CN102638800A - Method and device for eliminating same-frequency interference - Google Patents
Method and device for eliminating same-frequency interference Download PDFInfo
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- CN102638800A CN102638800A CN2012100721133A CN201210072113A CN102638800A CN 102638800 A CN102638800 A CN 102638800A CN 2012100721133 A CN2012100721133 A CN 2012100721133A CN 201210072113 A CN201210072113 A CN 201210072113A CN 102638800 A CN102638800 A CN 102638800A
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Abstract
The invention discloses a method and a device for eliminating the same-frequency interference. The method for eliminating the same-frequency interference includes steps of acquiring interference signals of a cell according to neighborhood cell receipt signals which are the receipt signals accessed into the cell from the neighborhood cell; eliminating influence of interference sources onto the receipt signals of the cell according to the interference signals. By the aid of the method and the device for eliminating the same-frequency interference, the same-frequency interference signals of different networks are eliminated effectively to enhance business experience under conditions of unknown quantity of the interference sources and limited sending antennas.
Description
Technical field
The present invention relates to communication technical field, more particularly, relate to a kind of method and apparatus that disturbs with frequently of between neighbor cell, eliminating.
Background technology
Along with development of wireless communication devices, wireless communication system is also increasing the demand of radio spectrum resources.Wireless frequency spectrum is the precious resources of human shared, and it does not have boundary property.Bring many whiles easily at it to the mankind, also have some puzzlements undoubtedly.Such as, in the practical application of wireless communication system, the influence that subscriber signal can be interfered comprises interference and the interference of minizone in the sub-district.With disturbing frequently is one of interference source.Carrier frequency with frequently disturbing the carrier frequency that refers to unwanted signal and useful signal is identical, and the interference that the receiver that receives with the frequency useful signal is caused.Between two networks in a sub-district, can avoid with disturbing frequently through the resource of programming wireless frequency spectrum reasonably.
But, at two adjacent cell boarder places usually because distance effect too near or atmospheric duct makes the network between two sub-districts produce with disturbing frequently.
At present, existing method with the frequency interference eliminated mainly is the method for beam shaping.Adopt existing beam-forming method to require relatively strictness for the number of transmit antennas purpose of base station, the number of the transmitting antenna of base station must just can eliminate interference greater than the number of interference source.And disturb for the same frequency between two different operators networks, the number of interference source is unknown often, and this just makes become difficulty more of interference eliminated.
Summary of the invention
The present invention aims to provide a kind of method and apparatus that disturbs with frequently of between neighbor cell, eliminating.
One aspect of the present invention provides a kind of method of disturbing with frequently of eliminating, and this method may further comprise the steps: the interference signal that obtains this sub-district according to the reception signal of neighbor cell; Eliminate the influence of interference source according to the interference signal of this sub-district to the reception signal of this sub-district.
A kind of device that disturbs with frequently of eliminating is provided in another aspect of this invention, and this device comprises acquiring unit and operating unit, and wherein: said acquiring unit is configured to obtain according to the reception signal of neighbor cell the interference signal of this sub-district; Operating unit is configured to eliminate the influence of interference source to the reception signal of this sub-district according to the interference signal of this sub-district.
Can find out, adopt the method and apparatus of the embodiment of the invention, even unknown at the interference source number, under the transmitting antenna number condition of limited, the same frequency that also can eliminate effectively between two different operators networks disturbs.Can promote the efficient of eliminating with the processing of disturbing frequently thus greatly.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 shows the main-process stream block diagram of eliminating in the embodiment of the invention with the method for disturbing frequently;
Fig. 2 shows according to an embodiment of the invention the flow chart of processing that obtains the interference signal of this sub-district through the reception signal of handling neighbor cell;
Fig. 3 shows the flow chart that obtains the processing of minizone transfer function in the embodiment of the invention;
Fig. 4 a shows the application scenarios of one embodiment of the invention;
Fig. 4 b has specifically illustrated the allocation plan of reception signal how to introduce neighbor cell;
Fig. 5 shows the structure chart of the same device that disturbs frequently of elimination in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention will be carried out clear, intactly description; Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
A kind of method of disturbing with frequently of eliminating is provided in the embodiment of the invention, and as shown in Figure 1, this method comprises:
Step S110: obtain the interference signal of this sub-district according to the reception signal of neighbor cell, the reception signal of this neighbor cell is a reception signal of introducing this this sub-district from the neighbor cell of this this sub-district;
Step S120: eliminate the influence of interference source to the reception signal of this sub-district according to the interference signal of this sub-district.
The same frequency of eliminating the minizone through above this mode disturbs, and on the one hand, does not need definitely to learn the number of interference source, has avoided the trouble in the practical operation; On the other hand, also do not require for the number of transmitting antenna, that is to say, the same frequency that under transmitting antenna number condition of limited, also can eliminate the minizone effectively disturbs.Can promote the efficient of eliminating with the processing of disturbing frequently thus greatly.
Fig. 2 shows according to an embodiment of the invention the flow chart of processing that reception signal according to neighbor cell obtains the interference signal of this sub-district.Make concrete description in detail below in conjunction with Fig. 2:
The reception signal of S210, introducing neighbor cell.
Specifically, after the antenna of a sub-district received the full range signal, this signal for example can be successively through being divided into two paths of signals behind filter and the low noise amplifier, and one road signal is handled through the baseband processing unit BBU that the intermediate frequency device enters into said sub-district; Another road signal then can be drawn.For example, said another road signal can lead to another sub-district through accessory channel, and behind process intermediate frequency device, enters into the base processing unit of another sub-district.
Thereby, in order to obtain the interference of interference source, can in this sub-district, introduce the reception signal in the neighbor cell of this sub-district to this sub-district.For example, the accessory channel that can be through this sub-district or the reference channel of other any appropriate are introduced the reception signal of neighbor cell.
For explanation in further detail, combine Fig. 4 a with a base station three sub-districts to be arranged is example at present, explains as follows:
Shown in Fig. 4 a, three sub-districts can be served in a base station, and each sub-district for example can comprise two reception antennas and two accessory channels.Wherein, the reception antenna of sub-district 1 is A1, and A2, accessory channel are RA1, RA2; The reception antenna of sub-district 2 is B1, and B2, accessory channel are RB1, RB2; The antenna of sub-district 3 is C1, and C2, accessory channel are RC1, RC2.In addition, Fig. 4 a is merely example, and the number of number of cells, reception antenna number, accessory channel is not limited thereto, and for example, number of cells also can be six.In addition, in order to make Fig. 4 a clearer, the annexation of part only has been shown in Fig. 4 a.
Fig. 4 b further shows the allocation plan of the reception signal of introducing neighbor cell.Shown in Fig. 4 b; Reception antenna A2 in the sub-district 1 (the for example antenna A2 among Fig. 4 a) receives signal; The signal that then receives can be divided into two paths of signals after the processing through the filter of sub-district 1 and linear amplifier (LNA), one road signal is handled through the IF process device and the baseband processing unit that get into this sub-district (being sub-district 1); And another road signal for example can be introduced into sub-district 3 through accessory channel RC2 via accessory channel RC2.After being incorporated into sub-district 3, this signal elder generation is through the processing of the filter and the linear amplifier of sub-district 1, and the IF process device and the baseband processing unit that can get into sub-district 3 are then handled.Thus, via the accessory channel RC2 of sub-district 3 the reception signal of sub-district 1 is incorporated in the sub-district 3.
