CN107027132B

CN107027132B - A kind of signal detecting method and device

Info

Publication number: CN107027132B
Application number: CN201610069243.XA
Authority: CN
Inventors: 吴凯
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2019-05-21
Anticipated expiration: 2036-02-01
Also published as: WO2017133408A1; CN107027132A

Abstract

The invention discloses a kind of signal detecting method and devices to improve the efficiency of signal detection to reduce the complexity of signal detection.In this method signal detecting method, the joint channel estimation matrix of serving cell and interfered cell is ranked up first, to first successively carry out the traversal search of constellation symbol to each transport layer of serving cell, the M constellation symbol that each transport layer of serving cell retains is determined；Wherein, M is positive integer；For each transport layer of interfered cell, the M constellation symbol by calculating the constellation symbol retained in fixed each transport layer composition combines the corresponding judgement amount in this layer, and hard decision is carried out to each judgement amount, obtain M constellation symbol of this layer reservation.

Description

A kind of signal detecting method and device

Technical field

The present invention relates to field of communication technology more particularly to a kind of signal detecting methods and device.

Background technique

In enhancing long term evolution (Long Term Evolution Advanced, LTE-A) version 12 (Rel 12) system In, in order to promote the throughput of system under interference scene, network side can be by the information of some interfered cells of transmitting signaling downwards to use Family equipment (User Equipment, UE), so that DSCH Downlink Shared Channel (Physical downlink of the UE to interfered cell Shared channel, PDSCH) interference signal detection (the Network Assisted that is inhibited or deleted Interference Cancellation and Suppression, NAICS), this scene be to the signal of serving cell and The signal of interfered cell carries out joint reception, and the receiver that joint receives the signal of serving cell and the signal of interfered cell is claimed For NAICS receiver.

In traditional receiver (not supporting the receiver of NAICS characteristic), the maximum likelihood with M algorithm is decomposed using QR (QR detection with M algorithm Maximum Likelihood Detection, QRD-M) detection algorithm The signal received is detected.Based on traditional receiver, in spatial multiplexing transmission, using QRD-M detection algorithm The data of each transport layer of detection are that UE needs received target data.The basic thought of the QRD-M detection algorithm is: to biography Defeated layer is successively searched for, and is chosen multiple constellation symbols most possible in each transport layer and is retained, and chooses possible star The combination (combination of the constellation symbol is a vector, and branch is known as in this detection algorithm) of seat symbol, the foundation of selection are The lesser branch of cumulative metric is chosen, after completing all layers of search, the smallest branch of cumulative metric value is chosen, as detection As a result it exports.

However, the signal (target data) for needing simultaneously to send serving cell in NAICS receiver and interfered cell The signal (non-targeted data) of transmission is detected.If directly using traditional QRD-M detection algorithm, target letter cannot be distinguished Number, prevent detection algorithm causes the waste of operand, increases signal detection from accomplishing that the specific aim of special scenes optimizes Complexity.

Summary of the invention

The embodiment of the invention provides a kind of signal detecting method and devices to mention to reduce the complexity of signal detection The efficiency of high RST detection.

A kind of signal detecting method provided in an embodiment of the present invention, comprising:

The traversal search that constellation symbol is successively carried out to the transport layer of serving cell determines each transmission of the serving cell The M constellation symbol that layer retains；Wherein, M is positive integer；

According to the M constellation symbol that each transport layer of the serving cell retains, each transmission of interfered cell is determined The M constellation symbol that layer retains, wherein for each transport layer of interfered cell, in M constellation for determining that the transport layer retains It during symbol, calculates by m-th of constellation symbol retaining in the transport layer, with retain in determining the transport layer M M-th of constellation symbol group that m-th of the constellation symbol retained in fixed each transport layer before constellation symbol collectively forms It closes, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }；

For each transport layer of serving cell: being retained according to each transport layer of the interfered cell and serving cell M constellation symbol, and M constellation symbol forming of the constellation symbol by retaining in fixed each transport layer combine it is right respectively The accumulation branched measurement value answered determines a constellation symbol in the corresponding multiple constellation symbols of the transport layer as the transport layer Search result, and determine the transport layer the corresponding soft bit information of search result.

In this method provided in an embodiment of the present invention, constellation symbol first targetedly is carried out to each transport layer of serving cell Number traversal search, determine the serving cell each transport layer retain M constellation symbol, wherein M is positive integer；For Each transport layer of interfered cell and without traversal search, but the M retained according to each transport layer of the serving cell A constellation symbol, come determine interfered cell each transport layer retain M constellation symbol, also, be directed to interfered cell it is every One transport layer, during determining the M constellation symbol that the transport layer retains, calculating is by retain in the transport layer m-th The m retained in constellation symbol, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that a constellation symbol collectively forms, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }； Finally, being directed to each transport layer of serving cell: M retained according to each transport layer of the interfered cell and serving cell Constellation symbol, and M constellation symbol forming of the constellation symbol by retaining in fixed each transport layer are combined and are respectively corresponded Accumulation branched measurement value, determine a constellation symbol in the corresponding multiple constellation symbols of the transport layer as the transport layer Search result, and determine the corresponding soft bit information of search result of the transport layer.To reduce in signal detection process Operand reduces the complexity of signal detection, improves the efficiency of signal detection.

Preferably, before the transport layer to serving cell successively carries out constellation symbol search, this method further include:

Each column channel estimation value in united channel estimate matrix is ranked up, by the united channel estimation square The corresponding each column channel estimation value of serving cell is discharged to the right side of the matrix in battle array, does in the united channel estimate matrix Disturb the left side that the corresponding each column channel estimation value of cell is discharged to the matrix.

It is thus possible to make in entire signal detection process, targetedly each transport layer first corresponding to serving cell Carry out constellation symbol search, and then each transport layer of search interfered cell.

Preferably, the corresponding each column channel estimation value of serving cell in the united channel estimate matrix is discharged to described The right side of matrix, the corresponding each column channel estimation value in interfered cell is discharged to the matrix in the united channel estimate matrix Left side specifically includes:

For the corresponding each column channel estimation value of serving cell in the united channel estimate matrix: believing according to each column The descending sequence of the corresponding performance number of road estimated value, is successively arranged since the right side of the matrix to the left；And for institute State the corresponding each column channel estimation value in interfered cell in united channel estimate matrix: corresponding according to each column channel estimation value The ascending sequence of performance number, is successively arranged to the right since the left side of the matrix.

Preferably, determining the every of interfered cell according to the M constellation symbol that each transport layer of the serving cell retains The M constellation symbol that one transport layer retains, specifically includes:

For each transport layer of interfered cell: the M constellation symbol retained according to fixed each transport layer calculates It is combined by the M constellation symbol that the constellation symbol retained in fixed each transport layer forms corresponding in interfered cell The judgement amount of the transport layer；

For each judgement amount in the M judgement amounts, hard decision is carried out to the judgement amount, it is corresponding to obtain the judgement amount Constellation symbol, and the M star that the corresponding constellation symbol of each judgement amount is retained as the transport layer of interfered cell Seat symbol.

To can determine for each transport layer of interfered cell without executing the traversal search process of constellation symbol The constellation symbol retained in the transport layer, reduces operand, thereby reduces the overall complexity of signal detection, improves letter Number detection efficiency.

Preferably, calculating M star being made of the constellation symbol retained in fixed each transport layer according to the following formula The corresponding judgement amount of seat symbol combination:

Wherein,In indicating to be combined by the M constellation symbol that the constellation symbol retained in fixed each transport layer forms M-th of constellation symbol combine the corresponding judgement amount in i-th layer of transport layer, i indicates the number of interfered cell current transmission layer；Indicate i-th of element in equivalent received signals vector；N_LIndicate total number of plies of the transport layer of serving cell and interfered cell； X^leftIt is initially empty matrix, and is stored in the constellation symbol combination of reservation after carrying out constellation symbol search to transport layer every time X^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIndicate that carrying out QR to received signal vector in advance decomposes To R matrix in the i-th row jth column element；r_i,iIndicate the element that the i-th row i-th arranges in the R matrix.

