CN103916229A - Interference suppression method and device - Google Patents

Interference suppression method and device Download PDF

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Publication number
CN103916229A
CN103916229A CN201410178853.4A CN201410178853A CN103916229A CN 103916229 A CN103916229 A CN 103916229A CN 201410178853 A CN201410178853 A CN 201410178853A CN 103916229 A CN103916229 A CN 103916229A
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prb
subcarrier set
set corresponding
disturbed
ofdm symbol
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CN103916229B (en
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刘昊
任斌
李琼
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to PCT/CN2015/077806 priority patent/WO2015165403A1/en
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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
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses an interference suppression method and device. The method includes the steps that whether each OFDM symbol in the current time slot is in interference on a sub-carrier set corresponding to each PRB or not is determined; an interference matrix on the sub-carrier set corresponding to each PRB where interference of each OFDM symbol in interference is located is determined for each OFDM symbol in interference; according to the interference matrix on the sub-carrier set corresponding to each PRB in interference, interference suppression is performed on data symbols on the sub-carrier set corresponding to each PRB in interference, the sub-carrier set corresponding to each PRB in interference is a sub-carrier set corresponding to the PRB where interference of each OFDM symbol in interference is located, and the interference matrix on the sub-carrier set corresponding to each PRB in interference is an interference matrix of ach OFDM symbol in interference on the sub-carrier set. Because the interference characteristics of the data symbols are taken into consideration, interference in the data symbols can be effectively suppressed.

Description

A kind of disturbance restraining method and device
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of disturbance restraining method and device.
Background technology
Long Term Evolution (Long Term Evolution, LTE) system adopts F-band (1880-1920MHz) substantially, LTE system uplink is several different system interference below this frequency range mainly exists: global system for mobile communications (Global System for Mobile communication, GSM) 900 frequency range second order inter-modulations are disturbed, GSM1800 third order intermodulation is disturbed, the interference that TD SDMA (TD-S) is not introduced by force in F-band block capability, personal handyphone system (Personal Handy-phone System, PHS) network adjacent frequency interference etc.
The up interference at F-band of LTE generally suppresses to merge (Interference Rejection Combining, IRC) by interference and disturbs inhibition.Specifically obtain interference matrix by ascending pilot frequency sign computation, then on upstream data symbol, carry out the balanced detection of IRC according to the interference matrix calculating, obtain weighted value by balanced detection of IRC, and then realize and disturb inhibition.
In a LTE sub-frame of uplink, different system interference is generally arrowband and disturbs, and the interference characteristic on different orthogonal frequency division multiplexing (OFDM) symbol does not have certain rule, the interference characteristic being subject on the interference being subject to once frequency pilot sign and data symbol is inconsistent, cannot obtain the interference matrix of expecting, interference on data symbol is just difficult to suppress, and causes cyclic redundancy (CRC) check errors.
Summary of the invention
The object of this invention is to provide a kind of disturbance restraining method and device, the problem of disturbing inhibition to exist to solve current employing IRC.
The object of the invention is to be achieved through the following technical solutions:
A kind of disturbance restraining method, comprising:
Whether each OFDM symbol of determining current time slots is interfered in subcarrier set corresponding to each Physical Resource Block (PRB);
For the OFDM symbol being disturbed is determined the interference matrix in subcarrier set corresponding to the each PRB that disturbs place;
According to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB.
Wherein, be data symbol for the OFDM symbol of transmission of data signals.
Wherein, the subcarrier set that PRB is corresponding, the set that the subcarrier that PRB comprises forms.For example, existing protocol regulation, PRB comprises 12 subcarriers on frequency domain, and the subcarrier set that PRB is corresponding is exactly the set that 12 subcarriers comprising of this PRB form.
Wherein, the subcarrier set that disturbed PRB is corresponding be disturbed for transmitting the subcarrier set corresponding to PRB at interference place of OFDM symbol of pilot signal or data-signal.
Wherein, the interference matrix in the subcarrier set that disturbed PRB is corresponding is the interference matrix in described subcarrier set for the OFDM symbol that transmits pilot signal or data-signal being disturbed.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Preferably, according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for the data symbol in subcarrier set corresponding to each disturbed PRB disturbs inhibition, can but be not limited only to realize in the following way:
According in subcarrier set corresponding to the disturbed PRB of the first kind for the OFDM symbol (being frequency pilot sign) that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of the first kind, suppress to merge by interference the data symbol in subcarrier set corresponding to the disturbed PRB of the first kind disturbed to inhibition; Wherein, the subcarrier set that the disturbed PRB of the first kind is corresponding is that only frequency pilot sign exists the subcarrier set corresponding to PRB of interference matrix thereon;
The interference matrix of data symbol in subcarrier set corresponding to the interference matrix according to the frequency pilot sign in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind and the disturbed PRB of Equations of The Second Kind in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind, suppresses to merge by interference the data symbol in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind is disturbed to inhibition; The subcarrier set that the disturbed PRB of Equations of The Second Kind is corresponding is subcarrier set corresponding to PRB that frequency pilot sign and data symbol all exist interference matrix thereon;
Interference matrix according to the data symbol in subcarrier set corresponding to the disturbed PRB of the 3rd class in subcarrier set corresponding to the disturbed PRB of the 3rd class, suppresses to merge by interference the data symbol in subcarrier set corresponding to the disturbed PRB of the 3rd class is disturbed to inhibition; The subcarrier set that the disturbed PRB of the 3rd class is corresponding is that only data symbol exists the subcarrier set corresponding to PRB of interference matrix thereon.
Based on above-mentioned any embodiment, determine that for the OFDM symbol being disturbed the mode of the interference matrix in subcarrier set corresponding to the PRB that disturbs place has multiple.Exemplify wherein several below:
Mode one, can be in the following manner one determine the interference matrix in subcarrier set corresponding to a PRB who disturbs place for the data symbol being disturbed:
Determine and disturb in the subcarrier set that this PRB at place is corresponding, the subcarrier of the received signal strength maximum on this data symbol;
If the intensity of this reception signal is greater than the threshold value of setting, be that this data symbol is determined the interference matrix in subcarrier set corresponding to this PRB according to this reception signal;
If the intensity of this reception signal is not more than the threshold value of setting, the interference matrix using this data symbol in subcarrier set corresponding to the disturbed PRB adjacent with this PRB is as the interference matrix in subcarrier set corresponding to this PRB.
Mode two, if data symbol is interfered in subcarrier set corresponding to a N continuous PRB, N is not less than 2 integer, two determine the interference matrix in subcarrier set corresponding to this N PRB for this data symbol in the following manner:
Determine the subcarrier of the received signal strength maximum on this data symbol in the subcarrier set that an above-mentioned N PRB is corresponding;
Determine that according to this reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in this N PRB of this OFDM symbol.
Mode three, if a continuous N data symbol is interfered in subcarrier set corresponding to same PRB, M is not less than 2 integer, three determine the interference matrix in subcarrier set corresponding to this PRB for this M data symbol in the following manner:
Determine in the subcarrier set that this PRB is corresponding the subcarrier of the received signal strength maximum on an above-mentioned M data symbol;
According to this reception signal determine interference matrix as this M data symbol the interference matrix in subcarrier set corresponding to this PRB.
Based on above-mentioned any means embodiment, for there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, the data symbol on it is merged and disturbed inhibition by high specific.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of interference suppression equipment, comprising:
Disturb judge module, whether be interfered in subcarrier set corresponding to each PRB for each OFDM symbol of determining current time slots;
Interference matrix determination module, is used to the OFDM symbol being disturbed to determine the interference matrix in subcarrier set corresponding to the each PRB that disturbs place;
Disturb and suppress processing module, be used for according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Preferably, disturb suppress processing module specifically for:
According in subcarrier set corresponding to the disturbed PRB of the first kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of the described first kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of the described first kind by interference, the subcarrier set that the disturbed PRB of the described first kind is corresponding is subcarrier set corresponding to PRB that only has interference matrix for transmitting the OFDM symbol of pilot signal thereon;
According in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, with in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind by interference, the subcarrier set that the disturbed PRB of described Equations of The Second Kind is corresponding is the OFDM symbol for transmitting pilot signal and subcarrier set corresponding to PRB that all has interference matrix for the OFDM symbol of transmission of data signals thereon,
According in subcarrier set corresponding to the disturbed PRB of the 3rd class for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described the 3rd class, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described the 3rd class by interference, the subcarrier set that the disturbed PRB of described the 3rd class is corresponding is that only the OFDM symbol for transmission of data signals exists the subcarrier set corresponding to PRB of interference matrix thereon.
Preferably, described interference matrix determination module is in the following manner for the OFDM symbol for transmission of data signals being disturbed is determined the interference matrix in subcarrier set corresponding to a PRB who disturbs place:
Determine and disturb in the subcarrier set that the described PRB at place is corresponding, at the described subcarrier for the received signal strength maximum on the OFDM symbol of transmission of data signals being disturbed;
If the intensity of described reception signal is greater than the threshold value of setting, the OFDM symbol for transmission of data signals being disturbed described according to described reception signal being is determined the interference matrix in subcarrier set corresponding to described PRB;
If the intensity of described reception signal is not more than the threshold value of setting, the interference matrix using the described OFDM symbol for transmission of data signals being disturbed in subcarrier set corresponding to the disturbed PRB adjacent with described PRB is as the interference matrix in subcarrier set corresponding to described PRB.
Preferably, if the OFDM symbol for transmission of data signals is interfered in subcarrier set corresponding to a N continuous PRB, described N is not less than 2 integer, and described interference matrix determination module is determined the interference matrix in subcarrier set corresponding to a described N PRB for described OFDM symbol in the following manner:
Determine the subcarrier of the received signal strength maximum on described OFDM symbol in the subcarrier set that a described N PRB is corresponding;
Determine that according to described reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in a described N PRB of described OFDM symbol.
Preferably, if continuous N is interfered in subcarrier set corresponding to same PRB for the OFDM symbol of transmission of data signals, described M is not less than 2 integer, and described interference matrix determination module is determined the interference matrix in subcarrier set corresponding to described PRB for described M OFDM symbol in the following manner:
Determine in the subcarrier set that described PRB is corresponding the subcarrier of the received signal strength maximum on described M OFDM symbol;
According to described reception signal determine interference matrix as described M OFDM symbol the interference matrix in subcarrier set corresponding to described PRB.
Based on above-mentioned any device embodiment, preferably, described interference suppress processing module also for:
For there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, the OFDM symbol for transmission of data signals in subcarrier set corresponding to described PRB is merged and disturbed inhibition by high specific.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, and this base station comprises processor and memory.
This processor is configured to carry out the computer program that possesses following function: whether the OFDM symbol of determining current time slots is interfered in subcarrier set corresponding to each PRB; Determine the interference matrix in subcarrier set corresponding to the each PRB that disturbs place for what be disturbed for transmitting the OFDM symbol of pilot signal or data-signal; According to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
This memory is configured to preserve the code of above-mentioned computer program.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Brief description of the drawings
The method flow diagram that Fig. 1 provides for one embodiment of the invention;
The method flow diagram that Fig. 2 provides for another embodiment of the present invention;
Fig. 3 is the frequency-domain waveform figure of each OFDM symbol of first time slot of current subframe in the scene of one embodiment of the invention;
Fig. 4 adopts the planisphere after traditional balanced detection algorithm demodulation on first OFDM symbol in this scene;
Fig. 5 adopts the planisphere after traditional balanced detection algorithm demodulation on second OFDM symbol in this scene;
Fig. 6 adopts the planisphere after traditional balanced detection algorithm demodulation on the 3rd OFDM symbol in this scene;
Fig. 7 adopts the embodiment of the present invention to carry out the balanced planisphere detecting after demodulation on first OFDM symbol in this scene;
Fig. 8 adopts the embodiment of the present invention to carry out the balanced planisphere detecting after demodulation on second OFDM symbol in this scene;
Fig. 9 adopts the embodiment of the present invention to carry out the balanced planisphere detecting after demodulation on the 3rd OFDM symbol in this scene;
A kind of interference suppression equipment schematic diagram that Figure 10 provides for the embodiment of the present invention;
A kind of base station schematic diagram that Figure 11 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention is provided is elaborated.
As shown in Figure 1, the disturbance restraining method that the embodiment of the present invention provides specifically comprises following operation:
Step 100, determine whether each OFDM symbol of current time slots is interfered in subcarrier set corresponding to each PRB.
Each time slot comprises frequency pilot sign and data symbol two class OFDM symbols.
Whether OFDM symbol is interfered in subcarrier set corresponding to PRB, refers on the frequency domain position that time-domain position that this OFDM symbol limits and subcarrier set corresponding to this PRB limit whether have interference.
Step 110, determine respectively the interference matrix in subcarrier set corresponding to the each PRB that disturbs place for the OFDM symbol that is disturbed.
Step 120, according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB.
Wherein, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed.
Wherein, the interference matrix in the subcarrier set that disturbed PRB is corresponding is the OFDM symbol that the is disturbed interference matrix in this subcarrier set.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered 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, can adopt the interference matrix computational methods that IRC is traditional.For the data symbol being disturbed, definite mode of its interference matrix has multiple, exemplifies wherein several below:
Mode one, can be in the following manner one determine the interference matrix in subcarrier set corresponding to a PRB who disturbs place for the data symbol being disturbed:
Determine and disturb in the subcarrier set that this PRB at place is corresponding, the subcarrier of the received signal strength maximum on this data symbol;
If the intensity of this reception signal is greater than the threshold value of setting, be that this data symbol is determined the interference matrix in subcarrier set corresponding to this PRB according to this reception signal;
If the intensity of this reception signal is not more than the threshold value of setting, the interference matrix using this data symbol in subcarrier set corresponding to the disturbed PRB adjacent with this PRB is as the interference matrix in subcarrier set corresponding to this PRB.
Wherein, the intensity that receives signal can embody by the amplitude that receives signal, also can embody by the received power that receives signal, can also embody the intensity that receives signal by other parameters, and the present invention is not construed as limiting this.
Wherein, the concrete value of above-mentioned threshold value can be determined as required in actual application, also can determine by emulation, and definite mode and the concrete value thereof of the embodiment of the present invention to above-mentioned threshold value is not construed as limiting.
Wherein, according to this reception signal be this data symbol determine the interference matrix in subcarrier set corresponding to this PRB specific implementation can but be not limited only to be:
Mode two, if data symbol is interfered in subcarrier set corresponding to a N continuous PRB, two determine the interference matrix in subcarrier set corresponding to this N PRB for this data symbol in the following manner:
Determine the subcarrier of the received signal strength maximum on this data symbol in the subcarrier set that an above-mentioned N PRB is corresponding;
Determine that according to this reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in this N PRB of this OFDM symbol.
Wherein, N is not less than 2 integer.
Mode three, if a continuous N data symbol is interfered in subcarrier set corresponding to same PRB, three determine the interference matrix in subcarrier set corresponding to this PRB for this M data symbol in the following manner:
Determine in the subcarrier set that this PRB is corresponding the subcarrier of the received signal strength maximum on an above-mentioned M data symbol;
According to this reception signal determine interference matrix as this M data symbol the interference matrix in subcarrier set corresponding to this PRB.
Wherein, M is not less than 2 integer.
Based on above-mentioned any means embodiment, preferably, according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for the data symbol in subcarrier set corresponding to each disturbed PRB disturbs inhibition, can but be not limited only to realize in the following way:
According to the interference matrix of frequency pilot sign in subcarrier set corresponding to the disturbed PRB of the first kind in subcarrier set corresponding to the disturbed PRB of the first kind, by IRC, the data symbol in subcarrier set corresponding to the disturbed PRB of the first kind is disturbed to inhibition; Wherein, the subcarrier set that the disturbed PRB of the first kind is corresponding is that only frequency pilot sign exists the subcarrier set corresponding to PRB of interference matrix thereon;
The interference matrix of data symbol in subcarrier set corresponding to the interference matrix according to the frequency pilot sign in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind and the disturbed PRB of Equations of The Second Kind in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind, disturbs inhibition by IRC to the data symbol in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind; The subcarrier set that the disturbed PRB of Equations of The Second Kind is corresponding is subcarrier set corresponding to PRB that frequency pilot sign and data symbol all exist interference matrix thereon;
Interference matrix according to the data symbol in subcarrier set corresponding to the disturbed PRB of the 3rd class in subcarrier set corresponding to the disturbed PRB of the 3rd class, disturbs inhibition by IRC to the data symbol in subcarrier set corresponding to the disturbed PRB of the 3rd class; The subcarrier set that the disturbed PRB of the 3rd class is corresponding is that only data symbol exists the subcarrier set corresponding to PRB of interference matrix thereon.
Wherein, if the interference matrix of existing data symbol in subcarrier set corresponding to PRB, there is again the interference matrix of frequency pilot sign, the technical scheme that the embodiment of the present invention provides can be according to the interference matrix of this two classes symbol in this subcarrier set, to data symbol, the interference in this subcarrier set suppresses mode by IRC, owing to considering the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.If only there is the interference matrix of data symbol in subcarrier set corresponding to PRB, existing scheme will can not disturbed inhibition to it, and the technical scheme that the embodiment of the present invention provides can be disturbed inhibition according to its interference characteristic to this class data symbol.If only there is the interference matrix of frequency pilot sign in subcarrier set corresponding to PRB, this interference matrix can reflect the interference characteristic on corresponding data symbol, therefore uses the interference matrix on frequency pilot sign just can effectively suppress the interference on data symbol.
Based on above-mentioned any means embodiment, for there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, data symbol on it is merged to (Maximum Padio Conbining, high specific merges) by high specific and disturb inhibition.
The technical scheme that the embodiment of the present invention provides is applicable to the uplink interference of LTE system to suppress, and is particularly useful for suppressing different system arrowband and disturbs.
Below in conjunction with Fig. 2, the method that the embodiment of the present invention is provided is described in detail.
Wherein, base station receives base band time-domain symbol (being OFDM symbol), and time-domain symbol is gone, after Cyclic Prefix, to be converted time-domain symbol is transformed to frequency domain by FFT.
Each subframe is up-converted into the symbol on frequency domain, analyzes in the following manner and disturb inhibition:
Judge respectively whether each frequency pilot sign and data symbol are interfered in subcarrier set corresponding to each PRB of its place time slot.
For frequency pilot sign, in subcarrier set corresponding to each PRB, whether exceed thresholding V according to the IOT value of calculating 0judge whether to be interfered.
For frequency pilot sign, disturb to refer to adjacent area and disturb and/or different system interference, wherein IOT is defined as the ratio of making an uproar noise jamming value and the end.
Suppose the reception signal Y of frequency pilot sign on i the subcarrier of current PRB i=H is i+ I i.H i8 × 1 channel matrix, s ifrequency pilot sign on i subcarrier, I ito disturb symbol.
Wherein noise jamming is estimated it is channel estimation results.
IOT＝mean(diag(R))/P_noise
Wherein diag represents matrix to get diagonal element, and P_noise makes an uproar at the bottom of equipment.
If IOT > is V 0, frequency pilot sign is subject to adjacent area interference and/or different system interference in subcarrier set corresponding to current PRB, otherwise frequency pilot sign is not interfered in subcarrier set corresponding to current PRB.
For example, the IOT value that frequency pilot sign calculates in subcarrier set corresponding to each PRB all between 1～2, V 0be greater than 2, judge that current pilot symbol is not all interfered in subcarrier set corresponding to all PRB, only has the end to make an uproar.
To data symbol, its interference being subject to is different system interference.
Because showing as narrow high strength, different system interference characteristic disturbs, a kind ofly judge whether data symbol exists the method for interference to be: the received signal strength average (Symbol average amplitude before user equipment allocation each PRB on) of calculated data symbol in subcarrier set corresponding to each PRB, then remove the PRB at the subcarrier place of top n maximum received signal strength, the mean intensity of the reception signal in subcarrier set corresponding remaining all PRB is averaged again, judge and on each subcarrier, receive the intensity of signal and whether the ratio of this mean value exceedes thresholding V 1.If exceeded, judge that data symbol is interfered at current subcarrier, and the PRB that records current subcarrier place is disturbed PRB.Otherwise think and be not interfered.
It is r that tentation data symbol receives signal at j the subcarrier of i PRB j, its amplitude (being signal strength signal intensity) b j=abs (r j).
Data symbol is Symbol average amplitude in the subcarrier set of i PRB wherein j=(i-1) * 12:i*12.
Right sequence, finds out top n amplitude peak value (N value desirable 1～5), and removes from big to small, to what be left be averaged again, obtain
Then the receiving symbol amplitude of calculated data symbol on each subcarrier with ratio, if ratio exceedes thresholding V 1, be disturbed PRB with regard to the PRB that records current subcarrier place, otherwise think and be not interfered.
In the present embodiment, suppose that the first three data symbol of current subframe all detects interference in subcarrier set corresponding at least one PRB, rear nine data symbols do not detect interference, the disturbed PRB of first three data symbol are identified.
For the each frequency pilot sign and the data symbol that are interfered, determine respectively its interference matrix in subcarrier set corresponding to the PRB that disturbs place.
For frequency pilot sign, its interference matrix can be called the first interference matrix.
The account form of the first interference matrix is as follows:
Suppose the receiving symbol Y of frequency pilot sign on i the subcarrier of the PRB of an existence interference i=H is i+ I i.H i8 × 1 channel matrix, s ithe symbol of frequency pilot sign on i subcarrier.I ito disturb symbol.
Wherein, noise jamming is estimated it is channel estimation results.First interference matrix of frequency pilot sign in subcarrier set corresponding to this PRB the PRB not being disturbed thereon for frequency pilot sign, the first interference matrix mark is invalid. and for data symbol, its interference matrix can be called the second interference matrix.
Exist on different system interference data symbol, pick out the subcarrier (think interference magnitude maximum) on this subcarrier of received signal strength maximum from a PRB at the interference place of data symbol, if the ratio of the intensity of this reception signal and above-mentioned definite averaged amplitude value exceedes a certain threshold value V 2, just with this reception calculated signals the second interference matrix.
Concrete, suppose the reception signal Y on the subcarrier of above-mentioned PRB of selection imax=H is i+ I i.H i8 × 1 channel matrix, s ithe symbol of this data symbol on i subcarrier, I ito disturb symbol.
The second interference matrix R of data symbol in subcarrier set corresponding to above-mentioned PRB 2=E[(Y imax) (Y imax) h].
If the ratio of the intensity of above-mentioned reception signal and above-mentioned definite averaged amplitude value does not exceed V 2, can adopt upper the second interference matrix calculating of adjacent disturbed PRB, as the second interference matrix on this PRB.Wherein, adjacent PRB refers to PRB adjacent on frequency domain.If data symbol is not interfered on the adjacent PRB of this PRB, can not calculate the second interference matrix in subcarrier set corresponding to this PRB, also can adopt upper the second interference matrix calculating of immediate PRB on frequency domain as the second interference matrix on this PRB, also can adopt other modes to calculate the second interference matrix.If two adjacent PRB are interfered, can select the second interference matrix of one of them PRB.
If data symbol is subject to different system interference on continuous several PRB, also can share the second interference matrix that the upper maximum interference subcarrier of all disturbed PRB calculates.Its specific implementation can be with reference to above-mentioned processing procedure, concrete, first judge whether the received signal strength on maximum interference subcarrier exceedes the threshold value of setting, if exceeded, according to this reception calculated signals interference matrix, if do not exceeded, can not calculate the interference matrix on these PRB.
If the upper continuous several data symbols of same PRB are subject to different system interference, can share the second interference matrix that the maximum interference subcarrier on these data symbols calculates.Its specific implementation can be with reference to above-mentioned processing procedure, concrete, first judge whether the received signal strength on maximum interference subcarrier exceedes the threshold value of setting, if exceeded, according to this reception calculated signals interference matrix, if do not exceeded, can not calculate the interference matrix on these PRB.
Be not subject to the PRB of different system interference and do not calculate the PRB of the second interference matrix for judgement on data symbol, the second interference matrix mark is invalid.
According to the first interference matrix and the second interference matrix, determine that final balanced detection adopts IRC or MRC.
If there is the first interference matrix in the frequency pilot sign in the PRB at the interference place of data symbol on this PRB, and there is not the second interference matrix in data symbol on this PRB, this data symbol detects and adopts IRC and the interference matrix R=R adopting in the equilibrium of this PRB 1;
If there is not the first interference matrix in the frequency pilot sign in the PRB at the interference place of data symbol on this PRB, and there is the second interference matrix in data symbol on this PRB, this data symbol detects and adopts IRC and the interference matrix R=R adopting in the equilibrium of this PRB 2;
If the frequency pilot sign in the PRB at the interference place of data symbol exists the first interference matrix on this PRB, there is the second interference matrix in data symbol on this PRB, and this data symbol detects and adopts IRC and the interference matrix R=R adopting in the equilibrium of this PRB 1+ R 2;
If the frequency pilot sign in the PRB at the interference place of data symbol does not exist the first interference matrix on this PRB, there is not the second interference matrix in data symbol on this PRB yet, and this data symbol detects and adopts MRC in the equilibrium of this PRB.
In current subframe shown in frequency-domain waveform Fig. 3 of each OFDM symbol of first time slot.Wherein, first three OFDM symbol has obviously been subject to GSM Intermodulation Interference, has obvious peak value to occur.The 4th OFDM symbol is pilot symbol distribution waveform.The technical scheme that adopts the embodiment of the present invention to provide can accurately detect disturbs and disturbs inhibition.
Fig. 4 to Fig. 6 is respectively the planisphere adopting on the first three data symbol being disturbed after traditional balanced detection algorithm demodulation.Owing to not being interfered in pilot tone, acquiescence is to adopt MRC to detect.But first three symbol is subject to GSM to be disturbed, and therefore the planisphere of first three symbol is more mixed and disorderly.
Fig. 7 to Fig. 9 adopts the embodiment of the present invention to carrying out the planisphere after balanced detection algorithm demodulation on first three data symbol, and from figure, the planisphere of first three data symbol being disturbed has had obvious improvement.Illustrate and adopt this programme, even in high interference situation, also can make planisphere be significantly improved, improve systematic function.
The embodiment of the present invention is disturbed elimination from physical layer algorithm angle, is optimized by the IRC matrix to traditional, and the characteristic that makes it more to disturb for GSM is disturbed inhibition, from simulation result, can improve to a certain extent systematic function.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of interference suppression equipment, and as shown in figure 10, this device comprises:
Disturb judge module 101, whether be interfered in subcarrier set corresponding to each PRB for each OFDM symbol of determining current time slots;
Interference matrix determination module 102, is used to the OFDM symbol being disturbed to determine the interference matrix in subcarrier set corresponding to the each PRB that disturbs place;
Disturb and suppress processing module 103, be used for according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered the interference characteristic of data symbol, therefore can effectively suppress the interference on data symbol.
Preferably, disturb suppress processing module 103 specifically for:
According in subcarrier set corresponding to the disturbed PRB of the first kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of the described first kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of the described first kind by interference, the subcarrier set that the disturbed PRB of the described first kind is corresponding is subcarrier set corresponding to PRB that only has interference matrix for transmitting the OFDM symbol of pilot signal thereon;
According in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, with in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind by interference, the subcarrier set that the disturbed PRB of described Equations of The Second Kind is corresponding is the OFDM symbol for transmitting pilot signal and subcarrier set corresponding to PRB that all has interference matrix for the OFDM symbol of transmission of data signals thereon,
According in subcarrier set corresponding to the disturbed PRB of the 3rd class for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described the 3rd class, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described the 3rd class by interference, the subcarrier set that the disturbed PRB of described the 3rd class is corresponding is that only the OFDM symbol for transmission of data signals exists the subcarrier set corresponding to PRB of interference matrix thereon.
Preferably, described interference matrix determination module 102 is in the following manner for the OFDM symbol for transmission of data signals being disturbed is determined the interference matrix in subcarrier set corresponding to a PRB who disturbs place:
Determine and disturb in the subcarrier set that the described PRB at place is corresponding, at the described subcarrier for the received signal strength maximum on the OFDM symbol of transmission of data signals being disturbed;
If the intensity of described reception signal is greater than the threshold value of setting, the OFDM symbol for transmission of data signals being disturbed described according to described reception signal being is determined the interference matrix in subcarrier set corresponding to described PRB;
If the intensity of described reception signal is not more than the threshold value of setting, the interference matrix using the described OFDM symbol for transmission of data signals being disturbed in subcarrier set corresponding to the PRB adjacent with described PRB is as the interference matrix in subcarrier set corresponding to described PRB.
Preferably, if the OFDM symbol for transmission of data signals is interfered in subcarrier set corresponding to a N continuous PRB, described N is not less than 2 integer, and described interference matrix determination module 102 is determined the interference matrix in subcarrier set corresponding to a described N PRB for described OFDM symbol in the following manner:
Determine the subcarrier of the received signal strength maximum on described OFDM symbol in the subcarrier set that a described N PRB is corresponding;
Determine that according to described reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in a described N PRB of described OFDM symbol.
Preferably, if continuous N is interfered in subcarrier set corresponding to same PRB for the OFDM symbol of transmission of data signals, described M is not less than 2 integer, and described interference matrix determination module 102 is determined the interference matrix in subcarrier set corresponding to described PRB for described M OFDM symbol in the following manner:
Determine in the subcarrier set that described PRB is corresponding the subcarrier of the received signal strength maximum on described M OFDM symbol;
According to described reception signal determine interference matrix as described M OFDM symbol the interference matrix in subcarrier set corresponding to described PRB.
Based on above-mentioned any device embodiment, preferably, described interference suppress processing module 103 also for:
For there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, the OFDM symbol for transmission of data signals in subcarrier set corresponding to described PRB is merged and disturbed inhibition by high specific.
The interference suppression equipment that the invention described above embodiment provides can be base station, can be also the functional module being built in base station.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of base station, and as shown in figure 11, this base station comprises processor 111 and memory 112.
This processor 111 is configured to carry out the computer program that possesses following function: whether the OFDM symbol of determining current time slots is interfered in subcarrier set corresponding to each PRB; Determine the interference matrix in subcarrier set corresponding to the each PRB that disturbs place for what be disturbed for transmitting the OFDM symbol of pilot signal or data-signal; According to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
This memory 112 is configured to preserve the code of above-mentioned computer program.
The technical scheme that the embodiment of the present invention provides, determines corresponding interference matrix for the each frequency pilot sign being disturbed and data symbol, instead of only the frequency pilot sign being disturbed is determined to interference matrix.In the time disturbing inhibition, not that only frequency pilot sign and/or the interference matrix of data symbol in subcarrier set corresponding to same PRB disturb inhibition to data symbol, owing to having considered 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.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and amendment to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (12)

1. a disturbance restraining method, is characterized in that, comprising:
Whether each orthogonal frequency division multiplex OFDM symbol of determining current time slots is interfered in subcarrier set corresponding to each Physical Resource Block PRB;
For the OFDM symbol being disturbed is determined the interference matrix in subcarrier set corresponding to the each PRB that disturbs place;
According to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
2. method according to claim 1, is characterized in that, according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, comprising:
According in subcarrier set corresponding to the disturbed PRB of the first kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of the described first kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of the described first kind by interference, the subcarrier set that the disturbed PRB of the described first kind is corresponding is subcarrier set corresponding to PRB that only has interference matrix for transmitting the OFDM symbol of pilot signal thereon;
According in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, with in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind by interference, the subcarrier set that the disturbed PRB of described Equations of The Second Kind is corresponding is the OFDM symbol for transmitting pilot signal and subcarrier set corresponding to PRB that all has interference matrix for the OFDM symbol of transmission of data signals thereon,
According in subcarrier set corresponding to the disturbed PRB of the 3rd class for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described the 3rd class, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described the 3rd class by interference, the subcarrier set that the disturbed PRB of described the 3rd class is corresponding is that only the OFDM symbol for transmission of data signals exists the subcarrier set corresponding to PRB of interference matrix thereon.
3. method according to claim 1 and 2, is characterized in that, in the following manner for the OFDM symbol for transmission of data signals being disturbed is determined the interference matrix in subcarrier set corresponding to a PRB who disturbs place:
Determine and disturb in the subcarrier set that the described PRB at place is corresponding, at the described subcarrier for the received signal strength maximum on the OFDM symbol of transmission of data signals being disturbed;
If the intensity of described reception signal is greater than the threshold value of setting, the OFDM symbol for transmission of data signals being disturbed described according to described reception signal being is determined the interference matrix in subcarrier set corresponding to described PRB;
If the intensity of described reception signal is not more than the threshold value of setting, the interference matrix using the described OFDM symbol for transmission of data signals being disturbed in subcarrier set corresponding to the disturbed PRB adjacent with described PRB is as the interference matrix in subcarrier set corresponding to described PRB.
4. method according to claim 1 and 2, it is characterized in that, if the OFDM symbol for transmission of data signals is interfered in subcarrier set corresponding to a N continuous PRB, described N is not less than 2 integer, determines the interference matrix in subcarrier set corresponding to a described N PRB in the following manner for described OFDM symbol:
Determine the subcarrier of the received signal strength maximum on described OFDM symbol in the subcarrier set that a described N PRB is corresponding;
Determine that according to described reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in a described N PRB of described OFDM symbol.
5. method according to claim 1 and 2, it is characterized in that, if continuous N is interfered in subcarrier set corresponding to same PRB for the OFDM symbol of transmission of data signals, described M is not less than 2 integer, determines the interference matrix in subcarrier set corresponding to described PRB in the following manner for described M OFDM symbol:
Determine in the subcarrier set that described PRB is corresponding the subcarrier of the received signal strength maximum on described M OFDM symbol;
According to described reception signal determine interference matrix as described M OFDM symbol the interference matrix in subcarrier set corresponding to described PRB.
6. method according to claim 1 and 2, is characterized in that, the method also comprises:
For there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, the OFDM symbol for transmission of data signals in subcarrier set corresponding to described PRB is merged and disturbed inhibition by high specific.
7. an interference suppression equipment, is characterized in that, comprising:
Disturb judge module, whether be interfered in subcarrier set corresponding to each Physical Resource Block PRB for each orthogonal frequency division multiplex OFDM symbol of determining current time slots;
Interference matrix determination module, is used to the OFDM symbol being disturbed to determine the interference matrix in subcarrier set corresponding to the each PRB that disturbs place;
Disturb and suppress processing module, be used for according to the interference matrix in subcarrier set corresponding to each disturbed PRB, for disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to each disturbed PRB, the subcarrier set that disturbed PRB is corresponding is the subcarrier set corresponding to PRB at the interference place of the OFDM symbol that is disturbed, and the interference matrix in subcarrier set corresponding to disturbed PRB is the OFDM symbol that the is disturbed interference matrix in described subcarrier set.
8. device according to claim 7, is characterized in that, described interference suppress processing module specifically for:
According in subcarrier set corresponding to the disturbed PRB of the first kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of the described first kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of the described first kind by interference, the subcarrier set that the disturbed PRB of the described first kind is corresponding is subcarrier set corresponding to PRB that only has interference matrix for transmitting the OFDM symbol of pilot signal thereon;
According in subcarrier set corresponding to the disturbed PRB of Equations of The Second Kind for the OFDM symbol that transmits pilot signal the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, with in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described Equations of The Second Kind by interference, the subcarrier set that the disturbed PRB of described Equations of The Second Kind is corresponding is the OFDM symbol for transmitting pilot signal and subcarrier set corresponding to PRB that all has interference matrix for the OFDM symbol of transmission of data signals thereon,
According in subcarrier set corresponding to the disturbed PRB of the 3rd class for the OFDM symbol of transmission of data signals the interference matrix in subcarrier set corresponding to the disturbed PRB of described the 3rd class, suppress to merge disturbing inhibition for the OFDM symbol of transmission of data signals in subcarrier set corresponding to the disturbed PRB of described the 3rd class by interference, the subcarrier set that the disturbed PRB of described the 3rd class is corresponding is that only the OFDM symbol for transmission of data signals exists the subcarrier set corresponding to PRB of interference matrix thereon.
9. according to the device described in claim 7 or 8, it is characterized in that, described interference matrix determination module is in the following manner for the OFDM symbol for transmission of data signals being disturbed is determined the interference matrix in subcarrier set corresponding to a PRB who disturbs place:
Determine and disturb in the subcarrier set that the described PRB at place is corresponding, at the described subcarrier for the received signal strength maximum on the OFDM symbol of transmission of data signals being disturbed;
If the intensity of described reception signal is greater than the threshold value of setting, the OFDM symbol for transmission of data signals being disturbed described according to described reception signal being is determined the interference matrix in subcarrier set corresponding to described PRB;
If the intensity of described reception signal is not more than the threshold value of setting, the interference matrix using the described OFDM symbol for transmission of data signals being disturbed in subcarrier set corresponding to the disturbed PRB adjacent with described PRB is as the interference matrix in subcarrier set corresponding to described PRB.
10. according to the device described in claim 7 or 8, it is characterized in that, if the OFDM symbol for transmission of data signals is interfered in subcarrier set corresponding to a N continuous PRB, described N is not less than 2 integer, and described interference matrix determination module is determined the interference matrix in subcarrier set corresponding to a described N PRB for described OFDM symbol in the following manner:
Determine the subcarrier of the received signal strength maximum on described OFDM symbol in the subcarrier set that a described N PRB is corresponding;
Determine that according to described reception signal interference matrix is as the interference matrix in the subcarrier set that each PRB is corresponding in a described N PRB of described OFDM symbol.
11. according to the device described in claim 7 or 8, it is characterized in that, if continuous N is interfered in subcarrier set corresponding to same PRB for the OFDM symbol of transmission of data signals, described M is not less than 2 integer, and described interference matrix determination module is determined the interference matrix in subcarrier set corresponding to described PRB for described M OFDM symbol in the following manner:
Determine in the subcarrier set that described PRB is corresponding the subcarrier of the received signal strength maximum on described M OFDM symbol;
According to described reception signal determine interference matrix as described M OFDM symbol the interference matrix in subcarrier set corresponding to described PRB.
12. according to the device described in claim 7 or 8, it is characterized in that, described interference suppress processing module also for:
For there is no the subcarrier set corresponding to PRB of interference matrix thereon of OFDM symbol, the OFDM symbol for transmission of data signals in subcarrier set corresponding to described PRB is merged and disturbed inhibition by high specific.
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