CN101827062B - Peak clipping compensating device with peak clipping unit threshold and transmitter - Google Patents
Peak clipping compensating device with peak clipping unit threshold and transmitter Download PDFInfo
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Abstract
The invention discloses a peak clipping compensating device with a peak clipping unit threshold and a transmitter. The peak clipping compensating device comprises a power detecting unit, a saturated power detecting unit, a saturation point self-adapting computing unit, a peak clipping threshold optimizing unit and a feedback radio frequency unit, wherein the input end of the saturation point self-adapting computing unit and the input end of the power detecting unit are respectively connected with the output end of a peak clipping unit; the output end of the power detecting unit is sequentially connected with the control end of the saturation point self-adapting computing unit through the saturated power detecting unit; the output end of the saturation point self-adapting computing unit is connected with the peak clipping unit through the peak clipping threshold optimizing unit; the input end of the feedback radio frequency unit is connected with the output end of a power amplifier; and the output end of the feedback radio frequency unit is connected with the input end of the saturation point self-adapting computing unit. The invention does not need to set the threshold of the peak clipping unit according to a test threshold or a experience threshold, and improves the accuracy of the threshold of the peak clipping unit.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of peak clipping compensation arrangement and a kind of transmitter that peak clipping cell gate limit value is set.
Background technology
Continuous development along with wireless communication technology; The performance of wireless transmitter system has had very much progress; Current widely used transmitter system, the carrier number of the signal of transmission is more and more, has carried the more information amount; This peak that has just caused transmitting is all higher, has formed non-constant envelope signal.The high peak-to-average force ratio of this non-constant envelope signal has directly influenced the efficiency power amplifier and the linearity of transmitter system, influences the gain allocation of transmitter down link.So transmitter generally adopts the peak clipping technology at present, be used to reduce the peak-to-average force ratio of carrier signal, thereby improve the power of power amplifier, raise the efficiency and linearity.
In the prior art; The general structure of transmitter is to comprise peak clipping unit, digital pre-distortion unit, D/A conversion unit, radio frequency unit and power amplifier; The output of peak clipping unit is connected with power amplifier through digital pre-distortion unit, D/A conversion unit, radio frequency unit successively; Wherein the digital pre-distortion unit comprises the feedback radio frequency unit, and the output of this feedback radio frequency unit and said power amplifier is of coupled connections; The peak clipping unit carries out the peak clipping processing to the peak clipping base band data of input; The signal of feedback radio frequency unit coupled power amplifier output; Carry out down-conversion, analog-to-digital conversion for feeding back base band data; The digital pre-distortion unit relatively feeds back the base band data after base band data and peak clipping are handled, and the data after according to comparative result peak clipping being handled carry out outputing to D/A conversion unit after the pre-distortion, and the conversion of signals of D/A conversion unit after with this pre-distortion is analog signal; Convert radiofrequency signal into through after the upconversion process of radio frequency unit, this radiofrequency signal is launched through after the amplification of power amplifier.
Wherein, the internal structure of peak clipping unit is as shown in Figure 1, and it mainly comprises first delay unit, second delay unit, peak pulse offset unit, crosses thresholding peak search element, cancellation pulses generation unit, cancellation pulses forming unit.
The output of first delay unit is connected with the input of second delay unit and the input of cancellation pulses generation unit respectively, and the output of crossing the thresholding peak search element is connected with the peak pulse offset unit through the cancellation pulses generation unit;
First delay unit carries out delay process to the peak clipping base band data of input, and this delay time is identical with the time that the peak clipping base band data passed through the thresholding peak search element;
Second delay unit carries out delay process to the dateout of first delay unit, and this delay time is identical through the time of cancellation pulses generation unit and cancellation pulses forming unit with base band data;
Cross peak clipping base band data amplitude or power that the thresholding peak search element detects input in real time, search surpasses the peak value and the position of peak value in signal of thresholding, and Search Results is outputed to the cancellation pulses generation unit;
The cancellation pulses generation unit produces the cancellation pulses signal according to Search Results, and this cancellation pulses signal is outputed to the cancellation pulses forming unit; Base band data after this cancellation pulses signal and the first delay unit delay process is identical at the peak value of crossing the thresholding place, phase place is opposite;
The cancellation pulses forming unit carries out Filtering Processing to the cancellation pulses signal that produces, and when reducing the cancellation pulses signal peak, takes into account the index request of EVW and ACPR;
The peak pulse offset unit superposes the signal of second delay unit output and the cancellation pulses signal of cancellation pulses forming unit output, accomplishes the peak clipping processing to the base band data of input.
Wherein, cross in the thresholding peak search element, experience threshold value or test gate limit value are generally adopted in the setting of threshold value.The engineer is satisfying under the situation of system requirements; Composite factors such as power according to system gain distribution, power amplifier 1dB compression point; Consider to be provided with the threshold value of thresholding peak search element,, often adopt unified experience threshold value or test gate limit value for different equipment.
Yet because the system gain in the distinct device distributes, the composite factors such as power of power amplifier 1dB compression point differ greatly, according to test thresholding or experience threshold setting, accuracy is not high.
Summary of the invention
The invention provides a kind of peak clipping compensation arrangement and a kind of transmitter that peak clipping cell gate limit value is set, it can calculate the threshold value of peak clipping unit, improves the accuracy of peak clipping cell gate limit value.
Technical scheme of the present invention is: a kind of peak clipping compensation arrangement that peak clipping cell gate limit value is set, the output of peak clipping unit are connected with power amplifier through D/A conversion unit, radio frequency unit successively, and said peak clipping compensation arrangement comprises:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
Said saturation point self adaptation is calculated the input of unit and the input of power detecting unit is connected with the output of said peak clipping unit respectively; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The said feedback radio frequency unit signal of said power amplifier output that is coupled, and carry out down-conversion, analog-to-digital conversion is the feedback base band data; Said power detecting unit is calculated the downlink data performance number of said peak clipping unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
A kind of transmitter comprises peak clipping unit, D/A conversion unit, radio frequency unit and power amplifier, and the output of peak clipping unit is connected with power amplifier through said D/A conversion unit, radio frequency unit successively, and said transmitter also comprises:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
The output of said peak clipping unit also calculates the input of unit with said saturation point self adaptation respectively and the input of power detecting unit is connected; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The said feedback radio frequency unit signal of said power amplifier output that is coupled, and carry out down-conversion, analog-to-digital conversion is the feedback base band data; Said power detecting unit is calculated the downlink data performance number of said peak clipping unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
A kind of in addition transmitter; Comprise peak clipping unit, digital pre-distortion unit, D/A conversion unit, radio frequency unit and power amplifier; The output of peak clipping unit is connected with power amplifier through said digital pre-distortion unit, D/A conversion unit, radio frequency unit successively, and this transmitter also comprises:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized the unit;
The output of said peak clipping unit also calculates the input of unit with said saturation point self adaptation respectively and the input of power detecting unit is connected; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is optimized the unit through said peak clipping thresholding and is connected with said peak clipping unit, the input of said saturation point self adaptation calculating unit also with said digital pre-distortion unit in the feedback radio frequency unit be connected;
Said power detecting unit is calculated the downlink data performance number of said digital pre-distortion unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of the feedback radio frequency unit in the said digital pre-distortion unit of said digital pre-distortion unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
Peak clipping compensation arrangement and a kind of transmitter that peak clipping cell gate limit value is set of the present invention; It calculates saturation point numeric field performance number according to the downlink data of peak clipping unit output and the feedback base band data of feedback radio frequency unit output, and the out gate limit value was to the peak clipping unit after peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives; Output to the peak clipping unit through calculating threshold value in real time, need not improve the accuracy of peak clipping cell gate limit value by the threshold value of test thresholding or experience threshold setting peak clipping unit.
Description of drawings
Fig. 1 is the structural principle block diagram of prior art peak clipping unit;
Fig. 2 is a transmitter of the present invention structural principle block diagram in one embodiment;
Fig. 3 is a transmitter of the present invention structural principle block diagram in another embodiment;
Fig. 4 is a transmitter of the present invention structural principle block diagram in another embodiment.
Embodiment
Peak clipping compensation arrangement and a kind of transmitter that peak clipping cell gate limit value is set of the present invention; It calculates saturation point numeric field power according to the downlink data of peak clipping unit output and the feedback base band data of feedback radio frequency unit output, and the out gate limit value was to the peak clipping unit after peak clipping thresholding optimization unit carried out smoothing processing to saturation point numeric field power; Output to the peak clipping unit through calculating threshold value in real time, need not improve the accuracy of peak clipping cell gate limit value by the threshold value of test thresholding or experience threshold setting peak clipping unit.
Below in conjunction with accompanying drawing specific embodiment of the present invention is done a detailed elaboration.
Transmitter of the present invention; Like Fig. 2; Comprise, comprise that peak clipping unit, D/A conversion unit, radio frequency unit, power amplifier, power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
The output of said peak clipping unit is connected with power amplifier through said D/A conversion unit, radio frequency unit successively; The output of said peak clipping unit also calculates the input of unit with said saturation point self adaptation respectively and the input of power detecting unit is connected; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The signal of said feedback radio frequency unit coupled power amplifier output, and carry out down-conversion, analog-to-digital conversion for feeding back base band data; Said power detecting unit is calculated the downlink data performance number of exporting said peak clipping unit, and (this downlink data performance number can be the performance number of one or more scheduled durations of statistics; Perhaps count the mean value that the performance number of a plurality of scheduled durations obtains then earlier); (this preset performance number is predefined to said saturation power detecting unit with said downlink data performance number and preset performance number; Can rule of thumb maybe need set) do comparison; According to comparative result judge said power amplifier time that does not get into saturation condition and the time that gets into saturation condition (in this does not get into the time of saturation condition, said downlink data performance number less than or smaller or equal to said preset performance number; In this gets into the time of saturation condition; Said downlink data performance number greater than or more than or equal to said preset performance number); This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number (the saturation point numeric field performance number that calculates can have a plurality of), and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives, and the peak clipping unit carries out peak clipping according to the threshold value that receives to the base band data of importing to be handled.
Wherein, The saturation point self adaptation calculate the unit according to the first power gain value and the second power gain value calculate saturation point numeric field performance number detailed process can for: suppose that the first power gain value is A; The second power gain value is B, and when A-B=1dB, power amplifier reaches the saturation condition of 1dB compression; This numerical value B corresponding downlink data performance number is saturation point numeric field performance number.
Said peak clipping thresholding is optimized the unit when the saturation point numeric field performance number that receives is carried out smoothing processing; Earlier judge whether the saturation point numeric field performance number of up-to-date reception belongs to predetermined zone of reasonableness (this zone of reasonableness can be set a high value and a low value); Remove the saturation point numeric field performance number that does not belong to predetermined zone of reasonableness, carrying out after the smoothing processing to a plurality of saturation point numeric field performance numbers that receive is that exportable rational threshold value is to the peak clipping unit.
This shows; The present invention can calculate saturation point numeric field performance number by adaptometer; This saturation point numeric field performance number is optimized, then as the threshold value of peak clipping unit, thus the work of having saved research staff's test gate limit value; Improved the accuracy of threshold value greatly, and reduced because the application difficulty that the otherness of equipment is brought.
In the specific implementation; In order not influence the transmitter operate as normal; Like Fig. 3, also comprise peak clipping optimization threshold renewal trigger element and peak clipping optimization threshold storage control unit, said peak clipping optimization threshold storage control unit is connected said peak clipping thresholding and optimizes between unit and the said peak clipping unit; The input that said peak clipping optimization threshold is upgraded trigger element receives the base band data of importing, and output is connected with the control end of said peak clipping optimization threshold storage control unit;
Said peak clipping optimization threshold is upgraded the base band data of trigger element according to input, and the significant instant of search system protection time slot or idle time slot is exported triggering signal to said peak clipping optimization threshold storage control unit after searching said significant instant; Said peak clipping optimization threshold storage control unit is stored the threshold value that said peak clipping thresholding is optimized unit output, after the triggering signal that receives the output of said peak clipping optimization threshold renewal trigger element, upgrades the threshold value of said peak clipping unit.
The system protection time slot of the base band data through search input or the significant instant of idle time slot; After searching significant instant, go to upgrade the threshold value that the peak clipping unit is set again; Can not influence the operate as normal of transmitter, guarantee the continuity and the correctness of dateout.
In addition, transmitter of the present invention can also comprise that the base band data to the output of peak clipping unit carries out the digital pre-distortion unit of pre-distortion, like Fig. 3, is connected between said peak clipping unit and the D/A conversion unit; The output of said digital pre-distortion unit is connected with the input that the saturation point self adaptation is calculated the unit with the input of said power detecting unit respectively.The base band data of the peak clipping unit being exported through the digital pre-distortion unit carries out pre-distortion, can reduce the distortion factor of dateout.
Need to prove; Owing to include the feedback radio frequency unit in the digital pre-distortion processing unit under normal conditions; Then when transmitter of the present invention also comprised the digital pre-distortion unit, like Fig. 4, the input that the saturation point self adaptation is calculated the unit can be connected with the feedback radio frequency unit in the digital pre-distortion unit; And do not need to connect in addition again a feedback radio frequency unit, can save cost.
In addition, the invention also discloses a kind of peak clipping compensation arrangement that peak clipping cell gate limit value is set, wherein the output of peak clipping unit is connected with power amplifier through D/A conversion unit, radio frequency unit successively; This peak clipping compensation arrangement like Fig. 2, comprises, power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
Said saturation point self adaptation is calculated the input of unit and the input of power detecting unit is connected with the output of said peak clipping unit respectively; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The signal of said feedback radio frequency unit coupled power amplifier output, and carry out down-conversion, analog-to-digital conversion for feeding back base band data; Said power detecting unit is calculated the downlink data performance number of exporting said peak clipping unit, and (this downlink data performance number can be the performance number of one or more scheduled durations of statistics; Perhaps count the mean value that the performance number of a plurality of scheduled durations obtains then earlier); (this preset performance number is predefined to said saturation power detecting unit with said downlink data performance number and preset performance number; Can rule of thumb maybe need set) do comparison; According to comparative result judge said power amplifier time that does not get into saturation condition and the time that gets into saturation condition (in this does not get into the time of saturation condition, said downlink data performance number less than or smaller or equal to said preset performance number; In this gets into the time of saturation condition; Said downlink data performance number greater than or more than or equal to said preset performance number); This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number (the saturation point numeric field performance number that calculates can have a plurality of), and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives, and the peak clipping unit carries out peak clipping according to the threshold value that receives to the peak clipping base band data of importing to be handled.
Wherein, The saturation point self adaptation calculate the unit according to the first power gain value and the second power gain value calculate saturation point numeric field performance number detailed process can for: suppose that the first power gain value is A; The second power gain value is B, and when A-B=1dB, power amplifier reaches the saturation condition of 1dB compression; This numerical value B corresponding downlink data performance number is saturation point numeric field performance number.
Said peak clipping thresholding is optimized the unit when the saturation point numeric field performance number that receives is carried out smoothing processing; Earlier judge whether the saturation point numeric field performance number of up-to-date reception belongs to predetermined zone of reasonableness; Remove the saturation point numeric field performance number that does not belong to predetermined zone of reasonableness, carrying out after the smoothing processing to a plurality of saturation point numeric field performance numbers that receive is that exportable rational threshold value is to the peak clipping unit.
In the specific implementation; Peak clipping compensation arrangement of the present invention; Like Fig. 3, can also comprise that the peak clipping optimization threshold is upgraded trigger element and peak clipping optimization threshold storage control unit; Said peak clipping optimization threshold storage control unit is connected said peak clipping thresholding to be optimized between unit and the said peak clipping unit, and the output that said peak clipping optimization threshold is upgraded trigger element is connected with the control end of said peak clipping optimization threshold storage control unit;
Said peak clipping optimization threshold is upgraded the peak clipping base band data of trigger element according to input, and the significant instant of search system protection time slot or idle time slot is exported triggering signal to said peak clipping optimization threshold storage control unit after searching said significant instant; Said peak clipping optimization threshold storage control unit is stored the threshold value that said peak clipping thresholding is optimized unit output, after the triggering signal that receives the output of said peak clipping optimization threshold renewal trigger element, upgrades the threshold value of said peak clipping unit.
The system protection time slot of the peak clipping base band data through search input or the significant instant of idle time slot; After searching significant instant, go to upgrade the threshold value that the peak clipping unit is set again; Can not influence the operate as normal of system, guarantee the continuity and the correctness of dateout.
In addition, like Fig. 3, between said peak clipping unit and D/A conversion unit, also be connected with the digital pre-distortion unit that the base band data of said peak clipping unit output is carried out pre-distortion; The output of said digital pre-distortion unit is connected with the input that the saturation point self adaptation is calculated the unit with the input of said power detecting unit respectively.The base band data of the peak clipping unit being exported through the digital pre-distortion unit carries out pre-distortion, can reduce the distortion factor of dateout.
Need to prove; Owing to include the feedback radio frequency unit in the digital pre-distortion processing unit under normal conditions, then when between said peak clipping unit and D/A conversion unit, also being connected with the digital pre-distortion unit, peak clipping compensation arrangement of the present invention can not comprise the feedback radio frequency unit; Like Fig. 4; The input that the saturation point self adaptation is calculated the unit can be connected with the feedback radio frequency unit in the digital pre-distortion unit, and does not need to install in addition a feedback radio frequency unit again, can save cost.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (8)
1. peak clipping compensation arrangement that peak clipping cell gate limit value is set, the output of peak clipping unit are connected with power amplifier through D/A conversion unit, radio frequency unit successively, it is characterized in that said peak clipping compensation arrangement comprises:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
Said saturation point self adaptation is calculated the input of unit and the input of power detecting unit is connected with the output of said peak clipping unit respectively; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The said feedback radio frequency unit signal of said power amplifier output that is coupled, and carry out down-conversion, analog-to-digital conversion is the feedback base band data; Said power detecting unit is calculated the downlink data performance number of said peak clipping unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
2. the peak clipping compensation arrangement that peak clipping cell gate limit value is set according to claim 1 is characterized in that: between said peak clipping unit and D/A conversion unit, also be connected with the digital pre-distortion unit that the base band data of said peak clipping unit output is carried out pre-distortion; The output of said digital pre-distortion unit is connected with the input that the saturation point self adaptation is calculated the unit with the input of said power detecting unit respectively.
3. the peak clipping compensation arrangement that peak clipping cell gate limit value is set according to claim 1 and 2; It is characterized in that: also comprise peak clipping optimization threshold renewal trigger element and peak clipping optimization threshold storage control unit; Said peak clipping optimization threshold storage control unit is connected said peak clipping thresholding to be optimized between unit and the peak clipping unit, and the output that said peak clipping optimization threshold is upgraded trigger element is connected with the control end of said peak clipping optimization threshold storage control unit;
Said peak clipping optimization threshold is upgraded the peak clipping base band data of trigger element according to input, and the significant instant of search system protection time slot or idle time slot is exported triggering signal to said peak clipping optimization threshold storage control unit after searching said significant instant; Said peak clipping optimization threshold storage control unit is stored the threshold value that said peak clipping thresholding is optimized unit output, after the triggering signal that receives the output of said peak clipping optimization threshold renewal trigger element, upgrades the threshold value of said peak clipping unit.
4. a transmitter comprises peak clipping unit, D/A conversion unit, radio frequency unit and power amplifier, and the output of peak clipping unit is connected with power amplifier through said D/A conversion unit, radio frequency unit successively, it is characterized in that, also comprises:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized unit and feedback radio frequency unit;
The output of said peak clipping unit also calculates the input of unit with said saturation point self adaptation respectively and the input of power detecting unit is connected; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is connected with said peak clipping unit through said peak clipping thresholding optimization unit; The input of said feedback radio frequency unit and the output of said power amplifier are of coupled connections, and the output of said feedback radio frequency unit is connected with the input that said saturation point self adaptation is calculated the unit;
The said feedback radio frequency unit signal of said power amplifier output that is coupled, and carry out down-conversion, analog-to-digital conversion is the feedback base band data; Said power detecting unit is calculated the downlink data performance number of said peak clipping unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of said feedback radio frequency unit of said peak clipping unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
5. transmitter according to claim 4 is characterized in that: comprise that also the base band data to the output of said peak clipping unit that is connected between said peak clipping unit and the D/A conversion unit carries out the digital pre-distortion unit of pre-distortion; The output of said digital pre-distortion unit is connected with the input that the saturation point self adaptation is calculated the unit with the input of said power detecting unit respectively.
6. according to claim 4 or 5 described transmitters; It is characterized in that: also comprise peak clipping optimization threshold renewal trigger element and peak clipping optimization threshold storage control unit; Said peak clipping optimization threshold storage control unit is connected said peak clipping thresholding to be optimized between unit and the said peak clipping unit, and the output that said peak clipping optimization threshold is upgraded trigger element is connected with the control end of said peak clipping optimization threshold storage control unit;
Said peak clipping optimization threshold is upgraded the peak clipping base band data of trigger element according to input, and the significant instant of search system protection time slot or idle time slot is exported triggering signal to said peak clipping optimization threshold storage control unit after searching said significant instant; Said peak clipping optimization threshold storage control unit is stored the threshold value that said peak clipping thresholding is optimized unit output, after the triggering signal that receives the output of said peak clipping optimization threshold renewal trigger element, upgrades the threshold value of said peak clipping unit.
7. transmitter; Comprise peak clipping unit, digital pre-distortion unit, D/A conversion unit, radio frequency unit and power amplifier; The output of peak clipping unit is connected with power amplifier through said digital pre-distortion unit, D/A conversion unit, radio frequency unit successively; It is characterized in that, also comprise:
Power detecting unit, saturation power detecting unit, saturation point self adaptation are calculated the unit, the peak clipping thresholding is optimized the unit;
The output of said peak clipping unit also calculates the input of unit with said saturation point self adaptation respectively and the input of power detecting unit is connected; The output of said power detecting unit is connected through the control end that said saturation power detecting unit and saturation point self adaptation are calculated the unit successively; The output that said saturation point self adaptation is calculated the unit is optimized the unit through said peak clipping thresholding and is connected with said peak clipping unit, the input of said saturation point self adaptation calculating unit also with said digital pre-distortion unit in the feedback radio frequency unit be connected;
Said power detecting unit is calculated the downlink data performance number of said digital pre-distortion unit output; Said saturation power detecting unit is done comparison with said downlink data performance number and preset performance number; Judge that according to comparative result said power amplifier does not get into the time and the time that gets into saturation condition of saturation condition; This time that does not get into saturation condition is sent to said saturation point self adaptation with the time that gets into saturation condition calculate the unit; And when said downlink data performance number surpasses the preset power value; Calculate unit output triggering signal to said saturation point self adaptation; Said saturation point self adaptation is calculated the unit after receiving this triggering signal; Calculate the second power gain value in the first power gain value of feedback base band data in the said time that does not get into saturation condition and time that gets into saturation condition of downlink data and the output of the feedback radio frequency unit in the said digital pre-distortion unit of said digital pre-distortion unit output respectively, calculate saturation point numeric field performance number, and output to said peak clipping thresholding and optimize the unit according to the said first power gain value and the second power gain value; The out gate limit value was to said peak clipping unit after said peak clipping thresholding optimization unit carried out smoothing processing to the saturation point numeric field performance number that receives.
8. transmitter according to claim 7 is characterized in that: also comprises,
The peak clipping optimization threshold is upgraded trigger element and peak clipping optimization threshold storage control unit; Said peak clipping optimization threshold storage control unit is connected said peak clipping thresholding to be optimized between unit and the said peak clipping unit, and the output that said peak clipping optimization threshold is upgraded trigger element is connected with the control end of said peak clipping optimization threshold storage control unit;
Said peak clipping optimization threshold is upgraded the peak clipping base band data of trigger element according to input, and the significant instant of search system protection time slot or idle time slot is exported triggering signal to said peak clipping optimization threshold storage control unit after searching said significant instant; Said peak clipping optimization threshold storage control unit is stored the threshold value that said peak clipping thresholding is optimized unit output, after the triggering signal that receives the output of said peak clipping optimization threshold renewal trigger element, upgrades the threshold value of said peak clipping unit.
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| CN103546196B (en) * | 2012-07-12 | 2015-06-03 | 京信通信系统（中国）有限公司 | Method and device applied to broadband frequency hopping system to adjust peak clipping threshold value |
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| CN101076008A (en) * | 2007-07-17 | 2007-11-21 | 华为技术有限公司 | Method and apparatus for processing clipped wave |
| CN101582746A (en) * | 2009-06-22 | 2009-11-18 | 华为技术有限公司 | Method for sending signals and device |
| CN101662449A (en) * | 2009-09-17 | 2010-03-03 | 京信通信系统（中国）有限公司 | Window type peak clipping method |
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| US5384547A (en) * | 1993-08-02 | 1995-01-24 | Motorola, Inc. | Apparatus and method for attenuating a multicarrier input signal of a linear device |
| CN101076008A (en) * | 2007-07-17 | 2007-11-21 | 华为技术有限公司 | Method and apparatus for processing clipped wave |
| CN101582746A (en) * | 2009-06-22 | 2009-11-18 | 华为技术有限公司 | Method for sending signals and device |
| CN101662449A (en) * | 2009-09-17 | 2010-03-03 | 京信通信系统（中国）有限公司 | Window type peak clipping method |
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