CN101662447A - Process method of despiking and device thereof - Google Patents
Process method of despiking and device thereof Download PDFInfo
- Publication number
- CN101662447A CN101662447A CN200910178828A CN200910178828A CN101662447A CN 101662447 A CN101662447 A CN 101662447A CN 200910178828 A CN200910178828 A CN 200910178828A CN 200910178828 A CN200910178828 A CN 200910178828A CN 101662447 A CN101662447 A CN 101662447A
- Authority
- CN
- China
- Prior art keywords
- peak clipping
- sequence
- clipping processing
- kernel
- peak
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/2623—Reduction thereof by clipping
Abstract
The invention discloses a process method of despiking and a device thereof. The method comprises the steps: obtaining a process sequence for despiking by over sampling an initial frequency domain signal of an orthogonal frequency division multiplexing (OFDMA) system; and despiking the process sequence for despiking. The technical scheme of the invention replaces interpolation filter process whichcauses the peak-to-average ratio of the signal to be re-degenerated, thereby reducing the peak-to-average ratio of the OFDMA system and improving the performance of the OFDMA system.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of peak clipping processing method and device.
Background technology
(Peak-to-Average Power Ratio PAPR), abbreviates peak-to-average force ratio as to peak-to-average power ratio, and it is defined as the peak power of signal in the certain hour and the ratio of average power, generally is used for describing the amplitude of signal fluctuation and with the quality of this gauge signal.
In recent years, broadband wireless technology based on IEEE 802.16e standard has become mainstream technology, 802.16e the OFDM that uses in the agreement (OrthogonalFrequency Division Multiplexing, OFDMA) though obtained more and more widely application, the PAPR value is too high but to be main bottleneck on this application all the time.
The PAPR value of OFDMA system is too high, promptly relative single-carrier system, and the instantaneous value of the output signal of OFDMA transmitter has bigger fluctuation.This just requires more intrasystem parts, and for example power amplifier, A/D, D/A converter etc. need have the very big range of linearity.But the non-linear of these parts also can produce nonlinear distortion to the bigger signal of dynamic range, and the harmonic wave that is produced can cause the phase mutual interference between the subchannel, thereby influences the performance of OFDMA system.In addition, requiring that the power amplifier of the very big range of linearity is arranged is to be difficult to realize on hardware, therefore, how PAPR is reduced to optimum efficiency and just seems and be even more important.
At the problems referred to above, amplitude limit, limit filtration, coding, part transfer sequence (Partial Transmit Sequence have also been proposed in the prior art, PTS), selectivity mapping (Selected Mapping, SLM) and tone keep (Tone Reservation, multiple solution such as TR).
The advantage of TR solution is to cause the distortion of OFDMA signal, and the too high signal of peak-to-average force ratio is had good improvement effect.But handle through peak clipping, peak-to-average force ratio obtains the signal after the fine improvement, after Channel Transmission in need to pass through the intermediate frequency filtering interpolation, and filtering interpolation will cause peak-to-average force ratio to be worsened once more.
Summary of the invention
In view of this, the invention provides a kind of peak clipping processing scheme, the problem that is worsened once more in order to the peak-to-average force ratio that solves in the prior art because of the signal of filtering interpolation after causing improving.
According to an aspect of the present invention, provide a kind of peak clipping processing method.
According to peak clipping processing method of the present invention, comprising: carry out over-sampling by initial frequency-region signal, obtain treating peak clipping processing sequence orthogonal frequency division multiplex OFDM A system; This is treated that peak clipping handles sequence and carry out peak clipping and handle.
Preferably, above-mentionedly carry out over-sampling, obtain treating that peak clipping handles sequence by initial frequency-region signal to the OFDMA system, comprise: according to the N of the sampling rate of OFDMA system doubly, initial frequency-region signal is carried out the interpolation zero filling handle, generate the over-sampling sequence, wherein, N is the integer more than or equal to 2; The over-sampling sequence is carried out inverse Fourier transform, obtain treating peak clipping processing sequence.
Preferably, above-mentioned N value equals 2.
Further, the above-mentioned peak clipping processing sequence for the treatment of is carried out peak clipping and handled, comprising: determine peak clipping kernel sequence according to the carrier information of preserved sub-carrier, and will treat that peak clipping processing sequence is as the current peak clipping processing sequence for the treatment of; And following steps (step 1-step 3):
Step 1 is determined the current maximum power value for the treatment of peak clipping processing sequence, determines test value according to maximum power value;
Step 2 is carried out cyclic shift to peak clipping kernel sequence and is handled, and generates iteration peak clipping kernel sequence;
Step 3 is according to above-mentioned peak clipping processing sequence, test value and the iteration peak clipping kernel sequence column-generation peak clipping result sequence treated.
Further, set counter, and described counter carried out initialization, after above-mentioned steps 3, this method also comprises: utilizes counter that the peak clipping iterations is counted, and whether judges number of times that counter calculates less than default peak clipping iterative target number of times, if, then treat that as current peak clipping handles sequence, execution in step 1 with peak clipping result sequence; Otherwise, finish peak clipping and handle operation.
According to another aspect of the present invention, provide a kind of peak clipping processing unit.
According to peak clipping processing unit of the present invention, comprise: treat peak clipping processing sequence generation module, peak clipping processing module, wherein, treat peak clipping processing sequence generation module, be used for carrying out over-sampling, obtain treating peak clipping processing sequence by initial frequency-region signal to the OFDMA system; The peak clipping processing module is used for the described peak clipping processing sequence for the treatment of is carried out peak clipping and handled.
Further, the above-mentioned peak clipping processing sequence generation module for the treatment of comprises: over-sampling submodule, inverse Fourier transform submodule, wherein, the over-sampling submodule, be used for according to the N of the sampling rate of OFDMA system doubly initial frequency-region signal being carried out the interpolation zero filling handling, generate the over-sampling sequence, wherein, N is the integer more than or equal to 2; The inverse Fourier transform submodule is used for the over-sampling sequence is carried out inverse Fourier transform, generates to treat peak clipping processing sequence, and will treat that peak clipping processing sequence outputs to the peak clipping processing module as the current peak clipping processing sequence for the treatment of.
Further, peak clipping processing unit according to the present invention also comprises: peak clipping kernel sequence column-generation module is used for generating peak clipping kernel sequence according to the carrier information of preserved sub-carrier.
Further, above-mentioned peak clipping processing module comprises: sub module stored, maximum power value determine that submodule, test value generate submodule, iteration peak clipping kernel sequence column-generation submodule and peak clipping processing sub, wherein, sub module stored is used to store the current peak clipping processing sequence for the treatment of; Maximum power value is determined submodule, is used for determining the current maximum power value of peak clipping processing sequence and the phase angle of maximum power value for the treatment of; Test value generates submodule, is used for determining the maximum power value that submodule is determined and the phase angle of maximum power value according to maximum power value, generates test value; Iteration peak clipping kernel sequence column-generation submodule is used for that the peak clipping kernel sequence that peak clipping kernel sequence column-generation module generates is carried out cyclic shift and handles, and generates iteration peak clipping kernel sequence; The peak clipping processing sub is used for generating peak clipping result sequence according to above-mentioned treating in peak clipping processing sequence, test value and the iteration peak clipping.
Further, peak clipping processing unit according to the present invention also comprises: counter, iteration control unit, and wherein, counter is used for the peak clipping iterations is counted, and when peak clipping result sequence generated, the increase of control peak clipping iterations was once; Whether iteration control unit, the number of times that is used to judge counter calculating be less than default peak clipping iterative target number of times, if then be input to sub module stored, triggering peak clipping processing module with peak clipping result sequence as the current peak clipping processing sequence for the treatment of; Otherwise, peak clipping result sequence is exported as the peak clipping result.
Compared with prior art, by above-mentioned at least one scheme of the present invention, adopting the inventive method and install can be on the basis of original reduction OFDMA system peak-to-average ratio, by the initial frequency-region signal of OFDMA system being carried out the processing of over-sampling, replacing the filtering interpolation that the peak-to-average force ratio that can cause signal worsens once more handles, thereby both reduced the peak-to-average force ratio of OFDMA system, improved the performance of OFDMA system again.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the peak clipping processing method of the embodiment of the invention;
Fig. 2 handles the flow chart of sequence acquisition methods according to the peak clipping for the treatment of of the embodiment of the invention;
Fig. 3 handles the flow chart that sequence is carried out the peak clipping processing according to the peak clipping for the treatment of of the embodiment of the invention;
Fig. 4 is the detail flowchart of peak clipping processing method according to the preferred embodiment of the invention;
Fig. 5 is the structural representation according to the peak clipping processing unit of the embodiment of the invention.
Embodiment
Functional overview
The technical scheme that the embodiment of the invention provides, carry out over-sampling by initial frequency-region signal to orthogonal frequency division multiplex OFDM A system, generate sample sequence, this sample sequence is carried out inverse Fourier transform obtain treating peak clipping processing sequence, and treat peak clipping processing sequence and carry out the peak clipping processing, generate peak clipping result sequence.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, at first provide a kind of peak clipping processing method.
Fig. 1 is the flow chart according to the peak clipping processing method of the embodiment of the invention, and as shown in Figure 1, this method comprises (step 102-step 104):
Step 102, carry out over-sampling, obtain treating that peak clipping handles sequence by initial frequency-region signal to orthogonal frequency division multiplex OFDM A system;
Step 104, treat that to above-mentioned peak clipping handles sequence and carry out peak clipping and handle.
As shown in Figure 2, in concrete implementation process, above-mentioned steps 102 can realize (step 202-step 204) by following steps:
Step 202, according to the N of the sampling rate of OFDMA system is doubly carried out the interpolation zero filling to initial frequency-region signal and is handled, and generates the over-sampling sequence, and wherein, N is the integer more than or equal to 2;
Step 204, above-mentioned over-sampling sequence is carried out inverse Fourier transform, obtain treating that peak clipping handles sequence.
As shown in Figure 3, in concrete implementation process, above-mentioned steps 104 can realize (step 302-step 310) by following flow process:
Step 302, determine peak clipping kernel sequence, and treat that with above-mentioned peak clipping handles sequence and treat that as current peak clipping handles sequence according to the carrier information of preserved sub-carrier;
Preferably, the position of preserved sub-carrier is to determine according to the definition to subchannel among the IEEE 802.1, and the position of preserved sub-carrier is lower than the subchannel of set point for idle subchannel or transmission signal to noise ratio.
Step 304, determine currently to treat that peak clipping handles the maximum power value of sequence, determine test value according to maximum power value;
Preferably, determine current treat that the maximum power value of sequence is handled in peak clipping after, also need to determine the phase angle of this maximum power value, and determine test value according to above-mentioned maximum power value and phase angle.
Step 306, the peak clipping kernel sequence of determining in the step 302 is carried out cyclic shift handle, generate iteration peak clipping kernel sequence;
Preferably,, the peak clipping kernel sequence of determining in the step 302 is carried out cyclic shift handle, generate iteration peak clipping kernel sequence according to the above-mentioned position of maximum power value in treating peak clipping processing sequence for the treatment of peak clipping processing sequence.
Step 308, treat that according to above-mentioned peak clipping handles sequence, above-mentioned test value and above-mentioned iteration peak clipping kernel sequence column-generation peak clipping result sequence.
Preferably, in the peak clipping processing method that the embodiment of the invention provides, also need to be provided with counter, utilize this counter that the peak clipping iterations is counted.
The initial value of above-mentioned counter can be set to 0, and after each peak clipping was handled, the value of current counter added 1, equals predefined peak clipping target iteration number of times until the value of counter, finishes whole peak clipping handling process.
The initial value of above-mentioned counter also can be set to predefined peak clipping target iteration number of times, and after each peak clipping was handled, the value of current counter subtracted 1, until the value 0 of counter, finishes whole peak clipping handling process.
Step 310, when generating peak clipping result sequence, whether judge number of times that above-mentioned counter calculates less than default peak clipping iterative target number of times, if then treat that as current peak clipping handles sequence, execution in step 304 with described peak clipping result sequence; Otherwise, finish the peak clipping handling process.
In above-mentioned flow process (step 302-step 310), treat that current peak clipping handles after sequence determines, the sequencing of step 304 and the no strictness of step 306 can first execution in step 304, also can first execution in step 306, can also executed in parallel.
Below by specific embodiment above-mentioned peak clipping processing method is described in detail.
Fig. 4 is the detail flowchart of peak clipping processing method according to the preferred embodiment of the invention.As shown in Figure 4, the detailed process of the preferred embodiment following (step 402-step 414):
Step 402, to the initial frequency-region signal dat (j) of OFDMA system, j[1, N] carry out over-sampling and handle, generate over-sampling sequence samp (i), i[1,2N];
In this step, 2 times of the sampling rate that using system is current carry out the processing of interpolation zero filling to initial frequency-region signal.Suppose initial frequency-region signal dat (j), j[1, N] comprise N subcarrier, be expressed as respectively dat (1), dat (2) ..., dat (N).At first get 1st～N/2 the subcarrier of the 1st～N/2 subcarrier of this signal as over-sampling sequence samp, be expressed as samp (1), samp (2) ..., samp (N/2); Fill out N zero the N/2+1～3N/2 subcarrier afterwards at N/2 the subcarrier samp (N/2) of over-sampling sequence then as over-sampling sequence samp, be expressed as samp (N/2+1), samp (N/2+2) ..., samp (3N/2); Get the 3N/2+1～2N the subcarrier of the N/2+1～N subcarrier of dat at last as over-sampling sequence samp, be expressed as samp (3N/2+1), samp (3N/2+2) ..., samp (2N).Handling 2N the subcarrier that forms through over-sampling is exactly over-sampling sequence samp (i), i[1,2N], specifically be expressed as:
Step 404, to over-sampling sequence samp (i), i[1,2N] carry out inverse Fourier transform, produce and treat that peak clipping handles sequence data (i), i[1,2N];
Step 406, according to the carrier position information of preserved sub-carrier, utilize tone to keep algorithm and determine peak clipping kernel sequence kernel (i), i[1,2N], sequence data (i), i[1,2N are handled in above-mentioned peak clipping] treat that as current peak clipping handles sequence;
In concrete implementation process, obtain and the carrier position information a={a1 of temporary preserved sub-carrier, a2, a3....an}, (n＜N), and this positional information is carried out over-sampling handle, obtain preserved sub-carrier sequence b (i);
To above-mentioned preserved sub-carrier sequence b (i), i[1,2N] carry out inverse Fourier transform (IFFT conversion), generate and temporary peak clipping kernel sequence kernel (i) i.e. kernel (i)=IFFT (b (i)), i[1,2N].
In this step, the position of preserved sub-carrier is to determine according to the definition of IEEE 802.16 sub-channels, and the position of preserved sub-carrier is lower than the subchannel of set point for idle subchannel or transmission signal to noise ratio.
Step 408, determine currently to treat that peak clipping handles the maximum power peak valmax among the sequence data (i), and determine test value beta according to beta=(valmax-target) * const*ej* θ (val);
Wherein, target is the peak clipping target power, and const is the peak clipping step-length, and θ (val) is the pairing phase angle of maximum power peak valmax;
In this step, power peak valmax calculates according to valmax=max (| data (i) |) and determines that peak clipping target power value target is 5.1dB; Peak clipping step-length const is 21.33325.
Step 410, peak clipping kernel sequence kernel (i) is carried out cyclic shift one time, obtain iteration peak clipping kernel sequence kernel ' (i);
In this step, iteration peak clipping kernel sequence kernel ' (i) obtains by following step:
A1) determine to treat that peak clipping handles the pairing position pos of maximum power peak valmax among the sequence data (i);
A2) according to kernel ' (i)=kernel (mod (i+1-pos, 1024)) determines iteration peak clipping kernel sequence kernel ' (i).
Step 412, utilize data ' (i)=data (i)-beta*kernel ' (i) determines peak clipping result sequence data ' (i);
Step 414, judge that the value of counter is whether less than default peak clipping iterative target number of times, if, then (i) refresh and currently treat that peak clipping handles sequence data (i) with peak clipping result sequence data ', and execution in step 408, handle operation otherwise finish peak clipping, the value of counter is made as initial value.
In above-mentioned flow process, (i) refresh and currently treat that peak clipping handles sequence data (i) afterwards with peak clipping result sequence data ', the sequencing of step 408 and the no strictness of step 410 can first execution in step 408, also can first execution in step 410, but also executed in parallel.
Though to use 2 times of the current sampling rate of system to describe, be not limited to this in the above-mentioned flow process, in concrete the application, also can carry out over-sampling to initial frequency-region signal with other multiple of the current sampling rate of system as example.
According to the embodiment of the invention, also provide a kind of peak clipping processing unit.
Fig. 5 is the structural representation according to the peak clipping processing unit of the embodiment of the invention, as shown in Figure 5, this device comprises: treat peak clipping processing sequence generation module 51 and peak clipping processing module 52, wherein, treat that peak clipping processing sequence generation module 51 is used for carrying out over-sampling by the initial frequency-region signal to the OFDMA system, obtains treating peak clipping processing sequence; Peak clipping processing module 52 is used for the above-mentioned peak clipping processing sequence for the treatment of is carried out peak clipping and handled.
As shown in Figure 5, the above-mentioned peak clipping processing sequence generation module 51 for the treatment of may further include: over-sampling submodule 511 and inverse Fourier transform submodule 512, wherein, over-sampling submodule 511, be used for according to the N of the sampling rate of OFDMA system doubly initial frequency-region signal being carried out the interpolation zero filling handling, generate the over-sampling sequence, wherein, N is the integer more than or equal to 2; Inverse Fourier transform submodule 512 is used for above-mentioned over-sampling sequence is carried out inverse Fourier transform, generates to treat peak clipping processing sequence, and this is treated that peak clipping processing sequence outputs to peak clipping processing module 52 as the current peak clipping processing sequence for the treatment of.
As shown in Figure 5, the peak clipping processing unit according to the embodiment of the invention also comprises: peak clipping kernel sequence column-generation module 53 is used for generating peak clipping kernel sequence according to the carrier information of preserved sub-carrier.
As shown in Figure 5, above-mentioned peak clipping kernel sequence column-generation module 53 further comprises: preserved sub-carrier obtains submodule 531, the preserved sub-carrier sequence generates submodule 532 and peak clipping kernel sequence column-generation submodule 533, wherein, preserved sub-carrier obtains submodule 531, be used to obtain and the carrier position information of temporary preserved sub-carrier, wherein, the position of preserved sub-carrier can be to determine according to the definition of IEEE 802.16 sub-channels, can or transmit signal to noise ratio for some idle subchannel and be lower than set point, be i.e. the relatively poor subchannel of signal to noise ratio; The preserved sub-carrier sequence generates submodule 532, is used for obtaining according to preserved sub-carrier the carrier position information generation preserved sub-carrier sequence of the preserved sub-carrier of submodule 531 storages; Peak clipping kernel sequence column-generation submodule 533 is used for reading the preserved sub-carrier sequence that the preserved sub-carrier sequence generates submodule 532 storages, and carries out inverse Fourier transform, generates and temporary peak clipping kernel sequence.
As shown in Figure 5, above-mentioned peak clipping processing module 52 further comprises: sub module stored 521, maximum power value determine that submodule 522, test value generate submodule 523, iteration peak clipping kernel sequence column-generation submodule 524 and peak clipping processing sub 525, wherein, sub module stored 521 is used to store the current peak clipping processing sequence for the treatment of; Maximum power value is determined submodule 522, is used for determining the current maximum power value of peak clipping processing sequence and the phase angle of this maximum power value for the treatment of; Test value generates submodule 523, is used for determining the maximum power value that submodule is determined and the phase angle of maximum power value according to maximum power value, generates test value; Iteration peak clipping kernel sequence column-generation submodule 524 is used for that the peak clipping kernel sequence that peak clipping kernel sequence column-generation module generates is carried out cyclic shift and handles, and generates iteration peak clipping kernel sequence; Peak clipping processing sub 525 is used for generating peak clipping result sequence according to above-mentioned treating in peak clipping processing sequence, test value and the iteration peak clipping.
As shown in Figure 5, preferably, also comprise according to the peak clipping processing unit of the embodiment of the invention: counter 54 and iteration control unit 55, wherein, counter 54 is used for the peak clipping iterations is counted, when described peak clipping result sequence generated, the increase of control peak clipping iterations once; Iteration control unit 55, be used to judge that whether the number of times of counter calculating is less than default peak clipping iterative target number of times, if, then be input to above-mentioned sub module stored 521 as the current peak clipping processing sequence for the treatment of with peak clipping result sequence, trigger peak clipping processing module 52; Otherwise, peak clipping result sequence is exported as the peak clipping result.
As mentioned above, the technical scheme that provides by the embodiment of the invention, by the initial frequency-region signal of OFDMA system being carried out the processing of over-sampling, replacing the filtering interpolation that the peak-to-average force ratio that can cause signal worsens once more handles, thereby further reduced the peak-to-average force ratio of OFDMA system, and improved the performance of OFDMA system.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a peak clipping processing method is characterized in that, comprising:
Carry out over-sampling by initial frequency-region signal, obtain treating peak clipping processing sequence orthogonal frequency division multiplex OFDM A system;
The described peak clipping processing sequence for the treatment of is carried out peak clipping and handled.
2. method according to claim 1 is characterized in that, carries out over-sampling by the initial frequency-region signal to the OFDMA system, obtains the described peak clipping processing sequence for the treatment of, comprising:
According to the N of the sampling rate of described OFDMA system doubly, described initial frequency-region signal is carried out the interpolation zero filling handle, generate the over-sampling sequence, wherein, N is the integer more than or equal to 2;
Described over-sampling sequence is carried out inverse Fourier transform, obtain the described peak clipping processing sequence for the treatment of.
3. method according to claim 2 is characterized in that N equals 2.
4. method according to claim 1 is characterized in that, the described peak clipping processing sequence for the treatment of is carried out peak clipping and handled, and comprising:
Determine peak clipping kernel sequence according to the carrier information of preserved sub-carrier, and treat that with described peak clipping handles sequence and treat that as current peak clipping handles sequence;
Step 1 is determined the described current maximum power value for the treatment of peak clipping processing sequence, determines test value according to maximum power value;
Step 2 is carried out cyclic shift to described peak clipping kernel sequence and is handled, and generates iteration peak clipping kernel sequence;
Step 3 is according to described peak clipping processing sequence, described test value and the described iteration peak clipping kernel sequence column-generation peak clipping result sequence treated.
5. method according to claim 4 is characterized in that, sets counter, and described counter is carried out initialization, and after described step 3, described method also comprises:
Utilize described counter that the peak clipping iterations is counted, and whether judge number of times that described counter calculates, if then treat that as current peak clipping handles sequence, execution in step 1 with described peak clipping result sequence less than default peak clipping iterative target number of times; Otherwise, finish peak clipping and handle operation.
6. a peak clipping processing unit is characterized in that, comprising:
Treat peak clipping processing sequence generation module, be used for carrying out over-sampling, obtain treating peak clipping processing sequence by initial frequency-region signal to the OFDMA system;
The peak clipping processing module is used for the described peak clipping processing sequence for the treatment of is carried out peak clipping and handled.
7. device according to claim 6 is characterized in that, the described peak clipping processing sequence generation module for the treatment of comprises:
The over-sampling submodule is used for according to the N of the sampling rate of described OFDMA system doubly described initial frequency-region signal being carried out the interpolation zero filling handling, and generates the over-sampling sequence, and wherein, N is the integer more than or equal to 2;
The inverse Fourier transform submodule is used for described over-sampling sequence is carried out inverse Fourier transform, generates to treat peak clipping processing sequence, and the described peak clipping processing sequence for the treatment of is outputed to described peak clipping processing module as the current peak clipping processing sequence for the treatment of.
8. device according to claim 7 is characterized in that, described device also comprises:
Peak clipping kernel sequence column-generation module is used for generating peak clipping kernel sequence according to the carrier information of preserved sub-carrier.
9. device according to claim 8 is characterized in that, described peak clipping processing module comprises:
Sub module stored is used to store the described current peak clipping processing sequence for the treatment of;
Maximum power value is determined submodule, is used for determining the described current maximum power value of peak clipping processing sequence and the phase angle of described maximum power value for the treatment of;
Test value generates submodule, is used for determining the described maximum power value that submodule is determined and the phase angle of described maximum power value according to described maximum power value, generates test value;
Iteration peak clipping kernel sequence column-generation submodule is used for that the described peak clipping kernel sequence that described peak clipping kernel sequence column-generation module generates is carried out cyclic shift and handles, and generates iteration peak clipping kernel sequence;
The peak clipping processing sub is used for generating peak clipping result sequence according to described treating in peak clipping processing sequence, described test value and the described iteration peak clipping.
10. device according to claim 9 is characterized in that, described device also comprises:
Counter is used for the peak clipping iterations is counted, and when described peak clipping result sequence generated, the increase of control peak clipping iterations once;
The iteration control unit, be used to judge that whether the number of times of described counter calculating is less than default peak clipping iterative target number of times, if, then be input to described sub module stored as the current peak clipping processing sequence for the treatment of with described peak clipping result sequence, trigger described peak clipping processing module; Otherwise, described peak clipping result sequence is exported as the peak clipping result.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910178828 CN101662447B (en) | 2009-09-28 | 2009-09-28 | Process method of despiking and device thereof |
| PCT/CN2010/072996 WO2010145397A1 (en) | 2009-09-28 | 2010-05-20 | Method and device for reducing peak-to-average power ratio of ofdma system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910178828 CN101662447B (en) | 2009-09-28 | 2009-09-28 | Process method of despiking and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101662447A true CN101662447A (en) | 2010-03-03 |
| CN101662447B CN101662447B (en) | 2013-03-27 |
Family
ID=41790240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910178828 Active CN101662447B (en) | 2009-09-28 | 2009-09-28 | Process method of despiking and device thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101662447B (en) |
| WO (1) | WO2010145397A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010145397A1 (en) * | 2009-09-28 | 2010-12-23 | 中兴通讯股份有限公司 | Method and device for reducing peak-to-average power ratio of ofdma system |
| CN105874734A (en) * | 2013-10-30 | 2016-08-17 | 三菱电机株式会社 | Transmission device, reception device, and communication system |
| WO2016165481A1 (en) * | 2015-08-27 | 2016-10-20 | 中兴通讯股份有限公司 | Digital signal processing method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100589466C (en) * | 2005-11-24 | 2010-02-10 | 中国科学院上海微系统与信息技术研究所 | Method for suppressing peak to average ratio of multicarrier system for spectrum criterion in scope of four times bandwidth |
| CN101262460B (en) * | 2007-03-09 | 2011-06-22 | 中兴通讯股份有限公司 | A device and method for reducing peak mean ratio |
| CN101478521B (en) * | 2009-01-20 | 2012-02-01 | 华南理工大学 | Peak cutting method for adaptive in-band processing |
| CN101662447B (en) * | 2009-09-28 | 2013-03-27 | 中兴通讯股份有限公司 | Process method of despiking and device thereof |
-
2009
- 2009-09-28 CN CN 200910178828 patent/CN101662447B/en active Active
-
2010
- 2010-05-20 WO PCT/CN2010/072996 patent/WO2010145397A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010145397A1 (en) * | 2009-09-28 | 2010-12-23 | 中兴通讯股份有限公司 | Method and device for reducing peak-to-average power ratio of ofdma system |
| CN105874734A (en) * | 2013-10-30 | 2016-08-17 | 三菱电机株式会社 | Transmission device, reception device, and communication system |
| CN105874734B (en) * | 2013-10-30 | 2018-04-17 | 三菱电机株式会社 | Dispensing device, reception device and communication system |
| US10299136B2 (en) | 2013-10-30 | 2019-05-21 | Mitsubishi Electric Corporation | Transmission apparatus, reception apparatus, and communication system |
| US10575187B2 (en) | 2013-10-30 | 2020-02-25 | Mitsubishi Electric Corporation | Transmission apparatus, reception apparatus, and communication system |
| WO2016165481A1 (en) * | 2015-08-27 | 2016-10-20 | 中兴通讯股份有限公司 | Digital signal processing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101662447B (en) | 2013-03-27 |
| WO2010145397A1 (en) | 2010-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Van Eeckhaute et al. | Performance of emerging multi-carrier waveforms for 5G asynchronous communications | |
| US6845082B2 (en) | Peak to average power ratio reduction in communication systems | |
| US7873118B2 (en) | Apparatus and method for controlling peak to average power ratio (PAPR) | |
| EP2299624B1 (en) | Signaling method in an OFDM multiple access system | |
| US9014284B2 (en) | Peak-to-average power ratio (PAR) reduction based on active-set tone reservation | |
| US20100020895A1 (en) | Method and device for reducing signal peak value and transmitting device | |
| CN106027444B (en) | A kind of method for suppressing peak to average ratio of subcarrier-modulated ofdm system | |
| Zhou et al. | Peak-to-average power ratio reduction for OFDM/OQAM signals via alternative-signal method | |
| CN101771652B (en) | Amplitude limiting reserved sub carrier wave reduction PAPR method and system based on amplitude proportion factors | |
| US11424974B2 (en) | Method and system for multi-carrier time division multiplexing modulation/demodulation | |
| US8385442B2 (en) | Transmitter and the method therefor | |
| KR100854064B1 (en) | Method for reduction of peak to average power ratio at orthogonal frequency division multiplexing system | |
| CN104917712B (en) | Signal processing method and device | |
| CN101414994A (en) | Method and apparatus for reducing peak average power ratio of multi-carrier system | |
| Sundeepkumar et al. | Adaptive clipping-based active constellation extension for PAPR reduction of OFDM/OQAM signals | |
| CN101662447B (en) | Process method of despiking and device thereof | |
| CN102739595A (en) | Method for reducing peak-to-average ratio of OFDM signal and device thereof | |
| Ikni et al. | PAPR reduction in FBMC-OQAM systems based on discrete sliding norm transform technique | |
| Waichal et al. | Performance analysis of FFT based OFDM system and DWT based OFDM system to reduce inter-carrier interference | |
| US20100046662A1 (en) | Digital clipping method for a transmitter of an orthogonal frequency division multiple access system | |
| KR20090059315A (en) | Appratus and method for inverse fast fourier transform in communication system | |
| Cuteanu et al. | Papr reduction of OFDM signals using partial transmit sequence and clipping hybrid scheme | |
| Suma et al. | Orthogonal frequency division multiplexing peak‐to‐average power ratio reduction by best tree selection using coded discrete cosine harmonic wavelet packet transform | |
| CN201294546Y (en) | Device of multi-carrier system for reducing peak-to-average power ratio | |
| Thota et al. | Comparison of PAPR in OFDM and FBMC/OQAM Using PAPR Reduction Methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |