CN103067316A - Crosstalk channel estimation method and device and system - Google Patents

Abstract

The invention discloses a crosstalk channel estimation method, a device and a system, and belongs to the technical field of networks. The crosstalk channel estimation method comprises the following steps: according to crosstalk effect data confirmed in a previous crosstalk channel estimation process, non-idle line pairs in a system are grouped, and crosstalk effect data among different groups of the line pairs are smaller than a first threshold value; the number of the line pairs in each group under the current grouping is obtained; according to the number of the line pairs in each group, pilot sequences are distributed for each group, and at least one pair of non-mutually-orthogonal pilot sequences are arranged among different groups; and the pilot sequences distributed for each group are used, a crosstalk channel of each group is estimated. By adopting the crosstalk channel estimation method, the device and the system, time of an estimation process of crosstalk channels is shortened.

Description

A kind of crosstalk channel estimation method, device and system

Technical field

The present invention relates to networking technology area, particularly a kind of crosstalk channel estimation method, device and system.

Background technology

XDSL(x Digital Subscriber Line, various types of digital subscriber lines) be a kind of Highspeed Data Transmission Technology in the twisted pair telephone transmission, adopt the Discrete multi-tone modulation.Provide the system of multichannel xDSL access to be called DSLAM(DSL Access Multiplexer, the DSL couple in multiplexer), because electromagnetic induction principle, between the multiple signals of many lines to carrying of DSLAM access, can mutually produce and disturb, be called and crosstalk, crosstalk and to be divided into NEXT(Near End Cross-Talk, near-end cross) and FEXT(Far End Cross-Talk, far-end cross talk), near-end cross is the interference that transmits that the reception signal of equipment is subject to proximal device, and far-end cross talk is the interference that transmits of the remote equipment that is subject to of the reception signal of equipment.The up-downgoing channel of xDSL adopts frequency division multiplexing, so near-end cross does not produce too much influence to the performance of system, generally can ignore.And far-end cross talk can produce serious influence to channel speed, causes system unstable, even circuit can't be opened.

Crosstalk counteracting (Vectored-DSL) technology has been proposed in the prior art, for reducing or eliminate FEXT, the main possibility of utilizing the transmitting-receiving of uniting at the DSLAM end, crosstalk channels is estimated, namely the transfer function of each interchannel is calculated, and further calculate the crosstalk counteracting coefficient of upstream or downstream, and according to the crosstalk counteracting coefficient signal is processed, offset the interference of FEXT.The computational process of the estimation of crosstalk channels and crosstalk counteracting coefficient in the Vectored-DSL technology can be employed in the circuit initialization procedure when user access network and after the end of circuit initialization procedure repeatedly.

Crosstalk channels H is at any tone(carrier wave of frequency domain) on can represent by the form of matrix, in the matrix element of the capable j of i row be used for the expression line to j to line to the transfer function of i (line to the transmitting terminal of j to the transfer function of line to the receiving terminal of i, can reflect line to the transmitted signal of j to line crosstalking to the i generation).In the Vectored-DSL technology, for each line to selecting pilot frequency sequence, pilot frequency sequence can be one by 0,1 sequence of binary digits that forms, the pilot frequency sequence that represents with vector form be one by-1,1 vector that forms (wherein, the element 1 corresponding binary digit 0 of vector, the corresponding binary digit 1 of element-1 of vector), in order to calculate more accurately crosstalk channels, the right pilot frequency sequence of each line is mutually orthogonal.Each line on, use respectively successively each bit in the pilot frequency sequence that synchronizing symbol (sync symbol) is modulated transmission, receiving terminal receives the error sample (error sample) that obtains through crosstalking at each synchronizing symbol.By to the analysis of each line to upper pilot frequency sequence and error sample, can calculate crosstalk channels H, and then can draw the crosstalk counteracting coefficient.

In the said process, in order to calculate more accurately crosstalk channels, the length of each pilot frequency sequence should more than or equal to newly activate in the system (join) line to the right sum of (showtime) line of reaching the standard grade (in addition, pilot sequence length also should be 2 naturally several power).System each line on, each bit of corresponding pilot frequency sequence of using in order is modulated transmission to synchronizing symbol and (is used first bit that first synchronizing symbol is modulated transmission, use second bit that second synchronizing symbol modulated transmission, the rest may be inferred), so the number of the synchronizing symbol of crosstalk channels estimation procedure needs is identical with the length of pilot frequency sequence.

In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:

System generally sends symbol (such as 4000symbol/s, 8000symbol/s etc.) by certain cycle, the data symbol of every transmission some (such as 256), send a synchronizing symbol, the length of supposing pilot frequency sequence is n, system needs n synchronizing symbol just can finish the process of a crosstalk channels estimation, as seen, a needed time of crosstalk channels estimation procedure is directly proportional with the length of pilot frequency sequence.Based on existing Vectored-DSL technology, the length of pilot frequency sequence is at least in the system new activation wire to the sum right with the line of reaching the standard grade, and when the new activation wire in the system when more with the right quantity of the line of reaching the standard grade, then can cause the needed time of estimation procedure of crosstalk channels longer, and, the process need that the new right activation of activation wire is reached the standard grade carries out repeatedly the estimation of crosstalk channels and the computational process of crosstalk counteracting coefficient, so very very long of the process that the right activation that also will cause new activation wire is reached the standard grade.

Summary of the invention

In order to solve the problem of prior art, the embodiment of the invention provides a kind of crosstalk channel estimation method, device and system, to shorten the needed time of estimation procedure of crosstalk channels.Described technical scheme is as follows:

On the one hand, a kind of crosstalk channel estimation method is provided, according to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, described method comprises:

Obtain and respectively organize the right number of center line under the current group;

According to each group center line right number, be each set of dispense pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group;

Use to be the pilot frequency sequence of each set of dispense, the crosstalk channels of each group is estimated.

Preferably, described do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, is specially:

Do not have a pair of identical pilot frequency sequence at least between on the same group.

Preferably, described do not have a pair of identical pilot frequency sequence at least between on the same group, is specially:

Be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

Preferably, described crosstalk channels to each group is estimated, is specially the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

Preferably, described crosstalk channels to each group estimates, be specially in each group group wired between crosstalk channels estimate;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

Preferably, it is characterized in that, also comprise:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

Preferably, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

Preferably, when the non-dead wire centering of system have abnormal wire to the time, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

On the other hand, provide a kind of server, described server comprises:

Grouping module, be used for according to before the cross talk effects data determined of crosstalk channels estimation procedure, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges;

Acquisition module is used for obtaining respectively organizing the right number of center line under the current group;

Distribution module is used for being each set of dispense pilot frequency sequence according to the right number of each group center line, does not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group;

Estimation module is used for using being the pilot frequency sequence of each set of dispense, and the crosstalk channels of each group is estimated.

Preferably, described distribution module specifically is used for:

During for each set of dispense pilot frequency sequence, do not have a pair of identical pilot frequency sequence at least between on the same group.

Preferably, described distribution module specifically is used for:

During for each set of dispense pilot frequency sequence, be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

Preferably, described estimation module, concrete being used for the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described distribution module specifically is used for:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

Preferably, described estimation module, concrete be used in each group group wired between crosstalk channels estimate;

Described distribution module specifically is used for: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module specifically is used for:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module specifically is used for:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

Preferably, described distribution module also is used for:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

Preferably, described grouping module specifically is used for:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

Preferably, when the non-dead wire centering of system have abnormal wire to the time, described grouping module specifically is used for:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

On the other hand, provide a kind of crosstalk channels estimating system, comprised terminal and aforesaid server, wherein:

In the process that described use is estimated the crosstalk channels of each group for the pilot frequency sequence of each set of dispense, described terminal is used for: send the pilot frequency sequence that described server is prenoticed to described server; Perhaps, receive the error sample of the pilot frequency sequence of described server transmission, and described error sample is sent to described server.

The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Description of drawings

In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is a kind of crosstalk channel estimation method flow chart that the embodiment of the invention provides;

Fig. 2 is a kind of crosstalk channel estimation method flow chart that the embodiment of the invention provides;

Fig. 3 is a kind of pilot frequency sequence allocation result schematic diagram that the embodiment of the invention provides;

Fig. 4 is a kind of pilot frequency sequence allocation result schematic diagram that the embodiment of the invention provides;

Fig. 5 is a kind of pilot frequency sequence allocation result schematic diagram that the embodiment of the invention provides;

Fig. 6 is a kind of crosstalk channel estimation method flow chart that the embodiment of the invention provides;

Fig. 7 is a kind of server architecture schematic diagram that the embodiment of the invention provides;

Fig. 8 is a kind of server architecture schematic diagram that the embodiment of the invention provides;

Fig. 9 is a kind of crosstalk channels estimating system structural representation that the embodiment of the invention provides.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.

Embodiment one

The embodiment of the invention provides a kind of crosstalk channel estimation method, the method is in advance according to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, with reference to Fig. 1, the handling process of the method can may further comprise the steps:

Step 101 is obtained and is respectively organized the right number of center line under the current group.

Step 102 according to each group center line right number, is each set of dispense pilot frequency sequence, does not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group.

Step 103 is used the pilot frequency sequence into each set of dispense, and the crosstalk channels of each group is estimated.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment two

The embodiment of the invention provides a kind of crosstalk channel estimation method, and the method can be controlled execution by the DSLAM of network side, and wherein, after pilot frequency sequence was determined, follow-up crosstalk channels estimation procedure can have terminal to participate in carrying out.In the method, can be in advance according to before the crosstalk channels estimation procedure in the cross talk effects data determined, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges.The cross talk effects data be for each line of expression between the data of the intensity of crosstalking, line between the cross talk effects data can be this line between the absolute value of crosstalk counteracting coefficient, or the absolute value of crosstalk counteracting coefficient multiply by default coefficient.Here, the first threshold value can be the numerical value that sets in advance, and is preferred in addition, the first threshold value can be each non-dead wire between the cross talk effects data mean value and the default adjustment factor (as, can be set to 1) product.

Line in the system to can be divided into new activation wire to, reach the standard grade line to idle (idle) line pair, new activation wire is to being connection request access network and the line that is carrying out initialized terminal pair, reached the standard grade line to being the access network line of working pair, dead wire is to being not ask access network and the line pair that is in idle state, new activation wire can become the line pair of having reached the standard grade after to the conducting transmission line initialization procedure, new activation wire to the line of reaching the standard grade to being referred to as again non-dead wire pair.The back will be elaborated to the right grouping process of non-dead wire.

Based on above-mentioned grouping, the below will be explained in detail crosstalk channel estimation method flow process shown in Figure 1, and the handling process of the method can may further comprise the steps:

Step 101 is obtained and is respectively organized the right number of center line under the current group.

DSLAM after dividing into groups, can record the relevant information of grouping for certain frequency band at every turn, as comprising which line in every group to right number of, every group of center line etc., and can replace with the grouping information of new record old grouping information.Follow-up crosstalk channels estimation procedure can carry out based on the recent grouping of this frequency band.

Step 102 according to each group center line right number, is each set of dispense pilot frequency sequence, does not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group.Do not use not mutually orthogonal pilot frequency sequence between on the same group, can be reduced to the number of pilot frequency sequence mutually orthogonal in the wired pilot frequency sequence to distribution of institute, thereby can shorten the length of pilot frequency sequence.The length of the pilot frequency sequence of joining for different component can be the same or different, if different, so group with organize between all pilot frequency sequences not mutually orthogonal.

If be the pilot frequency sequence of each set of dispense equal length, do not have a pair of identical pilot frequency sequence at least between on the same group so.Preferably, be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.Like this, by wired number to pilot frequency sequence mutually orthogonal in the pilot frequency sequence that distributes, be the total number that distributes pilot frequency sequence, also be the number of pilot sequences of distributing the maximum group of number of pilot sequences.

In the circuit initialization procedure, can carry out repeatedly crosstalk channels estimation procedure, these crosstalk channels estimation procedures can be to estimate new activation wire to the crosstalk channels right to the line of reaching the standard grade, also can be estimate all non-dead wires between crosstalk channels.For example, in the circuit initialization procedure of standard code, R-P-VECTOR1, R-P-VECTOR1-1, R-P-VECTOR1-2 stage are to estimate that new activation wire is to the up crosstalk channels right to the line of reaching the standard grade, O-P-VECTOR1, O-P-VECTOR1-1, O-P-VECTOR2 stage are to estimate that new activation wire is to the descending crosstalk channels right to the line of reaching the standard grade, the R-P-VECTOR2 stage be estimate all non-dead wires between up crosstalk channels, the O-P-VECTOR2-1 stage be estimate all non-dead wires between descending crosstalk channels.Above-mentioned these crosstalk channels estimation procedures can carry out by group-based.

Concrete, to the new activation wire in each group group when the right crosstalk channels of the line of reaching the standard grade is estimated, step 102 is on the same group processing can be not specific as follows: for comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number; For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number; For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

At this moment, mutually orthogonal between each pilot frequency sequence on the same group, and can use identical pilot frequency sequence also can use different pilot frequency sequences between the different groups.The line of reaching the standard grade on the same group be to using identical pilot frequency sequence also can use mutually orthogonal pilot frequency sequence, and the line of having reached the standard grade is to mutually orthogonal with the right pilot frequency sequence of new activation wire.So the minimum number of the pilot frequency sequence of group can be that new activation wire logarithm adds 1 in this group.

Concrete, wired when the crosstalk channels between (namely in the group all non-dead wires to) is estimated to the institute in each group group, the processing of step 102 can be specific as follows: for each line in organizing to distributing number for organizing interior demand pairs purpose pilot frequency sequence.

For each line in the accurately estimation group between crosstalk channels, can for each line in organizing to distributing mutually orthogonal pilot frequency sequence.The pilot frequency sequence that each group is used can be the same or different.For example, L1 belongs to G1, and L2 belongs to G2, and the pilot frequency sequence of L1 and L2 use can be identical.

Because each row of Walsh matrix is vectorial mutually orthogonal, so can use the delegation of Walsh matrix as a pilot frequency sequence, can with line index identify pilot frequency sequence corresponding be which of Walsh matrix, line index is 1 corresponding the first row, line index is 2 correspondence the second row, and the rest may be inferred.

It is to be noted in addition, for the Walsh matrix of same order not, low order Walsh matrix is identical with each element of the high-order Walsh matrix upper left corner, for example front two row, two row of quadravalence Walsh matrix are a second order Walsh matrix, so front n the element of the Walsh matrix of same order on any identical row is not identical.

In some cases, can be in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system.The characteristic that has according to above-mentioned not same order Walsh matrix as can be known, the front n position of each pilot frequency sequence that the corresponding row index is identical is identical.Like this, DSLAM is in up crosstalk channels estimation procedure for the first time, can after choosing pilot frequency sequence, determine its line index in the Walsh matrix, the preset length that this line index is corresponding (is generally selected a larger length again, such as 512) pilot frequency sequence notify to terminal, follow-up each up crosstalk channels estimation procedure, DSLAM need not to reselect pilot frequency sequence, also need not to send notice to terminal.In this case, in up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group can be as follows:

Method one, be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure; For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line; Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.Wherein, this secondary line initialization procedure is ongoing circuit initialization procedure or the firm circuit initialization procedure that finishes.

Based on method one, for the pilot sequence length of each set of dispense can be not identical.For each group, because it is constant to the line index of choosing pilot frequency sequence to remain new activation wire, and pilot frequency sequence mutually orthogonal in will the assurance group, so the length of its pilot frequency sequence is at least in this group the newly right maximum row index of activation wire.And the length of pilot frequency sequence need to be set to 2 natural number power.So preferred, pilot sequence length can be set to 2 natural number power more than or equal to this maximum row index.And for some group, if it organizes the right number in interior lines greater than this maximum row index, then in order to guarantee to organize the mutually orthogonal of interior pilot frequency sequence, the length of its pilot frequency sequence can be at least the right number in group interior lines.At this moment preferred, pilot sequence length can be set to the natural number power more than or equal to demand pairs purpose 2 in the group.

Method two, be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure; If the line pair count of the group of line pair count maximum greater than this maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count; If the line pair count of the group of line pair count maximum is not more than this maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

Based on method two, for the pilot sequence length of each set of dispense identical.That is to say to be wired pilot frequency sequence to the distribution equal length in each group, so the length of the pilot frequency sequence the longest group of pilot frequency sequence that should satisfy the demands.Line pair count and the maximum row index of the group of line pair count maximum can be compared, if maximum line pair count is greater than the maximum row index, illustrate that then the longest group of demand pilot frequency sequence is the group of line pair count maximum, the length that pilot frequency sequence can be set is at least this maximum line pair count, is preferably more than or equals the natural number power of this max line logarithm purpose 2.If maximum line pair count is not more than the maximum row index, illustrate that then the longest group of demand pilot frequency sequence is the group under this maximum row index, the length that pilot frequency sequence can be set is at least this maximum row index, is preferably more than or equals 2 natural number power of this maximum row index.

In addition, for the length that the makes pilot frequency sequence the longest group of pilot frequency sequence that satisfies the demands, also can a kind of method of reference method, according to maximum row index in the line pair count in each group group and the group, obtain each group to the demand of pilot sequence length, then relatively draw maximum pilot sequence length.

Preferably, for the processing mode in said method one and the method two, can also increase following processing: if the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to this second threshold value; If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.Adopt this processing, the lower limit of a pilot sequence length can be set, make the length of pilot frequency sequence be not less than this length lower limit, this second default threshold value is preferably 2 natural number power.

Step 103 is used the pilot frequency sequence into each set of dispense, and the crosstalk channels of each group is estimated.

DSLAM then can according to the pilot frequency sequence that distributes, estimate the crosstalk channels of each group after being the complete pilot frequency sequence of each set of dispense.

When descending crosstalk channels is estimated, DSLAM modulates transmission to the corresponding pilot frequency sequence of use to synchronizing symbol at each non-dead wire, and receive the error sample of each terminal feedback, then according to the analysis of pilot frequency sequence and error sample, calculate descending crosstalk channels.

When up crosstalk channels was estimated, DSLAM was each line to after distributing pilot frequency sequence, determines the line index of pilot frequency sequence in the Walsh matrix, each pilot frequency sequence of the preset length that each line index is corresponding by corresponding line to notifying the terminal of its connection.Terminal then according to its pilot frequency sequence that receives, is modulated and is sent to DSLAM synchronizing symbol after receiving notice.DSLAM receives corresponding error sample, then according to the analysis of pilot frequency sequence and error sample, calculates up crosstalk channels.

Here, terminal only needs the pilot frequency sequence according to preset length in the notice, and the modulation that carry out synchronizing symbol sends, and is not the length of its line to the pilot frequency sequence of distribution and can know that DSLAM is actual.Like this, be the situation that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system for the each up crosstalk channels estimation procedure in circuit initialization procedure described in the step 102, the length of pilot frequency sequence can change, DSLAM can according to the length of the pilot frequency sequence of its distribution, receive the error sample.

Below in conjunction with the circuit initialization procedure, the grouping process right to non-dead wire is elaborated.

In the circuit initialization procedure, can carry out repeatedly crosstalk channels and estimate, after the circuit initialization procedure finishes, also can carry out repeatedly crosstalk channels and estimate, estimate each reached the standard grade line between crosstalk channels.According to these Procedure Acquisitions to crosstalk channels can divide into groups, make not on the same group line between the cross talk effects data less than the first threshold value that arranges, crosstalking and can ignore between namely thinking not on the same group.In addition, the condition that can also increase grouping is, the group interior lines between the cross talk effects data more than or equal to the first threshold value, the line that can not ignore of soon crosstalking each other is to dividing at one group.

Concrete, in the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, (the R-P-VECTOR1 stage (up direction) in the circuit initialization procedure of standard definition just can get access in the system new activation wire after finishing to the up cross talk effects data right to the line of reaching the standard grade, and just can get access in the system newly activation wire to the descending cross talk effects data right to the line of reaching the standard grade after descending crosstalk channels estimation procedure (O-P-VECTOR1 stage (down direction)) finishes for the first time at up crosstalk channels estimation procedure for the first time so.So, preferably, when the first time that can be in this secondary line initialization procedure, up crosstalk channels estimation procedure finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data less than the first threshold value that arranges; When the first time that also can be in this secondary line initialization procedure, descending crosstalk channels estimation procedure finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between descending cross talk effects data less than the first threshold value that arranges.

Like this, follow-up crosstalk channels estimation procedure can carry out on the basis of this grouping, certainly, also can again divide into groups in follow-up process, can obtain dividing into groups more accurately.

The initialized process of circuit can be carried out initialization to up channel and down channel respectively, up channel uses different frequency ranges with down channel, line between crosstalk channels on different frequency ranges separate, so the estimation procedure of up crosstalk channels and descending crosstalk channels can be separate.To non-dead wire when dividing into groups, can divide into groups based on up cross talk effects data or based on descending cross talk effects data respectively, two kinds of packet modes are independent of each other.

In addition, preferably, also can consider up cross talk effects data and descending cross talk effects data, divide into groups, namely in the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.In addition, the condition that can increase grouping is, the group interior lines between up cross talk effects data and/or descending cross talk effects data more than or equal to the first threshold value.Like this, with each other up crosstalk can not ignore and/or the descending line that can not ignore of crosstalking to minute at one group.This group result can be applied in the follow-up up crosstalk channels estimation procedure and descending crosstalk channels estimation procedure.

Concrete, in the circuit initialization procedure, if there is not the line pair of having reached the standard grade in the system, then the circuit initialization procedure can only carry out one time the crosstalk channels estimation procedure on up (or descending) direction, in the estimating system each new activation wire between crosstalk channels, carrying out once up crosstalk channels estimation procedure and descending crosstalk channels estimation procedure once, new activation wire becomes the line pair of reaching the standard grade to reaching the standard grade.In this case, the process of grouping can be carried out after the circuit initialization procedure finishes, in addition, for there being the right situation of line of having reached the standard grade in the above-mentioned circuit initialization procedure system, after finishing, the circuit initialization procedure also can divide into groups, the result of this moment grouping can be applied to circuit and reach the standard grade the stage in the follow-up crosstalk channels estimation procedure of (stage between the two secondary line initialization procedures can be carried out repeatedly crosstalk channels estimation procedure in this stage).

Preferably, reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after can finishing according to the circuit initialization procedure line between up cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data less than the first threshold value that arranges; Reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after also can finishing according to the circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between descending cross talk effects data less than the first threshold value that arranges.Because new activation wire is to becoming the line of reaching the standard grade to rear, each line between the cross talk effects data may change, so this method can obtain dividing into groups more accurately.

In addition, also can consider up cross talk effects data and descending cross talk effects data, divide into groups, reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after namely finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.In addition, the condition that can increase grouping is, the group interior lines between up cross talk effects data and/or descending cross talk effects data more than or equal to the first threshold value.Like this, with each other up crosstalk can not ignore and/or the descending line that can not ignore of crosstalking to minute at one group.

When the non-dead wire centering of system have abnormal wire to (as, the line that pad value exceeds normal range (NR) to, repeatedly the line that can not reach the standard grade of initialization is to the line equity of, loose contact) time, the process of grouping can be specific as follows: according to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With abnormal wire in the group that joins the mean value maximum.Two lines between the cross talk effects data comprise First Line to the cross talk effects data right to the second line, and the second line is to the cross talk effects data right to First Line.

For example, 5 non-dead wires are arranged to L1, L2, L3, L4, L5 in the system, wherein L5 is abnormal wire pair, so, and at first, L1, L2, L3, L4 are divided into groups, suppose to be divided into two groups of G1, G2, G1={L1, L2}, G2={L3, L4}, then, calculate the mean value of the right cross talk effects data of each line among L5 and the G1, be denoted as ${\mathrm{Weight}}_{L5\↔G1}=({\mathrm{weight}}_{L5\→L1}+{\mathrm{weight}}_{L1\→L5}+{\mathrm{weight}}_{L5\→L2}+{\mathrm{weight}}_{L2\→L5})/4,$ Weight _{L5 → L1}That L5 is to the cross talk effects data of L1, weight _{L1 → L5}That L1 is to the cross talk effects data of L5, weight _{L5 → L2}That L5 is to the cross talk effects data of L2, weight _{L2 → L5}Be L2 to the cross talk effects data of L5, and calculate in the same way the mean value of the right cross talk effects data of each line among L5 and the G2

At last, relatively With

Suppose Larger, then L5 is joined among the G1, the group result that obtains is G1={L1, L2, L5}, G2={L3, L4}.

If a plurality of unusual non-dead wires pair are arranged, then to not unusual non-dead wire to grouping after, to each abnormal wire pair, all determine in a manner mentioned above the grouping under it.

In addition, grouping process under these abnormal conditions also can be: according to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

It should be noted that, the above-mentioned grouping of carrying out based on up cross talk effects data, can be applied in the follow-up up crosstalk channels estimation procedure, the grouping of carrying out based on descending cross talk effects data, can be applied in the follow-up descending crosstalk channels estimation procedure, based on the grouping that up cross talk effects data and descending cross talk effects data are carried out, can be applied in follow-up up crosstalk channels estimation procedure and the row crosstalk channels estimation procedure.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment three

The embodiment of the invention provides a kind of crosstalk channel estimation method, below in conjunction with the initialized process of circuit the crosstalk channel estimation method that the embodiment of the invention provides is further set forth, there is the line pair of having reached the standard grade in system in this circuit initialization procedure, concrete handling process can referring to Fig. 2, may further comprise the steps:

The access request that step 201, DSLAM receiving terminal send, and carry out handshake procedure with terminal.

Step 202, in the DSLAM estimating system new activation wire to the descending crosstalk channels right to the line of reaching the standard grade (corresponding O-P-VECTOR1 stage), and in the estimating system new activation wire to the up crosstalk channels right to the line of reaching the standard grade (corresponding R-P-VECTOR1 stage).

Can be not in this step to non-dead wire to dividing into groups, the distribution of pilot frequency sequence can be referring to Fig. 3, L1-L6 is the line pair of having reached the standard grade among the figure, after finishing, upper once circuit initialization procedure too organizes G1={L1, L2, L3}, G2={L4, L5, L6}, L7-L12 is new activation wire pair, and before existing grouping can't exert an influence to the distribution of current pilot frequency sequence.Here distributed identical pilot frequency sequence for L1-L6.

Step 203, DSLAM is according to descending cross talk effects data and the up cross talk effects data determined in the crosstalk channels estimation procedure, to the non-dead wire in the system to dividing into groups.Wherein, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges, and the group interior lines between up cross talk effects data and/or descending cross talk effects data be not less than this first threshold value.Here suppose that group result is: G1={L1, L2, L3, L7, L8, L9}, G2={L4, L5, L6, L10, L11, L12}.

Step 204, in R-P-VECTOR1-1, R-P-VECTOR1-2, O-P-VECTOR1-1, O-P-VECTOR2 stage, DSLAM estimates that based on above-mentioned grouping the interior new activation wire of each group group is to the upstream or downstream crosstalk channels right to the line of reaching the standard grade.

Concrete, in above-mentioned each stage, at first, DSLAM can obtain first and respectively organize the right number of center line under the current group, and then, DSLAM is according to the right number of each group center line, be each set of dispense pilot frequency sequence, at last, DSLAM estimates the crosstalk channels of each group according to being the pilot frequency sequence of each set of dispense.

Step 205, in R-P-VECTOR2 and O-P-VECTOR2-1 stage, DSLAM is based on above-mentioned grouping, estimate in each group group wired right uplink and downlink crosstalk channels.Detailed process is as above no longer tired out and is stated.

In the crosstalk channels estimation procedure in above-mentioned steps 204, each stage of 205, the distribution of pilot frequency sequence can be such as Fig. 4 or shown in Figure 5, different groups can adopt identical pilot frequency sequence also can adopt different pilot frequency sequences, in the method for salary distribution shown in Figure 4, new activation wire is not to using the line index in the step 202, in the method for salary distribution shown in Figure 5, new activation wire is to using the line index in the step 202.Be to organize the interior line of reaching the standard grade to having distributed mutually orthogonal pilot frequency sequence among Fig. 4, Fig. 5, for each stage in the step 204, also can be for organizing the interior line of reaching the standard grade to distributing identical pilot frequency sequence.

Step 206, new activation wire is to becoming the line pair of reaching the standard grade, and the circuit initialization is finished.Can carry out the work such as Multiple Channel Analysis and data interaction in this stage.

Further, after step 206, DSLAM can also be to all have been reached the standard grade line right crosstalk channels is estimated in the system, according to the up cross talk effects data that obtain in the crosstalk channels estimation procedure and descending cross talk effects data to the line of reaching the standard grade to dividing into groups, and according to the result of new grouping, carrying out the reach the standard grade the stage follow-up crosstalk channels of (stage between the two secondary line initialization procedures can be carried out repeatedly crosstalk channels estimation procedure in this stage) of circuit estimates.

According to the crosstalk channels on the uplink and downlink direction of each group that obtains at last, can further calculate the crosstalk counteracting coefficient, can process the signal that in the subsequent data transmission process, receives and send the line of having reached the standard grade in the system according to the crosstalk counteracting coefficient, to reduce system interference.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment four

The embodiment of the invention provides a kind of crosstalk channel estimation method, the crosstalk channel estimation method that the embodiment of the invention provides is further set forth below in conjunction with the initialized process of circuit and the follow-up circuit stage of reaching the standard grade, there is not the line pair of having reached the standard grade in system in this circuit initialization procedure, concrete handling process can referring to Fig. 6, may further comprise the steps:

The access request that step 601, DSLAM receiving terminal send, and carry out handshake procedure with terminal.

Step 602, in R-P-VECTOR2 and O-P-VECTOR2-1 stage, DSLAM estimate all new activation wires between the uplink and downlink crosstalk channels.Owing to do not have the line pair of having reached the standard grade in the system, can not carry out O-P-VECTOR1, R-P-VECTOR1, R-P-VECTOR1-1, R-P-VECTOR1-2, O-P-VECTOR1-1, O-P-VECTOR2 stage.

Step 603, new activation wire is to becoming the line pair of reaching the standard grade, and the circuit initialization is finished.Can carry out the work such as Multiple Channel Analysis and data interaction in this stage.

Step 604, DSLAM estimates the right uplink and downlink crosstalk channels of all lines of having reached the standard grade in the system, the up cross talk effects data that obtain according to the crosstalk channels estimation procedure and descending cross talk effects data to the line of reaching the standard grade to dividing into groups.

Step 605, DSLAM is according to the result of new grouping, carries out the reach the standard grade the stage follow-up crosstalk channels of (stage between the two secondary line initialization procedures can be carried out repeatedly crosstalk channels estimation procedure in this stage) of circuit and estimates.

According to the crosstalk channels on the uplink and downlink direction of each group that obtains at last, can further calculate the crosstalk counteracting coefficient, can process the signal that in the subsequent data transmission process, receives and send the line of having reached the standard grade in the system according to the crosstalk counteracting coefficient, to reduce system interference.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment five

Based on identical technical conceive, the embodiment of the invention provides a kind of server, and referring to Fig. 7, this server comprises:

Grouping module 710, be used for according to before the cross talk effects data determined of crosstalk channels estimation procedure, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges;

Acquisition module 720 is used for obtaining respectively organizing the right number of center line under the current group;

Distribution module 730 is used for being each set of dispense pilot frequency sequence according to the right number of each group center line, does not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group;

Estimation module 740 is used for using being the pilot frequency sequence of each set of dispense, and the crosstalk channels of each group is estimated.

Preferably, described distribution module 730 specifically is used for:

During for each set of dispense pilot frequency sequence, do not have a pair of identical pilot frequency sequence at least between on the same group.

Preferably, described distribution module 730 specifically is used for:

During for each set of dispense pilot frequency sequence, be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

Preferably, described estimation module 740, concrete being used for the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described distribution module 730 specifically is used for:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

Preferably, described estimation module 740, concrete be used in each group group wired between crosstalk channels estimate;

Described distribution module 730 specifically is used for: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module 730 specifically is used for:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module 730 specifically is used for:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

Preferably, described distribution module 730 also is used for:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

Preferably, described grouping module 710 specifically is used for:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

Preferably, when the non-dead wire centering of system have abnormal wire to the time, described grouping module 710 specifically is used for:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment six

Based on identical technical conceive, the embodiment of the invention provides a kind of server, and referring to Fig. 8, this server comprises processor 810 and memory 820, and processor 810 and memory 820 are configured to carry out following operation:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Obtain and respectively organize the right number of center line under the current group; According to each group center line right number, be each set of dispense pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group; Use to be the pilot frequency sequence of each set of dispense, the crosstalk channels of each group is estimated.

Preferably, described do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, is specially:

Do not have a pair of identical pilot frequency sequence at least between on the same group.

Preferably, described do not have a pair of identical pilot frequency sequence at least between on the same group, is specially:

Be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

Preferably, described crosstalk channels to each group is estimated, is specially the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

Preferably, described crosstalk channels to each group estimates, be specially in each group group wired between crosstalk channels estimate;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

Preferably, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

Preferably, it is characterized in that, also comprise:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

Preferably, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

Preferably, when the non-dead wire centering of system have abnormal wire to the time, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Embodiment seven

Based on identical technical conceive, the embodiment of the invention provides a kind of crosstalk channels estimating system, referring to Fig. 9, comprise terminal 910 and as the described server 920 of above-mentioned embodiment, wherein:

In the process that described use is estimated the crosstalk channels of each group for the pilot frequency sequence of each set of dispense, described terminal 910 is used for: send the pilot frequency sequence that described server 920 is prenoticed to described server 920; Perhaps, receive the error sample of the pilot frequency sequence of described server 920 transmissions, and described error sample is sent to described server 920.

In the embodiment of the invention, non-dead wire in the system is a plurality ofly crosstalked negligible group each other to being divided into, because crosstalking and to ignore between group and the group, so each group can be regarded an independently system as, when distributing pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, reduced the number of mutually orthogonal pilot frequency sequence, thereby required pilot sequence length also can shorten when carrying out the crosstalk channels estimation, therefore can shorten the needed time of estimation procedure of crosstalk channels.

Need to prove: the crosstalk channels estimation unit that above-described embodiment provides is when estimating crosstalk channels, only the division with above-mentioned each functional module is illustrated, in the practical application, can as required the above-mentioned functions distribution be finished by different functional modules, the internal structure that is about to device is divided into different functional modules, to finish all or part of function described above.In addition, crosstalk channels estimation unit and crosstalk channel estimation method embodiment that above-described embodiment provides belong to same design, and its specific implementation process sees embodiment of the method for details, repeats no more here.

The invention described above embodiment sequence number does not represent the quality of embodiment just to description.

The all or part of step that one of ordinary skill in the art will appreciate that realization above-described embodiment can be finished by hardware, also can come the relevant hardware of instruction to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (21)

1. crosstalk channel estimation method, it is characterized in that, according to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, described method comprises:

Obtain and respectively organize the right number of center line under the current group;

According to each group center line right number, be each set of dispense pilot frequency sequence, do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group;

Use to be the pilot frequency sequence of each set of dispense, the crosstalk channels of each group is estimated.

2. method according to claim 1 is characterized in that, described do not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group, is specially:

Do not have a pair of identical pilot frequency sequence at least between on the same group.

3. method according to claim 2 is characterized in that, described do not have a pair of identical pilot frequency sequence at least between on the same group, is specially:

Be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

4. method according to claim 1 is characterized in that, described crosstalk channels to each group is estimated, is specially the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

5. method according to claim 1 is characterized in that, described crosstalk channels to each group estimates, be specially in each group group wired between crosstalk channels estimate;

Described basis is respectively organized the right number of center line, is each set of dispense pilot frequency sequence, is specially: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

6. method according to claim 1 is characterized in that, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

7. method according to claim 1 is characterized in that, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, according to the right number of each group center line, during for each set of dispense pilot frequency sequence, determine that the method for the length of pilot frequency sequence in each group comprises:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

8. according to claim 6 or 7 described methods, it is characterized in that, also comprise:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

9. method according to claim 1, it is characterized in that, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

10. method according to claim 1, it is characterized in that, when the non-dead wire centering of system have abnormal wire to the time, the cross talk effects data of determining in the crosstalk channels estimation procedure before the described basis, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges, be specially:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

11. a server is characterized in that, described server comprises:

Grouping module, be used for according to before the cross talk effects data determined of crosstalk channels estimation procedure, to the non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges;

Acquisition module is used for obtaining respectively organizing the right number of center line under the current group;

Distribution module is used for being each set of dispense pilot frequency sequence according to the right number of each group center line, does not have a pair of not mutually orthogonal pilot frequency sequence at least between on the same group;

Estimation module is used for using being the pilot frequency sequence of each set of dispense, and the crosstalk channels of each group is estimated.

12. server according to claim 11 is characterized in that, described distribution module specifically is used for:

During for each set of dispense pilot frequency sequence, do not have a pair of identical pilot frequency sequence at least between on the same group.

13. server according to claim 12 is characterized in that, described distribution module specifically is used for:

During for each set of dispense pilot frequency sequence, be all pilot frequency sequences of each set of dispense, all a pilot frequency sequence in each pilot frequency sequence of the group maximum with distributing number of pilot sequences is identical.

14. server according to claim 11 is characterized in that, described estimation module, concrete being used for the new activation wire in each group group the right crosstalk channels of the line of reaching the standard grade is estimated;

Described distribution module specifically is used for:

For comprising new activation wire to the group right with the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence, and for new activation wire be new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of new activation wire, for new activation wire is new activation wire logarithm purpose pilot frequency sequence to distributing number;

For only comprising the right group of the line of reaching the standard grade, for the line of reaching the standard grade to distributing same pilot frequency sequence.

15. server according to claim 11 is characterized in that, described estimation module, concrete be used in each group group wired between crosstalk channels estimate;

Described distribution module specifically is used for: for each line in organizing is demand pairs purpose pilot frequency sequence in the group to distributing number.

16. server according to claim 11 is characterized in that, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module specifically is used for:

Be in system each new activation wire pilot frequency sequence line index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

For the group of the right number of group center line greater than the right maximum row index of new activation wire in the group, and do not comprise the right group of new activation wire, determine that the length of pilot frequency sequence in the group is more than or equal to the right number of group center line;

Be not more than the group of the right maximum row index of new activation wire in the group for group center line right number, determine that the length of pilot frequency sequence in the group is more than or equal to the new right maximum row index of activation wire in the group.

17. server according to claim 11 is characterized in that, in circuit initialization procedure, each up crosstalk channels estimation procedure is that each new activation wire remains unchanged to the line index of pilot frequency sequence in the Walsh matrix that distributes in the system;

In up crosstalk channels estimation procedure, described distribution module specifically is used for:

Be in system each new activation wire pilot frequency sequence maximum row index in Walsh matrix to distribute in the up crosstalk channels estimation procedure first time of obtaining this secondary line initialization procedure;

If the line pair count of the group of line pair count maximum greater than described maximum row index, is then determined the equal in length of pilot frequency sequence in each group, and more than or equal to this maximum line pair count;

If the line pair count of the group of line pair count maximum is not more than described maximum row index, then determine the equal in length of pilot frequency sequence in each group, and more than or equal to described maximum row index.

18. according to claim 16 or 17 described servers, it is characterized in that described distribution module also is used for:

If the span of the pilot sequence length of determining comprises the second default threshold value, then the length of this pilot frequency sequence is set to described the second threshold value;

If the span of the pilot sequence length of determining does not comprise the second default threshold value, then the length of this pilot frequency sequence is set in this span minimum 2 natural number power.

19. server according to claim 11 is characterized in that, described grouping module specifically is used for:

In the circuit initialization procedure, if there is the line pair of having reached the standard grade in the system, when then the first time in this secondary line initialization procedure, up crosstalk channels estimation procedure and the first time, descending crosstalk channels estimation procedure all finished, according to non-dead wire in the system that determines in the first time of this secondary line initialization procedure up crosstalk channels estimation procedure between up cross talk effects data, and in the system that determines in the first time of this secondary line initialization procedure descending crosstalk channels estimation procedure non-dead wire between descending cross talk effects data, to the non-dead wire in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges; Perhaps,

Reached the standard grade in the system that determines in the up crosstalk channels estimation procedure that carries out after finishing according to the circuit initialization procedure line between up cross talk effects data, and reached the standard grade in the system that determines in the descending crosstalk channels estimation procedure that carries out after finishing of circuit initialization procedure line between descending cross talk effects data, to the line of reaching the standard grade in the system to dividing into groups, not on the same group line between up cross talk effects data and descending cross talk effects data all less than the first threshold value that arranges.

20. server according to claim 11 is characterized in that, when the non-dead wire centering of system have abnormal wire to the time, described grouping module specifically is used for:

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; For each group, in determining described abnormal wire pair and organizing each line between the mean value of cross talk effects data; With described abnormal wire in the group that joins the mean value maximum; Perhaps,

According to the cross talk effects data of determining in the crosstalk channels estimation procedure before, to non-unusual non-dead wire in the system to dividing into groups, not on the same group line between the cross talk effects data less than the first threshold value that arranges; Determine that non-each unusual non-dead wire is to the mean value to each right cross talk effects data of described abnormal wire; Determine in described each cross talk effects data greater than line corresponding to the cross talk effects data of described mean value pair, and with described abnormal wire to joining this line in the affiliated group.

21. a crosstalk channels estimating system is characterized in that, comprises terminal and such as the described server of claim 11-20, wherein:

In the process that described use is estimated the crosstalk channels of each group for the pilot frequency sequence of each set of dispense, described terminal is used for: send the pilot frequency sequence that described server is prenoticed to described server; Perhaps, receive the error sample of the pilot frequency sequence of described server transmission, and described error sample is sent to described server.

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