CN103701736B - Disturbance restraining method and device in LTE system - Google Patents
Disturbance restraining method and device in LTE system Download PDFInfo
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- CN103701736B CN103701736B CN201310752937.XA CN201310752937A CN103701736B CN 103701736 B CN103701736 B CN 103701736B CN 201310752937 A CN201310752937 A CN 201310752937A CN 103701736 B CN103701736 B CN 103701736B
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Abstract
This application provides the disturbance restraining method in a kind of LTE system and device, this method includes：Determine the position being disturbed in subframe；Interference matrix is calculated using the position being disturbed；According to interference matrix, AF panel is carried out to subframe.The application can improve the accuracy of AF panel.
Description
Technical field
The application is related to technical field of measurement and test, more particularly to a kind of Long Term Evolution（Long Term Evolution,
LTE）Disturbance restraining method and device in system.
Background technology
Co-channel interference can be produced more by being used in real network planning, LTE system in identical networking mode, system.In addition,
Due to LTE system be also required to it is adjacent with the communication system of other standards, therefore, also often by TD SDMA
（Time Division-Synchronous Code Division Multiple Access, TD-SCDMA）, the whole world it is mobile logical
Letter system（Global System for Mobile Communications, GSM）Etc. the spuious or Intermodulation Interference of system,
LTE service quality, especially uplink service are had undesirable effect.
At present, in LTE receivers, use interference rejection combination more（Interference Rejection
Combining, IRC）Algorithm suppresses to interference, and IRC equalization algorithm formula are as follows：
X=(HHSH+C)-1HHSy；
Wherein, x is equilibrium result, and y is aerial signal, and H is channel estimation results, i.e. channel estimation value,AndFor NR×NRInterference noise covariance matrix；For NT×NTTransmission signal covariance
Matrix, NRFor reception antenna number, NTFor transmitting antenna number.The key of the algorithm is to obtain accurate H, CnAnd S.
In the prior art, the H and S of whole subframe are calculated by two frequency pilot signs in a subframe, or is passed through
Frequency pilot sign in preceding 7 OFDM symbols of one subframe calculates the H and S of preceding 7 OFDM symbols, passes through rear the 7 of a subframe
The H and S of 7 OFDM symbols after frequency pilot sign in individual OFDM symbol is calculated.
During actual test, LTE system also can by other systems spuious or Intermodulation Interference, use existing skill
Interference mechanism method in art, the accuracy of AF panel is not high.
The content of the invention
Technical problems to be solved in this application are to provide disturbance restraining method and device in a kind of LTE system, can
Improve the accuracy of AF panel.
In order to solve the above problems, this application discloses the disturbance restraining method in a kind of LTE system, including：It is determined that sub
The position being disturbed in frame；Interference matrix is calculated using the position being disturbed；According to interference matrix, interference suppression is carried out to subframe
System.
Preferably, determine that the position being disturbed in subframe includes：Determine the orthogonal frequency division multiplex OFDM being disturbed in subframe
Symbol；Included using the position being disturbed to calculate interference matrix：Interference matrix is calculated using the OFDM symbol being disturbed.
Preferably, the OFDM symbol being disturbed in subframe is determined, including：Determine two frequency pilot signs in subframe by
Interference；Interference matrix is calculated using the OFDM symbol being disturbed, including：Interference square is calculated using two frequency pilot signs in subframe
Battle array and channel estimation value.
Preferably, the OFDM symbol being disturbed in subframe is determined, including：Determine the first frequency pilot sign in subframe by dry
Disturb, the second frequency pilot sign in subframe is not affected by interference；Interference matrix is calculated using the OFDM symbol being disturbed, including：Use
First frequency pilot sign calculates interference matrix, and channel estimation value is calculated using the second frequency pilot sign.
Preferably, the OFDM symbol being disturbed in subframe is determined, including：Determine two frequency pilot signs in subframe not by
To interference, determine that N number of OFDM data symbol in subframe is interfered, wherein, N is positive integer；Use the OFDM symbols being disturbed
Number calculate interference matrix, including：Interference matrix is calculated using N number of OFDM data symbol, channel is calculated using two frequency pilot signs
Estimate.
Preferably, according to interference matrix, AF panel is carried out to subframe, including：
AF panel is carried out to the OFDM symbol being disturbed in subframe using following formula：
X=(HHSH+C)-1HHSy；
Wherein, x is equilibrium result, and y is aerial signal, and H is channel estimation results, interference matrixFor NR×NRInterference matrix covariance matrix；For NT×NTTransmission signal covariance
Matrix, NRFor reception antenna number, NTFor transmitting antenna number.
Preferably, determine that the OFDM symbol being disturbed in subframe includes：Detect the power of each OFDM symbol in subframe；Sentence
Whether the difference of the power of the second OFDM symbol in the power and subframe of the first OFDM symbol in disconnected subframe is more than first threshold,
Wherein, the first OFDM symbol is the OFDM symbol of power minimum in subframe；If it is, determining that the second OFDM symbol is to be disturbed
OFDM symbol.
Preferably, determine that the OFDM symbol being disturbed in subframe includes：Detect the power of each OFDM symbol in subframe；Really
The average value of the power of OFDM symbol in stator frame；Judge the 3rd OFDM symbol in subframe power and average value difference whether
More than first threshold；If it is, determining that the 3rd OFDM symbol is the OFDM symbol being disturbed.
In order to solve the above problems, this application discloses the interference rejection unit in a kind of LTE system, including：It is determined that single
Member, for determining the position being disturbed in subframe；Computing unit, for calculating interference matrix using the position being disturbed；It is dry
Suppression unit is disturbed, for according to interference matrix, AF panel to be carried out to subframe.
Preferably, determining unit is used for the orthogonal frequency division multiplex OFDM symbol for determining to be disturbed in subframe；Computing unit is used
Interference matrix is calculated in using the OFDM symbol that is disturbed.
Compared with prior art, the application has advantages below：
In this application, it is first determined the position being disturbed in subframe, and according to the position being disturbed interference square is calculated
Battle array S, then, AF panel is carried out using S to subframe.S is calculated by using the position being disturbed, accurately estimated to realize
S, accurate S can improve the accuracy of AF panel, therefore, and the application can play the effect for the accuracy for improving AF panel
Really.
Brief description of the drawings
Fig. 1 is the schematic diagram of the GSM frame structure according to prior art；
Fig. 2 is the schematic diagram of the LTE frame structures according to prior art；
Fig. 3 is the schematic diagram according to LTE frames of the prior art the first situation overlapping with GSM frame；
Fig. 4 is the schematic diagram according to LTE frames of the prior art second situation overlapping with GSM frame；
Fig. 5 is the schematic diagram according to LTE frames of the prior art the third situation overlapping with GSM frame；
Fig. 6 is the flow chart of the disturbance restraining method in a kind of according to embodiments of the present invention one LTE system；
Fig. 7 is the structured flowchart of the interference rejection unit in a kind of according to embodiments of the present invention three LTE system.
Embodiment
It is below in conjunction with the accompanying drawings and specific real to enable above-mentioned purpose, the feature and advantage of the application more obvious understandable
Mode is applied to be described in further detail the application.
In the prior art, LTE system may receive the interference of other standard systems.By taking gsm system as an example, GSM systems
The band downlink of system is 935~960MHz, if the emission system linearity is inadequate, it is possible to create 2 subharmonic, harmonic frequency is
1870~1920, this is just LTE F-band.If GSM antenna and LTE isolation between antennas is not high, GSM harmonic wave is just
Strong jamming may be produced to LTE system upstream data.
Fig. 1 show GSM frame structure, wherein, GSM basic time slot is 0.577ms, and Fig. 2 is the frame structure of LTE system
Figure, as shown in Fig. 2 the basic time slot of LTE system is 1ms；Therefore, GSM may have following 3 kinds of superpositions feelings with LTE channel
Condition：
1st, as shown in figure 3, part GSM time slots are superimposed with LTE sub-frame of uplink, GSM only interferes with one of LTE sub-frame of uplink
Frequency pilot sign；
2nd, as shown in figure 4, whole GSM time slots are superimposed with LTE sub-frame of uplink, two frequency pilot signs of LTE sub-frame of uplink
It is interfered；
3rd, as shown in figure 5, only small part GSM is superimposed with LTE sub-frame of uplink, GSM does not interfere with leading for LTE sub-frame of uplink
Frequency symbol；
For the 1st kind and the 2nd kind of situation, can at least there is a pilot tone to be used to estimate S in LTE system；But, it is not
All data symbols are interfered, and prior art carries out AF panel using same s-matrix to all data symbols, may
Extra suppression can be produced to the data symbol for being not affected by interference, reduce the accuracy of AF panel, have impact on data transfer
Quality.For the 3rd kind of situation, because pilot tone is not interfered, so the S estimated using pilot tone is inaccurate, reduction
The accuracy of AF panel.
In order to solve the above problems, the application proposes the AF panel scheme in a kind of LTE system, in this scenario, first
The position being disturbed in subframe is first determined, interference matrix S is calculated according to the position being disturbed, so as to accurately estimate S,
The accuracy of AF panel can be improved using accurate S.
Reference picture 6, shows the disturbance restraining method in a kind of LTE system of the application, and this method can be used for suppressing LTE
The inter-system interference that system is subject to.Base station in LTE system can use this method.As shown in fig. 6, this method includes：
Step 602, the position being disturbed in subframe is determined.
, can be with OFDM when implementing（Orthogonal Frequency Division
Multiplexing, OFDM）Symbol is that granularity determines the position that is disturbed in subframe or true by granularity of other unit
The position being disturbed in stator frame.The present embodiment is illustrated by taking OFDM symbol as an example, and other unit can also use similar
Mode, will not be repeated here.
When using OFDM symbol as granularity, it may be determined that whether each OFDM symbol is interfered in a subframe,
It can also only judge whether two frequency pilot signs in the subframe are interfered, if two pilot signals are to be interfered,
It can then determine whether whether other OFDM symbols in the subframe are interfered.
In a preferred embodiment of the embodiment of the present invention, it can determine to be disturbed in subframe one of in the following manner
Position：
The power of each OFDM symbol in mode one, detection subframe；Judge the power of the first OFDM symbol in subframe with
Whether the difference of the power of the second OFDM symbol in subframe is more than first threshold, wherein, the first OFDM symbol is power in subframe
Minimum OFDM symbol；If it is, determining that the second OFDM symbol is the OFDM symbol being disturbed, otherwise, it determines the 2nd OFDM
Symbol is interference-free OFDM symbol.
The power of each OFDM symbol in mode two, detection subframe；Determine the average value of the power of OFDM symbol in subframe；
Judge whether the power of the 3rd OFDM symbol in subframe and the difference of average value are more than first threshold；If it is, determining the 3rd
OFDM symbol is the OFDM symbol being disturbed, otherwise, it determines the 3rd OFDM symbol is interference-free OFDM symbol.
By the above-mentioned means, can easily determine which OFDM symbol is the symbol being disturbed
Step 604, interference matrix is calculated using the position being disturbed.
When using OFDM symbol as granularity, the OFDM symbol being disturbed can be used to calculate interference matrix.
When two frequency pilot signs in a subframe are interfered, the two frequency pilot signs can be used to calculate interference
Matrix and channel estimation value, the mode of calculating can use existing computational methods, will not be repeated here.In the present embodiment,
Interference matrix is calculated using the frequency pilot sign being interfered, so that the accuracy of interference matrix is improved, as it was previously stated, interference
The effect of suppression is relevant with S accuracy, therefore, with the raising of the accuracy of interference matrix, the effect of AF panel also with
Improve.
When the first frequency pilot sign in subframe is interfered, when the second frequency pilot sign is not affected by interference, using receiving interference
The first frequency pilot sign calculate interference matrix, use do not receive interference the second frequency pilot sign calculate channel estimation value.In this reality
Apply in example, interference noise is calculated using the pilot signal being interfered, calculating channel using the pilot signal for not receiving interference estimates
Evaluation, this improves both the accuracy of interference matrix and channel estimation value, as it was previously stated, the effect of AF panel is with S's and H
Accuracy is relevant, therefore, with the raising of interference matrix and the accuracy of channel estimation value, and the effect of AF panel is also carried therewith
Gao Liao.
When two frequency pilot signs in subframe are not affected by N number of OFDM data symbol in interference, and the subframe by dry
When disturbing, interference matrix is calculated using this N number of OFDM data symbol, channel estimation value is calculated using two frequency pilot signs, wherein,
N is positive integer.When frequency pilot sign does not receive interference, the interference matrix obtained using pilot signal is inaccurate, in this reality
Apply in example, by using the data symbol being interfered（OFDM data symbol）To calculate interference matrix, interference noise is improved
Accuracy.It should be noted that calculating the mode of interference matrix using data symbol and calculating interference using frequency pilot sign
The mode of matrix is identical, therefore, be will not be repeated here.
Step 606, according to interference matrix, AF panel is carried out to subframe.
During implementing, following formula can be used to carry out AF panel to the OFDM symbol being disturbed in subframe：
X=(HHSH+C)-1HHSy；
Wherein, x is equilibrium result, and y is aerial signal, and H is channel estimation results, interference matrix For NR×NRInterference matrix covariance matrix；For NT×NTTransmission signal covariance matrix, NRFor
Reception antenna number, NTFor transmitting antenna number.
In the present embodiment, it is first determined the position being disturbed in subframe, and according to the position being disturbed interference is calculated
Matrix S, then, AF panel is carried out using S to subframe.Interference matrix S is calculated by using the position being disturbed, to realize
S accurately is estimated, accurate S can improve the accuracy of AF panel, therefore, and the present embodiment can play raising AF panel
Accuracy effect.
Embodiment two
The embodiment of the present invention additionally provides the disturbance restraining method in a kind of LTE system, in the present embodiment, LTE system
In equipment, for example, the time-domain position that LTE base station can be where Intelligent Measurement interference, judges that current interference is superimposed situation, example
Such as, current interference belongs to any in superposition situation in above-mentioned 3；After interference superposition situation is judged, different are folded
Plus situation takes different anti-interference methods.
Because all symbols are launched using Unified Power in LTE system sub-frame of uplink, so distinct symbols in the 1ms times
Between power will not differ too big；Must be the superposition for receiving certain interference signal if difference is larger；It therefore, it can lead to
Cross the time-domain position that this characteristic judges interference.During the time domain superposed positions that automatic decision is disturbed, in of judgement
, can be using OFDM symbol level, it would however also be possible to employ other granularities in granularity, said below by granularity of OFDM symbol
It is bright, judge that the method for being disturbed position can include：
The LTE radio front end signal that will eat dishes without rice or wine carries out being down-converted to base band, and carries out analog-digital converter（Analog-Digital
Converter, ADC）Sampling；
OFDM symbol asks for symbol general power P (0), P (1) ... P (13) to the baseband signal sampled to ADC one by one；
Find the minimum symbol of power, Pmin；
The power of all symbols is compared with minimum symbol power, if gap is more than α db, then it is assumed that the symbol system
System is outer to be disturbed, and now interference mark can be set into 1, i.e. Interfere_flag (symbol_index)=1, otherwise it is assumed that
The symbol is not affected by outside system and disturbed, and now interference mark can be set into 0, i.e. Interfere_flag (symbol_
index)=0。
It is determined that after the time-domain position of interference, different strategies can be taken to press down interference according to court verdict
System.If for example, in a subframe, having that a frequency pilot sign receives interference and another symbol is not interfered, then
Channel estimation value H is calculated using the frequency pilot sign for the interference not being subject to, the H now obtained uses what is be interfered than calibrated
Frequency pilot sign calculates interference matrix S, and the S now obtained is than calibrated；If two frequency pilot signs of a subframe all receive dry
Disturb, then obtain H and S using two frequency pilot signs of time slot where symbol to be equalized to calculate；If two of a subframe
Frequency pilot sign is not all interfered, then can not calculate S by frequency pilot sign, at this point it is possible to using the symbol being interfered
Data（That is, data symbol or OFDM data symbol）S is calculated, due on the frequency domain resource position where these symbols, disturbing
Signal intensity is much larger than signal intensity, so directly using frequency domain symbol data, can also obtain the covariance matrix of interference, obtain
S。
Method described above is that interference position is judged according to difference power, but the application is not limited to this, can also
Interference position is judged using other determination methods, as long as can interpolate that out interference position.
The flow of the disturbance restraining method of the present embodiment can be shown as by pseudo table：
In the present embodiment, it is first determined the position being disturbed in subframe, and according to the position being disturbed interference is calculated
Matrix S, then, AF panel is carried out using S to subframe.Interference matrix S is calculated by using the position being disturbed, to realize
S accurately is estimated, accurate S can improve the accuracy of AF panel, therefore, and the present embodiment can play raising AF panel
Accuracy effect.By the present embodiment, while the co-channel interference in system has preferable inhibition, to being
Interference between system can also have preferable inhibition.
Embodiment three
As shown in fig. 7, showing the interference rejection unit in a kind of LTE system, the device can be the base in LTE system
Stand, the device can be used for realizing the method in above method embodiment, therefore, the feature in above method embodiment can be tied
Close in the present embodiment.As shown in fig. 7, the device includes：
Determining unit 72, for determining the position being disturbed in subframe；
Computing unit 74, for calculating interference matrix using the position being disturbed；
AF panel unit 76, for according to interference matrix, AF panel to be carried out to subframe.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used for the OFDM symbols for determining to be disturbed in subframe
Number；Computing unit 74 is used to calculate interference matrix using the OFDM symbol being disturbed.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used to determine two frequency pilot signs in subframe
It is interfered；Computing unit 74 is used to calculate interference matrix and channel estimation value using two frequency pilot signs in subframe.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used to determine the first frequency pilot sign in subframe
It is interfered, the second frequency pilot sign in subframe is not affected by interference；Computing unit 74 is used to calculate dry using the first frequency pilot sign
Matrix is disturbed, channel estimation value is calculated using the second frequency pilot sign.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used to determine two frequency pilot signs in subframe
Interference is not affected by, determines that N number of OFDM data symbol in subframe is interfered, wherein, N is positive integer；Computing unit 74 is used
In calculating interference matrix using N number of OFDM data symbol, channel estimation value is calculated using two frequency pilot signs.
In a preferred embodiment of the embodiment of the present invention, AF panel unit 76 be used for using following formula in subframe by
The OFDM symbol of interference carries out AF panel：
X=(HHSH+C)-1HHSy；
Wherein, x is equilibrium result, and y is aerial signal, and H is channel estimation results, interference matrixFor NR×NRInterference matrix covariance matrix；For NT×NTTransmission signal covariance
Matrix, NRFor reception antenna number, NTFor transmitting antenna number.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used for：Detect each OFDM symbol in subframe
Power；Judge whether the difference of the power of the second OFDM symbol in the power and subframe of the first OFDM symbol in subframe is more than
First threshold, wherein, the first OFDM symbol is the OFDM symbol of power minimum in subframe；If it is, determining the 2nd OFDM symbols
Number it is the OFDM symbol being disturbed.
In a preferred embodiment of the embodiment of the present invention, determining unit 72 is used for：Detect each OFDM symbol in subframe
Power；Determine the average value of the power of OFDM symbol in subframe；Judge the power of the 3rd OFDM symbol in subframe and be averaged
Whether the difference of value is more than first threshold；If it is, determining that the 3rd OFDM symbol is the OFDM symbol being disturbed.
In the present embodiment, it is first determined the position being disturbed in subframe, and according to the position being disturbed interference is calculated
Matrix S, then, AF panel is carried out using S to subframe.Interference matrix S is calculated by using the position being disturbed, to realize
S accurately is estimated, accurate S can improve the accuracy of AF panel, therefore, and the present embodiment can play raising AF panel
Accuracy effect.By the present embodiment, while the co-channel interference in system has preferable inhibition, to being
Interference between system can also have preferable inhibition.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
Between the difference of other embodiment, each embodiment identical similar part mutually referring to.For system embodiment
For, because it is substantially similar to embodiment of the method, so description is fairly simple, referring to the portion of embodiment of the method in place of correlation
Defend oneself bright.
Above to the disturbance restraining method and device in a kind of LTE system provided herein, it is described in detail,
Specific case used herein is set forth to the principle and embodiment of the application, and the explanation of above example is to use
Understand the present processes and its core concept in help；Simultaneously for those of ordinary skill in the art, according to the application's
Thought, will change in specific embodiments and applications, in summary, and this specification content should not be construed as
Limitation to the application.
Claims (5)
1. the disturbance restraining method in a kind of Long Term Evolution LTE system, it is characterised in that including：
Determine the position being disturbed in subframe；Including：Determine the orthogonal frequency division multiplex OFDM symbol being disturbed in the subframe；
Interference matrix is calculated using the position being disturbed；Including：Interference is calculated using the OFDM symbol being disturbed
Matrix and channel estimation value；
According to the interference matrix and the channel estimation value, AF panel is carried out to the subframe；
Wherein it is determined that the OFDM symbol being disturbed in the subframe, including：Determine two frequency pilot signs in the subframe by
To interference；Interference matrix and channel estimation value are calculated using the OFDM symbol being disturbed, including：Using in the subframe
Two frequency pilot signs calculate the interference matrix and channel estimation value；
The OFDM symbol being disturbed in the subframe is determined, including：Determine that the first frequency pilot sign in the subframe is interfered,
The second frequency pilot sign in the subframe is not affected by interference；Interference matrix and channel are calculated using the OFDM symbol being disturbed
Estimate, including：The interference matrix is calculated using first frequency pilot sign, channel is calculated using second frequency pilot sign
Estimate；
The OFDM symbol being disturbed in the subframe is determined, including：Determine that two in the subframe frequency pilot signs are not affected by
Interference, determines that N number of OFDM data symbol in the subframe is interfered, wherein, N is positive integer；It is disturbed using described
OFDM symbol calculates interference matrix and channel estimation value, including：The interference square is calculated using N number of OFDM data symbol
Battle array, channel estimation value is calculated using described two frequency pilot signs.
2. the method as described in claim 1, it is characterised in that according to the interference matrix and the channel estimation value, to institute
State subframe and carry out AF panel, including：
AF panel is carried out to the OFDM symbol being disturbed in the subframe using following formula：
X=(HHSH+C)-1HHSy；
Wherein, x is equilibrium result, and y is aerial signal, and H is the channel estimation results, the interference matrix For NR×NRInterference matrix covariance matrix；For NT×NTTransmission signal covariance square
Battle array, NRFor reception antenna number, NTFor transmitting antenna number.
3. the method as described in claim 1, it is characterised in that determine that the OFDM symbol being disturbed in the subframe includes：
Detect the power of each OFDM symbol in the subframe；
Judging the difference of the power of the second OFDM symbol in the power and the subframe of the first OFDM symbol in the subframe is
It is no to be more than first threshold, wherein, first OFDM symbol is the OFDM symbol of power minimum in the subframe；
If it is, determining that second OFDM symbol is the OFDM symbol being disturbed.
4. the method as described in claim 1, it is characterised in that determine that the OFDM symbol being disturbed in the subframe includes：
Detect the power of each OFDM symbol in the subframe；
Determine the average value of the power of OFDM symbol in the subframe；
Judge whether the power of the 3rd OFDM symbol in the subframe and the difference of the average value are more than first threshold；
If it is, determining that the 3rd OFDM symbol is the OFDM symbol being disturbed.
5. the interference rejection unit in a kind of Long Term Evolution LTE system, it is characterised in that including：
Determining unit, for determining the position being disturbed in subframe；The determining unit is additionally operable to determine in the subframe by dry
The orthogonal frequency division multiplex OFDM symbol disturbed；
Computing unit, for calculating interference matrix using the position being disturbed；The computing unit is also used for institute
State the OFDM symbol being disturbed and calculate interference matrix and channel estimation value；
AF panel unit, for according to the interference matrix and the channel estimation value, AF panel to be carried out to the subframe；
Wherein, the determining unit is additionally operable to determine that two frequency pilot signs in subframe are interfered；The computing unit is also
For calculating interference matrix and channel estimation value using two frequency pilot signs in subframe；
The determining unit is additionally operable to determine that the first frequency pilot sign in subframe is interfered, and the second frequency pilot sign in subframe is not
It is interfered；The computing unit is also used for the first frequency pilot sign and calculates interference matrix, is calculated using the second frequency pilot sign
Channel estimation value；
The determining unit is additionally operable to determine that two frequency pilot signs in subframe are not affected by interference, determines N number of number in subframe
It is interfered according to OFDM symbol, wherein, N is positive integer；The computing unit is also used for N number of OFDM data symbol and calculates dry
Matrix is disturbed, channel estimation value is calculated using two frequency pilot signs.
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| CN103916229B (en) * | 2014-04-29 | 2017-12-08 | 电信科学技术研究院 | A kind of disturbance restraining method and device |
| CN107294636B (en) * | 2016-03-30 | 2020-09-01 | 中兴通讯股份有限公司 | Detection method and device for eliminating co-channel interference |
| CN108833315B (en) * | 2018-09-27 | 2021-09-10 | 北京四季豆信息技术有限公司 | Channel estimation method and device |
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| CN103155442A (en) * | 2011-04-25 | 2013-06-12 | 株式会社Ntt都科摩 | Mobile communication terminal |
| CN103379078A (en) * | 2012-04-27 | 2013-10-30 | 电信科学技术研究院 | Method and device for frequency domain balancing detection |
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| US8064413B2 (en) * | 2006-05-12 | 2011-11-22 | At&T Intellectual Property I, L.P. | Adaptive rate and reach optimization for wireless access networks |
| US8699448B2 (en) * | 2009-12-09 | 2014-04-15 | Telefonaktiebolaget L M Ericsson (Publ) | Method and arrangement for improved interference rejection combining |
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|---|---|---|---|---|
| CN101577692A (en) * | 2009-06-15 | 2009-11-11 | 北京邮电大学 | Channel estimating method of orthogonal frequency division multiplexing system and device thereof |
| CN103155442A (en) * | 2011-04-25 | 2013-06-12 | 株式会社Ntt都科摩 | Mobile communication terminal |
| CN103379078A (en) * | 2012-04-27 | 2013-10-30 | 电信科学技术研究院 | Method and device for frequency domain balancing detection |
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