CN101437008A - Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof - Google Patents
Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof Download PDFInfo
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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, refer to a kind of receiver and receiving antenna selection device and method of multicarrier system of multiple input and output especially.
Background technology
In communication system now, in order to reach higher transmission rate and wider transmission range, the multiple input and output of normal utilization (Multiple Input Multiple Output, abbreviation MIMO) technology, that is use many transmit antennas and reception antenna, to allow transmitting a plurality of signal flows independent of each other (signal stream) simultaneously.Though the MIMO technology can increase system effectiveness, use many reception antennas can make the wasted work of receiver of system increase.Therefore, how selecting the preferable antenna of input usefulness effectively in all reception antennas, is very important for reducing wasted work.When the same time was only transmitted a signal flow, can select several the strongest reception antennas of signal energy was the received signal source, to carry out input.But, when a plurality of signal flows transmit together,,, and fail to bring about tangible results if select antenna according to the intensity of received signal because signal flow can interfere with each other to each other.
With regard to multicarrier (multi-carrier) system, orthogonal frequency division multiplex (MUX) (orthogonalfrequency division multiplexing for example, be called for short OFDM) system, because it transmits signal at a plurality of subcarriers (sub-carrier) simultaneously, thereby it is when utilizing MIMO technology transfer multiple signal stream, signal flow interference cases to each other can be complicated more, if directly choosing several the strongest reception antennas of signal energy carries out input, 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, to choose the reception antenna combination that the tool better signal detects usefulness, elevator system usefulness effectively.
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 be transferred when interleaving (tone-interleaved) mode and transmitting targeting signal (preamble signal) in multicarrier system, choose the reception antenna combination that the tool better signal detects usefulness efficiently, with elevator system usefulness.
One of the object of the invention is to provide a kind of receiver of multicarrier system of multiple input and output, and it can utilize special reception antenna choice mechanism, chooses the reception antenna combination that the tool better signal detects usefulness effectively, with elevator system usefulness.
In one embodiment of the invention, disclose a kind of reception antenna system of selection of multicarrier system.This multicarrier system has a plurality of transmitting antennas, a plurality of reception antenna and a plurality of subcarrier, and these subcarriers comprise a plurality of by reference subcarrier.This system of selection comprises the following step: for these transmitting antennas respectively with each formed a plurality of channel of a plurality of reception antennas combination, produce each channel at each by the respective channels matrix of reference subcarrier (channel matrix), wherein the combination of each reception antenna comprises at least one reception antenna; According to this respective channels matrix, produce each reception antenna and be combined in each by the transmission capacity parameter of reference subcarrier (capacity parameter), wherein this transmission capacity parameter is to be combined in this by the transmission capacity of reference subcarrier corresponding to this reception antenna; And be combined in each by the transmission capacity parameter of reference subcarrier according to each reception antenna, from the combination of these reception antennas, choose the 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 a plurality of transmitting antennas, a plurality of reception antenna and a plurality of subcarrier, and these subcarriers comprise a plurality of by reference subcarrier.This choice device comprises: channel estimation unit, be coupled to these reception antennas, in order to each channel of producing a plurality of channels at each by the respective channels matrix of reference subcarrier, wherein these channels are formed with each of a plurality of reception antennas combination respectively by these transmitting antennas, and each reception antenna makes up 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 each reception antenna and be combined in each by the transmission capacity parameter of reference subcarrier, and according to this transmission capacity parameter, choose these reception antennas and make up one of them, choose each reception antenna in the combination to start this.
Description of 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 difference mode between transferring.
2B figure is presented under the load mode of 2A figure, the targeting signal that each reception antenna received.
3A figure shows that three transmitting antennas transmit an example of targeting signal in difference mode between transferring.
3B figure is presented under the load mode of 3A figure, the targeting signal that each reception antenna received.
The 4th figure is the flow chart of an embodiment of the reception antenna system of selection 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: the antenna selected cell
123: counting circuit 124: channel equalizer
125: the signal detection circuit
21,22,31,32,33: during the targeting sequencing
Embodiment
In the embodiment of the following stated, multicarrier system is to be example with the ofdm system.Only the 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, is not limited to ofdm system so scope of the present invention is worked as.
The 1st figure is according to one embodiment of the present of invention, illustrates the Organization Chart of multicarrier system.Among the figure, multicarrier system 1 is the 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 is represented RX path, and it comprises reception antenna 1211 and OFDM unit 1212.Multicarrier system 1 is before passing the receipts data, transmitter 11 can transmit specific targeting signal earlier, each reception antenna 1211 is after receiving this targeting signal, after handling (comprising demodulation from radio frequency to fundamental frequency, analogy) via OFDM unit 1212, deliver to receiving antenna selection device 122 again to the conversion of numerical digit, OFDM decoding or the like.Targeting signal after receiving antenna selection device 122 can be handled according to each OFDM unit 1212, the wherein Na that chooses Nr receiver module 121 is individual, be used for the receiver/transmitter 11 follow-up data that transmit, and other receiver modules that are not selected 121 are closed, to reach power saving effect.On the other hand, behind receiving antenna selection device 122 selected Na receiver modules 121, counting circuit 123 can carry out the calculating of channel equalizer 124 coefficients.124 of channel equalizers carry out the action such as gradeization of the data that receives after treating the coefficient decision, deliver to signal deteching circuit 125 again and detect.
Because receiving antenna selection device 122 is to choose Na from Nr receiver module 121, thereby the selection mode that can consider is total
Kind, wherein each respectively represents the reception antenna combination.For arbitrary reception antenna combination S, itself and Nt 111 of transmitting antenna can form mimo channel and (therefore can form altogether
Individual mimo channel).If multicarrier system 1 has n subcarrier, then this mimo channel is at k subcarrier (k=0
-N-1) pairing channel matrix is
In the formula (1-1), each matrix element (matrix element) is 1211 channel responses at k subcarrier of each reception antenna of representing each transmitting antenna 111 and reception antenna combination S respectively.For example,
Promptly represent first reception antenna 1211 and 111 channel responses of Nt transmitting antenna of reception antenna combination S at k subcarrier.
Based on the channel matrix of formula (1-1), this mimo channel in the transmission capacity (capacity) of the best of k subcarrier is
Wherein, I is unit matrix (identity matrix), and γ is that the news of receiving terminal are assorted than (SNR),
Be H
S(k) conjugate transpose (Hermitian) matrix.Formula (1-2) is that the technical field of the invention has and knows that usually the knowledgeable knows, and seldom does explanation herein.About further instruction, see also 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 the best transmission capacity.Shown in the formula (1-2) mimo channel (and corresponding reception antenna combination) at best transmission capacity that single subcarrier had, and because multicarrier system 1 is to utilize n subcarrier passing the receipts data simultaneously, therefore when choosing the 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 a plurality of by the transmission capacity that reference subcarrier had respectively in n the subcarrier, make up with the reception antenna of choosing the best transmission capacity that can reach whole.In an embodiment, receiving antenna selection device 122 is to consider all n subcarrier, that is these are this n subcarrier by reference subcarrier.In another embodiment, receiving antenna selection device 122 is subcarriers (being that these are by the subclass of reference subcarrier for 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; During 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 Nr OFDM unit 1212 respectively, and the targeting signal after handling according to OFDM unit 1212, produce each mimo channel at each by the respective channels matrix of reference 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 the antenna selected cell 1222 can be produced according to channel estimation unit 1221, produce each mimo channel (and the combination of corresponding reception antenna) at each by the transmission capacity parameter of reference subcarrier.Transmission capacity parameter herein be corresponding to this mimo channel at this by the transmission capacity of reference subcarrier (for example, the best transmission capacity shown in the formula (1-2)), can in order to represent this mimo channel at this by the transmission capacity of reference subcarrier height.The corresponding reception antenna of supposing this mimo channel is combined as S, and this is a k subcarrier by reference subcarrier, and then can produce following various forms of transmission capacity parameter according to formula (1-2): (1) is directly with the determinant in the formula (1-2)
As the transmission capacity parameter, but required operand is bigger.(2) receiving terminal news assorted than γ bigger in, can ignore the influence of noise, thereby the determinant that can simplify
Be used as the transmission capacity parameter, to save operand.(3) when the number Na of the number Nt of transmitting antenna 111 and the reception antenna 1211 of reception antenna combination S is identical, the determinant det (H that then can more simplify
S(k)) as the transmission capacity parameter, significantly to reduce required operand.It should be noted that as long as the transmission capacity parameter can be in order to represent mimo channel by the transmission capacity of reference subcarrier height its form and unrestrictedly.
Further, the selection logic in the antenna selected cell 1222 promptly is combined in each by the transmission capacity parameter of reference subcarrier according to each reception antenna, from
Choose the combination of first reception antenna in the individual 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 the antenna selected cell 1222 be according to each reception antenna be combined in each by the transmission capacity parameter of reference subcarrier and choose first reception antenna combination.For example, first reception antenna be combined as each by the transmission capacity parameter of reference subcarrier and for the maximum.In first preferred embodiment, the selection logic in the antenna selected cell 1222 be according to each reception antenna be combined in each by the inverse of the transmission capacity parameter of reference subcarrier and, choose first reception antenna combination.For example, first reception antenna be combined as each by the inverse of the transmission capacity parameter of reference subcarrier and for reckling.In first preferred embodiment, subcarrier that can channel response is relatively poor amplifies for the weight of entire effect.So, (channel coding rate) is bigger for channel encoding rate, and just the relatively poor situation of coding protection ability has tangible performance improvements.
In second preferred embodiment, if Nt transmitting antenna 111 of multicarrier system 1 is to transfer interleaving mode, transmit the targeting signal that comprises a plurality of targeting sequencings in n subcarrier, then channel estimation unit 1221 is when reception antenna 1211 is received first targeting sequencing of each subcarrier, begin to produce each mimo channel at each by the respective channels matrix of reference subcarrier, that is begin to carry out the selection of reception antenna 1211.And, in this respective channels matrix, corresponding to the matrix element of each reception antenna 1211 in the combination of the reception antenna of each mimo channel, be to be produced by first targeting sequencing that other subcarriers of reference subcarrier received by reference subcarrier or contiguous this at this according to this reception antenna 1211.In this second preferred embodiment, each targeting sequencing is the OFDM symbol sign indicating number (symbol) for carrying training sequence (training sequence), and transfer the load mode that interleaves is expression, and at one time, different transmitting antennas 111 all transmit targeting sequencing on different subcarriers.Therefore, receiver 12 can be distinguished targeting sequencing from different transmit antennas 111 according to the position of subcarrier when receiving targeting signal.In addition, counting circuit 123 can carry out the calculating of the coefficient of channel equalizer 124 after antenna selected cell 1222 starts each reception antenna 1211 of first reception antenna combination.Owing to when receiving first targeting sequencing, promptly begin to carry out the selection of reception antenna ahead of time, therefore before harvesting all targeting sequencings, counting circuit 123 just can be finished the action of design factor.Because and then the targeting sequencing back is exactly data usually, and by before targeting sequencing finishes, promptly configuring coefficient, channel equalizer 124 just can in time carry out the action such as gradeization of data, then signal deteching circuit 125 also can in time carry out the detection of data, and can not cause extra detection to postpone, but elevator system usefulness like this.
Below, further specify second preferred embodiment respectively with two situations with three transmitting antennas 111.2A figure shows that two transmitting antennas 111 (with T x 1 and T x 2 representatives) transmit an example of targeting signal in difference mode between transferring.Wherein, this targeting signal comprises sequence _ 1 and sequence _ 2, and it represents the targeting sequencing that only passes in even number and odd subcarriers respectively.On the other hand, the targeting signal that each reception antenna 1211 is received is then shown in 2B figure, wherein, during first targeting sequencing 21, each reception antenna 1211 be receive T x 1 at targeting sequencing that even subcarriers passed and T x 2 at targeting sequencing that odd subcarriers passed; And during second targeting sequencing 22,1211 of each reception antennas receive T x 1 at targeting sequencing that odd subcarriers passed and T x 2 at targeting sequencing that even subcarriers passed.As mentioned before, because contiguous subcarrier has close channel response and transmission capacity, so when the selective reception combination of antennas, can only consider the subcarrier of odd number or even number.Therefore, situation at two transmitting antennas 111, if with the subcarrier of only considering even number (that is be by reference subcarrier with even subcarriers) is example, then working as channel estimation unit 1221 will be according to first targeting sequencing of each subcarrier of receive, produce each mimo channel when the respective channels matrix of even subcarriers, corresponding to the matrix element of each reception antenna 1211 of the reception antenna of this mimo channel combination, be to produce at first targeting sequencing that odd subcarriers received of this even subcarriers or contiguous this even subcarriers according to this reception antenna 1211.That is the channel matrix of formula (1-1) can be expressed as
In the formula (1-3), ySm, 1 (2k) are m (m=1 of reception antenna combination S
-Na) reception antenna 1211 channel responses at 2k subcarrier, and this channel response are through the compensation of m reception antenna 1211 at first targeting sequencing (being sequence _ 1) of 2k subcarrier reception; YSm, 2 (2k+1) then are m reception antenna 1211 channel responses at 2k+1 subcarrier, and this channel response is through the compensation of m reception antenna 1211 at first targeting sequencing (being sequence _ 2) of 2k+1 subcarrier reception.
3A figure shows that three transmitting antennas 111 (with T x 1, T x 2 and T x 3 representatives) transmit an example of targeting signal in difference mode between transferring.Wherein, sequence _ 1, sequence _ 2 and sequence _ 3 are represented respectively and are only passed at 3k, the individual targeting sequencing that reaches 3k+2 subcarrier of 3k+1.Shown in 3A figure, during same targeting sequencing 31,32 or 33, T x 1, T x 2 and T x 3 transmit different targeting sequencings respectively.On the other hand, for each reception antenna 1211, the signal that it received is then shown in 3B figure.In this example, can utilize during first targeting sequencing 31 equally, the targeting sequencing that each subcarrier received, produce each mimo channel at each by the respective channels matrix of reference subcarrier, wherein be can be 3k, 3k+1 or 3k+2 subcarrier by reference subcarrier, be to be example with 3k subcarrier herein.Therefore, the channel matrix of formula (1-1) can be expressed as
In the formula (1-4), ySm, 1 (3k) are m (m=1 of reception antenna combination S
-Na) reception antenna 1211 channel responses at 3k subcarrier, and this channel response are through the compensation of m reception antenna 1211 at first targeting sequencing (being sequence _ 1) of 3k subcarrier reception; YSm, 2 (3k+1) then are m reception antenna 1211 channel responses at 3k+1 subcarrier, and this channel response is through the compensation of m reception antenna 1211 at first targeting sequencing (being sequence _ 2) of 3k+1 subcarrier reception; YSm, 3 (3k+1) then are m reception antenna 1211 channel responses at 3k+2 subcarrier, and this channel response is through the compensation of m reception antenna 1211 at first targeting sequencing (being sequence _ 3) of 3k+2 subcarrier reception.
The 4th figure is the flow chart of embodiment of the reception antenna system of selection of multicarrier system of the present invention.This multicarrier system has a plurality of transmitting antennas, a plurality of reception antenna and a plurality of subcarrier, and these subcarriers comprise a plurality of by reference subcarrier.Shown in the 4th figure, this flow process comprises the following step:
Step 41: for these transmitting antennas respectively with each formed a plurality of mimo channel of a plurality of reception antennas combination, produce each mimo channel at each by a corresponding channel matrix of reference subcarrier;
Step 42:, produce each reception antenna and be combined in each by a transmission capacity parameter of reference subcarrier according to this respective channels matrix; And
Step 43: be combined in each by the transmission capacity parameter of reference subcarrier according to each reception antenna, from these reception antenna combinations, choose the combination of first reception antenna.
In the step 41, each reception antenna combination comprises at least two these reception antennas.In the step 42, this transmission capacity parameter is in order to representing this reception antenna to be combined in this by the transmission capacity of reference subcarrier height, and its form is also unrestricted.
In the step 43, be according to each reception antenna be combined in each by the transmission capacity parameter of reference subcarrier and, choose first reception antenna combination.For example, first reception antenna be combined as each by the transmission capacity parameter of reference subcarrier and for the maximum.In preferred embodiment, step 43 be according to each reception antenna be combined in each by the inverse of the transmission capacity parameter of reference subcarrier and, choose first reception antenna combination.For example, first reception antenna be combined as each by the inverse of the transmission capacity parameter of reference subcarrier and for reckling.
In an embodiment, these are all these subcarriers by reference subcarrier.In another embodiment, these are the subclass of these subcarriers by reference subcarrier.For example, these are in these subcarriers by reference subcarrier, every a plurality of adjacent sub-carriers one of them.
In preferred embodiment, when these transmitting antennas to transfer interleaving mode when these subcarriers transmit a plurality of targeting sequencing, step 41 is to begin to carry out when these reception antennas are received first targeting sequencing of each subcarrier to 43.Wherein, in the respective channels matrix that step 41 produced, corresponding to the matrix element of each reception antenna of the reception antenna of this mimo channel combination, be to be produced by this first targeting sequencing that other subcarriers of reference subcarrier received by reference subcarrier or contiguous this at this according to this reception antenna.
The above is to utilize preferred embodiment to describe the present invention in detail, but not limits the scope of the invention.Generally know this type of skill personage and all can understand, suitably do slightly change and adjustment, will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention.
Claims (25)
1. the reception antenna system of selection of a multicarrier system, this multicarrier system has a plurality of transmitting antennas, a plurality of reception antenna and a plurality of subcarrier, and this system of selection comprises the following step:
Choose a part of of these subcarriers or all with as by reference subcarrier;
For these transmitting antennas respectively with each formed a plurality of channel of a plurality of reception antennas combination, produce each channel at each by the respective channels matrix of reference 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 each by a transmission capacity parameter of reference subcarrier; And
Be combined in each by this transmission capacity parameter of reference subcarrier according to each reception antenna, from these reception antenna combinations, choose the combination of one first reception antenna.
2. as apply for a patent 1 described system of selection, wherein this transmission capacity parameter be according to determinant det (H ' H) produce, wherein H be this channel at this by this respective channels matrix of reference subcarrier, H ' is the conjugate transpose matrix of 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 by this transmission capacity parameter of reference subcarrier and and choose.
4. system of selection as claimed in claim 3, wherein the combination of this first reception antenna be each by this transmission capacity parameter of reference subcarrier and be the maximum.
5. 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 by the inverse of this transmission capacity parameter of reference subcarrier and and choose.
6. system of selection as claimed in claim 5, wherein the combination of this first reception antenna be each by the inverse of this transmission capacity parameter of reference subcarrier and be reckling.
7. as applying for a patent 1 described system of selection, wherein when 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), wherein H be this channel at this by this respective channels matrix of reference subcarrier.
8. as apply for a patent 1 described system of selection, wherein these are in these subcarriers by reference subcarrier, every a plurality of adjacent sub-carriers one of them.
9. as apply for a patent 1 described system of selection, wherein when these transmitting antennas to transfer interleaving mode when these subcarriers transmit a plurality of targeting sequencing, this system of selection is to begin execution when these reception antennas are received first targeting sequencing of each subcarrier.
10. system of selection as claimed in claim 9, wherein in this channel respectively each by the respective channels matrix of reference subcarrier in, corresponding to the matrix element of each reception antenna of the reception antenna combination of this channel respectively, be to be produced by this first targeting sequencing that other subcarriers of reference subcarrier received by reference subcarrier or contiguous this at this according to this reception antenna.
11. as apply for a patent 1 described system of selection, wherein this multicarrier system is the orthogonal frequency division multiplex system.
12. the receiving antenna selection device of a multicarrier system, this multicarrier system have a plurality of transmitting antennas, a plurality of reception antenna and a plurality of subcarrier, 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 with as by reference subcarrier, and each channel that produces a plurality of channels at each by the respective channels matrix of reference subcarrier, wherein these channels are formed with each of a plurality of reception antennas combination respectively by these transmitting antennas, and each reception antenna makes up and comprises at least two these reception antennas; And
The 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 each by the transmission capacity parameter of reference subcarrier; And
Select logic,, choose first reception antenna combination in these reception antenna combinations according to this transmission capacity parameter.
13. choice device as claimed in claim 12, wherein this computational logic be according to determinant det (H ' H) produces this transmission capacity parameter, wherein H be this channel at this by this respective channels matrix of reference subcarrier, H ' is the associate matrix of H.
14. choice device as claimed in claim 13, wherein this selection logic be according to each reception antenna be combined in each by this transmission capacity parameter of reference subcarrier and, choose the combination of this first reception antenna.
15. choice device as claimed in claim 14, wherein the combination of this first reception antenna be each by this transmission capacity parameter of reference subcarrier and be the maximum.
16. choice device as claimed in claim 13, wherein this selection logic be according to each reception antenna be combined in each by the inverse of this transmission capacity parameter of reference subcarrier and, choose the combination of this first reception antenna.
17. choice device as claimed in claim 16, wherein the combination of this first reception antenna be each by the inverse of this transmission capacity parameter of reference subcarrier and be reckling.
18. choice device as claimed in claim 12, wherein when 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), wherein H be this channel at this by this respective channels matrix of reference subcarrier.
19. choice device as claimed in claim 12, wherein these are in these subcarriers by reference subcarrier, every a plurality of adjacent sub-carriers one of them.
20. choice device as claimed in claim 12, wherein when these transmitting antennas to transfer interleaving mode when these subcarriers transmit a plurality of targeting sequencing, this channel estimation unit is when these reception antennas are received first targeting sequencing of each subcarrier, begins to produce this respective channels matrix.
21. as the 20th described choice device of claim, wherein in this channel respectively each by the respective channels matrix of reference subcarrier in, corresponding to the matrix element of each reception antenna of the reception antenna combination of this channel respectively, be to be produced by this first targeting sequencing that other subcarriers of reference subcarrier received by reference subcarrier or contiguous this at this according to this reception antenna.
22. choice device as claimed in claim 12, wherein this multicarrier system is an orthogonal frequency division multiplex system.
23. the receiver of the multicarrier system of multiple input and output, this multicarrier system have a plurality of transmitting antennas and a plurality of subcarrier, this receiver comprises:
A plurality of reception antennas;
Channel estimation unit, be coupled to these reception antennas, in order to choose a part of of these subcarriers or all with as by reference subcarrier, and each channel that produces a plurality of channels at each by the respective channels matrix of reference subcarrier, wherein these channels are formed with each of a plurality of reception antennas combination respectively by these transmitting antennas, and each reception antenna makes up and comprises at least two these reception antennas; And
The antenna selected cell, be coupled to this channel estimation unit and these reception antennas, in order to according to this respective channels matrix, produce each reception antenna and be combined in each by the transmission capacity parameter of reference subcarrier, and, choose first reception antenna combination in these reception antenna combinations according to this transmission capacity parameter.
24. receiver as claimed in claim 23, wherein transfer interleaving mode when these subcarriers transmit a plurality of targeting sequencing with one when these transmitting antennas, this channel estimation unit is when receiving first targeting sequencing of each subcarrier, begins to produce this respective channels matrix.
25. receiver as claimed in claim 24 more comprises:
Channel equalizer; And
Counting circuit is coupled to this channel estimation unit, after starting in order to each reception antenna in this first reception antenna combination, carries out the calculating of this channel equalizer coefficients;
Wherein, this counting circuit is finished the calculating of this channel equalizer coefficients before being these targeting sequencings end that receive in this channel estimation unit.
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| CN109861697A (en) * | 2019-01-23 | 2019-06-07 | 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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| CN109861697A (en) * | 2019-01-23 | 2019-06-07 | 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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