CN103916229B - A kind of disturbance restraining method and device - Google Patents
A kind of disturbance restraining method and device Download PDFInfo
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- CN103916229B CN103916229B CN201410178853.4A CN201410178853A CN103916229B CN 103916229 B CN103916229 B CN 103916229B CN 201410178853 A CN201410178853 A CN 201410178853A CN 103916229 B CN103916229 B CN 103916229B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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Abstract
The invention discloses a kind of disturbance restraining method and device.Its method includes：Determine whether each OFDM symbol is interfered on the t easet ofasubcarriers that each PRB pair is answered in current time slots；OFDM symbol to be disturbed determines the interference matrix on the t easet ofasubcarriers that each PRB pair where interference is answered；The interference matrix on t easet ofasubcarriers answered according to each disturbed PRB pair, data symbol on the t easet ofasubcarriers answered for each disturbed PRB pair carries out AF panel, the t easet ofasubcarriers that disturbed PRB pair is answered are the t easet ofasubcarriers that the PRB pair where the interference for the OFDM symbol being disturbed is answered, and the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered is interference matrix of the OFDM symbol being disturbed on the t easet ofasubcarriers.Due to considering the interference characteristic of data symbol, therefore it can effectively suppress the interference on data symbol.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of disturbance restraining method and device.
Background technology
Long Term Evolution (Long Term Evolution, LTE) system substantially uses F-band (1880-1920MHz),
LTE system is up to be primarily present following several different system interferences in this frequency range：Global system for mobile communications (Global
System for Mobile communication, GSM) 900 frequency range second order inter-modulations are disturbed, GSM1800 third order intermodulations are disturbed,
The interference that TD SDMA (TD-S) does not introduce by force in F-band block capability, personal handyphone system (Personal
Handy-phone System, PHS) interference of network adjacent frequency etc..
The up interference in F-band of LTE typically merges (Interference Rejection by AF panel
Combining, IRC) carry out AF panel.Interference matrix is obtained particular by ascending pilot frequency sign computation, then according to meter
Obtained interference matrix carries out the balanced detections of IRC on upstream data symbol, obtains weighted value by the balanced detections of IRC, enters
And realize AF panel.
In a LTE sub-frame of uplink, different system interference is generally arrowband interference, and in different orthogonal frequency division multiplexing
(OFDM) interference characteristic on symbol does not have certain rule, once interference that frequency pilot sign is subject to and it is subject on data symbol
When interference characteristic is inconsistent, desired interference matrix can not be obtained, the interference on data symbol is difficult to suppress, and causes to circulate superfluous
Remaining (CRC) check errors.
The content of the invention
It is an object of the invention to provide a kind of disturbance restraining method and device, to solve to carry out interference suppression using IRC at present
The problem of system is present.
The purpose of the present invention is achieved through the following technical solutions：
A kind of disturbance restraining method, including：
Determine each OFDM symbols of current time slots corresponding to each Physical Resource Block (PRB) on t easet ofasubcarriers whether
It is interfered；
OFDM symbol to be disturbed determines the interference square on the t easet ofasubcarriers that each PRB pair where interference is answered
Battle array；
The interference matrix on t easet ofasubcarriers answered according to each disturbed PRB pair, the subcarrier answered for each disturbed PRB pair
The OFDM symbol that collection closes for transmitting data-signal carries out AF panel.
Wherein, for transmitting the OFDM symbol i.e. data symbol of data-signal.
Wherein, the set that the subcarrier that the t easet ofasubcarriers that PRB pair is answered, i.e. PRB include is formed.For example, existing protocol is advised
Fixed, PRB includes 12 subcarriers on frequency domain, then the t easet ofasubcarriers that PRB pair is answered are exactly 12 subcarrier structures that the PRB is included
Into set.
Wherein, the t easet ofasubcarriers that disturbed PRB pair is answered are to be disturbed for transmitting pilot signal or data-signal
The t easet ofasubcarriers that PRB pair where the interference of OFDM symbol is answered.
Wherein, the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered be disturbed be used for transmit pilot signal or
Interference matrix of the OFDM symbol of data-signal on the t easet ofasubcarriers.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
It is preferred that the interference matrix on the t easet ofasubcarriers answered according to each disturbed PRB pair, should for each disturbed PRB pair
T easet ofasubcarriers on data symbol carry out AF panel, can with but be not limited only to realize in the following way：
It is used for OFDM symbol (the i.e. pilot tone for transmitting pilot signal on the t easet ofasubcarriers answered according to the disturbed PRB pair of the first kind
Symbol) interference matrix on the t easet ofasubcarriers that the disturbed PRB pair of the first kind is answered, merged by AF panel disturbed to the first kind
Data symbol on the t easet ofasubcarriers that PRB pair is answered carries out AF panel；Wherein, the subcarrier collection that the disturbed PRB pair of the first kind is answered
It is combined into only frequency pilot sign and the t easet ofasubcarriers that the PRB pair of interference matrix is answered is thereon present；
The son that the frequency pilot sign on t easet ofasubcarriers answered according to the disturbed PRB pair of the second class is answered in the disturbed PRB pair of the second class
The data symbol on t easet ofasubcarriers that interference matrix and the disturbed PRB pair of the second class in carrier set are answered is disturbed in the second class
The interference matrix on t easet ofasubcarriers that PRB pair is answered, the subcarrier collection answered the disturbed PRB pair of the second class is merged by AF panel
The data symbol closed carries out AF panel；The t easet ofasubcarriers that the disturbed PRB pair of second class is answered are frequency pilot sign and data symbol
The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon be present；
The son that the data symbol on t easet ofasubcarriers answered according to the 3rd disturbed PRB pair of class is answered in the 3rd disturbed PRB pair of class
Interference matrix in carrier set, the data on the t easet ofasubcarriers answered the 3rd disturbed PRB pair of class are merged by AF panel
Symbol carries out AF panel；The t easet ofasubcarriers that the 3rd disturbed PRB pair of class is answered are that only data symbol has interference matrix thereon
The t easet ofasubcarriers answered of PRB pair.
Based on above-mentioned any embodiment, the OFDM symbol to be disturbed determines the subcarrier answered in the PRB pair where interference
The mode for the interference matrix that collection closes has a variety of.Enumerate below wherein several：
Mode one, it can be determined with as follows one data symbol to be disturbed in a PRB pair where interference
The interference matrix on t easet ofasubcarriers answered：
It is determined that in the t easet ofasubcarriers that the PRB pair where interference is answered, the received signal strength on the data symbol is most
Big subcarrier；
It is that the data symbol is determined at this according to the reception signal if the intensity of the reception signal is more than the threshold value of setting
The interference matrix on t easet ofasubcarriers that PRB pair is answered；
If threshold value of the intensity of the reception signal no more than setting, by the data symbol adjacent with the PRB disturbed
The interference matrix on t easet ofasubcarriers that PRB pair is answered is as the interference matrix on the t easet ofasubcarriers answered in the PRB pair.
Mode two, if data symbol is interfered on the t easet ofasubcarriers that continuous N number of PRB pair is answered, N is not less than 2
Integer, two be that the data symbol determines interference matrix on the t easet ofasubcarriers that this N number of PRB pair is answered as follows：
Determine the son of the received signal strength maximum in the t easet ofasubcarriers that above-mentioned N number of PRB pair is answered on the data symbol
Carrier wave；
Determine that interference matrix that each PRB pair in this N number of PRB is answered as the OFDM symbol carries according to the reception signal
The interference matrix that ripple collection closes.
Mode three, if continuous N data symbol is interfered on the t easet ofasubcarriers that same PRB pair is answered, M is not
Integer less than 2, three determine the interference on the t easet ofasubcarriers that the PRB pair is answered for this M data symbol as follows
Matrix：
Determine in the t easet ofasubcarriers that the PRB pair is answered, the maximum son of the received signal strength on above-mentioned M data symbol
Carrier wave；
Determine interference matrix as this M data symbol on the t easet ofasubcarriers that the PRB pair is answered according to the reception signal
Interference matrix.
Based on above-mentioned any means embodiment, there is what the PRB pair of interference matrix was answered thereon for no OFDM symbol
T easet ofasubcarriers, AF panel is carried out by maximum-ratio combing to data symbol thereon.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of interference rejection unit, including：
Disturb judge module, the t easet ofasubcarriers that each OFDM symbol for determining current time slots is answered in each PRB pair
On whether be interfered；
Interference matrix determining module, for determining what is answered in each PRB pair where interference for the OFDM symbol that is disturbed
Interference matrix on t easet ofasubcarriers；
AF panel processing module, for being every according to the interference matrix on the t easet ofasubcarriers that each disturbed PRB pair is answered
The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers that individual disturbed PRB pair is answered carries out AF panel, and disturbed PRB pair should
T easet ofasubcarriers be t easet ofasubcarriers that the PRB pair where the interference for the OFDM symbol being disturbed is answered, the son that disturbed PRB pair is answered
Interference matrix in carrier set is interference matrix of the OFDM symbol being disturbed on the t easet ofasubcarriers.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
It is preferred that AF panel processing module is specifically used for：
It is used to transmitting the OFDM symbol of pilot signal according to the disturbed PRB pair of the first kind on the t easet ofasubcarriers answered described the
The interference matrix on t easet ofasubcarriers that a kind of disturbed PRB pair is answered, is merged to the disturbed PRB pair of the first kind by AF panel
The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered carries out AF panel, and the disturbed PRB pair of the first kind should
T easet ofasubcarriers be used only for transmit pilot signal OFDM symbol the subcarrier that the PRB pair of interference matrix is answered thereon be present
Set；
It is used to transmitting the OFDM symbol of pilot signal according to the disturbed PRB pair of the second class on the t easet ofasubcarriers answered described the
On the t easet ofasubcarriers that the interference matrix and the disturbed PRB pair of the second class that the disturbed PRB pair of two classes is answered on t easet ofasubcarriers are answered
For transmitting interference matrix of the OFDM symbol of data-signal on the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered, lead to
The OFDM symbol for being used to transmit data-signal is crossed on the t easet ofasubcarriers that AF panel merging is answered the disturbed PRB pair of the second class
Carry out AF panel, the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered be for transmit pilot signal OFDM symbol and
The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol for transmitting data-signal；
It is used to transmitting the OFDM symbol of data-signal according to the 3rd disturbed PRB pair of class on the t easet ofasubcarriers answered described the
The interference matrix on t easet ofasubcarriers that the disturbed PRB pair of three classes is answered, merged by AF panel to the disturbed PRB pair of the 3rd class
The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered carries out AF panel, and the disturbed PRB pair of the 3rd class should
T easet ofasubcarriers be used only for transmit data-signal OFDM symbol the subcarrier that the PRB pair of interference matrix is answered thereon be present
Set.
It is preferred that the interference matrix determining module is to be disturbed for transmitting data-signal as follows
OFDM symbol determines the interference matrix on the t easet ofasubcarriers that a PRB pair where interference is answered：
It is determined that in the t easet ofasubcarriers that the PRB pair where interference is answered, believe in the data that are used to transmit being disturbed
Number OFDM symbol on the maximum subcarrier of received signal strength；
It is the use being disturbed according to the reception signal if the intensity of the reception signal is more than the threshold value of setting
The interference matrix on the t easet ofasubcarriers that the PRB pair is answered is determined in the OFDM symbol of transmission data-signal；
If the intensity of the reception signal no more than setting threshold value, by it is described be disturbed be used for transmit data-signal
Interference matrix of the OFDM symbol on the t easet ofasubcarriers that the disturbed PRB pair adjacent with the PRB is answered be used as in the PRB pair
The interference matrix on t easet ofasubcarriers answered.
If it is preferred that for transmit the OFDM symbol of data-signal on the t easet ofasubcarriers that continuous N number of PRB pair is answered by
To interference, the N is the integer not less than 2, and the interference matrix determining module is true for the OFDM symbol as follows
The interference matrix being scheduled on the t easet ofasubcarriers that N number of PRB pair is answered：
Determine the received signal strength maximum in the t easet ofasubcarriers that N number of PRB pair is answered in the OFDM symbol
Subcarrier；
Determining interference matrix according to the reception signal, each PRB pair in N number of PRB is answered as the OFDM symbol
T easet ofasubcarriers on interference matrix.
It is preferred that if continuous N is used to transmit the subcarrier collection that the OFDM symbol of data-signal is answered in same PRB pair
Close and be interfered, the M is the integer not less than 2, and the interference matrix determining module is as follows the M
OFDM symbol determines the interference matrix on the t easet ofasubcarriers that the PRB pair is answered：
Determine in the t easet ofasubcarriers that the PRB pair is answered, the received signal strength maximum in the M OFDM symbol
Subcarrier；
The subcarrier that interference matrix answers as the M OFDM symbol in the PRB pair is determined according to the reception signal
Collect the interference matrix closed.
Based on above-mentioned any device embodiment, it is preferred that the AF panel processing module is additionally operable to：
The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon for no OFDM symbol be present, should to the PRB pair
T easet ofasubcarriers on be used to transmitting the OFDM symbol of data-signal AF panel carried out by maximum-ratio combing.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, and the base station includes processor
And memory.
The processor is configured as performing the computer program for possessing following function：Determine that the OFDM symbol of current time slots exists
Whether it is interfered on the t easet ofasubcarriers that each PRB pair is answered；Pilot signal or data-signal are transmitted for being used for of being disturbed
OFDM symbol determines the interference matrix on the t easet ofasubcarriers that each PRB pair where interference is answered；According to each disturbed PRB pair
The interference matrix on t easet ofasubcarriers answered, it is used to transmit data-signal on the t easet ofasubcarriers answered for each disturbed PRB pair
OFDM symbol carries out AF panel, and the t easet ofasubcarriers that disturbed PRB pair is answered are the PRB where the interference for the OFDM symbol being disturbed
Corresponding t easet ofasubcarriers, the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered are the OFDM symbol being disturbed described
Interference matrix on t easet ofasubcarriers.
The memory is configured as preserving the code of above computer program.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Brief description of the drawings
Fig. 1 is the method flow diagram that one embodiment of the invention provides；
Fig. 2 is the method flow diagram that another embodiment of the present invention provides；
Fig. 3 be one embodiment of the invention scene in present sub-frame first time slot each OFDM symbol frequency domain
Oscillogram；
Fig. 4 is the planisphere after being demodulated in first OFDM symbol in the scene using the balanced detection algorithm of tradition；
Fig. 5 is the planisphere after being demodulated in second OFDM symbol in the scene using the balanced detection algorithm of tradition；
Fig. 6 is the planisphere after being demodulated in the 3rd OFDM symbol in the scene using the balanced detection algorithm of tradition；
Fig. 7 is that the star after balanced detection demodulation is carried out using the embodiment of the present invention in first OFDM symbol in the scene
Seat figure；
Fig. 8 is that the star after balanced detection demodulation is carried out using the embodiment of the present invention in second OFDM symbol in the scene
Seat figure；
Fig. 9 is that the star after balanced detection demodulation is carried out using the embodiment of the present invention in the 3rd OFDM symbol in the scene
Seat figure；
Figure 10 is a kind of interference rejection unit schematic diagram provided in an embodiment of the present invention；
Figure 11 is a kind of base station schematic diagram provided in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme provided in an embodiment of the present invention is described in detail.
As shown in figure 1, disturbance restraining method provided in an embodiment of the present invention specifically includes following operation：
Step 100, determine each OFDM symbols of current time slots on the t easet ofasubcarriers that each PRB pair is answered whether by
Interference.
Each time slot includes frequency pilot sign and the class OFDM symbol of data symbol two.
Whether OFDM symbol is interfered on the t easet ofasubcarriers that a PRB pair is answered, and refers to what the OFDM symbol limited
With the presence or absence of interference on the frequency domain position that the t easet ofasubcarriers that time-domain position and the PRB pair are answered limit.
Step 110, the OFDM symbol to be disturbed determine the t easet ofasubcarriers answered in each PRB pair where interference respectively
On interference matrix.
The interference matrix on t easet ofasubcarriers that each disturbed PRB pair of step 120, basis is answered, should for each disturbed PRB pair
T easet ofasubcarriers on be used for transmit data-signal OFDM symbol carry out AF panel.
Wherein, the t easet ofasubcarriers that disturbed PRB pair is answered are the son that the PRB pair where the interference for the OFDM symbol being disturbed is answered
Carrier set.
Wherein, the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered is the OFDM symbol being disturbed in the subcarrier
Collect the interference matrix closed.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
In the embodiment of the present invention, for the frequency pilot sign being disturbed, the traditional interference matrix calculating sides of IRC can be used
Method.For the data symbol being disturbed, the determination mode of its interference matrix has a variety of, enumerates below wherein several：
Mode one, it can be determined with as follows one data symbol to be disturbed in a PRB pair where interference
The interference matrix on t easet ofasubcarriers answered：
It is determined that in the t easet ofasubcarriers that the PRB pair where interference is answered, the received signal strength on the data symbol is most
Big subcarrier；
It is that the data symbol is determined at this according to the reception signal if the intensity of the reception signal is more than the threshold value of setting
The interference matrix on t easet ofasubcarriers that PRB pair is answered；
If threshold value of the intensity of the reception signal no more than setting, by the data symbol adjacent with the PRB disturbed
The interference matrix on t easet ofasubcarriers that PRB pair is answered is as the interference matrix on the t easet ofasubcarriers answered in the PRB pair.
Wherein, the intensity of reception signal can be embodied by the amplitude of reception signal, can also connecing by reception signal
Receive power to embody, the intensity of reception signal can also be embodied by other specification, this is not limited by the present invention.
Wherein, the specific value of above-mentioned threshold value can determine as needed in actual application, can also be by imitative
Really it is determined, the embodiment of the present invention is not construed as limiting to the determination mode of above-mentioned threshold value and its specific value.
Wherein, it is that the data symbol determines the interference square on the t easet ofasubcarriers that the PRB pair is answered according to the reception signal
Battle array specific implementation can with but be not limited only to be：
Mode two, if data symbol is interfered on the t easet ofasubcarriers that continuous N number of PRB pair is answered, according to such as lower section
Formula two is that the data symbol determines the interference matrix on the t easet ofasubcarriers that this N number of PRB pair is answered：
Determine the son of the received signal strength maximum in the t easet ofasubcarriers that above-mentioned N number of PRB pair is answered on the data symbol
Carrier wave；
Determine that interference matrix that each PRB pair in this N number of PRB is answered as the OFDM symbol carries according to the reception signal
The interference matrix that ripple collection closes.
Wherein, N is the integer not less than 2.
Mode three, if continuous N data symbol is interfered on the t easet ofasubcarriers that same PRB pair is answered, according to
Following manner three determines the interference matrix on the t easet ofasubcarriers that the PRB pair is answered for this M data symbol：
Determine in the t easet ofasubcarriers that the PRB pair is answered, the maximum son of the received signal strength on above-mentioned M data symbol
Carrier wave；
Determine interference matrix as this M data symbol on the t easet ofasubcarriers that the PRB pair is answered according to the reception signal
Interference matrix.
Wherein, M is the integer not less than 2.
Based on above-mentioned any means embodiment, it is preferred that the interference on the t easet ofasubcarriers answered according to each disturbed PRB pair
Matrix, the data symbol on t easet ofasubcarriers answered for each disturbed PRB pair carry out AF panel, can with but be not limited only to pass through
Following manner is realized：
Frequency pilot sign carries in the son that the disturbed PRB pair of the first kind is answered on the t easet ofasubcarriers answered according to the disturbed PRB pair of the first kind
The interference matrix that ripple collection closes, the data symbol on t easet ofasubcarriers answered by IRC the disturbed PRB pair of the first kind disturb
Suppress；Wherein, the PRB pair of interference matrix thereon for only frequency pilot sign be present in the t easet ofasubcarriers that the disturbed PRB pair of the first kind is answered
The t easet ofasubcarriers answered；
The son that the frequency pilot sign on t easet ofasubcarriers answered according to the disturbed PRB pair of the second class is answered in the disturbed PRB pair of the second class
The data symbol on t easet ofasubcarriers that interference matrix and the disturbed PRB pair of the second class in carrier set are answered is disturbed in the second class
The interference matrix on t easet ofasubcarriers that PRB pair is answered, the number on t easet ofasubcarriers answered by IRC the disturbed PRB pair of the second class
AF panel is carried out according to symbol；The t easet ofasubcarriers that the disturbed PRB pair of second class is answered are frequency pilot sign and data symbol thereon
The t easet ofasubcarriers that the PRB pair of interference matrix is answered be present；
The son that the data symbol on t easet ofasubcarriers answered according to the 3rd disturbed PRB pair of class is answered in the 3rd disturbed PRB pair of class
Interference matrix in carrier set, the data symbol on t easet ofasubcarriers answered by IRC the 3rd disturbed PRB pair of class are done
Disturb suppression；The t easet ofasubcarriers that the 3rd disturbed PRB pair of class is answered are that the PRB pair that only data symbol has interference matrix thereon is answered
T easet ofasubcarriers.
Wherein, if on the t easet ofasubcarriers that a PRB pair is answered existing data symbol interference matrix, have frequency pilot sign again
Interference matrix, the interference square that technical scheme provided in an embodiment of the present invention can be according to this two classes symbol on the t easet ofasubcarriers
Battle array, is suppressed by way of IRC to interference of the data symbol on the t easet ofasubcarriers, due to consideration that data symbol
Interference characteristic, therefore can effectively suppress the interference on data symbol.If only counted on the t easet ofasubcarriers that a PRB pair is answered
According to the interference matrix of symbol, existing scheme will not carry out AF panel to it, and technical scheme provided in an embodiment of the present invention
AF panel can be carried out according to its interference characteristic to this kind of data symbol.If on the t easet ofasubcarriers that a PRB pair is answered only
The interference matrix of frequency pilot sign, the interference characteristic that the interference matrix can reflect on corresponding data symbol, therefore use pilot tone
Interference matrix on symbol just can effectively suppress the interference on data symbol.
Based on above-mentioned any means embodiment, there is what the PRB pair of interference matrix was answered thereon for no OFDM symbol
T easet ofasubcarriers, maximum-ratio combing (Maximum Padio Conbining, maximum-ratio combing) is passed through to data symbol thereon
Carry out AF panel.
Technical scheme provided in an embodiment of the present invention is applied to suppress the uplink interference of LTE system, especially suitable
Disturbed in suppressing different system arrowband.
With reference to Fig. 2, method provided in an embodiment of the present invention is described in detail.
Wherein, base station receives base band time-domain symbol (i.e. OFDM symbol), after removing cyclic prefix to time-domain symbol, passes through FFT
Become time-domain symbol of changing commanders and transform to frequency domain.
The symbol up-converted into each subframe on frequency domain, is analyzed and AF panel as follows：
Judge respectively on the t easet ofasubcarriers that each frequency pilot sign and data symbol each PRB pair of time slot where it are answered
Whether it is interfered.
For frequency pilot sign, whether thresholding V is exceeded according to the IOT values of calculating on the t easet ofasubcarriers that each PRB pair is answered0
To judge whether to be interfered.
For frequency pilot sign, interference refers to that adjacent area interference and/or different system interference, wherein IOT are defined as noise and done
Disturb the ratio that value is made an uproar the bottom of with.
Assuming that reception signal Y of the frequency pilot sign on current PRB i-th of subcarrieri=Hisi+Ii。HiIt is 8 × 1 letter
Road matrix, siIt is frequency pilot sign on i-th of subcarrier, IiIt is interference symbol.
Wherein noise jamming is estimated It is channel estimation results.
IOT=mean (diag (R))/P_noise
Wherein diag expressions take diagonal element to matrix, and P_noise is that equipment bottom is made an uproar.
If IOT ＞ V0, then frequency pilot sign on the t easet ofasubcarriers that current PRB pair is answered by adjacent area interference and/or it is different
System interference, otherwise, frequency pilot sign are not interfered on the t easet ofasubcarriers that current PRB pair is answered.
For example, the IOT values that frequency pilot sign is calculated on the t easet ofasubcarriers that each PRB pair is answered are between 1~2,
V0More than 2, then judge that current pilot symbol is not interfered on the t easet ofasubcarriers that all PRB pairs are answered, only bottom is made an uproar.
To data symbol, its interference being subject to is different system interference.
It is a kind of to judge data symbol with the presence or absence of interference because different system interference characteristic shows as narrow high strength interference
Method is：Calculate received signal strength average (i.e. preceding user equipment of the data symbol on the t easet ofasubcarriers that each PRB pair is answered
The Symbol average amplitude distributed on each PRB), then remove the PRB where the subcarrier of top n maximum received signal strength,
The mean intensity for the reception signal on t easet ofasubcarriers that remaining all PRB pairs are answered is averaged again, judges to carry per height
Whether the intensity of reception signal and the ratio of the average value exceed thresholding V on ripple1.If it exceeds then judge data symbol current
Subcarrier is interfered, and the PRB where recording current sub-carrier is disturbed PRB.Otherwise it is assumed that it is not interfered.
Assuming that data symbol is r in i-th of PRB j-th of subcarrier reception signalj, its amplitude (i.e. signal intensity) bj=
abs(rj)。
Data symbol Symbol average amplitude on i-th of PRB t easet ofasubcarriersWherein j=(i-1) * 12:
i*12。
It is rightSort from big to small, find out top n maximum amplitude value (N values desirable 1~5), and remove, to remaining
It is averaged, obtains again
Then calculate data symbol reception symbol amplitude on each subcarrier withRatio, if ratio exceedes door
Limit V1, the PRB where just recording current sub-carrier is disturbed PRB, otherwise it is assumed that not being interfered.
In the present embodiment, it is assumed that the t easet ofasubcarriers that the first three data symbol of present sub-frame is answered at least one PRB pair
On detect interference, rear nine data symbols do not detect interference, then enter rower to the disturbed PRB of first three data symbol
Know.
For each frequency pilot sign and data symbol being interfered, determine what it was answered in the PRB pair where interference respectively
Interference matrix on t easet ofasubcarriers.
For frequency pilot sign, its interference matrix is properly termed as the first interference matrix.
The calculation of first interference matrix is as follows：
Assuming that reception symbol Y of the frequency pilot sign on a PRB that interference be present i-th of subcarrieri=Hisi+Ii。Hi
It is 8 × 1 channel matrix, siIt is symbol of the frequency pilot sign on i-th of subcarrier.IiIt is interference symbol.
Wherein, noise jamming is estimatedIt is channel estimation results.Frequency pilot sign is in the PRB
The first interference matrix on corresponding t easet ofasubcarriersIt is not disturbed thereon for frequency pilot sign
PRB, the first interference matrix identify invalid and are properly termed as the second interference matrix for data symbol, its interference matrix.
On it different system interference data symbol be present, reception is picked out on a PRB where the interference from data symbol
The maximum subcarrier of signal intensity (thinks that the interference magnitude on the subcarrier is maximum), if the intensity of the reception signal with it is above-mentioned
The ratio of the averaged amplitude value of determination exceedes a certain threshold value V2, just calculate the second interference matrix with the reception signal.
Specifically, assume the reception signal Y on the above-mentioned PRB of selection subcarrierimax=Hisi+Ii。HiIt is 8 × 1 letter
Road matrix, siIt is symbol of the data symbol on i-th of subcarrier, IiIt is interference symbol.
Second interference matrix R of the data symbol on the t easet ofasubcarriers that above-mentioned PRB pair is answered2=E [(Yimax)(Yimax)H]。
If the ratio of the intensity of above-mentioned reception signal and the averaged amplitude value of above-mentioned determination is not above V2, phase can be used
The second interference matrix calculated on adjacent disturbed PRB, as the second interference matrix on the PRB.Wherein, adjacent PRB refers in frequency
Adjacent PRB on domain.If data symbol is not interfered on the adjacent PRB of the PRB, can not calculate in the PRB pair
The second interference matrix on the t easet ofasubcarriers answered, the second interference square calculated on frequency domain on immediate PRB can also be used
Battle array can also use other modes to calculate the second interference matrix as the second interference matrix on the PRB.If adjacent two
PRB is interfered, then can select one of PRB the second interference matrix.
If data symbol, by different system interference, can also share maximum interference on all disturbed PRB on continuous several PRB
The second interference matrix that subcarrier calculates.Its specific implementation is referred to above-mentioned processing procedure, specifically, first determining whether most
Whether the received signal strength in big interfering sub-carrier exceedes the threshold value of setting, if it does, being calculated according to the reception signal dry
Matrix is disturbed, if not less than the interference matrix on these PRB can not be calculated.
If continuous several data symbols can be shared on these data symbols by different system interference on same PRB
The second interference matrix that maximum interference subcarrier calculates.Its specific implementation is referred to above-mentioned processing procedure, specifically, first
First judge whether the received signal strength on maximum interference subcarrier exceedes the threshold value of setting, if it does, believing according to the reception
Number interference matrix is calculated, if not less than the interference matrix on these PRB can not be calculated.
For on data symbol judge by different system interference PRB and without calculating the second interference matrix PRB,
Second interference matrix mark is invalid.
According to the first interference matrix and the second interference matrix, determine that final balanced detection uses IRC or MRC.
If there is the first interference matrix in the frequency pilot sign in PRB where the interference of data symbol, and count on the PRB
The second interference matrix is not present on the PRB according to symbol, then the data symbol uses IRC in the balanced detection of the PRB, and uses
Interference matrix R=R1；
If the first interference matrix is not present in the frequency pilot sign in PRB where the interference of data symbol on the PRB, and
There is the second interference matrix in data symbol, then the data symbol uses IRC in the balanced detection of the PRB, and uses on the PRB
Interference matrix R=R2；
If there are the first interference matrix, data in the frequency pilot sign in PRB where the interference of data symbol on the PRB
There is the second interference matrix in symbol, then the data symbol uses IRC in the balanced detection of the PRB, and uses dry on the PRB
Disturb matrix R=R1+R2；
If the first interference matrix is not present in the frequency pilot sign in PRB where the interference of data symbol on the PRB, number
The second interference matrix is also not present on the PRB according to symbol, then the data symbol uses MRC in the balanced detection of the PRB.
On present sub-frame shown in frequency-domain waveform Fig. 3 of each OFDM symbol of first time slot.Wherein, first three OFDM is accorded with
Number GSM Intermodulation Interferences substantially are received, there is obvious peak value to occur.4th OFDM symbol is pilot symbol distribution waveform.Adopt
It can accurately be detected with technical scheme provided in an embodiment of the present invention and disturb and carry out AF panel.
Fig. 4 to Fig. 6 is after being demodulated on the first three data symbol being disturbed using traditional balanced detection algorithm respectively
Planisphere.Due to not being interfered in pilot tone, acquiescence is detected using MRC.But first three symbol is disturbed by GSM, therefore
The planisphere of first three symbol is more mixed and disorderly.
Fig. 7 to Fig. 9 using the embodiment of the present invention to carrying out balanced detection algorithm demodulation on first three data symbol after
Planisphere, from figure, the planisphere of first three data symbol being disturbed has obvious improvement.Illustrate to use this programme,
It in the case of high interference, can also planisphere is significantly improved, improve systematic function.
The embodiment of the present invention carries out interference elimination from physical layer algorithm angle, by being optimized to traditional IRC matrixes,
It is allowed to more carry out AF panel for the characteristic of GSM interference, in terms of simulation result, systematic function can be improved to a certain extent.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of interference rejection unit, such as Figure 10 institutes
Show, the device includes：
Disturb judge module 101, the subcarrier collection that each OFDM symbol for determining current time slots is answered in each PRB pair
Close and whether be interfered；
Interference matrix determining module 102, for determined for the OFDM symbol that is disturbed should in each PRB pair where interference
T easet ofasubcarriers on interference matrix；
AF panel processing module 103, the interference matrix on t easet ofasubcarriers answered for each disturbed PRB pair of basis,
The OFDM symbol for being used to transmit data-signal for each disturbed PRB pair on the t easet ofasubcarriers answered carries out AF panel, disturbed PRB
Corresponding t easet ofasubcarriers are the t easet ofasubcarriers that the PRB pair where the interference for the OFDM symbol being disturbed is answered, and disturbed PRB pair should
T easet ofasubcarriers on interference matrix be interference matrix of the OFDM symbol being disturbed on the t easet ofasubcarriers.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
It is preferred that AF panel processing module 103 is specifically used for：
It is used to transmitting the OFDM symbol of pilot signal according to the disturbed PRB pair of the first kind on the t easet ofasubcarriers answered described the
The interference matrix on t easet ofasubcarriers that a kind of disturbed PRB pair is answered, is merged to the disturbed PRB pair of the first kind by AF panel
The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered carries out AF panel, and the disturbed PRB pair of the first kind should
T easet ofasubcarriers be used only for transmit pilot signal OFDM symbol the subcarrier that the PRB pair of interference matrix is answered thereon be present
Set；
It is used to transmitting the OFDM symbol of pilot signal according to the disturbed PRB pair of the second class on the t easet ofasubcarriers answered described the
On the t easet ofasubcarriers that the interference matrix and the disturbed PRB pair of the second class that the disturbed PRB pair of two classes is answered on t easet ofasubcarriers are answered
For transmitting interference matrix of the OFDM symbol of data-signal on the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered, lead to
The OFDM symbol for being used to transmit data-signal is crossed on the t easet ofasubcarriers that AF panel merging is answered the disturbed PRB pair of the second class
Carry out AF panel, the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered be for transmit pilot signal OFDM symbol and
The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol for transmitting data-signal；
It is used to transmitting the OFDM symbol of data-signal according to the 3rd disturbed PRB pair of class on the t easet ofasubcarriers answered described the
The interference matrix on t easet ofasubcarriers that the disturbed PRB pair of three classes is answered, merged by AF panel to the disturbed PRB pair of the 3rd class
The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered carries out AF panel, and the disturbed PRB pair of the 3rd class should
T easet ofasubcarriers be used only for transmit data-signal OFDM symbol the subcarrier that the PRB pair of interference matrix is answered thereon be present
Set.
It is preferred that the interference matrix determining module 102 is to be disturbed for transmitting data-signal as follows
OFDM symbol determine interference matrix on the t easet ofasubcarriers that a PRB pair where interference is answered：
It is determined that in the t easet ofasubcarriers that the PRB pair where interference is answered, believe in the data that are used to transmit being disturbed
Number OFDM symbol on the maximum subcarrier of received signal strength；
It is the use being disturbed according to the reception signal if the intensity of the reception signal is more than the threshold value of setting
The interference matrix on the t easet ofasubcarriers that the PRB pair is answered is determined in the OFDM symbol of transmission data-signal；
If the intensity of the reception signal no more than setting threshold value, by it is described be disturbed be used for transmit data-signal
Interference matrix of the OFDM symbol on the t easet ofasubcarriers that the PRB pair adjacent with the PRB is answered as being answered in the PRB pair
Interference matrix on t easet ofasubcarriers.
If it is preferred that for transmit the OFDM symbol of data-signal on the t easet ofasubcarriers that continuous N number of PRB pair is answered by
To interference, the N is the integer not less than 2, and the interference matrix determining module 102 is the OFDM symbol as follows
It is determined that the interference matrix on the t easet ofasubcarriers that N number of PRB pair is answered：
Determine the received signal strength maximum in the t easet ofasubcarriers that N number of PRB pair is answered in the OFDM symbol
Subcarrier；
Determining interference matrix according to the reception signal, each PRB pair in N number of PRB is answered as the OFDM symbol
T easet ofasubcarriers on interference matrix.
It is preferred that if continuous N is used to transmit the subcarrier collection that the OFDM symbol of data-signal is answered in same PRB pair
Close and be interfered, the M is the integer not less than 2, and the interference matrix determining module 102 is the M as follows
Individual OFDM symbol determines the interference matrix on the t easet ofasubcarriers that the PRB pair is answered：
Determine in the t easet ofasubcarriers that the PRB pair is answered, the received signal strength maximum in the M OFDM symbol
Subcarrier；
The subcarrier that interference matrix answers as the M OFDM symbol in the PRB pair is determined according to the reception signal
Collect the interference matrix closed.
Based on above-mentioned any device embodiment, it is preferred that the AF panel processing module 103 is additionally operable to：
The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon for no OFDM symbol be present, should to the PRB pair
T easet ofasubcarriers on be used to transmitting the OFDM symbol of data-signal AF panel carried out by maximum-ratio combing.
The interference rejection unit that the embodiments of the present invention provide can be base station or the work(being built in base station
Can module.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, as shown in figure 11, the base station
Including processor 111 and memory 112.
The processor 111 is configured as performing the computer program for possessing following function：Determine the OFDM symbols of current time slots
Number whether it is interfered on the t easet ofasubcarriers that each PRB pair is answered；It is used to transmit pilot signal or data letter for what is be disturbed
Number OFDM symbol determine interference matrix on the t easet ofasubcarriers that each PRB pair where interference is answered；According to each disturbed
The interference matrix on t easet ofasubcarriers that PRB pair is answered, it is used to transmit data letter on the t easet ofasubcarriers answered for each disturbed PRB pair
Number OFDM symbol carry out AF panel, the t easet ofasubcarriers that disturbed PRB pair is answered be the OFDM symbol being disturbed interference where
The t easet ofasubcarriers answered of PRB pair, the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered is that the OFDM symbol being disturbed exists
Interference matrix on the t easet ofasubcarriers.
The memory 112 is configured as preserving the code of above computer program.
Technical scheme provided in an embodiment of the present invention, phase is determined for each frequency pilot sign and data symbol being disturbed
The interference matrix answered, rather than interference matrix only is determined to the frequency pilot sign being disturbed.It is not only to lead when carrying out AF panel
The interference matrix of frequency symbol and/or data symbol on the t easet ofasubcarriers that same PRB pair is answered is disturbed data symbol
Suppress, due to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Base station in the embodiment of the present invention, can be macro base station, Home eNodeB, micro-base station, relaying etc..
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
- A kind of 1. disturbance restraining method, it is characterised in that including：Determine the t easet ofasubcarriers that each orthogonal frequency division multiplex OFDM symbol of current time slots is answered in each Physical Resource Block PRB pair On whether be interfered；OFDM symbol to be disturbed determines the interference matrix on the t easet ofasubcarriers that each PRB pair where interference is answered；The interference matrix on t easet ofasubcarriers answered according to each disturbed PRB pair, the t easet ofasubcarriers answered for each disturbed PRB pair The upper OFDM symbol for being used to transmit data-signal carries out AF panel, and the t easet ofasubcarriers that disturbed PRB pair is answered are disturbed The t easet ofasubcarriers that PRB pair where the interference of OFDM symbol is answered, the interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered are Interference matrix of the OFDM symbol being disturbed on the t easet ofasubcarriers；Wherein, the OFDM symbol to be disturbed determines the interference square on the t easet ofasubcarriers that each PRB pair where interference is answered Battle array, including：The t easet ofasubcarriers answered for a PRB pair where interference, it is determined that the subcarrier collection that the PRB pair where interference is answered In conjunction, it is described be disturbed for transmit data-signal OFDM symbol on the maximum subcarrier of received signal strength；Such as The intensity of reception signal described in fruit is more than the threshold value of setting, according to the reception signal for it is described be disturbed be used for transmit data The OFDM symbol of signal determines the interference matrix on the t easet ofasubcarriers that the PRB pair is answered；Otherwise, by the use being disturbed In interference matrix of the OFDM symbol on the t easet ofasubcarriers that the disturbed PRB pair adjacent with the PRB is answered of transmission data-signal As the interference matrix on the t easet ofasubcarriers answered in the PRB pair；It is described if be interfered for the OFDM symbol for transmitting data-signal on the t easet ofasubcarriers that continuous N number of PRB pair is answered N is the integer not less than 2, it is determined that the reception signal in the t easet ofasubcarriers that N number of PRB pair is answered in the OFDM symbol The subcarrier of maximum intensity；According to the reception signal determine interference matrix as the OFDM symbol in N number of PRB it is every The interference matrix on t easet ofasubcarriers that individual PRB pair is answered；If the OFDM symbol that continuous N is used to transmit data-signal is on the t easet ofasubcarriers that same PRB pair is answered by dry Disturb, the M is the integer not less than 2, it is determined that in the t easet ofasubcarriers that the PRB pair is answered, in the M OFDM symbol The maximum subcarrier of received signal strength；Determine interference matrix as the M OFDM symbol in institute according to the reception signal State the interference matrix on the t easet ofasubcarriers that PRB pair is answered.
- 2. according to the method for claim 1, it is characterised in that on the t easet ofasubcarriers answered according to each disturbed PRB pair Interference matrix, the OFDM symbol for being used to transmit data-signal for each disturbed PRB pair on the t easet ofasubcarriers answered carry out interference suppression System, including：The OFDM symbol for being used to transmit pilot signal on the t easet ofasubcarriers answered according to the disturbed PRB pair of the first kind is in the first kind The interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered, merge what the disturbed PRB pair of the first kind was answered by AF panel The OFDM symbol for being used to transmit data-signal on t easet ofasubcarriers carries out AF panel, the son that the disturbed PRB pair of the first kind is answered The subcarrier collection that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol that carrier set is used only for transmitting pilot signal Close；The OFDM symbol for being used to transmit pilot signal on the t easet ofasubcarriers answered according to the disturbed PRB pair of the second class is in second class It is used on the t easet ofasubcarriers that the interference matrix and the disturbed PRB pair of the second class that disturbed PRB pair is answered on t easet ofasubcarriers are answered Interference matrix of the OFDM symbol of data-signal on the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered is transmitted, by dry Disturb the OFDM symbol progress for suppressing to merge and being used for transmitting data-signal on the t easet ofasubcarriers answered the disturbed PRB pair of the second class AF panel, the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered are for transmitting the OFDM symbol of pilot signal and being used for The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol of transmission data-signal；The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered according to the 3rd disturbed PRB pair of class is in the 3rd class The interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered, merge what the disturbed PRB pair of the 3rd class was answered by AF panel The OFDM symbol for being used to transmit data-signal on t easet ofasubcarriers carries out AF panel, the son that the disturbed PRB pair of the 3rd class is answered The subcarrier collection that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol that carrier set is used only for transmitting data-signal Close.
- 3. method according to claim 1 or 2, it is characterised in that this method also includes：The t easet ofasubcarriers that the PRB pair of interference matrix is answered, the son answered the PRB pair thereon for no OFDM symbol be present The OFDM symbol for being used to transmit data-signal in carrier set carries out AF panel by maximum-ratio combing.
- A kind of 4. interference rejection unit, it is characterised in that including：Judge module is disturbed, for determining each orthogonal frequency division multiplex OFDM symbol of current time slots in each Physical Resource Block Whether it is interfered on the t easet ofasubcarriers that PRB pair is answered；Interference matrix determining module, the son for determining to answer in each PRB pair where interference for the OFDM symbol that is disturbed carry The interference matrix that ripple collection closes；AF panel processing module, for the interference matrix on the t easet ofasubcarriers answered according to each disturbed PRB pair, for each by Disturb and be used for the OFDM symbol progress AF panel for transmitting data-signal, the son that disturbed PRB pair is answered on the t easet ofasubcarriers that PRB pair is answered Carrier set is the t easet ofasubcarriers that the PRB pair where the interference for the OFDM symbol being disturbed is answered, the subcarrier that disturbed PRB pair is answered It is interference matrix of the OFDM symbol being disturbed on the t easet ofasubcarriers to collect the interference matrix closed；Wherein, the interference matrix determining module is specifically used for：The t easet ofasubcarriers answered for a PRB pair where interference, it is determined that the subcarrier collection that the PRB pair where interference is answered In conjunction, it is described be disturbed for transmit data-signal OFDM symbol on the maximum subcarrier of received signal strength；Such as The intensity of reception signal described in fruit is more than the threshold value of setting, according to the reception signal for it is described be disturbed be used for transmit data The OFDM symbol of signal determines the interference matrix on the t easet ofasubcarriers that the PRB pair is answered；Otherwise, by the use being disturbed In interference matrix of the OFDM symbol on the t easet ofasubcarriers that the disturbed PRB pair adjacent with the PRB is answered of transmission data-signal As the interference matrix on the t easet ofasubcarriers answered in the PRB pair；It is described if be interfered for the OFDM symbol for transmitting data-signal on the t easet ofasubcarriers that continuous N number of PRB pair is answered N is the integer not less than 2, it is determined that the reception signal in the t easet ofasubcarriers that N number of PRB pair is answered in the OFDM symbol The subcarrier of maximum intensity；According to the reception signal determine interference matrix as the OFDM symbol in N number of PRB it is every The interference matrix on t easet ofasubcarriers that individual PRB pair is answered；If the OFDM symbol that continuous N is used to transmit data-signal is on the t easet ofasubcarriers that same PRB pair is answered by dry Disturb, the M is the integer not less than 2, it is determined that in the t easet ofasubcarriers that the PRB pair is answered, in the M OFDM symbol The maximum subcarrier of received signal strength；Determine interference matrix as the M OFDM symbol in institute according to the reception signal State the interference matrix on the t easet ofasubcarriers that PRB pair is answered.
- 5. device according to claim 4, it is characterised in that the AF panel processing module is specifically used for：The OFDM symbol for being used to transmit pilot signal on the t easet ofasubcarriers answered according to the disturbed PRB pair of the first kind is in the first kind The interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered, merge what the disturbed PRB pair of the first kind was answered by AF panel The OFDM symbol for being used to transmit data-signal on t easet ofasubcarriers carries out AF panel, the son that the disturbed PRB pair of the first kind is answered The subcarrier collection that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol that carrier set is used only for transmitting pilot signal Close；The OFDM symbol for being used to transmit pilot signal on the t easet ofasubcarriers answered according to the disturbed PRB pair of the second class is in second class It is used on the t easet ofasubcarriers that the interference matrix and the disturbed PRB pair of the second class that disturbed PRB pair is answered on t easet ofasubcarriers are answered Interference matrix of the OFDM symbol of data-signal on the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered is transmitted, by dry Disturb the OFDM symbol progress for suppressing to merge and being used for transmitting data-signal on the t easet ofasubcarriers answered the disturbed PRB pair of the second class AF panel, the t easet ofasubcarriers that the disturbed PRB pair of the second class is answered are for transmitting the OFDM symbol of pilot signal and being used for The t easet ofasubcarriers that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol of transmission data-signal；The OFDM symbol for being used to transmit data-signal on the t easet ofasubcarriers answered according to the 3rd disturbed PRB pair of class is in the 3rd class The interference matrix on t easet ofasubcarriers that disturbed PRB pair is answered, merge what the disturbed PRB pair of the 3rd class was answered by AF panel The OFDM symbol for being used to transmit data-signal on t easet ofasubcarriers carries out AF panel, the son that the disturbed PRB pair of the 3rd class is answered The subcarrier collection that the PRB pair of interference matrix is answered thereon be present in the OFDM symbol that carrier set is used only for transmitting data-signal Close.
- 6. the device according to claim 4 or 5, it is characterised in that the AF panel processing module is additionally operable to：The t easet ofasubcarriers that the PRB pair of interference matrix is answered, the son answered the PRB pair thereon for no OFDM symbol be present The OFDM symbol for being used to transmit data-signal in carrier set carries out AF panel by maximum-ratio combing.
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| PCT/CN2015/077806 WO2015165403A1 (en) | 2014-04-29 | 2015-04-29 | Interference suppression method and device |
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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 |
| CN105281791B (en) * | 2014-07-24 | 2017-12-01 | 北京信威通信技术股份有限公司 | A kind of interference detection method in OFDM wireless communication systems |
| CN105517169B (en) * | 2014-09-26 | 2019-05-17 | 成都鼎桥通信技术有限公司 | It is a kind of for evading the dispatching method of interference |
| CN111800813B (en) * | 2019-04-08 | 2021-10-29 | 大唐移动通信设备有限公司 | Method and device for detecting narrow-band signal interference |
| CN110113272B (en) * | 2019-05-09 | 2021-08-03 | 广州海格通信集团股份有限公司 | Method and device for suppressing strong narrowband interference, communication equipment and storage medium |
| CN115225436B (en) * | 2021-04-21 | 2023-06-16 | 大唐移动通信设备有限公司 | Interference suppression method, device, equipment and storage medium |
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| CN102970696B (en) * | 2012-12-14 | 2016-01-27 | 上海大唐移动通信设备有限公司 | A kind of frequency optimization method for communication system |
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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 |
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| CN103155502A (en) * | 2010-09-16 | 2013-06-12 | 瑞典爱立信有限公司 | Interferer parameter estimation method and apparatus |
| CN103379048A (en) * | 2012-04-16 | 2013-10-30 | 中兴通讯股份有限公司 | Channel estimation and detection method and base station |
| CN103378883A (en) * | 2012-04-19 | 2013-10-30 | 电信科学技术研究院 | Method and device for equalizing frequency domain under condition of uplink MU-MIMO |
| CN103379055A (en) * | 2012-04-28 | 2013-10-30 | 中兴通讯股份有限公司 | Interference rejection combining method and device |
| CN103701736A (en) * | 2013-12-31 | 2014-04-02 | 大唐移动通信设备有限公司 | Interference inhibiting method and device in LTE (long term evolution) system |
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