CN101959228B - OFDMA system interference analytical method and device thereof - Google Patents
OFDMA system interference analytical method and device thereof Download PDFInfo
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- CN101959228B CN101959228B CN200910158111.4A CN200910158111A CN101959228B CN 101959228 B CN101959228 B CN 101959228B CN 200910158111 A CN200910158111 A CN 200910158111A CN 101959228 B CN101959228 B CN 101959228B
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Abstract
The invention discloses an orthogonal frequency division multiplex access system interference analytical method and a device thereof. The device comprises a radio frequency unit, a base band unit and a network management unit of the orthogonal frequency division multiplex access system; wherein the radio frequency unit is used for receiving a wireless signal and converting a received analog signal into a digital signal, the base band unit is used for analyzing the digital signal sent by the radio frequency unit, judging whether interference is existed or not and transmitting the interference analysis result to the network management unit; and the network management is used for sending configuration parameters to the base band unit, starting a interference analysis request and display interference analysis result. The configuration parameters include peak-to-average ratio threshold and symbol ratio threshold; wherein the symbol ratio threshold is threshold value of the ratio of the quantity of symbols with the peak-to-average ratio higher than the peak-to-average ratio threshold and the quantity of received total symbols in unit time, and interference is existed if symbol ratio is higher than the symbol ratio threshold.
Description
Technical field
The present invention relates to digital communicating field, particularly relate to a kind of method and apparatus that carries out interference analysis in OFDM (OrthogonalFrequency Division Multiple Access, OFDMA) system.
Background technology
In the wireless signal receiving in OFDMA system, except our needed terminal signaling, may also include the signal of other information source, if the signal of these information sources drops in the channel width frequency range at OFDMA system place, and reach certain intensity, just become interference.Interference meeting brings certain hydraulic performance decline to OFDMA system, such as causing the downloading rate of uploading of some access user, meeting declines, and unstable properties etc.During serious interference, even there is the situations such as terminal cannot access.
Generally, check that whether OFDMA system frequency range used exists the way of interference is to utilize frequency spectrograph to scan this frequency range, checks the variation of its frequency spectrum.Yet prices are rather stiff for a frequency spectrograph, and the distribution of base station disperses again remotely relatively, and carrying frequency spectrograph, to observe frequency spectrum very inconvenient.The OFDMA system of introducing by the present invention realizes the method for interference analysis, utilizes the hardware configuration of OFDMA system self, in conjunction with software, just can easily realize interference analysis, determines whether to exist to disturb.This will greatly save and reach the needed man power and material's cost of this purpose in the past.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of OFDMA system interference analytical method and device are provided, the radio frequency unit that utilizes OFDMA system self, Base Band Unit and network management unit, in conjunction with software, carry out interference analysis, determine whether to exist the position of disturbing and disturbing.
The present invention is by the following technical solutions:
The inventive method is utilized the radio frequency unit of OFDMA system self, and Base Band Unit and network management unit, realize interference analysis.Described OFDMA system comprises radio frequency unit, Base Band Unit and network management unit, and wherein, described radio frequency unit is used for the reception of wireless signal, and the analog signal receiving is converted into digital signal, and the inventive method comprises the following steps:
Step 1, sends to described Base Band Unit by described network management unit by configuration parameter and startup interference analysis request;
Step 2, described Base Band Unit receives that after configuration parameter and startup interference analysis request, the digital signal that described radio frequency unit is sended over is analyzed, and judges whether to exist to disturb;
Step 3, in the situation that there is interference, described Base Band Unit sends to described network management unit to show interference analysis result.
Further, network management unit shows interference analysis result in list mode.
Further, described configuration parameter comprises peak-to-average force ratio threshold value and symbol ratio thresholding; Wherein, in a symbol time, the peak power of subcarrier and the ratio of average power are peak-to-average force ratio, and peak-to-average force ratio threshold values is the threshold values of the described peak-to-average force ratio setting in advance; Symbol ratio refers in the unit interval for interference analysis, and in one second, peak-to-average force ratio surpasses the symbol numbers of peak-to-average force ratio threshold value and the ratio of the total symbol numbers receiving, and then symbol ratio thresholding is the threshold value of default symbol ratio.
Further, described in, judge whether to exist to disturb and comprise:
Within the unit interval, if symbol ratio surpasses described symbol ratio thresholding, think to exist and disturb.
Again further, described interference analysis result comprises symbol ratio, peak mean value and peak variance; Wherein, described peak mean value is in the unit interval, peak-to-average force ratio surpasses the mean value of the one-dimension array that the peak of each symbol of described peak-to-average force ratio threshold values forms, described peak variance is in the unit interval, and peak-to-average force ratio surpasses the variance of the one-dimension array that the peak of each symbol of described peak-to-average force ratio threshold values forms.
The inventive method can further include:
Step 4, when needs finish interference analysis flow process, network management unit sends and to stop interference analysis request to Base Band Unit; Base Band Unit receives that this stops, after request, stopping data collection, and responds and stop request to network management unit, and network management unit is received after response, stops receiving data.
For convenient and swift frequency spectrum situation of checking OFDMA system frequency range used, determine whether to exist and disturb, the invention provides a kind of OFDMA system interference analytical equipment, described OFDMA system comprises radio frequency unit, Base Band Unit and network management unit, wherein radio frequency unit is used for the reception of wireless signal, and the analog signal receiving is converted into digital signal.
OFDMA system interference analytical equipment of the present invention comprises described radio frequency unit, Base Band Unit and network management unit;
Wherein, described Base Band Unit is also analyzed for the digital signal that described radio frequency unit is sended over, and judges whether to exist to disturb, and interference analysis result is passed to described network management unit;
Described network management unit is also for sending configuration parameter to described Base Band Unit and starting interference analysis request, and shows interference analysis result.
Further, network management unit shows interference analysis result in list mode.
Further, described network management unit is also for sending and stop interference analysis request to described Base Band Unit.
Beneficial effect: adopt device and method of the present invention, compared with prior art, have the following advantages:
1) at hardware aspect, only need to utilize the existing radio frequency unit of system, Base Band Unit and network management unit to carry out interference analysis, substantially do not need to increase extra hardware cost;
2) judge whether to exist interference no longer to need to carry heavy frequency spectrograph, greatly saved manpower and materials.
Accompanying drawing explanation
Fig. 1 is the interference analysis device structural representation of embodiment of the present invention;
Fig. 2 is the interference analysis schematic flow sheet of embodiment of the present invention.
Embodiment
In order to make, object of the present invention, technical scheme and advantage are more clear to be understood, below in conjunction with drawings and Examples, the realization of technical scheme is described in further detail.But the embodiment is here only for explaining the present invention, but do not limit the present invention.
Referring to Fig. 1, is OFDMA system interference analytical equipment structural representation of the present invention.OFDMA system interference analytical equipment of the present invention comprises: radio frequency unit, Base Band Unit and network management unit.
Radio frequency unit, is the radio frequency unit in OFDMA system, for receiving wireless signal, and the analog signal receiving is converted into digital signal.
Base Band Unit, is the Base Band Unit in OFDMA system, process and analyze, and the result of the configuration parameter sending according to network management unit and calculating judges for the digital signal that radio frequency unit is sended over, and determines whether to exist to disturb.If existed, disturb, interference analysis result is reported to network management unit.
Network management unit, is the network management unit in OFDMA system, for configuration parameter, sends and starts interference analysis request and stop interference analysis request and show interference analysis result.When interference analysis result that As-received tape cell sends over, in list mode, show.
Referring to Fig. 2, is interference analysis schematic flow sheet of the present invention.This Figure illustrates the process of interference analysis, this process is specific as follows:
Step 1: from the backstage configuration parameter of network management unit, configuration parameter comprises two: peak-to-average force ratio threshold value P, symbol ratio thresholding R, then starts interference analysis request command, sends interference analysis request to Base Band Unit.
Wherein, in a symbol time, the peak power of subcarrier and the ratio of average power are peak-to-average force ratio, and peak-to-average force ratio threshold values is the threshold values of the peak-to-average force ratio setting in advance, and unit is dB, is made as 10dB in the embodiment of the present invention.Symbol ratio referred in the unit interval for interference analysis, the embodiment of the present invention is 1 second, peak-to-average force ratio surpasses the symbol numbers of peak-to-average force ratio threshold value and the ratio of the total symbol numbers receiving, then symbol ratio thresholding is for what preset, and the peak-to-average force ratio occurring in the unit interval reaches the symbol numbers of peak-to-average force ratio threshold value and the percentage threshold value of the total number of symbol receiving.In the embodiment of the present invention, symbol ratio thresholding is taken as 20%.Within the unit interval, if symbol ratio surpasses symbol ratio thresholding, think to exist and disturb.
Step 2: Base Band Unit is received configuration parameter and started after interference analysis request, returns to a startup successfully reply to network management unit.
Step 3: Base Band Unit receives the time domain data sending over from radio frequency unit, then does fast fourier transform (Fast Fourier Transform, FFT), obtains frequency domain data:
Y (k) represents the frequency domain data receiving, and k represents subcarrier, and the power of each subcarrier can be represented by following formula:
P(k)＝Y(k)×Y
*(k)
Step 4: Base Band Unit calculate plural mould that each subcarrier is corresponding square, obtain the power of each subcarrier.The average power of all subcarriers of statistics in a symbol time, and by contrast, determine peak power, then by peak power divided by average power, obtain peak-to-average force ratio.If peak-to-average force ratio surpasses the peak-to-average force ratio threshold value P in step 1, record the position (be peak, represent by subcarrier number) of the subcarrier at peak power place in an one-dimension array.Within the time of 1 second, if peak-to-average force ratio surpasses the symbol numbers of peak-to-average force ratio threshold value P and the ratio of the total symbol numbers receiving reaches the symbol ratio thresholding R setting in step 1, calculate mean value and the variance of the peak of preserving in one-dimension array.
Step 5: Base Band Unit reports interference analysis result to network management unit.Interference analysis result comprises three parameters: concrete symbol ratio r, peak mean value and peak variance.
Step 6: network management unit receives after data, shows interference analysis result in list mode.According to symbol ratio r, peak mean value and the peak variance in interference analysis result, just can determine the frequency of disturbing place.
Wherein, peak mean value is in 1 second, peak-to-average force ratio surpasses the mean value of the one-dimension array that the peak of each symbol of peak-to-average force ratio threshold values P forms, and peak variance is in 1 second, and peak-to-average force ratio surpasses the variance of the one-dimension array that the peak of each symbol of peak-to-average force ratio threshold values P forms.
Step 7: when needs stop interference analysis, network management unit sends and stops disturbing request to Base Band Unit.
Step 8: Base Band Unit is received and stopped, after request, stopping data collection.
Step 9: Base Band Unit is responded and stopped request to network management unit.
Step 10: network management unit is received after response, stops receiving data.
Be more than preferred embodiment of the present invention, be not limited to the present invention, all any modifications of doing within the present invention's spirit and principle, are equal to replacement and improvement etc., all should be included in protection scope of the present invention.
Claims (7)
1. an orthogonal frequency division multiple access system interference analysis method, described system comprises radio frequency unit, Base Band Unit and network management unit, wherein, described radio frequency unit is for the reception of wireless signal, and the analog signal receiving is converted into digital signal, and it is characterized in that, comprise the steps:
Step 1, sends to described Base Band Unit by described network management unit by configuration parameter and startup interference analysis request; Described configuration parameter comprises: peak-to-average force ratio threshold value and symbol ratio thresholding; Wherein, in a symbol time, the peak power of subcarrier and the ratio of average power are peak-to-average force ratio, and peak-to-average force ratio threshold values is the threshold values of the described peak-to-average force ratio setting in advance; Symbol ratio refers in the unit interval for interference analysis, and peak-to-average force ratio surpasses the symbol numbers of peak-to-average force ratio threshold value and the ratio of the total symbol numbers receiving, and then symbol ratio thresholding is the threshold value of default symbol ratio;
Step 2, described Base Band Unit receives that after configuration parameter and startup interference analysis request, the digital signal that described radio frequency unit is sended over is analyzed, judge whether to exist and disturb, within the unit interval, symbol ratio surpasses described symbol ratio thresholding, judges to exist and disturbs;
Step 3, in the situation that there is interference, described Base Band Unit sends to described network management unit to show interference analysis result.
2. orthogonal frequency division multiple access system interference analysis method according to claim 1, is characterized in that,
Described network management unit shows interference analysis result in list mode.
3. orthogonal frequency division multiple access system interference analysis method according to claim 1, is characterized in that:
Described interference analysis result comprises symbol ratio, peak mean value and peak variance;
Wherein, described peak mean value is in the unit interval, and peak-to-average force ratio surpasses the mean value of the one-dimension array that the peak of each symbol of described peak-to-average force ratio threshold values forms;
Described peak variance is in the unit interval, and peak-to-average force ratio surpasses the variance of the one-dimension array that the peak of each symbol of described peak-to-average force ratio threshold values forms.
4. according to the orthogonal frequency division multiple access system interference analysis method described in any one in claim 1 to 2, it is characterized in that, described method further comprises:
Step 4, when needs finish interference analysis flow process, network management unit sends and stops interference analysis request to Base Band Unit; Base Band Unit receives that this stops, after interference analysis request, stopping data collection, and responds and stop request to network management unit, and network management unit is received after response, stops receiving data.
5. an orthogonal frequency division multiple access system interference analysis device, described orthogonal frequency division multiple access system interference analysis device comprises radio frequency unit, Base Band Unit and network management unit, described radio frequency unit is used for the reception of wireless signal, and the analog signal receiving is converted into digital signal; It is characterized in that:
Described Base Band Unit is also analyzed for the digital signal that described radio frequency unit is sended over, judge whether to exist and disturb, within the unit interval, symbol ratio surpasses the symbol ratio thresholding of configuration, judge to exist and disturb, and interference analysis result is passed to described network management unit;
Described network management unit is also for sending configuration parameter to described Base Band Unit and starting interference analysis request, and shows interference analysis result; Wherein, described configuration parameter comprises: peak-to-average force ratio threshold value and symbol ratio thresholding; Wherein, in a symbol time, the peak power of subcarrier and the ratio of average power are peak-to-average force ratio, and peak-to-average force ratio threshold values is the threshold values of the described peak-to-average force ratio setting in advance; Symbol ratio refers in the unit interval for interference analysis, and peak-to-average force ratio surpasses the symbol numbers of peak-to-average force ratio threshold value and the ratio of the total symbol numbers receiving, and then symbol ratio thresholding is the threshold value of default symbol ratio.
6. orthogonal frequency division multiple access system interference analysis device according to claim 5, is characterized in that:
Described network management unit shows interference analysis result in list mode.
7. according to the orthogonal frequency division multiple access system interference analysis device described in claim 5 or 6, it is characterized in that:
Described network management unit is also for sending and stop interference analysis request to described Base Band Unit.
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| CN107659954A (en) * | 2016-07-25 | 2018-02-02 | 中兴通讯股份有限公司 | A kind of terminal communication management method and device, mobile terminal |
| CN106303344B (en) * | 2016-08-26 | 2020-04-07 | 高拓讯达（北京）科技有限公司 | Method and device for processing interference signal based on digital television receiver |
| CN112994919B (en) * | 2019-12-17 | 2024-01-26 | 中兴通讯股份有限公司 | Communication parameter configuration method, device, equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006102793A1 (en) * | 2005-03-29 | 2006-10-05 | Zte Corporation | A method of detecting illegal occupancying frequency signal in radio communication network |
| WO2007003298A1 (en) * | 2005-06-30 | 2007-01-11 | Stmicroelectronics N.V. | Method and apparatus for reducing the interferences between a wide band device and a narrow band device interfering with said wide band device |
| CN101478656A (en) * | 2008-12-15 | 2009-07-08 | 北京创毅视讯科技有限公司 | Co-channel interference filtering method and apparatus therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006102793A1 (en) * | 2005-03-29 | 2006-10-05 | Zte Corporation | A method of detecting illegal occupancying frequency signal in radio communication network |
| WO2007003298A1 (en) * | 2005-06-30 | 2007-01-11 | Stmicroelectronics N.V. | Method and apparatus for reducing the interferences between a wide band device and a narrow band device interfering with said wide band device |
| CN101478656A (en) * | 2008-12-15 | 2009-07-08 | 北京创毅视讯科技有限公司 | Co-channel interference filtering method and apparatus therefor |
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Effective date of registration: 20171201 Address after: 065000 Langfang City, Hebei province Guangyang District Xinhua Road China 3 Building 1 unit 101 room Patentee after: Guo Haiyan Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
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Inventor after: Guo Haiyan Inventor before: Xiao Guangjin |
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Granted publication date: 20140319 Termination date: 20180713 |