CN106411796A - Multi-terminal signal detection method in non-orthogonal multiple access, and base station - Google Patents
Multi-terminal signal detection method in non-orthogonal multiple access, and base station Download PDFInfo
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Abstract
The invention discloses a multi-terminal signal detection method in non-orthogonal multiple access, and a base station, and is used for reducing the complexity for detecting multi-terminal data signals in the multi-antenna reception condition in the non-orthogonal multiple access. The method includes: the base station determines the number of receiving antennas which satisfy the current detection performance and enable the detection complexity to be the lowest; the receiving antennas are selected from a candidate receiving antenna set according to the determined number of the receiving antennas; and channel estimation of each selected receiving antenna is performed, a channel estimation matrix of each selected receiving antenna is obtained, and data signals corresponding to a plurality of terminals for time-frequency resource multiplexing are determined according to the channel estimation matrix of each selected receiving antenna and a receiving signal of each selected receiving antenna, wherein rows of the channel estimation matrix represent multiplexed time-frequency resources, and columns of the channel estimation matrix represent a plurality of terminals multiplexed on a plurality of time-frequency resources corresponding to one row of the channel estimation matrix.
Description
Technical field
The present invention relates to non-orthogonal multiple technical field, multiple terminals in more particularly, to a kind of non-orthogonal multiple access
Signal detecting method and base station.
Background technology
With the fast development of radio communication, number of users and portfolio are in explosive growth, and this is to wireless network
Power system capacity higher requirement is constantly proposed.Industry research predicts, annual mobile data services flow is to turn over
Speed again increases, and about 50,000,000,000 terminals will be had to access mobile radio networks to the year two thousand twenty whole world.Blast
Property user increase and make multiple access technique become the central issue of network upgrade.Multiple access technique determines
The basic capacity of network, and system complexity and lower deployment cost had greatly affect.
Traditional mobile communication (1G-4G) adopts orthogonal multiple access technique, such as frequency division multiple access, and the time-division is many
Location, CDMA, orthogonal frequency division multiplexing multiple access.From multi-user information theory from the perspective of, traditional just
Friendship mode can only achieve the interior boundary of multi-user's capacity circle, causes wireless resource utility efficiency than relatively low.
Pattern segmentation non-orthogonal multiple accesses (Pattern Division Multiple Access, PDMA) referred to as
Figure point multiple access, is a kind of non-orthogonal multiple access technology, is based on multi-user comm global optimization, leads to
Cross transmitting terminal and the technology of receiving terminal Combined Treatment.In transmitting terminal, the non-orthogonal feature based on multiple signal domain
Pattern is distinguishing user；In receiving terminal, based on the feature structure of user's pattern, deleted using serial interference
(SIC, Serial Interference Cancellation) mode realizing Multiuser Detection, thus accomplishing multiplex
Family in the multiplexing further of existing time-frequency wireless resource, in order to solve only to there is orthogonal manner in prior art
The interior boundary of multi-user's capacity circle can be reached, cause wireless resource utility efficiency than relatively low problem.
In PDMA, transmitting terminal is transmitted to the signal of one or more terminals processing；After transmission processe
The signal of one or more terminals carry out non-orthogonal feature pattern mapping, so that the signal of different terminals is right
Answer Radio Resource superposition, and according to non-orthogonal feature pattern mapping result, after transmission processe or
The signal of multiple terminals.Signal due to can make one or more terminals carries out non-orthogonal in Radio Resource
Superposition is it is achieved that non-orthogonal multiple accesses transmission, thus improve wireless resource utility efficiency.
In PDMA, receiving terminal carries out non-orthogonal feature pattern inspection to the signal receiving corresponding to multiple terminals
Survey, determine the signal corresponding non-orthogonal feature pattern receiving；Using the non-orthogonal feature pattern detecting,
The multiple terminals detection of SIC mode is carried out to the signal of the reception receiving, and carries out reception processing, determine different
The data of terminal.
Wherein receiving terminal is generally detected using belief propagation (Belief Propagation, BP) algorithm.
Taking the uplink of two reception antennas of a transmission antenna as a example, as shown in figure 1, signal model is fixed
Justice as equation 1 below, 2 and 3：
xT=[x1x2x3] (1)
Wherein, x1Represent the sending signal of user 1, x2Represent the sending signal of user 2, x3Represent user
3 sending signal,Represent the receipt signal on two running time-frequency resource units (RE) of antenna 1,Represent the receipt signal on two running time-frequency resource units (RE) of antenna 2.
U node in the variable node of BP algorithm such as Fig. 1, the c node in observer nodes such as Fig. 1.Become
The number of amount node is equal to the number of the user of multiplexing on identical running time-frequency resource.
BP algorithm is the high-performance height that one kind approaches maximum likelihood (Maximum Likelihood, ML)
Complexity nonlinear multiuser detection algorithm, the generally complexity of its detection (are multiplexed phase with variable node
With running time-frequency resource user) number be exponentially increased.
It can be seen that, when the user's number being multiplexed identical running time-frequency resource is more, multiple antennas receive feelings to PDMA system
The complexity that under condition, receiving terminal is detected using BP algorithm is higher.
Content of the invention
The embodiment of the present invention provides multiple terminals signal detecting method and base station in a kind of non-orthogonal multiple access, uses
To reduce the complexity that non-orthogonal multiple accesses detection multiple terminals data signal under multiple antennas reception condition.
Concrete technical scheme provided in an embodiment of the present invention is as follows：
First aspect, there is provided a kind of non-orthogonal multiple accesses multiple terminals signal detecting method, including：
Base station determines and meets current detection performance and make the minimum reception antenna number of detection complexity；
Described base station selects reception antenna according to the reception antenna number determining from candidate's reception antenna set；
Described base station carries out channel estimation to the every reception antenna selecting respectively, obtains every reception of selection
The respective channel estimate matrix of antenna, according to select the respective channel estimate matrix of every reception antenna and
The respective receipt signal of every reception antenna selecting, determination carries out multiple terminals of running time-frequency resource multiplexing each
Corresponding data signal, wherein, the row of described channel estimate matrix represents the running time-frequency resource of multiplexing, described letter
The row of channel estimation matrix represent multiplexing on the corresponding multiple running time-frequency resources of a line of described channel estimate matrix
Multiple terminals.
In enforcement, described base station determines and meets current detection performance and make the minimum reception of detection complexity
Antenna number, including：
Described base station is according to current input condition correspondence default detection performance and detection complexity and reception
The corresponding relation of antenna number, determines and meets current detection performance and detection complexity is corresponding when minimum connects
Receive antenna number；
Or,
Described base station, according to the configuration parameter of Operation ＆ Maintenance System, determines and meets current detection performance and make
The minimum reception antenna number of detection complexity.
In enforcement, described base station selects to connect from candidate's reception antenna set according to the reception antenna number determining
Receive antenna, including：
Described base station receives each institute respectively according to each reception antenna in described candidate's reception antenna set
State the performance of the signal of terminal, select the reception antenna of described determination from described candidate's reception antenna set
Several reception antennas.
In enforcement, described base station receives respectively according to each reception antenna in described candidate's reception antenna set
The performance of the signal of each described terminal, selects the reception of described determination from described candidate's reception antenna set
Antenna number reception antenna, including：
Described base station selects each described terminal each self-corresponding from described candidate's reception antenna set respectively
First setting number reception antenna, obtains the first reception antenna set, wherein, the first setting number of selection
Mesh reception antenna receives the performance of the signal of described terminal, better than its in described candidate's reception antenna set
Its reception antenna receives the performance of the signal of described terminal；
Described base station determines the selected number of times of each reception antenna in described first reception antenna set, according to
Described selected number of times selects the reception antenna of described determination several from described first reception antenna set
Reception antenna, described first sets the reception antenna number that number is not less than described determination.
In enforcement, described base station is according to the respective channel estimate matrix of every reception antenna selecting and selection
The respective receipt signal of every reception antenna, determine that carrying out multiple terminals of running time-frequency resource multiplexing each corresponds to
Data signal, including：
According to the respective channel estimate matrix of every reception antenna selecting, described base station determines that combined channel is estimated
Meter matrix；
Described base station according to select the respective receipt signal of every reception antenna determine combined received signal to
Amount；
Described joint channel estimation matrix and described combined received signal vector are calculated by described base station as detection
The |input paramete of method algorithm, obtains, using the detection of described detection algorithm, the multiple terminals carrying out running time-frequency resource multiplexing
Each self-corresponding data signal.
In enforcement, described detection algorithm is defined maximum likelihood ML algorithm or maximum likelihood ML algorithm.
In enforcement, described base station determines joint according to the respective channel estimate matrix of every reception antenna selecting
Channel estimate matrix, including：
Described base station is respectively by the respective channel estimate matrix of every reception antenna selecting and PDMA pattern
The element dot product of matrix correspondence position, obtains described joint channel estimation matrix.
In enforcement, described input condition includes the following combination of any one or more：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, the overload of PDMA pattern matrix
Rate and adjacent cell interference level.
In enforcement, if the corresponding current input condition of each described terminal differs, described base station is according to current
Input condition correspondence default detection performance and the corresponding relation of detection complexity and reception antenna number, really
Surely meet current detection performance and detection complexity corresponding reception antenna number when minimum, including：
Described base station is directed to each described terminal, corresponding default according to the corresponding current input condition of described terminal
Detection performance and detection complexity and reception antenna number corresponding relation, determine meet current detection
Performance and described terminal corresponding first reception antenna number when detection complexity is minimum；
Maximum in the corresponding first antenna number of described each described terminal base station selected, by described maximum
Value is defined as meeting the current detection performance of each described terminal and detection complexity is corresponding when minimum connects
Receive antenna number.
A kind of second aspect, there is provided base station, including：
Antenna number determining module, meets current detection performance and makes detection complexity minimum for determining
Reception antenna number；
Selecting module, for selecting from candidate's reception antenna set according to the reception antenna number determining to receive
Antenna；
Signal determining module, for carrying out channel estimation to the every reception antenna selecting respectively, obtains and selects
The respective channel estimate matrix of every reception antenna, according to select the respective channel of every reception antenna estimate
Meter matrix and the respective receipt signal of every reception antenna of selection, determine and carry out the many of running time-frequency resource multiplexing
The each self-corresponding data signal of individual terminal, wherein, the row of described channel estimate matrix represents the time-frequency money of multiplexing
Source, the row of described channel estimate matrix represent the corresponding multiple time-frequency moneys of a line in described channel estimate matrix
Multiple terminals of multiplexing on source.
In enforcement, described antenna number determining module is used for：
According to current input condition correspondence default detection performance and detection complexity and reception antenna number
Corresponding relation, determine and meet current detection performance and detection complexity corresponding reception antenna when minimum
Number；
Or,
According to the configuration parameter of Operation ＆ Maintenance System, determine and meet current detection performance and make detection of complex
Spend minimum reception antenna number.
In enforcement, described selecting module is used for：
Each described terminal is received respectively according to each reception antenna in described candidate's reception antenna set
The performance of signal, selects the several receptions of reception antenna of described determination from described candidate's reception antenna set
Antenna.
During one is embodied as, described selecting module is used for：
Each described terminal each self-corresponding first is selected to set from described candidate's reception antenna set respectively
Number reception antenna, obtains the first reception antenna set, and wherein, the first setting number of selection receives
Antenna receives the performance of the signal of described terminal, better than the other reception skies in described candidate's reception antenna set
Line receives the performance of the signal of described terminal；
Determine the selected number of times of each reception antenna in described first reception antenna set, according to described selected
Select the several reception antennas of reception antenna that number of times selects described determination from described first reception antenna set,
Described first sets the reception antenna number that number is not less than described determination.
In enforcement, described signal determining module is used for：
The respective channel estimate matrix of every reception antenna according to selecting determines joint channel estimation matrix；
The respective receipt signal of every reception antenna according to selecting determines combined received signal vector；
Using described joint channel estimation matrix and described combined received signal vector as detection algorithm algorithm
|input paramete, is each corresponded to using multiple terminals that the detection acquisition of described detection algorithm carries out running time-frequency resource multiplexing
Data signal.
Wherein, described detection algorithm is defined maximum likelihood ML algorithm or maximum likelihood ML algorithm.
Specifically, described signal determining module is used for：
Respectively will be corresponding with PDMA pattern matrix for the respective channel estimate matrix of every reception antenna selecting
The element dot product of position, obtains described joint channel estimation matrix.
Wherein, described input condition includes the following combination of any one or more：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, the overload of PDMA pattern matrix
Rate and adjacent cell interference level.
In enforcement, antenna number determining module is used for：
If the corresponding current input condition of each described terminal differs,
For terminal each described, default detection is corresponded to according to the corresponding current input condition of described terminal
Can determine and meet current detection performance and inspection with the corresponding relation of detection complexity and reception antenna number
Survey complexity minimum when the corresponding first reception antenna number of described terminal；
Select the maximum in the corresponding first antenna number of each described terminal, described maximum is defined as
Meet the current detection performance of each described terminal and detection complexity corresponding reception antenna when minimum
Number.
Based on technique scheme, in the embodiment of the present invention, base station determination meets current detection performance and inspection
Corresponding reception antenna number when survey complexity is minimum, receives sky according to the reception antenna number determining from candidate
Reception antenna is selected, the channel estimation based on the reception antenna selecting and receipt signal are detected in line set
Obtain each self-corresponding data signal of multiple terminals carrying out running time-frequency resource multiplexing such that it is able to ensure detection
In the case of performance, reduce and detect answering of user data signal under non-orthogonal multiple access multiple antennas reception condition
Miscellaneous degree.
Brief description
Fig. 1 is the signal model schematic diagram that 3 users are multiplexed 2 running time-frequency resources；
Fig. 2 is the method flow schematic diagram that in the embodiment of the present invention, base station carries out Multiuser Detection；
Fig. 3 is architecture of base station schematic diagram in the embodiment of the present invention；
Fig. 4 is another architecture of base station schematic diagram in the embodiment of the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing to this
Bright be described in further detail it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The all other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of protection of the invention.
In following examples, the process of Multiuser Detection in non-orthogonal multiple access is entered taking PDMA as a example
Row explanation, it should be noted that the Multiuser Detection process that following examples are provided can also be applied to it
His non-orthogonal multiple access technology, is not limited in PDMA.
In the embodiment of the present invention, as shown in Fig. 2 base station carries out multiple terminals detection during non-orthogonal multiple accesses
Method detailed flow process is as follows：
Step 201：Base station determines and meets current detection performance and make the minimum reception sky of detection complexity
Line number.
Wherein, detection performance includes transmitting Block Error Rate (BLER) and handling capacity etc..
Detection complexity is specially multiplying amount, the amount of addition operations and comparison operation amount.
In enforcement, current detection performance pre-sets, and can be specifically to be entered according to present type of service
Row setting.
In enforcement, base station determines and meets current detection performance and make the minimum reception antenna of detection complexity
The embodiment of number is including but not limited to following two：
First, base station is according to current input condition correspondence default detection performance and detection complexity and reception
The corresponding relation of antenna number, determines and meets current detection performance and detection complexity is corresponding when minimum connects
Receive antenna number.
Wherein, the including but not limited to following combination of any one or more of described input condition：Detection algorithm,
The modulation coding mode of terminal, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and adjacent cell are done
Disturb level.Wherein, in PDMA pattern matrix, the value of each element is 0 or 1, if value is 1,
Data is had to map, value is 0 then it represents that not having data to map, every a line of PDMA pattern matrix represents
Different Resource Units (RE), each row represent a data Layer, and each terminal use can take 1
Or multiple data Layer, and each data Layer can only take by a terminal use.
In being embodied as, in the case of the multiplexing time-frequency resource of multiple terminals, corresponding multiplexing time-frequency resource each
The input condition of terminal may identical it is also possible to different.
If the input condition of each terminal of corresponding multiplexing time-frequency resource is identical, corresponded to according to this input condition
Default detection performance and the corresponding relation of detection complexity and reception antenna number, determination meets current
Detection performance and detection complexity corresponding reception antenna number when minimum.
If the input condition of each terminal of corresponding multiplexing time-frequency resource differs, for each terminal, according to
The corresponding current input condition correspondence default detection performance of this terminal and detection complexity and reception antenna
The corresponding relation of number, determines and meets current detection performance and detection complexity corresponding reception sky when minimum
Line number, as first antenna number, selects the maximum in each terminal corresponding first antenna number, will
This maximum be defined as meeting the current detection performance of each described terminal and detection complexity minimum when pair
The reception antenna number answered, that is, as the antenna of the data signal of multiple terminals of final detection time-frequency multiplexing
Number so that ensure detection performance in the case of detection complexity minimum.
Second, described base station, according to the configuration parameter of Operation ＆ Maintenance System, determines and meets current detection performance
And make the minimum reception antenna number of detection complexity.
Specifically, Operation ＆ Maintenance System closes according to corresponding between the detection performance of base station and detection complexity
System, determines and meets the detection performance of base station and make the minimum reception antenna number of detection complexity, will determine
Reception antenna number be allocated to base station.
Step 202：Base station selects to receive according to the reception antenna number determining from candidate's reception antenna set
Antenna.
In enforcement, base station receives each respectively according to each reception antenna in described candidate's reception antenna set
The performance of the signal of described terminal, selects the reception antenna of described determination from described candidate's reception antenna set
Individual several reception antenna.
Wherein, the several reception antennas of reception antenna of described determination are selected from candidate's reception antenna set
Mode has multiple, for example, can randomly choose the reception antenna of described determination from candidate's reception antenna set
Several reception antennas are it is also possible to randomly choose described determination according to preset rules from candidate's reception antenna set
Reception antenna several reception antennas.
In one specific embodiment, base station selects each described end from described candidate's reception antenna set respectively
Hold each self-corresponding first setting number reception antenna, obtain the first reception antenna set, the first of selection
Set the performance that number reception antenna receives the signal of described terminal, better than described candidate's reception antenna set
In other reception antennas receive described terminals signal performance；Base station determines described first reception antenna collection
The selected number of times of each reception antenna in conjunction, according to described selected number of times from described first reception antenna collection
The several reception antennas of reception antenna of described determination are selected, described first sets number not less than described in conjunction
The reception antenna number determining.
Wherein, the performance of the signal of reception antenna receiving terminal, can be this receiving terminal of this reception antenna
The performance of signal or set duration in reception antenna receiving terminal signal performance.
Wherein, the performance of the signal of reception antenna receiving terminal, specifically can pass through receiving power or up letter
Make an uproar ratio determination, or determined by the combination of receiving power and up signal to noise ratio.Receiving power is higher, then connect
The performance receiving the signal of antenna receiving terminal is better, and up signal to noise ratio is higher, then reception antenna receiving terminal
The performance of signal is better.
Step 203：Base station carries out channel estimation to the every reception antenna selecting respectively, obtains the every of selection
The respective channel estimate matrix of root reception antenna, according to the every reception antenna respective channel estimation square selecting
Battle array and the respective receipt signal of every reception antenna selecting, determine the multiple ends carrying out running time-frequency resource multiplexing
Hold each self-corresponding data signal.
Wherein, the row of described channel estimate matrix represents the running time-frequency resource of multiplexing, described channel estimate matrix
Row represent multiple terminals of multiplexing on the corresponding multiple running time-frequency resources of a line of described channel estimate matrix.
In enforcement, base station determines combined channel according to the respective channel estimate matrix of every reception antenna selecting
Estimated matrix；Base station according to select the respective receipt signal of every reception antenna determine combined received signal to
Amount；Base station will be defeated as detection algorithm to described joint channel estimation matrix and described combined received signal vector
Enter parameter, the multiple terminals carrying out running time-frequency resource multiplexing using the detection acquisition of described detection algorithm are each self-corresponding
Data signal.
Alternatively, described detection algorithm is defined ML algorithm or ML algorithm, and wherein, quasi- ML algorithm is
Refer to the ML algorithm of fall complexity.
Specifically, base station is respectively by the respective channel estimate matrix of every reception antenna selecting and PDMA
The element dot product of pattern matrix correspondence position, obtains described joint channel estimation matrix.
The process of the Multiuser Detection embodiment of the present invention being provided below by way of a specific embodiment is entered
Row explanation.
It is assumed that terminal adopts single antenna to send in this specific embodiment, a up code word is mapped to one layer,
The extensive antenna one of base station has 128 reception antennas, and the modulation coding mode of destination end user is four
Item phase-shift keying (PSK) (QPSK) 1/3, the BLER performance of destination end user is 1%, the inspection that base station adopts
Method of determining and calculating is BP algorithm, and wireless channel conditions are macrocell Typical Urban non-direct projection footpath UMA NLOS, on
The PDMA pattern matrix that row is 233% using Overflow RateHT, i.e. PDMA [3,7], represent 3 identical time-frequencies
7 terminal uses are multiplexed on Resource Unit, this PDMA [3,7] is expressed as with formula (4)：
In this matrix, " 1 " indicates that data maps, and " 1 " expression mapping of same row is identical number
According to " 0 " represents no data mapping.Every a line represents different Resource Units (RE), each row expression 1
Individual data Layer, each terminal use can take 1 or multiple data Layer, and each data Layer can only
Used by 1 terminal use.
Step one, base station prestores preserves different input conditions corresponding detection performance and detection complexity
And the form of the corresponding relation of reception antenna number.
Specifically, by emulation by way of obtain the corresponding detection performance of different input conditions (CASE) and
Detection complexity and the corresponding relation of reception antenna number, wherein, input condition includes detection algorithm, end
The modulation coding mode of end subscriber, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and adjacent cell are done
Disturb level etc..
Specifically, different input conditions are numbered by input condition and are distinguished, as shown in table 1：
Table 1
Wherein, the corresponding pass of CASE1 corresponding detection performance and detection complexity and reception antenna number
System, as shown in table 2：
Table 2
Wherein, the corresponding pass of CASE2 corresponding detection performance and detection complexity and reception antenna number
System, as shown in table 3：
Table 3
Step 2, base station, in uplink receiving, determines that current input condition is CASE2, searches CASE2
Corresponding detection performance and the corresponding relation of detection complexity and reception antenna number, i.e. table 3, obtain full
The current detection performance of foot, i.e. target BLER=1%, and corresponding reception antenna when detection complexity is minimum
Number is it is assumed that this reception antenna number N is 2.
Step 3, base station, according to setting rule from candidate's reception antenna set, is selected in 128 reception antennas
Select out N=2 root reception antenna.
Specifically, base station is directed to each of 7 terminal uses being multiplexed same running time-frequency resource, from 128
N1=4 root is selected to receive the reception antenna of the best performance of signal of this terminal use in root reception antenna, and
Record selects the numbering of N1 root reception antenna；After traveling through each terminal, determine each reception sky of selection
The selected number of times of line, according to the numbering to the reception antenna selecting for the selected number of times order from high in the end
It is ranked up, selects to be chosen number of times highest N=2 root reception antenna according to the order determining, record selects
Selected number of times highest N=2 root reception antenna numbering.
Step 4, base station tectonic syntaxis channel estimate matrixWith combined received signal vector
Specifically, the reception antenna that base station is selected according to step 3, carries out channel estimation, construction connection respectively
The receipt signal tectonic syntaxis closing on channel estimate matrix, and the reception antenna selected according to step 3 connects
Receive signal vectorIt is expressed as follows with formula (5) and formula (6)：
WhereinIt is illustrated respectively in the receipt signal on three running time-frequency resources of the 1st reception antenna；It is illustrated respectively in the receipt signal on three running time-frequency resources of the 2nd reception antenna, subscript represents
User index number, subscript represents reception antenna call number；The dot product of " " representing matrix correspondence position element.
Wherein,Represent n-thrOriginal channel estimated matrix on root reception antenna, with formula (7)
It is expressed as：
Wherein,Represent n-thrOn root reception antenna, m-th terminal use be in n-th running time-frequency resource
On channel response.
Step 5, base station is by joint channel estimation matrixWith combined received signal vectorInput
BP detector is detected, obtains each self-corresponding data of 7 terminal uses carrying out running time-frequency resource multiplexing
Signal.
Based on same inventive concept, in the embodiment of the present invention, provide a kind of base station, being embodied as of this base station
Can be found in the description of said method embodiment part, repeat no more in place of repetition, as shown in figure 3, this base station
Main inclusion：
Antenna number determining module 301, meets current detection performance and makes detection complexity for determining
Minimum reception antenna number；
Selecting module 302, for selecting from candidate's reception antenna set according to the reception antenna number determining
Reception antenna；
Signal determining module 303, for carrying out channel estimation to the every reception antenna selecting respectively, obtains
The respective channel estimate matrix of every reception antenna selecting, according to the respective letter of every reception antenna selecting
The respective receipt signal of every reception antenna of channel estimation matrix and selection, determines and carries out running time-frequency resource multiplexing
The each self-corresponding data signal of multiple terminals, wherein, described channel estimate matrix row represent multiplexing when
Frequency resource, the row of described channel estimate matrix represent when a line of described channel estimate matrix is corresponding multiple
Multiple terminals of multiplexing in frequency resource.
In enforcement, described antenna number determining module 301 is used for：
According to current input condition correspondence default detection performance and detection complexity and reception antenna number
Corresponding relation, determine and meet current detection performance and detection complexity corresponding reception antenna when minimum
Number；
Or,
According to the configuration parameter of Operation ＆ Maintenance System, determine and meet current detection performance and make detection of complex
Spend minimum reception antenna number.
In enforcement, described selecting module 302 is used for：
Each described terminal is received respectively according to each reception antenna in described candidate's reception antenna set
The performance of signal, selects the several receptions of reception antenna of described determination from described candidate's reception antenna set
Antenna.
During one is embodied as, described selecting module 302 is used for：
Each described terminal each self-corresponding first is selected to set from described candidate's reception antenna set respectively
Number reception antenna, obtains the first reception antenna set, and wherein, the first setting number of selection receives
Antenna receives the performance of the signal of described terminal, better than the other reception skies in described candidate's reception antenna set
Line receives the performance of the signal of described terminal；
Determine the selected number of times of each reception antenna in described first reception antenna set, according to described selected
Select the several reception antennas of reception antenna that number of times selects described determination from described first reception antenna set,
Described first sets the reception antenna number that number is not less than described determination.
In enforcement, described signal determining module 303 is used for：
The respective channel estimate matrix of every reception antenna according to selecting determines joint channel estimation matrix；
The respective receipt signal of every reception antenna according to selecting determines combined received signal vector；
Using described joint channel estimation matrix and described combined received signal vector as detection algorithm algorithm
|input paramete, is each corresponded to using multiple terminals that the detection acquisition of described detection algorithm carries out running time-frequency resource multiplexing
Data signal.
Wherein, described detection algorithm is defined maximum likelihood ML algorithm or maximum likelihood ML algorithm.
Specifically, described signal determining module 303 is used for：
Respectively will be corresponding with PDMA pattern matrix for the respective channel estimate matrix of every reception antenna selecting
The element dot product of position, obtains described joint channel estimation matrix.
In enforcement, described input condition includes the following combination of any one or more：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, the overload of PDMA pattern matrix
Rate and adjacent cell interference level.
During one is embodied as, antenna number determining module 301 is used for：
If the corresponding current input condition of each described terminal differs,
For terminal each described, default detection is corresponded to according to the corresponding current input condition of described terminal
Can determine and meet current detection performance and inspection with the corresponding relation of detection complexity and reception antenna number
Survey complexity minimum when the corresponding first reception antenna number of described terminal；
Select the maximum in the corresponding first antenna number of each described terminal, described maximum is defined as
Meet the current detection performance of each described terminal and detection complexity corresponding reception antenna when minimum
Number.
Based on same inventive concept, in the embodiment of the present invention, provide a kind of base station, being embodied as of this base station
Can be found in the description of said method embodiment part, repeat no more in place of repetition, as shown in figure 4, this base station
Main inclusion processor 401 and memorizer 402, wherein, preserve default program in memorizer 402,
Processor 401 reads the program preserving in memorizer 402, according to this program performing procedure below：
Determine and meet current detection performance and make the minimum reception antenna number of detection complexity；
Reception antenna number according to determining selects reception antenna from candidate's reception antenna set；
Respectively channel estimation is carried out to the every reception antenna selecting, obtain every reception antenna of selection each
Channel estimate matrix, according to select the respective channel estimate matrix of every reception antenna and selection every
The respective receipt signal of root reception antenna, determines each self-corresponding number of multiple terminals carrying out running time-frequency resource multiplexing
It is believed that number, wherein, the row of described channel estimate matrix represents the running time-frequency resource of multiplexing, described channel estimation square
The row of battle array represent multiple ends of multiplexing on the corresponding multiple running time-frequency resources of a line of described channel estimate matrix
End.
In enforcement, processor 401 is according to current input condition correspondence default detection performance and detection complexity
And the corresponding relation of reception antenna number, determine meet current detection performance and detection complexity minimum when
Corresponding reception antenna number；Or, according to the configuration parameter of Operation ＆ Maintenance System, determination meets current
Detect performance and make the minimum reception antenna number of detection complexity.
In enforcement, processor 401 connects respectively according to each reception antenna in described candidate's reception antenna set
Receive the performance of the signal of each described terminal, from described candidate's reception antenna set, select connecing of described determination
Receive antenna number reception antenna.
During one is embodied as, processor 401 selects each institute from described candidate's reception antenna set respectively
State each self-corresponding first setting number reception antenna of terminal, obtain the first reception antenna set, wherein,
The the first setting number reception antenna selecting receives the performance of the signal of described terminal, connects better than described candidate
Receive the performance that the other reception antennas in antenna set receive the signal of described terminal；Determine described first reception
The selected number of times of each reception antenna in antenna set, according to described selected number of times from the described first reception
The several reception antennas of reception antenna of described determination are selected, described first setting number is not little in antenna set
Reception antenna number in described determination.
In enforcement, processor 401 determines connection according to the respective channel estimate matrix of every reception antenna selecting
Close channel estimate matrix；The respective receipt signal of every reception antenna according to selecting determines combined received signal
Vector；Using described joint channel estimation matrix and described combined received signal vector as detection algorithm algorithm
|input paramete, is each corresponded to using multiple terminals that the detection acquisition of described detection algorithm carries out running time-frequency resource multiplexing
Data signal.
Wherein, described detection algorithm is defined maximum likelihood ML algorithm or maximum likelihood ML algorithm.
Specifically, processor 401 respectively by select the respective channel estimate matrix of every reception antenna with
The element dot product of PDMA pattern matrix correspondence position, obtains described joint channel estimation matrix.
Wherein, described input condition includes the following combination of any one or more：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, the overload of PDMA pattern matrix
Rate and adjacent cell interference level.
During one is embodied as, if the corresponding current input condition of each described terminal differs, processor 401
For terminal each described, according to the corresponding current input condition correspondence default detection performance of described terminal and
Detection complexity and the corresponding relation of reception antenna number, determine and meet current detection performance and detect multiple
Described terminal corresponding first reception antenna number when miscellaneous degree is minimum；Select each described terminal corresponding first
Maximum in antenna number, described maximum is defined as meeting the current detection of each described terminal
Can and detection complexity corresponding reception antenna number when minimum.
Wherein, bus architecture can include bus and the bridge of any number of interconnection, is specifically represented by processor
One or more processors and the various circuit of memorizer that represent of memorizer link together.Bus architecture
Various other circuit of such as ancillary equipment, manostat and management circuit or the like can also be linked at
Together, these are all it is known in the art, therefore, no longer it are described further herein.Bus
Interface provides interface.Processor is responsible for bus architecture and common process, and memorizer can store process
The data that device is used in execution operation.
Based on technique scheme, in the embodiment of the present invention, base station determines and meets current detection performance and make
Obtain the minimum reception antenna number of detection complexity, according to the reception antenna number determining from candidate's reception antenna
Reception antenna is selected, the channel estimation based on the reception antenna selecting and receipt signal carry out detection and obtain in set
The each self-corresponding data signal of multiple terminals of running time-frequency resource multiplexing must be carried out such that it is able to ensure detection property
In the case of energy, reduce the complexity detecting user data signal under multiple antennas reception condition in PDMA.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot
Close the form of the embodiment of software and hardware aspect.And, the present invention can adopt and wherein wrap one or more
Computer-usable storage medium containing computer usable program code (including but not limited to disk memory and
Optical memory etc.) the upper computer program implemented form.
The present invention is to produce with reference to method according to embodiments of the present invention, equipment (system) and computer program
The flow chart of product and/or block diagram are describing.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or the flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embed
The processor of formula datatron or other programmable data processing device is to produce a machine so that passing through to calculate
The instruction of the computing device of machine or other programmable data processing device produces for realizing in flow chart one
The device of the function of specifying in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or other programmable datas can be guided to process and set
So that being stored in this computer-readable memory in the standby computer-readable memory working in a specific way
Instruction produce and include the manufacture of command device, the realization of this command device is in one flow process or multiple of flow chart
The function of specifying in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Obtain and series of operation steps is executed on computer or other programmable devices to produce computer implemented place
Reason, thus the instruction of execution is provided for realizing in flow chart one on computer or other programmable devices
The step of the function of specifying in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these modification and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these changes and modification.
Claims (18)
1. multiple terminals signal detecting method during a kind of non-orthogonal multiple accesses is it is characterised in that include：
Base station determines and meets current detection performance and make the minimum reception antenna number of detection complexity；
Described base station selects reception antenna according to the reception antenna number determining from candidate's reception antenna set；
Described base station carries out channel estimation to the every reception antenna selecting respectively, obtains every reception of selection
The respective channel estimate matrix of antenna, according to select the respective channel estimate matrix of every reception antenna and
The respective receipt signal of every reception antenna selecting, determination carries out multiple terminals of running time-frequency resource multiplexing each
Corresponding data signal, wherein, the row of described channel estimate matrix represents the running time-frequency resource of multiplexing, described letter
The row of channel estimation matrix represent multiplexing on the corresponding multiple running time-frequency resources of a line of described channel estimate matrix
Multiple terminals.
2. the method for claim 1 meets current inspection it is characterised in that described base station determines
Survey performance and make the minimum reception antenna number of detection complexity, including：
Described base station is according to current input condition correspondence default detection performance and detection complexity and reception
The corresponding relation of antenna number, determines and meets current detection performance and detection complexity is corresponding when minimum connects
Receive antenna number；
Or,
Described base station, according to the configuration parameter of Operation ＆ Maintenance System, determines and meets current detection performance and make
The minimum reception antenna number of detection complexity.
3. the method for claim 1 is it is characterised in that described base station is according to the reception sky determining
Line number selects reception antenna from candidate's reception antenna set, including：
Described base station receives each institute respectively according to each reception antenna in described candidate's reception antenna set
State the performance of the signal of terminal, select the reception antenna of described determination from described candidate's reception antenna set
Several reception antennas.
4. method as claimed in claim 3 is it is characterised in that described base station receives according to described candidate
Each reception antenna in antenna set receives the performance of the signal of each described terminal respectively, from described candidate
The several reception antennas of reception antenna of described determination are selected in reception antenna set, including：
Described base station selects each described terminal each self-corresponding from described candidate's reception antenna set respectively
First setting number reception antenna, obtains the first reception antenna set, wherein, the first setting number of selection
Mesh reception antenna receives the performance of the signal of described terminal, better than its in described candidate's reception antenna set
Its reception antenna receives the performance of the signal of described terminal；
Described base station determines the selected number of times of each reception antenna in described first reception antenna set, according to
Described selected number of times selects the reception antenna of described determination several from described first reception antenna set
Reception antenna, described first sets the reception antenna number that number is not less than described determination.
5. the method as described in any one of claim 1-4 is it is characterised in that described base station is according to selection
The respective channel estimate matrix of every reception antenna and selection every reception antenna respective receive letter
Number, determine each self-corresponding data signal of multiple terminals carrying out running time-frequency resource multiplexing, including：
According to the respective channel estimate matrix of every reception antenna selecting, described base station determines that combined channel is estimated
Meter matrix；
Described base station according to select the respective receipt signal of every reception antenna determine combined received signal to
Amount；
Described joint channel estimation matrix and described combined received signal vector are calculated by described base station as detection
The |input paramete of method algorithm, obtains, using the detection of described detection algorithm, the multiple terminals carrying out running time-frequency resource multiplexing
Each self-corresponding data signal.
6. method as claimed in claim 5 it is characterised in that described detection algorithm is defined maximum likelihood
ML algorithm or maximum likelihood ML algorithm.
7. method as claimed in claim 5 is it is characterised in that described base station connects according to every selected
Receive the respective channel estimate matrix of antenna and determine joint channel estimation matrix, including：
The respective channel estimate matrix of every reception antenna selecting and pattern are split non-by described base station respectively
Orthogonal multiple access accesses the element dot product of PDMA pattern matrix correspondence position, obtains described joint channel estimation
Matrix.
8. method as claimed in claim 2 it is characterised in that described input condition include following arbitrarily
One or more of combination：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, pattern segmentation non-orthogonal multiple connect
Enter Overflow RateHT and the adjacent cell interference level of PDMA pattern matrix.
If 9. method as claimed in claim 8 is it is characterised in that each described terminal is corresponding current
Input condition differs, and described base station is according to current input condition correspondence default detection performance and detection of complex
Degree and the corresponding relation of reception antenna number, determination meets current detection performance and detection complexity is minimum
When corresponding reception antenna number, including：
Described base station is directed to each described terminal, corresponding default according to the corresponding current input condition of described terminal
Detection performance and detection complexity and reception antenna number corresponding relation, determine meet current detection
Performance and described terminal corresponding first reception antenna number when detection complexity is minimum；
Maximum in the corresponding first antenna number of described each described terminal base station selected, by described maximum
Value is defined as meeting the current detection performance of each described terminal and detection complexity is corresponding when minimum connects
Receive antenna number.
10. a kind of base station is it is characterised in that include：
Antenna number determining module, meets current detection performance and makes detection complexity minimum for determining
Reception antenna number；
Selecting module, for selecting from candidate's reception antenna set according to the reception antenna number determining to receive
Antenna；
Signal determining module, for carrying out channel estimation to the every reception antenna selecting respectively, obtains and selects
The respective channel estimate matrix of every reception antenna, according to select the respective channel of every reception antenna estimate
Meter matrix and the respective receipt signal of every reception antenna of selection, determine and carry out the many of running time-frequency resource multiplexing
The each self-corresponding data signal of individual terminal, wherein, the row of described channel estimate matrix represents the time-frequency money of multiplexing
Source, the row of described channel estimate matrix represent the corresponding multiple time-frequency moneys of a line in described channel estimate matrix
Multiple terminals of multiplexing on source.
11. base stations as claimed in claim 10 are it is characterised in that described antenna number determining module is used
In：
According to current input condition correspondence default detection performance and detection complexity and reception antenna number
Corresponding relation, determine and meet current detection performance and detection complexity corresponding reception antenna when minimum
Number；
Or,
According to the configuration parameter of Operation ＆ Maintenance System, determine and meet current detection performance and make detection of complex
Spend minimum reception antenna number.
12. base stations as claimed in claim 10 are it is characterised in that described selecting module is used for：
Each described terminal is received respectively according to each reception antenna in described candidate's reception antenna set
The performance of signal, selects the several receptions of reception antenna of described determination from described candidate's reception antenna set
Antenna.
13. base stations as claimed in claim 12 are it is characterised in that described selecting module is used for：
Each described terminal each self-corresponding first is selected to set from described candidate's reception antenna set respectively
Number reception antenna, obtains the first reception antenna set, and wherein, the first setting number of selection receives
Antenna receives the performance of the signal of described terminal, better than the other reception skies in described candidate's reception antenna set
Line receives the performance of the signal of described terminal；
Determine the selected number of times of each reception antenna in described first reception antenna set, according to described selected
Select the several reception antennas of reception antenna that number of times selects described determination from described first reception antenna set,
Described first sets the reception antenna number that number is not less than described determination.
14. base stations as described in any one of claim 10-13 are it is characterised in that described signal determines mould
Block is used for：
The respective channel estimate matrix of every reception antenna according to selecting determines joint channel estimation matrix；
The respective receipt signal of every reception antenna according to selecting determines combined received signal vector；
Using described joint channel estimation matrix and described combined received signal vector as detection algorithm algorithm
|input paramete, is each corresponded to using multiple terminals that the detection acquisition of described detection algorithm carries out running time-frequency resource multiplexing
Data signal.
15. base stations as claimed in claim 14 are it is characterised in that described detection algorithm is defined maximum seemingly
So ML algorithm or maximum likelihood ML algorithm.
16. base stations as claimed in claim 14 are it is characterised in that described signal determining module is used for：
Respectively the respective channel estimate matrix of every reception antenna selecting and pattern are split non-orthogonal multiple
Access the element dot product of PDMA pattern matrix correspondence position, obtain described joint channel estimation matrix.
17. base stations as claimed in claim 11 are it is characterised in that described input condition includes following
The combination that one or more of meaning：
Detection algorithm, the modulation coding mode of terminal, wireless channel conditions, pattern segmentation non-orthogonal multiple connect
Enter Overflow RateHT and the adjacent cell interference level of PDMA pattern matrix.
18. base stations as claimed in claim 17 are it is characterised in that described antenna number determining module is used
In：
If the corresponding current input condition of each described terminal differs,
For terminal each described, default detection is corresponded to according to the corresponding current input condition of described terminal
Can determine and meet current detection performance and inspection with the corresponding relation of detection complexity and reception antenna number
Survey complexity minimum when the corresponding first reception antenna number of described terminal；
Select the maximum in the corresponding first antenna number of each described terminal, described maximum is defined as
Meet the current detection performance of each described terminal and detection complexity corresponding reception antenna when minimum
Number.
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