Preferably, each transport layer of interfered cell is directed to, in the mistake for calculating the M constellation symbol retained by the transport layer Cheng Zhong determines m-th of the constellation symbol retained in the transport layer, with M constellation symbol retaining in determining the transport layer it M-th of constellation symbol combination that m-th of the constellation symbol retained in preceding fixed each transport layer collectively forms, it is corresponding tired Product branched measurement value, specifically includes:

For each transport layer of interfered cell:

According to the constellation symbol that fixed each transport layer retains, m-th of constellation by retaining in the transport layer is calculated M-th of the star retained in symbol, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that seat symbol collectively forms, the increment of corresponding branched measurement value；

The increment for combining m-th of constellation symbol corresponding branched measurement value, and by fixed each transport layer M-th of constellation symbol in the M constellation symbol combination of the constellation symbol composition of reservation combines corresponding accumulation branched measurement value It is added, m-th of constellation symbol by retaining in the transport layer is obtained, with the M constellation symbol retained in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in front of fixed each transport layer collectively forms, it is corresponding Accumulate branched measurement value.

Preferably, being directed to each transport layer of interfered cell: the constellation symbol retained according to fixed each transport layer, Calculate by m-th of constellation symbol retaining in the transport layer, with before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in determining each transport layer collectively forms, corresponding degree of branching The increment of magnitude, specifically includes:

For each transport layer of interfered cell: calculated according to the following formula by retaining m-th of constellation symbol in the transport layer Number, with m-th of the constellation retained in fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that symbol collectively forms, the increment of corresponding branched measurement value:

Wherein, bm_i(m) it indicates by m-th of constellation symbol retaining in i-th layer of transport layer, and is determining i-th layer of transport layer Collectively form m-th of m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol of middle reservation Constellation symbol combines the increment of corresponding branched measurement value, and i indicates the number of interfered cell current transmission layer；It indicates equivalent to connect Receive i-th of element in signal vector；Indicate m-th of the constellation symbol retained in i-th layer of transport layer；N_LIndicate that service is small Total number of plies of the transport layer in area and interfered cell；X^leftIt is initially empty matrix, and is searched carrying out constellation symbol to transport layer every time The constellation symbol combination of reservation is stored in X after rope^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIt is pre- The element of the i-th row jth column in the R matrix that QR is decomposed first is carried out to received signal vector；r_i,iFor the i-th row in the R matrix The element of i-th column.

Preferably, each transport layer for interfered cell, is calculating m-th of constellation by retaining in the transport layer M-th of the star retained in symbol, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol that seat symbol collectively forms combines, after corresponding accumulation branched measurement value, this method further include:

For each transport layer of interfered cell: m-th of constellation symbol by retaining in the transport layer is somebody's turn to do with determining M-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in transport layer collectively forms The combination of m-th of constellation symbol, corresponding accumulation branched measurement value is ranked up according to sequence from small to large.

A kind of signal supervisory instrument provided in an embodiment of the present invention, comprising:

First determination unit successively carries out constellation symbol search for the transport layer to serving cell, determines that the service is small The M constellation symbol that each transport layer in area retains；Wherein, M is positive integer；

Second determination unit, the M constellation symbol for being retained according to each transport layer of the serving cell determine dry Disturb the M constellation symbol that each transport layer of cell retains, wherein for each transport layer of interfered cell, determining the biography During the M constellation symbol that defeated layer retains, m-th of constellation symbol by retaining in the transport layer is calculated, is somebody's turn to do with determining M-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in transport layer collectively forms M-th of constellation symbol combination, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }；

Third determination unit, for being directed to each transport layer of serving cell: according to the interfered cell and serving cell M constellation symbol retaining of each transport layer, and the M that forms of the constellation symbol by retaining in fixed each transport layer is a Constellation symbol combines corresponding accumulation branched measurement value, determines a star in the corresponding multiple constellation symbols of the transport layer Search result of the seat symbol as the transport layer, and determine the corresponding soft bit information of search result of the transport layer.

In the device provided in an embodiment of the present invention, the first determination unit is targetedly first passed through to each of serving cell Transport layer carries out the traversal search of constellation symbol, determines the M constellation symbol that each transport layer of the serving cell retains, In, M is positive integer；Each transport layer for interfered cell and without traversal search, but pass through the second determination unit, root According to the serving cell each transport layer retain M constellation symbol, come determine interfered cell each transport layer reservation M A constellation symbol, also, it is directed to each transport layer of interfered cell, in the mistake for M constellation symbol for determining transport layer reservation Cheng Zhong calculates m-th of constellation symbol by retaining in the transport layer, with the M constellation symbol retained in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in front of fixed each transport layer collectively forms, it is corresponding Accumulate branched measurement value；Wherein, m ∈ { 1 ..., M }；Finally, being directed to each transmission of serving cell by third determination unit Layer: the M constellation symbol retained according to each transport layer of the interfered cell and serving cell, and by fixed each biography M constellation symbol of the constellation symbol composition retained in defeated layer combines corresponding accumulation branched measurement value, determines the transmission Search result of the constellation symbol as the transport layer in the corresponding multiple constellation symbols of layer, and determine searching for the transport layer The corresponding soft bit information of hitch fruit.To reduce the operand in signal detection process, reduce the complexity of signal detection Degree, improves the efficiency of signal detection.

Preferably, first determination unit is before the transport layer to serving cell successively carries out constellation symbol search, It is also used to:

Preferably, first determination unit believes the corresponding each column of serving cell in the united channel estimate matrix Road estimated value is discharged to the right side of the matrix, the corresponding each column channel estimation in interfered cell in the united channel estimate matrix When value is discharged to the left side of the matrix, it is specifically used for:

Preferably, the M constellation symbol that second determination unit retains according to each transport layer of the serving cell, When determining the M constellation symbol that each transport layer of interfered cell retains, it is specifically used for:

For each transport layer of interfered cell: the M constellation symbol retained according to fixed each transport layer calculates It is combined by the M constellation symbol that the constellation symbol retained in fixed each transport layer forms corresponding in the transport layer Judgement amount；

Preferably, second determination unit calculates the constellation by retaining in fixed each transport layer according to the following formula M constellation symbol of symbol composition combines corresponding judgement amount:

Preferably, second determination unit is directed to each transport layer of interfered cell, in the M for determining that the transport layer retains During a constellation symbol, m-th of constellation symbol by retaining in the transport layer is calculated, is retained in determining the transport layer M constellation symbol before m-th of constellation symbol for collectively forming of m-th of constellation symbol retaining in fixed each transport layer Number combination, when corresponding accumulation branched measurement value, is specifically used for:

For each transport layer of interfered cell:

Preferably, second determination unit is directed to each transport layer of interfered cell: according to fixed each transmission The constellation symbol that layer retains, calculate by m-th of constellation symbol retaining in the transport layer, and retains in determining the transport layer M-th of constellation symbol that m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol collectively forms Combination when the increment of corresponding branched measurement value, is specifically used for:

Wherein, bm_i(m) it indicates by m-th of constellation symbol retaining in i-th layer of transport layer, and is determining i-th layer of transport layer Collectively form m-th of m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol of middle reservation Constellation symbol combines the increment of corresponding branched measurement value, and i indicates the number of interfered cell current transmission layer；It indicates equivalent to connect Receive i-th of element in signal vector；Indicate m-th of the constellation symbol retained in i-th layer of transport layer；N_LIndicate serving cell With total number of plies of the transport layer of interfered cell；X^leftIt is initially empty matrix, and constellation symbol search is being carried out to transport layer every time The constellation symbol combination of reservation is stored in X afterwards^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIndicate pre- The element of the i-th row jth column in the R matrix that QR is decomposed first is carried out to received signal vector；r_i,iIt indicates i-th in the R matrix The element that row i-th arranges.

Preferably, second determination unit is directed to each transport layer of interfered cell, calculating by being protected in the transport layer In m-th of the constellation symbol stayed, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol that m-th of the constellation symbol retained collectively forms combines, and after corresponding accumulation branched measurement value, also uses In:

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of tree search schematic diagram of QRD-M algorithm provided in an embodiment of the present invention；

Fig. 2 is a kind of overall flow schematic diagram of signal detecting method provided in an embodiment of the present invention；

Fig. 3 is a kind of idiographic flow schematic diagram of signal detecting method provided in an embodiment of the present invention；

Fig. 4 is a kind of structural schematic diagram of signal supervisory instrument provided in an embodiment of the present invention；

Fig. 5 is the structural schematic diagram of another signal supervisory instrument provided in an embodiment of the present invention.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.

In NAICS scene, typical mode is as follows:

In above formula, r indicates N_R× 1 received signal vector；N_RIndicate the number of receiving antenna；H_S,eqIndicate serving cell Equivalent channel estimation between UE, H_I,eqIndicate that the equivalent channel between interfered cell and UE is estimated；N_SIndicate serving cell Transmit the number of plies, N_IIndicate the transmission number of plies of interfered cell, N_LIndicate the total transmission number of plies of serving cell and interfered cell, and N_L= N_S+N_I；H_cmb=(H_S,eq H_I,eq) indicate to carry out the corresponding equivalent channel estimation of serving cell and interfered cell in combination The transmission channel of virtual multiple-input and multiple-output (Multiple Input Multiple Output, MIMO), and H_cmbThe dimension of matrix Degree is N_R×N_L；x_SIndicate the transmission signal vector of serving cell, x_IIndicate the transmission signal vector of interfered cell, Indicate the equivalent transmission vector of the transmission symbol combination of serving cell and interfered cell；N indicates noise vector.

Above-mentioned parameter and corresponding physical meaning will hereinafter continue to continue to use.

Fig. 1 is a kind of tree search schematic diagram of QRD-M algorithm provided in an embodiment of the present invention.

Wherein, N_LTo N_L-N_SThe corresponding transport layer of+1 layer of expression serving cell, as shown in figure 1 part institute more than dotted line Show, N_L-N_SLayer is to the 1st layer of corresponding transport layer in expression interfered cell, as shown in figure 1 shown in dotted line part below.

First from the N of serving cell_LLayer transport layer starts successively to carry out constellation symbol to the transport layer of serving cell downwards Number traversal search:

Every one layer of search selects the corresponding constellation symbol (being referred to as branch) of the lesser accumulation branched measurement value of M Retained, remaining branch casts out, and the constellation point that "×" number is drawn in Fig. 1 indicates the branch cast out.For example, in Fig. 1, it is right In N_L- 1 layer, first constellation point shown in figure and second constellation point (corresponding picture "×" number) are known as In N_LA branch on the basis of first constellation point in layer, correspondingly, N_LTwo constellation points on -1 layer of right side can be with It is known as in N_LThe branch etc. on the basis of m-th constellation point in layer.

Secondly, each transport layer corresponding to interfered cell successively scans for, it is described here to each of interfered cell Transport layer scans for, and does not imply that as the method for each transport layer of search service cell to the progress time of each transport layer Search is gone through, but as follows:

Transport layer corresponding for interfered cell, first searched transport layer are N_L-N_SLayer: the layer is searched It is corresponding at this to calculate M branch according to the M branch that each transport layer for the serving cell searched for retains by Suo Shi The judgement amount of layer, then hard decision is carried out respectively to this M judgement amount, obtain M constellation symbol of this layer reservation, wherein service The M branch that each transport layer of cell retains, it can be understood as be the constellation symbol group retained by each transport layer of serving cell At the big branches of M, for example, the 1st constellation symbol retained in each transport layer of serving cell forms the 1st big point , the big branch of the m-th constellation symbol composition m-th retained in each transport layer of serving cell.

If interfered cell corresponds to multilayer transmission layer, second searched transport layer is N_L-N_SIt -1 layer, searches for always To the 1st layer.For N_L-N_SEach transport layer of -1 layer of transport layer into the 1st layer of transport layer: according to each transport layer searched for (each transport layer searched for herein while including each transport layer for the serving cell searched for and the interfered cell searched for Each transport layer) M branch retaining, the corresponding judgement amount in this layer of M branch is calculated, then divide this M judgement amount Not carry out hard decision, obtain this layer reservation M constellation symbol.Wherein, if indicating N with Q_LData institute is transmitted in layer transport layer The total number of the corresponding constellation symbol of the modulation system of use, then M is less than or equal to Q.

Referring to fig. 2, a kind of signal detecting method provided in an embodiment of the present invention, it is whole comprising the following three steps:

S101, the traversal search that constellation symbol is successively carried out to the transport layer of serving cell, determine the every of the serving cell The M constellation symbol that one transport layer retains；Wherein, M is positive integer；

Here, the method for determining the M constellation symbol that each transport layer of the serving cell retains will be carried out hereinafter It is set forth.

S102, the M constellation symbol retained according to each transport layer of the serving cell, determine each of interfered cell The M constellation symbol that transport layer retains, wherein for each transport layer of interfered cell, determining that the M that the transport layer retains is a It during constellation symbol, calculates by m-th of constellation symbol retaining in the transport layer, and retains in determining the transport layer M-th of constellation symbol that m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol collectively forms Combination, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }；

Since the value of m in the step is m ∈ { 1 ..., M }, that is to say, that for each transport layer of interfered cell: most Can determine the constellation symbol by retaining in the transport layer eventually, with before the constellation symbol that retains in determining the transport layer really The M constellation symbol combination (i.e. M branch) that the constellation symbol retained in fixed each transport layer collectively forms is corresponding Accumulate branched measurement value.

It should be noted that in the step, according to the M constellation symbol that each transport layer of the serving cell retains, Determine the M constellation symbol that each transport layer of interfered cell retains, specific as follows:

In first transport layer (i.e. N for determining interfered cell_L-N_SLayer) retain M constellation symbol when, be according to institute State the M constellation symbol determination of each transport layer reservation of serving cell；In second transport layer one for determining interfered cell A to the last transport layer (i.e. N_L-N_S- 1 layer to the 1st layer) retain M constellation symbol when, be according to the serving cell M constellation retaining of the fixed each transport layer of M constellation symbol and interfered cell that retains of each transport layer accord with It determines number jointly.

In addition, in this step, fixed each transport layer, the transport layer including serving cell.Specifically, when When interfered cell includes multilayer transmission layer, in first transport layer (i.e. N for determining interfered cell_L-N_SLayer) it is the M retained middle When constellation symbol, fixed each transport layer includes all transport layers of serving cell, this is because, this method In, it is first determined the M constellation symbol retained in each transport layer of serving cell determines each biography of interfered cell again later The M constellation symbol retained in defeated layer；In second transport layer (i.e. N for determining interfered cell_L-N_S- 1 layer) it is the M retained middle When constellation symbol, fixed each transport layer includes with all transport layers of determining serving cell and with true First transport layer of fixed interfered cell, this is because, the M star retained in second transport layer for determining interfered cell When seat symbol, it has been determined that the M constellation symbol retained in first transport layer of interfered cell；And so on.

S103, each transport layer for serving cell: according to each transport layer of the interfered cell and serving cell M constellation symbol of reservation, and the M constellation symbol that the constellation symbol by retaining in fixed each transport layer forms combine Corresponding accumulation branched measurement value determines that a constellation symbol in the corresponding multiple constellation symbols of the transport layer is used as and is somebody's turn to do The search result of transport layer, and determine the corresponding soft bit information of search result of the transport layer.

Wherein, it is accorded with described in the step by the M constellation that the constellation symbol retained in fixed each transport layer forms Number combination, can also be referred to as M branch being made of the constellation symbol retained in fixed each transport layer, and above solve The meaning released is identical.

Above-mentioned steps S102~S103 is a kind of overall flow of signal detecting method provided in an embodiment of the present invention, below Specific signal detecting method is provided, referring to Fig. 3, detailed step is as follows:

Step S201: to united channel estimate matrix H_cmbIn each column channel estimation value be ranked up so that H_cmbIn The corresponding each column channel estimation value of serving cell is located at the right side of matrix, H_cmbThe corresponding each column channel estimation value in middle interfered cell Positioned at the left side of matrix, the joint channel estimation matrix after rearrangement is usedIt indicates.

If serving cell has multilayer transmission layer, each column channel estimation value corresponding to serving cell is believed according to each column The descending sequence of the corresponding performance number of road estimated value, successively from matrix H_cmbRight side start to arrange to the left；If interfered cell Also there is multilayer transmission layer, then each column channel estimation value corresponding to interfered cell is according to the corresponding power of each column channel estimation value It is worth ascending sequence, is successively arranged to the right since the matrix left side.

Wherein, above-mentionedIn each column channel estimation value all correspond to one layer of transport layer, the column channel estimation value is corresponding The size of performance number indicate the channel quality of corresponding with column channel estimation value transport layer.For example, serving cell has two layers There is one layer of transport layer in transport layer, interfered cell, then correspondingly joint channel estimation matrix H_cmbMiddle three column element of correspondence, after sequence MatrixIn secondary series and third column corresponding with service cell two layers of transport layer, matrixIn first row it is corresponding dry One layer of transport layer of cell is disturbed, also, the number of the transport layer of serving cell and interfered cell is respectively as follows: for serving cell pair The number of the preferable one layer of transport layer of the channel quality answered is 3, i.e., the 3rd layer, correspondingIn the 3rd column；For serving cell The number of one layer of poor transport layer of corresponding channel quality is 2, i.e., the 2nd layer, correspondingIn the 2nd column；Interfered cell The number of transport layer is 1, i.e., the 1st layer, correspondingIn the 1st column.

To may make during subsequent tree search, first be scanned for each transport layer of serving cell.

Step S202: to the joint channel estimation matrix obtained after sequenceQR decomposition is carried out, Q matrix and R square are exported Battle array.Wherein Q matrix is unitary matrice, and R matrix is upper triangular matrix, initializes X^leftFor N_LThe empty matrix of × M, BM be 1 × M to Amount.R matrix is shown below:

Step S203: to received signal vector r premultiplication Q^H, obtain equivalent received vector

Step S204: the traversal search of constellation symbol is successively carried out to each transport layer of serving cell, i.e., from N_LLayer is opened Begin to N_L-N_SIt+1 layer, successively scans for, determines the multiple constellation symbols retained in each transport layer of serving cell, and just Beginningization X^leftFor N_L× M full null matrix.

This step executes as follows:

S204-1, the N for transport layer_LLayer, Q constellation symbol in this layer of corresponding constellation set is brought into respectively The calculating of following formula progress branched measurement value:

Wherein, bm_NL(q) N is indicated_LThe corresponding metric of q-th of constellation symbol in layer transport layer, 1≤q≤Q, Q are indicated The total number of the corresponding constellation symbol of modulation system used by data is transmitted in this layer of transport layer；Indicate vectorIn N_LA element；s_qIndicate q-th of constellation symbol in Q constellation symbol in this layer of corresponding constellation set；It indicates N in the R matrix that QR is decomposed is carried out to received signal vector in advance_LRow N_LThe element of column.

After calculating Q constellation symbol corresponding metric, selects a metric of wherein lesser M (M≤Q) and carry out Retain, and be stored in BM after M metric of reservation is ranked up according to sequence from small to large, by this M metric point Not corresponding constellation symbol s_qIt is stored in X^leftN_LRow, remaining constellation symbol are given up.

S204-2, the N for transport layer_L- 1 layer to N_L-N_S+ 1 layer, the biography is determined according to following identical mode The corresponding accumulation degree of branching of each branch of the M constellation symbol (i.e. M branch) and the transport layer that retain in defeated layer Magnitude.

By taking one of transport layer as an example, due to the corresponding Q constellation symbol of the transport layer and upper one fixed transmission M constellation symbol in layer constitutes M × Q constellation symbol combination (i.e. M × Q branch), and therefore, it is necessary to according to following public affairs Formula carries out M × Q operation, and then determines the increment of the corresponding branched measurement value of M × Q branch in the transport layer:

Wherein, m ∈ { 1 ..., M }, i indicate the number of transport layer, i ∈ { N_L-1,…,N_L-N_S+1}；Indicate equivalent received I-th of element in signal vector；r_i,jIt indicates to carry out in the R matrix that decomposes of QR the i-th row the to received signal vector in advance The element of j column；r_i,iIndicate the element that the i-th row i-th arranges in the R matrix；X^lefT (j, m) is X^leftThe member of middle jth row m column Element.

For M × Q branch in the transport layer:

Determine the corresponding accumulation branched measurement value of M × Q branch in this layer according to the following formula first:

BM_tmp((m-1) × Q+q)=BM (m)+bm_i((m-1)×Q+q) (5)

Wherein, m ∈ { 1 ..., M }；i∈{N_L-1,…,N_L-N_S+1}；BM (m) indicates M element of newest preservation in vector In m-th of element, each element is an accumulation branched measurement value.For example, when determining N_LM points retained in -1 layer It is after branch and the corresponding accumulation branched measurement value of M branch, this M accumulation branched measurement value is suitable according to from small to large It replaces and is saved in original BM vector after sequence sequence, later, determine N_LThe M branch and M branch retained in -2 layers Corresponding accumulation branched measurement value, is determining N_LThe corresponding accumulation branch metric of the M branch retained in -2 layers When value, according to formula (5), need to use the element in the BM vector of newest preservation, therefore, the correspondence saved in BM vector N_L- 1 layer of M accumulation branched measurement value is newest preservation, and so on.

Secondly M lesser iterated integrals are chosen from the corresponding accumulation branched measurement value of M × Q branch in this layer Branch metric, and replaced after this M accumulation branched measurement value is ranked up according to sequence from small to large and be saved in BM vector In, correspondingly, the corresponding constellation symbol retained in this layer of branched measurement value is accumulated by this M and is stored in X^leftI-th Row, wherein i is corresponding with the number of current layer, for example, the layer is N_L- 1 layer, then the M constellation symbol that will retain in this layer It is stored in X^leftN_L- 1 row gives up remaining branch in the layer.

It should be noted that in the introduction to step S204, for each transport layer of serving cell, by the transport layer The total number of the corresponding constellation symbol of modulation system used by middle transmission data is unified to be indicated with Q, certainly, for different biographies The numerical value of defeated layer, Q may be the same or different, and the embodiment of the present invention is not construed as limiting this.

Also, for serving cell, the number of plies of transport layer can be one layer, or multilayer.When serving cell When having one layer of transport layer, then above-mentioned S204-1 is only carried out；When serving cell has multilayer transmission layer, then successively execute S204-1 and S204-2.

That is, in step S204, one layer of transport layer of every search, then correspondingly determine retain in this layer M compared with Small accumulation branched measurement value, replacement is saved in original BM vector after it is ranked up according to sequence from small to large, And this M corresponding constellation symbols retained in this layer of lesser accumulation branched measurement value are saved in X^leftIn with In the corresponding row of the number of this layer.

Step S205: constellation symbol search is successively carried out to each transport layer of interfered cell, i.e., from N_L-N_SLayer start to It 1st layer, successively scans for, for each transport layer of interfered cell: determining the transport layer according to following identical mode The corresponding accumulation branched measurement value of M constellation symbol retained in the M constellation symbol and the transport layer of middle reservation.

Wherein, the transport layer of interfered cell can only have one layer, can also there is multilayer, and the embodiment of the present invention does not limit this It is fixed.

