CN106411382A - Beam space time coding and transmit diversity - Google Patents
Beam space time coding and transmit diversity Download PDFInfo
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- CN106411382A CN106411382A CN201611168966.1A CN201611168966A CN106411382A CN 106411382 A CN106411382 A CN 106411382A CN 201611168966 A CN201611168966 A CN 201611168966A CN 106411382 A CN106411382 A CN 106411382A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0625—Transmitter arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
- H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
Methods and apparatus for increasing diversity gain at a receiver by applying beamforming to transmit diversity space-time coded signals. Transmit diversity can be provided at a signal source by space-time coding the signal. A transmit signal is space-time coded over a plurality of space-time antenna groups, with each space-time antenna group associated with a specific space-time code. The signal at each space-time antenna group is beamformed over the plurality of antenna in the space-time antenna group. Each of the plurality of antenna in a space-time antenna group is weighted with a distinct weight, relative to the other antenna in the space-time group. Each weight can have a distinct amplitude, phase, or combination of amplitude and phase. The weights can be static or dynamic. The dynamic weights can vary amplitude, phase, or a combination of amplitude and phase of each weight over time.
Description
The application is to be December 18, Application No. 200780047415.2, invention entitled " wave beam in 2007 applying date
The divisional application of the Chinese patent application of Space Time Coding and transmission diversity ".
Claimed priority based on 35U.S.C. § 119
Patent application claims enjoy on December 19th, 2006 submission, entitled " BEAM SPACE TIME CODING
Provisional application No.60/870 of AND TRANSMIT DIVERSITY ", 653 priority, this provisional application is transferred to this Shen
Assignee please, and be expressly incorporated herein from there through quoting.
Background technology
Wireless Telecom Equipment is configured to be operated in a variety of operating conditions and operating environments.Set based on mobile wireless
The standby position with respect to sending signal source, this mobile wireless device can experience violent change in terms of signal quality.Signal
Change in quality can be characterized by linking the transmitter to the change in the wireless channel of wireless receiver.
There is the factor that many has been contributed to wireless channel.For example, received signal strength is with transmitter and receiver
The distance between increase and reduce.In addition, the presence of the change of landform and barrier and reflecting surface all produces tribute to multipath
Offer.Can constructively or devastatingly combine through the signal of the multiple signal paths from transmitted from transmitter to receiver.For example, by
Phase place in multi-path signal-component and the destructive signal combination that leads to can lead to be significantly reduced to receiver
The signal quality at place.Lowered signal quality is commonly known as signal fadeout, or referred to as declines.
Wireless communication system can be implemented various technology to compensate the probability being operated under deep fade.Radio communication system
System can be implemented signal diversifying to help compensate for declining.Diversity typically refers to implement certain type of redundancy to provide or to parse solely
Vertical signal path.
Transmitter different analytic signal can provide diversity so that receiver has receives reconciliation by introducing
Separate out the probability of the increase of signal transmitted.Transmitter can be by using multiple transmitting antennas, multiple tranmitting frequency, Duo Gefa
Penetrate the time or some of combines and to introduce diversity.
For example, send diversity and can send this symbol by from an antenna transmission original information symbol and from the second antenna
Number revision originally realized.The revision of this original symbol may refer to this original symbol be delayed by, ask conjugation, negate,
The version of the combination of rotation etc. or some or all above-mentioned process.The signal being rotated refers to signal phase with respect to benchmark
Multiple rotation.Receiver is processed to the whole receipt signals in one or more symbol periods, to recover sent symbol.
Similarly, receiver can provide limited amount diversity by using multiple space diversity reception antennas.Preferably
Ground, will be spaced a distance for the plurality of reception antenna, and this distance enables each antenna to experience and other reception antenna institutes
The unrelated characteristic of channel of channel of experience.
Content of the invention
Provide for by being applied to increase receiver through the signal sending diversity Space Time Coding beam shaping
The method and apparatus of the diversity gain at place.Transmission diversity can be provided by signal is carried out with Space Time Coding at signal source.
Multiple space-time antenna sets carry out Space Time Coding to sending signal, wherein each space-time antenna sets and a specific space-time code-phase
Association.Multiple antennas in each space-time antenna sets carry out beam shaping to the signal at this space-time antenna sets.Relatively
For other antennas in space-time antenna sets, using different weightings come to each in the multiple antennas in this space-time antenna sets
Antenna is weighted.Each weighting can have the combination of different amplitudes, phase place or amplitude and phase place.This weighting can be
Static or dynamic.Dynamic weighting can change over the combination of the amplitude, phase place or amplitude and phase place of each weighting.
The aspect of the disclosure includes transmitter system, this transmitter system include transmitter, send diversity encoder and
Multiple beamforming encoder, described transmitter is configurable to generate sending signal stream, and described transmission diversity encoder is configured
For receiving described sending signal stream and according to described sending signal stream generation multiple (G) through sending diversity/Space Time Coding
Transmission stream, each encoder in the plurality of beamforming encoder be configured to receive multiple through sending diversity/skies
When one of the transmission stream that encodes and generate the subflow that multiple (K) are weighted, with to multiple through sending diversity/skies
When encode send stream in one transmission flow to traveling wave beam shaping.
The aspect of the disclosure is included for introducing the method sending diversity.The method includes generating transmission stream, by described
Send flow point to be segmented into multiple (G) signal stream, diversity/Space Time Coding is transmitted to described G signal stream, right over k antennas
Each in described G signal stream carries out beam shaping, and sends the described G signal through beam shaping.
The aspect of the disclosure includes transmitter system, and this transmitter system includes, for generating the module sending stream, being used for
Diversity/Space Time Coding is transmitted to generate the G encoded module sending stream to the described stream that sends, for described G
Coding send in stream each carry out beam shaping generating the module of the G group through beam shaping, and be used for sending institute
State multiple antennas of the G group through beam shaping.
The aspect of the disclosure includes the computer-readable medium with computer program, and described computer program is used for executing
Following steps, including：Receive and send stream, diversity/Space Time Coding is transmitted to G signal stream, and is added with using corresponding
Weight vector each signal stream in described G signal stream is weighted with to each signal stream in described G signal stream
Carry out beam shaping.
Brief description
According to the detailed description illustrating below in conjunction with the accompanying drawings, the feature of embodiment of the disclosure, objects and advantages will become
Become apparent from, in the accompanying drawings, similar element has similar reference marker.
Fig. 1 is the simplification functional-block diagram of an embodiment of wireless communication system.
Fig. 2 is the simplification functional-block diagram of an embodiment of the transmitter and receiver in multi-address radio communication system.
Fig. 3 is the simplification functional-block diagram of an embodiment of transmitter system, wherein this transmitter system have through
The Space Time Coding of beam shaping sends diversity.
Fig. 4 is the simplification functional-block diagram of an embodiment of transmitter system, wherein this transmitter system have through
The Space Time Coding of beam shaping sends diversity.
Fig. 5 is a reality providing the method sending diversity using the transmission diversity/Space Time Coding through beam shaping
Apply the simplified flowchart of example.
Fig. 6 is the simplification of an embodiment of the transmitter system with the Space Time Coding transmission diversity through beam shaping
Functional-block diagram.
Specific embodiment
Describe the method and apparatus for generating and send wireless signal, its combine transmission diversity/Space Time Coding and
The benefit of beam shaping.Transmitter is equipped with N number of transmitting antenna.Subsequently, this N number of transmitting antenna is divided into G group antenna, wherein
G≤N.In every group of antenna, using weighing vector Wg=[wg1wg2... wg,N/G] described antenna is weighted, to be formed
Wave beam.
Initial is G subflow by the information stream diversity/Space Time Coding needing to send.Using one group of antenna come to these
Each subflow in subflow carries out beam shaping and transmission.
Fig. 1 is the simplification functional-block diagram of an embodiment of multi-address radio communication system 100.Multi-address radio communication system
100 include multiple cells, such as cell 102,104 and 106.In the embodiment in figure 1, each cell 102,104 and 106 are permissible
Including access point 105, this access point 105 includes multiple sectors.
The plurality of sector is made up of multigroup antenna, and wherein every group of antenna is responsible for and the access terminal in a part for this cell
Communication.In cell 102, antenna sets 112,114 respectively correspond to a different sector with 116.For example, cell 102 quilt
It is divided into three sector 120a-120c.First antenna 112 serves the first sector 102a, and the second fan served by the second antenna 114
Area 102b, and third antenna 116 serves the 3rd sector 102c.In cell 104, antenna sets 118,120 and 122 are each right
Ying Yuyi different sector.In cell 106, antenna sets 124,126 respectively correspond to a different sector with 128.
Each cell is configured to support or otherwise serve to enter with one or more sectors of corresponding access point
Some access terminals of row communication.For example, access terminal 130 and 132 is communicated with access point 142, access terminal 134 and 136 with
Access point 144 communicates, and access terminal 138 and 140 is communicated with access point 146.Although by access point 142,144 and 146
Each be shown as communicating with two access terminals, but each access point 142,144 and 146 be not limited to and two access eventually
End communication, but any number of access terminal of up to a certain limits value can be supported, this limits value can be physical restriction
Value or the limits value forced by communication standard.
As it is used herein, access point could be for the fixed station with terminal communication, access point is referred to as base
Stand, node B or some other terms and include some or all functions of base station, node B or some other terms.Access eventually
End (AT) be referred to as user's set (UE), user terminal, Wireless Telecom Equipment, terminal, mobile terminal, mobile station or some
Other terms, and include user's set (UE), user terminal, Wireless Telecom Equipment, terminal, mobile terminal, mobile station or
Some or all functions of other terms a bit.
It will be seen from figure 1 that each access terminal 130,132,134,136,138 and 140 be located at its each in cell with
In the different piece that each other access terminal in this same cell are compared.Additionally, each access terminal can with correspond to
The antenna sets of the access point communicating with are at a distance of different distances.In addition to the environment in cell and other condition, this
Two factors are each provided with the antenna making in each access terminal with corresponding to the access point communicating with this access terminal
The situation of different channels condition is assumed between group.
Make each access terminal (such as 130) be usually subjected to any other access eventually due to the channel condition being continually changing
Unique characteristic of channel that end does not experience.Additionally, the characteristic of channel is changed over and is changed due to the change of position.Connect
The antenna that access point (such as 142,144 and 146) can be configured to realize dynamically changing to the antenna in each antenna sets adds
Power, to improve the signal diversifying of experience at access terminal 130,132,134,136,138 and 140.
Above example can using as shown in Figure 2 send (TX) processor 220 or 260, processor 230 or
270 and memorizer 232 or 272 realizing.These processes can be held with processor in office, controller or other processing equipment
OK, and can be as source code, object code or be stored in other forms can as computer in computer-readable medium
Reading instruction.
Fig. 2 is the simplification function box of an embodiment of the transmitter and receiver in multi-address radio communication system 200
Figure.At transmitter system 210, provide the business number of multiple data flows from data source 212 to transmission (TX) data processor 214
According to.In one embodiment, each data flow sends over a respective transmit antenna.TX data processor 214 is based upon each
The specific coding scheme that data flow selects, the business datum of this data flow is formatted, encodes and interweaves, to provide
Coded data.In certain embodiments, TX data processor 214 is just being sent to based on the symbol of data flow user and
Send the antenna of this symbol, beam shaping weighting is applied to the symbol of this data flow.In certain embodiments, can be based on
Channel response information indicates the biography between access point and access terminal generating beam shaping weighting, wherein this channel response information
The condition in defeated path.Additionally, in those cases of scheduled transmissions, TX data processor 214 can be based on and send out from user
The rank information (rank information) sent is selecting packet format.
Using OFDM technology, the coded data of each data flow and pilot data can be multiplexed.This pilot number
According to the well known data pattern typically processing in a known manner, and can be used for estimating channel response at receiver system.
Come to multiple subsequently, based on the certain modulation schemes (for example, BPSK, QPSK, M-PSK or M-QAM) selecting for each data flow
The coded data of pilot data and this data flow is modulated, to provide modulation symbol.The data speed of each data flow
Rate, coding and modulation can be determined using the instruction being provided by processor 230.In certain embodiments, parallel spatial stream
Number can change according to the rank information sending from user.
Subsequently, the modulation symbol of all data flows is supplied to TX MIMO processor 220, this TX MIMO processor 220
Further modulation symbol can be processed (for example, for OFDM).TX MIMO processor 220 is subsequently by NTIndividual symbol stream
N is providedTIndividual transmitter (TMTR) 220a to 222t.TX MIMO processor 220 is according to subscriber channel response message, based on number
According to the symbol user being just sent to and the antenna sending this symbol of stream, beam shaping weighting is applied to this data
The symbol of stream.
Each transmitter 222a to 222t receives and processes respective symbol stream to provide one or more analogue signals, and
And further analogue signal is adjusted (for example, amplify, filtering and up-conversion) with provide be suitable for mimo channel upload
Defeated modulated signal.Subsequently, the N of spontaneous emission in future machine 222a to 222tTIndividual modulated signal is respectively from NTIndividual antenna 224a arrives
224t is being transmitted.
At receiver system 250, by NRIndividual antenna 252a to 252r receives sent modulated signal, and in the future
It is supplied to corresponding receiver (RCVR) 254 from the received signal of each antenna 252.Each receiver 254 is to respective institute
Receipt signal is adjusted (for example, filtering, amplification and down coversion), is digitized to provide sampling to the signal after adjusting,
And further sampling is processed to provide corresponding " receiving " symbol stream.
Subsequently, RX data processor 260 receives and is derived from NRThe N of individual receiver 254RIndividual receive symbol stream, and based on spy
Determine receiver treatment technology to come to NRThe individual symbol stream that received is processed to provide the ordinal number (rank of " detecting " symbol stream
number).Process that RX data processor 260 carried out is described in greater detail below.Each detection symbols stream includes this
The symbol of sample, this symbol is the estimation of the modulation symbol sending for corresponding data flow.Subsequently, RX data processor 260 is right
Each detection symbols stream carry out demodulating, deinterleaving and decoding, to recover the business datum of this data flow.By RX data processing
The place that the process of device 260 execution is executed with the TX MIMO processor 220 by transmitter system 210 and TX data processor 214
Reason is complementary.
Can using the channel response that generated by RX processor 260 estimate execute the spatial manipulation of receiver, sky/
When process, adjust power level, change modulation rate or scheme, or the other actions of execution.RX processor 260 can also be estimated
The signal of detection symbols stream and noise and interference ratio (SNR), and other characteristics of channel may be estimated, and this tittle is provided
To processor 270.
At receiver, it is possible to use various treatment technologies come to NRIndividual received signal is processed to detect NTIndividual institute
The symbol stream sending.These receiver treatment technologies can be grouped at two primary categories (i) spaces and space time receiver
Reason technology (it is also referred to as balancing technique)；And (ii) " continuous zero point/equilibrium and interference eliminate " receiver treatment technology (its
Referred to as " successive interference cancellation " or " successive elimination " receiver treatment technology).
By NTIndividual transmitting antenna and NRThe mimo channel that individual reception antenna is constituted can be decomposed into NSIndividual independent channel, wherein
NS≤min{NT,NR}.This NSEach in individual independent channel can also be referred to as this mimo channel spatial sub-channel (or transmission letter
Road), and correspond to a dimension.
Fig. 3 is an embodiment realizing the signal through Space Time Coding is carried out the transmitter system 300 of beam shaping
Simplification functional-block diagram.Fig. 3 simplify functional-block diagram be confined in this transmitter system with to after Space Time Coding
Signal carry out the related part of beam shaping.For purposes of brevity and clarity, other portions of this transmitter system are eliminated
Point.For example, transmitter system 300 can be integrated in the base station of the communication system of Fig. 1, and can be the transmitter system of Fig. 2
One embodiment of system.
Transmitter system 300 can be configured to, for all access terminals in its overlay area, realize to process
The signal of Space Time Coding carries out beam shaping.Alternatively, transmitter system 300 can be configured as in its overlay area
When there is multiple access terminal, realize carrying out multiple different beam shapings to the signal through Space Time Coding.For example, transmitter
Different weightings can be applied to antenna for each access terminal in its overlay area by system 300.In another embodiment
In, different weightings can be applied to antenna for the multiple access terminal groups in its overlay area by transmitter system 300,
Wherein each access terminal group can be a subset of the whole access terminals in its overlay area.
Transmitter system 300 includes transmitter 310, and this transmitter 310 is coupled to transmission diversity/space-time encoder 320.Send out
Send diversity/space-time encoder 320 that multiple coded signals are coupled to multiple beamforming encoder 3300-330G.Beam shaping
Encoder 3300-330GSignal through beam shaping is coupled to multiple antennas 34000-340GK.Timing and synchronization module 350
It is coupled to weight matrix generator 360, this weight matrix generator 360 is coupled to multiple beamforming encoder 3300-330G.
Transmitter 310 is configured to sampling is processed to generate modulated signal stream.For example, transmitter 310 is permissible
It is configured to generate multiple samplings of OFDM (OFDM) symbol according to multiple information bits.Transmitter 310 can be by
It is configured to information bit is mapped in the different sub carrier of described OFDM symbol, and according to predetermined modulation format by information
Bit modulation is on subcarrier.Transmitter 310 can be by OFDM symbol frequency transformation to desired RF tranmitting frequency.In this enforcement
The output of the transmitter 310 in example is the serial signal stream of the sampling of OFDM symbol in desired RF tranmitting frequency.
By the output coupling of transmitter 310 to time diversity/space-time encoder 320.Time diversity/space-time encoder 320
The signal stream being configured to spontaneous emission in future machine 310 is divided into multiple (G) signal stream.Time diversity/space-time encoder 320 is right
The plurality of signal stream is operated, to generate the revision of described signal stream.For example, time diversity/space-time encoder 320 can
There is no modified signal stream to be configured to straight-through one, and can be configured to change remaining G-1 letter
Number stream in each signal stream.Typically, since all signal streams can be normalized to signal specific stream it is possible to by one
Signal stream is considered unmodified.
For example, time diversity/space-time encoder 320 can be configured to each signal of this G-1 signal stream is flow to
Row postpones, negates, asking conjugation, rotation etc. or some of combination.Time diversity/space-time encoder 320 can be by using variable
Some combinations of delay, delay line, tapped delay line, digital delay etc. or delay element, introduce a delay into signal specific stream.
Time diversity/space-time encoder 320 can be configured with such as sign-changing amplifier that signal stream is negated.Time divides
Collection/space-time encoders 320 can be configured with such as rotator, be coupled to inverter of quadrature phase signal component etc. or
Some of combines, and seeks conjugation to this signal stream.In addition, time diversity/space-time encoder 320 can be configured with to homophase
The one or more multipliers being operated with quadrature signal component, one or more multiplication that phase component is weighted
Device, delay element etc. or some of combination, signal stream is rotated.
Generally, time diversity/space-time encoder 320 modification different to the execution of each signal stream, is enable to lead to
Cross and multiple (G) signal stream is sent on multiple (G) different antennae to realize sending diversity.In typical time diversity/sky
When coding system in, multiple (G) antenna can be spatially separated from.In the fig. 3 embodiment, to elapsed time diversity/sky
Between coding the different signal stream of G in each signal stream carry out other process.
The another way providing diversity gain at receiver is by using sending beam shaping, is sending beam shaping
In, substantially send identical information symbol from multiple antennas.The signal of each antenna in multiple antennas can be carried out
Different weightings is such that it is able to make the total signal to noise ratio at receiver maximum.Can be by using different antenna gains
Or to realize this different signal weighting by being weighted to the independent signal being coupled to each antenna.
In the fig. 3 embodiment, wave beam is individually carried out to each signal stream in G signal stream using multiple antennas
Shape.Each different signal stream from time diversity/space-time encoder 320 is coupled to multiple beamforming encoder
3300-330GOne of.Beamforming encoder 3300-330GNumber be equal to given birth to by time diversity/space-time encoder 320
The number of the transmission diversity signal stream becoming.
Each beamforming encoder (such as 3300) it is configurable to generate multiple weighted signal streams, wherein each weighting letter
Number stream is applied to corresponding antenna.Each beamforming encoder (such as 3300) receive from transmission diversity/Space Time Coding
One of multiple signal streams of device 320 signal stream.Beamforming encoder 3300Signal is divided into multiple (K) copy signal
Stream, and using associated beam shaping weighting, each signal stream in this K duplicate signal streams is weighted.Wave beam
Shape encoder 3300Weighted signal streams are coupled to and specific beam forming encoder 3300Associated plurality of (K) antenna
33000-3300K.
Therefore, the sum of antenna is multiplied by for each time diversity/sky equal to the number G of time diversity/Space Time Coding group
When code set generate beam-formed signal stream number K.In the fig. 3 embodiment, there is N=G × K antenna altogether.Right
In each time diversity/space-time signal, the transmitter system 300 of Fig. 3 is implemented to be illustrated the beam-formed signal of equal number
Stream.However, other embodiments can have different beamforming dimensions for different time diversities/space-time signal.
Weight matrix generator 360 is configurable to generate by each beamforming encoder 3300-330GUse weighting to
Amount.Each vector in weighting matrix can correspond to a beamforming encoder, and such as 3300.Generally, each weight to
Amount is different, it is not required that weighing vector is different.
Each weighting w in weighing vector can have amplitude A and the phase place of correlationWeight matrix generator 360
Fixed weighting matrix can be configurable to generate, or variable weight matrix can be configurable to generate.In certain embodiments,
Weight matrix generator 360 can be configurable to generate the combination of fixed weighting matrix and variable weight matrix.Weighting matrix is given birth to
Grow up to be a useful person and 360 can be configured to change weighting based on the combination of such as time, event or Time And Event.
If the estimation of the channel from transmitting antenna to receiver, weight matrix generator can be obtained at transmitter
360 optimums that can determine the weighting in each weighing vector, wherein this optimum make signal to noise ratio (SNR) maximum.However, it is logical
Often, transmitter system 300 does not know channel estimation, and does not also know channel estimation by this weight matrix generator 360.In order to true
Protect receiver and will continuously see diversity benefit, weight matrix generator 360 can be configured to change weighting in time, makes
The efficient channel obtaining in each wave beam also changes over, and wherein efficient channel includes the reality with reference to time-varying beam shaping effect
Channel.Change in the weighing vector being produced by weight matrix generator 360 introduces the beam shaping of change, this beam shaping mould
Intend fast-fading effect.
For exampleWeighing vector in, each weighting can include range weight and
Phase component, for example,Weight matrix generator 360 can be configured to come in many ways in vector weighting
The time change (temporal variation) that middle introducing is had a mind to.Weight matrix generator 360 can be configured to change width
Degree component, phase component or a combination thereof.In addition, weight matrix generator 360 can be configured to any give is changed independently
Weighting in weighing vector, or be based on or described weighting is changed according to one of described weighting.
As an example, weight matrix generator 360 can be configured to maintain the range weight being basically unchanged, and according to
The function of time is changing phase component.For example, weight matrix generator 360 can be according to the function phi of time0=φ0(t) and
φ1=φ1T () is changing the first and second phase components.Weight matrix generator 360 can be changed independently single weighting
Phase component, or the phase component of second phase component, for example, φ can be changed based on first phase component1(t)=φ0(t
+Δ).
As another example, weight matrix generator 360 can be configured to maintain the phase component being basically unchanged, and
Function according to the time to change the range weight of each weighting.For example, weight matrix generator 360 can keep φ0And φ1
Constant, and can be according to the function A of time0=A0(t) and A1=A1T () is changing the first and second range weights.Weighting square
Battle array maker 360 can be changed independently the range weight of single weighting, or can change second based on the first range weight
The range weight of range weight, for example, A1(t)=A0(t+Δ).In another embodiment, weight matrix generator 360 can be by
It is configured to change range weight and the phase component of the weighting of at least some beam shaping.
The speed that weight matrix generator 360 changes desired weighted components can be fixing or can change.Plus
Weight matrix maker 360 can be configured to change described component based on time, event or a combination thereof.Weight matrix generator
360 can be configured to use independent speed when changing multiple weighted components for the component that each changes.Alternatively
Or additionally, weight matrix generator 360 can be configured to use identical speed for each vector in weighting matrix
Or independent speed.Generally, weight matrix generator 360 can be configured to use for each component or speed and be completely independent
Function changing single weighted components and to change the speed that this weighting matrix is changed.
Weight matrix generator 360 can realize time change, and it is carried out according to the speed based on OFDM symbol speed
Update.For example, weight matrix generator 360 can change adding in weighting matrix in every frame of the OFDM symbol of predetermined number
Power.In other embodiments, weight matrix generator 360 can update weighting in each symbol period, or can be every
The section start of individual superframe updates weighting, and one of superframe includes multiple frames.
For example, weight matrix generator 360 can be configured to select the amplitude of each weighting and the time change of phase place
Speed, to mate used channel code.Therefore, weight matrix generator 360 changes over weighted components, and change plus
The speed of power depends on event, the selection of channel code.In another embodiment, weight matrix generator 360 can be configured to
According to the weighting w different from two1And w2Corresponding two different predefined function groups, carry out the when anaplasia of selecting range and phase place
The speed changed.In another embodiment, weight matrix generator 360 can be configured to select based on the feedback from receiver
Select function or rate of change.
Timing and synchronization module 350 be configured to by the timing of weight matrix generator with used in transmitter 310
Timing synchronizes.For example, regularly can include being synchronized to synchronization module 350 by transmitter 310 when generating transmission stream
The clock of the system time using.In one embodiment, regularly can be with the OFDM symbol timing sending stream with synchronization module
So that weight matrix generator 360 can generate time-variant weights, this time-variant weights changes on character boundary for synchronization.
Timing and synchronization module 350 can also be monitored generation in transmitter 310 and be used for making by weight matrix generator 360
For changing one or more events of the trigger condition of weighting.For example, regularly transmitter 310 can be monitored with synchronization module 350
The code rate being used, and can generate for indicating code rate or instruction coding speed for weight matrix generator 360
The designator of the change in rate or message.
Fig. 4 is the simplification function box of an embodiment of the transmitter system 300 being arranged to carry out beam shaping
Figure.In the fig. 4 embodiment, transmitter system 300 is configured with total of four antenna, and is configured in two different groups
Middle generation sends diversity/Space Time Coding.The enforcement of Fig. 4 is illustrated the specific embodiment of General System shown in figure 3.
In the fig. 4 embodiment, transmitter 310 is configurable to generate transmission stream, and for example, this transmission stream can be by frequency
Transform to the stream of multiple OFDM symbol of RF tranmitting frequency.This transmission stream is coupled to transmission diversity/Space Time Coding by transmitter 310
Device 320.
Send diversity/space-time encoder 320 to be configured to generate one by two encoded according to input transmission stream
Send the group that stream is constituted.For example, sending diversity/space-time encoder 320 and input being sent flow point is two essentially identical pairs
This.Send diversity/space-time encoder 320 and can export in two essentially identical copies first as first encoded
Send stream, and can second in two essentially identical copies of output as second encoded send before stream to this
Two copies are further processed.Sending diversity/space-time encoder 320 can be by for example carrying out postponing to signal stream, asking
It is conjugated, negates, rotating etc. or some of combination, second come in the copy essentially identical to two is processed.
Transmitter system 300 is carried out to each of one group of signal stream through sending diversity/Space Time Coding signal stream
Beam shaping.First group of antenna includes antenna 34000With 34001, and second group of antenna includes antenna 34010With 34011.Transmitter
System 300 uses first group of antenna 34000With 34001To enter traveling wave to through sending the first signal stream after diversity/Space Time Coding
Beam shaping, and use second group of antenna 34010With 34011To flow to through sending the secondary signal after diversity/Space Time Coding
Traveling wave beam shaping.
Send diversity/space-time encoder 320 and the first encoded stream that sends is coupled to the first beamforming encoder 3300.
Described first beamforming encoder 3300Including demultiplexer 4100, this demultiplexer 4100It is configured to by first
It is two essentially identical copies that coding sends flow point.First beamforming encoder 3300Will be from separator 4100First
Output coupling is to the first antenna 340 being associated with transmission diversity group00.First beamforming encoder 3300Will be from separator
4100The second output coupling to multiplier 4200, wherein this multiplier 4200It is configured to, with from weight matrix generator 360
The complex weighting receiving signal stream is weighted.First beamforming encoder 3300The transmission being weighted stream is coupled to
The second antenna 340 being associated with transmission diversity group01.
Transmitter system 300 flows to traveling wave beam shaping to the second encoded transmission in a similar manner.Send diversity/space-time
The second encoded stream that sends is coupled to the second beamforming encoder 330 by encoder 3201.Second beamforming encoder 3301
Including demultiplexer 4101, this demultiplexer 4101Being configured to will be basic for two for the described second encoded transmission flow point
Identical copy.Second beamforming encoder 3301Will be from separator 4101The first output coupling to first antenna
34010.Second beamforming encoder 3301Will be from separator 4101The second output coupling to multiplier 4201, wherein this is taken advantage of
Musical instruments used in a Buddhist or Taoist mass 4201The complex weighting being configured to, with receiving from weight matrix generator 360 signal stream is weighted.Second ripple
Beam shaping encoder 3301The transmission being weighted stream is coupled to the second antenna 34011.
Timing and synchronization module 350 are configured to generating, with transmitter 310, the system time synchronization using during transmission stream.
Timing and synchronization module 350 can be additionally configured to monitor the state of scheduled event or transmitter 310.Timing and synchronization module
Timing and state information of event are coupled to weight matrix generator 360 by 350.
Because carrying out beam shaping, weight matrix generator in each transmission diversity group of two different antenna pairs
360 are illustrated as 2 × 2 weight matrix generator.Under normal conditions, weight matrix generator 360 is directed to two transmission diversity
Each group of generation 1 × 2 vector in group, thus obtain 2 × 2 weighting matrixs.However, because beamforming encoder 3300With
3301Only it is weighted to being routed to one of two signals of antenna, so weight matrix generator 360 only needs for every
Individual transmission diversity group generates a complex weighting.
Weight matrix generator 360 sends diversity group for each and efficiently generates 1 × 2 vector, and wherein Section 1 is by advance
It is set to unit 1.Therefore, diversity group is sent for each, there is the variable complex weighting of only one.This weighting may be considered is returned
One changes to the first weighting.
Fig. 5 is the simplification providing the method 500 sending diversity using the transmission diversity/Space Time Coding through beam shaping
Flow chart.For example, method 500 can execute or the transmitter system execution shown in Fig. 3 or 4 in the base station of Fig. 1.Go out
In the purpose discussing, method 500 is described as being executed by transmitter system.
Method 500 starts at square frame 510, and in square frame 510, transmitter system generates and sends stream.For example, transmitter system
System can generate the transmission stream of the OFDM symbol being frequency translated to desired RF operating frequency.Transmitter system proceeds to
Square frame 520, and flow point will be sent for G group, wherein G represents the integer more than 1.As an example, transmitter system can be by
Being configured so that separator will send flow point is G group.
Transmitter system proceeds to square frame 530, and carries out time diversity/Space Time Coding to G signal stream.Can be to G
One or more of individual signal stream is processed to be flowed with sending diversity and introduce to send.In one embodiment, transmitter system
System can be configured to signal stream is carried out to postpone, seek conjugation, negate, rotate or other process to signal stream
Reason or modification.In addition, when introducing transmit diversity, transmitter system can realize the combination of multiple treatment technologies.
After introducing transmit diversity, transmitter system proceeds to square frame 540, and will be every in G encoded signal stream
Individual encoded sending signal is divided into the group being made up of K signal.For example, transmitter system can be configured with 1:K signal
Each encoded transmission flow point is K signal by separator.Therefore, each signal stream in G signal stream is being carried out point
After cutting, transmitter system is configured to support N=G × K signal.
Clear and simple in order to describe, method 500 is described as each signal stream in G signal stream is divided into by K
The group that signal is constituted.However, method 500 is not limited to the antenna in each group with equal number.Therefore, replacing enforcement
In example, each signal in the first subset of signal stream can be divided into the group being made up of K1 signal by transmitter system, and incite somebody to action
Each signal in secondary signal subset is divided into the group being made up of K2 signal, and wherein K1 is not equal to K2.In another embodiment,
Each signal stream in G signal stream can be divided into different number of subflow by transmitter system.
Once each signal stream in G signal stream is divided into one group of subflow by transmitter system, then transmitter system is carried out
Generate weighing vector to square frame 550 and for every group in G group.In flow charts in shown embodiment, transmitter system is given birth to
Become the weighing vector that G length is K.Transmitter system can be the different weighing vector of every group of generation in G group, or transmitting
Machine system can use identical weighing vector to multiple groups.Each of weighing vector represents for by K signal stream
The group constituting carries out the weighting of beam shaping.
Transmitter system can be configurable to generate the weighing vector of static state or dynamically change weighing vector, or quiet
State and the combination of dynamic weight vectors.Transmitter system can be configured to the combination based on time, event or Time And Event
To change beamforming weight vector.For example, time change speed can be based on OFDM symbol speed, frame rate, super frame rate
Or some other speed changing over.
Transmitter system can not need to change in an open-loop manner in the case of the feedback of receiver one or
Multiple dynamic beam orming weighting vector；Or based on the direct or indirect feedback from one or more receivers with closed loop side
Formula is changing one or more dynamic beam orming weighting vector.For example, transmitter system can be based on channel speed, coding class
Type or some other parameters that can be directly or indirectly affected by receiver to change beamforming weight vector.For example,
Transmitter system can be based in part on selected channel code to change one or more weighing vectors.
Transmitter system proceeds to square frame 560, and based on associated weighing vector, comes to the K in every group in G group
Each signal stream in individual signal stream is weighted.Transmitter system proceeds to square frame 570, and on N=G × K antenna
Sending signal.The G signal stream that each group being made up of K antenna sends free elapsed time diversity/Space Time Coding is constituted
Group in corresponding signal stream the expression through beam shaping.Transmitter system can be held continuing with the information of all transmissions
Row method 500, or can be configured to optionally activate or deexcitation beam shaping.
Fig. 6 is the simplification function box of an embodiment of the transmitter system 600 being arranged to carry out beam shaping
Figure.Transmitter system 600 includes one or more processors 610 for generating, and it is configured to generate and sends stream.For example, one
Individual or multiple processors 610 for generating can include signal source, manipulator, frequency changer etc..In one embodiment,
One or more transmissions being configurable to generate the OFDM symbol being frequency translated to transmission frequency for the processor 610 generating
Stream.
One or more for generate processors 610 by send stream be coupled to one or more for sending diversity/sky
When the processor 620 that encodes.One or more processors 620 for sending diversity/Space Time Coding are configured to according to input
Send stream and generate multiple (G) through sending the signal stream of diversity/Space Time Coding.One or more for sending diversity/space-time
The processor 620 of coding sends stream according to input and generates multiple signal streams, and each in this G signal stream is encoded,
Send diversity to introduce.
For example, one or more processors 620 for sending diversity/Space Time Coding can include one or more units
Part, it is configured to signal stream be carried out postpone, seeks conjugation, negate, rotate or other process.
One or more processors 620 for sending diversity/Space Time Coding will be each in multiple encoded transmission streams
Individual it is coupled to corresponding multiple one or more processors 630 for beam shaping0-630G.Transmitter system 600 is independent
Ground flows to traveling wave beam shaping to each encoded transmission, and therefore realizes one or more use for each encoded transmission stream
In the processor of beam shaping, such as 6300.
Each is used for the processor (for example, 630 of beam shaping0) by its corresponding encoded transmission flow point be multiple by K
The group that individual beam shaping subflow is constituted.One or more processors (such as 630 for beam shaping0) utilize by for generating
Weighting in the corresponding beamforming weight vector that the module 660 of weighting matrix provides, K beam shaping subflow is carried out to add
Power.
One or more processors (for example, 630 for beam shaping0) beam shaping subflow that K is weighted
It is coupled to multiple corresponding antennas, such as 64000-6400K, wherein on these antenna, the signal through beam shaping is sent
To one or more receivers.
One or more processors 660 for generating weighting matrix are one or more processors for beam shaping
6300-630GEach of generate weighing vector.Generally, one or more processors 660 for generating weighting matrix are directed to
Each antenna generates a weighting, and is thus each or multiple processor 630 for beam shaping0-630GGenerate dimension
Vector for K.One or more processors 660 for generating weighting matrix can for each be used for beam shaping module
6300-630GGenerate different weighing vectors, or identical weighing vector can be supplied to two or more and be used for wave beam
The module of shape.
One or more processors 660 for generating weighting matrix can be configurable to generate fixing weighing vector or
Variable weighing vector.One or more processors 660 for generating weighting matrix can change in variable weighting vector
Each weighting, or a subset of the weighting in variable weighting vector can be changed.
One or more processors 660 for generating weighting matrix can be based on event or based on event and time
Combine and to change over weighing vector.One or more processors 650 for timing and synchronization can be configured to be directed to
One or more monitor the generations of event for the processors 610 generating or do not have that event occurs, and can be configured to by
Time synchronizes with by one or more time references using for the processor 610 generating.For example, one or more use
Can be configured to synchronous with system time or symbol time in timing and synchronous processor 650.
The information related to event and Timing Synchronization is coupled to by one or more processors 650 for timing and synchronization
For generating the module 660 of weighting matrix.As a example one or more processors 660 for generating weighting matrix can be configured
As changed one or more weighing vectors, wherein said predetermined letter using the combination of predefined function, form or function and form
Number, form are related to the information being provided by one or more processors 650 for timing and synchronization.
Using methods and apparatus described herein, communication system is become with wave beam from transmission diversity/Space Time Coding
Be benefited in both shapes.Transmitter system can be operated with to every in one group of signal through sending diversity/Space Time Coding
Individual signal individually carries out beam shaping.Transmitter system can change to described one group through sending diversity/Space Time Coding
The beam shaping that each encoded signal stream in signal is carried out.Transmitter system can change over and each signal is flow to
The beam shaping of row.Transmitter system can change beam shaping according to open loop approach, at described open loop approach and receiver
The characteristic of channel or signal quality unrelated.
As it is used herein, term " coupling " or " connection " are used to represent INDIRECT COUPLING and direct-coupling or company
Connect.In the case of the two or more squares of coupling, module, device, can deposit between the square of this two couplings
In one or more middle squares.
Can be using with bottom in conjunction with the various illustrative logical blocks of presently disclosed embodiment description, module and circuit
Part is realizing or to execute：General processor, digital signal processor (DSP), Reduced Instruction Set Computer (RISC) processor, specially
Patrolled with integrated circuit (ASIC), field programmable gate array (FPGA) or other PLD, discrete gate or transistor
Volume, discrete hardware components or be designed to execute the combination in any of the above-mentioned part of function described herein.General processor can
To be microprocessor, but alternatively, this processor can be any processor, controller, microcontroller or state machine.Place
Reason device can also be embodied as the combination of computing device, the combination of such as DSP and microprocessor, multi-microprocessor, one or many
Individual microprocessor combines DSP core or any other this configuration.
Method described in one or more exemplary embodiments, process or algorithm can adopt hardware, software, firmware
Or its any combinations is realizing.When implemented in software, these functions can be stored in calculating as one or more instructions
Transmit on machine computer-readable recording medium or by computer-readable medium.Computer-readable medium includes computer-readable storage medium and leads to
Letter medium, this communication media includes being easy to computer program is sent to any medium of another location from a position.Storage
Medium can be any usable medium that can be accessed by computer.For example, but without limitation, this computer-readable
Medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc memory apparatus, disk storage equipment or other magnetic and deposit
Storage equipment or can be used in carries or the required program code of store instruction or data structure form being entered by computer
Any other medium that row accesses.Additionally, any connection is also properly termed computer-readable medium.For example, if used
Coaxial cable, optical fiber cable, the wireless technology of twisted-pair feeder, digital subscriber line (DSL) or such as infrared ray, radio and microwave
To send software from website, server or other remote source, then above-mentioned coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as
The wireless technology of infrared ray, radio and microwave is included in the definition of transmission medium.As used herein, disk and light
Disk includes compact disk (CD), laser disk, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, the wherein usual magnetic of disk
Property ground reproduce data, and CD utilize laser optics ground reproduce data.Combinations thereof also should include in computer-readable medium
In the range of.
The above description of disclosed embodiment is used for enabling those skilled in the art to manufacture or using the disclosure.For this
For skilled person, the various modifications to these embodiments are it will be apparent that and in the spirit without departing substantially from the disclosure
Or in the case of scope, the rule defining here can apply to other embodiments.Therefore, the disclosure is not intended to be limited to
Each embodiment of shown here, but should comply with the wide model consistent with principles disclosed herein and novel feature
Enclose.
Claims (23)
1. a kind of transmitter, including：
Maker, it is configurable to generate sending signal stream；
Send diversity encoder, it is configured to receive described sending signal stream, and is configured to according to described sending signal
Stream carrys out multiple transmission streams through sending diversity/Space Time Coding that generation quantity is G；
Timing and synchronization module, it is configurable to generate timing base；
Weight matrix generator, it is configurable to generate multiple weighing vectors, and the plurality of weighing vector includes at least one change
The weighing vector changed, wherein, described weight matrix generator is configured with described timing base come described in changing at least one
The weighing vector of individual change；And
Multiple beamforming encoder, each beamforming encoder in the plurality of beamforming encoder is configured to connect
One of the plurality of transmission stream through sending diversity/Space Time Coding of receipts sends stream, and adds by using the plurality of
Corresponding weighing vector in weight vector is to the plurality of one passing through in the transmission stream sending diversity/Space Time Coding
Send stream to be weighted, come according to the plurality of one transmission stream life sending in stream through sending diversity/Space Time Coding
Become multiple subflows being weighted that quantity is K, wherein, each in the plurality of subflow being weighted is weighted
Subflow is configured to the subflow being weighted independent of each other in the plurality of subflow being weighted, and comes same with quantity
Couple for the respective antenna phase in multiple antennas of K.
2. transmitter as claimed in claim 1, wherein, described at least one change weighing vector include time-variant weights to
Amount.
3. transmitter as claimed in claim 1, wherein, the weighing vector of at least one change described is included based on transmitter thing
The weighing vector that part determines.
4. transmitter as claimed in claim 1, wherein, described weight matrix generator is configurable to generate at least one and is added with
Weight vector.
5. transmitter as claimed in claim 1, wherein, described weight matrix generator is configured to for multiple access terminals
In each access terminal generate different complex weight vector.
6. transmitter as claimed in claim 1, wherein, at least one of the plurality of beamforming encoder beam shaping
Encoder is configured to for the encoded transmission stream being received to be divided into K subflow, and using the element in complex weight vector
At least one of described K subflow subflow is weighted.
7. transmitter as claimed in claim 1, wherein, the described stream that sends includes being frequency translated to the orthogonal frequency of operating frequency
Divide multiplexing (OFDM) symbol.
8. transmitter as claimed in claim 1, wherein, the described diversity encoder that sends is configured to send the one of stream to described
Individual version is postponed, and is used as at least a portion for generating the process sending stream through sending diversity/Space Time Coding.
9. transmitter as claimed in claim 1, wherein, the described diversity encoder that sends is configured to send the one of stream to described
Individual version seeks conjugation, is used as at least a portion for generating the process sending stream through sending diversity/Space Time Coding.
10. transmitter as claimed in claim 1, wherein, the described diversity encoder that sends is configured to described transmission stream
One version is rotated, and is used as generating at least that sends the process flowing through sending diversity/Space Time Coding
Point.
11. transmitters as claimed in claim 1, wherein, described timing and synchronization module are configured to for one or more
Event is monitored described maker；And the generation based on one or more of events or do not have to generate
State timing base.
A kind of 12. methods introducing transmission diversity, methods described includes：
Generate sending signal stream；
By sending diversity encoder, diversity/space-time is sent come multiple process that generation quantity is G according to described sending signal stream
The transmission stream of coding；
Generate timing base；
Generate multiple weighing vectors, the plurality of weighing vector include at least one change weighing vector, wherein, described at least
The weighing vector of one change is changed using described timing base；
By using the corresponding weighing vector in the plurality of weighing vector to the plurality of through sending diversity/Space Time Coding
Send stream in each send stream be weighted, come according to the plurality of through transmission diversity/Space Time Coding transmission stream in
Described each send stream to the plurality of through transmission diversity/Space Time Coding send stream in described in each send stream carry out
Beam shaping, with multiple subflows being weighted for K for the generation quantity, wherein, in the plurality of subflow being weighted
The subflow that each is weighted is configured to be weighted independent of each other in the plurality of subflow being weighted
Subflow, the respective antenna phase to be all in multiple antennas of K with quantity is coupled；And
Send the subflow that each is weighted.
13. methods as claimed in claim 12, wherein, are transmitted diversity/Space Time Coding to described G signal stream and include：
With respect to the first signal stream in described G signal stream, at least one of described G signal stream signal stream time of carrying out is prolonged
Late.
14. methods as claimed in claim 12, wherein, are transmitted diversity/Space Time Coding to described G signal stream and include：
With respect to the first signal stream in described G signal stream, conjugation is asked at least one of described G signal stream signal stream.
15. methods as claimed in claim 12, wherein, are transmitted diversity/Space Time Coding to described G signal stream and include：
With respect to the first signal stream in described G signal stream, at least one of described G signal stream signal stream is rotated.
16. methods as claimed in claim 12, wherein, the weighing vector of described change include predetermined time-varying beam shaping to
Amount.
17. methods as claimed in claim 12, wherein, each subflow in described K subflow is weighted including：By son
Stream is multiplied with the complex weighting in corresponding weighing vector.
18. methods as claimed in claim 12, also include：
Monitor the generation of one or more events, wherein, described timing base is the generation based on one or more of events
Or not generating.
A kind of 19. transmitters, including：
For generating the unit of sending signal stream；
For the multiple transmission streams through sending diversity/Space Time Coding being G come generation quantity according to described sending signal stream
Unit；
For generating the unit of timing base；
For generating the unit of multiple weighing vectors, the plurality of weighing vector includes the weighing vector of at least one change, its
In, the described unit for generating the plurality of weighing vector is included for described in being changed using described timing base at least one
The unit of the weighing vector of individual change；
For diversity/space-time being sent to the plurality of process by using the corresponding weighing vector in the plurality of weighing vector
Each transmission stream sending in stream of coding is weighted, and comes according to the plurality of transmission through sending diversity/Space Time Coding
Each transmission stream described in during the plurality of transmission through sending diversity/Space Time Coding is flowed is flowed in each transmission described in stream
Carry out beam shaping, with the unit of multiple subflows being weighted for K for the generation quantity, wherein, the plurality of be weighted
Subflow in each subflow being weighted be configured to other independent of each in the plurality of subflow being weighted
The subflow being weighted, the respective antenna phase to be all in multiple antennas of K with quantity is coupled；And
For sending the multiple of the subflow that each is weighted, that is, K, antenna.
20. transmitters as claimed in claim 19, wherein, described compile for being transmitted diversity/space-time to described transmission stream
The unit of code includes：Be configured to according to described send stream generate through delay, seek conjugation, rotate or negate after signal stream in
The element of at least one.
21. transmitters as claimed in claim 19, wherein, the described unit for generating timing base includes：
For the list the described unit for generating sending signal stream is monitored for one or more events
Unit；And
For the generation based on one or more of events or do not have to generate the unit of described timing base.
A kind of 22. non-transitory computer-readable medium, include instructing thereon, and described instruction is configured such that equipment provides and sends out
Send diversity, described instruction includes：
For generating the instruction of sending signal stream；
For the multiple transmission streams through sending diversity/Space Time Coding being G come generation quantity according to described sending signal stream
Instruction；
For generating the instruction of timing base；
For generating the instruction of multiple weighing vectors, the plurality of weighing vector includes the weighing vector of at least one change, its
In, the described instruction for generating the plurality of weighing vector is included for described in being changed using described timing base at least one
The instruction of the weighing vector of individual change；
For diversity/space-time being sent to the plurality of process by using the corresponding weighing vector in the plurality of weighing vector
Each transmission stream sending in stream of coding is weighted, and comes according to the plurality of transmission through sending diversity/Space Time Coding
Each transmission stream described in during the plurality of transmission through sending diversity/Space Time Coding is flowed is flowed in each transmission described in stream
Carry out beam shaping, with the instruction of multiple subflows being weighted for K for the generation quantity, wherein, the plurality of be weighted
Subflow in each subflow being weighted be configured to other independent of each in the plurality of subflow being weighted
The subflow being weighted, the respective antenna phase to be all in multiple antennas of K with quantity is coupled；And
For sending the instruction of the subflow that each is weighted.
23. non-transitory computer-readable medium as claimed in claim 22, wherein, the described finger for generating timing base
Order includes：
For monitoring the instruction of the generation of one or more events；And
For the generation based on one or more of events or do not have to generate the instruction of described timing base.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87065306P | 2006-12-19 | 2006-12-19 | |
| US60/870,653 | 2006-12-19 | ||
| US11/684,527 | 2007-03-09 | ||
| US11/684,527 US9106296B2 (en) | 2006-12-19 | 2007-03-09 | Beam space time coding and transmit diversity |
| CNA2007800474152A CN101563861A (en) | 2006-12-19 | 2007-12-18 | Beam space time coding and transmit diversity |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800474152A Division CN101563861A (en) | 2006-12-19 | 2007-12-18 | Beam space time coding and transmit diversity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106411382A true CN106411382A (en) | 2017-02-15 |
Family
ID=41221598
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611168966.1A Pending CN106411382A (en) | 2006-12-19 | 2007-12-18 | Beam space time coding and transmit diversity |
| CNA2007800474152A Pending CN101563861A (en) | 2006-12-19 | 2007-12-18 | Beam space time coding and transmit diversity |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800474152A Pending CN101563861A (en) | 2006-12-19 | 2007-12-18 | Beam space time coding and transmit diversity |
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| UA (1) | UA94638C2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733592B (en) | 2016-08-10 | 2020-11-27 | 华为技术有限公司 | Transmission scheme indication method, data transmission method, device and system |
| CN107733492B (en) * | 2016-08-10 | 2020-09-04 | 华为技术有限公司 | Data transmitting and receiving method and device |
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|---|---|---|---|---|
| EP1229669A1 (en) * | 2001-02-01 | 2002-08-07 | Fujitsu Limited | Communications systems |
| US20030026348A1 (en) * | 2001-06-07 | 2003-02-06 | National University Of Singapore | Wireless communication apparatus and method |
| CN1574686A (en) * | 2003-05-16 | 2005-02-02 | 三星电子株式会社 | Apparatus and method for mode transition of a transmit diversity scheme in a mobile communication system |
| CN1585296A (en) * | 2003-08-18 | 2005-02-23 | 阿尔卡特公司 | Combined open and closed loop transmission diversity system |
| CN1710825A (en) * | 2005-07-06 | 2005-12-21 | 哈尔滨工业大学 | Intelligent antenna downstream wave-packet formation method combined with space hour block coding |
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2007
- 2007-12-18 CN CN201611168966.1A patent/CN106411382A/en active Pending
- 2007-12-18 UA UAA200907544A patent/UA94638C2/en unknown
- 2007-12-18 CN CNA2007800474152A patent/CN101563861A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1229669A1 (en) * | 2001-02-01 | 2002-08-07 | Fujitsu Limited | Communications systems |
| US20030026348A1 (en) * | 2001-06-07 | 2003-02-06 | National University Of Singapore | Wireless communication apparatus and method |
| CN1574686A (en) * | 2003-05-16 | 2005-02-02 | 三星电子株式会社 | Apparatus and method for mode transition of a transmit diversity scheme in a mobile communication system |
| CN1585296A (en) * | 2003-08-18 | 2005-02-23 | 阿尔卡特公司 | Combined open and closed loop transmission diversity system |
| CN1710825A (en) * | 2005-07-06 | 2005-12-21 | 哈尔滨工业大学 | Intelligent antenna downstream wave-packet formation method combined with space hour block coding |
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| Publication number | Publication date |
|---|---|
| UA94638C2 (en) | 2011-05-25 |
| CN101563861A (en) | 2009-10-21 |
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