CN104601311A - Same-frequency interference suppression method and device - Google Patents

Abstract

An embodiment of the invention discloses a same-frequency interference suppression method and device. The method comprises estimating same-frequency interference noise signal second-order statistics Ruu matrixs of resource blocks according to receiving signals at reference signal positions of all the resource blocks in continuous N resource blocks and corresponding channel estimation values to obtain N second-order statistics Ruu matrixes; determining whether the N second-order statistics Ruu matrixes have second-order statistics Ruu matrixes to be corrected, and calculating the average second-order statistics Ruu matrix of the N second-order statistics Ruu matrixes and performing same-frequency interference suppression on the user receipt signals on the basis of the average second-order statistics Ruu matrix. By means of the method and the device, the matching degree of the actual second-order statistics Ruu matrixes for same-frequency interference and the actual same-frequency interference noise signals is improved, and the same-frequency interference is suppressed effectively.

Description

A kind of suppressing method of co-channel interference and device

Technical field

The present invention relates to communication technical field, be specifically related to a kind of suppressing method and device of co-channel interference.

Background technology

At LTE (Long Term Evolution, Long Term Evolution) in system, different user in same community can pass through OFDMA (Orthogonal Frequency Division Multiple Access, OFDM) technology realizes multiple access, to improve the utilance of frequency spectrum resource.But, user in neighbor cell may use identical frequency spectrum resource, when base station sends downlink data, the Received signal strength of a certain intra-cell users can be subject to the interference of the Received signal strength (also known as " co-channel interference signal ") using same spectrum resources user in neighbor cell, this interference is called as CCI (Co-Channel Interference, co-channel interference).The technology solving co-channel interference the most frequently used is IRC (Interference Rejection Combining, AF panel merges) technology, it passes through the second-order statistic R of the co-channel interference noise signal (co-channel interference signal and noise signal) estimated _uumatrix carries out processing to reach the object suppressing co-channel interference to received signal, and in IRC technology, to the second-order statistic R of co-channel interference noise signal _uuthe estimated result of matrix directly affects the performance of IRC technology.

Current, usually by the channel estimation value of the Received signal strength on the reference signal position within the scope of selected time-frequency domain and correspondence to the second-order statistic R of co-channel interference noise signal _uumatrix is estimated, the prerequisite of this method of estimation is that the statistical property of hypothesis co-channel interference noise signal on each reference signal position is identical, but, for the interference scene of some more complicated, the statistical property of co-channel interference noise signal on each reference signal position is not identical, and this makes the second-order statistic R estimated _uumatrix does not mate with actual co-channel interference noise signal, thus effectively cannot suppress co-channel interference.

Summary of the invention

The embodiment of the invention discloses a kind of suppressing method and device of co-channel interference, second-order statistic R can be improved _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

Embodiment of the present invention first aspect discloses a kind of suppressing method of co-channel interference, comprising:

The second-order statistic R of the co-channel interference noise signal of this Resource Block is estimated according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, described N be greater than 1 integer;

Judge described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix;

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate described N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix, and with described first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In the first possible implementation of embodiment of the present invention first aspect, the described N number of second-order statistic R of described judgement _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix comprises:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Calculate the average power of the power in described N number of power except maximum power;

Judge whether described maximum power is greater than the product of described average power and preset first threshold value, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is second-order statistic R corresponding to described maximum power _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described preset first threshold value is greater than zero.

In conjunction with embodiment of the present invention first aspect, in the implementation that the second of embodiment of the present invention first aspect is possible, the described N number of second-order statistic R of described judgement _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix comprises:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Judge whether there is target power in described N number of power, described target power is greater than the product of predetermined power and default Second Threshold, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is the second-order statistic R that in described target power, each power is corresponding _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described default Second Threshold is greater than zero.

In conjunction with the first possible implementation of embodiment of the present invention first aspect or the possible implementation of the second, in the third possible implementation of embodiment of the present invention first aspect, described method also comprises:

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix, and with described second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In conjunction with the implementation that the second of embodiment of the present invention first aspect is possible, in the 4th kind of possible implementation of embodiment of the present invention first aspect, described method also comprises:

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, by the described second-order statistic R needing to revise _uumatrix replaces with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix;

Calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and described replacement _uu3rd averaged second order statistic R of matrix _uumatrix, and with described 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

Embodiment of the present invention second aspect discloses a kind of restraining device of co-channel interference, comprising:

Estimation module, for estimating the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, described N be greater than 1 integer;

Judge module, for judging described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix;

Computing module, for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate described N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix;

AF panel module, for described first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In the first possible implementation of embodiment of the present invention second aspect, described judge module judges described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix is:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Calculate the average power of the power in described N number of power except maximum power;

Judge whether described maximum power is greater than the product of described average power and preset first threshold value, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is second-order statistic R corresponding to described maximum power _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described preset first threshold value is greater than zero.

In conjunction with embodiment of the present invention second aspect, in the implementation that the second of embodiment of the present invention second aspect is possible, described judge module judges described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix is:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Judge whether there is target power in described N number of power, described target power is greater than the product of predetermined power and default Second Threshold, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is the second-order statistic R that in described target power, each power is corresponding _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described default Second Threshold is greater than zero.

In conjunction with the first possible implementation of embodiment of the present invention second aspect or the possible implementation of the second, in the third possible implementation of embodiment of the present invention second aspect, described computing module, also for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix;

Described AF panel module, also for described second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In conjunction with the implementation that the second of embodiment of the present invention second aspect is possible, in the 4th kind of possible implementation of embodiment of the present invention second aspect, described device also comprises replacement module, wherein:

Described replacement module, for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, the described second-order statistic Ruu matrix revised that needs is replaced with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix;

Described computing module, also for calculating described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and described replacement _uu3rd averaged second order statistic R of matrix _uumatrix;

Described AF panel module, also for described 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In the embodiment of the present invention, first the restraining device of co-channel interference estimates the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, wherein, N be greater than 1 integer, then judge above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix, and as above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uuthe averaged second order statistic R of matrix _uumatrix, finally with above-mentioned averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.Visible, implement the N number of second-order statistic R of the embodiment of the present invention by calculating _uuthe averaged second order statistic R of matrix _uumatrix carries out co-channel interference suppression to the Received signal strength of user, improves the second-order statistic R being actually used in co-channel interference and suppressing _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic flow sheet of the suppressing method of a kind of co-channel interference disclosed in the embodiment of the present invention;

Fig. 2 is the schematic flow sheet of the suppressing method of another kind of co-channel interference disclosed in the embodiment of the present invention;

Fig. 3 is the structural representation of the restraining device of a kind of co-channel interference disclosed in the embodiment of the present invention;

Fig. 4 is the structural representation of another kind of co-channel interference restraining device disclosed in the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The embodiment of the invention discloses a kind of suppressing method and device of co-channel interference, the second-order statistic R being actually used in co-channel interference and suppressing can be improved _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.Below be described in detail respectively.

Refer to Fig. 1, Fig. 1 is the schematic flow sheet of the suppressing method of a kind of co-channel interference disclosed in the embodiment of the present invention.Wherein, the method shown in Fig. 1 is applied to be existed in the communication environment of co-channel interference.As shown in Figure 1, the method can comprise the following steps:

S101, estimate the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix.

In the embodiment of the present invention, N be greater than 1 integer.

In the embodiment of the present invention, due to second-order statistic R _uumatrix is a statistic, and therefore, the restraining device of co-channel interference must ensure that enough sample sizes just can accurately to second-order statistic R _uumatrix is estimated, therefore selected time-frequency domain scope is larger, and the sample size of statistics is more, in addition, due to second-order statistic R _uumatrix has reacted the statistical property of co-channel interference noise signal, and the co-channel interference noise signal on different time-frequency domain has different characteristics, therefore selected larger time-frequency domain scope is equivalent to carry out filtering to the co-channel interference noise signal of different qualities, is unfavorable for second-order statistic R like this _uuthe estimation of matrix.Therefore, the time-frequency domain scope that the embodiment of the present invention is selected is a Resource Block, and the second-order statistic R to the co-channel interference noise signal of each Resource Block in a N continuous Resource Block _uumatrix is estimated.

In the embodiment of the present invention, in LTE system, the Received signal strength on reference signal position can represent with formula (1):

y _RS[n]＝H[n]·s _RS[n]+I _interf[n]+N[n]

(1)

＝H[n]·s _RS[n]+U[n]

Wherein, and N _rxfor reception antenna number, s _rSthe reference signal that [n] sends for eNodeB, and H [n] is the channel response (channel estimation value between the transmit port that namely reference signal position is corresponding to reception antenna) between reference signal transmit port to reception antenna, and I _interf[n] is co-channel interference signal, and N [n] is for meeting additive white Gaussian noise, wherein, for the power of additive white Gaussian noise, n is the sequence number of the reference signal received, and by U [n]=I _interf[n]+N [n] is called co-channel interference noise signal (co-channel interference signal and noise signal).For the second-order statistic R of the co-channel interference noise signal of each Resource Block in a N continuous Resource Block _uuthe estimation of matrix can use formula (2):

$R_{\mathrm{uu}}\left(i\right)=\frac{1}{M_i}\underset{m=0}{\overset{M_i-1}{\mathrm{\Σ}}}\left(y_{\mathrm{RS}}\right[m]-H[m]\·s_{\mathrm{RS}})\·{\left(y_{\mathrm{RS}}\right[m]-H[m]\·s_{\mathrm{RS}})}^H---\left(2\right)$

Wherein, i is more than or equal to the integer that 0 is less than or equal to N-1, R _uui () is the second-order statistic R of the co-channel interference noise signal of the i-th+1 Resource Block _uumatrix, M _ibe the number of reference signal in the i-th+1 Resource Block, H [m] is the channel estimation value of the transmit port corresponding with reference signal, y _rS[m] is the Received signal strength on reference signal position, and

S102, judge above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix.

As the optional execution mode of one, the restraining device of co-channel interference judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix can comprise:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Calculate in above-mentioned N number of power except maximum power outside the average power of power

Judge above-mentioned maximum power whether be greater than average power with preset first threshold value Th ₁product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is above-mentioned maximum power corresponding second-order statistic R _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, preset first threshold value Th ₁be greater than zero.

In the embodiment of the present invention, calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix formula (3) can be used:

$P_{R_{\mathrm{uu}}}\left(i\right)=\underset{l=0}{\overset{N_{\mathrm{Rx}}-1}{\mathrm{\Σ}}}{R}_{\mathrm{uu}}\left(i\right)\left[l\right]\left[l\right]---\left(3\right)$

Then $P_{R_{\mathrm{uu}}}^{\max }=\underset{i=\mathrm{0,1},..,N-1}{\max }{P}_{R_{\mathrm{uu}}}\left(i\right),$ And $P_{\mathrm{Ruu}}^{\mathrm{vag}}=\frac{1}{N-1}(\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}{P}_{R_{\mathrm{uu}}}\left(i\right)-P_{\mathrm{Ruu}}^{\max }).$

If then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, if then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix, and the second-order statistic R of this needs correction _uumatrix is above-mentioned maximum power corresponding second-order statistic R _uumatrix, namely when time, the restraining device of co-channel interference can assert above-mentioned maximum power received signal strength on reference signal position on corresponding Resource Block receives the impact of adjacent area imbalance interference.

As the optional execution mode of another kind, the restraining device of co-channel interference judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix can comprise:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Judge whether there is target power in above-mentioned N number of power, wherein, target power is greater than predetermined power P _iNwith default Second Threshold Th ₂product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is the second-order statistic R that in target power, each power is corresponding _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, presets Second Threshold Th ₂be greater than zero.

In the embodiment of the present invention, if there is target power in above-mentioned N number of power, then the restraining device of co-channel interference can assert on the Resource Block that above-mentioned target power is corresponding reference signal position on Received signal strength receive the impact of adjacent area imbalance interference.

In the embodiment of the present invention, predetermined power P _iNcan be the estimated value of public-measurement module to co-channel interference noise power in full bandwidth.

S103, as above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uuthe averaged second order statistic R of matrix _uumatrix.

S104, with above-mentioned averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

The embodiment of the present invention, the restraining device of co-channel interference is with above-mentioned averaged second order statistic R _uumatrix is suppress to comprise according to carrying out co-channel interference to the Received signal strength of user:

Calculate above-mentioned averaged second order statistic R _uuthe cholesky of matrix decomposes, by above-mentioned averaged second order statistic R _uumatrix decomposition is the conjugate transpose L of a lower triangular matrix L and this lower triangular matrix L ^hproduct, then utilize the inverse matrix L of lower triangular matrix L ^-1filtering is carried out to the Received signal strength of user, and formula (4) can be adopted to carry out filtering to the Received signal strength of user:

y _RS[n]＝L ^-1·y _RS[n]＝L ^-1·H[n]·s _RS[n]+L ^-1·U[n]＝H[n]·s _RS[n]+U[n] (4)

And after the operation shown in formula (4), the correlation of U [n] is eliminated, thus reach the effect suppressing co-channel interference noise signal.

In the embodiment of the present invention, first the restraining device of co-channel interference estimates the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, wherein, N is positive integer, then judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix, and as above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uuthe averaged second order statistic R of matrix _uumatrix, finally with above-mentioned averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.Visible, implement the N number of second-order statistic R of the embodiment of the present invention by calculating _uuthe averaged second order statistic R of matrix _uumatrix carries out co-channel interference suppression to the Received signal strength of user, improves the second-order statistic R being actually used in co-channel interference and suppressing _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

Refer to Fig. 2, Fig. 2 is the schematic flow sheet of the suppressing method of another kind of co-channel interference disclosed in the embodiment of the present invention.Wherein, the method shown in Fig. 2 is applied to be existed in the communication environment of co-channel interference.As shown in Figure 2, the method can comprise the following steps:

S201, estimate the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix.

In the embodiment of the present invention, N be greater than 1 integer, and for the second-order statistic R of the co-channel interference noise signal of each Resource Block in a N continuous Resource Block _uuthe estimation of matrix can use above-mentioned formula (2).

S202, judge above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix.

In the embodiment of the present invention, when the judged result of step S202 is no, the restraining device of co-channel interference performs step S203, and when the judged result of step S202 is for being, the restraining device of co-channel interference can perform step S205.

S203, calculate above-mentioned N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix.

S204, with above-mentioned first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

S205, calculate above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix.

In the embodiment of the present invention, as above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, the restraining device of co-channel interference can calculate above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix.

S206, with above-mentioned second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

As the optional execution mode of one, when the judged result of step S202 is for being, the restraining device of co-channel interference can also perform following steps:

By above-mentioned N number of second-order statistic R _uuthe second-order statistic R revised is needed in matrix _uumatrix replaces with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix;

Calculate above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R of above-mentioned needs correction in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and above-mentioned replacement _uu3rd averaged second order statistic R of matrix _uumatrix, and with the 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

In the embodiment of the present invention, preset second-order statistic R _uuthe second-order statistic R that matrix can estimate for all co-channel interference noise signals that reception antenna receives for public-measurement module _uumatrix.

Implement the embodiment of the present invention and improve the second-order statistic R being actually used in co-channel interference and suppressing _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

Refer to Fig. 3, Fig. 3 is the structural representation of the restraining device of a kind of co-channel interference disclosed in the embodiment of the present invention.As shown in Figure 3, the restraining device 300 of this co-channel interference can comprise estimation module 301, judge module 302, computing module 303 and AF panel module 304, wherein:

Estimation module 301 is for estimating the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix.

In the embodiment of the present invention, N be greater than 1 integer, and estimation module 301 can estimate the second-order statistic R of the co-channel interference noise signal of each Resource Block in a N continuous Resource Block by above-mentioned formula (2) _uumatrix.

Judge module 302 is for judging above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix.

Computing module 303 is for judging above-mentioned N number of second-order statistic R when judge module 302 _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix.

AF panel module 304 is for above-mentioned first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

As the optional execution mode of one, judge module 302 judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix can be:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Calculate in above-mentioned N number of power except maximum power outside the average power of power

Judge above-mentioned maximum power whether be greater than average power with preset first threshold value Th ₁product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is above-mentioned maximum power corresponding second-order statistic R _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, preset first threshold value Th ₁be greater than zero.

As the optional execution mode of another kind, judge module 302 judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix can be:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Judge whether there is target power in above-mentioned N number of power, wherein, target power is greater than predetermined power P _iNwith default Second Threshold Th ₂product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is the second-order statistic R that in target power, each power is corresponding _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, presets Second Threshold Th ₂be greater than zero.

As the optional execution mode of one, computing module 303 can also be used for judging above-mentioned N number of second-order statistic R when judge module 302 _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix.

AF panel module 304, can also be used for above-mentioned second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

Implement the embodiment of the present invention and improve the second-order statistic R being actually used in co-channel interference and suppressing _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

Refer to Fig. 4, Fig. 4 is the structural representation of another kind of co-channel interference restraining device disclosed in the embodiment of the present invention.As shown in Figure 4, the restraining device 400 of this co-channel interference can comprise estimation module 401, judge module 402, computing module 403, AF panel module 404 and replacement module 405, wherein:

Estimation module 401 is for estimating the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix.

In the embodiment of the present invention, N be greater than 1 integer, and estimation module 401 can estimate the second-order statistic R of the co-channel interference noise signal of each Resource Block in a N continuous Resource Block by above-mentioned formula (2) _uumatrix.

Judge module 402 is for judging above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix.

Computing module 403 is for judging above-mentioned N number of second-order statistic R when judge module 402 _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix.

AF panel module 404 is for above-mentioned first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

Replacement module 405 is for judging above-mentioned N number of second-order statistic R when judge module 402 _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, the second-order statistic Ruu matrix revised by above-mentioned needs replaces with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix.

Computing module 403 can also be used for calculating above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and above-mentioned replacement _uu3rd averaged second order statistic R of matrix _uumatrix.

AF panel module 404 can also be used for above-mentioned 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

As the optional execution mode of one, judge module 402 judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix can be:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Calculate in above-mentioned N number of power except maximum power outside the average power of power

Judge above-mentioned maximum power whether be greater than average power with preset first threshold value Th ₁product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is above-mentioned maximum power corresponding second-order statistic R _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, preset first threshold value Th ₁be greater than zero.

As the optional execution mode of another kind, judge module 402 judges above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix can be:

Calculate above-mentioned N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix to obtain N number of power;

Judge whether there is target power in above-mentioned N number of power, wherein, target power is greater than predetermined power P _iNwith default Second Threshold Th ₂product, if so, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and need revise second-order statistic R _uumatrix is the second-order statistic R that in target power, each power is corresponding _uumatrix, if not, then above-mentioned N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, wherein, presets Second Threshold Th ₂be greater than zero.

As the optional execution mode of one, computing module 403 can also be used for judging above-mentioned N number of second-order statistic R when judge module 402 _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate above-mentioned N number of second-order statistic R _uuexcept the second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix.

AF panel module 404, can also be used for above-mentioned second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

Implement the embodiment of the present invention and improve the second-order statistic R being actually used in co-channel interference and suppressing _uumatrix also effectively suppresses co-channel interference with the matching degree of actual co-channel interference noise signal.

It should be noted that, in the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.

Step in embodiment of the present invention method can be carried out order according to actual needs and be adjusted, merges and delete.

Module in embodiment of the present invention device can carry out merging, divide and deleting according to actual needs.

Module described in the embodiment of the present invention, universal integrated circuit can be passed through, such as CPU (CentralProcessing Unit, central processing unit), or realized by ASIC (Application Specific IntegratedCircuit, application-specific integrated circuit (ASIC)).

One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (Random Access Memory, RAM) etc.

Above the suppressing method of a kind of co-channel interference disclosed in the embodiment of the present invention and device are described in detail, apply instantiation herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (10)

1. a suppressing method for co-channel interference, is characterized in that, comprising:

The second-order statistic R of the co-channel interference noise signal of this Resource Block is estimated according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, described N be greater than 1 integer;

Judge described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix;

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate described N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix, and with described first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

2. method according to claim 1, is characterized in that, the described N number of second-order statistic R of described judgement _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix comprises:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Calculate the average power of the power in described N number of power except maximum power;

Judge whether described maximum power is greater than the product of described average power and preset first threshold value, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is second-order statistic R corresponding to described maximum power _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described preset first threshold value is greater than zero.

3. method according to claim 1, is characterized in that, the described N number of second-order statistic R of described judgement _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix comprises:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Judge whether there is target power in described N number of power, described target power is greater than the product of predetermined power and default Second Threshold, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is the second-order statistic R that in described target power, each power is corresponding _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described default Second Threshold is greater than zero.

4. according to the method in claim 2 or 3, it is characterized in that, described method also comprises:

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix, and with described second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

5. method according to claim 3, is characterized in that, described method also comprises:

As described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, by the described second-order statistic R needing to revise _uumatrix replaces with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix;

Calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and described replacement _uu3rd averaged second order statistic R of matrix _uumatrix, and with described 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

6. a restraining device for co-channel interference, is characterized in that, comprising:

Estimation module, for estimating the second-order statistic R of the co-channel interference noise signal of this Resource Block according to the channel estimation value of the Received signal strength on the reference signal position of each Resource Block in a N continuous Resource Block and correspondence _uumatrix, to obtain N number of second-order statistic R _uumatrix, described N be greater than 1 integer;

Judge module, for judging described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uumatrix;

Computing module, for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is not in matrix _uuduring matrix, calculate described N number of second-order statistic R _uufirst averaged second order statistic R of matrix _uumatrix;

AF panel module, for described first averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

7. device according to claim 6, is characterized in that, described judge module judges described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix is:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Calculate the average power of the power in described N number of power except maximum power;

Judge whether described maximum power is greater than the product of described average power and preset first threshold value, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is second-order statistic R corresponding to described maximum power _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described preset first threshold value is greater than zero.

8. device according to claim 6, is characterized in that, described judge module judges described N number of second-order statistic R _uuthe second-order statistic R needing to revise whether is there is in matrix _uuthe concrete mode of matrix is:

Calculate described N number of second-order statistic R _uueach second-order statistic R in matrix _uuthe power of matrix, to obtain N number of power;

Judge whether there is target power in described N number of power, described target power is greater than the product of predetermined power and default Second Threshold, if so, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is in matrix _uumatrix and the second-order statistic R of described needs correction _uumatrix is the second-order statistic R that in described target power, each power is corresponding _uumatrix, if not, then described N number of second-order statistic R _uuthe second-order statistic R needing to revise is there is not in matrix _uumatrix, described default Second Threshold is greater than zero.

9. the device according to claim 7 or 8, is characterized in that, described computing module, also for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, calculate described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond averaged second order statistic R of matrix _uumatrix;

Described AF panel module, also for described second averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.

10. device according to claim 8, is characterized in that, described device also comprises replacement module, wherein:

Described replacement module, for judging described N number of second-order statistic R when described judge module _uuthe second-order statistic R needing to revise is there is in matrix _uuduring matrix, the described second-order statistic Ruu matrix revised that needs is replaced with default second-order statistic R _uumatrix, to obtain the second-order statistic R after replacement _uumatrix;

Described computing module, also for calculating described N number of second-order statistic R _uuexcept the described second-order statistic R needing to revise in matrix _uusecond-order statistic R outside matrix _uusecond-order statistic R after matrix and described replacement _uu3rd averaged second order statistic R of matrix _uumatrix;

Described AF panel module, also for described 3rd averaged second order statistic R _uumatrix is according to carrying out co-channel interference suppression to the Received signal strength of user.