CN101442348A - Method, apparatus, system for clipping signal and signal radiation system - Google Patents
Method, apparatus, system for clipping signal and signal radiation system Download PDFInfo
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- CN101442348A CN101442348A CN 200810240705 CN200810240705A CN101442348A CN 101442348 A CN101442348 A CN 101442348A CN 200810240705 CN200810240705 CN 200810240705 CN 200810240705 A CN200810240705 A CN 200810240705A CN 101442348 A CN101442348 A CN 101442348A
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- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
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- H04L27/26—Systems using multi-frequency codes
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- H04L27/2623—Reduction thereof by clipping
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Abstract
The invention discloses a signal clipping method, which comprises the following steps: sampling input signals, detecting out a maximal peak point signal over a preset threshold from the input signals, and making the sampling point signals using the maximal peak point signal as a center be the signals to be clipped; multiplying the maximal peak point signal with a preset clipping coefficient to obtain a clipping noise signal; and reversely stacking the clipping noise signal to the signals to be clipped to finish clipping treatment. The invention also discloses a signal clipping device, a system and a signal emitting system. The signal clipping method, the device, the system and the signal emitting system adopt once clipping treatment to achieve removal of the maximal peak point signal of the input signals, are simple in logical design, can achieve inhibit of peak-to-mean ratio signals under the condition of optimizing hardware resources, and further reduce pressure of a power amplifier on output power and efficiency.
Description
Technical field
The present invention relates to the signal processing technology of the communications field, relate in particular to a kind of signal clipping method, device, system and signal transmitting system.
Background technology
In communication technical field, the synthetic envelope of multi-carrier signal can cause the PAR (PeakAverage Ratio, peak-to-average force ratio) of signal very high.When the signal of high PAR passes through the base station power amplifier, for fear of distorted signals and spectral re-growth, the required power amplifier has the bigger range of linearity, signal after just power amplifier must amplify the signal with high PAR and send this amplification, like this, will inevitably reduce the power output of base station power amplifier, increase the pressure of power amplifier on efficient.So, in order to reduce the PAR of signal, and then increase the effective output of power amplifier and reduce power amplifier at the pressure that promotes on the efficient, handle (Crest FactorReduced is called for short slicing) to the prune CFR of peak value of signal waveform.
Existing clipping method mainly is: generate the clipped noise that stack needs after the initial noise process high-order bandpass filtering treatment that will extract from input signal, the input signal that again clipped noise oppositely superposeed is promptly finished slicing and is handled, and prior art needs to take a large amount of hardware resources in realization.
Summary of the invention
Embodiments of the invention provide a kind of signal clipping method, device, system and signal transmitting system, and its hardware resource with optimization is realized the inhibition to signal peak-to-average ratio.
A kind of signal clipping method comprises:
Input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, will be that the sampled point signal at center is as treating clipped signal with this maximal peak point signal;
Described maximal peak point signal and preset clipping coefficient multiplied each other obtain clipping noise signal;
The described clipped signal for the treatment of of the reverse stack of described clipping noise signal is finished slicing and handled.
A kind of signal clipping device comprises:
Treating the clipped signal unit, be used for input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, is that the sampled point signal at center is as treating clipped signal with this maximal peak point signal;
The clipping noise signal unit is used for that described maximal peak point signal be multiply by preset clipping coefficient and obtains clipping noise signal;
The slicing processing unit is used for the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is realized the slicing processing;
The parameter preset memory cell is used to store described default wave absorption coefficient, default thresholding.
A kind of signal wave elimination system comprises k signal clipping device that connects successively, wherein, k〉1.
A kind of signal transmitting system comprises: power amplifier and the signal clipping device that is connected with the input of described power amplifier, wherein, described signal clipping device connects successively for one or more.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, simple in its logical design, can under the situation of resource of optimizing hardware, realize inhibition, and then reduce the pressure of power amplifier on power output and efficient high peak-to-average force ratio signal.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the FB(flow block) of the embodiment of the invention one signal clipping method;
Fig. 2 is the FB(flow block) of embodiment of the invention binary signal clipping method;
Fig. 3 is the principle schematic of slicing formation in the embodiment of the invention binary signal clipping method;
Fig. 4 is the FB(flow block) of the embodiment of the invention three signal clipping method;
Fig. 5 is the structured flowchart of the embodiment of the invention four signal clipping devices;
Fig. 6 is the structured flowchart of the embodiment of the invention five signal clipping devices;
Fig. 7 is the principle schematic of the embodiment of the invention five signal clipping devices;
Fig. 8 is the structured flowchart of the embodiment of the invention six signal wave elimination systems;
Fig. 9 is the structured flowchart of the embodiment of the invention seven signal transmitting systems.
Embodiment
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: generally adopt as FPGA (Field Programmable Gate Array, field programmable gate array) etc. logical device carries out the filter hardware design, and the band pass filter of high-order generally all is a complex bandpass filters, wherein the number of times of multiply operation increases obviously, again in conjunction with high-order characteristic own, need to take a large amount of hardware resources in logical devices such as FPGA, realizing, therefore existing clipping method existence takies great amount of hardware resources and realizes more complicated, and is difficult for the defective of multistage expansion.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one
The FB(flow block) of signal clipping method as shown in Figure 1, present embodiment proposes a kind of signal clipping method, comprising:
Obtain treating the step 10 of clipped signal: input signal is sampled and therefrom detected surpasses the maximal peak point signal of presetting thresholding, to be that the sampled point signal at center is as treating clipped signal with this maximal peak point signal, can know, the peak point signal can be considered as surpassing the noise signal of default thresholding, finds a maximal peak point signal according to default thresholding here;
Obtain the step 20 of clipping noise signal: described maximal peak point signal and preset clipping coefficient are multiplied each other obtains clipping noise signal;
The step 30 that slicing is handled: the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is finished slicing and handled.
Input signal can close signal or single-carrier signal behind the road for multi-carrier signal in the above-mentioned signal clipping method.For single-carrier signal, its peak-to-average force ratio generally is not very high; If multi-carrier signal, the synthetic envelope of so much carrier signal can cause the peak-to-average force ratio of signal very high, so the signal clipping method of present embodiment especially is suitable for the multi-transceiver combination signal.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, the storage and the calculating operation that need carry out are less, simple and the FPGA resource occupation is more satisfactory in its logical design, can under the situation of resource of optimizing hardware, realize inhibition to high peak-to-average force ratio signal, and then the effective output of increase power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment two
Present embodiment proposes a kind of signal clipping method, comprise: the step 10 that obtains treating clipped signal: input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, will be that the sampled point signal at center is as treating clipped signal with this maximal peak point signal; Obtain the step 20 of clipping noise signal: described maximal peak point signal and preset clipping coefficient are multiplied each other obtains clipping noise signal; The step 30 that slicing is handled: the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is finished slicing and handled.
Particularly, as shown in Figure 2, at first, in obtaining treating the step 10 of clipped signal, comprise:
Sampling step 101: referring to the principle schematic of Fig. 3 slicing formation with signal flow to explaining, initial sampled point signal 1 is imported the slicing formation successively according to certain sampling rate, with n sampling number certificate is a frame, it is relevant that the choosing of n value surpasses the peak noise dot density size of presetting thresholding in main and signal peak-to-average ratio size and the signal, n 〉=1, n in the embodiment of the invention 〉=32, the slicing formation has four frame sampling point data at least, as head of the queue frame 3n:4n-1, tail of the queue frame 0:n-1 and middle two frame n:2n-1---2n:3n-1, in the slicing formation, two frame n:2n-1---2n:3n-1 is two a frame 2n sampling number certificate altogether in the middle of it, and it is for seeking the zone of maximal peak point signal;
The step 102 of inquiry maximal peak point signal: find out a maximal peak point signal that surpasses default thresholding two frame n:2n-1 in the middle of the slicing formation---the centre two frame sampling point signals 2 of 2n sampling number of 3n-1 according to correspondence;
The step 103 of clipped signal is treated in acquisition: will be the symmetrical 2n in a center sampled point signal (not comprising this maximal peak point signal itself) with this maximal peak point signal treats clipped signal 5 as what this slicing was handled, referring to Fig. 3, may there be such situation, this maximal peak point signal is middle two frame n:2n-1---the center sampling point data corresponding sampling points signal of 3n-1 of slicing formation not necessarily, be that the symmetrical 2n in a center sampled point signal may comprise some sampling number among head of the queue frame 3n:4n-1 or the tail of the queue frame 0:n-1 according to the corresponding sampling points signal with this maximal peak point signal so, so, described slicing formation has four frame sampling point signals at least, and signal spectrum is undistorted during with the assurance slicing.
Then, in the step 20 that obtains clipping noise signal: preset clipping coefficient multiplied each other with described maximal peak point signal successively obtains clipping noise signal.Preset clipping coefficient can generate according to the spectral characteristic of input signal or be default according to empirical value, and its major function is to guarantee that the frequency spectrum of clipping noise signal is undistorted.Treat that clipped signal is a 2n sampled point signal, preferably, the number of preset clipping coefficient can be≤2n, optimizes the utilization of resources.
At last, comprise in the step 30 that slicing is handled:
The step 301 of time delay processing: described delaying with described clipping noise signal when treating clipped signal alignd, eliminate because the delay inequality of different disposal;
The step 302 of overlap-add procedure: treat that with described clipped signal deducts described clipping noise signal and handles to finish slicing.
Input signal can close signal or single-carrier signal behind the road for multi-carrier signal in the above-mentioned signal clipping method.
The signal clipping method of present embodiment, can also be under the situation that does not increase logical complexity, m slicing carried out in input signal circulation handle, the main sampling rate size according to characteristic such as signal peak-to-average ratio and input signal of choosing of m value decides, at least m 〉=1.And, the slicing processing speed of input signal is greater than sampling rate to input signal, reach the state of low speed sampling high speed processing, do not do at this and give unnecessary details.
Particularly, m slicing of principle schematic explanation referring to the formation of Fig. 3 slicing handled: after finishing a slicing processing, according to corresponding sampling points data in the described slicing formation of Data Update of signal 8 correspondences after handling, again after upgrading centre two frame n:2n-1---2n the sampling number of 3n-1 is according to detecting maximal peak point signal the corresponding sampling points signal again, then, treat clipped signal and clipping noise signal according to what the maximal peak point signal of upgrading obtained to upgrade, the slicing of finishing is next time handled.In like manner, can circulate and finish m slicing and handle.
Merit attention and be, in m slicing handled, though all be from middle two frame n:2n-1---2n the sampling number of 3n-1 is according to detecting maximal peak point signal the corresponding sampling points signal, but since at every turn in this zone detected maximal peak point signal not necessarily identical, be that the symmetrical 2n in a center sampled point signal is also not necessarily identical with this maximal peak point signal so.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, handle the inhibition that realizes signal peak through m circulation slicing, the storage and the calculating operation that need carry out are less, its logical design is simple and the FPGA resource occupation is more satisfactory, can be under the situation of resource of optimizing hardware to the inhibition of high peak-to-average force ratio signal, and then increase the effective output of power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment three
As shown in Figure 4, present embodiment proposes a kind of signal clipping method, can carry out k level slicing to input signal and handle.K progression is selected mainly the size according to signal peak-to-average ratio, and some signal only needs one-level can finish control to peak-to-average force ratio, but the signal of high peak-to-average force ratio must multistagely could be realized k〉1.Multi-carrier signal further with output signal passes to power amplifier by digital pre-distortion through after the Digital Up Convert/close the road after k level slicing is handled.
Particularly, principle schematic explanation k level slicing referring to the formation of Fig. 3 slicing is handled, to middle two frame n:2n-1---2n the sampling number of 3n-1 carries out after m slicing handle according to the corresponding sampling points signal, n the sampling number of head of the queue frame 3n:4n-1 outputs to next stage slicing processing links according to corresponding sampling points signal 9 according to certain speed, n the sampling number of tail of the queue frame 0:n-1 moves up according to the corresponding sampling points signal, and the slicing formation that enters of the sampled point signal that such frame is new begins the slicing processing.Because logical design is simple, signal clipping method is easy to multistage expansion, realizes high peak-to-average force ratio signal is better suppressed.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, handle the inhibition that realizes signal peak through m circulation slicing, the storage and the calculating operation that need carry out are less, its logical design is simple and the FPGA resource occupation is more satisfactory, be easy to multistage expansion, can be under the situation of resource of optimizing hardware to the inhibition of high peak-to-average force ratio signal, and then the effective output of increase power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment four
As shown in Figure 5, present embodiment proposes a kind of signal clipping device, and input signal can close signal or single-carrier signal behind the road for multi-carrier signal, comprising:
Treat clipped signal unit 11, be used for input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, acquisition is that the sampled point signal at center is as treating clipped signal with this maximal peak point signal, can know, the peak point signal can be considered as surpassing the noise signal of default thresholding, finds a maximal peak point signal according to default thresholding here;
Clipping noise signal unit 21, described maximal peak point signal and preset clipping coefficient multiplied each other obtains clipping noise signal;
Slicing processing unit 31 is used for the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is realized the slicing processing;
The parameter preset memory cell is used to store described default wave absorption coefficient, default thresholding.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, the storage and the calculating operation that need carry out are less, simple and the FPGA resource occupation is more satisfactory in its logical design, can under the situation of resource of optimizing hardware, realize inhibition to high peak-to-average force ratio signal, and then the effective output of increase power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment five
Present embodiment proposes a kind of signal clipping device, comprise: treat clipped signal unit 11, be used for input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, obtaining with this maximal peak point signal is that the sampled point signal at center is as treating clipped signal; Clipping noise signal unit 21, described maximal peak point signal and preset clipping coefficient multiplied each other obtains clipping noise signal; Slicing processing unit 31 is used for the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is realized the slicing processing; Parameter preset memory cell 41 is used to store described default wave absorption coefficient, default thresholding.
Particularly, as Fig. 6 and shown in Figure 7, treat that clipped signal unit 11 comprises:
Sampling unit 111, be used for acquired signal and the data of sampled point signal correspondence are formed the slicing formation, described slicing formation comprises at least four frame sampling point data frames, every frame sampling point data frame comprises n sampled point signal corresponding sampling points data, the density size that surpasses the peak noise point of presetting thresholding in the size of choosing main and signal peak-to-average ratio of n value and the signal is relevant, n 〉=1, embodiment of the invention n 〉=32;
Maximal peak point query unit 112 is used for detecting the maximal peak point signal that surpasses default thresholding from centre two frames of described slicing formation;
Treat clipped signal generation unit 113, be used for to be that the symmetrical 2n in a center sampled point signal is as treating clipped signal with this maximal peak point signal, as shown in Figure 7, the centre two frame n:2n-1 of slicing formation---3n-1 2n sampling number altogether is the selection zone of maximal peak point signal according to the corresponding sampling points signal.
Slicing processing unit 31 comprises:
Time delay unit 311 is used for described delaying with described clipping noise signal when treating clipped signal alignd, and eliminates because the delay inequality of different disposal;
Described signal clipping device, also comprise: buffer unit 51, be used to store described slicing formation, corresponding sampling number certificate in the described slicing formation of Data Update according to the signal correspondence after the slicing processing, to carry out slicing processing next time, circulation is upgraded and is finished m slicing processing, wherein, and described m 〉=1.And the processing speed of buffer unit store data inside reaches the state of low speed sampling high speed processing greater than the sampling rate of described sampling unit, does not do at this and gives unnecessary details.
Preset clipping coefficient can generate according to the spectral characteristic of input signal or be default according to empirical value, and its major function is to guarantee that the frequency spectrum of clipping noise signal is undistorted.Treat that clipped signal is a 2n sampled point signal, preferably, the number of clipping factor can be≤2n,
Signal flow with signal clipping device always illustrates how to realize the processing of one stage signal slicing below, referring to Fig. 7, at first, initial sampled point signal 1 is imported the slicing formation successively according to certain sampling rate, with n sampling number certificate is a frame, import four frame data, comprise tail of the queue frame 0:n-1, head of the queue frame 3n:4n-1 and middle two frame n:2n-1---2n:3n-1; Then, default thresholding 3 according to middle processor configuration, treat clipped signal generation unit 112 two frame n:2n-1 in the middle of the slicing formation---2n the sampling number of 2n:3n-1 be according to detecting a maximal peak point signal the corresponding sampling points signal 2, and to determine from the signal of slicing formation correspondence with this maximal peak point signal according to maximal peak point signal be that the symmetrical 2n in a center sampled point signal is as treating clipped signal 5; Then, according to maximal peak point signal and preset clipping coefficient 4, clipping noise signal unit 21 obtains clipping noise signal 6; Then, treat that clipped signal 5 forms time delay through 311 backs, time delay unit and treats clipped signal 7, subtrator 312 is treated clipped signal 7 stack clipping noise signal 6 with time delay, finishes a slicing and handles; Then, the corresponding sampling number certificate of the Data Update slicing formation of signal 8 correspondences after slicing is handled, circulation is carried out m slicing and is handled; At last, n sampling number exported according to certain signal rate according to corresponding sampling points signal 9 among the head of the queue frame 3n:4n-1, and the one stage signal slicing is finished dealing with.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, handle the inhibition that realizes signal peak through m circulation slicing, the storage and the calculating operation that need carry out are less, its logical design is simple and the FPGA resource occupation is more satisfactory, can be under the situation of resource of optimizing hardware to the inhibition of high peak-to-average force ratio signal, and then increase the effective output of power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment six
The structured flowchart of slicing system as shown in Figure 8, present embodiment proposes a kind of signal wave elimination system, comprise k signal clipping device that connects successively, mainly select the number of signal clipping device according to the size of signal peak-to-average ratio, some signal only needs one-level can finish control to peak-to-average force ratio, i.e. k=1, but the signal of high peak-to-average force ratio must multistagely could be realized, k〉1, as CFR_1, CFR_2 ..., CFR_K etc.The flow process of the slicing inter-process at different levels of k level slicing is in full accord, can not give unnecessary details at this referring to embodiment two or five.
Be example specifically to carry out the secondary slicing, signal clipping device CFR_1 is through after carrying out m slicing processing to two frame sampling point data corresponding sampling points signals in the middle of the slicing formation, the sampling number of output head of the queue frame enters next signal clipping device CFR_2 according to the corresponding sampling points signal and carries out the slicing processing, simultaneously, the sampled point signal that a frame is new is imported described signal clipping device CFR_1 and is begun new slicing processing.Because logical design is simple, signal clipping method is easy to multistage expansion, realizes high peak-to-average force ratio signal is better suppressed.
The technical scheme that is provided by the foregoing description as can be seen, one time slicing is handled a maximal peak point signal that realizes removing input signal, handle the inhibition that realizes signal peak through m circulation slicing, the storage and the calculating operation that need carry out are less, its logical design is simple, and the FPGA resource occupation is more satisfactory to be easy to multistage expansion, can be under the situation of resource of optimizing hardware to the inhibition of high peak-to-average force ratio signal, and then the effective output of increase power amplifier, reduce power amplifier at the pressure that promotes on the efficient.
Embodiment seven
As shown in Figure 9, a kind of signal transmitting system, comprise: power amplifier and the signal clipping device that is connected with the input of described power amplifier, wherein, signal clipping device is a CFR_1, perhaps signal clipping device is to connect successively more than one, as CFR_1 ..., CFR_K etc.
Multi-carrier signal is through after the Digital Up Convert/close the road, through CFR_1 ..., the CFR_K signal clipping device carries out slicing and handles the back and further output signal is passed to power amplifier by digital pre-distortion.
The technical scheme that is provided by the foregoing description as can be seen, the signal clipping device logical design is simple, and the FPGA resource occupation is more satisfactory to be easy to multistage expansion, by one or more signal clipping device high peak-to-average force ratio signal being carried out slicing handles, and then realization increases the effective output of power amplifier, the pressure of reduction power amplifier on lifting efficient.
In addition, it will be understood by those skilled in the art that in the method that the embodiment of the invention provides that its all or part of step is to finish by the relevant hardware of program command.Such as finishing by the computer run journey.This program can be stored in read/write memory medium, for example random asccess memory, disk, CD etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (11)
1, a kind of signal clipping method is characterized in that, comprising:
Input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, will be that the sampled point signal at center is as treating clipped signal with this maximal peak point signal;
Described maximal peak point signal and preset clipping coefficient multiplied each other obtain clipping noise signal;
The described clipped signal for the treatment of of the reverse stack of described clipping noise signal is finished slicing and handled.
2, signal clipping method according to claim 1, it is characterized in that, described input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, will be that the sampled point signal at center comprises as the step for the treatment of clipped signal with this maximal peak point signal:
To the input signal sampling and with n sampled point signal corresponding sampling points data is a frame, and input at least four frame sampling point data frames are formed the slicing formation successively, wherein, and described n 〉=1;
From centre two frames of described slicing formation, detect the maximal peak point signal that surpasses default thresholding;
To be that centrosymmetric 2n sampled point signal is as treating clipped signal with this maximal peak point signal.
3, the signal clipping method of stating according to claim 1 is characterized in that, described with described clipping noise signal oppositely the described clipped signal for the treatment of of stack finish the step that slicing handles and comprise:
Described delaying with described clipping noise signal when treating clipped signal alignd;
Treat that with described clipped signal deducts described clipping noise signal and handles to finish slicing.
4, signal clipping method according to claim 2 is characterized in that, also comprises:
Corresponding sampling number carries out slicing processing next time according to this in the described slicing formation of Data Update according to the signal correspondence after the slicing processing, circulation is upgraded and is finished m slicing processing, export the head of the queue frame of described slicing formation and import new tail of the queue frame, wherein, described m 〉=1.
5, signal clipping method according to claim 1 and 2 is characterized in that, the speed that described slicing is handled is greater than the sampling rate to described input signal.
6, a kind of signal clipping device is characterized in that, comprising:
Treating the clipped signal unit, be used for input signal is sampled and therefrom detected the maximal peak point signal that surpasses default thresholding, is that the sampled point signal at center is as treating clipped signal with this maximal peak point signal;
The clipping noise signal unit is used for that described maximal peak point signal be multiply by preset clipping coefficient and obtains clipping noise signal;
The slicing processing unit is used for the described clipped signal for the treatment of of the reverse stack of described clipping noise signal is realized the slicing processing;
The parameter preset memory cell is used to store described default wave absorption coefficient, default thresholding.
7, signal clipping device according to claim 6 is characterized in that, the described clipped signal unit for the treatment of comprises:
Sampling unit, be used for acquired signal and the data of sampled point signal correspondence are formed the slicing formation, described slicing formation comprises at least four frame sampling point data frames, and every frame sampling point data frame comprises n sampled point signal corresponding sampling points data, wherein, described n 〉=1;
The maximal peak point query unit is used for detecting the maximal peak point signal that surpasses default thresholding from centre two frames of described slicing formation;
Treat the clipped signal generation unit, being used for to be that centrosymmetric 2n sampled point signal is as treating clipped signal with this maximal peak point signal.
8, signal clipping device according to claim 6 is characterized in that, described slicing processing unit comprises:
The time delay unit is used for described delaying with described clipping noise signal when treating clipped signal alignd;
Subtrator is used for the described clipped signal for the treatment of is deducted described clipping noise signal.
9, signal clipping device according to claim 7, it is characterized in that, described signal clipping device also comprises: buffer unit, be used to store described slicing formation, corresponding sampling number certificate in the described slicing formation of Data Update according to the signal correspondence after the slicing processing, circulation is upgraded and is finished m slicing processing, wherein, and described m 〉=1.
10, a kind of signal wave elimination system is characterized in that, comprises k connect successively described as the described signal clipping device of claim 6-9 as claim 6-9, wherein, described k〉1.
11, a kind of signal transmitting system, it is characterized in that, comprise: power amplifier and be connected with the input of described power amplifier as the described signal clipping device of claim 6-9, wherein, described signal clipping device is for one or more connect successively.
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| CN 200810240705 CN101442348B (en) | 2008-12-22 | 2008-12-22 | Method, apparatus, system for clipping signal and signal radiation system |
| PCT/CN2009/075709 WO2010072127A1 (en) | 2008-12-22 | 2009-12-18 | Signal clipping method, device, system and signal transmitting system |
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| CN 200810240705 CN101442348B (en) | 2008-12-22 | 2008-12-22 | Method, apparatus, system for clipping signal and signal radiation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072127A1 (en) * | 2008-12-22 | 2010-07-01 | 华为技术有限公司 | Signal clipping method, device, system and signal transmitting system |
| CN102739592A (en) * | 2011-03-31 | 2012-10-17 | 鼎桥通信技术有限公司 | Effective peak point screening method, peak search distributor, and peak clipping device |
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| CN1152493C (en) * | 2002-06-20 | 2004-06-02 | 上海交通大学 | Method for inhibiting peak-to-average ratio in orthogonal frequency division complex communication system |
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| US7792200B2 (en) * | 2005-11-14 | 2010-09-07 | Telefonaltiebolaget Lm Ericsson (Publ) | Peak-to-average power reduction |
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| CN101442348B (en) * | 2008-12-22 | 2013-08-07 | 华为技术有限公司 | Method, apparatus, system for clipping signal and signal radiation system |
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| WO2010072127A1 (en) | 2010-07-01 |
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