fig. 4, the automatic spectrum re-sensing system 4 includes an obtaining module 41 and a processing module 42.
The acquiring module 41 is configured to detect a transmission condition of a primary user by using at least two detecting antennas, so as to acquire a detecting result of the detecting antennas or collected detecting contents; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal.
The processing module 42 coupled to the obtaining module 41 is configured to perform a comprehensive decision by the cognitive user according to the detection result or the detection content of the detection antenna, so as to determine whether to perform spectrum auto-re-sensing.
When the detection result of the detection antennas which are cognitively involved in the detection indicates that the number of the detection antennas of the master user which is currently transmitting the communication signal is greater than or equal to a first preset comprehensive judgment index and less than a second preset comprehensive judgment index, the processing module 42 judges to execute the automatic re-sensing of the frequency spectrum; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection.
When the detection result of the detection antennas which are cognitively involved in the detection indicates that the number of the detection antennas of the master user which is currently transmitting the communication signal is less than the first predetermined comprehensive judgment index, the processing module 42 judges that the spectrum automatic re-sensing is not executed, and directly outputs the spectrum sensing judgment result that the master user is not currently transmitting the communication signal.
When the detection result of the detection antennas involved in the cognitive detection is that the number of the detection antennas of the master user transmitting the communication signals currently is greater than or equal to the second predetermined comprehensive judgment index, the processing module 42 judges that the spectrum automatic re-sensing is not executed, and directly outputs the spectrum sensing judgment result of the master user transmitting the communication signals currently.
The processing module 42 determines to execute the spectrum automatic re-sensing when the content collected by the sensing antennas involved in sensing is weighted and combined and is greater than or equal to a third predetermined comprehensive decision index and smaller than a fourth predetermined comprehensive decision index.
When the content collected by each of the sensing antennas involved in sensing is weighted and combined and then is smaller than the third predetermined comprehensive decision index, the processing module 42 determines not to execute spectrum automatic re-sensing and directly outputs a spectrum sensing decision result that the master user does not transmit a communication signal currently; and when the content collected by the sensing antennas for the sensing participation of the cognitive users is weighted and combined and is more than or equal to the fourth predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that the master user is currently transmitting the communication signal.
In this embodiment, the timing for the processing module 42 to perform the spectrum auto-re-sensing includes: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
In this embodiment, spectrum automatic re-sensing is performed according to the sensing times of continuous spectrum automatic re-sensing corresponding to single conventional sensing. The sensing times of the automatic re-sensing of the continuous spectrum corresponding to the single conventional sensing comprise:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
EXAMPLE III
The present embodiment provides a terminal, including: a processor, a memory, a transceiver, a communication interface, and a system bus; the memory is used for storing computer programs, the communication interface is used for communicating with other devices, and the processor and the transceiver are used for operating the computer programs to enable the terminal to execute the steps of the automatic spectrum re-sensing method.
The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The memory may include a Random Access Memory (RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the integrated circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
In summary, the method, the system, the computer-readable storage medium, and the terminal for automatic spectrum re-sensing provided by the present invention utilize the signal reception independence among multiple antennas of the user equipment, perform comprehensive decision based on the detection results among the multiple antennas, and perform spectrum automatic re-sensing if the detection results among the antennas satisfy a certain condition. It has the following effective effects:
firstly, the invention can obviously improve the judgment state distinguishing granularity of frequency spectrum sensing, and obviously improve the sensing precision under the same system parameters compared with the prior sensing technology;
secondly, the invention has wide application range and is suitable for various spectrum sensing technologies, such as energy detection sensing, feature detection sensing and the like.
Thirdly, the invention is easy to implement, does not need to change the hardware structure of the existing system, and is convenient for practical popularization and application. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. An automatic spectrum re-sensing method, comprising:
step one, a cognitive user detects the transmission condition of a master user by utilizing at least two detection antennas so as to obtain the detection result of the detection antennas or collected detection contents; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal;
step two, the cognitive user carries out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute spectrum automatic re-sensing or not; the second step comprises the following steps: judging to execute automatic spectrum re-sensing when the sensing result of the sensing antenna which is used by the cognitive user to participate in sensing is that the number of the sensing antennas which are used by the master user to transmit the communication signal currently is greater than or equal to a first preset comprehensive judgment index and is smaller than a second preset comprehensive judgment index; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection.
2. The method according to claim 1, wherein the timing of performing the spectrum autorecognitions comprises: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
3. The method of claim 1, wherein the detecting of the primary user transmission by the cognitive user using at least two detecting antennas comprises: an energy threshold detection mode, a main user signal characteristic detection mode or a main user signal waveform matching detection mode.
4. The method of automatic spectrum re-perception of claim 1,
the step of making a comprehensive decision by the cognitive user according to the detection result of the detection antenna to determine whether to execute the spectrum automatic re-sensing further comprises:
when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is less than the first preset comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting the spectrum sensing judgment result that the master user currently does not transmit the communication signals;
and when the detection result of the detection antennas of the cognitive user participating in the detection is that the number of the detection antennas of the master user currently transmitting the communication signals is greater than or equal to the second preset comprehensive judgment index, judging not to execute the spectrum automatic re-sensing, and directly outputting the spectrum sensing judgment result of the master user currently transmitting the communication signals.
5. The method as claimed in claim 1, wherein the step of the cognitive user performing a comprehensive decision according to the collected sensing content of the sensing antenna to determine whether to perform spectrum automatic re-sensing comprises:
and judging to execute the automatic re-sensing of the frequency spectrum when the content collected by the sensing antennas participating in the sensing by the cognitive user is weighted and combined to be more than or equal to a third preset comprehensive judgment index and is less than a fourth preset comprehensive judgment index.
6. The method of automatic spectrum re-perception of claim 5,
when the content collected by the sensing antennas of the cognitive users participating in the sensing is weighted and combined and then is smaller than the third predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that a master user does not transmit communication signals currently; and when the content collected by the sensing antennas for the sensing participation of the cognitive users is weighted and combined and is more than or equal to the fourth predetermined comprehensive judgment index, judging that the spectrum automatic re-sensing is not executed, and directly outputting a spectrum sensing judgment result that the master user is currently transmitting the communication signal.
7. The method of automatic spectrum re-perception according to any of claims 1-6,
the sensing times of the continuous spectrum automatic re-sensing corresponding to the single conventional sensing comprise the following steps:
limiting that the frequency spectrum automatic re-sensing can be carried out only once per time of conventional sensing;
limiting the heavy sensing with the upper limit times, namely judging that the first time of automatic re-sensing of the frequency spectrum corresponding to a certain conventional sensing still needs to be performed, performing the second time of automatic re-sensing of the frequency spectrum, wherein the repeated automatic re-sensing times of the frequency spectrum do not exceed the preset upper limit times;
frequency spectrum automatic re-sensing with unlimited times, namely, the first time frequency spectrum automatic re-sensing corresponding to single conventional sensing is still judged to be required to be re-sensed, then frequency spectrum automatic re-sensing can be carried out again, and the frequency of repeated frequency spectrum automatic re-sensing is unlimited times.
8. An automatic spectrum re-sensing system, comprising:
the acquisition module is used for detecting the transmission condition of the master user by utilizing at least two detection antennas so as to acquire the detection result of the detection antennas or the collected detection content; the master user transmission condition comprises that a master user is currently transmitting a communication signal or the master user is not currently transmitting the communication signal;
the processing module is used for the cognitive user to carry out comprehensive decision according to the detection result or the detection content of the detection antenna so as to judge whether to execute spectrum automatic re-sensing or not; the processing module is used for judging whether the detection result of the detection antennas which are used by the cognitive user to participate in detection is that the number of the detection antennas which are used by the master user to transmit communication signals currently is larger than or equal to a first preset comprehensive judgment index and smaller than a second preset comprehensive judgment index, and then judging to execute automatic re-sensing of the frequency spectrum; the first predetermined comprehensive decision index is greater than or equal to 1 and smaller than the second predetermined comprehensive decision index, and the second predetermined comprehensive decision index is smaller than or equal to the total number of the detection antennas participating in detection.
9. The system according to claim 8, wherein the processing module performs the spectrum autorecognitions at an opportunity comprising: occupying part of time period of a signal transmission period in the cycle period of the current round, and immediately sensing the frequency spectrum automatically and again after the sensing period in the cycle period of the current round; or replacing the conventional sensing in the next round of cycle period, and performing the spectrum automatic re-sensing corresponding to the previous round of conventional sensing in the sensing period in the next round of cycle period.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method for automatic spectrum re-sensing according to any one of claims 1 to 7.
11. A terminal, comprising: at least two detecting antennas, a processor and a memory;
the detecting antenna is used for detecting a communication signal from main user transmission;
the memory is for storing a computer program and the processor is for executing the computer program stored by the memory to cause the processor to perform the method of automatic spectrum re-perception according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013794.3A CN108235328B (en) | 2018-01-08 | 2018-01-08 | Automatic spectrum re-sensing method, system, computer readable storage medium and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013794.3A CN108235328B (en) | 2018-01-08 | 2018-01-08 | Automatic spectrum re-sensing method, system, computer readable storage medium and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108235328A CN108235328A (en) | 2018-06-29 |
| CN108235328B true CN108235328B (en) | 2022-03-01 |
Family
ID=62643228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810013794.3A Active CN108235328B (en) | 2018-01-08 | 2018-01-08 | Automatic spectrum re-sensing method, system, computer readable storage medium and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108235328B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181669B (en) * | 2020-01-03 | 2022-02-11 | 中国科学院上海高等研究院 | Self-adaptive spectrum sensing method, system, medium and terminal based on pre-evaluation processing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255675A (en) * | 2010-05-19 | 2011-11-23 | 索尼公司 | Spectrum sensing device, method and program based on cognitive radio |
| CN102571241A (en) * | 2012-02-20 | 2012-07-11 | 江苏新大诚信息技术有限公司 | Improved double-threshold cooperative spectrum sensing method |
| CN104601264A (en) * | 2015-02-27 | 2015-05-06 | 吉首大学 | Multi-antenna spectrum sensing method applicable to high-dimension finite sample conditions |
| CN105357677A (en) * | 2015-12-15 | 2016-02-24 | 上海电机学院 | High-efficiency communication method using multi-antennas in cognitive radio system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8213868B2 (en) * | 2009-04-17 | 2012-07-03 | Lingna Holdings Pte., Llc | Exploiting multiple antennas for spectrum sensing in cognitive radio networks |
-
2018
- 2018-01-08 CN CN201810013794.3A patent/CN108235328B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255675A (en) * | 2010-05-19 | 2011-11-23 | 索尼公司 | Spectrum sensing device, method and program based on cognitive radio |
| CN102571241A (en) * | 2012-02-20 | 2012-07-11 | 江苏新大诚信息技术有限公司 | Improved double-threshold cooperative spectrum sensing method |
| CN104601264A (en) * | 2015-02-27 | 2015-05-06 | 吉首大学 | Multi-antenna spectrum sensing method applicable to high-dimension finite sample conditions |
| CN105357677A (en) * | 2015-12-15 | 2016-02-24 | 上海电机学院 | High-efficiency communication method using multi-antennas in cognitive radio system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108235328A (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107395301B (en) | Spectrum sensing method and device based on K-means algorithm | |
| CN106658652B (en) | Method and device for connecting WiFi hotspot | |
| US20210111819A1 (en) | Method of Reporting RSSI Measurements in an Unlicensed Band and Related Apparatus | |
| CN103209037B (en) | Multi-channel collaborative spectrum sensing method based on iterative filtering | |
| CN105978644B (en) | Star based on cuckoo searching algorithm ground cognitive system frequency spectrum access method | |
| CN107295557A (en) | The interference detection method and device of a kind of zigbee network | |
| CN112020098A (en) | Load balancing method and device, computing equipment and computer storage medium | |
| CN108235328B (en) | Automatic spectrum re-sensing method, system, computer readable storage medium and terminal | |
| CN107820322B (en) | Network access method, terminal and device with storage function | |
| CN108880717A (en) | A kind of frequency spectrum sensing method of the α divergence based on information geometry | |
| CN116338434A (en) | Average power consumption measuring method and device | |
| CN110288025A (en) | Frequency spectrum sensing method, device and equipment based on information geometry and spectral clustering | |
| CN111669206A (en) | Signal detection method and device | |
| CN101807961B (en) | Method for realizing spectrum sensing based on bi-spectrum diagonal slice | |
| CN112994813B (en) | Adaptive sampling frequency spectrum sensing method and related device | |
| CN102300115B (en) | Method for rapidly identifying analog, digital television signal, apparatus thereof and communication receiver | |
| CN102118200B (en) | Spectrum detecting method based on covariance absolute value method | |
| CN111181669B (en) | Self-adaptive spectrum sensing method, system, medium and terminal based on pre-evaluation processing | |
| CN112260777B (en) | Eigenvalue frequency spectrum sensing method based on sequential detection | |
| CN102820955B (en) | Secondary user's node is to the non-uniform quantizing method of frequency spectrum perception information | |
| CN102594397B (en) | Multi-path signal processing method and device | |
| CN112532288B (en) | Diversity combining selection method and device for gateway of Internet of things | |
| CN112736455B (en) | Antenna device and method for determining radiation pattern thereof | |
| CN109347583A (en) | Cooperation frequency spectrum sensing method based on nuclear space optimization under noise uncertain condition | |
| CN105099575B (en) | Broadcast television signal real-time perception system and method based on MATLAB GUI |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |