CN107294636B - Detection method and device for eliminating co-channel interference - Google Patents
Detection method and device for eliminating co-channel interference Download PDFInfo
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Abstract
The invention discloses a detection method and a device for eliminating co-channel interference, wherein the method comprises the steps of calculating the total power of each symbol of an uplink subframe of a target base station, determining an interfered symbol according to the total power of each symbol and a preset threshold value, and carrying out interference suppression processing on data demodulated by the interfered symbol; by detecting and judging each symbol of the uplink subframe of the target base station, if the symbol is interfered, interference suppression processing is carried out, so that the problem that the overall demodulation performance of the uplink subframe is influenced by the interfered symbol is effectively solved, meanwhile, the interfered symbol is determined by calculating the total power and the threshold value of the symbol, the accurate judgment and determination can be ensured when the interfered symbol is determined, the interference suppression processing is carried out on the demodulated data, the problem that the uplink of the target base station can be interfered by the same frequency of the downlink signal of the remote base station is further solved, and the demodulation performance and the uplink throughput of the target base station are also improved.
Description
Technical Field
The invention relates to the technical field of wireless network communication, in particular to a detection method and a detection device for eliminating same frequency interference.
Background
For a TDD (time division duplex) system, the base stations are required to maintain strict time synchronization, and a GPS synchronization mode is generally adopted to ensure time timing synchronization between the base stations. Because the Caoyong same-frequency coverage mode is adopted, mutual interference between adjacent cells exists in the natural world. Meanwhile, uplink and downlink transmission of the TDD system share frequency, so in the TDD system, besides the mutual interference between the conventional adjacent cells, there is also a case where a downlink signal of the remote base station interferes with an uplink signal of the target cell.
Long-range co-channel interference in TDD systems occurs between base stations that are far apart. With the increase of the propagation distance, after the signal of the far-end transmission source reaches the target base station with the same frequency at the near-end through the propagation delay, the signal may enter other transmission time slots of the target base station, thereby affecting the normal operation of the near-end target system, as shown in fig. 1. Because the transmission power of the base station is much larger than that of the terminal, the far-end co-channel interference mainly appears as the interference of the downlink signal of the far-end cell with the uplink signal reception of the near-end target base station.
Based on the current TD-LTE (long term evolution) system, when the DwPTS (remote base station downlink timeslot) of the special subframe is delayed to the U (uplink) subframe, this is that the downlink signal of the remote base station will cause strong interference to the target base station uplink U subframe, thereby causing the degradation of the uplink demodulation performance of the target base station. In the existing solution, there is no other better way to reduce the cross slot interference of uplink and downlink except by increasing the GP (guard interval) between uplink and downlink or adjusting the tilt angle of the communication antenna. And the above measures cannot completely eliminate the interference hidden trouble.
Disclosure of Invention
The invention provides a detection method and a detection device for eliminating co-channel interference, which are used for solving the technical problem that the uplink demodulation performance of a target base station is reduced because a downlink signal of a remote base station in a TDD system interferes with the uplink signal reception of a near-end target base station.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a detection method for eliminating co-channel interference, which comprises the following steps:
calculating the total power of each symbol of an uplink subframe of a target base station;
determining interfered symbols according to the total power of each symbol and a preset threshold value;
and carrying out interference suppression processing on the data after the interfered symbol demodulation.
In another embodiment of the present invention, the threshold value is selectively set according to demodulation performance of each symbol when the target base station receives uplink.
In another embodiment of the present invention, the interference suppression processing on the data after the interfered symbol demodulation specifically includes:
directly carrying out zero clearing processing on the demodulated data corresponding to the interfered symbol;
or, performing weighting processing on the demodulated data corresponding to the interfered symbol, where the weighting processing is to multiply the interfered symbol by an infinitesimal value.
In another embodiment of the present invention, determining the interfered symbol according to the total power of each symbol and a preset threshold specifically includes:
selecting the total power of a first pilot frequency symbol and the total power of all data symbols before the first pilot frequency symbol according to the total power of each symbol of an uplink subframe;
calculating the power difference between each data symbol and the pilot frequency symbol;
and taking the data symbols with the power difference larger than the threshold value as interfered symbols.
In another embodiment of the present invention, if there are a plurality of data symbols, a power difference between a last data symbol of the data symbols and a first pilot symbol is calculated;
comparing the power difference to the threshold value;
if the power difference is larger than the threshold value, all data symbols before the first pilot frequency symbol are determined to be interfered symbols;
and if the power difference is smaller than the threshold value, sequentially calculating the power difference between other data symbols and the pilot symbols and comparing the power difference with the threshold value.
In order to solve the above technical problem, the present invention further provides a detection apparatus for eliminating co-channel interference, including:
the calculation module is used for calculating the total power of each symbol of an uplink subframe of the target base station;
the judging module is used for determining the interfered symbol according to the total power of each symbol and a preset threshold value;
and the processing module is used for carrying out zero clearing processing on the data after the interfered symbol is demodulated.
In another embodiment of the present invention, the base station further includes a setting module, configured to select and set the threshold value according to demodulation performance of each symbol when the target base station receives uplink.
In another embodiment of the present invention, the processing module is specifically configured to directly perform zero clearing processing on the demodulated data corresponding to the interfered symbol;
or, performing weighting processing on the demodulated data corresponding to the interfered symbol, where the weighting processing is to multiply the interfered symbol by an infinitesimal value.
In another embodiment of the present invention, the decision module includes a selection submodule, a calculation submodule, and a decision submodule;
the selection submodule selects the total power of the first pilot frequency symbol and the total power of all data symbols before the first pilot frequency symbol according to the total power of each symbol of the uplink subframe;
the calculation submodule calculates the power difference between each data symbol and the pilot frequency symbol;
and the judging sub-module takes the data symbols with the power difference larger than the threshold value as interfered symbols.
In another embodiment of the present invention, the decision module further comprises a comparison sub-module;
if the number of the data symbols is multiple, the calculation submodule calculates the power difference between the last data symbol in the data symbols and the first pilot frequency symbol;
the comparison submodule compares the power difference with the threshold value;
if the power difference is larger than the threshold value, the judgment sub-module determines that all data symbols before the first pilot frequency symbol are interfered symbols;
if the power difference is smaller than the threshold value, the calculation sub-module calculates the power difference between other data symbols and the pilot symbols in sequence and compares the power difference with the threshold value.
The invention has the beneficial effects that:
the invention provides a detection method and a device for eliminating co-channel interference, which judge the interfered symbol in the uplink subframe symbol of a target base station by detection and carry out zero clearing processing on the data demodulated by the interfered symbol, and because the interference suppression processing is carried out on the detected interfered partial symbol, the effective and targeted rapid processing of the interfered symbol is realized, the influence on the whole subframe symbol is reduced, and the uplink demodulation performance of the target base station is improved; the method comprises the steps of firstly calculating the total power of each symbol of an uplink subframe of a target base station, then determining the interfered symbol according to the total power of each symbol and a preset threshold value, carrying out interference suppression processing on the symbol, judging the interfered symbol according to the total power of each symbol of the subframe, demodulating and then carrying out interference suppression processing.
Further, after the interfered symbol is judged, the interfered symbol is subjected to weighted preprocessing, specifically, data demodulated by the interfered symbol is directly subjected to zero clearing processing, or the data demodulated by the interfered symbol is multiplied by an infinitesimal numerical value, so that the interfered symbol is assigned to be 0, the interfered symbol is eliminated from the subframe symbol, and the direct influence on the uplink demodulation performance of the target base station due to the existence of the interfered symbol is thoroughly eliminated.
Drawings
FIG. 1 is a schematic diagram of a TDD system remote base station co-channel interference near base station;
fig. 2 is a flowchart of a detection method for eliminating co-channel interference according to an embodiment of the present invention;
fig. 3 is a flowchart of detecting an interfered symbol and demodulating processing according to the second embodiment of the present invention;
fig. 4 is a block diagram of a structure of a detection apparatus for eliminating co-channel interference according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
The first embodiment is as follows:
the invention provides a technical scheme for eliminating co-frequency interference aiming at the problem of co-frequency interference in the prior art, which detects symbols in an uplink subframe of a target base station, which is seriously interfered with the co-frequency of a downlink signal of a remote base station, by detecting and judging each symbol of the uplink subframe of the target base station at a near end, and then carries out zero clearing treatment on data demodulated correspondingly to the interfered symbols, thereby realizing the purpose of thoroughly eliminating the problem that the target base station is interfered with the co-frequency interference of the downlink signal of the remote base station.
Referring to fig. 2, fig. 2 is a flowchart of a detection method for eliminating co-channel interference according to the present invention, which specifically includes the following steps:
s201, calculating the total power of each symbol of an uplink subframe of a target base station;
s202, determining interfered symbols according to the total power of each symbol and a preset threshold value; it should be noted that the threshold is selected according to the demodulation performance of each symbol when the target base station receives the uplink signal.
S203, performing interference suppression processing on the data after the interfered symbol demodulation.
In this embodiment, when determining the interfered symbol according to the total power of each symbol and the threshold, the specific operation process is as follows:
firstly, the total power of a first pilot symbol and all data symbols before the first pilot symbol is selected according to the total power of each symbol of an uplink subframe of a target base station, wherein the position of the first pilot symbol in the subframe symbol can be set according to a communication protocol of the target base station, and generally, the position of the first pilot symbol in the subframe is determined, for example: if the number of the symbols included in the subframe is 14, the position of the first pilot symbol is generally at the position of the fourth symbol; if the number of symbols included in the subframe is 12, the first pilot symbol is usually located at three symbol positions.
Then, calculating the power difference between the selected data symbols and the pilot symbols according to the selected data symbols, and comparing and judging the power difference with the threshold value to judge whether the symbols are interfered symbols;
in the above determination process, if the power difference is greater than the preset threshold, the data symbol corresponding to the power difference is used as an interfered symbol, and interference suppression processing is performed.
In this embodiment, if the number of the selected data symbols is multiple, when calculating the power difference between each data symbol and the pilot symbol, a reverse calculation and determination manner is adopted, the power difference between the last data symbol and the first pilot symbol in all the data symbols is preferentially calculated, then the power difference is compared with the threshold, if the power difference is greater than the threshold, it can be directly determined that the power difference is an interfered symbol for the already-processed data symbol and all the data symbols before the data symbol, and finally, interference suppression processing is performed on the interfered symbol.
In this embodiment, in the process of determining whether the symbol is an interfered symbol, if the power difference is smaller than the threshold, it is determined that the data symbol corresponding to the power difference is not interfered by the downlink signal of the remote base station or the interference is negligible, at this time, the power difference between the previous data symbol of the data symbol and the pilot symbol needs to be sequentially calculated and compared with the threshold, for example: all data symbols selected include P0、P1And P2If P is calculated2Power difference △ P2When the value is less than the threshold value T, calculating the next data symbol P1Power difference △ P1If the judgment result is still smaller than the threshold value, continuing to calculate the data symbol P0Power difference △ P0And ending the judgment operation until all the data symbols are calculated or the power difference of the judgment result is larger than the threshold value, and executing the step S203.
In this embodiment, if all the data symbols are determined to be smaller than the threshold value, all the data symbols are demodulated, decoded, and the like according to the normal demodulation operation.
In this embodiment, a specific calculation formula for calculating the power difference between the total power of each data symbol and the power of the first pilot symbol is as follows:
ΔPi＝Pi-P3，
wherein, Δ PiIs the power difference, PiIs the total power of the symbol, P3Is the total power of the first pilot symbol, i is of the sub-frameCyclic prefix cp (cyclic prefix) of the physical channel; in general, the subframe structure includes two types: one is a Normal cyclic prefix (Normal CP), one slot of which can transmit 7 ofdm (orthogonal Frequency division multiplexing), i.e. the subframe structure includes 14 symbols, and the total power of each symbol of the uplink subframe is PiWhere i is 0,1,2, … …,12,13, the first pilot symbol is the fourth symbol, i.e. P3(ii) a Another subframe structure is an Extended cyclic prefix (Extended CP) with 6 ofdm (orthogonal frequency division multiplexing) slots, i.e. the subframe structure includes 12 symbols, and the total power of each symbol of the uplink subframe is PiWhere i is 0,1,2, … …,10,11, the first pilot symbol is the third symbol, i.e. P2；
In this embodiment, after determining and determining the interfered symbol, step S203 is executed to perform interference suppression processing on the data demodulated by the interfered symbol, where the interference suppression processing includes: directly carrying out zero clearing processing on the modulated data corresponding to the interfered symbol; or, weighting the interfered symbol, wherein the weighting is performed by multiplying the interfered symbol by an infinitesimal value, and optionally, the infinitesimal value may be
By adopting the method to carry out interference suppression processing, the problem of poor demodulation performance when the downlink signal time slot of the remote base station interferes with part of symbols of the uplink subframe of the target base station is effectively solved.
Example two:
referring to fig. 3, fig. 3 is a flowchart illustrating a specific processing procedure for detecting an interfered symbol and demodulating the interfered symbol according to the present embodiment, wherein the processing procedure includes:
s301, calculating the total power P of each symbol of the uplink sub-frame of the target base stationi(dB), for a subframe structure of a general cyclic prefix, whose i is 0,1,2,3, … …,12, 13; for the subframe structure of the extended cyclic prefix, i is 0,1,2, … …,10, 11;
s302, calculating the power difference delta P between the data symbol before the first pilot frequency and the first pilot frequency symboliThe calculation formula is as follows: delta Pi＝Pi-P3Wherein, Δ PiIs the power difference, PiIs the total power of the symbol, P3Is the total power of the first pilot symbol;
for Normal CP, the power difference Δ Pi＝Pi-P3I is 0,1, 2; for Extended CP, the power difference Δ Pi＝Pi-P3，i＝0,1；
S303, judging the power difference delta PiWith the magnitude relation of the threshold value T, the power difference Delta P is judgediIf the threshold value is larger than the threshold value T, the steps S304 and S305 are executed, otherwise, the step S306 is executed.
S304, demodulating the symbol to obtain demodulated data;
s305, performing clear processing on the demodulated data, wherein the interference suppression processing specifically includes the following steps: the demodulated data is directly reset or weighted and multiplied by the demodulated data
The sign is made to be an infinite value, i.e., is treated as 0.
S306, carrying out normal demodulation processing on the symbol to obtain a corresponding demodulated data symbol;
s307, decoding the data symbol or the data symbol after weighted preprocessing;
s308, CRC (Cyclic Redundancy Code) processing is performed on the data decoded in the step S307.
In this embodiment, preferably, taking Normal CP as an example, the first pilot symbol is P3Setting the threshold value T to be 10dB, and the interfered symbols to be 3 data symbols before the first pilot symbol, the specific processing steps are as follows:
firstly, calculating the total power P of each symbol of the uplink U subframeiRespectively is as follows:
[-98,-99,-100,-113,-113.5,-114,-113.3,-113,-113.2,-113.1,-113.6,-113,-112.8,-112.9]；
then, the power difference Δ P between each data symbol and the first pilot symbol is calculated according to the total power of each data symboliThe calculation results are respectively as follows: [15,14,13]；
Further, the power difference Δ P is obtained according to the calculationiComparing with a threshold value T, and if the comparison result is delta P2>T, judging that all the first 3 symbols are not greater than the threshold value T, otherwise, continuously calculating and comparing delta P1、ΔP0The size of the threshold value T;
finally, according to the judged result, the data after the interfered symbol demodulation is carried out the interference suppression processing, namely the demodulated result corresponding to the judged 3 symbols is carried out the clear 0 processing, or multiplied by an infinitesimal numerical value, such as multiplied by an infinitesimal numerical value
For Extended CP, first, the total power P of each symbol of the uplink U sub-frame is calculatediRespectively is as follows:
[-97.6,-98.2,-113.5,-114,-113.3,-113,-113.2,-113.1,-113.6,-113,-112.8,-112.9]；
calculating the power difference deltaP between each data symbol and the first pilot symbol according to the total power of each data symboliThe calculation results are respectively as follows: [15.9,15.3]；
Further, the power difference Δ P is obtained according to the calculationiComparing with a threshold value T, and if the comparison result is delta P1>T, judging that all the first 2 symbols are not greater than the threshold value T, otherwise, continuously calculating and comparing delta P0The size of the threshold value T;
finally, according to the judged result, the data demodulated by the interfered symbol is carried out the interference suppression processing, and the demodulated result corresponding to the judged 3 symbols is carried out the clear 0 processing or multiplied by an infinitesimal numerical value, such as
Example three:
referring to fig. 4, fig. 4 is a structural block diagram of a detection apparatus for eliminating co-channel interference provided in this embodiment, it should be understood that the apparatus may be disposed in any base station to solve the problem that a target base station is subjected to co-channel interference of a downlink signal of a remote base station when receiving an uplink timeslot, as shown in fig. 4, the detection apparatus 40 for eliminating co-channel interference provided in this embodiment of fig. 4 includes: a calculation module 401, a determination module 402 and a processing module 403;
the calculating module 401 is configured to calculate a total power of each symbol of an uplink subframe of the target base station;
the decision module 402 is configured to determine an interfered symbol according to a total power of each symbol and a preset threshold;
the processing module 403 is configured to perform interference suppression processing on the data demodulated by the interfered symbol.
In this embodiment, the apparatus further includes a setting module 404, configured to select and set the threshold according to the demodulation performance of each symbol when the target base station receives uplink.
In this embodiment, the determining module 402 includes a selecting submodule 4021, a calculating submodule 4022, and a determining submodule 4023;
the selecting sub-module 4021 selects the total power of the first pilot symbol and the total power of all data symbols before the first pilot symbol according to the total power of each symbol of the uplink subframe;
the calculation sub-module 4022 calculates a power difference between each data symbol and the pilot symbol;
the decision sub-module 4023 takes the data symbols with the power difference larger than the threshold as the interfered symbols.
In this embodiment, the calculation sub-module 4022 calculates the power difference by the following formula:
ΔPi＝Pi-P3，
wherein, Δ PiIs the power difference, PiIs the total power of the symbol, P3Is as followsThe total power of a pilot symbol, i, is the cyclic prefix CP of the physical channel of a subframe, and generally, the subframe structure includes two types, and the value of i is different according to different subframe structures;
in this embodiment, the determining module 402 further includes a comparing sub-module 4024; if there are multiple data symbols, the calculating sub-module 4022 calculates the power difference between the last data symbol and the first pilot symbol in the data symbols;
the comparison sub-module 4024 compares the power difference with the threshold value;
if the power difference is greater than the threshold value, the determining sub-module 4023 determines that all data symbols before the first pilot symbol are interfered symbols;
if the power difference is smaller than the threshold, the calculating sub-module 4021 sequentially calculates the power difference between the other data symbols and the pilot symbol and compares the power difference with the threshold.
Preferably, in this embodiment, when calculating the power difference between each data symbol and the pilot symbol, a calculation and determination method of a reverse order is adopted, for example: all data symbols selected include P0、P1And P2If P is calculated2Power difference △ P2When the value is less than the threshold value T, calculating the next data symbol P1Power difference △ P1If the judgment result is still smaller than the threshold value, continuing to calculate the data symbol P0Power difference △ P0And ending the judgment operation and executing zero clearing processing on the interfered symbols until all the data symbols are calculated or the power difference of the judgment result is larger than the threshold value.
If all the data symbols are smaller than the threshold value after the judgment is finished, the processing module 403 performs normal mediation processing on all the data symbols.
In this embodiment, after the apparatus 40 determines that a symbol is an interfered symbol, the processing module 403 performs interference suppression zero processing on the data after demodulation of the interfered symbol according to a result of the determination, where the interference suppression processing includes: directly carrying out zero clearing processing on the demodulated data corresponding to the symbols;
or, the interfered symbol is weighted by multiplying the interfered symbol by an infinitesimal value, preferably by
In summary, the detection method and apparatus for eliminating co-channel interference provided by the present invention determine whether each symbol of the uplink subframe of the target base station is interfered by the downlink signal of the remote base station by detecting and judging each symbol, and further determine the interfered symbol by calculating the total power of each symbol and combining the preset threshold value, and perform interference suppression processing on the data demodulated by the interfered symbol, and the detection method provided by the present invention realizes elimination of co-channel interference, and the total power of each symbol is relatively easy to detect, so that the implementation process of the method is simple and practical, and the overall performance of the system can be ensured; the method provided by the invention can effectively improve the problem that the demodulation performance is reduced when part of data symbols are seriously interfered, and improves the uplink throughput of the target base station.
It will be apparent to those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented in program code executable by a computing device, such that they may be stored on a storage medium (ROM/RAM, magnetic disk, optical disk) and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A detection method for eliminating co-channel interference is characterized by comprising the following steps:
calculating the total power of each symbol of an uplink subframe of a target base station;
determining interfered symbols according to the total power of each symbol and a preset threshold value; the determining the interfered symbol according to the total power of each symbol and the preset threshold specifically includes:
selecting the total power of a first pilot frequency symbol and the total power of each data symbol before the first pilot frequency symbol according to the total power of each symbol of an uplink subframe;
calculating the power difference between each data symbol and the first pilot frequency symbol;
taking the data symbol with the power difference larger than the threshold value as an interfered symbol;
and carrying out interference suppression processing on the data after the interfered symbol demodulation.
2. The detection method for eliminating co-channel interference according to claim 1, wherein the threshold value is selectively set according to demodulation performance of each symbol when the target base station receives uplink.
3. The method according to claim 1, wherein the interference suppression processing on the data demodulated by the interfered symbol specifically comprises:
directly carrying out zero clearing processing on the demodulated data corresponding to the interfered symbol;
or, performing weighting processing on the demodulated data corresponding to the interfered symbol, where the weighting processing is to multiply the interfered symbol by an infinitesimal value.
4. The detection method for eliminating co-channel interference according to claim 1, wherein if there are a plurality of data symbols, the power difference between the last data symbol in the data symbols and the first pilot symbol is calculated first;
comparing the power difference to the threshold value;
if the power difference is larger than the threshold value, all data symbols before the first pilot frequency symbol are determined to be interfered symbols;
and if the power difference is smaller than the threshold value, calculating the power difference between other data symbols and the first pilot frequency symbol in a reverse order and comparing the power difference with the threshold value.
5. A detection device for eliminating co-channel interference is characterized by comprising:
the calculation module is used for calculating the total power of each symbol of an uplink subframe of the target base station;
the judging module is used for determining the interfered symbol according to the total power of each symbol and a preset threshold value; the judgment module comprises a selection submodule, a calculation submodule and a judgment submodule;
the selection submodule selects the total power of the first pilot frequency symbol and the total power of each data symbol before the first pilot frequency symbol according to the total power of each symbol of the uplink subframe;
the calculation submodule calculates the power difference between each data symbol and the first pilot frequency symbol;
the judgment sub-module takes the data symbol with the power difference larger than the threshold value as an interfered symbol;
and the processing module is used for carrying out interference suppression processing on the data after the interfered symbol is demodulated.
6. The apparatus of claim 5, further comprising a setting module, configured to select and set the threshold according to the demodulation performance of each symbol when the target base station receives uplink.
7. The apparatus according to claim 5, wherein the processing module is specifically configured to directly perform zero clearing on the demodulated data corresponding to the interfered symbol;
or, performing weighting processing on the demodulated data corresponding to the interfered symbol, where the weighting processing is to multiply the interfered symbol by an infinitesimal value.
8. The apparatus for eliminating co-channel interference according to claim 5, wherein the decision module further comprises a comparison sub-module;
if the number of the data symbols is multiple, the calculation submodule calculates the power difference between the last data symbol in the data symbols and the first pilot frequency symbol;
the comparison submodule compares the power difference with the threshold value;
if the power difference is larger than the threshold value, the judgment sub-module determines that all data symbols before the first pilot frequency symbol are interfered symbols;
and if the power difference is smaller than the threshold value, the calculation sub-module calculates the power difference between other data symbols and the first pilot frequency symbol in a reverse order and compares the power difference with the threshold value.
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| CN103327599A (en) * | 2012-03-22 | 2013-09-25 | 华为技术有限公司 | Method for reducing channel disturbance and base station |
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| CN102143568A (en) * | 2010-11-26 | 2011-08-03 | 华为技术有限公司 | Power control method and base station |
| CN102355681A (en) * | 2011-10-09 | 2012-02-15 | 大唐移动通信设备有限公司 | Method for detecting interference in long-term evolution system and equipment |
| WO2013066416A1 (en) * | 2011-11-04 | 2013-05-10 | Intel Corporation | Signaling for configuration of downlink coordinated multipoint communications |
| CN103327599A (en) * | 2012-03-22 | 2013-09-25 | 华为技术有限公司 | Method for reducing channel disturbance and base station |
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