CN101247154A - System and method for implementing mutual compensation between despicking and digital predistortion - Google Patents
System and method for implementing mutual compensation between despicking and digital predistortion Download PDFInfo
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- CN101247154A CN101247154A CNA2008100857847A CN200810085784A CN101247154A CN 101247154 A CN101247154 A CN 101247154A CN A2008100857847 A CNA2008100857847 A CN A2008100857847A CN 200810085784 A CN200810085784 A CN 200810085784A CN 101247154 A CN101247154 A CN 101247154A
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Abstract
The present invention discloses a system which is realized with crest factor reduction and digital predistortion mutual compensation. The system comprises a crest factor reducing (CFR) equipment and a digital predistortion (DPD) equipment, and the system also comprises a CFR and DPD comprehensive processing equipment which is used for controlling and optimization-processing the signal processed by the CFR equipment and the DPD equipment and realizing the mutual compensation between the signals processed by the CFR equipment and the DPD equipment. The invention also discloses a method for realizing the crest factor reduction and digital predistortion mutual compensation. The principle that a converse relationship exists between the processions of CFR equipment and the DPD equipment is used for reducing the non-recoverable damage of the signal by the CFR equipment. Thereby the reducing of the signal peak-to-average ratio is effectively realized. The linearity of the power amplifying is increased while the power amplifying efficiency is increased.
Description
Technical field
The present invention relates to the technology that signal compensates mutually, relate in particular to the system and method that a kind of realization peak clipping (CFR, CrestFactor Reduction) technology and digital pre-distortion (DPD, Digital PreDistortion) technology compensate mutually
Background technology
In modern communication systems, in design to the base station power amplification system, high power amplification efficiency and high linearity are the major requirements that system design is proposed to base station power amplification, and the main flow signal that adopts in the modern communication is the non-constant envelope signal in higher peak-to-average force ratio broadband that carries the more information amount, and the large-signal peak value that this non-constant envelope signal produces can have influence on the power amplification efficiency and the linearity of base station power amplification system.When design base station power amplification system, adopt CFR technology and DPD technology to alleviate low power amplification efficiency and low linear problem that the large-signal peak value is caused usually at present.
Below respectively CFR technology and DPD technology are specifically addressed.
At the CFR technology, the processing of CFR technology is with the peak-to-average force ratio reduction of signal, reaches the purpose that improves power amplification efficiency.Here, the peak-to-average force ratio reduction of signal is: the power that reduces this signal peak value point, and take into account the Error Vector Magnitude (EVM, Error Vector Magnitude) of signal and the index of neighboring trace leakage power rejection ratio (ACPR, Adjacent Channel leakage Power Ratio).So, this processing will cause the infringement of the irrecoverable property of EVM of signal.
For instance, Figure 1 shows that the composition structural representation of existing CFR equipment.Among Fig. 1, this CFR equipment comprises first delay unit 11, second delay unit 22, peak value searching device 33 and peak value offset device 44.And peak value offset device 44 comprises cancellation pulses generation unit 441, cancellation pulses forming unit 442 and peak pulse offset unit 443.Wherein, peak value searching device 33 and peak value offset device 44 are the critical pieces in the CFR equipment, and peak value searching device 33 is used for seeking the peak value of signal and the peak value position at signal; Peak value offset device 44 is used to produce the peak value offset signal, when reducing signal peak by processing such as filtering, takes into account the index request of EVM and ACPR.So, this CFR equipment realizes that by peak value searching device 33 and peak value offset device 44 process of cancellation pulses is: at first, 33 search of peak value searching device obtain importing the peak and the peak value size of the IQ of the quadrature component in the same way signal of CFR equipment.Here, I is component signal in the same way, and Q is an orthogonal component signal.Then, peak value offset device 44 produces peak value offset pulse and IQ signal after time delay is alignd after being shaped to carry out peak value and offsets to handle and reach the effect that reduces peak value, afterwards CFR_I signal after peak value offsets processing and CFR_Q signal is exported CFR equipment.Figure 2 shows that the effect schematic diagram of existing CFR equipment to the peak signal actual treatment.Among Fig. 2, a is used to indicate primary signal, and b is used to indicate signal after the peak clipping.Can find out intuitively that from Fig. 2 signal peak power after the CFR device processes is lowered,, also handle at off peak signaling point simultaneously in order to guarantee the signal ACPR after the CFR device processes.
At the DPD technology, the processing of DPD technology also is the processing to signal peak value point.And the major function of DPD is that correcting mode comprises the nonlinear distortion and the memory-effect distortion of amplitude-amplitude (AM-AM) and amplitude-phase place (AM-PM) in order to the nonlinear distortion characteristics of correction power amplifier.And there is the general character of a highly significant in these two kinds of correcting modes: the compression point that all has 1dB.That is to say that power amplifier is to peak point ubiquity compression property.Because power amplifier is to the compression property of peak point, therefore, in order to make power amplifier linearization, the power that often needs to increase peak point is offset the compression property of power amplifier to peak point when adopting the DPD technical finesse, improves the linearity of power amplifier.So, adopt the DPD technology to the processing of peak point with adopt the CFR technology that the processing of peak point is had certain reverse-power.
For instance, Figure 3 shows that the composition structural representation of existing DPD equipment.Among Fig. 3, this DPD equipment comprises predistortion model 55, power amplification system 66, predistortion model 77 and the self adaptation arithmetic unit 88 that duplicates.So, this DPD equipment to the processing procedure of signal peak value point is: at first set up predistortion model 77, gather the input signal X of power amplification system 66 then by the predistortion model 55 that duplicates, and picked up signal X '; Gather the feedback signal Y of power amplification system 66 by predistortion model 77, and picked up signal Y ', X ' and Y ' input adaptive arithmetic unit 88 are tried to achieve pre-distortion parameters the most at last, revise predistortion model 77, the predistortion model of newly revising is copied in the predistortion model 55 that duplicates fully, thereby finish pre-distortion by above-mentioned adaptive iteration computing.Here it is pointed out that the arrow representative of passing through predistortion model 77 among Fig. 3 revises the implication of predistortion models 77 by self adaptation arithmetic unit 88.Figure 4 shows that the gain curve schematic diagram of existing typical power amplifier input signal, and abscissa represent the power of input signal, on behalf of power amplifier, ordinate gain.Can find out intuitively that from Fig. 4 along with the power increase of input signal, the power amplifier gain is on a declining curve.Figure 5 shows that the effect schematic diagram that existing DPD equipment is handled signal predistortion.Among Fig. 5, c is used to indicate primary signal, and d is used to indicate signal after the predistortion.From Fig. 2 and Fig. 5, can intuitively find out so, processing for peak point, adopt CFR equipment and DPD equipment to exist reverse-power, be and adopt CFR device processes signal the peak value of signal partly can be reduced, and adopt DPD device processes signal the peak value of signal partly can be raised.
In sum, prior art is that CFR technology and DPD technology are studied as two independent technology points.The main research contents of CFR technology is that EVM lower under the identical peak clipping effect worsens, identical EVM worsens under lower down peak-to-average force ratio and the identical peak clipping result more taking of low-resource.The better ACPR of pursuit to the effect that of DPD technical research improves effect.Correspondingly, CFR equipment and DPD equipment also all are to be taken as two autonomous devices to use in actual applications.And CFR equipment in the system and DPD equipment are come processing signals as autonomous device respectively, owing to adopt CFR equipment to there being irrecoverable property damage in the processes such as peak-to-average force ratio reduction, thereby make CFR equipment obtain severely restricts to the reduction of signal peak-to-average ratio to signal.
Summary of the invention
In view of this, the system that provides a kind of CFR of realization and DPD to compensate mutually is provided main purpose of the present invention, make to adopt and realize compensation mutually between CFR equipment and the handled signal of DPD equipment, utilize the processing of CFR equipment and DPD equipment to have the principle of reverse-power, reduce of the irrecoverable property damage of CFR equipment to signal, thereby realize the reduction of signal peak-to-average ratio effectively, also improved the linearity of power amplifier when improving power amplification efficiency.
The method that provides a kind of CFR of realization and DPD to compensate mutually is provided, make to adopt and realize compensation mutually between CFR equipment and the handled signal of DPD equipment, utilize the processing of CFR equipment and DPD equipment to have the principle of reverse-power, reduce of the irrecoverable property damage of CFR equipment to signal, thereby realize the reduction of signal peak-to-average ratio effectively, also improved the linearity of power amplifier when improving power amplification efficiency.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of system that realizes that peak clipping and digital pre-distortion compensate mutually, this system comprises peak clipping CFR equipment and digital pre-distortion DPD equipment, wherein, this system also comprises CFR and DPD comprehensive treatment equipment, be used for described CFR equipment and the handled signal of described DPD equipment are controlled and optimization process, realize the mutual compensation between CFR equipment and the handled signal of DPD equipment.
Wherein, described CFR and DPD comprehensive treatment equipment are further used for adopting the processing mode of backstage control type or through type that described CFR equipment and the handled signal of described DPD equipment are controlled and optimization process.
Wherein, under the state that adopts described backstage control type processing mode, described CFR and DPD comprehensive treatment equipment comprise CFR and DPD optimal module, CFR control interactive module and DPD control interactive module; Wherein,
CFR and DPD optimal module are used to set in advance the peak clipping parameter and issue; Via the correction result of CFR control interactive module reception, and analyze and optimization process based on described CFR equipment under the described peak clipping parameter; Via the correction result of DPD control interactive module reception, and analyze and optimization process based on described DPD equipment under the described peak clipping parameter;
CFR controls interactive module, is used for described peak clipping parameter is forwarded to described CFR equipment, and will reports described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter; To be transmitted to described CFR equipment from the optimization result that CFR and DPD optimal module are obtained, and make CFR equipment finish the configuration of relevant parameter and the correction of CFR device processes process based on described optimization result;
DPD controls interactive module, is used for described peak clipping parameter is forwarded to described DPD equipment, and will reports described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter; To be transmitted to described DPD equipment from the optimization result that CFR and DPD optimal module are obtained, and make DPD equipment finish the configuration of relevant parameter and the correction of DPD device processes process based on described optimization result.
Wherein, under the state that adopts described through type processing mode, described CFR and DPD comprehensive treatment equipment comprise CFR and DPD optimal module, CFR control interactive module and DPD control interactive module; Wherein,
CFR and DPD optimal module are used to set in advance the peak clipping parameter and issue; Directly receive correction result with the straight-through tupe of handling, and the correction result of CFR equipment and DPD equipment is synthetically analyzed and optimization process based on described CFR equipment and described DPD equipment under the described peak clipping parameter;
CFR controls interactive module, is used for described peak clipping parameter is forwarded to described CFR equipment, and the straight-through tupe of handling of control CFR equipment employing, will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
DPD controls interactive module, is used for described peak clipping parameter is forwarded to described DPD equipment, and the straight-through tupe of handling of control DPD equipment employing, will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
A kind of method that realizes that peak clipping and digital pre-distortion compensate mutually, this method may further comprise the steps:
A, set in advance the peak clipping parameter and issue; CFR equipment and DPD equipment report CFR and DPD comprehensive treatment equipment with correction result after revising based on described peak clipping parameter;
B, described CFR and DPD comprehensive treatment equipment are by obtaining described correction result, and will analyze and the optimization result that optimizes acquisition returns to the reciprocal process of described CFR equipment and described DPD equipment correction result, realize the mutual compensation between CFR equipment and the handled signal of DPD equipment.
Wherein, when described CFR and DPD comprehensive treatment equipment adopt the processing mode of backstage control type,
Steps A is specially:
A11, CFR and DPD optimal module set in advance the peak clipping parameter and issue;
A12, CFR control interactive module is forwarded to described CFR equipment with described peak clipping parameter, and will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
A13, DPD control interactive module is forwarded to described DPD equipment with described peak clipping parameter, and will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
Wherein, step B is specially:
B11, described CFR and DPD optimal module are controlled the correction result of interactive module reception based on described CFR equipment under the described peak clipping parameter via described CFR, and analyze and optimization process; CFR control interactive module will be transmitted to CFR equipment from the optimization result that CFR and DPD optimal module are obtained, and make CFR equipment finish the configuration of relevant parameter and the correction of CFR device processes process based on described optimization result;
B12, described CFR and DPD optimal module are controlled the correction result of interactive module reception based on described DPD equipment under the described peak clipping parameter via described DPD, and analyze and optimization process; DPD control interactive module will be transmitted to DPD equipment from the optimization result that CFR and DPD optimal module are obtained, and make DPD equipment finish the configuration of relevant parameter and the correction of DPD device processes process based on described optimization result;
B13, after described CFR and DPD optimal module are determined optimum peak clipping parameter, stop to issue of peak clipping parameter.
Wherein, when described CFR and DPD comprehensive treatment equipment adopt the processing mode of through type,
Steps A is specially:
A21, CFR and DPD optimal module set in advance the peak clipping parameter and issue;
A22, CFR control interactive module is forwarded to described CFR equipment with described peak clipping parameter, and the straight-through tupe of handling of control CFR equipment employing, will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
A23, DPD control interactive module is forwarded to described DPD equipment with described peak clipping parameter, and controls the tupe that DPD equipment adopts described straight-through processing, will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
Wherein, step B is specially:
B21, CFR and DPD optimal module are with the tupe of described straight-through processing, directly receive correction result based on described CFR equipment and described DPD equipment under the described peak clipping parameter, and to the correction result of CFR equipment and DPD equipment synthetically analyze with optimization process after, synthetically adjust CFR equipment and the configuration of DPD equipment relevant parameter and the correction of processing procedure;
B22, after described CFR and DPD optimal module are determined optimum peak clipping parameter, stop to issue of peak clipping parameter.
Because when adopting CFR technology and DPD technical finesse signal, there is reverse-power in processing to signal peak value point, therefore the present invention is on the basis of existing CFR equipment and DPD equipment, CFR and DPD comprehensive treatment equipment have been increased, by control and the optimization process of CFR and DPD comprehensive treatment equipment, make to adopt and realize between CFR equipment and the handled signal of DPD equipment compensating mutually existing CFR equipment and DPD signal that equipment is handled.
Adopt the present invention to make and realize compensation mutually between employing CFR equipment and the handled signal of DPD equipment, thereby realize the reduction of signal peak-to-average ratio effectively, also improved the linearity of power amplifier when improving power amplification efficiency.And the EVM deterioration that processing causes to peak value of employing CFR equipment is further improved, thereby on the basis of the linearity that improves power amplification efficiency and power amplifier, further reduced damage to signal EVM.That is to say that reach under the linear case of identical power amplification efficiency and power amplifier, signal EVM is better, under the perhaps identical signal EVM situation, the linearity of power amplification efficiency and power amplifier is more excellent.
Description of drawings
Fig. 1 is the composition structural representation of existing CFR equipment;
Fig. 2 is the effect schematic diagram of existing CFR equipment to the peak signal actual treatment;
Fig. 3 is the composition structural representation of existing DPD equipment;
Fig. 4 is the gain curve schematic diagram of existing typical power amplifier input signal;
Fig. 5 is the effect schematic diagram that existing DPD equipment is handled signal predistortion;
Fig. 6 is the composition structural representation of one embodiment of system of the present invention;
Fig. 7 is the composition structural representation of another embodiment of system among the present invention;
Fig. 8 is the realization flow schematic diagram of the inventive method principle.
Embodiment
Core concept of the present invention is: the present invention is on the basis of existing CFR equipment and DPD equipment, CFR and DPD comprehensive treatment equipment have been increased, by control and the optimization process of CFR and DPD comprehensive treatment equipment, make to adopt and realize between CFR equipment and the handled signal of DPD equipment compensating mutually existing CFR equipment and DPD signal that equipment is handled.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
The system that a kind of CFR of realization and DPD compensate mutually, this system comprise CFR equipment and DPD equipment and CFR and DPD comprehensive treatment equipment.And CFR links to each other with DPD equipment with CFR equipment with the DPD comprehensive treatment equipment, is used for CFR equipment and the handled signal of DPD equipment are controlled and optimization process, realizes the mutual compensation between CFR equipment and the handled signal of DPD equipment.Here it is pointed out that because CFR equipment and DPD equipment are existing, therefore be not specifically addressed.
Here, CFR and DPD comprehensive treatment equipment are further used for adopting the processing mode of backstage control type or through type that CFR equipment and the handled signal of DPD equipment are controlled and optimization process.So, realize that the system that CFR and DPD compensate mutually comprises following two kinds of embodiments.
System embodiment one is: adopt at CFR and DPD comprehensive treatment equipment under the situation of processing mode of backstage control type, this moment, CFR equipment and DPD equipment were positioned on the primary link of signal input and output.As shown in Figure 6, in the present embodiment, realize that the system that CFR and DPD compensate mutually comprises: CFR equipment 111, DPD equipment 211 and CFR and DPD comprehensive treatment equipment 311.And CFR equipment 111 and DPD equipment 211 are positioned at input signal I_In and Q_In, and on the primary link at output signal I_Out and Q_Out place.
Wherein, CFR and DPD comprehensive treatment equipment 311 comprise CFR and DPD optimal module 3111, CFR control interactive module 3112 and DPD control interactive module 3113.
Here, CFR and DPD optimal module 3111 are used to set in advance the peak clipping parameter and issue; Via the correction result of CFR control interactive module 3112 receptions, and analyze and optimization process based on CFR equipment 111 under the peak clipping parameter of this setting; Via the correction result of DPD control interactive module 3113 receptions, and analyze and optimization process based on DPD equipment 211 under the peak clipping parameter of this setting.
Here, the detailed process that CFR and DPD optimal module 3111 are analyzed with optimization process is: at the correction result of the CFR equipment 111 that receives, if CFR and DPD optimal module 311 analyze the optimization result that the correction result of CFR equipment 111 under the peak clipping parameter of current this setting reaches expection, then the peak clipping parameter with current this setting is defined as optimum peak clipping parameter, finish to optimize, and stopping to issue of peak clipping parameter, CFR equipment 111 enters normal signal processing so.Correction result at the DPD equipment 211 that receives, if CFR and DPD optimal module 311 analyze the optimization result that the correction result of DPD equipment 211 under the peak clipping parameter of current this setting reaches expection, then the peak clipping parameter with current this setting is defined as optimum peak clipping parameter, finish to optimize, and stopping to issue of peak clipping parameter, DPD equipment 211 enters normal signal processing so.
CFR control interactive module 3112 is used for the peak clipping parameter of this setting is forwarded to CFR equipment 111, makes that CFR equipment 111 is follow-up can finish the configuration of relevant parameter and the correction of CFR equipment 111 processing procedures; CFR control interactive module 3112 will report CFR and DPD optimal module 3111 based on the correction result of CFR equipment 111 under the peak clipping parameter of this setting, be analyzed and optimization process by CFR and 3111 pairs of correction results of DPD optimal module; Afterwards, CFR control interactive module 3112 is obtained the optimization result from CFR and DPD optimal module 3111, and should optimize the result, peak clipping parameter such as up-to-date setting is transmitted to CFR equipment 111, makes CFR equipment 111 finish the configuration of relevant parameter and the correction of CFR equipment 111 processing procedures based on this optimization result.
DPD control interactive module 3113 is used for the peak clipping parameter of this setting is forwarded to DPD equipment 211, makes that DPD equipment 211 is follow-up can finish the configuration of relevant parameter and the correction of DPD equipment 211 processing procedures; DPD control interactive module 3113 will report CFR and DPD optimal module 3111 based on the correction result of DPD equipment 211 under the peak clipping parameter of this setting, be analyzed and optimization process by CFR and 3111 pairs of correction results of DPD optimal module; Afterwards, DPD control interactive module 3113 is obtained the optimization result from CFR and DPD optimal module 3111, and should optimize the result, peak clipping parameter such as up-to-date setting is transmitted to DPD equipment 211, makes DPD equipment 211 finish the configuration of relevant parameter and the correction of DPD equipment 211 processing procedures based on this optimization result.
Here it is pointed out that at CFR and DPD optimal module 3111 its major function and effect comprise the content of four aspects.First aspect by CFR control interactive module 3112, changes the peak clipping parameter of CFR equipment 111 as required.Second aspect receives CFR equipment 111 and the process information of DPD equipment 211 under different peak clipping parameters, carries out self-adaptive processing and complex optimum and handles, and determines optimum peak clipping parameter.The third aspect is controlled the relevant parameter that interactive module 3112 disposes CFR equipment 111 by CFR, and the processing procedure of CFR equipment 111 is revised.Fourth aspect by DPD control interactive module 3113, disposes the relevant parameter of DPD equipment 211, and the processing procedure of DPD equipment 211 is revised, such as the content of predistortion form is revised.
At CFR control interactive module 3112, its major function and effect comprise the content of three aspects.First aspect is subjected to the control of CFR and DPD optimal module 3111, and control CFR equipment 111 is adjusted the peak clipping parameter such as the peak clipping thresholding.Second aspect receives the process information of CFR equipment 111 under different peak clipping parameters, such as peak clipping parameter information, peak value process information, and reports to CFR and DPD optimal module 3111.The third aspect is subjected to the control of CFR and DPD optimal module 3111, adjusts and dispose the relevant parameter of CFR equipment 111, and based on the optimization result of CFR and DPD optimal module 3111 processing procedure of CFR equipment 111 is revised.
At DPD control interactive module 3113, its major function and effect comprise the content of two aspects.First aspect receives the process information of DPD equipment 211 under different peak clipping parameters, pays close attention under the different peak clipping parameters DPD equipment 211 to the processing costs of some peak points, and reports to CFR and DPD optimal module 3111.Second aspect, be subjected to the control of CFR and DPD optimal module 3111, adjust and dispose the relevant parameter of DPD equipment 211, and the processing procedure of DPD equipment 211 is revised, for example the predistortion form is revised based on the optimization result of CFR and DPD optimal module 3111.
System embodiment two: adopt at CFR and DPD comprehensive treatment equipment under the situation of processing mode of through type, this moment, CFR and DPD comprehensive treatment equipment were positioned on the primary link of signal input and output.As shown in Figure 7, in the present embodiment, realize that the system that CFR and DPD compensate mutually comprises: CFR equipment 121, DPD equipment 221 and CFR and DPD comprehensive treatment equipment 321.And CFR and DPD comprehensive treatment equipment 321 are positioned at input signal I_In and Q_In, and on the primary link at output signal I_Out and Q_Out place.
Wherein, CFR and DPD comprehensive treatment equipment 321 comprise CFR and DPD optimal module 3211, CFR control interactive module 3212 and DPD control interactive module 3213.
Here, CFR and DPD optimal module 3211 are used to set in advance the peak clipping parameter and issue; With the straight-through tupe of handling, be that CFR and DPD optimal module 3211 directly receive the correction result based on CFR equipment 121 and DPD equipment 221 under the peak clipping parameter of this setting, and the correction result of CFR equipment 121 and DPD equipment 221 is synthetically analyzed and optimization process.Here, also can be understood as under the acting in conjunction of CFR and DPD optimal module 3211, CFR equipment 121 and DPD equipment 221, CFR and DPD optimal module 3211 are directly carried out again optimization process to the correction result of CFR equipment 121 and the correction result of DPD equipment 221, finish the adaptive complex optimum of CFR and DPD optimal module 3211 and handle.
CFR control interactive module 3212 is used for the peak clipping parameter of this setting is forwarded to CFR equipment 121, and control CFR equipment 121 adopts the straight-through tupe of handling, to report CFR and DPD optimal module 3211 based on the correction result of CFR equipment 121 under the peak clipping parameter of this setting, after carrying out comprehensive analysis and optimization process by CFR and 3211 pairs of correction results of DPD optimal module, make that CFR equipment 121 is follow-up can finish the configuration of relevant parameter and the correction of CFR equipment 121 processing procedures.
DPD control interactive module 3213 is used for the peak clipping parameter of this setting is forwarded to DPD equipment 221, and control DPD equipment 221 adopts the straight-through tupe of handling, to report CFR and DPD optimal module 3211 based on the correction result of DPD equipment 221 under the peak clipping parameter of this setting, after carrying out comprehensive analysis and optimization process by CFR and 3211 pairs of correction results of DPD optimal module, make that DPD equipment 221 is follow-up can finish the configuration of relevant parameter and the correction of DPD equipment 221 processing procedures.
Here it is pointed out that at CFR and DPD optimal module 3211 its major function and effect comprise the content of four aspects.First aspect can be done straight-through the processing to CFR equipment 121 and DPD equipment 221 as required.Second aspect is carried out the adjustment and the configuration of relevant parameter by 3212 pairs of CFR equipment of CFR control interactive module 121, such as the change of peak clipping parameter.The third aspect is carried out the adjustment and the configuration of relevant parameter by 3213 pairs of DPD equipment of DPD control interactive module 221.Fourth aspect, based on different peak clipping parameters, the result of CFR equipment 121 and the process information of DPD equipment 221 are carried out adaptive complex optimum processing, its tupe is directly the process information of the process information of CFR equipment 121 and DPD equipment 221 to be carried out once more optimization process, just under the acting in conjunction of CFR and DPD optimal module 3211, CFR equipment 121 and DPD equipment 221, the adaptive complex optimum that promptly adopts the straight-through tupe of handling to finish CFR and DPD optimal module 3211 is handled.Here, it is pointed out that the optimization process that is realized in the system, system embodiment one is different from system embodiment two, be the interaction of passing through respectively between CFR equipment 111 and CFR and the DPD optimal module 3111, finish the self adaptation correction and the optimizing process of CFR equipment 111; And the interaction between DPD equipment 211 and CFR and the DPD optimal module 3111, finish the self adaptation correction and the optimizing process of DPD equipment 211, thereby the complex optimum of having realized CFR and DPD optimal module 3111 is handled.
At CFR control interactive module 3212, its major function and effect comprise the content of two aspects.First aspect is subjected to the control of CFR and DPD optimal module 3211, and control CFR equipment 121 is adjusted the peak clipping parameter such as the peak clipping thresholding.Second aspect receives the process information of CFR equipment 121 under different peak clipping parameters, such as peak clipping parameter information, peak value process information etc., and reports to CFR and DPD optimal module 3211.
At DPD control interactive module 3213, its major function comprises with effect: receive the process information of DPD equipment 221 under different peak clipping parameters, pay close attention under the different peak clipping parameters DPD equipment 221 to the processing costs of some peak points, and report to CFR and DPD optimal module 3211.
As shown in Figure 8, the method that a kind of CFR of realization and DPD compensate mutually, this method may further comprise the steps:
Here, because CFR and DPD comprehensive treatment equipment can adopt the processing mode of backstage control type or through type that CFR equipment and the handled signal of DPD equipment are controlled and optimization process, realize the mutual compensation between CFR equipment and the handled signal of DPD equipment.Therefore, under the different disposal mode, specific implementation flow process of the present invention is different.And, adopt the difference of the processing mode of backstage control type or through type to be, the backstage control type is respectively CFR equipment or DPD equipment to be analyzed and optimization process by CFR in CFR and the DPD comprehensive treatment equipment and DPD optimal module, reaches the effect that realizes compensation on primary link.Also can be understood as the arbitrary equipment in CFR equipment and the DPD equipment, by and CFR and DPD optimal module between independently, adaptive optimization process, reach on primary link the effect that realizes compensation.And through type is by the acting in conjunction between CFR equipment and DPD equipment and CFR and the DPD optimal module, CFR and DPD optimal module be after will be optimized to the correction result of CFR equipment, exporting to DPD equipment revises, correction result to DPD equipment is optimized again afterwards, just carry out comprehensive optimization process, thereby reach the effect that on primary link, realizes compensation at CFR and DPD optimal module inside.
Below when CFR and DPD comprehensive treatment equipment adopted the different disposal mode, different specific implementation flow processs of the present invention are set forth.
When CFR and DPD comprehensive treatment equipment adopted the processing mode of backstage control type, specific implementation flow process of the present invention may further comprise the steps:
Step 211, CFR and DPD optimal module set in advance the peak clipping parameter and issue.
Step 212, CFR control interactive module are forwarded to CFR equipment with this peak clipping parameter, and will report CFR and DPD optimal module based on the correction result of CFR equipment under this peak clipping parameter.
Step 213, DPD control interactive module are forwarded to DPD equipment with this peak clipping parameter, and will report CFR and DPD optimal module based on the correction result of DPD equipment under this peak clipping parameter.
Step 214, CFR and DPD optimal module are controlled the correction result of interactive module reception based on CFR equipment under this peak clipping parameter via CFR, and analyze and optimization process; CFR control interactive module will be transmitted to CFR equipment from the optimization result that CFR and DPD optimal module are obtained, and make CFR equipment optimize the result based on this and finish the configuration of relevant parameter and the correction of CFR device processes process.
Step 215, CFR and DPD optimal module are controlled the correction result of interactive module reception based on DPD equipment under this peak clipping parameter via DPD, and analyze and optimization process; DPD control interactive module will be transmitted to DPD equipment from the optimization result that CFR and DPD optimal module are obtained, and make DPD equipment optimize the result based on this and finish the configuration of relevant parameter and the correction of DPD device processes process.
Step 216, change execution in step 214 over to, after CFR and DPD optimal module were determined optimum peak clipping parameter, CFR and DPD optimal module stopped to issue of peak clipping parameter.
When CFR and DPD comprehensive treatment equipment adopted the processing mode of through type, specific implementation flow process of the present invention may further comprise the steps:
Step 221, CFR and DPD optimal module set in advance the peak clipping parameter and issue.
Step 222, CFR control interactive module are forwarded to CFR equipment with this peak clipping parameter, and the straight-through tupe of handling of control CFR equipment employing, will report CFR and DPD optimal module based on the correction result of CFR equipment under this peak clipping parameter.
Step 223, DPD control interactive module are forwarded to DPD equipment with this peak clipping parameter, and the straight-through tupe of handling of control DPD equipment employing, will report CFR and DPD optimal module based on the correction result of DPD equipment under this peak clipping parameter.
Step 224, CFR and DPD optimal module are with the straight-through tupe of handling, directly receive correction result based on CFR equipment and described DPD equipment under this peak clipping parameter, and to the correction result of CFR equipment and DPD equipment synthetically analyze with optimization process after, synthetically adjust CFR equipment and DPD equipment, make CFR equipment and described DPD equipment optimize the result and finish the configuration of relevant parameter and the correction of processing procedure based on this.
Step 225, change execution in step 224 over to, after CFR and DPD optimal module were determined optimum peak clipping parameter, CFR and DPD optimal module stopped to issue of peak clipping parameter.
Here, it is pointed out that different specific implementation flow processs of the present invention when adopting the different disposal mode, also comprise step after any the final step in two specific implementation flow processs at above-mentioned CFR and DPD comprehensive treatment equipment:
In CFR and DPD comprehensive treatment equipment, the current definite final optimization pass result of CFR and DPD optimal module, peak clipping parameter such as optimum is monitored in real time, when environment and condition change when causing the process result degrades of CFR and DPD comprehensive treatment equipment, any initial step of returning in two specific implementation flow processs is carried out again circular treatment.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (9)
1, a kind of system that realizes that peak clipping and digital pre-distortion compensate mutually, this system comprises peak clipping CFR equipment and digital pre-distortion DPD equipment, it is characterized in that, this system also comprises CFR and DPD comprehensive treatment equipment, be used for described CFR equipment and the handled signal of described DPD equipment are controlled and optimization process, realize the mutual compensation between CFR equipment and the handled signal of DPD equipment.
2, system according to claim 1, it is characterized in that described CFR and DPD comprehensive treatment equipment are further used for adopting the processing mode of backstage control type or through type that described CFR equipment and the handled signal of described DPD equipment are controlled and optimization process.
3, system according to claim 2 is characterized in that, under the state that adopts described backstage control type processing mode, described CFR and DPD comprehensive treatment equipment comprise CFR and DPD optimal module, CFR control interactive module and DPD control interactive module; Wherein,
CFR and DPD optimal module are used to set in advance the peak clipping parameter and issue; Via the correction result of CFR control interactive module reception, and analyze and optimization process based on described CFR equipment under the described peak clipping parameter; Via the correction result of DPD control interactive module reception, and analyze and optimization process based on described DPD equipment under the described peak clipping parameter;
CFR controls interactive module, is used for described peak clipping parameter is forwarded to described CFR equipment, and will reports described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter; To be transmitted to described CFR equipment from the optimization result that CFR and DPD optimal module are obtained, and make CFR equipment finish the configuration of relevant parameter and the correction of CFR device processes process based on described optimization result;
DPD controls interactive module, is used for described peak clipping parameter is forwarded to described DPD equipment, and will reports described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter; To be transmitted to described DPD equipment from the optimization result that CFR and DPD optimal module are obtained, and make DPD equipment finish the configuration of relevant parameter and the correction of DPD device processes process based on described optimization result.
4, system according to claim 2 is characterized in that, under the state that adopts described through type processing mode, described CFR and DPD comprehensive treatment equipment comprise CFR and DPD optimal module, CFR control interactive module and DPD control interactive module; Wherein,
CFR and DPD optimal module are used to set in advance the peak clipping parameter and issue; Directly receive correction result with the straight-through tupe of handling, and the correction result of CFR equipment and DPD equipment is synthetically analyzed and optimization process based on described CFR equipment and described DPD equipment under the described peak clipping parameter;
CFR controls interactive module, is used for described peak clipping parameter is forwarded to described CFR equipment, and the straight-through tupe of handling of control CFR equipment employing, will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
DPD controls interactive module, is used for described peak clipping parameter is forwarded to described DPD equipment, and the straight-through tupe of handling of control DPD equipment employing, will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
5, a kind of method that realizes that peak clipping and digital pre-distortion compensate mutually is characterized in that, this method may further comprise the steps:
A, set in advance the peak clipping parameter and issue; CFR equipment and DPD equipment report CFR and DPD comprehensive treatment equipment with correction result after revising based on described peak clipping parameter;
B, described CFR and DPD comprehensive treatment equipment are by obtaining described correction result, and will analyze and the optimization result that optimizes acquisition returns to the reciprocal process of described CFR equipment and described DPD equipment correction result, realize the mutual compensation between CFR equipment and the handled signal of DPD equipment.
6, method according to claim 5 is characterized in that, when described CFR and DPD comprehensive treatment equipment adopt the processing mode of backstage control type,
Steps A is specially:
A11, CFR and DPD optimal module set in advance the peak clipping parameter and issue;
A12, CFR control interactive module is forwarded to described CFR equipment with described peak clipping parameter, and will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
A13, DPD control interactive module is forwarded to described DPD equipment with described peak clipping parameter, and will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
7, method according to claim 6 is characterized in that, step B is specially:
B11, described CFR and DPD optimal module are controlled the correction result of interactive module reception based on described CFR equipment under the described peak clipping parameter via described CFR, and analyze and optimization process; CFR control interactive module will be transmitted to CFR equipment from the optimization result that CFR and DPD optimal module are obtained, and make CFR equipment finish the configuration of relevant parameter and the correction of CFR device processes process based on described optimization result;
B12, described CFR and DPD optimal module are controlled the correction result of interactive module reception based on described DPD equipment under the described peak clipping parameter via described DPD, and analyze and optimization process; DPD control interactive module will be transmitted to DPD equipment from the optimization result that CFR and DPD optimal module are obtained, and make DPD equipment finish the configuration of relevant parameter and the correction of DPD device processes process based on described optimization result;
B13, after described CFR and DPD optimal module are determined optimum peak clipping parameter, stop to issue of peak clipping parameter.
8, method according to claim 5 is characterized in that, when described CFR and DPD comprehensive treatment equipment adopt the processing mode of through type,
Steps A is specially:
A21, CFR and DPD optimal module set in advance the peak clipping parameter and issue;
A22, CFR control interactive module is forwarded to described CFR equipment with described peak clipping parameter, and the straight-through tupe of handling of control CFR equipment employing, will report described CFR and DPD optimal module based on the correction result of CFR equipment under the described peak clipping parameter;
A23, DPD control interactive module is forwarded to described DPD equipment with described peak clipping parameter, and controls the tupe that DPD equipment adopts described straight-through processing, will report described CFR and DPD optimal module based on the correction result of DPD equipment under the described peak clipping parameter.
9, method according to claim 8 is characterized in that, step B is specially:
B21, CFR and DPD optimal module are with the tupe of described straight-through processing, directly receive correction result based on described CFR equipment and described DPD equipment under the described peak clipping parameter, and to the correction result of CFR equipment and DPD equipment synthetically analyze with optimization process after, synthetically adjust CFR equipment and the configuration of DPD equipment relevant parameter and the correction of processing procedure;
B22, after described CFR and DPD optimal module are determined optimum peak clipping parameter, stop to issue of peak clipping parameter.
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