By that analogy; The reception signal of the reception antenna in three sub-districts all can be imported into other neighbor cells in this way and handle; That is, the reception antenna of three sub-districts and accessory channel can couple together, and its connection corresponding relation can be as shown in table 1; Wherein, only show the annexation of part for making Fig. 4 a more concise and to the point:
| Reception antenna | Accessory channel |
| A1 | RB2 |
| B1 | RA2 |
| C1 | RA1 |
| A2 | RC2 |
| B2 | RC1 |
| C2 | RB1 |
Table 1: reception antenna and accessory channel annexation
In conjunction with Fig. 4 a and table 1 can, the reception signal of the antenna A1 in the sub-district 1 is introduced in (Fig. 4 a is not shown) in the sub-district 2 via the accessory channel RB2 of sub-district 2; The reception signal of antenna A2 in the sub-district 1 is introduced in (Fig. 4 a illustrates) in the sub-district 3 via the accessory channel RC2 of sub-district 3; The reception signal of antenna B1 in the sub-district 2 is introduced in (Fig. 4 a is not shown) in the sub-district 1 via the accessory channel RA2 of sub-district 1; The reception signal of antenna B2 in the sub-district 2 is introduced in (Fig. 4 a illustrates) in the sub-district 3 via the accessory channel RC1 of sub-district 3; The reception signal of antenna C1 in the sub-district 3 is introduced in (Fig. 4 a is not shown) in the sub-district 1 via the accessory channel RA1 of sub-district 1; The reception signal of antenna C2 in the sub-district 3 is introduced in (Fig. 4 a is not shown) in the sub-district 2 via the accessory channel RB1 of sub-district 2.
The reception signal of S220, neighbor cell that on the service band of this sub-district, handle to introduce is to obtain the interference signal that interference source causes in to neighbor cell in the service band of this sub-district.
Specifically; In practical application; The frequency of each sub-district can be divided into a plurality of frequency bands, and the useful signal of each sub-district only exists on a frequency band therein, and this is called service band below frequency band; That is to say the mixed signal that has useful signal and interference signal on the service band of each sub-district; What exist on other frequency bands all is interference signal, and the signal conductively-closed on other frequency bands falls, and the baseband processing unit of each sub-district is also only handled the signal on this sub-district service band.
Still be example with three sub-districts shown in the embodiment of Fig. 4 a, the frequency of three sub-districts is divided into three frequency bands separately, and the useful signal of setting sub-district 1 only exists on first frequency band, and then first frequency band is the service band of sub-district 1; The useful signal of sub-district 2 only exists on second frequency band, and then second frequency band is the service band of sub-district 2; The useful signal of sub-district 3 only exists on the 3rd frequency band, and then the 3rd frequency band is the service band of sub-district 3.The baseband processing unit of each sub-district is only handled the signal on the service band separately.
Referring to above-mentioned table 1 and Fig. 4 a and Fig. 4 b; In sub-district 1, can be incorporated in the BBU unit of sub-district 1 and handle, and handle through the BBU that accessory channel RA2 can be incorporated into the signal (being the reception signal of sub-district 2) that antenna B1 receives sub-district 2 through the signal (being the reception signal of sub-district 3) that accessory channel RA1 receives antenna C1.Because the BBU of sub-district 1 is processing signals in first frequency band only, and the signal of reception signal in first frequency band of the reception signal of sub-district 2 and sub-district 3 all only comprises the interference signal that interference source causes in sub-district 2 and sub-district 3.Thus, the processing of BBU that can be through sub-district 1 obtains the interference that interference source causes sub-district 2 and sub-district 3 in first frequency band.
Thereby, based on above processing, can obtain the interference signal that interference source causes in the neighbor cell (for example sub-district 2 and sub-district 3) to sub-district 1 in the service band of sub-district 1.
S230, the interference signal that in the service band of this sub-district, causes in to neighbor cell based on interference source and the transfer function of this sub-district and neighbor cell obtain interference source interference signal to this sub-district in the service band of this sub-district.
According to the dissemination channel characteristic, the interference signal that receives for different districts is at a phase difference that has on the amplitude on a proportionate relationship and the phase place.So the transfer function that can utilize the minizone obtains the interference signal of interference source to another sub-district according to interference source to the interference signal of one or more sub-district.Wherein, Transfer function can be the function of the variation that produces when being used to characterize same physical quantity and between two sub-districts, transmitting; That is to say, can obtain the size of this physical quantity in another sub-district according to the size of certain physical quantity in a sub-district based on transfer function.More particularly, for example, under the situation of the interference that in first frequency band, sub-district 2 is caused in the known disturbances source, can draw the interference that this interference source causes sub-district 1 in first frequency band based on the transfer function between sub-district 1 and the sub-district 2.
In an example of the present invention, can utilize a neighbor cell of this sub-district to obtain interference source and cause interference signal in this sub-district.Specifically; Interference signal that can in the service band of this sub-district, cause a said neighbor cell according to interference source and the transfer function between this sub-district and the said neighbor cell obtain interference source interference signal to this sub-district in the service band of this sub-district.
In another example of the present invention, also can utilize a plurality of neighbor cells of this sub-district to obtain interference source and cause interference signal, with further raising accuracy in this sub-district.Specifically; At first; Interference signal that can in the service band of this sub-district, cause each neighbor cell in said a plurality of neighbor cells according to interference source and the transfer function between this sub-district and each neighbor cell calculate interference source interference signal to this sub-district in the service band of this sub-district based on each neighbor cell; Then, a plurality of interference signals that calculate are carried out weighted (for example, can rule of thumb be worth give different weighted values to each result of calculation) to calculate interference source interference signal to this sub-district in the service band of this sub-district.As a simple example, under the situation of utilizing two neighbor cells, can directly the interference signal that calculates based on said two neighbor cells be averaged processing (that is, the weight of each neighbor cell all is configured to 0.5).In this way, can further improve the precision of calculating.
In addition, transfer function is the intrinsic physical attribute that characterizes between two sub-districts.In one embodiment of the invention, can rule of thumb be worth to come the transfer function that directly obtains between two sub-districts.In another embodiment of the present invention, also can calculate two transfer functions between the sub-district.
Fig. 3 shows the processing of the transfer function that obtains the minizone according to an embodiment of the invention.As shown in Figure 3, the transfer function between the sub-district can obtain through following steps:
S310, the reception signal of the reception signal of this sub-district and neighbor cell is introduced another sub-district handle.
Wherein, can the reception signal of this sub-district and the reception signal of neighbor cell be incorporated into another sub-district via corresponding accessory channel, repeat no more at this.In addition, said another sub-district can be the sub-district adjacent with this sub-district, sub-district that also can other any appropriate.
S320, utilize the baseband processing unit of said another sub-district to handle the reception signal of this sub-district and the reception signal of neighbor cell.
Specifically, on the service band of this another sub-district, handle the reception signal of this sub-district reception signal introduced from this sub-district and the said neighbor cell of introducing from said neighbor cell respectively based on the BBU of said another sub-district.
S330, calculate said transfer function based on the reception signal of this sub-district after handling and the reception signal of neighbor cell.
Wherein, Owing to utilize the baseband processing unit of another sub-district to handle the reception signal of this sub-district and the reception signal of neighbor cell, the reception signal of the neighbor cell after the reception signal of this sub-district after handling and the processing is respectively: the interference signal that interference signal that interference source causes this sub-district in the service band of said another sub-district and interference source cause neighbor cell in the service band of said another sub-district.
Thus, can be through the different value of same physical quantity (being the interference signal that interference source causes in the service band of another sub-district) in the neighbor cell of this sub-district and this sub-district, calculate the transfer function between the neighbor cell of this sub-district and this sub-district.
As a simple example, can come calculation of transfer function based on following formula:
T＝A/B
Wherein, T representes transfer function, and A, B represent the interference signal that interference source causes this sub-district and neighbor cell respectively in the service band of said another sub-district.
S240, eliminate the influence of interference source to the reception signal of this sub-district according to the interference signal of this sub-district
Specifically; In this sub-district service band; Receive in the signal and comprised useful signal and interference signal, thereby in a simple example, can from said reception signal, deduct the interference signal that the interference source that obtains through above method causes this sub-district; Just can obtain the useful signal of this sub-district, eliminate the influence of interference source.
Similar with the method for disturbing frequently with above-mentioned elimination, the embodiment of the invention also provides corresponding device thereof.
Fig. 5 shows the device 400 that the elimination in the embodiment of the invention is disturbed with frequency.
As shown in Figure 5, above-mentioned elimination can comprise acquiring unit 410 and operating unit 420 with the device that disturbs frequently.
Specifically, acquiring unit 410 can obtain the interference signal of this sub-district according to the reception signal of neighbor cell; And operating unit 420 can be eliminated the influence of interference source to the reception signal of this sub-district according to the interference signal of this sub-district.
Device according to the elimination of the embodiment of the invention is disturbed together frequently on the one hand, does not need definitely to learn the number of interference source, has avoided the trouble in the practical operation; On the other hand, also do not require for the number of transmitting antenna, that is to say, the same frequency that under transmitting antenna number condition of limited, also can eliminate the minizone effectively with the device that disturbs frequently according to the elimination of the embodiment of the invention disturbs.Can promote the efficient of eliminating with the processing of disturbing frequently thus greatly.
As stated, acquiring unit can obtain the interference signal of this sub-district according to the reception signal of neighbor cell.
In a specific embodiment of the present invention, acquiring unit also comprises transfer function calculating unit.This transfer function is calculated the unit can realize following processing: the reception signal of introducing neighbor cell; On the service band of this sub-district, handle the reception signal of the neighbor cell of introducing, to obtain the interference signal that interference source causes neighbor cell in the service band of this sub-district; Interference signal that in the service band of this sub-district, neighbor cell is caused based on interference source and the transfer function between this sub-district and the neighbor cell obtain interference source interference signal to this sub-district in the service band of this sub-district.
More particularly, acquiring unit can be introduced the reception signal of neighbor cell through the accessory channel of this sub-district.In addition, when handling the reception signal of the neighbor cell of introducing, acquiring unit can use the baseband processing unit BBU of this sub-district on the service band of this sub-district, to handle the reception signal of the neighbor cell of introducing.In addition, when calculation of transfer function, acquiring unit can be handled the reception signal of this sub-district and another sub-district of reception signal introducing of neighbor cell; Utilize the BBU unit of another sub-district to handle the reception signal of this sub-district and the reception signal of neighbor cell; Come calculation of transfer function based on the reception signal of this sub-district after handling and the reception signal of neighbor cell.
Said apparatus according to the embodiment of the invention is corresponding with method technically, can no longer give unnecessary details so that specification keeps succinct at this referring to the detailed description of method about the ins and outs of device.
It should be appreciated by those skilled in the art that the function that is divided into of apparatus module is divided in the embodiment of the invention, actual concrete structure can be the fractionation or the merging of above-mentioned functions module.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The scheme of the content record of claim also is the protection range of the embodiment of the invention.
One of ordinary skill in the art will appreciate that all or part of processing in the foregoing description method is to instruct relevant hardware to accomplish through program, described program can be stored in a kind of computer-readable recording medium.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an elimination is characterized in that with the method for disturbing frequently, may further comprise the steps:
According to the interference signal that obtains this sub-district at the reception signal of neighbor cell, the reception signal of said neighbor cell is a reception signal of introducing said this sub-district from said neighbor cell;
Eliminate the influence of interference source according to the interference signal of said this sub-district to the reception signal of said this sub-district.
2. elimination according to claim 1 is characterized in that with the method for frequently disturbing, and saidly obtains the processing of the interference signal of this sub-district according to the reception signal of neighbor cell, comprising:
Introduce the reception signal of said neighbor cell;
On the service band of said this sub-district, handle the reception signal of the said neighbor cell of introducing, to obtain the interference signal that said interference source causes said neighbor cell in the service band of said this sub-district;
Interference signal that in the service band of said this sub-district, said neighbor cell is caused based on said interference source and the transfer function between said this sub-district and the said neighbor cell obtain said interference source interference signal to said this sub-district in the service band of said this sub-district.
3. elimination according to claim 2 is characterized in that with the method for disturbing frequently, introduces the reception signal of said neighbor cell through the accessory channel of said this sub-district.
4. elimination according to claim 2 is with the method for disturbing frequently; It is characterized in that said reception Signal Processing at the neighbor cell that processing on the service band of this sub-district is introduced comprises: the reception signal of handling the said neighbor cell of introducing on the service band of baseband processing unit BBU in said this sub-district of said this sub-district of use.
5. elimination according to claim 2 is characterized in that with the method for disturbing frequently, obtains said transfer function through following processing:
The reception signal of said this sub-district and another sub-district of reception signal introducing of said neighbor cell are handled;
Utilize the BBU of said another sub-district to handle the reception signal of said this sub-district and the reception signal of said neighbor cell;
Based on the reception signal of said this sub-district after handling and the said transfer function of reception calculated signals of said neighbor cell.
6. an elimination is characterized in that with the device that disturbs frequently said device comprises:
Acquiring unit is configured to obtain according to the reception signal of neighbor cell the interference signal of this sub-district, and the reception signal of said neighbor cell is a reception signal of introducing said this sub-district from said neighbor cell;
Operating unit is configured to eliminate the influence of interference source to the reception signal of said this sub-district according to the interference signal of said this sub-district.
7. elimination according to claim 6 is characterized in that with the device that disturbs frequently said acquiring unit also comprises the transfer function computation subunit, and said transfer function computation subunit is configured to: the reception signal of introducing said neighbor cell; On the service band of said this sub-district, handle the reception signal of the neighbor cell of said introducing, to obtain the interference signal that said interference source causes neighbor cell in the service band of this sub-district; Interference signal that in the service band of said this sub-district, said neighbor cell is caused based on said interference source and the transfer function between said this sub-district and the neighbor cell obtain said interference source interference signal to said this sub-district in the service band of said this sub-district.
8. elimination according to claim 6 is characterized in that said acquiring unit also is configured to: the reception signal of introducing said neighbor cell through the accessory channel of said this sub-district with the device that disturbs frequently.
9. elimination according to claim 6 is with the device that disturbs frequently; It is characterized in that said acquiring unit also is configured to: the baseband processing unit BBU of said this sub-district of use handles the reception signal of the said neighbor cell of introducing on the service band of said this sub-district.
10. elimination according to claim 6 is characterized in that with the device that disturbs frequently said acquiring unit also is configured to: the reception signal of said this sub-district and another sub-district of reception signal introducing of neighbor cell are handled; Utilize the BBU of said another sub-district to handle the reception signal of said this sub-district and the reception signal of neighbor cell; Calculate said transfer function based on the reception signal of said this sub-district after handling and the reception signal of neighbor cell.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014036836A1 (en) * | 2012-09-05 | 2014-03-13 | 华为技术有限公司 | Method and device for eliminating interference signals |
| WO2018090206A1 (en) * | 2016-11-15 | 2018-05-24 | 华为技术有限公司 | Interference suppression method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6188903B1 (en) * | 1995-09-25 | 2001-02-13 | Cirrus Logic, Inc. | Method and apparatus for frequency reuse in cellular communication systems |
| CN1874189A (en) * | 2006-06-29 | 2006-12-06 | 凯明信息科技股份有限公司 | Method and device for concurrent eliminating same frequency interference in TDS-CDMA |
| CN102325336A (en) * | 2011-09-09 | 2012-01-18 | 大唐移动通信设备有限公司 | Common-frequency neighbor cell interference suppression performance test system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188903B1 (en) * | 1995-09-25 | 2001-02-13 | Cirrus Logic, Inc. | Method and apparatus for frequency reuse in cellular communication systems |
| CN1874189A (en) * | 2006-06-29 | 2006-12-06 | 凯明信息科技股份有限公司 | Method and device for concurrent eliminating same frequency interference in TDS-CDMA |
| CN102325336A (en) * | 2011-09-09 | 2012-01-18 | 大唐移动通信设备有限公司 | Common-frequency neighbor cell interference suppression performance test system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014036836A1 (en) * | 2012-09-05 | 2014-03-13 | 华为技术有限公司 | Method and device for eliminating interference signals |
| CN103686752A (en) * | 2012-09-05 | 2014-03-26 | 华为技术有限公司 | Method and device for eliminating interference signals |
| WO2018090206A1 (en) * | 2016-11-15 | 2018-05-24 | 华为技术有限公司 | Interference suppression method and apparatus |
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| CN102638800B (en) | 2014-09-17 |
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