CN106411796B - Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple - Google Patents
Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple Download PDFInfo
- Publication number
- CN106411796B CN106411796B CN201510462995.8A CN201510462995A CN106411796B CN 106411796 B CN106411796 B CN 106411796B CN 201510462995 A CN201510462995 A CN 201510462995A CN 106411796 B CN106411796 B CN 106411796B
- Authority
- CN
- China
- Prior art keywords
- receiving antenna
- base station
- selection
- terminal
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses multiple terminals signal detecting method and base stations in a kind of access of non-orthogonal multiple, to reduce the complexity for detecting multiple terminals data-signal in non-orthogonal multiple access under multiple antennas reception condition.This method are as follows: base station determines the receiving antenna number for meeting current detection performance and making detection complexity minimum；Receiving antenna is selected from candidate receiving antenna set according to determining receiving antenna number；Channel estimation is carried out to every receiving antenna of selection respectively, obtain the respective channel estimate matrix of every receiving antenna of selection, according to the respective reception signal of every receiving antenna of the respective channel estimate matrix of every of selection receiving antenna and selection, determine the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing, wherein, the row of the channel estimate matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix indicate the multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line of the channel estimate matrix.
Description
Technical field
The present invention relates to signal inspections in multiple terminals in non-orthogonal multiple technical field more particularly to a kind of access of non-orthogonal multiple
Survey method and base station.
Background technique
With the fast development of wireless communication, number of users and portfolio are in explosive growth, this system to wireless network
Capacity is constantly put forward higher requirements.Industry research prediction, annual mobile data services flow are increased with double speed, are arrived
The year two thousand twenty whole world will have about 50,000,000,000 terminals to access mobile radio network.Volatile user increases so that multiple access technique
Central issue as network upgrade.Multiple access technique determines the basic capacity of network, and to system complexity and portion
Administration's cost has and greatly influences.
Traditional mobile communication (1G-4G) uses orthogonal multiple access technique, and such as frequency division multiple access, time division multiple acess, code divides more
Location, orthogonal frequency division multiplexing multiple access.From the perspective of multi-user information theory, traditional orthogonal manner can only achieve multi-user's appearance
The interior boundary for measuring boundary, causes wireless resource utility efficiency relatively low.
Pattern divides non-orthogonal multiple access (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, by transmitting terminal and receiving end
The technology of Combined Treatment.In transmitting terminal, user is distinguished based on the non-orthogonal feature pattern of multiple signal domains；In receiving end, base
In the feature structure of user's pattern, the side (SIC, Serial Interference Cancellation) is deleted using serial interference
Formula realizes Multiuser Detection, thus accomplish multi-user in the further multiplexing of existing time-frequency wireless resource, it is existing to solve
Have in technology that there are orthogonal manners can only achieve the interior boundary of multi-user's capacity circle, causes wireless resource utility efficiency is relatively low to ask
Topic.
In PDMA, transmitting terminal carries out transmission processing to the signal of one or more terminals；To send treated one or
The signal of multiple terminals carries out the mapping of non-orthogonal feature pattern, so that the signal of different terminals is superimposed in corresponding radio resource,
And according to the mapping of non-orthogonal feature pattern as a result, the signal for one or more terminals that send that treated.Since one can be made
The signal of a or multiple terminals carries out non-orthogonal superposition in radio resource, non-orthogonal multiple access transmission is realized, to mention
High wireless resource utility efficiency.
In PDMA, receiving end carries out the detection of non-orthogonal feature pattern to the signal corresponding to multiple terminals received, determines
The corresponding non-orthogonal feature pattern of received signal；Using the non-orthogonal feature pattern detected, to the received signal received
The multiple terminals detection of SIC mode is carried out, and carries out receiving area's reason, determines the data of different terminals.
Wherein receiving end generallys use belief propagation (Belief Propagation, BP) algorithm and is detected.
By taking the uplink of two receiving antennas of a transmission antenna as an example, as shown in Figure 1, signal model definition is such as following
Formula 1,2 and 3:
xT=[x1 x2 x3] (1)
Wherein, x1Indicate the transmission signal of user 1, x2Indicate the transmission signal of user 2, x3Indicate the transmission letter of user 3
Number,Indicate the reception signal on two running time-frequency resource units (RE) of antenna 1,It indicates in antenna 2
Reception signal on two running time-frequency resource units (RE).
The u node of the variable node of BP algorithm as shown in figure 1, the c node of observer nodes as shown in figure 1.The number of variable node
It is equal to the number for the user being multiplexed on identical running time-frequency resource.
BP algorithm be one kind approach maximum likelihood (Maximum Likelihood, ML) the high complexity of high-performance it is non-thread
Property multiuser detection algorithm, usually its detection complexity with variable node (being multiplexed the user of identical running time-frequency resource)
Number is exponentially increased.
As it can be seen that PDMA system when the user's number for being multiplexed identical running time-frequency resource is more, receives under multiple antennas reception condition
End is higher using the complexity that BP algorithm is detected.
Summary of the invention
The embodiment of the present invention provides multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple, to reduce
Non-orthogonal multiple accesses under multiple antennas reception condition the complexity for detecting multiple terminals data-signal.
Specific technical solution provided in an embodiment of the present invention is as follows:
In a first aspect, providing a kind of non-orthogonal multiple access multiple terminals signal detecting method, comprising:
Base station determines the receiving antenna number for meeting current detection performance and making detection complexity minimum；
The base station selects receiving antenna from candidate receiving antenna set according to determining receiving antenna number；
The base station carries out channel estimation to every receiving antenna of selection respectively, and every receiving antenna for obtaining selection is each
From channel estimate matrix, day is received according to the respective channel estimate matrix of every of selection receiving antenna and every piece-root grafting of selection
The respective reception signal of line determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing, wherein the letter
The row of channel estimation matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix are indicated in the channel estimate matrix
The multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line.
In implementation, the base station determines the receiving antenna for meeting current detection performance and making detection complexity minimum
Number, comprising:
The base station corresponds to preset detection performance and detection complexity and receiving antenna according to current input condition
Several corresponding relationships, determination meet corresponding receiving antenna number when current detection performance and minimum detection complexity；
Alternatively,
The base station determines according to the configuration parameter of Operation & Maintenance System and meets current detection performance and make detection multiple
The minimum receiving antenna number of miscellaneous degree.
In implementation, the base station selects to receive day from candidate receiving antenna set according to determining receiving antenna number
Line, comprising:
The base station receives each terminal according to each receiving antenna in the candidate receiving antenna set respectively
Signal performance, the several receiving antennas of receiving antenna of the determination are selected from the candidate receiving antenna set.
In implementation, the base station receives each institute according to each receiving antenna in the candidate receiving antenna set respectively
The performance for stating the signal of terminal selects the several reception days of receiving antenna of the determination from the candidate receiving antenna set
Line, comprising:
The base station selects each terminal corresponding first to set respectively from the candidate receiving antenna set
Fixed number mesh receiving antenna obtains the first receiving antenna set, wherein the first setting number receiving antenna of selection receives institute
The performance for stating the signal of terminal, better than the signal that other receiving antennas in the candidate receiving antenna set receive the terminal
Performance；
The base station determine each receiving antenna in the first receiving antenna set by selection number, according to the quilt
Selection number selects receiving antenna several receiving antennas of the determination from the first receiving antenna set, and described first
Set the receiving antenna number that number is not less than the determination.
In implementation, the base station is according to every of the respective channel estimate matrix of every receiving antenna of selection and selection
The respective reception signal of receiving antenna determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing, comprising:
The base station determines joint channel estimation matrix according to the respective channel estimate matrix of every receiving antenna of selection；
The base station determines combined received signal vector according to the respective reception signal of every receiving antenna of selection；
The base station is using the joint channel estimation matrix and the combined received signal vector as detection algorithm algorithm
Input parameter, detected using the detection algorithm and obtain the corresponding data of multiple terminals for carrying out running time-frequency resource multiplexing and believe
Number.
In implementation, maximum likelihood ML algorithm or maximum likelihood ML algorithm subject to the detection algorithm.
In implementation, the base station determines that combined channel is estimated according to the respective channel estimate matrix of every receiving antenna of selection
Count matrix, comprising:
The base station is corresponding with PDMA pattern matrix by the respective channel estimate matrix of every receiving antenna of selection respectively
The element dot product of position obtains the joint channel estimation matrix.
In implementation, the input condition includes any of the following or a variety of combinations:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and neighbour are small
Area's interference level.
In implementation, if the corresponding current input condition of each terminal is not identical, the base station is according to current input item
Part corresponds to the corresponding relationship of preset detection performance and detection complexity and receiving antenna number, and determination meets current detection
Corresponding receiving antenna number when performance and minimum detection complexity, comprising:
The base station is directed to each terminal, corresponds to preset detection according to the corresponding current input condition of the terminal
The corresponding relationship of performance and detection complexity and receiving antenna number, determination meet current detection performance and detection complexity
The terminal corresponding first receiving antenna number when minimum；
Maximum value in the corresponding first antenna number of the base station selected each terminal, the maximum value is determined
Corresponding receiving antenna number when current detection performance and minimum detection complexity to meet each terminal.
Second aspect provides a kind of base station, comprising:
Antenna number determining module, for determining the reception for meeting current detection performance and making detection complexity minimum
Antenna number；
Selecting module, for selecting receiving antenna from candidate receiving antenna set according to determining receiving antenna number；
Signal determining module obtains every of selection for carrying out channel estimation to every receiving antenna of selection respectively
The respective channel estimate matrix of receiving antenna, according to the respective channel estimate matrix of every of selection receiving antenna and selection
The respective reception signal of every receiving antenna determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing,
Wherein, the row of the channel estimate matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix are indicated in the letter
The multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line of channel estimation matrix.
In implementation, the antenna number determining module is used for:
The correspondence of preset detection performance and detection complexity and receiving antenna number is corresponded to according to current input condition
Relationship, determination meet corresponding receiving antenna number when current detection performance and minimum detection complexity；
Alternatively,
According to the configuration parameter of Operation & Maintenance System, determination meets current detection performance and makes detection complexity minimum
Receiving antenna number.
In implementation, the selecting module is used for:
The signal of each terminal is received respectively according to each receiving antenna in the candidate receiving antenna set
Performance selects the several receiving antennas of receiving antenna of the determination from the candidate receiving antenna set.
In one specific implementation, the selecting module is used for:
Select the corresponding first setting number of each terminal respectively from the candidate receiving antenna set
Receiving antenna obtains the first receiving antenna set, wherein the first setting number receiving antenna of selection receives the terminal
The performance of signal, better than the performance for the signal that other receiving antennas in the candidate receiving antenna set receive the terminal；
Determine each receiving antenna in the first receiving antenna set by selection number, according to described by selection number
The several receiving antennas of receiving antenna of the determination, the first setting number are selected from the first receiving antenna set
Not less than the receiving antenna number of the determination.
In implementation, the signal determining module is used for:
Joint channel estimation matrix is determined according to the respective channel estimate matrix of every of selection receiving antenna；
Combined received signal vector is determined according to the respective reception signal of every of selection receiving antenna；
Join using the joint channel estimation matrix and the combined received signal vector as the input of detection algorithm algorithm
Number is detected using the detection algorithm and obtains the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing.
Wherein, maximum likelihood ML algorithm or maximum likelihood ML algorithm subject to the detection algorithm.
Specifically, the signal determining module is used for:
Respectively by the member of the respective channel estimate matrix of every receiving antenna of selection and PDMA pattern matrix corresponding position
Vegetarian refreshments multiplies, and obtains the joint channel estimation matrix.
Wherein, the input condition includes any of the following or a variety of combinations:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and neighbour are small
Area's interference level.
In implementation, antenna number determining module is used for:
If the corresponding current input condition of each terminal is not identical,
For each terminal, preset detection performance and inspection are corresponded to according to the corresponding current input condition of the terminal
The corresponding relationship of complexity and receiving antenna number is surveyed, determination meets current detection performance and minimum detection complexity when institute
State the corresponding first receiving antenna number of terminal；
The maximum value in the corresponding first antenna number of each terminal is selected, the maximum value is determined as meeting every
Corresponding receiving antenna number when the current detection performance and minimum detection complexity of a terminal.
Based on the above-mentioned technical proposal, in the embodiment of the present invention, base station determination meets current detection performance and detection of complex
Corresponding receiving antenna number when spending minimum selects to receive from candidate receiving antenna set according to determining receiving antenna number
Antenna, the channel estimation and reception signal of the receiving antenna based on selection carry out detection and obtain the multiple of progress running time-frequency resource multiplexing
The corresponding data-signal of terminal accesses more days so as in the case where guaranteeing detection performance, reduce non-orthogonal multiple
The complexity of user data signal is detected under line reception condition.
Detailed description of the invention
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 base station carries out Multiuser Detection in the embodiment of the present invention；
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
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
In following embodiment, the process of Multiuser Detection in non-orthogonal multiple access is illustrated by taking PDMA as an example, is needed
It is noted that Multiuser Detection process provided by following embodiment also can be applied to other non-orthogonal multiples access skill
Art is not limited in PDMA.
In the embodiment of the present invention, as shown in Fig. 2, base station carries out the method detailed of multiple terminals detection in non-orthogonal multiple access
Process is as follows:
Step 201: base station determines the receiving antenna number for meeting current detection performance and making detection complexity minimum.
Wherein, detection performance includes transmission Block Error Rate (BLER) and handling capacity etc..
Detection complexity is specially multiplying amount, the amount of addition operations and comparison operation amount.
In implementation, current detection performance be it is pre-set, specifically can be and be configured according to present type of service.
In implementation, the determining receiving antenna number for meeting current detection performance and making detection complexity minimum in base station
Embodiment includes but is not limited to following two:
First, base station corresponds to preset detection performance and detection complexity and receiving antenna according to current input condition
Several corresponding relationships, determination meet corresponding receiving antenna number when current detection performance and minimum detection complexity.
Wherein, the input condition includes but is not limited to any one or more following combination: detection algorithm, terminal
Modulation coding scheme, wireless channel conditions, PDMA pattern matrix Overflow RateHT and adjacent cell interference level.Wherein, PDMA schemes
The value of each element is 0 or 1 in sample matrix, if value is 1, has data mapping, value 0, then it represents that no data are reflected
It penetrates, every a line of PDMA pattern matrix indicates that different resource units (RE), each column indicate a data Layer, and each terminal is used
Family can occupy one or more data Layers, and each data Layer can only be occupied by a terminal user.
In specific implementation, in multiple terminals in the case where multiplexing time-frequency resource, each terminal of corresponding multiplexing time-frequency resource
Input condition may be 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 the input condition preset
The corresponding relationship of detection performance and detection complexity and receiving antenna number determines and meets current detection performance and detection again
Corresponding receiving antenna number when miscellaneous degree is minimum.
If the input condition of each terminal of corresponding multiplexing time-frequency resource is not identical, for each terminal, according to the terminal
Corresponding current input condition corresponds to the corresponding relationship of preset detection performance and detection complexity and receiving antenna number, really
Surely meet corresponding receiving antenna number when current detection performance and minimum detection complexity to select as first antenna number
The maximum value is determined as meeting the current of each terminal by the maximum value in the corresponding first antenna number of each terminal
Corresponding receiving antenna number when detection performance and minimum detection complexity, i.e. multiple terminals as final detection time-frequency multiplexing
Data-signal antenna number so that detection complexity is minimum in the case where guaranteeing detection performance.
Second, the base station determines according to the configuration parameter of Operation & Maintenance System and meets current detection performance and make
The minimum receiving antenna number of detection complexity.
Specifically, Operation & Maintenance System is determined according to corresponding relationship between the detection performance and detection complexity of base station
The receiving antenna number for meeting the detection performance of base station and making detection complexity minimum configures determining receiving antenna number
To base station.
Step 202: base station selects receiving antenna from candidate receiving antenna set according to determining receiving antenna number.
In implementation, base station receives each end according to each receiving antenna in the candidate receiving antenna set respectively
The performance of the signal at end selects the several receiving antennas of receiving antenna of the determination from the candidate receiving antenna set.
Wherein, the mode of the several receiving antennas of receiving antenna of the determination is selected from candidate receiving antenna set to be had
It is a variety of, such as the several receiving antennas of receiving antenna of the determination can be randomly choosed from candidate receiving antenna set,
The several receiving antennas of receiving antenna of the determination can be randomly choosed from candidate receiving antenna set according to preset rules.
In one specific embodiment, base station selects each terminal respectively from the candidate receiving antenna set respectively
Corresponding first setting number receiving antenna, obtains the first receiving antenna set, and the first setting number of selection receives day
Line receives the performance of the signal of the terminal, receives the end better than other receiving antennas in the candidate receiving antenna set
The performance of the signal at end；Base station determine each receiving antenna in the first receiving antenna set by selection number, according to institute
The several receiving antennas of receiving antenna for being selected the determination from the first receiving antenna set by selection number are stated, it is described
First setting number is not less than the receiving antenna number of the determination.
Wherein, receiving antenna receives the performance of the signal of terminal, and can be the receiving antenna, this receives the signal of terminal
Performance, be also possible to set duration in receiving antenna receive terminal signal performance.
Wherein, receiving antenna receives the performance of the signal of terminal, specifically can be true by receiving power or uplink signal-to-noise ratio
It is fixed, or determined by the combination of reception power and uplink signal-to-noise ratio.Reception power is higher, then receiving antenna receives the letter of terminal
Number performance it is better, uplink signal-to-noise ratio is higher, then receiving antenna receive terminal signal performance it is better.
Step 203: base station carries out channel estimation to every receiving antenna of selection respectively, and the every piece-root grafting for obtaining selection receives day
The respective channel estimate matrix of line, according to the respective channel estimate matrix of every of selection receiving antenna and every piece-root grafting of selection
The respective reception signal of antenna is received, determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing.
Wherein, the row of the channel estimate matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix indicate
The multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line of the channel estimate matrix.
In implementation, base station determines joint channel estimation square according to the respective channel estimate matrix of every receiving antenna of selection
Battle array；Base station determines combined received signal vector according to the respective reception signal of every receiving antenna of selection；Base station will be described
The input parameter of channel estimate matrix and the combined received signal vector as detection algorithm is closed, is examined using the detection algorithm
Survey the corresponding data-signal of multiple terminals for obtaining and carrying out running time-frequency resource multiplexing.
Optionally, ML algorithm or ML algorithm subject to the detection algorithm, wherein quasi- ML algorithm refers to the ML of drop complexity
Algorithm.
Specifically, base station is respectively by the respective channel estimate matrix of every receiving antenna of selection and PDMA pattern matrix pair
The element dot product for answering position obtains the joint channel estimation matrix.
The process for being provided for the embodiments of the invention Multiuser Detection below by way of a specific embodiment is illustrated.
In the specific embodiment, it is assumed that terminal is sent using single antenna, and one code word of uplink is mapped to one layer, base station it is big
Scale antenna one shares 128 receiving antennas, and the modulation coding scheme of destination end user is four phase-shift keying (PSK)s (QPSK) 1/
3, the BLER performance of destination end user is 1%, and for the detection algorithm that base station uses for BP algorithm, wireless channel conditions are macrocell
The non-direct projection diameter UMA NLOS in Typical Urban, uplink use Overflow RateHT for 233% PDMA pattern matrix, i.e. PDMA [3,7], indicate
7 terminal users are multiplexed on 3 identical running time-frequency resource units, which is indicated with formula (4) are as follows:
In the matrix, " 1 " indicates data mapping, and what " 1 " of same row indicated mapping is identical data, and " 0 " indicates
No data mapping.Every a line indicates different resource units (RE), and each column indicate 1 data Layer, and each terminal user can be with
1 or multiple data Layers are occupied, and each data Layer can only be used by 1 terminal user.
Step 1, base station, which is stored in advance, preserves the corresponding detection performance of different input conditions and detection complexity and connects
Receive the table of the corresponding relationship of antenna number.
Specifically, the corresponding detection performance of different input conditions (CASE) and detection complexity are obtained by way of emulation
And the corresponding relationship of receiving antenna number, wherein input condition include detection algorithm, terminal user modulation coding scheme,
Wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and adjacent cell interference level etc..
Specifically, different input conditions are numbered by input condition and are distinguished, as shown in table 1:
Table 1
Wherein, the corresponding relationship of CASE1 corresponding detection performance and detection complexity and receiving antenna number, as shown in table 2:
Table 2
Wherein, the corresponding relationship of CASE2 corresponding detection performance and detection complexity and receiving antenna number, such as table 3
It is shown:
Table 3
Step 2, base station determine that current input condition is CASE2, search the corresponding detection of CASE2 in uplink receiving
Current detection performance, i.e. target can be met with the corresponding relationship of detection complexity and receiving antenna number, i.e. table 3, acquisition
BLER=1%, and when detection complexity is minimum corresponding receiving antenna number, it is assumed that the receiving antenna number N is 2.
N=2 is selected from candidate receiving antenna set, i.e. 128 receiving antennas according to setting rule in step 3, base station
Root receiving antenna.
Specifically, day is received from 128 piece-root graftings for each of 7 terminal users for being multiplexed same running time-frequency resource in base station
It selects N1=4 piece-root grafting to receive the receiving antenna of the best performance of the signal of the terminal user in line, and records selection N1 piece-root grafting and receive day
The number of line；After traversing each terminal, the number that each receiving antenna of selection is selected is determined, according to the number selected
Sequence from high in the end is ranked up the number of the receiving antenna of selection, selects according to determining order by selection number highest
N=2 root receiving antenna, record the number by the highest N=2 root receiving antenna of selection number of selection.
Step 4, base station tectonic syntaxis channel estimate matrixWith combined received signal vector
Specifically, the receiving antenna that base station is selected according to step 3, carries out channel estimation respectively, and tectonic syntaxis channel is estimated
The reception signal tectonic syntaxis received signal vector on receiving antenna counting matrix, and being selected according to step 3
It is expressed as follows with formula (5) and formula (6):
WhereinThe reception signal being illustrated respectively on three running time-frequency resources of the 1st receiving antenna；The reception signal being illustrated respectively on three running time-frequency resources of the 2nd receiving antenna, subscript indicate user index
Number, subscript indicates receiving antenna call number；The dot product of " " representing matrix corresponding position element.
Wherein,Indicate n-thrOriginal channel estimated matrix on root receiving antenna is indicated with formula (7) are as follows:
Wherein,Indicate n-thrOn root receiving antenna, channel of m-th of terminal user on n-th of running time-frequency resource ring
It answers.
Step 5, base station is by joint channel estimation matrixWith combined received signal vectorInput BP detection
Device is detected, and 7 corresponding data-signals of terminal user for carrying out running time-frequency resource multiplexing are obtained.
Based on the same inventive concept, a kind of base station is provided in the embodiment of the present invention, the specific implementation of the base station can be found in
The description of above method embodiment part, overlaps will not be repeated, as shown in figure 3, the base station specifically includes that
Antenna number determining module 301 meets current detection performance for determination and makes detection complexity minimum
Receiving antenna number；
Selecting module 302 receives day for selecting from candidate receiving antenna set according to determining receiving antenna number
Line；
Signal determining module 303 obtains the every of selection for carrying out channel estimation to every receiving antenna of selection respectively
The respective channel estimate matrix of root receiving antenna, according to the respective channel estimate matrix of every of selection receiving antenna and selection
The respective reception signal of every receiving antenna, determine the multiple terminals corresponding data letter for carrying out running time-frequency resource multiplexing
Number, wherein the row of the channel estimate matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix are indicated described
The multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line of channel estimate matrix.
In implementation, the antenna number determining module 301 is used for:
The correspondence of preset detection performance and detection complexity and receiving antenna number is corresponded to according to current input condition
Relationship, determination meet corresponding receiving antenna number when current detection performance and minimum detection complexity；
Alternatively,
According to the configuration parameter of Operation & Maintenance System, determination meets current detection performance and makes detection complexity minimum
Receiving antenna number.
In implementation, the selecting module 302 is used for:
The signal of each terminal is received respectively according to each receiving antenna in the candidate receiving antenna set
Performance selects the several receiving antennas of receiving antenna of the determination from the candidate receiving antenna set.
In one specific implementation, the selecting module 302 is used for:
Select the corresponding first setting number of each terminal respectively from the candidate receiving antenna set
Receiving antenna obtains the first receiving antenna set, wherein the first setting number receiving antenna of selection receives the terminal
The performance of signal, better than the performance for the signal that other receiving antennas in the candidate receiving antenna set receive the terminal；
Determine each receiving antenna in the first receiving antenna set by selection number, according to described by selection number
The several receiving antennas of receiving antenna of the determination, the first setting number are selected from the first receiving antenna set
Not less than the receiving antenna number of the determination.
In implementation, the signal determining module 303 is used for:
Joint channel estimation matrix is determined according to the respective channel estimate matrix of every of selection receiving antenna；
Combined received signal vector is determined according to the respective reception signal of every of selection receiving antenna；
Join using the joint channel estimation matrix and the combined received signal vector as the input of detection algorithm algorithm
Number is detected using the detection algorithm and obtains the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing.
Wherein, maximum likelihood ML algorithm or maximum likelihood ML algorithm subject to the detection algorithm.
Specifically, the signal determining module 303 is used for:
Respectively by the member of the respective channel estimate matrix of every receiving antenna of selection and PDMA pattern matrix corresponding position
Vegetarian refreshments multiplies, and obtains the joint channel estimation matrix.
In implementation, the input condition includes any of the following or a variety of combinations:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and neighbour are small
Area's interference level.
In one specific implementation, antenna number determining module 301 is used for:
If the corresponding current input condition of each terminal is not identical,
For each terminal, preset detection performance and inspection are corresponded to according to the corresponding current input condition of the terminal
The corresponding relationship of complexity and receiving antenna number is surveyed, determination meets current detection performance and minimum detection complexity when institute
State the corresponding first receiving antenna number of terminal；
The maximum value in the corresponding first antenna number of each terminal is selected, the maximum value is determined as meeting every
Corresponding receiving antenna number when the current detection performance and minimum detection complexity of a terminal.
Based on the same inventive concept, a kind of base station is provided in the embodiment of the present invention, the specific implementation of the base station can be found in
The description of above method embodiment part, overlaps will not be repeated, as shown in figure 4, the base station mainly includes 401 He of processor
Memory 402, wherein preset program is preserved in memory 402, processor 401 reads the journey saved in memory 402
Sequence executes following procedure according to the program:
Determine the receiving antenna number for meeting current detection performance and making detection complexity minimum；
Receiving antenna is selected from candidate receiving antenna set according to determining receiving antenna number；
Channel estimation is carried out to every receiving antenna of selection respectively, obtains the respective channel of every receiving antenna of selection
Estimated matrix, the every receiving antenna according to the respective channel estimate matrix of every of selection receiving antenna and selection are respective
Signal is received, determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing, wherein the channel estimation square
The row of battle array indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix indicate corresponding in a line of the channel estimate matrix
Multiple running time-frequency resources on multiple terminals for being multiplexed.
In implementation, processor 401 corresponds to preset detection performance and detection complexity according to current input condition and connects
The corresponding relationship of antenna number is received, determines and meets corresponding receiving antenna when current detection performance and minimum detection complexity
Number；Alternatively, determination meets current detection performance and makes detection complexity minimum according to the configuration parameter of Operation & Maintenance System
Receiving antenna number.
In implementation, processor 401 receives each respectively according to each receiving antenna in the candidate receiving antenna set
The performance of the signal of the terminal selects the several receptions of receiving antenna of the determination from the candidate receiving antenna set
Antenna.
In one specific implementation, processor 401 selects each terminal from the candidate receiving antenna set respectively
Corresponding first setting number receiving antenna, obtains the first receiving antenna set, wherein the first setting number of selection
A receiving antenna receives the performance of the signal of the terminal, connects better than other receiving antennas in the candidate receiving antenna set
Receive the performance of the signal of the terminal；Determine each receiving antenna in the first receiving antenna set by selection number, press
According to the receiving antenna for being selected the determination from the first receiving antenna set by selection number several receiving antennas,
The first setting number is not less than the receiving antenna number of the determination.
In implementation, processor 401 determines combined channel according to the respective channel estimate matrix of every receiving antenna of selection
Estimated matrix；Combined received signal vector is determined according to the respective reception signal of every of selection receiving antenna；By the joint
The input parameter of channel estimate matrix and the combined received signal vector as detection algorithm algorithm, using the detection algorithm
Detection obtains the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing.
Wherein, maximum likelihood ML algorithm or maximum likelihood ML algorithm subject to the detection algorithm.
Specifically, processor 401 is respectively by the respective channel estimate matrix of every receiving antenna of selection and PDMA pattern
The element dot product of matrix corresponding position obtains the joint channel estimation matrix.
Wherein, the input condition includes any of the following or a variety of combinations:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, the Overflow RateHT of PDMA pattern matrix and neighbour are small
Area's interference level.
In one specific implementation, if the corresponding current input condition of each terminal is not identical, processor 401 is for every
A terminal corresponds to preset detection performance and detection complexity according to the corresponding current input condition of the terminal and connects
The corresponding relationship of antenna number is received, determines and meets terminal when current detection performance and minimum detection complexity corresponding the
One receiving antenna number；The maximum value in the corresponding first antenna number of each terminal is selected, the maximum value is determined
Corresponding receiving antenna number when current detection performance and minimum detection complexity to meet each terminal.
Wherein, bus architecture may include the bus and bridge of any number of interconnection, one specifically represented by processor
Or the various circuits of memory that multiple processors and memory represent link together.Bus architecture can also will be such as peripheral
Various other circuits of equipment, voltage-stablizer and management circuit or the like link together, these are all well known in the art
, therefore, it will not be further described herein.Bus interface provides interface.Processor be responsible for manage bus architecture and
Common processing, memory can store processor used data when executing operation.
Based on the above-mentioned technical proposal, in the embodiment of the present invention, base station determination meets current detection performance and to detect
The minimum receiving antenna number of complexity selects to receive day from candidate receiving antenna set according to determining receiving antenna number
Line, the channel estimation and reception signal of the receiving antenna based on selection carry out detection and obtain the multiple ends for carrying out running time-frequency resource multiplexing
Corresponding data-signal is held, so as to reduce multiple antennas reception condition in PDMA in the case where guaranteeing detection performance
The complexity of lower detection user data signal.
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 (16)
1. multiple terminals signal detecting method in a kind of non-orthogonal multiple access characterized by comprising
Base station determines the receiving antenna number for meeting current detection performance and making detection complexity minimum；
The base station selects receiving antenna from candidate receiving antenna set according to determining receiving antenna number；
The base station carries out channel estimation to every receiving antenna of selection respectively, and every receiving antenna for obtaining selection is respective
Channel estimate matrix, the every receiving antenna according to the respective channel estimate matrix of every of selection receiving antenna and selection are each
From reception signal, determine carry out running time-frequency resource multiplexing the corresponding data-signal of multiple terminals, wherein the channel is estimated
The row for counting matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix indicate a line in the channel estimate matrix
The multiple terminals being multiplexed on corresponding multiple running time-frequency resources；
Wherein, the base station determines the receiving antenna number for meeting current detection performance and making detection complexity minimum, packet
It includes:
The base station corresponds to preset detection performance and detection complexity and receiving antenna number according to current input condition
Corresponding relationship, determination meet corresponding receiving antenna number when current detection performance and minimum detection complexity；
Alternatively,
The base station determines according to the configuration parameter of Operation & Maintenance System and meets current detection performance and make detection complexity
Minimum receiving antenna number.
2. the method as described in claim 1, which is characterized in that the base station connects according to determining receiving antenna number from candidate
It receives in antenna set and selects receiving antenna, comprising:
The base station receives the letter of each terminal according to each receiving antenna in the candidate receiving antenna set respectively
Number performance, the several receiving antennas of receiving antenna of the determination are selected from the candidate receiving antenna set.
3. method according to claim 2, which is characterized in that the base station is according to every in the candidate receiving antenna set
A receiving antenna receives the performance of the signal of each terminal respectively, selects from the candidate receiving antenna set described true
The fixed several receiving antennas of receiving antenna, comprising:
The base station selects the corresponding first setting number of each terminal respectively from the candidate receiving antenna set
Mesh receiving antenna obtains the first receiving antenna set, wherein the first setting number receiving antenna of selection receives the end
The performance of the signal at end, better than the property for the signal that other receiving antennas in the candidate receiving antenna set receive the terminal
Energy；
The base station determine each receiving antenna in the first receiving antenna set by selection number, selected according to described
Number selects the several receiving antennas of receiving antenna of the determination, first setting from the first receiving antenna set
Number is not less than the receiving antenna number of the determination.
4. the method according to claim 1, which is characterized in that the base station is according to every receiving antenna of selection
Respective channel estimate matrix and the respective reception signal of every receiving antenna of selection determine and carry out running time-frequency resource multiplexing
Multiple corresponding data-signals of terminal, comprising:
The base station determines joint channel estimation matrix according to the respective channel estimate matrix of every receiving antenna of selection；
The base station determines combined received signal vector according to the respective reception signal of every receiving antenna of selection；
The base station is using the joint channel estimation matrix and the combined received signal vector as the defeated of detection algorithm algorithm
Enter parameter, is detected using the detection algorithm and obtain the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing.
5. method as claimed in claim 4, which is characterized in that maximum likelihood ML algorithm or maximum subject to the detection algorithm
Likelihood ML algorithm.
6. method as claimed in claim 4, which is characterized in that the base station is according to the respective letter of every receiving antenna of selection
Channel estimation matrix determines joint channel estimation matrix, comprising:
The base station respectively connects the respective channel estimate matrix of every receiving antenna of selection and pattern segmentation non-orthogonal multiple
The element dot product for entering PDMA pattern matrix corresponding position obtains the joint channel estimation matrix.
7. the method as described in claim 1, which is characterized in that the input condition includes any of the following or a variety of groups
It closes:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, pattern segmentation non-orthogonal multiple access PDMA pattern square
The Overflow RateHT and adjacent cell interference level of battle array.
8. the method for claim 7, which is characterized in that if the corresponding current input condition of each terminal not phase
Together, the base station corresponds to pair of preset detection performance and detection complexity and receiving antenna number according to current input condition
It should be related to, determination meets corresponding receiving antenna number when current detection performance and minimum detection complexity, comprising:
The base station is directed to each terminal, corresponds to preset detection performance according to the corresponding current input condition of the terminal
With the corresponding relationship of detection complexity and receiving antenna number, determination meets current detection performance and detection complexity is minimum
The corresponding first receiving antenna number of Shi Suoshu terminal；
Maximum value in the corresponding first antenna number of the base station selected each terminal, the maximum value is determined as full
Corresponding receiving antenna number when the current detection performance and minimum detection complexity of each terminal of foot.
9. a kind of base station characterized by comprising
Antenna number determining module, for determining the receiving antenna for meeting current detection performance and making detection complexity minimum
Number；
Selecting module, for selecting receiving antenna from candidate receiving antenna set according to determining receiving antenna number；
Signal determining module, for carrying out channel estimation to every receiving antenna of selection respectively, the every piece-root grafting for obtaining selection is received
The respective channel estimate matrix of antenna, according to every of the respective channel estimate matrix of every of selection receiving antenna and selection
The respective reception signal of receiving antenna determines the corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing, wherein
The row of the channel estimate matrix indicates that the running time-frequency resource of multiplexing, the column of the channel estimate matrix are indicated in the channel estimation
The multiple terminals being multiplexed on the corresponding multiple running time-frequency resources of a line of matrix；
Wherein, the antenna number determining module is used for:
The corresponding relationship of preset detection performance and detection complexity and receiving antenna number is corresponded to according to current input condition,
Determination meets corresponding receiving antenna number when current detection performance and minimum detection complexity；
Alternatively,
According to the configuration parameter of Operation & Maintenance System, determination meets current detection performance and makes detection complexity is minimum to connect
Receive antenna number.
10. base station as claimed in claim 9, which is characterized in that the selecting module is used for:
Receive the performance of the signal of each terminal respectively according to each receiving antenna in the candidate receiving antenna set,
The several receiving antennas of receiving antenna of the determination are selected from the candidate receiving antenna set.
11. base station as claimed in claim 10, which is characterized in that the selecting module is used for:
The corresponding first setting number of each terminal is selected to receive respectively from the candidate receiving antenna set
Antenna obtains the first receiving antenna set, wherein the first setting number receiving antenna of selection receives the signal of the terminal
Performance, better than the performance for the signal that other receiving antennas in the candidate receiving antenna set receive the terminal；
Determine each receiving antenna in the first receiving antenna set by selection number, according to it is described by selection number from institute
The several receiving antennas of receiving antenna that the determination is selected in the first receiving antenna set are stated, the first setting number is not small
In the receiving antenna number of the determination.
12. such as the described in any item base stations claim 9-11, which is characterized in that the signal determining module is used for:
Joint channel estimation matrix is determined according to the respective channel estimate matrix of every of selection receiving antenna；
Combined received signal vector is determined according to the respective reception signal of every of selection receiving antenna；
Using the joint channel estimation matrix and the combined received signal vector as the input parameter of detection algorithm algorithm, adopt
The corresponding data-signal of multiple terminals for carrying out running time-frequency resource multiplexing is obtained with detection algorithm detection.
13. base station as claimed in claim 12, which is characterized in that maximum likelihood ML algorithm or most subject to the detection algorithm
Maximum-likelihood ML algorithm.
14. base station as claimed in claim 12, which is characterized in that the signal determining module is used for:
Respectively by the respective channel estimate matrix of every receiving antenna of selection and pattern segmentation non-orthogonal multiple access PDMA figure
The element dot product of sample matrix corresponding position obtains the joint channel estimation matrix.
15. base station as claimed in claim 9, which is characterized in that the input condition includes any of the following or a variety of
Combination:
Detection algorithm, the modulation coding scheme of terminal, wireless channel conditions, pattern segmentation non-orthogonal multiple access PDMA pattern square
The Overflow RateHT and adjacent cell interference level of battle array.
16. base station as claimed in claim 15, which is characterized in that the antenna number determining module is used for:
If the corresponding current input condition of each terminal is not identical,
For each terminal, preset detection performance is corresponded to according to the corresponding current input condition of the terminal and detection is multiple
The corresponding relationship of miscellaneous degree and receiving antenna number, determination meet end when current detection performance and minimum detection complexity
Hold corresponding first receiving antenna number；
The maximum value in the corresponding first antenna number of each terminal is selected, the maximum value is determined as to meet each institute
State corresponding receiving antenna number when the current detection performance and minimum detection complexity of terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510462995.8A CN106411796B (en) | 2015-07-31 | 2015-07-31 | Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510462995.8A CN106411796B (en) | 2015-07-31 | 2015-07-31 | Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106411796A CN106411796A (en) | 2017-02-15 |
| CN106411796B true CN106411796B (en) | 2019-07-05 |
Family
ID=58008098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510462995.8A Active CN106411796B (en) | 2015-07-31 | 2015-07-31 | Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106411796B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639607B (en) * | 2019-01-21 | 2021-09-03 | 南京邮电大学 | Low-complexity signal detection method for non-orthogonal multiple access system |
| JP2023520245A (en) | 2020-04-03 | 2023-05-16 | コンチネンタル オートモーティヴ テクロノジーズ ゲー・エム・ベー・ハー | Discrete Digital Signal Estimation Method in Noisy and Overloaded Wireless Communication Systems with CSI Errors |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1564908A1 (en) * | 2003-12-23 | 2005-08-17 | Telefonaktiebolaget LM Ericsson (publ) | Advanced multi-sensor processing |
| CN1996782B (en) * | 2005-12-26 | 2010-05-05 | 中兴通讯股份有限公司 | Antenna selection and indication method of the space domain self-adapted link |
| CN101247208B (en) * | 2008-02-29 | 2013-05-08 | 中兴通讯股份有限公司 | Descending multi-user association space division multiplex signal transmitting and receiving method |
| CN102158263B (en) * | 2010-02-11 | 2015-12-02 | 索尼公司 | Based on the channel information feedback method of code book, equipment and system |
| CN101867462A (en) * | 2010-05-21 | 2010-10-20 | 清华大学 | Multi-base station cooperation linear precoding method based on minimum total bit error rate |
-
2015
- 2015-07-31 CN CN201510462995.8A patent/CN106411796B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106411796A (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105227273B (en) | A kind of method, system and the equipment of data transmission | |
| RU2505946C2 (en) | Method for simultaneous allocation of resources and grouping of base stations | |
| CN108199819A (en) | The determining method and device of the transmission of control signaling, reception and information | |
| CN105721123B (en) | A kind of user pairing and power distribution method and device | |
| CN110366252A (en) | A kind of communication means, terminal and base station | |
| CN106160831B (en) | A kind of signal detecting method and device | |
| CN105338641B (en) | A kind of information sending, receiving method and relevant apparatus | |
| US10374841B2 (en) | Parallel processing of sphere decoders and other vector finding approaches using tree search | |
| CN109600838A (en) | A kind of indicating means, terminal and the base station of uplink subband pre-coding matrix | |
| CN108988921B (en) | A kind of instruction of beam information determines method and device, communication system | |
| EP3079286A1 (en) | Method, device and system for processing data | |
| CN106411796B (en) | Multiple terminals signal detecting method and base station in a kind of access of non-orthogonal multiple | |
| JP2020503772A (en) | Data transmission method, transmitting device and receiving device | |
| CN107302385B (en) | Virtual multiple-input multiple-output communication method, device and system | |
| CN103427934B (en) | Public reference signal CRS information processing methods and device | |
| TWI650984B (en) | Modulation method detection method and device | |
| CN108023630A (en) | A kind of information transferring method and relevant device | |
| CN105471778B (en) | A kind of signal detecting method and device | |
| CN109660473B (en) | Spherical decoding detection method and device and computer readable storage medium | |
| CN103368892B (en) | Transmission diversity detection method and device in a kind of ofdm system | |
| CN104717000B (en) | A kind of data processing method and device | |
| KR20200022307A (en) | Apparatuses, computer-readable media, and methods for single dimension maximal likelihood symbol detection | |
| CN103546237B (en) | A kind of method of network code, apparatus and system | |
| CN104868983B (en) | A kind of data transfer, data receiver detection method and base station, user equipment | |
| CN107027132B (en) | A kind of signal detecting method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210528 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |