CN104506275B - A kind of LTE signal transmission systems based on automatic adjusument reference vector - Google Patents
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Abstract
A kind of LTE signal transmission systems based on automatic adjusument reference vector.The LTE signal transmission systems based on automatic adjusument reference vector of the present invention solve the problems, such as that the efficiency of transmission of existing LTE system and the mutual of transmission bandwidth are limited, influence problem of the higher modulation gain to system efficiency of transmission is also preferably resolved simultaneously, band efficiency greatly improved.The system comprises transmitter unit, receiving unit and coding vector offset relationships to preset unit, wherein, the transmitter unit includes sequentially connected first multichannel converter unit, grouped element, joint transmitting signal generation unit and rf transmitter unit, the receiving unit and includes sequentially connected correlator unit, multichannel recovery unit and the second multichannel converter unit.
Description
Technical field
The present invention relates to wireless communication field more particularly to a kind of LTE signals biographies based on automatic adjusument reference vector
Defeated system.
Background technology
LTE (long term evolution) is the UMTS (universal mobile communications organized to set up by 3GPP (third generation partner program)
System) technical standard long term evolution, formally set up the project and open in the TSGRAN#26 meetings of 3GPP Toronto in December, 2004
It is dynamic.LTE system introduces the critical transmissions technology such as OFDM (Orthogonal Frequency Division Multiplexing) and MIMO (multiple-input and multiple-output), dramatically increases
(20M bandwidth 2X2MIMO in 64QAM, theoretical downlink peak transfer rate is for spectrum efficiency and message transmission rate
201Mbps removes about 140Mbps, but limited according to practical networking and terminal capability after signaling overheads, it is considered that under
Row peak rate is 100Mbps, upper behavior 50Mbps), and various bandwidth is supported to distribute：1.4MHz, 3MHz, 5MHz, 10MHz,
15MHz and 20MHz etc., and support global mainstream 2G/3G frequency ranges and some newly-increased frequency ranges, thus frequency spectrum distribution is more flexible, is
System capacity and covering are also obviously improved.The more flattening of the LTE system network architecture is simplified, and reduces network node and system is answered
Miscellaneous degree so as to reduce Time Delay of Systems, also reduces network deployment and maintenance cost.LTE system is supported and other 3GPP systems
Interoperability.There are two types of standards for LTE system：FDD-LTE and TDD-LTE, i.e. frequency division duplex LTE system and time division duplex LTE system,
The main distinction of the two technology is in the physical layer of air interface (as frame structure, time-division design, synchronous etc.).FDD-LTE systems
System eats dishes without rice or wine downstream transmission using a pair of symmetrical UHF band reception and transmitting data, and TDD-LTE system uplink and downlink then uses phase
Same frequency range is transmitted on different time slots, and relative to FDD duplex modes, TDD has the higher availability of frequency spectrum.
However existing LTE system, signal transmission is still limited by band bandwidth, but it has data transmission rate again
Very high requirement, therefore, how before transmission bandwidth and data transmission rate compromise is obtained, is obtained most with minimum bandwidth
Big data transmission efficiency is still the emphasis of research.
Invention content
The purpose of the present invention is what is be achieved through the following technical solutions.
According to the embodiment of the present invention, a kind of LTE signal transmission systems based on automatic adjusument reference vector are proposed,
The system comprises transmitter unit, receiving unit and coding vector offset relationships to preset unit, wherein, the transmitter unit includes
Sequentially connected first multichannel converter unit, grouped element, joint transmitting signal generation unit and rf transmitter unit, institute
It states receiving unit and includes sequentially connected correlator unit, multichannel recovery unit and the second multichannel converter unit.
According to the embodiment of the present invention, the coding vector offset relationship presets unit pre-arranged code vector offset pass
System；It specifically includes：
Transmitter unit and receiving unit preset identical M dimension false noise coding vector offset relationships, define M dimensions
False noise coding vector combining form is as follows：
L is the code element number in each false noise coding period, and the vector for choosing identifier minimum in r vector is certainly
It adapts to adjust reference vector, transmitting selectsCommon r vector, identifier NO1＜ NO2＜ ...
＜ NOr, PNi(0) it is the i-th (i=NO in M vector2, NO3..., NOr) it is a vector relative to fixed reference vector No. 0
Position, it is described
I-th of vector deviates p position relative to automatic adjusument reference vector position and is defined as PN to the lefti(p)：
According to the embodiment of the present invention, the first multichannel converter unit carries out multichannel transformation to data to be launched, obtains
Obtain Q roads signal；It specifically includes：
In emission process, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, each information data period is Td, wherein
QTd=LTc, code element numbers of the L for each false noise coding period, TcFor chip period；Q bit transmissions information is sent into more
Road converter obtains Q roads signal.
According to the embodiment of the present invention, Q roads signal is grouped and specifically includes by the grouped element：
The Q roads signal of acquisition is divided into three groups, described three groups according to the correspondence of signal vector shift state and data
It corresponds to respectivelyBit, r bits and (r-1) [log2L] bit；Wherein, the vector offset state includes：
State 1：R are chosen from the pseudo noise vector race that M false noise coding vector forms according to Data Matching algorithm
The vector of transmitting, it is a total ofKind transmitting modulation vector situation screening, to that should be able to transmitThe information data of bit,
[x] is represented to x round numbers part,It is the combination that r is taken in M；
State 2：The r modulation vector selected only uses positive phase or the state of minus phase, if screening r modulate to
Certain phase state transmitting of amount, then have 2rKind phase state transmitting, to the information data of r bits should be able to be transmitted；
State 3：In the r vector selected, using vectorial identifier reckling vector as this reference vector, other (r-1)
In a vector, each vector has L position that can screen and is emitted, then shares (r-1) [log2L] bit information biography
It is defeated；
Above-mentioned vector offset state and data to be transmitted are corresponded, then corresponding information data Q is：
According to the embodiment of the present invention, the joint transmitting signal generation unit generation joint transmitting signal specifically wraps
It includes：R transmitting false noise coding vector, vector offset state is selected, transmitting is merged, is formed and is adjusted based on adaptive
Save the modulated signal offset combinations relationship of reference vector：
In formula,R vectorial multichannel merges, and forms joint transmitting signal：
MD is joint transmitting signal, and t is time variable,It is that i-th of transmitting vector of jth time is vectorial relative to fixed reference
It deviates to the leftA position.
According to the embodiment of the present invention, the rf transmitter unit will be combined after transmitting signal carries out rf conversion and be carried out
Transmitting, the transmitting signal is s (t)：
In formula, P is radio-frequency emission power.
According to the embodiment of the present invention, the correlator unit specifically includes for receiving simultaneously demodulated received signal：
Under random hash noisy communication channel, the signal of above-mentioned transmitting is received, receiving signal is
R (t)=s (t- τ)+n (t)+J (t),
In formula, τ is communication propagation delays；N (t) is random hash noise, and J (t) is interference signal；
The M correlator set by receiving unit uses PN respectively after radio-frequency transmissions demodulationi(t) (i=1,2 ...
M) make demodulation process, then (1≤i≤M) a correlator output is i-th in M correlator：
In formula, τ is communication propagation delays；I=ijIntegration be modulation vector auto-correlation；I ≠ ij is cross-correlation；It is related
Device exports
The two groups of pseudo noise vectors used are accurate orthogonal each other.
According to the embodiment of the present invention, the multichannel recovery unit is used for the recovery of Q circuit-switched data from the signal after demodulation
Information；It specifically includes：
It is inverse that M correlator output value of acquisition and its correspondence false noise coding identifier are subjected to data-vector screening
Matching, from the L phase output values in M correlator, filters out the modulation vector corresponding to r output valve of maximum absolute value
Identifier and offset relationship emit vector as the joint that transmitting comes, wherein using vectorial identifier reckling as this secondary standard to
Amount, the deviation posts of other big identifiers are subject to this reference vector, carry out the inverse matching of data-offset, obtain the Q of reception
Circuit-switched data information；
According to the embodiment of the present invention, the second multichannel converter unit arrives the Q circuit-switched data information of reception through multichannel
Single channel is converted, and obtains Q bit informations.
According to the embodiment of the present invention, the puppet formed according to Data Matching algorithm from M false noise coding vector
The r vector emitted is chosen in noise vector race is specially：
A1, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, it is divided into three parts, is
d1, d2, d3..., dk={ d{s}, d{e}, d{p}}；
Wherein d{s}For
Wherein d{e}For
Wherein d{p}For
K3=(r-1) [log in formula2L]；
A2, d{s}For r information, can define Binary Zero is positive phase, and binary one is minus phase, theData correspond to
The 1st vectorial phase chosen, theA data correspond to the vectorial phase of r-th chosen, there is 2rKind possible state, corresponding informance
Data are r bits；
A3, r vector is chosen from M vector, according to matching principle sorting with conventional combined in parallel modulation, hadKind possible state, corresponding informance data areBit；
A4, d{p}Position information is divided into (r-1) group, and every group is piPosition, it is inclined for automatic adjusument reference vector according to pi
I-th of vector of shiftingState carries out vector offset, hasKind possible state, corresponding informance data are (r-
1)·[log2L] bit.
Advantage of the invention is that：The present invention solve the efficiency of transmission of existing LTE system and the mutual of transmission bandwidth by
The problem of limit, while influence problem of the higher modulation gain to system efficiency of transmission is also preferably resolved, increase substantially frequency
Band utilization rate.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Attached drawing 1 shows the LTE signal transmissions system based on automatic adjusument reference vector according to embodiment of the present invention
System.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure, and can be by this public affairs on the contrary, providing these embodiments
The range opened completely is communicated to those skilled in the art.
According to the embodiment of the present invention, a kind of LTE signal transmission systems based on automatic adjusument reference vector are proposed,
As shown in Figure 1, the system comprises transmitter unit, receiving unit and coding vector offset relationships to preset unit, wherein, it is described
Transmitter unit includes sequentially connected first multichannel converter unit, grouped element, joint transmitting signal generation unit and radio frequency
Transmitter unit, it is single that the receiving unit includes sequentially connected correlator unit, multichannel recovery unit and the transformation of the second multichannel
Member.
According to the embodiment of the present invention, the coding vector offset relationship presets unit pre-arranged code vector offset pass
System；It specifically includes：
Transmitter unit and receiving unit preset identical M dimension false noise coding vector offset relationships, define M dimensions
False noise coding vector combining form is as follows：
L is the code element number in each false noise coding period, and the vector for choosing identifier minimum in r vector is base
Quasi- vector, i.e. automatic adjusument reference vector, transmitting selectCommon r vector, identifier
NO1＜ NO2＜ ... ＜ NOr, automatic adjusument reference vector that is vectorial then being this transmitting information, PNi(0) for M it is vectorial in the
I (i=NO2, NO3..., NOr) it is a vector relative to fixed reference vector No. 0 position, it is described
I-th of vector deviates p position relative to automatic adjusument reference vector position and is defined as PN to the lefti(p)：
According to the embodiment of the present invention, the first multichannel converter unit carries out multichannel transformation to data to be launched, obtains
Obtain Q roads signal；It specifically includes：
In emission process, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, each information data period is Td, wherein
QTd=LTc, code element numbers of the L for each false noise coding period, TcFor chip period；Q bit transmissions information is sent into more
Road converter obtains Q roads signal.
According to the embodiment of the present invention, Q roads signal is grouped and specifically includes by the grouped element：
The Q roads signal of acquisition is divided into three groups, described three groups according to the correspondence of signal vector shift state and data
It corresponds to respectivelyBit, r bits and (r-1) [log2L] bit；Wherein, the vector offset state includes：
State 1：R are chosen from the pseudo noise vector race that M false noise coding vector forms according to Data Matching algorithm
The vector of transmitting, it is a total ofKind transmitting modulation vector situation screening, to that should be able to transmitThe information data of bit,
[x] is represented to x round numbers part,It is the combination that r is taken in M；
State 2：The r modulation vector selected only uses positive phase or the state of minus phase, if screening r modulate to
Certain phase state transmitting of amount, then have 2rKind phase state transmitting, to the information data of r bits should be able to be transmitted；
State 3：In the r vector selected, using vectorial identifier reckling vector as this reference vector, other (r-1)
In a vector, each vector has L position that can screen and is emitted, then shares (r-1) [log2L] bit information biography
It is defeated；
Above-mentioned vector offset state and data to be transmitted are corresponded, then corresponding information data Q is：
According to the embodiment of the present invention, the joint transmitting signal generation unit generation joint transmitting signal specifically wraps
It includes：R transmitting false noise coding vector, vector offset state is selected, transmitting is merged, is formed and is adjusted based on adaptive
Save the modulated signal offset combinations relationship of reference vector：
In formula,R vectorial multichannel merges, and forms joint transmitting signal：
MD is joint transmitting signal, and t is time variable,It is that i-th of transmitting vector of jth time is vectorial relative to fixed reference
It deviates to the leftA position.
According to the embodiment of the present invention, the rf transmitter unit will be combined after transmitting signal carries out rf conversion and be carried out
Transmitting, the transmitting signal is s (t)：
In formula, P is radio-frequency emission power.
According to the embodiment of the present invention, the correlator unit specifically includes for receiving simultaneously demodulated received signal：
Under random hash noisy communication channel, the signal of above-mentioned transmitting is received, receiving signal is
R (t)=s (t- τ)+n (t)+J (t),
In formula, τ is communication propagation delays；N (t) is random hash noise, and double-side band power spectral density is N0/2；J(t)
For interference signal；The frequency of transmitter unit and receiving unit carrier wave, code element phase are fully synchronized；
The M correlator set by receiving unit uses PN respectively after radio-frequency transmissions demodulationi(t) (i=1,2 ...
M) make demodulation process, then (1≤i≤M) a correlator output is i-th in M correlator：
In formula, τ is communication propagation delays；I=ijIntegration be modulation vector auto-correlation；I ≠ ij is cross-correlation；It is related
Device exports
The two groups of pseudo noise vectors used are accurate orthogonal each other.
According to the embodiment of the present invention, the multichannel recovery unit is used for the recovery of Q circuit-switched data from the signal after demodulation
Information；It specifically includes：
It is inverse that M correlator output value of acquisition and its correspondence false noise coding identifier are subjected to data-vector screening
Matching, from the L phase output values in M correlator, filters out the modulation vector corresponding to r output valve of maximum absolute value
Identifier and offset relationship emit vector as the joint that transmitting comes, wherein using vectorial identifier reckling as this secondary standard to
Amount, the deviation posts of other big identifiers are subject to this reference vector, carry out the inverse matching of data-offset, obtain the Q of reception
Circuit-switched data information；
According to the embodiment of the present invention, the second multichannel converter unit arrives the Q circuit-switched data information of reception through multichannel
Single channel is converted, and obtains Q bit informations.
According to the embodiment of the present invention, the puppet formed according to Data Matching algorithm from M false noise coding vector
The r vector emitted is chosen in noise vector race is specially：
A1, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, it is divided into three parts, is
d1, d2, d3..., dk={ d{s}, d{e}, d{p}}；
Wherein d{s}For
Wherein d{e}For
Wherein d{p}For
K3=(r-1) [log in formula2L]；
A2, d{s}For r information, can define Binary Zero is positive phase, and binary one is minus phase, theData correspond to
The 1st vectorial phase chosen, theA data correspond to the vectorial phase of r-th chosen, there is 2rKind possible state, corresponding informance
Data are r bits；
A3, r vector is chosen from M vector, according to matching principle sorting with conventional combined in parallel modulation, hadKind possible state, corresponding informance data areBit；
A4, d{p}Position information is divided into (r-1) group, and every group is piPosition, it is inclined for automatic adjusument reference vector according to pi
I-th of vector of shiftingState carries out vector offset, hasKind possible state, corresponding informance data are (r-
1)·[log2L] bit.
According to the embodiment of the present invention, the reference vector of transmitting data is different from every time, all with vectorial identifier most
Small person is this reference vector, the deviation posts of other big identifiers is subject to this reference vector and carries out offset modulation.With
It is upper described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, it is any to be familiar with sheet
In the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in should all be covered those skilled in the art
Within protection scope of the present invention.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.
Claims (4)
1. a kind of LTE signal transmission systems based on automatic adjusument reference vector the system comprises transmitter unit, receive list
Member and coding vector offset relationship preset unit, wherein, the transmitter unit include sequentially connected first multichannel converter unit,
Grouped element, joint transmitting signal generation unit and rf transmitter unit, the receiving unit include sequentially connected correlation
Device unit, multichannel recovery unit and the second multichannel converter unit；
The coding vector offset relationship presets unit pre-arranged code vector offset relationship；It specifically includes：
Transmitter unit and receiving unit preset identical M dimension false noise coding vector offset relationships, define M dimension puppets and make an uproar
Sound encoder vector combining form is as follows：
L is the code element number in each false noise coding period, and it is adaptive to choose the vector of identifier minimum in r vector
Reference vector is adjusted, is selectedCommon r vector, identifier NO1＜ NO2＜ ... ＜ NOr, PNi
(0) it is i-th, i=NO in M vector2, NO3..., NOr, a vectorial No. 0 position relative to automatic adjusument reference vector
It puts, it is described
I-th of vector deviates p position relative to automatic adjusument reference vector position and is defined as PN to the lefti(p)：
The first multichannel converter unit carries out multichannel transformation to data to be launched, obtains Q roads signal；It specifically includes：
In emission process, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, each information data period is Td, wherein QTd=
LTc, code element numbers of the L for each false noise coding period, TcFor chip period；Q bit transmissions information is sent into multichannel transformation
Device obtains Q roads signal；
Q roads signal is grouped and specifically includes by the grouped element：
The Q roads signal of acquisition is divided into three groups according to the correspondence of signal vector shift state and data, three groups of difference
It corresponds toBit, r bits and (r-1) [log2L] bit；Wherein, the vector offset state includes：
State 1：R transmitting is chosen from the pseudo noise vector race that M false noise coding vector forms according to Data Matching algorithm
Vector, it is a total ofKind transmitting modulation vector situation screening, to that should be able to transmitThe information data of bit, [x] table
Show to x round numbers part,It is the combination that r is taken in M；
State 2：The r modulation vector selected only uses positive phase or the state of minus phase, if r modulation vector of screening
Certain phase state emits, then has 2rKind phase state transmitting, to the information data of r bits should be able to be transmitted；
State 3：In the r vector selected, using vectorial identifier reckling vector as this reference vector, other r-1 vector
In, each vector has L position that can screen and is emitted, then shares (r-1) [log2L] bit information transmission；
Above-mentioned vector offset state and data to be transmitted are corresponded, then corresponding information data is：
2. a kind of the system as claimed in claim 1, the multichannel recovery unit is used for the recovery of Q way from the signal after demodulation
It is believed that breath；It specifically includes：
M correlator output value of acquisition and its correspondence false noise coding identifier are subjected to data-inverse matching of vector screening,
From the L phase output values in M correlator, the modulation vector identification corresponding to r output valve of maximum absolute value is filtered out
Number and offset relationship it is vectorial as the joint transmitting that transmitting comes, wherein using vectorial identifier reckling as this reference vector,
The deviation post of his big identifier is subject to this reference vector, carries out the inverse matching of data-offset, obtains the Q ways of reception
It is believed that breath.
3. a kind of system as claimed in claim 2, the second multichannel converter unit is by the Q circuit-switched data information of reception through multichannel
It is converted to single channel, obtains Q bit informations.
It is described to be formed according to Data Matching algorithm from M false noise coding vector 4. a kind of system as claimed in claim 3
The r vector emitted is chosen in pseudo noise vector race is specially：
A1, the Q-bit data of transmitting is denoted as d1, d2, d3..., dQ, it is divided into three parts, is
d1, d2, d3..., dk={ d{s}, d{e}, d{p}}；
Wherein d{s}For
Wherein d{e}For
In formula,
Wherein d{p}For
K3=(r-1) [log in formula2L]；
A2、d{s}For r information, definition Binary Zero is positive phase, and binary one is minus phase, theData correspond to the 1st chosen
A vector phase, theA data correspond to the vectorial phase of r-th chosen, there is 2rKind possible state, corresponding informance data are r ratios
It is special；
A3, r vector is chosen from M vector, according to matching principle sorting with conventional combined in parallel modulation, hadKind
Possible state, corresponding informance data areBit；
A4, d{p}Position information is divided into r-1 groups, and every group is piPosition, according to piPosition deviates automatic adjusument reference vector i-th
VectorState carries out vector offset, hasKind possible state, corresponding informance data are (r-1)
[log2L] bit.
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| CN1791084A (en) * | 2004-12-17 | 2006-06-21 | 清华大学 | Time-domain synchronous OFDM space-frequency coding time-frequency combination channel estimating method |
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