CN106797628B - Double-current launching technique and transmitter - Google Patents
Double-current launching technique and transmitter Download PDFInfo
- Publication number
- CN106797628B CN106797628B CN201480081496.8A CN201480081496A CN106797628B CN 106797628 B CN106797628 B CN 106797628B CN 201480081496 A CN201480081496 A CN 201480081496A CN 106797628 B CN106797628 B CN 106797628B
- Authority
- CN
- China
- Prior art keywords
- data flow
- symbol
- transmitter
- launching beam
- launching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
The present invention provides a kind of double-current launching technique and transmitter, can on single radio-frequency channel simultaneous transmission two stream.This method comprises: transmitter modulates the first data flow and the second data flow respectively, the number for the symbol for including in the set of the symbol composition generated after being modulated to the first data flow；According to the corresponding relationship of pre-set symbol and launching beam, launching beam corresponding with the modulated symbol of the first data flow is selected；It uses in such a way that the launching beam of selection represents the modulated symbol of the first data flow, emit the modulated symbol of the first data flow to receiver by the launching beam of selection, and use in a manner of the launching beam carrying modulated symbol of the second data flow selected, the modulated symbol of the second data flow is emitted to receiver by the launching beam of selection.
Description
Technical field
The present invention relates to the communication technology more particularly to a kind of double-current launching technique and transmitters.
Background technique
Multiple-input and multiple-output (Multiple-Input Multiple-Output, abbreviation MIMO) technology can be mentioned effectively
System performance is risen, has gained universal acceptance and has been widely applied.According to MIMO principle, biography can be promoted by increasing number of antennas
Defeated capacity.But in small device especially terminal, due to limited space, number of antennas cannot arbitrarily increase, from being unable to
Achieve the purpose that hoist capacity by increasing number of antennas as base station.
Spatial modulation (Spatial Modulation) technology can transmit multiple data flows by mutiple antennas, that is,
Multiple transmitting data streams are transmitted by way of increasing multiple radio-frequency channels.However, although space-modulation technique can reduce hair
Power is penetrated, but transmitter is required to have compared with multiple antennas, is not suitable for small device.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the present invention proposes a kind of double-current launching technique and transmitter, can be in list
Simultaneous transmission two stream on radio-frequency channel.
A kind of double-current launching technique of first aspect, the embodiment of the present invention, comprising:
Transmitter modulates the first data flow and the second data flow respectively, generates after being modulated to first data flow
The number for the symbol for including in the set of symbol composition, equal to the pre-set launching beam in single radio-frequency channel of the transmitter
Sum；
The transmitter selects and first data flow according to the corresponding relationship of pre-set symbol and launching beam
The corresponding launching beam of modulated symbol；
The transmitter uses in such a way that the launching beam of selection represents the modulated symbol of the first data flow, passes through
The selected launching beam emits the modulated symbol of the first data flow to receiver, and uses with the selected hair
The modulated symbol mode of the second data flow of beams carry is penetrated, by the selected launching beam to receiver transmitting the
The modulated symbol of two data flows；Wherein, the selected launching beam is corresponding with the modulated symbol of the first data flow
Launching beam.
With reference to first aspect, in the first possible embodiment, the above method further include:
The transmitter sends N number of pilot signal p to the receiver respectively with different form of beamsi, the reception
Machine estimates each pilot signal piCorresponding channel Hi, wherein i ∈ 1 ..., N；The N is in single radio-frequency channel
The total number of launching beam；
The transmitter determines that the pilot signal of the 1st preferred emission beam transmission isWherein,Meet following item
Part:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel；
The transmitter determines m-th of preferred emission beam transmission pilot signalWherein,M ∈ 2 ..., M, H 'iIndicate HiTransposition conjugation, J representative be selected
The serial number of the corresponding channel of pilot signal that is emitted of launching beam, I represents what the launching beam not being selected was emitted
The serial number of the corresponding channel of pilot signal, α and β are respectively weighting coefficient, and M is the preferred emission wave beam in single radio-frequency channel
Total number.
With reference to first aspect, alternatively, the first possible implementation with reference to first aspect, in second of possible reality
It applies in mode, the modulated symbol of the second data flow is emitted by the selected launching beam, comprising:
By the selected launching beam, emit the second number according to the carrier way that protection interval is not added before data
According to the modulated symbol of stream.
With reference to first aspect, alternatively, the first possible implementation with reference to first aspect, in the third possible reality
It applies in mode, the modulated symbol of the second data flow is emitted by the selected launching beam, comprising:
By the selected launching beam, emit the modulated symbol of the second data flow according to single carrier frequency domain equalization mode
Number.
With reference to first aspect, alternatively, the first possible implementation with reference to first aspect, in the 4th kind of possible reality
It applies in mode, the modulated symbol of the second data flow is emitted by the selected launching beam, comprising:
By the selected launching beam, after emitting the modulation of the second data flow according to multi-carrier OFDM mode
Symbol.
Second aspect, the embodiment of the present invention provide a kind of transmitter, comprising:
Modulator, for modulating the first data flow and the second data flow respectively, after being modulated to first data flow
The number for the symbol for including in the set of the symbol composition of generation, it is pre-set excellent equal to single radio-frequency channel of the transmitter
Select the sum of launching beam；
Processor, for the corresponding relationship according to pre-set symbol and launching beam, selection and first data
Flow the corresponding launching beam of modulated symbol；
Transmitter leads to for using the launching beam to select to represent in a manner of the modulated symbol of the first data flow
It crosses the selected launching beam and emits the modulated symbol of the first data flow to receiver, and use with selected
Launching beam carries the modulated symbol mode of the second data flow, is emitted by the selected launching beam to the receiver
The modulated symbol of second data flow；Wherein, the selected launching beam is corresponding with the modulated symbol of the first data flow
Launching beam.
In conjunction with second aspect: in the first possible embodiment, the transmitter is also used to different wave beam shapes
Formula sends N number of pilot signal p to the receiver respectivelyi, each pilot signal p of the receiver estimationiCorresponding channel
Hi, wherein i ∈ 1 ..., N；The N is the total number of the launching beam in single radio-frequency channel；
The processor is also used to determine that the pilot signal of the 1st preferred emission beam transmission isWherein,Meet
Following condition:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel；
The processor is also used to determine m-th of preferred emission beam transmission pilot signalWherein,M ∈ 2 ..., M, H 'iIndicate HiTransposition conjugation, J representative be selected
The serial number of the corresponding channel of pilot signal that is emitted of launching beam, I represents what the launching beam not being selected was emitted
The serial number of the corresponding channel of pilot signal, α and β are respectively weighting coefficient, and M is the preferred emission wave beam in single radio-frequency channel
Total number.
In conjunction with second aspect, or the first possible embodiment of second aspect is combined, or it can embodiment at second
In, the transmitter is also used to through the selected launching beam, according to the single carrier side that protection interval is not added before data
Formula emits the modulated symbol of the second data flow.
In conjunction with second aspect, or combine the first possible embodiment of second aspect, the third or can embodiment
In, the transmitter is also used to through the selected launching beam, emits the second data according to single carrier frequency domain equalization mode
Flow modulated symbol.
In conjunction with second aspect, or the first possible embodiment of second aspect is combined, or it can embodiment at the 4th kind
In, the transmitter is also used to through the selected launching beam, emits second according to multi-carrier OFDM mode
The modulated symbol of data flow.
For the antenna with injection channel, the embodiment of the present invention is utilized the launching beam of antenna, is represented with launching beam
The modulated symbol of first data flow is transmitted to receiver by the modulated symbol mode of the first data flow, by currently emitting
The mode of the launching beam carrying modulated symbol of the second data flow of the symbol of one data flow, the second data flow is modulated
Symbol is transmitted to receiver, utilizes same wave beam to realize in synchronization while emitting the modulated symbol of two data streams
Number purpose, and then realize in synchronization, using multiple launching beams of single radio-frequency channel, while emitting two data streams
Purpose, reduce the antenna number of transmitter, the purpose of hoist capacity met in the case where limited space.
Detailed description of the invention
Fig. 1 is a kind of double-current launching technique flow chart provided in an embodiment of the present invention；
Fig. 2 is the transmitting scene figure of Fig. 1；
Fig. 3 is a kind of transmitter architecture schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Transmitter in the embodiment of the present invention can be network side equipment, for example, base station, is also possible to user side equipment,
Such as terminal.
Fig. 1 is a kind of double-current launching technique flow chart provided in an embodiment of the present invention.As shown in Figure 1, the present embodiment provides
Method include:
Step 11: transmitter modulates the first data flow and the second data flow respectively, raw after being modulated to the first data flow
At symbol composition set in include symbol number, equal to the pre-set preferred hair of single radio-frequency channel of transmitter
The sum of ejected wave beam.
Transmitter described in the embodiment of the present invention may include an antenna, and it is single which, which has a radio-frequency channel,
Radio-frequency channel.Single radio-frequency channel can have multiple launching beams by configuration.For the optimum performance for obtaining antenna, transmitter exists
Before emitting data flow, M preferred emission wave beam can be selected from all launching beams in advance.In addition, transmitter needs pre-
The modulation system of each data flow is first set.First data flow and the second data flow can use identical modulation system, can also
To use different modulation systems.Modulation system can be phase-shift keying (PSK) (Phase Shift Keying, abbreviation PSK) modulation,
For example, two-phase phase-shift keying (PSK) (Binary Phase Shift Keying, abbreviation BPSK) modulation or four phase shift keying
(Quadrature Phase Shift Keying, abbreviation QPSK) modulation, is also possible to quadrature amplitude modulation (Quadrature
Amplitude Modulation, abbreviation QAM) modulation.The set of the symbol composition generated after being modulated to the first data flow
In include symbol number, equal to the number of the pre-set launching beam of transmitter.After being modulated to the second data flow
The number for the symbol for including in the set of the symbol composition of generation, can with the first data flow is modulated after the symbol that generates
The number for the symbol for including in the set of composition is identical, can not also be identical.
For example, the collection for the symbol composition that the first data flow generates after ovennodulation is combined intoFrom
The preferred emission wave beam that all launching beams of single radio-frequency channel are selected is B={ B1, B2..., BM, the second data flow S2Through
The collection of the symbol composition generated after ovennodulation is combined intoWherein, N1Equal to preferred emission wave beam number M.N1
The number for the symbol for including in the set formed for the symbol that the first data flow generates after ovennodulation, N2It is flowed through for the second data
The number for the symbol for including in the set of the symbol composition generated after ovennodulation, N1And N2It may be the same or different.For example,
First data flow is modulated using BPSK, and the collection of the symbol composition generated after modulation is combined into {+1, -1 }, N1=2；Second data flow is adopted
It is modulated with QPSK, the collection of the symbol composition generated after modulation is combined into { 1+j, 1-j, -1+j, -1-j }, N2=4.
Step 12: transmitter selects and the first data flow according to the corresponding relationship of pre-set symbol and launching beam
The corresponding launching beam of modulated symbol.
Transmitter is before emitting data flow, it is also necessary to preset the corresponding relationship between symbol and launching beam.Symbol
Corresponding relationship number between launching beam is used for indicating that the symbol is emitted in the form of the launching beam with this
The mode that launching beam represents the symbol emits the symbol.For example, preset symbol can be with launching beam corresponding relationship, the
One data flow is modulated to symbolWhen, it uses with k-th of launching beam BkTransmitting represents symbolMode, pass through k-th transmitting
Wave beam BkBy symbolIt is emitted to receiver, k ∈ 1 ..., M.
Step 13: transmitter uses in such a way that the launching beam of selection represents the modulated symbol of the first data flow, passes through
The launching beam of selection emits the modulated symbol of the first data flow, and uses and carry the second data flow with the launching beam selected
Modulated symbol mode emits the modulated symbol of the second data flow by the launching beam of selection.Wherein, the transmitting of selection
Wave beam is launching beam corresponding with the modulated symbol of the first data flow.
The number for the symbol for including in the set of the symbol composition generated after being modulated to the first data flow, is equal to transmitting
The number of the pre-set launching beam of machine.The embodiment of the present invention, which is used, represents the modulated symbol of the first data flow with launching beam
Number mode, the modulated symbol of the first data flow is transmitted to receiver, that is to say, that by the modulated symbol of the first data flow
Number receiver is transmitted to form of beams.
The method for illustrating the transmitting modulated symbol of two data streams.For example, for the first data flow, transmitter is worked as
Preceding transmitting is modulated symbolAccording to the corresponding relationship between symbol and launching beam, with symbolCorresponding transmitted wave
Beam is k-th of launching beam Bk, then transmitter is used with k-th of launching beam Bk, represent the modulated symbol of the first data flow
Mode, to receiver emit the modulated symbol of the first data flowTransmitter is currently after emitting the modulation of the second data flow
SymbolWhen, then use launching beam BkCarry the modulated symbol of the second data flowMode, to receiver transmitting second
The modulated symbol of data flowTransmitter emits k-th of launching beam B to receiverkAfterwards, receiver receives k-th of hair
Ejected wave beam Bk, due to k-th of launching beam BkRepresent first modulated symbol of data flowAnd it carries the second data
Flow modulated symbolTherefore, receiver can pass through k-th of launching beam BkParse the symbol of its representativeAnd its
The symbol of carrying
Transmitter generates symbol after being modulated to the first data flow.The symbol of generation can be packaged into multiple by transmitter
Packet transmission may include one or more symbols to receiver, a data packet.Transmitter is emitting the first data flow
When current data packet, according to preset symbol and launching beam corresponding relationship, determination is corresponding with the symbol of the packet encapsulation
Launching beam, use in such a way that the launching beam represents the modulated symbol of the first data flow, pass through the launching beam will
The packet transmission is to receiver.
Transmitter generates symbol after being modulated respectively to the second data flow.Equally, symbol is packaged into data by transmitter
Packet is transmitted to receiver.Transmitter is in the corresponding current data packet of the second data flow of transmitting, using the first data of current transmitting
The corresponding current data packet of second data flow is transmitted to receiver by the launching beam of stream.Whether the first data flow or
The number of two data flows, the symbol for including in the data packet that transmitter is sent every time is all the same, and transmitter passes through same number
Data packet respectively to receiver emit two data streams.
Send the symbol of two data streams simultaneously below by the launching beam how citing description passes through single radio-frequency channel.
Transmitting scene figure as shown in Figure 2, the first data flow S1X data packet: s is generated after ovennodulation and after signal behavior1(1), s1
(2)…s1(X), the second data flow S2X data packet s is generated after ovennodulation and after signal behavior2(1), s2(2)…s2(X).So
Afterwards, carry out beam selection, the symbol that the symbol for the first data flow being generated by identical launching beam and the second data flow generate
Number it is transmitted to receiver.
The collection for the symbol composition that 1: the first data flow of example is generated using QPSK modulation is combined into { 1+j, 1-j, -1+j, -1-j },
First data flow generates X data packet: s1(1), s1(2)…s1(X), launching beam is { B1, B2, B3, B4}.Second data flow is adopted
The collection of the symbol composition generated with QPSK modulation is combined into { 1+j, 1-j, -1+j, -1-j }, and the second data flow generates X data packet s2
(1), s2(2)…s2(X)。
Assuming that the number of the symbol sent every time is 2, it is, the symbol that each data packet of transmitter transmitting includes
Number is 2.In nth transmission, the symbol generated after the modulation of the first data flow is (- 1+j, -1-j), the corresponding data generated
Packet is s1(n)；The symbol generated after the modulation of second data flow is (1+j, 1-j), and the corresponding data packet generated is s2(n), wherein n
∈ 1 ..., X.
It is currently employed with launching beam B when sending first symbol 1+j of the second data flow3Represent the first data flow
First symbol -1+j mode, pass through launching beam B3First symbol -1+j of the first data flow is sent, then according to
Antenna parameter is arranged in the symbol -1+j of one data flow, for example, the parameters such as angles and positions of setting antenna make launching beam B3,
Using launching beam B3The mode for carrying first symbol 1+j of the second data flow, passes through launching beam B3Send the second data flow
First symbol 1+j.
It is currently employed with launching beam B when sending second symbol 1-j of the second data flow4, represent the first data flow
The second symbol -1-j mode, pass through launching beam B4The second symbol -1-j of the first data flow is sent, then according to the first number
Make launching beam B according to the symbol -1-j setting antenna parameter of stream4, using launching beam B4Carry second of the second data flow
The mode of symbol 1-j passes through launching beam B4Send second symbol 1-j of the second data flow.
The collection for the symbol composition that 2: the first data flow of example is generated using BPSK modulation is combined into {+1, -1 }, and the first data flow is raw
At X data packet: s1(1), s1(2)…s1(X), launching beam is { B1, B2}；Second data flow generates X data packet: s2(1),
s2(2)…s2(X), the collection for the symbol composition that the second data flow is generated using QPSK modulation is combined into { 1+j, 1-j, -1+j, -1-j }.
Assuming that the number of the symbol sent every time is 2, it is, the symbol that each data packet of transmitter transmitting includes
Number is 2.In nth transmission, the symbol generated after the modulation of the first data flow is (- 1, -1), is generated after the modulation of the second data flow
Symbol be (1+j, 1-j), n ∈ 1 ..., X.
It is currently employed with launching beam B when sending first symbol 1+j of the second data flow1Represent the first data flow
The mode of first symbol -1 passes through launching beam B1First symbol -1 for sending the first data flow, then according to the first data
Antenna parameter, which is arranged, in the symbol -1 of stream makes launching beam B1, using launching beam B1Carry first symbol 1 of the second data flow
The mode of+j passes through launching beam B1Send first symbol 1+j of the second data flow.
It is currently employed with launching beam B when sending second symbol 1-j of the second data flow2Represent the first data flow
The mode of second symbol -1 passes through launching beam B2Second symbol -1 for sending the first data flow, then according to the first data
Second symbol -1 setting antenna parameter of stream makes launching beam B2, using launching beam B2Carry the second of the second data flow
The mode of a symbol 1-j, passes through launching beam B2Send second symbol 1-j of the second data flow.
For the antenna with injection channel, the embodiment of the present invention is utilized the launching beam of antenna, is represented with launching beam
The modulated symbol of first data flow is transmitted to receiver by the modulated symbol mode of the first data flow, by currently emitting
The mode of the launching beam carrying modulated symbol of the second data flow of the symbol of one data flow, the second data flow is modulated
Symbol is transmitted to receiver, utilizes same wave beam to realize in synchronization while emitting the modulated symbol of two data streams
Number purpose, and then realize in synchronization, using multiple launching beams of single radio-frequency channel, while emitting two data streams
Purpose, reduce the antenna number of transmitter, the purpose of hoist capacity met in the case where limited space.
Further, on the basis of above-described embodiment, when emitting the second data flow, it can use before data and protection is not added
The carrier way at interval sends the second data flow, can also use single carrier frequency domain equalization (Single-carrier
Frequency Domain Equalization, abbreviation SC-FDE) mode sends the second data flow, multicarrier can also be used
Orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, abbreviation OFDM) mode sends second
Data flow.OFDM mode is a kind of mode that multicarrier is sent.Wherein, it is also referred to as the single carrier of protection interval is not added before data
For traditional single carrier, protection interval can be cyclic prefix (CP).
When sending the second data flow according to traditional carrier way, the second data flow is after ovennodulation by signal behavior
Generate X data packet s2(1), s2(2)…s2(X), X data packet of the second data flow, after sending the modulation of the first data flow
Symbol launching beam carry out carrying be transmitted to receiver.
When sending the second data flow according to OFDM mode, the second data flow generates X by signal behavior after ovennodulation
Data packet s2(1), s2(2)…s2(X), X data packet of the second data flow passes through fast Fourier inverse transformation (Inverse
Fast Fourier transform, abbreviation IFFT) it converts and generates OFDM data block after adding cyclic prefix (CP) processing.For
Each of one OFDM data block symbol, the launching beam by sending the modulated symbol of the first data flow are carried
It is transmitted to receiver.The second data flow is sent according to OFDM mode, sends the second data flow with according to traditional carrier way
It compares, the number of the data packet sent to receiver is changed.
The second data flow is sent according to single carrier frequency domain equalization SC-FDE mode.Second data flow is sent to letter after ovennodulation
Number selector generates X data packet s2(1), s2(2)…s2(X), data packet length is X+P, X+P number after increasing cyclic prefix
According to one frame of composition.For the nth symbol of second one data packet portions of data flow, after sending the modulation of the first data flow
Symbol launching beam carry out carrying be transmitted to receiver.
Further, above-described embodiment uses the different modulated distinct symbols of the first data flow of launching beam, and wave beam
The performance that the difference of selection will lead to antenna is different, and for the optimum performance for obtaining antenna, the embodiment of the invention also provides from list
The method of M preferred emission wave beam is selected in all launching beams in radio-frequency channel.
Transmitter can send signal using different launching beams, wherein different waves emits by different configurations
Beam corresponds to pilot tone independent and channel.
It is assumed that transmitter needs M preferred emission wave beam to represent the modulated symbol of i.e. the first data flow of different symbol signals
Number, preferred emission wave beamPilot tone beChannel is accordinglyWherein j ∈ 1 ..., M.All hairs of single radio-frequency channel
The total number of ejected wave beam is N, can select M preferred emission wave in N number of launching beam of single radio-frequency channel in the following manner
Beam:
Step 1: transmitter sends N number of pilot signal p to receiver respectively with different form of beamsi, receiver estimation
Each pilot signal piCorresponding channel Hi, wherein i ∈ 1 ..., N.It is assumed that pilot signal transmitted piWave beam be Bi, right
Answering channel is Hi。
Step 2: transmitter determines that the pilot signal of the 1st preferred emission beam transmission isWherein,Meet as follows
Condition:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel in the first step.
It indicates to calculate each piCorresponding Hi, maximum HiCorresponding pilot signal is exactlyTransmitting
The launching beam of pilot signal is the 1st excellent remote launching beam.Transmitter selects corresponding launching beam with pilot signal.
Step 3: transmitter determines m-th of preferred emission beam transmission pilot signalWherein,M ∈ 2 ..., M, M are the preferred emission wave in single radio-frequency channel
The total number of beam, H 'iIndicate HiTransposition conjugation, it is corresponding that J represents the pilot signal that the launching beam that has been selected is emitted
The serial number of channel, I represent the serial number for the corresponding channel of pilot signal that the launching beam not being selected is emitted, α and β difference
For weighting coefficient.The purpose selected in this way is, guarantee adjacent transmitted beams strongest simultaneously in i-th of launching beam power of satisfaction
Between interfere it is minimum.
After illustrating that transmitter emits two data streams to receiver through the foregoing embodiment below, how receiver parses two
A data flow.Transmitter is by having an antenna of single radio-frequency channel to emit signal to receiver, and receiver can pass through
Mutiple antennas receives signal.
By taking transmitter sends the second data flow according to single carrier frequency domain equalization SC-FDE mode as an example, receiver can be by such as
First data flow s required under type obtains1With the second data flow s2:
Step 1: finding out xk(i), xk(i) signal phasor that receiver receives when k launching beam transmitting is indicated.
Wherein, k=1,2 ... N1, i=1,2 ... N, N1For the sum of the preferred emission wave beam of transmitter, N is transmitter hair
The number for the data packet sent, k-th of transmitting signal are vector xk, k-th of transmitting signal is using k launching beam transmitting.
Step 2: with such as under typeObtain i-th of s1(i) and s2(i) valuation, s1(i)
Indicate the data for the first data flow for including in the signal phasor of k-th of launching beam transmitting, s2(i) k-th of transmitted wave is indicated
The data for the second data flow for including in the signal phasor of beam transmitting.Wherein, i=1,2 ..., N,
Indicate traversal xkWith the various combinations of S, select wherein one the smallest.
If the value obtained after traversal are as follows:K=m2, i.e.,In xkIn all combinations of s
Minimum then hasThat is, passing throughFind k-th of transmitted wave
The symbol of the second data flow of beam transmitting isI.e.And k=m2；Then, according to symbol and launching beam it
Between corresponding relationship, can determine and m2A launching beam corresponds to symbolThenI.e. with m2A wave beam generation
TableForm send symbolI.e.
X in the first stepk(i) circular is as follows:
Receiver can be expressed as form after removing CP from the signal that m root antenna receives, for convenience,
It is assumed that transmitted from transmitter to receiver only exists two transmission paths in system:
WhereinRepresent corresponding m-th of symbol pth diameter of n-th antenna
Upper corresponding channel.
IFFT transformation matrix is
S=[s2(1), s2(2), s2(N)]TFor the corresponding column vector of transmitting signal.
Redefining k-th of transmitting signal is vector xk:
Wherein k-th of transmitting signal is using lkA wave
Beam transmitting.
Then above formula can be re-expressed as:
It is available that FFT transform is carried out to above formula:
Receiver has N number of receiving antenna, then can indicate are as follows:
For i-th of symbol therein, can indicate are as follows:
If N >=N1, then above formula can be found out corresponding by the methods of ZF or L-MMSEWherein i=1,2 ...,
N., rightX can be obtained by making inversefouriertransformk(i), k=1,2 ..., N1。
As shown in figure 3, the embodiment of the present invention also provides a kind of transmitter, comprising: modulator 31, processor 32 and transmitter
33。
Modulator 31 is modulated first data flow for modulating the first data flow and the second data flow respectively
The number for the symbol for including in the set of the symbol composition generated afterwards, it is pre-set equal to single radio-frequency channel of the transmitter
The sum of launching beam.
Processor 32, for the corresponding relationship according to pre-set symbol and launching beam, selection and first number
According to the corresponding launching beam of the modulated symbol of stream.
Transmitter 33, for using the launching beam to select to represent in a manner of the modulated symbol of the first data flow,
Emit the modulated symbol of the first data flow to receiver by the selected launching beam, and uses with the selection
Launching beam carry the modulated symbol mode of the second data flow, sent out by the selected launching beam to the receiver
Penetrate the modulated symbol of the second data flow；Wherein, the selected launching beam is and the modulated symbol pair of the first data flow
The preferred emission wave beam answered.
Transmitter provided in this embodiment can be used to implement Fig. 1 offer stream transmission method, above-mentioned each device or
The description in Fig. 1 corresponding embodiment can be can be found in.
Illustrate how transmitter emits the modulated symbol of two data streams.For example, for the first data flow, transmitting
What machine currently emitted is modulated symbolAccording to the corresponding relationship between symbol and preferred emission wave beam, with symbolIt is corresponding
Launching beam be k-th of launching beam Bk, then transmitter is used with k-th of launching beam Bk, after representing the modulation of the first data flow
SymbolMode, to receiver emit the modulated symbol of the first data flowTransmitter is currently emitting the second data flow
Modulated symbolWhen, then use launching beam BkCarry the modulated symbol of the second data flowMode, to receiver send out
Penetrate the modulated symbol of the second data flowTransmitter emits k-th of launching beam B to receiverkAfterwards, receiver receives
K launching beam Bk, due to k-th of launching beam BkRepresent first modulated symbol of data flowAnd it carries second
The modulated symbol of data flowTherefore, receiver can pass through k-th of launching beam BkParse the symbol of its representativeWith
And its symbol of carrying
For the antenna with injection channel, the embodiment of the present invention is utilized the launching beam of antenna, is represented with launching beam
The modulated symbol of first data flow is transmitted to receiver by the modulated symbol mode of the first data flow, by currently emitting
The mode of the launching beam carrying modulated symbol of the second data flow of the symbol of one data flow, the second data flow is modulated
Symbol is transmitted to receiver, utilizes same wave beam to realize in synchronization while emitting the modulated symbol of two data streams
Number purpose, and then realize in synchronization, using multiple launching beams of single radio-frequency channel, while emitting two data streams
Purpose, reduce the antenna number of transmitter, the purpose of hoist capacity met in the case where limited space.
It on the basis of the above embodiments, is the optimum performance for obtaining antenna, transmitter provided in an embodiment of the present invention is also
With the function of selecting M preferred emission wave beam from all launching beams in single radio-frequency channel:
The transmitter 33 is also used to send N number of pilot signal p to the receiver respectively with different form of beamsi,
The receiver estimates each pilot signal piCorresponding channel Hi, wherein i ∈ 1 ..., N.N is the hair of single radio-frequency channel
The total number of ejected wave beam.
The processor 32 is also used to determine that the pilot signal of the 1st preferred emission beam transmission isWherein,It is full
The following condition of foot:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel.
The processor 32 is also used to determine m-th of preferred emission beam transmission pilot signalWherein,M ∈ 2 ..., M, H 'iIndicate HiTransposition conjugation, J representative be selected
The serial number of the corresponding channel of pilot signal that is emitted of launching beam, I represents what the launching beam not being selected was emitted
The serial number of the corresponding channel of pilot signal, α and β are respectively weighting coefficient.
On the basis of the above embodiments, the second data flow also has multiple transmitting modes:
The transmitter 33, is also used to through the selected launching beam, according to protection interval is not added before data
Carrier way emits the modulated symbol of the second data flow.The transmitter is also used to through the selected launching beam,
Emit the modulated symbol of the second data flow according to single carrier frequency domain equalization mode.The transmitter is also used to through the choosing
The launching beam selected emits the modulated symbol of the second data flow according to multi-carrier OFDM mode.
Specifically, when transmitter sends the second data flow according to OFDM mode, the second data flow is after ovennodulation by letter
Number selection generate X data packet s2(1), s2(2)…s2(X), X data packet of the second data flow converts by IFFT and adds CP
OFDM data block is generated after processing.For each of OFDM data block symbol, by sending the modulation of the first data flow
The launching beam of symbol afterwards carries out carrying and is transmitted to receiver.The second data flow is sent according to OFDM mode, and according to tradition
Carrier way send the second data flow and compare, the number of data packet sent to receiver is changed.
Transmitter sends the second data flow according to single carrier frequency domain equalization SC-FDE mode.Second data flow is after ovennodulation
It is sent to signal selector and generates X data packet s2(1), s2(2)…s2(X), data packet length is X+P, X+ after increasing cyclic prefix
P data form a frame.For the nth symbol of second one data packet portions of data flow, by sending the first data flow
The launching beam of modulated symbol carries out carrying and is transmitted to receiver.
It should be noted that above-mentioned optional embodiment can be implemented in the same embodiment, it can also be in difference
Embodiment in implement, can be optionally combined.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (12)
1. a kind of double fluid launching technique characterized by comprising
Transmitter modulates the first data flow and the second data flow, the set of symbols that first data flow generates after being modulated respectively
At set in include symbol number, it is total equal to the pre-set launching beam in single radio-frequency channel of the transmitter
Number；
The transmitter is according to the corresponding relationship between pre-set symbol and launching beam, selection and first data flow
The corresponding launching beam of modulated symbol；
The transmitter uses in such a way that the launching beam of selection represents the modulated symbol of the first data flow, by described
The launching beam of selection emits the modulated symbol of the first data flow to receiver, and uses with the selected transmitted wave
Beam carries the modulated symbol mode of the second data flow, is counted by the selected launching beam to receiver transmitting second
According to the modulated symbol of stream；Wherein, the selected launching beam is transmitting corresponding with the modulated symbol of the first data flow
Wave beam.
2. the method according to claim 1, wherein modulating the first data flow and second respectively in the transmitter
Before data flow, further includes:
The transmitter selects preferred emission wave beam from all launching beams in single radio-frequency channel, to described first
The number for the symbol for including in the set for the symbol composition that data flow generates after being modulated, equal to the injection frequency of the transmitter
The sum of the preferred emission wave beam in channel, the corresponding relationship between the pre-set symbol and launching beam are to preset
Symbol and preferred emission wave beam between corresponding relationship.
3. according to the method described in claim 2, it is characterized in that, the transmitter is from all hairs in single radio-frequency channel
Preferred emission wave beam is selected in ejected wave beam, comprising:
The transmitter sends N number of pilot signal p to the receiver respectively with different form of beamsi, the receiver estimation
Each pilot signal piCorresponding channel Hi, wherein i ∈ 1 ..., N；The N is the transmitted wave in single radio-frequency channel
The total number of beam；
The transmitter determines that the pilot signal of the 1st preferred emission beam transmission isWherein,Meet following condition:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel；
The transmitter determines m-th of preferred emission beam transmission pilot signalWherein,H′iIndicate HiTransposition conjugation, J represent by
The serial number of the corresponding channel of the pilot signal that the launching beam chosen is emitted, I represent the launching beam not being selected and are sent out
The serial number of the corresponding channel of the pilot signal penetrated, α and β are respectively weighting coefficient, and M is the preferred emission in single radio-frequency channel
The total number of wave beam.
4. method according to claim 1,2 or 3, which is characterized in that pass through selected launching beam transmitting second
The modulated symbol of data flow, comprising:
By the selected launching beam, emit the second data flow according to the carrier way that protection interval is not added before data
Modulated symbol.
5. method according to claim 1,2 or 3, which is characterized in that pass through selected launching beam transmitting second
The modulated symbol of data flow, comprising:
By the selected launching beam, emit the modulated symbol of the second data flow according to single carrier frequency domain equalization mode.
6. method according to claim 1,2 or 3, which is characterized in that pass through selected launching beam transmitting second
The modulated symbol of data flow, comprising:
By the selected launching beam, emit the modulated symbol of the second data flow according to multi-carrier OFDM mode
Number.
7. a kind of transmitter characterized by comprising
Modulator, for modulating the first data flow and the second data flow respectively, what first data flow generated after being modulated
The number for the symbol for including in the set of symbol composition, equal to the pre-set launching beam in single radio-frequency channel of the transmitter
Sum；
Processor, for according to the corresponding relationship between pre-set symbol and launching beam, selection and first data
Flow the corresponding preferred emission wave beam of modulated symbol；
Transmitter passes through institute for using the launching beam to select to represent in a manner of the modulated symbol of the first data flow
The launching beam for stating selection emits the modulated symbol of the first data flow to receiver, and uses with the selected transmitting
The modulated symbol mode of the second data flow of beams carry emits second to the receiver by the selected launching beam
The modulated symbol of data flow；Wherein, the selected launching beam is corresponding with the modulated symbol of the first data flow excellent
Select launching beam.
8. transmitter according to claim 7, it is characterised in that:
The processor is also used to select preferred emission wave beam from all launching beams in single radio-frequency channel, right
The number for the symbol for including in the set for the symbol composition that first data flow generates after being modulated, is equal to the transmitter
Single radio-frequency channel preferred emission wave beam sum, the corresponding relationship between the pre-set symbol and launching beam is
Corresponding relationship between pre-set symbol and preferred emission wave beam.
9. transmitter according to claim 8, it is characterised in that:
The transmitter is also used to send N number of pilot signal p to the receiver respectively with different form of beamsi, described to connect
Receipts machine estimates each pilot signal piCorresponding channel Hi, wherein i ∈ 1 ..., N；The N is in single radio-frequency channel
Launching beam total number；
The processor is also used to determine that the pilot signal of the 1st preferred emission beam transmission isWherein,Meet as follows
Condition:Wherein, i ∈ 1 ..., N, HiTo estimate obtained channel；
The processor is also used to determine m-th of preferred emission beam transmission pilot signalWherein,H′iIndicate HiTransposition conjugation, J represent by
The serial number of the corresponding channel of the pilot signal that the launching beam chosen is emitted, I represent the launching beam not being selected and are sent out
The serial number of the corresponding channel of the pilot signal penetrated, α and β are respectively weighting coefficient, and M is the preferred hair in single radio-frequency channel
The total number of ejected wave beam.
10. according to transmitter described in claim 7,8 or 9, which is characterized in that the transmitter is also used to through the choosing
The launching beam selected emits the modulated symbol of the second data flow according to the carrier way that protection interval is not added before data.
11. according to transmitter described in claim 7,8 or 9, which is characterized in that the transmitter is also used to through the choosing
The launching beam selected emits the modulated symbol of the second data flow according to single carrier frequency domain equalization mode.
12. according to transmitter described in claim 7,8 or 9, which is characterized in that the transmitter is also used to through the choosing
The launching beam selected emits the modulated symbol of the second data flow according to multi-carrier OFDM mode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/086941 WO2016041197A1 (en) | 2014-09-19 | 2014-09-19 | Dual-flow transmission method and transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106797628A CN106797628A (en) | 2017-05-31 |
| CN106797628B true CN106797628B (en) | 2019-11-29 |
Family
ID=55532478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480081496.8A Active CN106797628B (en) | 2014-09-19 | 2014-09-19 | Double-current launching technique and transmitter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106797628B (en) |
| WO (1) | WO2016041197A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577573A (en) * | 2008-05-09 | 2009-11-11 | 中兴通讯股份有限公司 | Method and device for controlling independent data stream |
| CN101594176A (en) * | 2008-05-27 | 2009-12-02 | 大唐移动通信设备有限公司 | The equipment of dual-layer beam forming method, device and the transmission of support dual-layer beam forming |
| CN101814937A (en) * | 2009-02-19 | 2010-08-25 | 三星电子株式会社 | Apparatus and method for supporting multiple-input multiple-output and beamforming simultaneously in wireless communication system |
| WO2012097862A1 (en) * | 2011-01-17 | 2012-07-26 | Telefonaktiebolaget L M Ericsson (Publ) | An active antenna arrangement for transmitting precoded signals in a communication system, base station, methods and computer programs |
| WO2013022321A2 (en) * | 2011-08-11 | 2013-02-14 | Samsung Electronics Co., Ltd. | Method and apparatus for mixed analog/digital beamforming |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4777440B2 (en) * | 2006-02-01 | 2011-09-21 | エルジー エレクトロニクス インコーポレイティド | Data transmission / reception method using superposition modulation in wireless communication system |
-
2014
- 2014-09-19 WO PCT/CN2014/086941 patent/WO2016041197A1/en active Application Filing
- 2014-09-19 CN CN201480081496.8A patent/CN106797628B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577573A (en) * | 2008-05-09 | 2009-11-11 | 中兴通讯股份有限公司 | Method and device for controlling independent data stream |
| CN101594176A (en) * | 2008-05-27 | 2009-12-02 | 大唐移动通信设备有限公司 | The equipment of dual-layer beam forming method, device and the transmission of support dual-layer beam forming |
| CN101814937A (en) * | 2009-02-19 | 2010-08-25 | 三星电子株式会社 | Apparatus and method for supporting multiple-input multiple-output and beamforming simultaneously in wireless communication system |
| WO2012097862A1 (en) * | 2011-01-17 | 2012-07-26 | Telefonaktiebolaget L M Ericsson (Publ) | An active antenna arrangement for transmitting precoded signals in a communication system, base station, methods and computer programs |
| WO2013022321A2 (en) * | 2011-08-11 | 2013-02-14 | Samsung Electronics Co., Ltd. | Method and apparatus for mixed analog/digital beamforming |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106797628A (en) | 2017-05-31 |
| WO2016041197A1 (en) | 2016-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102414999B (en) | Apparatus and method for transmitting reference signal in wireless communication system | |
| CN101682453B (en) | CDD precoding for open loop SU MIMO | |
| US7567625B2 (en) | Apparatus and method for sub-carrier allocation in a multiple-input and multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system | |
| US8611449B2 (en) | Method and apparatus for demodulation of a reference signal | |
| CN102017449B (en) | Method for transmitting and receiving signals in open-loop spatial multiplexing mode | |
| JP5180299B2 (en) | Transmission method using delay diversity and space-frequency diversity | |
| US8514783B2 (en) | Method and apparatus for transmitting signal in wireless communication system | |
| EP2392081B1 (en) | Antenna virtualization in a wireless communication environment | |
| RU2340100C1 (en) | Device and method of frequency-space-time coding for increasing efficiency | |
| US11153125B2 (en) | Transmission apparatus, reception apparatus, transmission method, and reception method | |
| EP2731276B1 (en) | Multi-antenna signal processing method and device in uplink system | |
| US9531462B2 (en) | Wireless communication system, wireless transmitter, and control program for wireless transmitter | |
| CN101378299A (en) | Transmission diversity method base on null-frequency encode | |
| CN105141563A (en) | Space frequency combined modulation design scheme used for MIMO-OFDM system | |
| US20220038326A1 (en) | Transmission device and transmission method | |
| CN103731243A (en) | Power control factor selecting method in space modulating system | |
| KR101408927B1 (en) | Reciving apparatus and method for maximum likelihood in single carrier system | |
| EP2822191B1 (en) | Transmitting apparatus, receiving apparatus, and control methods thereof | |
| CN106797628B (en) | Double-current launching technique and transmitter | |
| CN102984102B (en) | Upstream data transmission, uplink data processing method, terminal and base station | |
| KR20130017094A (en) | Methods and systems for hybrid mimo schemes in ofdm/a systems | |
| CN117063449A (en) | Signal transmission method and device | |
| Fan et al. | Differential spatial frequency modulation with orthogonal frequency division multiplexing | |
| CN102868490B (en) | Low-complexity sphere decoding detection method | |
| EP3989501A1 (en) | Dual carrier index modulation (dc-im) ofdm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |