CN111565162B - Dynamic GSM system interference avoidance method, device, storage medium and terminal - Google Patents

Dynamic GSM system interference avoidance method, device, storage medium and terminal Download PDF

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CN111565162B
CN111565162B CN202010219559.9A CN202010219559A CN111565162B CN 111565162 B CN111565162 B CN 111565162B CN 202010219559 A CN202010219559 A CN 202010219559A CN 111565162 B CN111565162 B CN 111565162B
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noise power
gsm system
subcarrier
power estimation
interfered
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CN111565162A (en
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赵辉
张奭
张�诚
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Beijing Hannuo Semiconductor Technology Co ltd
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Beijing Hannuo Semiconductor Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2681—Details of algorithms characterised by constraints
    • H04L27/2688—Resistance to perturbation, e.g. noise, interference or fading
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
    • 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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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a dynamic GSM system interference avoiding method, a device, a storage medium and a terminal, wherein the method comprises the following steps: acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, subcarrier intervals and the frequency characteristics of the GSM system; detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set; judging whether detection subcarriers corresponding to the noise power estimation values exist and are interfered by a GSM system or not according to the noise power estimation values in the noise power estimation value set; and if the detection sub-carrier is interfered by the GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system. Therefore, the interference of the GSM system can be reduced by adopting the embodiment of the application.

Description

Dynamic GSM system interference avoidance method, device, storage medium and terminal
Technical Field
The invention relates to the technical field of computers, in particular to a method, a device, a storage medium and a terminal for avoiding interference of a dynamic GSM system.
Background
With the rapid development of the scale of the communication network and the number of users, the GSM system of the GSM system has wider and wider network coverage and increasingly tense spectrum resources, and for a communication system, if the working frequency band overlaps with the GSM system, corresponding interference is brought.
In actual planning, a GSM system usually uses a frequency point multiplexing scheme of 4 base stations and 3 cells (one base station is divided into 3 sectors, and a frequency multiplexing mode of 4X3 is adopted) or 3 base stations and 3 cells, and if a communication system is mainly affected by an uplink frequency band of a GSM system 900, since the uplink frequency band of the GSM system 900 has 124 frequency points, the maximum number of frequency points affected by the interference of the GSM system in the same geographic area is 10 to 14. Because technologies such as TDMA, frequency modulation and the like are adopted in a GSM system network, dynamic characteristics of GSM system interference occur, namely the characteristic that the GSM system interference on one frequency point shows that the GSM system interference sometimes does not exist or instantly jumps to other frequency points, so that the traditional interference detection algorithm cannot be well applied to the existing communication system, and the interference of the GSM system to the communication system is increased.
Disclosure of Invention
The embodiment of the application provides a method and a device for avoiding interference of a dynamic GSM system, a storage medium and a terminal. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In a first aspect, an embodiment of the present application provides a dynamic GSM system interference avoidance method, where the method includes:
step 1: acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, subcarrier intervals and the frequency characteristics of the GSM system;
step 2: detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set;
and 3, step 3: judging whether the detection sub-carriers corresponding to the noise power estimation values are interfered by a GSM system or not according to the noise power estimation values in the noise power estimation value set;
and 4, step 4: and if the detection sub-carrier is interfered by the GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system.
Optionally, after the closing the currently detected sub-carrier and initiating the maintenance on the OFDM system, the method further includes:
and when the current detection subcarrier is closed and the OFDM system is maintained, continuing to execute the steps 2 to 4 in the claim 1 to avoid the interference of the dynamic GSM system.
Optionally, the obtaining the subcarrier range set interfered by the GSM system according to the parameter of the OFDM system includes:
and calculating a subcarrier range value set of the OFDM system corresponding to the overlapped frequency spectrum according to the overlapping of the working frequency spectrums of the OFDM system and the GSM system.
Optionally, the determining, according to each noise power estimation value in the noise power estimation value set, whether a detected subcarrier corresponding to each noise power estimation value is interfered by a GSM system includes:
acquiring a maximum noise power estimation value in the noise power estimation value set;
acquiring a subcarrier number corresponding to the maximum noise power estimation value;
calculating and generating a noise power average value based on the set of noise power estimation values;
and when the maximum noise power estimation value is larger than the product of the noise power average value and a threshold value Th, determining that the frequency point corresponding to the subcarrier number is interfered by a GSM system.
Optionally, the maintenance is initiated on the OFDM system, specifically, CQI (Carrier Quality Index) of the system is recalculated, and the CQI of the closed subcarrier is set to zero.
Optionally, the performing of dynamic GSM system interference avoidance includes detecting narrowband interference of a GSM system and the like uninterruptedly according to a preset detection period, where the detection period may be one or several signaling periods.
In a second aspect, an embodiment of the present application provides a dynamic GSM system interference avoidance apparatus, where the apparatus includes:
the range value acquisition module is used for acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, the subcarrier interval and the frequency characteristics of the GSM system;
an estimated value set generating module, configured to detect each subcarrier in the subcarrier range set based on a preset period, and generate a noise power estimated value set;
the subcarrier judging module is used for judging whether the detection subcarriers corresponding to the noise power estimated values are interfered by a GSM system or not according to the noise power estimated values in the noise power estimated value set;
and the subcarrier closing module is used for closing the detection subcarrier and initiating maintenance to the OFDM system if the detection subcarrier is interfered by the GSM system.
In a third aspect, embodiments of the present application provide a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-mentioned method steps.
In a fourth aspect, an embodiment of the present application provides a terminal, which may include: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the embodiment of the application, a user terminal firstly obtains a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, the parameters of the OFDM system at least comprise working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system, then detects each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set, then judges whether a detection subcarrier corresponding to each noise power estimation value is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set, and finally closes the detection subcarrier and initiates maintenance on the OFDM system if the detection subcarrier is interfered by the GSM system. According to the scheme of dividing the frequency points of the GSM system, the frequency points of the GSM system which have influence on the system are dynamically detected, and the subcarriers which are interfered in the OFDM system are turned off according to the detected frequency points, namely the subcarriers are not used for modulating useful data, so that the interference of the GSM system to the communication system is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic flowchart of a dynamic GSM system interference avoidance method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a situation that an OFDM system is interfered by a GSM system according to an embodiment of the present application;
fig. 3 is a flow chart of GSM system interference determination processing in an embodiment of a dynamic GSM system interference avoidance method provided in the embodiment of the present application;
fig. 4 is a schematic flowchart of another dynamic GSM system interference avoidance method according to an embodiment of the present application;
fig. 5 is a schematic device diagram of a dynamic GSM system interference avoidance apparatus provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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 invention.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
So far, in actual planning, a GSM system usually uses a 4-base-station 3-cell (one base station is divided into 3 sectors, and a frequency multiplexing mode of 4X3 is adopted) or a frequency point multiplexing scheme of a 3-base-station 3-cell, and if a communication system is mainly affected by an uplink frequency band of a GSM system 900, since the uplink frequency band of the GSM system 900 has 124 frequency points, the maximum number of frequency points affected by the interference of the GSM system in the same geographic area is 10 to 14. Because technologies such as TDMA, frequency modulation and the like are adopted in a GSM system network, dynamic characteristics of GSM system interference occur, namely the characteristic that the GSM system interference on one frequency point shows that the GSM system interference sometimes does not exist or instantly jumps to other frequency points, so that the traditional interference detection algorithm cannot be well applied to the existing communication system, and the interference of the GSM system to the communication system is increased. Therefore, the application provides a dynamic GSM system interference avoidance method, device, storage medium and terminal to solve the problems in the related art. In the technical solution provided by the present application, according to the scheme of frequency point division of the GSM system, the frequency point of the GSM system affecting the system is dynamically detected, and the subcarrier affected by interference in the OFDM system is turned off according to the detected frequency point, that is, the subcarrier is not used to modulate useful data, so that the interference of the GSM system to the communication system is reduced, which is described in detail below with an exemplary embodiment.
The dynamic GSM system interference avoidance method provided in the embodiment of the present application will be described in detail below with reference to fig. 1 to 4. The method may be implemented in dependence on a computer program, operable on a dynamic GSM system interference avoidance device based on the von neumann architecture. The computer program may be integrated into the application or may run as a separate tool-like application. The dynamic GSM system interference avoidance apparatus in the embodiment of the present application may be a user terminal, including but not limited to: personal computers, tablet computers, handheld devices, in-vehicle devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and the like. The user terminals may be called different names in different networks, for example: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Personal Digital Assistant (PDA), terminal equipment in a 5G network or future evolution network, and the like.
Referring to fig. 1, a schematic flow chart of a dynamic GSM system interference avoidance method is provided in an embodiment of the present application. As shown in fig. 1, the method of the embodiment of the present application may include the steps of:
s101, step 1: acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, subcarrier intervals and the frequency characteristics of the GSM system;
in the embodiment of the application, the range of subcarriers possibly interfered by a GSM system (global system for mobile communications) is determined according to the operating frequency of the OFDM system, the subcarrier spacing, the frequency characteristics of the GSM system, and the like, wherein one frequency point of the GSM system may affect several OFDM subcarriers.
In a possible implementation manner, firstly, the CPU sets a global array GSM system _ flag with a length of N, each bit indicates whether there is GSM system interference for one subcarrier, 1 indicates no interference, and sets the GSM system _ flag vector to all 1 s.
For example, as shown in fig. 2, when the OFDM communication system shown in fig. 2 is interfered by the GSM system, it is determined that the OFDM communication system is mainly interfered by frequency bands from f1 to f2 of the GSM system, and a formula for one GSM system frequency point interference source possibly affecting the number of OFDM subcarriers is n ═ n △ f1/ △ f2, wherein △ f1 is the bandwidth of a single narrowband interfering system, △ f2 is the subcarrier spacing of an OFDM system.
S102, step 2: detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set;
usually, when determining whether there is interference, the maximum noise power and the corresponding subcarrier number may be found first, and the average of the noise powers in the neighborhood may be calculated.
In the embodiment of the present application, after determining the range of the interfering sub-carrier based on step S102, the noise power estimation value of each sub-carrier of the detection system is determined based on the preset cycle time, and whether the interference of the GSM system exists in the sub-carrier is determined according to the noise power. When judging whether interference exists, the maximum value of the noise power and the corresponding subcarrier number can be found out firstly, and the average value of the noise power in the neighborhood is calculated.
In a feasible implementation manner, a terminal CPU is used to read the noise power estimation value of each subcarrier, then the maximum noise power value of all subcarriers with GSM system _ flag equal to 1 and the corresponding subcarrier number are searched, and finally the average value of noise power in nPeak neighborhood is calculated.
S103, step 3: judging whether the detection sub-carriers corresponding to the noise power estimation values are interfered by a GSM system or not according to the noise power estimation values in the noise power estimation value set;
generally, the method for determining whether there is interference is that, if the maximum noise power estimation value is greater than the product of the average value of the noise power and the threshold Th, it is determined that there is GSM system interference at the frequency point, and finally, the frequency point is closed and system maintenance is performed, and when system maintenance is performed, the CQI (Carrier Quality Index) of the system needs to be recalculated, and the CQI of the closed subcarrier is set to zero.
In the embodiment of the application, the maximum noise power estimation value in the noise power estimation value set is obtained firstly, then the subcarrier number corresponding to the maximum noise power estimation value is obtained, then a noise power average value is calculated and generated based on the noise power estimation value set, and finally when the maximum noise power estimation value is larger than the product of the noise power average value and a threshold value Th, the frequency point corresponding to the subcarrier number is determined to be interfered by a GSM system.
In a feasible implementation manner, if the maximum value of the noise power is greater than (the product of the average value and the threshold Th), it is considered that the interference of the GSM system exists in the subcarrier, and the GSM system _ flag corresponding to n subcarriers near the subcarrier number is set to zero, that is, the subcarriers near the subcarrier number are closed, and the maintenance of the system is actively initiated; and if the maximum value of the noise power of the subcarrier does not meet the threshold condition, continuing the next detection.
S104, step 4: and if the detection sub-carrier is interfered by the GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system.
In the embodiment of the application, the GSM system _ flag needs to be initialized, and an aging time can be set, for example, a new initialization is performed every hour, so that the subcarriers which are not interfered by the GSM system any more are released according to the characteristic of the randomization of the interference frequency points of the GSM system, and the utilization rate of the system frequency band is ensured.
In this embodiment of the present application, a multiple-time monitoring mechanism may be set, in step 1), the GSM system _ flag may be initialized to be all n, when a certain subcarrier monitors GSM system interference once, only the GSM system _ flag of the subcarrier is reduced by 1, and is reduced to 0 at minimum, and when the GSM system _ flag of the subcarrier is 0, the subcarrier is closed, and active maintenance is triggered. The threshold value Th may be determined according to the actual situation of the system, which is not limited herein, and n subcarriers near the interference point are set to zero, where n may be determined by the method shown in fig. 2, that is, n is equal to n △ f1/ △ f2。
For example, as shown in fig. 3, fig. 3 is a flow chart of GSM system interference determination processing in an embodiment of the dynamic GSM system interference avoidance method provided in this embodiment of the present application, when the interference determination processing is performed, a global variable GSM system _ flag is initialized to all 1(01 vectors, n bits in total), then detection is performed in an interference detection module, when detection is performed, first after admission or maintenance is completed, a CPU reads a subcarrier noise power value, then searches for a maximum noise power of the GSM system _ flag being 1 and a corresponding subcarrier position, if the maximum noise power is greater than an average value Th of neighborhood noise, it is determined that there is interference at the subcarrier position, and simultaneously, the GSM system _ flag corresponding to 3 subcarriers near the subcarrier position is set to zero, after the zero setting, the detection is completed, if new interference is detected, maintenance is actively initiated, in a process of calculating CQI at a maintenance stage, cai (cai) GSM system flag, when maintenance is finished, the module returns to interference detection module to detect again.
In the embodiment of the application, a user terminal firstly obtains a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, the parameters of the OFDM system at least include working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system, detects each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set, then judges whether a detected subcarrier corresponding to each noise power estimation value is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set, and finally closes the detected subcarrier and initiates maintenance on the OFDM system if the detected subcarrier is interfered by the GSM system. According to the scheme of dividing the frequency points of the GSM system, the frequency points of the GSM system which have influence on the system are dynamically detected, and the subcarriers which are interfered in the OFDM system are turned off according to the detected frequency points, namely the subcarriers are not used for modulating useful data, so that the interference of the GSM system to the communication system is reduced.
Please refer to fig. 4, which is a flowchart illustrating a dynamic GSM system interference avoidance method according to an embodiment of the present application. The embodiment exemplifies that the dynamic GSM system interference avoidance method is applied to the user terminal. The dynamic GSM system interference avoidance method can comprise the following steps:
s201, acquiring a subcarrier range value set interfered by a frequency band f1 to a frequency band f2 of a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system;
s202, detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set;
s203, acquiring a maximum noise power estimation value in the noise power estimation value set;
s204, acquiring a subcarrier number corresponding to the maximum noise power estimation value;
s205, calculating and generating a noise power average value based on the noise power estimation value set;
and S206, when the maximum noise power estimated value is larger than the product of the noise power average value and the threshold value Th, determining that the frequency point corresponding to the subcarrier number is interfered by the GSM system.
S207, if the detection sub-carrier is interfered by a GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system;
and S208, after the subcarrier is closed, returning to the step S202 to continue executing, and continuously detecting and avoiding the interference.
In the embodiment of the application, a user terminal firstly obtains a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, the parameters of the OFDM system at least include working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system, detects each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set, then judges whether a detected subcarrier corresponding to each noise power estimation value is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set, and finally closes the detected subcarrier and initiates maintenance on the OFDM system if the detected subcarrier is interfered by the GSM system. According to the scheme of dividing the frequency points of the GSM system, the frequency points of the GSM system influencing the system are dynamically detected, and the sub-carriers interfered in the OFDM system are turned off according to the detected frequency points, namely the sub-carriers are not used for modulating useful data, so that the interference of the GSM system to the communication system is reduced.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
Referring to fig. 5, a schematic structural diagram of a dynamic GSM system interference avoidance apparatus according to an exemplary embodiment of the present invention is shown. The dynamic GSM system interference avoidance apparatus may be implemented as all or part of the terminal by software, hardware, or a combination of both. The device 1 comprises a range value acquisition module 10, an estimation value set generation module 20, a subcarrier judgment module 30 and a subcarrier closing module 40.
A range value obtaining module 10, configured to obtain a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, where the parameters of the OFDM system at least include a working frequency of the OFDM system, a subcarrier interval, and a frequency characteristic of the GSM system;
an estimated value set generating module 20, configured to detect each subcarrier in the subcarrier range set based on a preset period, and generate a noise power estimated value set;
the subcarrier judging module 30 is configured to judge whether a detected subcarrier corresponding to each noise power estimation value is interfered by a GSM system according to each noise power estimation value in the noise power estimation value set;
a subcarrier closing module 40, configured to close the detected subcarrier and initiate maintenance on the OFDM system if the detected subcarrier is interfered by the GSM system.
It should be noted that, when the dynamic GSM system interference avoidance apparatus provided in the foregoing embodiment executes the dynamic GSM system interference avoidance method, only the division of the functional modules is described as an example, in practical application, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the dynamic GSM system interference avoidance apparatus provided in the above embodiment and the dynamic GSM system interference avoidance method embodiment belong to the same concept, and details of the implementation process are shown in the method embodiment, which are not described herein again.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the embodiment of the application, a user terminal firstly obtains a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, the parameters of the OFDM system at least include working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system, detects each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set, then judges whether a detected subcarrier corresponding to each noise power estimation value is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set, and finally closes the detected subcarrier and initiates maintenance on the OFDM system if the detected subcarrier is interfered by the GSM system. According to the scheme of dividing the frequency points of the GSM system, the frequency points of the GSM system which have influence on the system are dynamically detected, and the subcarriers which are interfered in the OFDM system are turned off according to the detected frequency points, namely the subcarriers are not used for modulating useful data, so that the interference of the GSM system to the communication system is reduced.
The present invention also provides a computer readable medium, on which program instructions are stored, and when the program instructions are executed by a processor, the program instructions implement the dynamic GSM system interference avoidance method provided by the above-mentioned method embodiments. The present invention also provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the dynamic GSM system interference avoidance method described in the various method embodiments above.
Please refer to fig. 6, which provides a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in fig. 6, the terminal 1000 can include: at least one processor 1001, at least one network interface 1004, a user interface 1003, memory 1005, at least one communication bus 1002.
Wherein a communication bus 1002 is used to enable connective communication between these components.
The user interface 1003 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
Processor 1001 may include one or more processing cores, among other things. The processor 1001 interfaces various components throughout the electronic device 1000 using various interfaces and lines to perform various functions of the electronic device 1000 and to process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 1005 and invoking data stored in the memory 1005. Alternatively, the processor 1001 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 1001 may integrate one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. Wherein, the CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It is understood that the modem may not be integrated into the processor 1001, but may be implemented by a single chip.
The Memory 1005 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable medium. The memory 1005 may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory 1005 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like; the storage data area may store data and the like referred to in the above respective method embodiments. The memory 1005 may optionally be at least one memory device located remotely from the processor 1001. As shown in fig. 6, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a dynamic GSM system interference avoidance application.
In the terminal 1000 shown in fig. 6, the user interface 1003 is mainly used as an interface for providing input for a user, and acquiring data input by the user; and the processor 1001 may be configured to invoke the dynamic GSM system interference avoidance application stored in the memory 1005, and specifically perform the following operations:
step 1: acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, subcarrier intervals and the frequency characteristics of the GSM system;
and 2, step: detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set;
and step 3: judging whether the detection sub-carriers corresponding to the noise power estimation values are interfered by a GSM system or not according to the noise power estimation values in the noise power estimation value set;
and 4, step 4: and if the detection sub-carrier is interfered by the GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system.
In an embodiment, when the processor 1001 performs the following operation to obtain the subcarrier range set interfered by the GSM system according to the parameters of the OFDM system:
and calculating a subcarrier range value set of the OFDM system corresponding to the overlapped frequency spectrum according to the overlapping of the working frequency spectrums of the OFDM system and the GSM system.
In an embodiment, when the processor 1001 determines whether there is interference from the GSM system in the detection sub-carrier corresponding to each noise power estimation value according to each noise power estimation value in the noise power estimation value set, specifically performs the following operations:
acquiring a maximum noise power estimation value in the noise power estimation value set;
acquiring a subcarrier number corresponding to the maximum noise power estimation value;
calculating and generating a noise power average value based on the set of noise power estimation values;
and when the maximum noise power estimation value is larger than the product of the noise power average value and a threshold value Th, determining that the frequency point corresponding to the subcarrier number is interfered by a GSM system.
In the embodiment of the application, a user terminal firstly obtains a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, the parameters of the OFDM system at least include working frequency, subcarrier interval and GSM system frequency characteristics of the OFDM system, detects each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set, then judges whether a detected subcarrier corresponding to each noise power estimation value is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set, and finally closes the detected subcarrier and initiates maintenance on the OFDM system if the detected subcarrier is interfered by the GSM system. According to the scheme of dividing the frequency points of the GSM system, the frequency points of the GSM system which have influence on the system are dynamically detected, and the subcarriers which are interfered in the OFDM system are turned off according to the detected frequency points, namely the subcarriers are not used for modulating useful data, so that the interference of the GSM system to the communication system is reduced.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and should not be taken as limiting the scope of the present application, so that the present application will be covered by the appended claims.

Claims (8)

1. A dynamic GSM system interference avoidance method is characterized by comprising the following steps:
step 1: acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, subcarrier intervals and the frequency characteristics of the GSM system;
step 2: detecting each subcarrier in the subcarrier range set based on a preset period to generate a noise power estimation value set;
and step 3: judging whether detection subcarriers corresponding to the noise power estimation values exist and are interfered by a GSM system or not according to the noise power estimation values in the noise power estimation value set;
and 4, step 4: if the detection sub-carrier is interfered by a GSM system, closing the detection sub-carrier and initiating maintenance to the OFDM system; wherein the content of the first and second substances,
the determining whether the detected sub-carrier corresponding to each noise power estimation value exists and is interfered by the GSM system according to each noise power estimation value in the noise power estimation value set includes:
acquiring a maximum noise power estimation value in the noise power estimation value set;
acquiring a subcarrier number corresponding to the maximum noise power estimation value;
calculating and generating a noise power average value based on the set of noise power estimation values;
and when the maximum noise power estimation value is larger than the product of the noise power average value and a threshold value Th, determining that the frequency point corresponding to the subcarrier number is interfered by a GSM system.
2. The method of claim 1, wherein after the shutting down the detected sub-carriers and initiating maintenance for the OFDM system, further comprising:
and when the detection sub-carrier is closed and the maintenance of the OFDM system is completed, continuing to execute the steps 2 to 4 in the claim 1 to perform dynamic GSM system interference avoidance.
3. The method of claim 1, wherein the obtaining the range set of subcarriers interfered by the GSM system according to the parameters of the OFDM system comprises:
and calculating the subcarrier range value set of the OFDM system corresponding to the overlapped frequency spectrum according to the overlapping of the working frequency spectrums of the OFDM system and the GSM system.
4. The method according to claim 1, wherein the maintenance is initiated on the OFDM system, in particular recalculating a Carrier Quality Index (CQI) of the system, and zeroing the CQI of the closed subcarriers.
5. The method of claim 2, wherein the performing dynamic GSM system interference avoidance comprises detecting GSM system narrowband interference continuously according to a preset detection period, and the detection period is one or several signaling periods.
6. A dynamic GSM system interference avoidance apparatus, the apparatus comprising:
the range value acquisition module is used for acquiring a subcarrier range set interfered by a GSM system according to parameters of the OFDM system, wherein the parameters of the OFDM system at least comprise the working frequency of the OFDM system, the subcarrier interval and the frequency characteristics of the GSM system;
an estimated value set generating module, configured to detect each subcarrier in the subcarrier range set based on a preset period, and generate a noise power estimated value set;
the subcarrier judging module is used for judging whether the detection subcarriers corresponding to the noise power estimated values are interfered by a GSM system or not according to the noise power estimated values in the noise power estimated value set;
a subcarrier closing module, configured to close the detected subcarrier and initiate maintenance on the OFDM system if the detected subcarrier is interfered by a GSM system; wherein the content of the first and second substances,
the subcarrier judgment module is specifically configured to:
acquiring a maximum noise power estimation value in the noise power estimation value set;
acquiring a subcarrier number corresponding to the maximum noise power estimation value;
calculating and generating a noise power average value based on the set of noise power estimation values;
and when the maximum noise power estimation value is larger than the product of the noise power average value and a threshold value Th, determining that the frequency point corresponding to the subcarrier number is interfered by a GSM system.
7. A computer storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to perform the method steps according to any of claims 1 to 5.
8. A terminal, comprising: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method steps according to any of claims 1-5.
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