By taking one of transport layer of interfered cell as an example, the step implementation procedure is as follows:

S205-1: (one is combined according to M constellation symbol of the constellation symbol composition retained in fixed each transport layer The corresponding current X of constellation symbol combination^leftIn the column constellation symbol that has saved), determine the M constellation symbol according to following formula Each constellation symbol in combination combines the corresponding judgement amount in the transport layer:

Wherein,Indicate that m-th of constellation symbol combines the corresponding judgement amount in i-th layer of transport layer, i indicates that interference is small The number of the current transmission layer in area, i ∈ { N_L-N_S..., 1 }, m ∈ { 1 ..., M }.

S205-2: carrying out hard decision to M judgement amount of the transport layer respectively, obtain M constellation symbol, by this M star The M constellation symbol that seat symbol retains as the transport layer.

That is, rightHard decision is carried out, constellation symbol is obtainedWherein,What expression retained in i-th layer M-th of constellation symbol, i ∈ { N_L-N_S..., 1 }, m ∈ { 1 ..., M }.

Wherein, the method for hard decision can be realized using the conventional treatment method in existing signal detecting method, the present invention Embodiment is not introduced excessively herein.

S205-3: the corresponding branch of each constellation symbol (i.e. branch) retained in the transport layer is determined according to following formula The increment of metric:

Wherein, bm_i(m) the corresponding degree of branching of m-th of constellation symbol retained in i-th layer of transport layer of interfered cell is indicated The increment of magnitude, i ∈ { N_L-N_S..., 1 }, m ∈ { 1 ..., M }.

And according to formula (7) as a result, to calculate each branch for retaining in the transport layer using following formula corresponding Accumulate branched measurement value:

BM_tmp(m)=BM (m)+bm_i(m) (8)

Wherein, i ∈ { N_L-N_S..., 1 }, m ∈ { 1 ..., M }.For example, working as i=N_L-N_SWhen, gained is calculated using formula (8) M-th of accumulation branched measurement value be N_L-N_SThe corresponding accumulation branched measurement value of m-th of branch in layer.

S205-4: by the corresponding accumulation branched measurement value of each constellation symbol (i.e. branch) retained in the transport layer according to Sequence from small to large is replaced after being ranked up and is saved in BM vector, and by the corresponding star of each accumulation branched measurement value Seat symbol is saved in X^leftIn in row corresponding with the number of the transport layer.

That is, in step S205, one layer of transport layer of every search then correspondingly determines the M star retained in this layer Seat symbol and the corresponding accumulation branched measurement value of this M constellation symbol, by the M constellation symbol retained in this layer point Not corresponding accumulation branched measurement value is replaced after being ranked up according to sequence from small to large and is saved in original BM vector, and This M corresponding constellation symbol in this layer of accumulation branched measurement value is saved in X^leftIn it is corresponding with the number of this layer In row.

Step S206: for each transport layer of serving cell: according to each transport layer of interfered cell and serving cell M constellation symbol of reservation, and the M constellation symbol that the constellation symbol by retaining in fixed each transport layer forms combine Corresponding accumulation branched measurement value determines that a constellation symbol in the corresponding multiple constellation symbols of the transport layer is used as and is somebody's turn to do The search result of transport layer, and determine the corresponding soft bit information of search result of the transport layer.

That is, each transport layer is equal after the completion of all transport layers of serving cell and interfered cell are all searched for M constellation symbol is remained, thus in X^leftIn save N_L× M element, this N_L× M element is N_L× M constellation symbol Number, correspondingly, newest M element is saved in BM, which is by serving cell and interfered cell (constellation symbol combines corresponding X for the M constellation symbol combination of the constellation symbol composition retained in each transport layer^leftMiddle preservation A column constellation symbol) corresponding accumulation branched measurement value.

To for each transport layer of serving cell: according to X^leftThe N of middle preservation_LIn × M constellation symbol and BM The newest M accumulation branched measurement value saved, determines a constellation symbol in the corresponding multiple constellation symbols of the transport layer As the search result of the transport layer, and determine the corresponding soft bit information of search result of the transport layer.Wherein it is determined that soft ratio The method of special information can realize that details are not described herein for the embodiment of the present invention using the prior art.

In addition, in the present embodiment, when into BM, replacement saves M accumulation branched measurement value each time, be according to Sequence from small to large, which accumulates after branched measurement value is ranked up M, to be saved, it is of course also possible to according to other sequences into Row sequence, such as according to sequence etc. from big to small, the embodiment of the present invention is not construed as limiting this.

Specific embodiment is given below.

Assuming that in the lte networks, 1 layer of transmission that serving cell is TM6, modulation system is orthogonal phase-shift coding (Quadrature Phase Shift Keying, QPSK), interfered cell are also 1 layer of TM6 transmission, and modulation system is 16 just It hands over amplitude amplitude-modulation (Quadrature Amplitude Modulation, QAM), the number N of the corresponding receiving antenna of terminal_R= 2, thus total number of plies N of the transport layer of serving cell and interfered cell_L=2.Based under the scene, such as to the process of signal detection Under:

(1) H is used_S,eqIndicate the corresponding equivalent channel estimation of serving cell, H_I,eqIndicate the corresponding equivalent channel in interfered cell Estimation, serving cell and the corresponding joint equivalent channel estimated matrix H in interfered cell_cmbIt indicates, then the matrix is the square of 2X2 Battle array.To joint equivalent channel estimated matrix H_cmbIn each column channel estimation value be ranked up after obtain matrixSo that H_S,eqPositioned at matrixThe 2nd column, H_I,eqPositioned at matrixThe 1st column.

(2) rightQR decomposition is carried out, and the effective transmission model decomposed based on QR carries out tree search.

(3) constellation symbol search being carried out to the corresponding transport layer of serving cell, the number of the transport layer is 2, i.e., the 2nd layer, Correspond toThe 2nd column, need to carry out Q=4 operation, obtain the corresponding branch of 4 constellation symbols (branch) in this layer Metric, selection retain M=4 branch, and be stored in after this corresponding branched measurement value of 4 branches is ranked up BM to In amount, the corresponding constellation symbol in this layer of this 4 branched measurement values is stored in X^leftThe 2nd row.

(4) the corresponding transport layer in interfered cell is scanned for, the number of the transport layer is 1, i.e., the 1st layer, corresponds toThe 1st column.Specifically, according to the corresponding transport layer of serving cell (i.e. the 2nd layer) retain 4 branches, calculate separately this 4 A branch carries out hard decision to this 4 judgement amounts respectively, obtains 4 constellation symbols in the judgement amount of current layer, by this 4 stars Seat symbol is as 4 constellation symbols retained in the transport layer.Later, 4 constellation symbols point retained in the transport layer are calculated Not corresponding accumulation branched measurement value, and replace and be saved in BM vector after this 4 accumulation branched measurement values are ranked up, it will The corresponding constellation symbol of this 4 accumulation branched measurement values is stored in X^leftThe 1st row.

(4) according to 4 constellation symbol (the i.e. X retained respectively in layers 1 and 2 transport layer^left2 × 4 of middle preservation Constellation symbol) and BM vector in newest preservation 4 accumulation branched measurement values, determine the transport layer the (the i.e. the 2nd of serving cell Layer) search result of the constellation symbol as the transport layer in corresponding 4 constellation symbols, and determine serving cell should The corresponding soft bit information of the search result of transport layer.

In another embodiment:

Assuming that in the lte networks, 2 layers of transmission that serving cell is TM4, the corresponding modulation system of each layer is to be QPSK, interfered cell are also 2 layers of TM4 transmission, and the corresponding modulation system of each layer is 16QAM, the corresponding reception day of terminal The number N of line_R=2, thus total number of plies N of the transport layer of serving cell and interfered cell_L=4.Based under the scene, to signal The process of detection is as follows:

(A) H is used_S,eqIndicate the corresponding equivalent channel estimation of serving cell, H_I,eqIndicate the corresponding equivalent channel in interfered cell Estimation, serving cell and the corresponding joint equivalent channel estimated matrix H in interfered cell_cmbIt indicates, then the matrix is the square of 2X4 Battle array.It is H to the joint equivalent channel estimated matrix_cmbIn each column channel estimation value be ranked up after obtain matrixSo that H_S,eqPositioned at matrixThe 3rd, 4 column, and power it is biggish column be located at the 4th column；H_I,eqPositioned at matrixThe 1st, 2 column, And the biggish column of power are located at the 2nd column.

(B) rightQR decomposition is carried out, and the effective transmission model decomposed based on QR carries out tree search.

(C) constellation symbol search is successively carried out to the transport layer of interfered cell:

The preferable layer of the corresponding channel quality of search service cell first, corresponds toThe 4th column, the number of this layer is 4, i.e., the 4th layer, need to carry out Q=4 operation, obtain the corresponding branched measurement value of 4 constellation symbols (branch) in this layer, choosing It selects and retains M=4 branch, and be stored in BM vector after this corresponding branched measurement value of 4 branches is ranked up, by this 4 The corresponding constellation symbol in this layer of branched measurement value is stored in X^leftThe 4th row.

Secondly the poor layer of the corresponding channel quality of search service cell, corresponds toThe 3rd column, the number of this layer is 3, i.e., the 3rd layer, need to carry out Q × M=16 operation, obtain the corresponding accumulation branch metric of 16 branches in this layer Value, therefrom the corresponding branch of the lesser accumulation branched measurement value of selection 4 retains, remaining branch casts out.4 that this layer is retained The corresponding accumulation branched measurement value of a branch is replaced after being ranked up and is saved in BM vector, and by this 4 branch metrics It is worth the corresponding constellation symbol in this layer and is stored in X^leftThe 3rd row.

(D) two layers of transport layer corresponding to interfered cell scans for respectively:

Specifically, the corresponding preferable layer of channel quality in interfered cell is first searched for, is corresponded toThe 2nd column, this layer Number is 2, i.e., the 2nd layer.According to the 4 of the constellation symbol composition retained in fixed each transport layer (i.e. the 4th layer and the 3rd layer) A constellation symbol combination (corresponding current X of each constellation symbol combination^leftOne column constellation symbol of middle preservation), calculate separately this 4 constellation symbol combinations carry out hard decision to this 4 judgement amounts respectively, obtain 4 constellation symbols in the judgement amount of current layer, Using this 4 constellation symbols as 4 constellation symbols retained in the transport layer.Later, 4 stars retained in the transport layer are calculated The corresponding accumulation branched measurement value of seat symbol, and replaced after this 4 accumulation branched measurement values are ranked up and be saved in BM In vector, the corresponding constellation symbol of this 4 accumulation branched measurement values is stored in X^leftThe 2nd row.

Secondly the poor layer of the corresponding channel quality in search interfered cell, corresponds toThe 1st column, the number of this layer is 1, i.e., the 1st layer.According to the 4 of the constellation symbol composition retained in fixed each transport layer (i.e. the 4th layer, the 3rd layer and the 2nd layer) A constellation symbol combination (corresponding current X of each constellation symbol combination^leftOne column constellation symbol of middle preservation), calculate separately this 4 constellation symbol combinations carry out hard decision to this 4 judgement amounts respectively, obtain 4 constellation symbols in the judgement amount of current layer, Using this 4 constellation symbols as 4 constellation symbols retained in the transport layer.Later, 4 stars retained in the transport layer are calculated The corresponding accumulation branched measurement value of seat symbol, and replaced after this 4 accumulation branched measurement values are ranked up and be saved in BM In vector, the corresponding constellation symbol of this 4 accumulation branched measurement values is stored in X^leftThe 1st row.

(E) it is directed to each transport layer (i.e. the 4th layer and the 3rd layer) of serving cell: according to the 1st layer, the 2nd layer, the 3rd layer and the 4 constellation symbol (the i.e. X retained respectively in 4 layers of transport layer^left4 × 4 constellation symbols of middle preservation) and BM vector in most The 4 accumulation branched measurement values newly saved determine that a constellation symbol in corresponding 4 constellation symbols of the transport layer is used as and are somebody's turn to do The search result of transport layer, and determine the corresponding soft bit information of search result of the transport layer of serving cell.

Referring to fig. 4, the embodiment of the invention provides a kind of signal supervisory instruments, comprising:

First determination unit 11 successively carries out the traversal search of constellation symbol for the transport layer to serving cell, determines The M constellation symbol that each transport layer of the serving cell retains；Wherein, M is positive integer；

Second determination unit 12, the M constellation symbol for being retained according to each transport layer of the serving cell determine The M constellation symbol that each transport layer of interfered cell retains, wherein, should determining for each transport layer of interfered cell During the M constellation symbol that transport layer retains, calculating is by m-th of constellation symbol retaining in the transport layer, and in determination The common structure of m-th of constellation symbol retained in fixed each transport layer before the M constellation symbol retained in the transport layer At m-th of constellation symbol combination, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }；

Third determination unit 13, for being directed to each transport layer of serving cell: according to the interfered cell and servicing small The M constellation symbol that each transport layer in area retains, and the M that the constellation symbol by retaining in fixed each transport layer forms A constellation symbol combines corresponding accumulation branched measurement value, determines one in the corresponding multiple constellation symbols of the transport layer Search result of the constellation symbol as the transport layer, and determine the corresponding soft bit information of search result of the transport layer.

The device for example can be NAICS receiver.

Preferably, first determination unit 11, which successively carries out constellation symbol in the transport layer to serving cell, searches for it Before, it is also used to:

Preferably, first determination unit 11 is by the corresponding each column of serving cell in the united channel estimate matrix Channel estimation value is discharged to the right side of the matrix, and the corresponding each column channel in interfered cell is estimated in the united channel estimate matrix When evaluation is discharged to the left side of the matrix, it is specifically used for:

Preferably, second determination unit 12 is accorded with according to the M constellation that each transport layer of the serving cell retains Number, when determining the M constellation symbol that each transport layer of interfered cell retains, it is specifically used for:

Preferably, second determination unit 12 calculates the star by retaining in fixed each transport layer according to the following formula M constellation symbol of seat symbol composition combines corresponding judgement amount:

Preferably, second determination unit 12 is directed to each transport layer of interfered cell, transport layer reservation is being determined M constellation symbol during, calculate by m-th of constellation symbol retaining in the transport layer, and in determining the transport layer M-th of star that m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol of reservation collectively forms Seat symbol combination, when corresponding accumulation branched measurement value, is specifically used for:

For each transport layer of interfered cell:

Preferably, second determination unit 12 is directed to each transport layer of interfered cell: according to fixed each biography The constellation symbol that defeated layer retains calculates m-th of constellation symbol by retaining in the transport layer, retains in determining the transport layer M constellation symbol before m-th of constellation symbol for collectively forming of m-th of constellation symbol retaining in fixed each transport layer Number combination, when the increment of corresponding branched measurement value, is specifically used for:

Wherein, bm_i(m) it indicates by m-th of constellation symbol retaining in i-th layer of transport layer, and is determining i-th layer of transport layer Collectively form m-th of m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol of middle reservation Constellation symbol combines the increment of corresponding branched measurement value, and i indicates the number of interfered cell current transmission layer；It indicates equivalent to connect Receive i-th of element in signal vector；Indicate m-th of the constellation symbol retained in i-th layer of transport layer；N_LIndicate that service is small Total number of plies of the transport layer in area and interfered cell；X^leftIt is initially empty matrix, and is searched carrying out constellation symbol to transport layer every time The constellation symbol combination of reservation is stored in X after rope^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIt indicates The element of the i-th row jth column in the R matrix that QR is decomposed is carried out to received signal vector in advance；r_i,iIt indicates in the R matrix The element of i-th row i-th column.

Preferably, second determination unit 12 is directed to each transport layer of interfered cell, calculating by the transport layer M-th of the constellation symbol retained, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol that m-th of constellation symbol of middle reservation collectively forms combines, after corresponding accumulation branched measurement value, also For:

In the embodiment of the present invention, above-mentioned each functional unit can be realized by entity devices such as specific hardware processors.

Referring to Fig. 5, the embodiment of the invention also provides a kind of signal supervisory instrument, which for example can be UE.

Processor 301 executes following process for reading the program in memory 304:

The signal of serving cell and interfered cell transmission is received by transceiver 302, and the signal received is examined It surveys.

The processor 301 is specifically used for when detecting to the signal received:

Preferably, the processor 301 is also used before the transport layer to serving cell successively carries out constellation symbol search In:

Preferably, the processor 301 is by the corresponding each column channel of serving cell in the united channel estimate matrix Estimated value is discharged to the right side of the matrix, the corresponding each column channel estimation value in interfered cell in the united channel estimate matrix When being discharged to the left side of the matrix, it is specifically used for:

For the corresponding each column channel estimation value of serving cell in the united channel estimate matrix: believing according to each column The descending sequence of the corresponding performance number of road estimated value, is successively arranged since the right side of the matrix to the left；And for institute State the corresponding each column channel estimation value in interfered cell in united channel estimate matrix: corresponding according to each column channel estimation value The ascending sequence of performance number is successively arranged to the right since the matrix left side.

Preferably, the M constellation symbol that the processor 301 retains according to each transport layer of the serving cell, really When determining the M constellation symbol of each transport layer reservation of interfered cell, it is specifically used for:

Preferably, the processor 301 calculates the constellation symbol by retaining in fixed each transport layer according to the following formula The corresponding judgement amount of M constellation symbol combination of number composition:

Wherein,In indicating to be combined by the M constellation symbol that the constellation symbol retained in fixed each transport layer forms M-th of constellation symbol combine the corresponding judgement amount in i-th layer of transport layer, i indicates the number of interfered cell current transmission layer； Y~_iIndicate i-th of element in equivalent received signals vector；N_LIndicate total layer of the transport layer of serving cell and interfered cell Number；X^leftIt is initially empty matrix, and combines the constellation symbol of reservation after carrying out constellation symbol search to transport layer every time and protects There are X^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIt indicates to carry out QR points to received signal vector in advance The element that the i-th row jth arranges in the R matrix that solution obtains；r_i,iIndicate the element that the i-th row i-th arranges in the R matrix.

Preferably, the processor 301 is directed to each transport layer of interfered cell, determining that the M that the transport layer retains is a It during constellation symbol, calculates by m-th of constellation symbol retaining in the transport layer, and retains in determining the transport layer M-th of constellation symbol that m-th of the constellation symbol retained in fixed each transport layer before M constellation symbol collectively forms Combination when corresponding accumulation branched measurement value, is specifically used for:

For each transport layer of interfered cell:

Preferably, the processor 301 is directed to each transport layer of interfered cell: being protected according to fixed each transport layer The constellation symbol stayed, calculates by m-th of constellation symbol retaining in the transport layer, with retain in determining the transport layer M M-th of constellation symbol group that m-th of the constellation symbol retained in fixed each transport layer before constellation symbol collectively forms It closes, when the increment of corresponding branched measurement value, is specifically used for:

Preferably, the processor 301 is directed to each transport layer of interfered cell, calculating by retaining in the transport layer Retain in m-th of constellation symbol, with fixed each transport layer before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that collectively forms of m-th of constellation symbol, after corresponding accumulation branched measurement value, be also used to:

In Fig. 5, bus architecture (is represented) with bus 300, and bus 300 may include the bus of any number of interconnection And bridge, the storage that bus 300 will include the one or more processors represented by general processor 301 and memory 304 represents The various circuits of device link together.Bus 300 can also will such as peripheral equipment, voltage-stablizer and management circuit or the like Various other circuits link together, these are all it is known in the art, therefore, is no longer further retouched to it herein It states.Bus interface 303 provides interface between bus 300 and transceiver 302.Transceiver 302 can be an element, can also be with It is multiple element, such as multiple receivers and transmitter, the list for communicating over a transmission medium with various other devices is provided Member.Such as: transceiver 302 receives external data from other equipment.Transceiver 302 is used for treated the data of processor 301 It is sent to other equipment.Depending on the property of computing system, user interface 305 can also be provided, for example, keypad, display, Loudspeaker, microphone, control stick.

Processor 301 is responsible for management bus 300 and common processing, and the general-purpose operating system is run as described in aforementioned.And it deposits Reservoir 304 can be used for the used data when executing operation of storage processor 301.

Optionally, processor 301 for example can be centre and bury device (CPU), specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or Complex Programmable Logic Devices (Complex Programmable Logic Device, CPLD) etc..

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.) Formula.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of signal detecting method, which is characterized in that this method comprises:

The traversal search that constellation symbol is successively carried out to the transport layer of serving cell determines that each transport layer of the serving cell is protected The M constellation symbol stayed；Wherein, M is positive integer；

According to the M constellation symbol that each transport layer of the serving cell retains, determine that each transport layer of interfered cell is protected The M constellation symbol stayed, wherein for each transport layer of interfered cell, in M constellation symbol for determining that the transport layer retains During, m-th of constellation symbol by retaining in the transport layer is calculated, with the M constellation retained in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in fixed each transport layer before symbol collectively forms, it is right The accumulation branched measurement value answered；Wherein, m ∈ { 1 ..., M }；

For each transport layer of serving cell: M retained according to each transport layer of the interfered cell and serving cell Constellation symbol, and M constellation symbol forming of the constellation symbol by retaining in fixed each transport layer are combined and are respectively corresponded Accumulation branched measurement value, determine a constellation symbol in the corresponding multiple constellation symbols of the transport layer as the transport layer Search result, and determine the corresponding soft bit information of search result of the transport layer；

Wherein, the M constellation symbol retained according to each transport layer of the serving cell, determines each transmission of interfered cell The M constellation symbol that layer retains, specifically includes:

For each transport layer of interfered cell: the M constellation symbol retained according to fixed each transport layer is calculated by M constellation symbol of the constellation symbol composition retained in determining each transport layer combines corresponding biography in interfered cell The judgement amount of defeated layer；

For each judgement amount in the M judgement amounts, hard decision is carried out to the judgement amount, obtains the corresponding star of the judgement amount Seat symbol, and the M constellation symbol that the corresponding constellation symbol of each judgement amount is retained as the transport layer of interfered cell Number.

2. the method according to claim 1, wherein the transport layer to serving cell successively carries out constellation symbol Number search before, this method further include:

Each column channel estimation value in united channel estimate matrix is ranked up, it will be in the united channel estimate matrix The corresponding each column channel estimation value of serving cell is discharged to the right side of the matrix, interferes in the united channel estimate matrix small The corresponding each column channel estimation value in area is discharged to the left side of the matrix.

3. according to the method described in claim 2, it is characterized in that, by serving cell pair in the united channel estimate matrix Each column channel estimation value answered is discharged to the right side of the matrix, and interfered cell is corresponding each in the united channel estimate matrix Column channel estimation value is discharged to the left side of the matrix, specifically includes:

For the corresponding each column channel estimation value of serving cell in the united channel estimate matrix: estimating according to each column channel The descending sequence of the corresponding performance number of evaluation, is successively arranged since the right side of the matrix to the left；And for described The corresponding each column channel estimation value in interfered cell in the channel estimate matrix of conjunction: according to the corresponding power of each column channel estimation value It is worth ascending sequence, is successively arranged to the right since the left side of the matrix.

4. the method according to claim 1, wherein being calculated according to the following formula by fixed each transport layer M constellation symbol of the constellation symbol composition of reservation combines corresponding judgement amount:

Wherein,Indicate the m in being combined by the M constellation symbol that the constellation symbol retained in fixed each transport layer forms A constellation symbol combines the corresponding judgement amount in i-th layer of transport layer, and i indicates the number of interfered cell current transmission layer；Table Show i-th of element in equivalent received signals vector；N_LIndicate total number of plies of the transport layer of serving cell and interfered cell；X^left It is initially empty matrix, and the constellation symbol combination of reservation is stored in X after carrying out constellation symbol search to transport layer every time^left In；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIt indicates to carry out what QR was decomposed to received signal vector in advance The element that the i-th row jth arranges in R matrix；r_i,iIndicate the element that the i-th row i-th arranges in the R matrix.

5. determining the biography the method according to claim 1, wherein being directed to each transport layer of interfered cell During the M constellation symbol that defeated layer retains, m-th of constellation symbol by retaining in the transport layer is calculated, is somebody's turn to do with determining M-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in transport layer collectively forms The combination of m-th of constellation symbol, corresponding accumulation branched measurement value specifically includes:

For each transport layer of interfered cell:

According to the constellation symbol that fixed each transport layer retains, m-th of constellation symbol by retaining in the transport layer is calculated, It is accorded with m-th of the constellation retained in fixed each transport layer before M constellation symbol retaining in determining the transport layer The combination of number m-th of the constellation symbol collectively formed, the increment of corresponding branched measurement value；

The increment for combining m-th of constellation symbol corresponding branched measurement value, and by retaining in fixed each transport layer Constellation symbol composition the combination of M constellation symbol in m-th of constellation symbol combine the addition of corresponding accumulation branched measurement value, Obtain m-th of constellation symbol by retaining in the transport layer, with before M constellation symbol retaining in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in determining each transport layer collectively forms, corresponding iterated integral Branch metric.

6. according to the method described in claim 5, it is characterized in that, being directed to each transport layer of interfered cell: according to having determined that The constellation symbol that retains of each transport layer, calculate by m-th of constellation symbol retaining in the transport layer, and determining the transmission The m that m-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in layer collectively forms A constellation symbol combination, the increment of corresponding branched measurement value specifically include:

For each transport layer of interfered cell: it calculates according to the following formula by retaining m-th of constellation symbol in the transport layer, with M-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in determining the transport layer M-th of constellation symbol combination collectively formed, the increment of corresponding branched measurement value:

Wherein, bm_i(m) it indicates to be protected by m-th of the constellation symbol retained in i-th layer of transport layer in determining i-th layer of transport layer M-th of constellation that m-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol stayed collectively forms The increment of the corresponding branched measurement value of symbol combination, i indicate the number of interfered cell current transmission layer；Indicate equivalent received letter I-th of element in number vector；Indicate m-th of the constellation symbol retained in i-th layer of transport layer；N_LIt indicates serving cell and does Disturb total number of plies of the transport layer of cell；X^leftIt is initially empty matrix, and will after carrying out constellation symbol search to transport layer every time The constellation symbol combination of reservation is stored in X^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jTo dock in advance Receive the element that signal vector carries out the i-th row jth column in the R matrix that QR is decomposed；r_i,iIt is arranged for the i-th row i-th in the R matrix Element.

7. the method according to claim 1, wherein each transport layer for interfered cell, is calculating By m-th of the constellation symbol retained in the transport layer, and had determined that before M constellation symbol retaining in determining the transport layer Each transport layer in m-th of constellation symbol combination that collectively forms of m-th of constellation symbol retaining, corresponding accumulation degree of branching After magnitude, this method further include:

For each transport layer of interfered cell: by m-th of constellation symbol by retaining in the transport layer, and determining the transmission The m that m-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in layer collectively forms A constellation symbol combination, corresponding accumulation branched measurement value are ranked up according to sequence from small to large.

8. a kind of signal supervisory instrument, which is characterized in that the device includes:

First determination unit successively carries out constellation symbol search for the transport layer to serving cell, determines the serving cell The M constellation symbol that each transport layer retains；Wherein, M is positive integer；

Second determination unit, the M constellation symbol for being retained according to each transport layer of the serving cell determine that interference is small The M constellation symbol that each transport layer in area retains, wherein for each transport layer of interfered cell, determining the transport layer It during M constellation symbol of reservation, calculates by m-th of constellation symbol retaining in the transport layer, and is determining the transmission The m that m-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol retained in layer collectively forms A constellation symbol combination, corresponding accumulation branched measurement value；Wherein, m ∈ { 1 ..., M }；

Third determination unit, for being directed to each transport layer of serving cell: according to the every of the interfered cell and serving cell The M constellation symbol that one transport layer retains, and the M constellation that the constellation symbol by retaining in fixed each transport layer forms The corresponding accumulation branched measurement value of symbol combination determines the constellation symbol in the corresponding multiple constellation symbols of the transport layer Search result number as the transport layer, and determine the corresponding soft bit information of search result of the transport layer；

Wherein, the M constellation symbol that second determination unit retains according to each transport layer of the serving cell determines dry When disturbing the M constellation symbol of each transport layer reservation of cell, it is specifically used for:

For each transport layer of interfered cell: the M constellation symbol retained according to fixed each transport layer is calculated by M constellation symbol of the constellation symbol composition retained in determining each transport layer combines the corresponding judgement in the transport layer Amount；

9. device according to claim 8, which is characterized in that first determination unit is in the transport layer to serving cell Before successively carrying out constellation symbol search, it is also used to:

10. device according to claim 9, which is characterized in that first determination unit estimates the united channel The corresponding each column channel estimation value of serving cell is discharged to the right side of the matrix, the united channel estimate matrix in meter matrix When the corresponding each column channel estimation value in middle interfered cell is discharged to the left side of the matrix, it is specifically used for:

11. device according to claim 8, which is characterized in that second determination unit calculate according to the following formula by M constellation symbol of the constellation symbol composition retained in fixed each transport layer combines corresponding judgement amount:

12. device according to claim 8, which is characterized in that second determination unit is each for interfered cell Transport layer calculates m-th of star by retaining in the transport layer during determining the M constellation symbol that the transport layer retains Seat symbol, with retain in fixed each transport layer before M constellation symbol retaining in determining the transport layer m-th The combination of m-th of constellation symbol that constellation symbol collectively forms when corresponding accumulation branched measurement value, is specifically used for:

For each transport layer of interfered cell:

13. device according to claim 12, which is characterized in that second determination unit is each for interfered cell Transport layer: the constellation symbol retained according to fixed each transport layer is calculated and is accorded with by m-th of the constellation retained in the transport layer Number, with m-th of the constellation retained in fixed each transport layer before M constellation symbol retaining in determining the transport layer The combination of m-th of constellation symbol that symbol collectively forms when the increment of corresponding branched measurement value, is specifically used for:

Wherein, bm_i(m) it indicates to be protected by m-th of the constellation symbol retained in i-th layer of transport layer in determining i-th layer of transport layer M-th of constellation that m-th of the constellation symbol retained in fixed each transport layer before the M constellation symbol stayed collectively forms The increment of the corresponding branched measurement value of symbol combination, i indicate the number of interfered cell current transmission layer；Indicate equivalent received letter I-th of element in number vector；Indicate m-th of the constellation symbol retained in i-th layer of transport layer；N_LIt indicates serving cell and does Disturb total number of plies of the transport layer of cell；X^leftIt is initially empty matrix, and will after carrying out constellation symbol search to transport layer every time The constellation symbol combination of reservation is stored in X^leftIn；X^left(j, m) is X^leftThe element of middle jth row m column；r_i,jIndicate right in advance Received signal vector carries out the element of the i-th row jth column in the R matrix that QR is decomposed；r_i,iIndicate the i-th row in the R matrix The element of i column.

14. device according to claim 8, which is characterized in that second determination unit is each for interfered cell Transport layer is calculating m-th of constellation symbol by retaining in the transport layer, with the M constellation retained in determining the transport layer M-th of constellation symbol combination that m-th of the constellation symbol retained in fixed each transport layer before symbol collectively forms, it is right After the accumulation branched measurement value answered, it is also used to: