CN106357585A - Signal sending method and device - Google Patents
Signal sending method and device Download PDFInfo
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- CN106357585A CN106357585A CN201610806323.9A CN201610806323A CN106357585A CN 106357585 A CN106357585 A CN 106357585A CN 201610806323 A CN201610806323 A CN 201610806323A CN 106357585 A CN106357585 A CN 106357585A
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- complex signal
- signal
- survivor path
- state
- path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
Abstract
The embodiment of the invention discloses a signal sending method and a signal sending device, which are applied to an emitter of a FBMC-OQAM communication system. The method comprises steps of classifying every plural signal in a to-be-transmitted signal group containing M plural signals into V data blocks; according to the pre-stored W phase position rotating factors and V data blocks of every plural signal, confirming the WV type state of every plural signal; specific to the WV state of every plural signal, determining the WV survival paths between M plural signals by applying a grid state path; determining an optimal survival path from the determined WV survival paths; determining a phase position rotating factor corresponding to the optimal survival path; modulating the to-be-transmitted signal group by the determined phase position rotating factor; sending the to-be-transmitted signal group after being modulated. The application of the embodiment can improve the inhibiting effect of PAPR (peak to average power ratio).
Description
Technical field
The present invention relates to wireless communication technology field, particularly to a kind of signaling method and device.
Background technology
In recent years, fbmc-oqam (filter bank multicarrier with offset quadrature
Amplitude modulation, filter bank multi-carrier Offset Quadrature Amplitude is modulated) attract everybody extensive concern.With list
Carrier system is different, and fbmc-oqam has higher papr (peak-to-average power ratio peak-to-average power
Ratio is also known as peak-to-average power ratio, peak-to-average force ratio).In general, the dynamic range of the power amplifier in fbmc-oqam communication system
It is all limited, so the higher signal of peak-to-average force ratio easily ingoing power amplifier nonlinearity region, lead to signal to produce non-
Linear distortion, causes the higher bit error rate, leads to communication quality to decline.In order to avoid communication quality declines, power amplifier needs
To work in the state of high-power compensation, to lead to transmission power to become big, greatly improve the cost of transmitter.Therefore suppression peak is equal
The performance comparing the whole fbmc-oqam communication system of raising has very important significance.Wherein, papr refers to the peak power of signal
Ratio with mean power.
At present, mainly application is based on pts (partial transmit sequences, partial transmission sequence method) method
Peak-to-average force ratio in suppression fbmc-oqam.Suppress the main process of the peak-to-average force ratio in fbmc-oqam communication system based on pts method
For: each fbmc-oqam complex signal is cut into v data block, w phase place having according to system transmitting terminal
The factor, obtains the w for each complex signalvThe state of kind, further according to wvPlant the corresponding phase rotation coefficient of state to complex signal
It is modulated, in four carrier cycles, then calculate the w modulating outvThe minima of the corresponding peak-to-average force ratio of individual signal, then determine
Go out optimum phase twiddle factor, using optimum phase twiddle factor, signal is modulated, send the signal after modulation, Jin Erda
Arrive the purpose of suppression signal peak-to-average ratio.Wherein, state refers to carry out phase using w phase rotation coefficient to v sub-block
A kind of possible compound mode of position rotation.
But, the method for above-mentioned suppression peak-to-average force ratio does not account for the repeatability of fbmc-oqam complex signal, leads to suppression letter
The effect on driving birds is not good of number peak-to-average force ratio.
Content of the invention
The purpose of the embodiment of the present invention is to provide a kind of signaling method and device, is imitated with the suppression improving peak-to-average force ratio
Really.
For reaching above-mentioned purpose, embodiments provide a kind of signaling method, be applied to fbmc-oqam communication
The transmitter of system；Methods described includes:
It is divided into v data block by comprising each of the signal group to be transmitted of m complex signal complex signal；
According to v data block of the w phase rotation coefficient prestoring and each complex signal described, determine institute
State the w of each complex signalvThe state of kind；
W for described each complex signalvThe state of kind, determines described m complex signal using trellis states could path method
Between wvBar survivor path；
W from described determinationvOptimum survivor path is determined in bar survivor path；
Determine and the described optimum corresponding phase rotation coefficient of survivor path；
Using determined phase rotation coefficient, described signal group to be transmitted is modulated；
Send the signal group to be transmitted after ovennodulation.
Preferably, the described w for described each complex signalvThe state of kind, determines described m using trellis states could path method
W between individual complex signalvBar survivor path, comprising:
According to the w for described each complex signalvThe state of kind, sets up the grid for described m complex signal, its
In, described grid has m row, each shows wvOK, a kind of state of every one complex signal of a line record in every string；
Successively by the state of every a line record of first row, it is defined as dbjective state；
For dbjective state, determine the w when between the corresponding complex signal in prostatitis to the corresponding complex signal of next columnvStrip
Path；
According to described wvThe routine weight value of paths, from described wvDetermine paths as when prostatitis pair in paths
The complex signal answered is to the sub- survivor path between the corresponding complex signal of next column；
Corresponding for described sub- survivor path next column is defined as working as prostatitis, by corresponding for described sub- survivor path next column
Corresponding state is defined as dbjective state, and return is described to be directed to dbjective state, determines when the corresponding complex signal in prostatitis is to next
Arrange the w between corresponding complex signalvPaths continue executing with, until determined be currently classified as described grid last
Row；
According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
Preferably, described according to described wvThe routine weight value of paths, from described wvDetermine in paths that paths are made
It is the sub- survivor path when between the corresponding complex signal in prostatitis to the corresponding complex signal of next column, comprising:
Entered according to the corresponding phase rotation coefficient of described current state described complex signal corresponding to described current state
Line phase rotates；And according to described next column wvThe corresponding phase rotation coefficient of individual state plural number corresponding to described next column letter
Number carry out phase place；
Modulate the corresponding described complex signal of described current state through phase place and next column wvIndividual state corresponds to
Complex signal, obtain wvSignal after individual modulation；
Using formulaDetermine described wvSignal after individual modulation
Peak-to-average force ratio, wherein,
paprs(k)For the signal peak-to-average ratio after each modulation；t0∈[t,4t]；For described each modulation
Signal corresponding d section output signal afterwards is in dt0Arrive (d+1) t0Peak power in four carrier cycles；e[|s(k)|2] be
Described wvThe mean power of the signal after individual modulation；M is the quantity of the complex signal comprising in described signal group to be transmitted；K is
Oversample factor；
According to described wvThe peak-to-average force ratio of the signal after individual modulation, using formulaDetermine described
wvThe routine weight value of individual subpath, wherein,
For described wvThe routine weight value of individual subpath；For routine weight value solved function；I, j=
0,1,…,wv-1；
The minimum subpath of routine weight value is defined as sub- survivor path.
Preferably, the described w from described determinationvOptimum survivor path is determined in bar survivor path, comprising:
According to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines described wvEvery in bar
The routine weight value of one survivor path；
Determine that the minimum survivor path of routine weight value is optimum survivor path.
Preferably, methods described also includes:
Send and the described optimum corresponding phase rotation coefficient of survivor path.
For achieving the above object, the embodiment of the present invention additionally provides a kind of sender unit, is applied to fbmc-oqam and leads to
The transmitter of letter system；Described device includes: division module, the first determining module, the second determining module, the 3rd determining module,
4th determining module, modulation module and the first sending module, wherein,
Described division module, for drawing comprising each of the signal group to be transmitted of m complex signal complex signal
It is divided into v data block；
Described first determining module, for according to the w phase rotation coefficient prestoring and each plural number described
V data block of signal, determines the w of described each complex signalvThe state of kind；
Described second determining module, for the w for described each complex signalvThe state of kind, using trellis states could path
Method determines the w between described m complex signalvBar survivor path；
Described 3rd determining module, for the w from described determinationvOptimum survivor path is determined in bar survivor path；
Described 4th determining module, for determining and the described optimum corresponding phase rotation coefficient of survivor path；
Described modulation module, for being modulated to described signal group to be transmitted using determined phase rotation coefficient；
Described first sending module, for sending the signal group to be transmitted after ovennodulation.
Preferably, described second determining module, specifically for:
According to the w for described each complex signalvThe state of kind, sets up the grid for described m complex signal, its
In, described grid has m row, each shows wvOK, a kind of state of every one complex signal of a line record in every string；
Successively by the state of every a line record of first row, it is defined as dbjective state；
For dbjective state, determine the w when between the corresponding complex signal in prostatitis to the corresponding complex signal of next columnvStrip
Path；
According to described wvThe routine weight value of paths, from described wvDetermine paths as when prostatitis pair in paths
The complex signal answered is to the sub- survivor path between the corresponding complex signal of next column；
Corresponding for described sub- survivor path next column is defined as working as prostatitis, by corresponding for described sub- survivor path next column
Corresponding state is defined as dbjective state, and return is described to be directed to dbjective state, determines when the corresponding complex signal in prostatitis is to next
Arrange the w between corresponding complex signalvPaths continue executing with, until determined be currently classified as described grid last
Row；
According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
Preferably, described according to described wvThe routine weight value of paths, from described wvDetermine in paths that paths are made
It is the sub- survivor path when between the corresponding complex signal in prostatitis to the corresponding complex signal of next column, comprising:
Entered according to the corresponding phase rotation coefficient of described current state described complex signal corresponding to described current state
Line phase rotates；And according to described next column wvThe corresponding phase rotation coefficient of individual state plural number corresponding to described next column letter
Number carry out phase place；
Modulate the corresponding described complex signal of described current state through phase place and next column wvIndividual state corresponds to
Complex signal, obtain wvSignal after individual modulation；
Using formulaDetermine described wvSignal after individual modulation
Peak-to-average force ratio, wherein,
paprs(k)For the signal peak-to-average ratio after each modulation；t0∈[t,4t]；For described each modulation
Signal corresponding d section output signal afterwards is in dt0Arrive (d+1) t0Peak power in four carrier cycles；e[s|(k)|2] be
Described wvThe mean power of the signal after individual modulation；M is the quantity of the complex signal comprising in described signal group to be transmitted；K is
Oversample factor；
According to described wvThe peak-to-average force ratio of the signal after individual modulation, using formulaDetermine described
wvThe routine weight value of individual subpath, wherein,
For described wvThe routine weight value of individual subpath；For routine weight value solved function；I, j=
0,1,…,wv-1；
The minimum subpath of routine weight value is defined as sub- survivor path.
Preferably, described 3rd determining module, specifically for:
According to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines described wvEvery in bar
The routine weight value of one survivor path；
Determine that the minimum survivor path of routine weight value is optimum survivor path.
Preferably, described device also includes: the second sending module, send and revolve with the described optimum corresponding phase place of survivor path
Transposon.
Embodiments provide a kind of signal method and device, be applied to the transmitting terminal of fbmc-oqam communication system；
Methods described includes: is divided into v data by comprising each of the signal group to be transmitted of m complex signal complex signal
Block；According to v data block of the w phase rotation coefficient prestoring and each complex signal described, determine described every
The w of one complex signalvThe state of kind；W for described each complex signalvThe state of kind, is determined described using trellis states could path method
W between m complex signalvBar survivor path；Using back trace technique, from the w of described determinationvOptimum good fortune is determined in bar survivor path
Deposit path；Determine and the described optimum corresponding phase rotation coefficient of survivor path；Using determined phase rotation coefficient to described
Signal group to be transmitted is modulated；Send the signal group to be transmitted after ovennodulation.
The application embodiment of the present invention, using trellis states could path method, according to adjacent complex signal in front and back to current plural number letter
Number impact, determine the optimum survivor path for signal group to be transmitted, and then determine the corresponding phase of optimum survivor path
Position twiddle factor, is only optimized to the phase rotation coefficient vector of single complex signal than in prior art, improves letter
The inhibition of number peak-to-average force ratio.
Certainly, implement arbitrary product of the present invention or method must be not necessarily required to reach simultaneously all the above excellent
Point.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of journey schematic diagram of signaling method stream provided in an embodiment of the present invention；
Fig. 2 is the comparison diagram that prior art and the embodiment of the present invention are carried out emulate with the suppression papr effect obtaining；
Fig. 3 is the schematic flow sheet of another kind signaling method provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of sender unit provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another kind sender unit provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
For solving prior art problem, embodiments provide a kind of signaling method and device, first below
Just a kind of a kind of signaling method provided in an embodiment of the present invention illustrates.
It should be noted that the real-time example of the present invention is applied to the transmitter of fbmc-oqam communication system.
Fig. 1 is a kind of journey schematic diagram of signaling method stream provided in an embodiment of the present invention, may include that
S101: be divided into v data by comprising each of the signal group to be transmitted of m complex signal complex signal
Block.
Specific it is assumed that it is d that the transmitter of fbmc-oqam communication system needs the signal group to be transmitted of transmitting, and d be by
M dmComposition, each dmIt is modulated onto on n subcarrier.
Transmitter is by each dmIt is cut into v data block, the cutting method of data block is prior art, no longer superfluous here
State.Transmitter can be by m dmRespectively etc. it is cut into v data block, wherein, v can be less than or equal to n.
It should be noted that, the value of v is to be determined according to the numerical value that user sets.Under normal circumstances, the value of v is generally
2 power side, such as 23(8)、26Etc. or the numerical value such as 3,12 (64).
In actual applications it is assumed that comprising 3 complex signal d in signal group to be transmitted1、d2And d3, transmitter is by each again
Number signal is divided into 3 data blocks.
S102: according to v data block of the w phase rotation coefficient prestoring and each complex signal described,
Determine the w of described each complex signalvThe state of kind.
Specifically, with d1As a example s102 is illustrated.
Assume cutting d1The data block obtaining is v1、v2、v3.
d1In v1One of 3 phase rotation coefficients that data block can prestore according to transmitter enter line phase
Rotation, combination now has 3 kinds；In v1In the case that data block determines phase rotation coefficient, v2Data block can according to send out
One of 3 phase rotation coefficients that the machine of penetrating prestores carry out phase place, and combination now has 9 kinds, with such
Push away, according to d1In 3 data blocks and the combination that determines of 3 phase rotation coefficients have 27 kinds.
Under normal circumstances, we have v data block in complex signal one kind during one phase rotation coefficient
Compound mode is referred to as a kind of state.
By that analogy, each of signal group to be transmitted complex signal all has 33=27 kinds of states.
S103: for the w of described each complex signalvThe state of kind, determines described m plural number using trellis states could path method
W between signalvBar survivor path.
Specifically, can be according to the w for described each complex signalvThe state of kind, sets up and is directed to described m complex signal
Grid, wherein, described grid has m row, each shows wvOK, of every one complex signal of a line record in every string
The state of kind；Successively by the state of every a line record of first row, it is defined as dbjective state；For dbjective state, determine and work as prostatitis
Corresponding complex signal is to the w between the corresponding complex signal of next columnvSingle sub path；According to described wvThe routine weight value of paths,
From described wvDetermine paths as when the corresponding complex signal in prostatitis is to the corresponding complex signal of next column in paths
Between sub- survivor path；Corresponding for described sub- survivor path next column is defined as working as prostatitis, described sub- survivor path is corresponded to
The corresponding state of next column be defined as dbjective state, return described be directed to dbjective state, determine when prostatitis corresponding plural number letter
Number to the w between the corresponding complex signal of next columnvPaths continue executing with, until that is determined is currently classified as described grid
Last string；According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
Specifically, can be corresponding to described dbjective state described multiple according to the corresponding phase rotation coefficient of described dbjective state
Number signal carries out phase place；And according to described next column wvThe corresponding phase rotation coefficient of individual state is corresponding to described next column multiple
Number signal carries out phase place；Modulate the corresponding described complex signal of described current state through phase place and next column wvIndividual shape
The corresponding complex signal of state, obtains wvSignal after individual modulation；Using formula
Determine described wvThe peak-to-average force ratio of the signal after individual modulation, wherein, paprs(k)For the signal peak-to-average ratio after each modulation；t0∈
[t,4t]；For the signal corresponding d section output signal after described each modulation in dt0Arrive (d+1) t0Four
Peak power in carrier cycle；e[|s(k)|2] it is described wvThe mean power of the signal after individual modulation；M is described to be transmitted
The quantity of the complex signal comprising in signal group；K is oversample factor；According to described wvThe peak-to-average force ratio of the signal after individual modulation,
Using formulaDetermine described wvThe routine weight value of individual subpath, wherein,For described wv
The routine weight value of individual subpath；For routine weight value solved function；I, j=0,1 ..., wv-1；By routine weight value
Little subpath is defined as sub- survivor path.
In actual applications, for 27 kinds of states of each complex signal, set up grid, wherein, grid has 27 row,
3 row.
The order that the order of the row in grid is listed in signal group to be transmitted with this is corresponding: in signal group to be transmitted
First row in first complex signal correspondence grid, the secondary series in second complex signal correspondence grid, the 3rd plural number
The 3rd row in the corresponding grid of signal.
Assume, from the beginning of the state of the first row record of first row, this state to be defined as dbjective state.
Determine that dbjective state arrives 27 paths of each state of secondary series record.
Assume that dbjective state is v with the corresponding relation of phase rotation coefficient1Corresponding a, v2Corresponding b, v3Corresponding c.According to phase place
Twiddle factor (a, b, c) carries out phase place, and corresponding 27 of 27 states according to secondary series to first complex signal
Phase rotation coefficient carries out phase place to second complex signal respectively.
Modulation phase-rotated after the first complex signal and phase-rotated after the second complex signal, obtain 27 tune
Signal after system.
Using formulaDetermine that the peak of the signal after 27 modulation is equal
Ratio obtains 27 peak-to-average force ratios, wherein, a peak-to-average force ratio corresponds to dbjective state in 27 paths of each state of secondary series record
A subpath.
Recycle formulaDetermine the routine weight value of 27 subpaths.
The minimum subpath of corresponding routine weight value is defined as sub- survivor path.Assume to determine that outbound path x is that son is survived
Path.
Can also be according to formulaDetermine minimal path weights, further according to determination
The minimal path weights going out determine sub- survivor path, and wherein, χ (j, m) is minimal path weights and the current path of subpath
Routine weight value sum；For minima value finding function；sm(i,m)Routine weight value for current path；For son
The routine weight value in path；I is the number of state indexes of dbjective state；J is the number of state indexes of the state of next column record.In addition, it is current
Path is the path of the corresponding statess of first row to dbjective state.
In actual applications, during the dbjective state of determination first row is to the sub- survivor path of secondary series, sm(i,m)For
To the routine weight value of dbjective state, this routine weight value is zero to the state of the first row record of string,For 27 subpaths
Routine weight value is it is assumed that according to formulaDetermine subpath x routine weight value be 27 roads
Minima in the weights of footpath, then by subpath x be sub- survivor path.Formula can be utilized
Determine the routine weight value of described current path, wherein, sm(j,m+1)For first row corresponding statess to next column corresponding statess road
Footpath weights；sm(χ(j,m),m)For first row corresponding statess to dbjective state routine weight value；For sub- survivor path
Routine weight value.
Secondary series is defined as working as prostatitis, state corresponding with sub- survivor path x in secondary series is defined as dbjective state.
Determine that dbjective state arrives the sub- survivor path y of tertial each state again.Because the 3rd is classified as in grid
String afterwards, in no longer arranging the 3rd, state corresponding with sub- survivor path y is defined as dbjective state.
According to two strip survivor path x and y determining, generate a survivor path a between three complex signals.
According to the method described above, determine the survivor path for the state of other row records in first row.
It may be determined that going out 27 survivor paths after the completion of s103 execution.
The process determining the survivor path of the state for first row each row record can execute it is also possible to different simultaneously
Shi Zhihang.
S104: from the w of described determinationvOptimum survivor path is determined in bar survivor path.
Specifically, can be according to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines
Described wvThe routine weight value of each survivor path in bar；Determine that the minimum survivor path of routine weight value is optimum survivor path.
In actual applications, the road of survivor path a can be determined according to corresponding sub- survivor path x and y of survivor path a
Footpath weights.Assume that the routine weight value determining a is 4.Method according to this, determines the routine weight value of other 26 survivor paths.
In actual applications, back trace technique can also be utilized, according to formulaDetermine
The minimum survivor path of routine weight value, wherein,
X=m-1, m-3 ..., 1,0；Index (m-1) is minimal path weights；For minimal path power
Value solved function；χ (index (x), x+1) is the routine weight value solved function of each survivor path.
The routine weight value of hypothesis survivor path a is the minima in 27 routine weight values, and survivor path a is defined as optimum
Survivor path.
S105: determine and the described optimum corresponding phase rotation coefficient of survivor path.
Assume the corresponding phase rotation coefficient of three states corresponding with survivor path a be (a, b, c), (b, a, c), (c,
B, a).
S106: described signal group to be transmitted is modulated using determined phase rotation coefficient.
According to phase rotation coefficient (a, b, c), (b, a, c), (c, b a) treat 3 plural numbers in transmission signal group d respectively
Signal is modulated.
Under normal circumstances, can according to phase rotation coefficient (a, b, c), (b, a, c), (c, b, a) respectively to letter to be transmitted
3 complex signals in number group d carry out phase place, then carry out fbmc modulation；3 in transmission signal group d can also first be treated
Individual complex signal carries out fbmc modulation, further according to phase rotation coefficient (a, b, c), (b, a, c), (c, b, a) respectively to be transmitted
3 complex signals in signal group d carry out phase place.
Treat transmission signal group according to phase rotation coefficient to carry out phase place and be modulated to prior art, no longer superfluous here
State.
S107: send the signal group to be transmitted after ovennodulation.
Send signal group d to be transmitted after modulation.
Signal group d to be transmitted after modulation is sent as prior art, repeats no more here.
In addition, according to above-mentioned scene, being simulated to signaling method provided in an embodiment of the present invention.
Simulation parameter is as follows:
Fbmc-oqam system adopts 4oqam to modulate, sub-carrier number n=64, phase rotation coefficient number w=2, and phase place is revolved
TransposonEmulation describes papr with complementary Cumulative Distribution Function value.
Fig. 2 is the comparison diagram that prior art and the embodiment of the present invention are carried out emulate with the suppression papr effect obtaining, wherein,
Transverse axis represents the decibels of peak-to-average force ratio, and the longitudinal axis represents corresponding CCDF value, and pts represents and utilizes prior art
Pts method carries out the effect curve of papr suppression；Tb-pts represents that the application embodiment of the present invention carries out the effect song of papr suppression
Line.
Under normal circumstances, under the same conditions, the number dividing the data block that a complex signal obtains is more, to papr
Inhibition better.
From Figure 2 it can be seen that when a complex signal is divided into 4 sub-blocks, CCDF value declines
To 10-3, the peak-to-average force ratio that the application embodiment of the present invention obtains is 6.8db.And a complex signal is divided into 8 sub-blocks
When, the peak-to-average force ratio that application prior art pts method obtains is 9.4db.The application embodiment of the present invention can peak in v=4 equal
Frequently the peak-to-average force ratio in v=8 for the application prior art reduces 9.4-6.8=2.6db, and the therefore application embodiment of the present invention can be real
Now more preferable peak-to-average force ratio inhibition.
Apply embodiment illustrated in fig. 1 of the present invention, using trellis states could path method, according to adjacent complex signal in front and back to current
The impact of complex signal, determines the optimum survivor path for signal group to be transmitted, and then determines optimum survivor path pair
The phase rotation coefficient answered, is only optimized to the phase rotation coefficient vector of single complex signal than in prior art, carries
The high inhibition of signal peak-to-average ratio.
In the case of application pts method, for each complex signal, there is wvPlant phase rotation coefficient, therefore for tool
For having the sequence to be transmitted of m complex signal, total wmvThe combination of individual phase rotation coefficient, therefore application pts method obtains
The computation complexity of excellent phase rotation coefficient is o (wmv).
Apply embodiment illustrated in fig. 1 of the present invention, for each complex signal, have wvPlant phase rotation coefficient, solving
During sub- survivor path, w is combined as the phase rotation coefficient when prostatitis to next column2vKind, for having m complex signal
Sequence to be transmitted for, the quantity of combination is mw2v, then the calculating of application embodiment of the present invention acquisition optimum angle twiddle factor
Complexity is o (mw2v).
Obviously, when m is more than or equal to 1, o (wmv) it is more than o (mw2v) it is generally the case that incessantly wrapping in signal group to be transmitted
Containing a complex signal, during therefore applying embodiment illustrated in fig. 1 of the present invention can reduce acquisition optimum angle twiddle factor
Computation complexity.
Fig. 3 is the schematic flow sheet of another kind signaling method provided in an embodiment of the present invention.
Embodiment illustrated in fig. 3 of the present invention increased s108 on the basis of embodiment illustrated in fig. 1: sends and described optimum good fortune
Deposit the corresponding phase rotation coefficient in path.
Specifically, can by phase rotation coefficient (a, b, c), (b, a, c), (c, b, a) as modulation after letter to be transmitted
Number group d side information send it is also possible to by phase rotation coefficient (a, b, c), (b, a, c), (c, b, a) with modulate after to be passed
Defeated signal group d separately send.
Apply embodiment illustrated in fig. 3 of the present invention, can make the receiving terminal of fbmc-oqam communication system according to phase place because
Son is demodulated to signal to receive.
Corresponding with said method embodiment, the embodiment of the present invention additionally provides a kind of sender unit, is applied to
The transmitter of fbmc-oqam communication system.
Fig. 4 is a kind of structural representation of sender unit provided in an embodiment of the present invention, may include that division module
401st, the first determining module 402, the second determining module 403, the 3rd determining module 403, the 4th determining module 404, modulation module
405 and first sending module 406, wherein,
Described division module 401, for comprising each of the signal group to be transmitted of m complex signal complex signal
It is divided into v data block.
Described first determining module 402, for according to w phase rotation coefficient prestoring and described each answer
V data block of number signal, determines the w of described each complex signalvThe state of kind.
Described second determining module 403, for the w for described each complex signalvThe state of kind, using trellis states could road
Shot determines the w between described m complex signalvBar survivor path.
In actual applications, the second determining module 403, specifically can be used for:
According to the w for described each complex signalvThe state of kind, sets up the grid for described m complex signal, its
In, described grid has m row, each shows wvOK, a kind of state of every one complex signal of a line record in every string；
Successively by the state of every a line record of first row, it is defined as dbjective state；
For dbjective state, determine the w when between the corresponding complex signal in prostatitis to the corresponding complex signal of next columnvBar road
Footpath；
According to described wvThe routine weight value of paths, from described wvDetermine paths as when prostatitis pair in paths
The complex signal answered is to the sub- survivor path between the corresponding complex signal of next column；
Corresponding for described sub- survivor path next column is defined as working as prostatitis, by corresponding for described sub- survivor path next column
Corresponding state is defined as dbjective state, and return is described to be directed to dbjective state, determines when the corresponding complex signal in prostatitis is to next
Arrange the w between corresponding complex signalvPaths continue executing with, until determined be currently classified as described grid last
Row；
According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
Specifically, described according to described wvThe routine weight value of paths, from described wvDetermine in paths that paths are made
It is the sub- survivor path when between the corresponding complex signal in prostatitis to the corresponding complex signal of next column, may include that
Entered according to the corresponding phase rotation coefficient of described current state described complex signal corresponding to described current state
Line phase rotates；And according to described next column wvThe corresponding phase rotation coefficient of individual state plural number corresponding to described next column letter
Number carry out phase place；
Modulate the corresponding described complex signal of described current state through phase place and next column wvIndividual state corresponds to
Complex signal, obtain wvSignal after individual modulation；
Using formulaDetermine described wvSignal after individual modulation
Peak-to-average force ratio, wherein,
paprs(k)For the signal peak-to-average ratio after each modulation；t0∈[t,4t]；For described each modulation
Signal corresponding d section output signal afterwards is in dt0Arrive (d+1) t0Peak power in four carrier cycles；e[|s(k)|2] be
Described wvThe mean power of the signal after individual modulation；M is the quantity of the complex signal comprising in described signal group to be transmitted；K is
Oversample factor；
According to described wvThe peak-to-average force ratio of the signal after individual modulation, using formulaDetermine described
wvThe routine weight value of individual subpath, wherein,
For described wvThe routine weight value of individual subpath；For routine weight value solved function；I, j=
0,1,…,wv-1；
The minimum subpath of routine weight value is defined as sub- survivor path.
Described 3rd determining module 404, for the w from described determinationvOptimum survivor path is determined in bar survivor path.
In actual applications, the 3rd determining module 404, specifically for:
According to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines described wvEvery in bar
The routine weight value of one survivor path；
Determine that the minimum survivor path of routine weight value is optimum survivor path.
Described 4th determining module 405, for determining and the described optimum corresponding phase rotation coefficient of survivor path.
Described modulation module 406, for being modulated to described signal group to be transmitted using determined phase rotation coefficient.
Described first sending module 407, for sending the signal group to be transmitted after ovennodulation.
Apply embodiment illustrated in fig. 4 of the present invention, using trellis states could path method, according to adjacent complex signal in front and back to current
The impact of complex signal, determines the optimum survivor path for signal group to be transmitted, and then determines optimum survivor path pair
The phase rotation coefficient answered, is only optimized to the phase rotation coefficient vector of single complex signal than in prior art, carries
The high inhibition of signal peak-to-average ratio.
In the case of application pts method, for each complex signal, there is wvPlant phase rotation coefficient, therefore for tool
For having the sequence to be transmitted of m complex signal, total wmvThe combination of individual phase rotation coefficient, therefore application pts method obtains
The computation complexity of excellent phase rotation coefficient is o (wmv).
Apply embodiment illustrated in fig. 4 of the present invention, for each complex signal, have wvPlant phase rotation coefficient, solving
During sub- survivor path, w is combined as the phase rotation coefficient when prostatitis to next column2vKind, for having m complex signal
Sequence to be transmitted for, the quantity of combination is mw2v, then the calculating of application embodiment of the present invention acquisition optimum angle twiddle factor
Complexity is o (mw2v).
Obviously, o (wmv) it is more than o (mw2v), therefore application the embodiment of the present invention can reduce acquisition optimum angle rotation because
Computation complexity in subprocess.
Fig. 5 is the structural representation of another kind sender unit provided in an embodiment of the present invention.Embodiment illustrated in fig. 5 exists
On the basis of embodiment illustrated in fig. 4, increased the second sending module 408, corresponding with described optimum survivor path for sending
Phase rotation coefficient.
Apply embodiment illustrated in fig. 5 of the present invention, can make the receiving terminal of fbmc-oqam communication system according to phase place because
Son is demodulated to signal to receive.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to
Comprising of nonexcludability, wants so that including a series of process of key elements, method, article or equipment and not only including those
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element that limited by sentence "including a ..." it is not excluded that
Also there is other identical element including in the process of described key element, method, article or equipment.
Each embodiment in this specification is all described by the way of related, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Real especially for device
For applying example, because it is substantially similar to embodiment of the method, so description is fairly simple, referring to embodiment of the method in place of correlation
Part illustrate.
One of ordinary skill in the art will appreciate that realizing all or part of step in said method embodiment is can
Completed with the hardware instructing correlation by program, described program can be stored in computer read/write memory medium,
The storage medium obtaining designated herein, such as: rom/ram, magnetic disc, CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All
Any modification, equivalent substitution and improvement made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
Interior.
Claims (10)
1. a kind of signaling method is it is characterised in that be applied to the transmitter of fbmc-oqam communication system；Methods described bag
Include:
It is divided into v data block by comprising each of the signal group to be transmitted of m complex signal complex signal；
According to v data block of the w phase rotation coefficient prestoring and each complex signal described, determine described every
The w of one complex signalvThe state of kind；
W for described each complex signalvThe state of kind, determines the w between described m complex signal using trellis states could path methodv
Bar survivor path；
W from described determinationvOptimum survivor path is determined in bar survivor path；
Determine and the described optimum corresponding phase rotation coefficient of survivor path；
Using determined phase rotation coefficient, described signal group to be transmitted is modulated；
Send the signal group to be transmitted after ovennodulation.
2. method according to claim 1 is it is characterised in that the described w for described each complex signalvThe state of kind, adopts
Determine the w between described m complex signal with trellis states could path methodvBar survivor path, comprising:
According to the w for described each complex signalvThe state of kind, sets up the grid for described m complex signal, wherein, described
Grid has m row, each shows wvOK, a kind of state of every one complex signal of a line record in every string；
Successively by the state of every a line record of first row, it is defined as dbjective state；
For dbjective state, determine the w when between the corresponding complex signal in prostatitis to the corresponding complex signal of next columnvSingle sub path；
According to described wvThe routine weight value of paths, from described wvDetermine in paths paths as when prostatitis corresponding
Complex signal is to the sub- survivor path between the corresponding complex signal of next column；
Corresponding for described sub- survivor path next column is defined as working as prostatitis, corresponding for described sub- survivor path next column is corresponded to
State be defined as dbjective state, return described be directed to dbjective state, determine when the corresponding complex signal in prostatitis is to next column pair
W between the complex signal answeredvPaths continue executing with, until the last string being currently classified as described grid determined；
According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
3. method according to claim 2 it is characterised in that described according to described wvThe routine weight value of paths, from described
wvDetermine paths as the son when between the corresponding complex signal in prostatitis to the corresponding complex signal of next column in paths
Survivor path, comprising:
Phase is carried out according to the corresponding phase rotation coefficient of described current state described complex signal corresponding to described current state
Position rotation；
According to described next column wvTo described next column, corresponding complex signal enters line phase to the corresponding phase rotation coefficient of individual state
Rotation；
Modulate the corresponding described complex signal of described current state through phase place and next column wvThe corresponding plural number of individual state
Signal, obtains wvSignal after individual modulation；
Using formulaDetermine described wvThe peak of the signal after individual modulation
All than, wherein,
paprs(k)For the signal peak-to-average ratio after each modulation；t0∈[t,4t]；After described each modulation
Signal corresponding d section output signal is in dt0Arrive (d+1) t0Peak power in four carrier cycles；e[|s(k)|2] it is described
wvThe mean power of the signal after individual modulation；M is the quantity of the complex signal comprising in described signal group to be transmitted；K was to adopt
Like factor；
According to described wvThe peak-to-average force ratio of the signal after individual modulation, using formulaDetermine described wvIndividual
The routine weight value of subpath, wherein,
For described wvThe routine weight value of individual subpath；For routine weight value solved function；I, j=0,
1,…,wv-1；
The minimum subpath of routine weight value is defined as sub- survivor path.
4. method according to claim 3 is it is characterised in that the described w from described determinationvDetermine in bar survivor path
Excellent survivor path, comprising:
According to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines described wvEach good fortune in bar
Deposit the routine weight value in path；
Determine that the minimum survivor path of routine weight value is optimum survivor path.
5. method according to claim 1 is it is characterised in that methods described also includes:
Send and the described optimum corresponding phase rotation coefficient of survivor path.
6. a kind of sender unit is it is characterised in that be applied to the transmitter of fbmc-oqam communication system；Described device bag
Include: division module, the first determining module, the second determining module, the 3rd determining module, the 4th determining module, modulation module and
One sending module, wherein,
Described division module, for being divided into v by comprising each of the signal group to be transmitted of m complex signal complex signal
Individual data block；
Described first determining module, for according to the w phase rotation coefficient prestoring and each complex signal described
V data block, determine the w of described each complex signalvThe state of kind；
Described second determining module, for the w for described each complex signalvThe state of kind, is determined using trellis states could path method
W between described m complex signalvBar survivor path；
Described 3rd determining module, for the w from described determinationvOptimum survivor path is determined in bar survivor path；
Described 4th determining module, for determining and the described optimum corresponding phase rotation coefficient of survivor path；
Described modulation module, for being modulated to described signal group to be transmitted using determined phase rotation coefficient；
Described first sending module, for sending the signal group to be transmitted after ovennodulation.
7. device according to claim 6 is it is characterised in that described second determining module, specifically for:
According to the w for described each complex signalvThe state of kind, sets up the grid for described m complex signal, wherein, described
Grid has m row, each shows wvOK, a kind of state of every one complex signal of a line record in every string；
Successively by the state of every a line record of first row, it is defined as dbjective state；
For dbjective state, determine the w when between the corresponding complex signal in prostatitis to the corresponding complex signal of next columnvSingle sub path；
According to described wvThe routine weight value of paths, from described wvDetermine in paths paths as when prostatitis corresponding
Complex signal is to the sub- survivor path between the corresponding complex signal of next column；
Corresponding for described sub- survivor path next column is defined as working as prostatitis, corresponding for described sub- survivor path next column is corresponded to
State be defined as dbjective state, return described be directed to dbjective state, determine when the corresponding complex signal in prostatitis is to next column pair
W between the complex signal answeredvPaths continue executing with, until the last string being currently classified as described grid determined；
According to the m-1 strip survivor path determined, generate a survivor path between described m complex signal.
8. device according to claim 7 it is characterised in that described according to described wvThe routine weight value of paths, from described
wvDetermine paths as the son when between the corresponding complex signal in prostatitis to the corresponding complex signal of next column in paths
Survivor path, comprising:
Phase is carried out according to the corresponding phase rotation coefficient of described current state described complex signal corresponding to described current state
Position rotation；And according to described next column wvTo described next column, corresponding complex signal enters the corresponding phase rotation coefficient of individual state
Line phase rotates；
Modulate the corresponding described complex signal of described current state through phase place and next column wvThe corresponding plural number of individual state
Signal, obtains wvSignal after individual modulation；
Using formulaDetermine described wvThe peak of the signal after individual modulation
All than, wherein,
paprs(k)For the signal peak-to-average ratio after each modulation；t0∈[t,4t]；After described each modulation
Signal corresponding d section output signal is in dt0Arrive (d+1) t0Peak power in four carrier cycles；e[|s(k)|2] it is described
wvThe mean power of the signal after individual modulation；M is the quantity of the complex signal comprising in described signal group to be transmitted；K was to adopt
Like factor；
According to described wvThe peak-to-average force ratio of the signal after individual modulation, using formulaDetermine described wvIndividual
The routine weight value of subpath, wherein,
For described wvThe routine weight value of individual subpath；For routine weight value solved function；I, j=0,
1,…,wv-1；
The minimum subpath of routine weight value is defined as sub- survivor path.
9. device according to claim 8 is it is characterised in that described 3rd determining module, specifically for:
According to wvIn bar, the routine weight value sum of the corresponding sub- survivor path of each survivor path, determines described wvEach good fortune in bar
Deposit the routine weight value in path；
Determine that the minimum survivor path of routine weight value is optimum survivor path.
10. device according to claim 6 is it is characterised in that described device also includes: the second sending module, for sending out
Send and the described optimum corresponding phase rotation coefficient of survivor path.
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| CN111200571A (en) * | 2018-11-19 | 2020-05-26 | 华为技术有限公司 | Signal transmission method and device |
| CN111200571B (en) * | 2018-11-19 | 2021-10-01 | 华为技术有限公司 | Signal transmission method and device |
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