CN101437008B - Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof - Google Patents
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Abstract
The invention discloses a receiver for a multi-carrier system with multiple input/output (MIMO), a receiving antenna selection device and a method thereof, which can effectively select a receiving antenna assembly with better signal detection efficiency, and promote system effectiveness. The selection device contains a channel estimation unit and an antenna selection unit. The channel estimation unit is used for producing corresponding channel matrixes of various MIMO channels on various subcarriers, and the antenna selection unit produces a transmission capacity parameter of various possible receiving antenna assemblies on the subcarriers according to the corresponding channel matrixes, and selects the receiving antenna assembly which can reach best whole transmission capacity according to the transmission capacity parameter.
Description
Technical field
The invention relates to communication system, espespecially a kind of receiver of multicarrier system of multiple input and output and receiving antenna selection device thereof and method.
Background technology
In communication system now, in order to reach higher transmission rate and wider transmission range, normal multiple input and output (the Multiple Input Multiple Output that uses, be called for short MIMO) technology, that is use many transmit antennas and reception antenna, to allow transmitting multiple signal streams independent of each other (signal stream) simultaneously.Although MIMO technology can increase system effectiveness, use many reception antennas can make the wasted work of the receiver of system increase.Therefore, how in all reception antennas, effectively to select preferably antenna of input usefulness, be very important for reducing wasted work.In the time that the same time is only transmitted a signal stream, can select several reception antennas that signal energy is the strongest is to receive signal source, to carry out input.But, in the time that multiple signal stream transmits together, because signal stream can interfere with each other to each other, if select antenna according to the intensity that receives signal, and fail to bring about tangible results.
With regard to multicarrier (multi-carrier) system, for example orthogonal frequency division multiplex (MUX) (orthogolalfrequency division multiplexing, be called for short OFDM) system, because it transmits signal at multiple subcarriers (sub-carrier) simultaneously, thereby it is in the time utilizing MIMO technology transfer multiple signal stream, the interference cases that signal flows to each other can be more complicated, carry out input if directly choose several reception antennas that signal energy is the strongest, effect is more not obvious.
Summary of the invention
In view of this, one of the object of the invention, is to provide a kind of receiving antenna selection device and system of selection thereof of multicarrier system, detects the reception antenna combination of usefulness, elevator system usefulness effectively to choose tool better signal.
One of the object of the invention, be to provide a kind of receiving antenna selection device and system of selection thereof of multicarrier system, it can adopt and adjust when interleaving (tone-interleaved) mode and transmitting targeting signal (preamble signal) in multicarrier system, choose efficiently the reception antenna combination that tool better signal detects usefulness, with elevator system usefulness.
One of the object of the invention, is the receiver of the multicarrier system that a kind of multiple input and output are provided, and it can utilize special Receiving antenna selection mechanism, effectively chooses tool better signal and detect the reception antenna combination of usefulness, with elevator system usefulness.
In one embodiment of the invention, disclose a kind of Receiving antenna selection method of multicarrier system.This multicarrier system has multiple transmitting antennas, multiple reception antenna and multiple subcarrier, and these subcarriers comprise multiple referenced subcarriers.This system of selection comprises the following step: for these transmitting antennas respectively with each multiple channel that form of multiple reception antennas combination, produce the respective channels matrix (channel matrix) of each channel at each referenced subcarrier, wherein each reception antenna combination comprises at least one reception antenna; According to this respective channels matrix, produce the transmission capacity parameter (capacity parameter) that each reception antenna is combined in each referenced subcarrier, wherein this transmission capacity parameter is the transmission capacity that is combined in this referenced subcarrier corresponding to this reception antenna; And be combined in the transmission capacity parameter of each referenced subcarrier according to each reception antenna, from these reception antennas combinations, choose reception antenna combination.
In another embodiment of the present invention, disclose a kind of receiving antenna selection device of multicarrier system.This multicarrier system has multiple transmitting antennas, multiple reception antenna and multiple subcarrier, and these subcarriers comprise multiple referenced subcarriers.This choice device comprises: channel estimation unit, be coupled to these reception antennas, in order to produce each channel of multiple channels at the respective channels matrix of each referenced subcarrier, wherein these channels are formed with each of multiple reception antennas combination respectively by these transmitting antennas, and each reception antenna combines and comprises at least one reception antenna; And antenna selected cell, be coupled to this channel estimation unit and these reception antennas, in order to according to this respective channels matrix, produce the transmission capacity parameter that each reception antenna is combined in each referenced subcarrier, and according to this transmission capacity parameter, choose these reception antennas and combine one of them, choose the each reception antenna in combination to start this.
Brief description of the drawings
The 1st figure is according to one embodiment of the present of invention, illustrates the Organization Chart of multicarrier system.
2A figure shows that two transmitting antennas transmit an example of targeting signal in poor mode between adjusting.
2B figure is presented under the load mode of 2A figure, the targeting signal that each reception antenna receives.
3A figure shows that three transmitting antennas transmit an example of targeting signal in poor mode between adjusting.
3B figure is presented under the load mode of 3A figure, the targeting signal that each reception antenna receives.
The 4th figure is the flow chart of an embodiment of the Receiving antenna selection method of multicarrier system of the present invention.
Description of reference numerals
1: multicarrier system 11: transmitter
111: transmitting antenna 12: receiver
121: receiver module 1211: reception antenna
1212:OFDM unit 122: receiving antenna selection device
1221: channel estimation unit 1222: antenna selected cell
123: counting circuit 124: channel equalizer
125: signal detection circuit
21,22,31,32,33: during targeting sequencing
Embodiment
In the embodiment of the following stated, multicarrier system is taking ofdm system as example.Only persond having ordinary knowledge in the technical field of the present invention, when technical characterictic of the present invention being extended to other multicarrier system, so scope of the present invention is when being not limited to ofdm system.
The 1st figure is according to one embodiment of the present of invention, illustrates the Organization Chart of multicarrier system.In figure, multicarrier system 1 is MIMO-OFDM system, and its transmitter 11 has Nt transmitting antenna 111, and receiver 12 has Nr receiver module 121, and each receiver module 121 represents RX path, and it comprises reception antenna 1211 and OFDM unit 1212.Multicarrier system 1 is before passing receipts data, transmitter 11 can first transmit specific targeting signal, each reception antenna 1211 is being received after this targeting signal, process (comprising demodulation from radio frequency to fundamental frequency, analogy to the conversion of numerical digit, OFDM decoding etc.) via OFDM unit 1212, then deliver to receiving antenna selection device 122.Receiving antenna selection device 122 can be according to each OFDM unit 1212 targeting signals after treatment, the wherein Na that chooses Nr receiver module 121 is individual, for follow-up the transmitted data of receiver/transmitter 11, and the receiver module 121 that other are not selected closes, to reach power saving effect.On the other hand, after selected Na the receiver module 121 of receiving antenna selection device 122, counting circuit 123 can carry out the calculating of channel equalizer 124 coefficients.124 of channel equalizers, after coefficient determines, carry out the gradeization of received data and move, then deliver to signal deteching circuit 125 and detect.
Because receiving antenna selection device 122 is to choose Na from Nr receiver module 121, thereby the total C of the selection mode that can consider
na nrkind, wherein each respectively represents reception antenna combination.For arbitrary reception antenna combination S, between itself and Nt transmitting antenna 111, can form mimo channel and (therefore can form altogether C
na nrindividual mimo channel).If multicarrier system 1 has n subcarrier, this mimo channel at the corresponding channel matrix of k subcarrier (k=0-n-1) is
formula (1-1)
In formula (1-1), each matrix element (matrix element) is to represent respectively the channel response at k subcarrier between each reception antenna 1211 of each transmitting antenna 111 and reception antenna combination S.For example, h
s1, Ntrepresent the channel response at k subcarrier between first reception antenna 1211 of reception antenna combination S and Nt transmitting antenna 111.
Based on the channel matrix of formula (1-1), this mimo channel in the best transmission capacity (capacity) of k subcarrier is
C (k)=log det (I+ γ H
s' (k) H
s(k)) formula (1-2)
Wherein, I is unit matrix (identity matrix), and the news that γ is receiving terminal are assorted than (SNR), H
s' (k) be H
s(k) conjugate transpose (Hermitian) matrix.Formula (1-2) is that the technical field of the invention has and conventionally knows that the knowledgeable knows, and seldom explains herein.About further instruction, refer to S.Sanayeiand A.Nosratinia, " Antenna selection in MIMO systems, " IEEECommunications Magazine, pp.68-73, Oct.20004.
Produce effects really for making multicarrier system 1 reach best biography, should choose the reception antenna combination that can reach best transmission capacity.It shown in formula (1-2), is the best transmission capacity that mimo channel (and the combination of corresponding reception antenna) has at single subcarrier, and because multicarrier system 1 is to utilize n subcarrier passing receipts data simultaneously, therefore in the time choosing reception antenna combination, can not only consider wherein any single subcarrier.So receiving antenna selection device 122 is to consider that all reception antennas are combined in the transmission capacity that the multiple referenced subcarrier in n subcarrier has respectively, to choose the reception antenna combination of the best transmission capacity that can reach overall.In an embodiment, receiving antenna selection device 122 is to consider all n subcarrier, that is these referenced subcarriers are this n subcarrier.In another embodiment, receiving antenna selection device 122 is subcarriers (being that these referenced subcarriers are a subclass of this n subcarrier) of considering part, to choose best reception antenna combination.For example,, because contiguous subcarrier has close channel response and transmission capacity, so every m (m > 1) adjacent subcarrier can only be considered one of them, to reduce operand.During as m=2, can only consider the subcarrier of odd number or even number; When m=3, can only consider the 0th, 3,6... subcarrier or l, 4,7... subcarrier or the 2nd, 5,8... subcarrier.The maximum permissible value of m can be adjusted to some extent according to the characteristic of channel.
Thin speech, receiving antenna selection device 122 comprises channel estimation unit 1221 and antenna selected cell 1222.Channel estimation unit 1221 is coupled to respectively Nr OFDM unit 1212, and according to OFDM unit 1212 targeting signal after treatment, produces the respective channels matrix of each mimo channel at each referenced subcarrier, shown in (1-1).Antenna selected cell 1222 is coupled to channel estimation unit 1221 and Nr receiver module 121.The channel matrix that computational logic in antenna selected cell 1222 can produce according to channel estimation unit 1221, produces the transmission capacity parameter of each mimo channel (and the combination of corresponding reception antenna) at each referenced subcarrier.Transmission capacity parameter herein corresponding to this mimo channel in the transmission capacity of this referenced subcarrier (is for example, best transmission capacity shown in formula (1-2)), can be in order to represent the transmission capacity height of this mimo channel at this referenced subcarrier.The corresponding reception antenna of supposing this mimo channel is combined as S, this referenced subcarrier is k subcarrier, can be according to formula (1-2), produce following various forms of transmission capacity parameter: (1) is directly with (the I+ γ H of the determinant det in formula (1-2)
s' (k) H
s(k)) as transmission capacity parameter, but required operand is larger.(2) receiving terminal news assorted larger than γ in, can ignore the impact of noise, thereby the determinant det (H that can simplify
s' (k) H
s(k)) be used as transmission capacity parameter, to save operand.(3) in the time that the number Na of the number Nt of transmitting antenna 111 and the reception antenna l211 of reception antenna combination S is identical, the determinant det (H that can more simplify
s(k)) as transmission capacity parameter, significantly to reduce required operand.It should be noted that its form is also unrestricted as long as transmission capacity parameter can be in order to represent the transmission capacity height of mimo channel at referenced subcarrier.
Further, the selection logic in antenna selected cell 1222 is combined in the transmission capacity parameter of each referenced subcarrier according to each reception antenna, from C
na nrin individual reception antenna combination, choose the first reception antenna combination, and start each reception antenna 1211 of this first reception antenna combination and the receiver module 121 at place thereof.In an embodiment, the selection logic in antenna selected cell 1222 be according to each reception antenna be combined in each referenced subcarrier transmission capacity parameter and choose the first reception antenna combination.For example, the first reception antenna be combined as each referenced subcarrier transmission capacity parameter and for the maximum.In the first preferred embodiment, the selection logic in antenna selected cell 1222 be according to each reception antenna be combined in each referenced subcarrier transmission capacity parameter reciprocal and, choose the first reception antenna combination.For example, the first reception antenna is combined as transmission capacity parameter reciprocal of each referenced subcarrier and is reckling.In the first preferred embodiment, subcarrier pair poor channel response can be amplified in the weight of entire effect.So, larger for channel encoding rate (channel coding rate), namely the poor situation of coding protection ability, has obvious performance improvements.
In the second preferred embodiment, if the Nt of multicarrier system 1 transmitting antenna 111 is to adjust interleaving mode, the targeting signal that comprises multiple targeting sequencings in n subcarrier transmission, channel estimation unit 1221 is in the time that reception antenna 1211 is received first targeting sequencing of each subcarrier, start to produce the respective channels matrix of each mimo channel at each referenced subcarrier, that is start to carry out the selection of reception antenna 1211.And, in this respective channels matrix, corresponding to the matrix element of the each reception antenna 1211 in the reception antenna combination of each mimo channel, it is first targeting sequencing receiving at other subcarriers of this referenced subcarrier or contiguous this referenced subcarrier according to this reception antenna 1211 and producing.In this second preferred embodiment, each targeting sequencing is the OFDM symbol (symbol) for carrying training sequence (training sequence), to represent and adjust the load mode interleaving, at one time, different transmitting antennas 111 all transmits targeting sequencing on different subcarriers.Therefore, receiver 12, in the time receiving targeting signal, can be distinguished the targeting sequencing from different transmit antennas 111 according to the position of subcarrier.In addition, counting circuit 123 can start after each reception antenna 1211 of the first reception antenna combination at antenna selected cell 1222, carries out the calculating of the coefficient of channel equalizer 124.Due in the time receiving first targeting sequencing, start ahead of time to carry out the selection of reception antenna, therefore harvesting before all targeting sequencings, counting circuit 123 just can complete the action of design factor.After targeting sequencing, be exactly and then data conventionally, and by set coefficient before targeting sequencing finishes, channel equalizer 124 just can carry out the action such as gradeization of data in time, then signal deteching circuit 125 also can carry out the detection of data in time, and can not cause extra detection to postpone, so can elevator system usefulness.
Below respectively with two situations with three transmitting antennas 111, further illustrate the second preferred embodiment.2A figure shows that two transmitting antennas 111 (with Txl and Tx2 representative) transmit an example of targeting signal in poor mode between adjusting.Wherein, this targeting signal comprises sequence _ 1 and sequence _ 2, and it represents respectively and only passes the targeting sequencing in even number and odd subcarriers.On the other hand, the targeting signal that each reception antenna 1211 receives is as shown in 2B figure, wherein, during first targeting sequencing 21, each reception antenna 1211 is to receive the targeting sequencing that targeting sequencing that Txl passes in even subcarriers and Tx2 pass in odd subcarriers; And during second targeting sequencing 22,1211 of each reception antennas receive the targeting sequencing that targeting sequencing that Tx1 passes in odd subcarriers and Tx2 pass in even subcarriers.As mentioned before, because contiguous subcarrier has close channel response and transmission capacity, so in the time that selective reception antenna combines, can only consider the subcarrier of odd number or even number.Therefore, in the situation of two transmitting antennas 111, if with the subcarrier (that is taking even subcarriers as referenced subcarrier) of only considering even number as example, when channel estimation unit 1221 will be according to first targeting sequencing of received each subcarrier, produce each mimo channel in the time of the respective channels matrix of even subcarriers, the matrix element of the each reception antenna 1211 combining corresponding to the reception antenna of this mimo channel, it is first targeting sequencing receiving in the odd subcarriers of this even subcarriers or contiguous this even subcarriers according to this reception antenna 1211 and producing.That is the channel matrix of formula (1-1) can be expressed as
formula (1-3)
In formula (1-3), ySm, 1 (2k) is m (m=1-Na) reception antenna 1211 channel responses at 2k subcarrier of reception antenna combination S, and this channel response is the compensation at first targeting sequencing (being sequence _ 1) of 2k subcarrier reception through m reception antenna 1211; YSm, 2 (2k+1) are m reception antenna 1211 channel responses at 2k+1 subcarrier, and this channel response is the compensation at first targeting sequencing (being sequence _ 2) of 2k+1 subcarrier reception through m reception antenna 1211.
3A figure shows that three transmitting antenna 11l (with Txl, Tx2 and Tx3 representative) transmit an example of targeting signal in poor mode between adjusting.Wherein, sequence _ l, sequence _ 2 and sequence _ 3 represent that respectively only biography is individual at 3k, 3k+1 is individual and the targeting sequencing of 3k+2 subcarrier.As shown in 3A figure, during same targeting sequencing 31,32 or 33, Txl, Tx2 and Tx3 transmit respectively different targeting sequencings.On the other hand, for each reception antenna 1211, its signal receiving is as shown in 3B figure.In this example, can utilize equally during first targeting sequencing 31, the targeting sequencing that each subcarrier receives, produce the respective channels matrix of each mimo channel at each referenced subcarrier, wherein referenced subcarrier can be 3k, 3k+1 or 3k+2 subcarrier, is taking 3k subcarrier as example herein.Therefore, the channel matrix of formula (1-1) can be expressed as
In formula (1-4), ySm, 1 (3k) is m (m=1-Na) reception antenna 1211 channel responses at 3k subcarrier of reception antenna combination S, and this channel response is the compensation at first targeting sequencing (being sequence _ 1) of 3k subcarrier reception through m reception antenna 1211; YSm, 2 (3k+1) are m reception antenna 1211 channel responses at 3k+1 subcarrier, and this channel response is the compensation at first targeting sequencing (being sequence _ 2) of 3k+1 subcarrier reception through m reception antenna 1211; YSm, 3 (3k+1) are m reception antenna 1211 channel responses at 3k+2 subcarrier, and this channel response is the compensation at first targeting sequencing (being sequence _ 3) of 3k+2 subcarrier reception through m reception antenna 1211.
The 4th figure is the flow chart of the embodiment of the Receiving antenna selection method of multicarrier system of the present invention.This multicarrier system has multiple transmitting antennas, multiple reception antenna and multiple subcarrier, and these subcarriers comprise multiple referenced subcarriers.As shown in Figure 4, this flow process comprises the following step:
Step 41: for these transmitting antennas respectively with each multiple mimo channel that form of multiple reception antennas combination, produce the corresponding channel matrix of each mimo channel at each referenced subcarrier;
Step 42: according to this respective channels matrix, produce each reception antenna and be combined in a transmission capacity parameter of each referenced subcarrier; And
Step 43: be combined in the transmission capacity parameter of each referenced subcarrier according to each reception antenna, choose the first reception antenna combination from these reception antenna combinations.
In step 41, each reception antenna combination comprises at least two these reception antennas.In step 42, this transmission capacity parameter is to represent that this reception antenna is combined in the transmission capacity height of this referenced subcarrier, and its form is also unrestricted.
In step 43, be according to each reception antenna be combined in each referenced subcarrier transmission capacity parameter and, choose the first reception antenna combination.For example, the first reception antenna be combined as each referenced subcarrier transmission capacity parameter and for the maximum.In preferred embodiment, step 43 be according to each reception antenna be combined in each referenced subcarrier transmission capacity parameter reciprocal and, choose the first reception antenna combination.For example, the first reception antenna is combined as transmission capacity parameter reciprocal of each referenced subcarrier and is reckling.
In an embodiment, these referenced subcarriers are all these subcarriers.In another embodiment, the subclass that these referenced subcarriers are these subcarriers.For example, these referenced subcarriers are in these subcarriers, every multiple adjacent sub-carriers one of them.
In preferred embodiment, when these transmitting antennas are to adjust interleaving mode in the time that these subcarriers transmit multiple targeting sequencing, step 41 is in the time that these reception antennas are received first targeting sequencing of each subcarrier, to start to carry out to 43.Wherein, in the respective channels matrix producing in step 41, corresponding to the matrix element of each reception antenna of the reception antenna combination of this mimo channel, it is this first targeting sequencing receiving at other subcarriers of this referenced subcarrier or contiguous this referenced subcarrier according to this reception antenna and producing.
The above is to utilize preferred embodiment to describe the present invention in detail, but not limits the scope of the invention.Generally people familiar with these techniques all can understand, suitably does change and adjustment slightly, will not lose main idea of the present invention place, does not also depart from the spirit and scope of the present invention.
Claims (25)
1. a Receiving antenna selection method for multicarrier system, this multicarrier system has multiple transmitting antennas, multiple reception antenna and multiple subcarrier, and this system of selection comprises the following step:
Choose a part of of these subcarriers or all using as referenced subcarrier;
For these transmitting antennas respectively with each multiple channel that form of multiple reception antennas combination, produce the respective channels matrix of each channel at each referenced subcarrier, wherein each reception antenna combination comprises at least two these reception antennas;
According to this respective channels matrix, produce each reception antenna and be combined in a transmission capacity parameter of each referenced subcarrier; And
Be combined in this transmission capacity parameter of each referenced subcarrier according to each reception antenna, from these reception antenna combinations, choose one first reception antenna combination.
2. system of selection as claimed in claim 1, wherein this transmission capacity parameter is to produce according to determinant det (H ' H), wherein H is this channel this respective channels matrix at this referenced subcarrier, the associate matrix that H ' is H.
3. system of selection as claimed in claim 2, wherein the combination of this first reception antenna be according to each reception antenna be combined in each referenced subcarrier this transmission capacity parameter and and choose.
4. system of selection as claimed in claim 3, wherein the combination of this first reception antenna be each referenced subcarrier this transmission capacity parameter and be the maximum.
5. system of selection as claimed in claim 2, wherein the combination of this first reception antenna is be combined in this transmission capacity parameter reciprocal of each referenced subcarrier and and choose according to each reception antenna.
6. system of selection as claimed in claim 5, wherein the combination of this first reception antenna is this transmission capacity parameter reciprocal of each referenced subcarrier and is reckling.
7. system of selection as claimed in claim 1, wherein in the time that the reception antenna number of these number of transmit antennas and the combination of this reception antenna is identical, this transmission capacity parameter is to produce according to a determinant det (H), and wherein H is this channel this respective channels matrix at this referenced subcarrier.
8. system of selection as claimed in claim 1, wherein these referenced subcarriers are in these subcarriers, every multiple adjacent sub-carriers one of them.
9. system of selection as claimed in claim 1, wherein, when these transmitting antennas are to adjust interleaving mode in the time that these subcarriers transmit multiple targeting sequencing, this system of selection is in the time that these reception antennas are received first targeting sequencing of each subcarrier, to start to carry out.
10. system of selection as claimed in claim 9, wherein in the each respective channels matrix of this channel at each referenced subcarrier, corresponding to the matrix element of each reception antenna of the reception antenna combination of each this channel, it is this first targeting sequencing receiving at other subcarriers of this referenced subcarrier or contiguous this referenced subcarrier according to this reception antenna and producing.
11. systems of selection as claimed in claim 1, wherein this multicarrier system is orthogonal frequency division multiplex system.
The receiving antenna selection device of 12. 1 kinds of multicarrier systems, this multicarrier system has multiple transmitting antennas, multiple reception antenna and multiple subcarrier, and this choice device comprises:
Channel estimation unit, be coupled to these reception antennas, in order to choose a part of of these subcarriers or all using as referenced subcarrier, and produce each channel of multiple channels at the respective channels matrix of each referenced subcarrier, wherein these channels are formed with each of multiple reception antennas combination respectively by these transmitting antennas, and each reception antenna combines and comprises at least two these reception antennas; And
Antenna selected cell, is coupled to this channel estimation unit and these reception antennas, and this antenna selected cell comprises:
Computational logic, in order to according to this respective channels matrix, produces each reception antenna and is combined in the transmission capacity parameter of each referenced subcarrier; And
Select logic, according to this transmission capacity parameter, choose the first reception antenna combination in these reception antenna combinations.
13. choice devices as claimed in claim 12, wherein this computational logic is to produce this transmission capacity parameter according to determinant det (H ' H), wherein H is this channel this respective channels matrix at this referenced subcarrier, the associate matrix that H ' is H.
14. choice devices as claimed in claim 13, wherein this selection logic be according to each reception antenna be combined in each referenced subcarrier this transmission capacity parameter and, choose the combination of this first reception antenna.
15. choice devices as claimed in claim 14, wherein the combination of this first reception antenna be each referenced subcarrier this transmission capacity parameter and be the maximum.
16. choice devices as claimed in claim 13, wherein this selection logic be according to each reception antenna be combined in each referenced subcarrier this transmission capacity parameter reciprocal and, choose this first reception antenna combination.
17. choice devices as claimed in claim 16, wherein the combination of this first reception antenna is this transmission capacity parameter reciprocal of each referenced subcarrier and is reckling.
18. choice devices as claimed in claim 12, wherein in the time that the reception antenna number of these number of transmit antennas and the combination of this reception antenna is identical, this computational logic is to produce this transmission capacity parameter according to determinant det (H), and wherein H is this channel this respective channels matrix at this referenced subcarrier.
19. choice devices as claimed in claim 12, wherein these referenced subcarriers are in these subcarriers, every multiple adjacent sub-carriers one of them.
20. choice devices as claimed in claim 12, wherein when these transmitting antennas are to adjust interleaving mode in the time that these subcarriers transmit multiple targeting sequencing, this channel estimation unit is in the time that these reception antennas are received first targeting sequencing of each subcarrier, starts to produce this respective channels matrix.
21. choice devices as claimed in claim 20, wherein in the each respective channels matrix of this channel at each referenced subcarrier, corresponding to the matrix element of each reception antenna of the reception antenna combination of each this channel, it is this first targeting sequencing receiving at other subcarriers of this referenced subcarrier or contiguous this referenced subcarrier according to this reception antenna and producing.
22. choice devices as claimed in claim 12, wherein this multicarrier system is an orthogonal frequency division multiplex system.
The receiver of the multicarrier system of 23. 1 kinds of multiple input and output, this multicarrier system has multiple transmitting antennas and multiple subcarrier, and this receiver comprises:
Multiple reception antennas;
Channel estimation unit, be coupled to these reception antennas, in order to choose a part of of these subcarriers or all using as referenced subcarrier, and produce each channel of multiple channels at the respective channels matrix of each referenced subcarrier, wherein these channels are formed with each of multiple reception antennas combination respectively by these transmitting antennas, and each reception antenna combines and comprises at least two these reception antennas; And
Antenna selected cell, be coupled to this channel estimation unit and these reception antennas, in order to according to this respective channels matrix, produce the transmission capacity parameter that each reception antenna is combined in each referenced subcarrier, and according to this transmission capacity parameter, choose the first reception antenna combination in these reception antenna combinations.
24. receivers as claimed in claim 23, wherein when these transmitting antennas with a tune interleaving mode in the time that these subcarriers transmit multiple targeting sequencing, this channel estimation unit is in the time receiving first targeting sequencing of each subcarrier, starts to produce this respective channels matrix.
25. receivers as claimed in claim 24, more comprise:
Channel equalizer; And
Counting circuit, is coupled to this channel estimation unit, after starting at each reception antenna of this first reception antenna combination, carries out the calculating of this channel equalizer coefficients;
Wherein, this counting circuit is, before these targeting sequencings of receiving in this channel estimation unit finish, to complete the calculating of this channel equalizer coefficients.
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| WO2012045213A1 (en) * | 2010-10-09 | 2012-04-12 | 中兴通讯股份有限公司 | Method and device for multiple input multiple output configuration in multiple carrier system |
| CN108306659B (en) * | 2018-01-11 | 2020-11-03 | 京信通信系统（中国）有限公司 | Antenna selection method and device |
| CN109407084B (en) * | 2018-08-30 | 2023-05-05 | 河海大学 | Radar target positioning method based on Chan improved algorithm and data fusion |
| CN113169774B (en) * | 2018-12-03 | 2022-10-28 | 华为技术有限公司 | Antenna selection method and device |
| CN109861697B (en) * | 2019-01-23 | 2021-03-30 | 努比亚技术有限公司 | Antenna performance optimization method and device, terminal and computer readable storage medium |
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