CN208386542U - A kind of digital pre-distortion repeater - Google Patents
A kind of digital pre-distortion repeater Download PDFInfo
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- CN208386542U CN208386542U CN201820923551.9U CN201820923551U CN208386542U CN 208386542 U CN208386542 U CN 208386542U CN 201820923551 U CN201820923551 U CN 201820923551U CN 208386542 U CN208386542 U CN 208386542U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model relates to technical field of communication equipment, especially a kind of digital pre-distortion repeater.It includes that it includes microprocessor, for the radio frequency analog signal of input to be converted to the radiofrequency signal input link of digital signal, it is controlled by microprocessor with the field programmable gate array for carrying out high sampling to the digital signal inputted by radiofrequency signal input link, it is controlled by microprocessor and the methods of digital predistortion integrator of DPD peak clipping processing is carried out and the radiofrequency signal output link for being converted to analog signal and externally forwarding analog signal by radio-frequency antenna the digital signal of number correction integrator output with the digital sampled signal for exporting to field programmable gate array.The utility model can effectively enhance the output power signal of entire repeater and reduce the power consumption of entire repeater；Enhance the adaptive ability of repeater in combination with DPD peak clipping technology simultaneously and guarantee that signal is undistorted.
Description
Technical field
The utility model relates to technical field of communication equipment, especially a kind of digital pre-distortion repeater.
Background technique
With the development of wireless communication and Technology of Mobile Multimedia, the application of high power, inexpensive digital high-frequency amplification station is got over
Come more extensive and be common in privately owned flat including the operators such as movement, telecommunications, connection public network platform and public security, army etc.
Platform；In communication network covering, digital high-frequency amplification station is that key one of is set, and after being mainly used for realizing and amplifying wireless signal, is led to
Aerial radiation is crossed to space to increase signal cover and eliminate the covering blind spot of communication base station.But due to radio-frequency power
Amplifier be inherently it is nonlinear, this makes the delivery efficiency of digital high-frequency amplification station receive very big inhibition；Meanwhile power
Amplifier all has memory effect, and this memory effect has also seriously affected the output power of repeater, to largely effect on
Network overlapping effect and terminal receive performance.
Therefore, the delivery efficiency to improve repeater, it is necessary to which a kind of digital high-frequency amplification station with predistortion function is provided.
Utility model content
In view of the deficiency of the prior art, the purpose of this utility model is to provide a kind of digital pre-distortions directly to put
It stands.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of digital pre-distortion repeater, it includes microprocessor, for the radio frequency analog signal of input to be converted to number
The radiofrequency signal input link of word signal is controlled by microprocessor for believing the number inputted by radiofrequency signal input link
It number carries out the field programmable gate array of high sampling, be controlled by microprocessor for field programmable gate battle array
The digital sampled signal of column output carries out the methods of digital predistortion integrator of DPD peak clipping processing and for number to be corrected integrator
The digital signal of output is converted to analog signal and exports chain by the radiofrequency signal that radio-frequency antenna externally forwards analog signal
Road；
The signal output end of the radiofrequency signal input link is connected to the digital signal of field programmable gate array
Input terminal, the radiofrequency signal output link are connected to the digital signal output end of number correction integrator, the number correction
The digital signal input end of integrator is connected to the digital signal output end of field programmable gate array.
Preferably, the radiofrequency signal input link includes for carrying out signal decaying to the radio frequency analog signal of input
The first medium filtering that second numerical-control attenuator, the analog signal for exporting to the second numerical-control attenuator are filtered
Device, the analog signal for exporting first medium filter are converted to the frequency mixer of analog intermediate frequency signal, are used for frequency mixer
The analog intermediate frequency signal of output carries out the intermediate frequency amplifier of power amplification and the intermediate frequency simulation for exporting intermediate frequency amplifier
Signal is converted to the first analog-digital converter that field programmable gate array is input to after digital intermediate frequency signal；Second number
Control attenuator, first medium filter, frequency mixer, intermediate frequency amplifier and the first analog-digital converter are sequentially connected and can be compiled on site
The digital signal input end of journey logic gate array, and the regulation end of the field programmable gate array and the second numerical control attenuation
Device is connected to regulate and control the second numerical-control attenuator to the dough softening of analog signal.
Preferably, the radiofrequency signal output link includes the signal output for being sequentially connected to methods of digital predistortion integrator
End is converted to the second digital analog converter of analog intermediate frequency signal with the digital signal for exporting number correction integrator, uses
The second quadrature modulator of radiofrequency signal is modulated in the analog intermediate frequency signal for exporting the second digital analog converter, is used for second
The radiofrequency signal of quadrature modulator output carries out the second amplifier of a power amplification, for penetrating to the second amplifier output
Frequency signal carries out the 4th numerical-control attenuator of signal attenuation processing, the radiofrequency signal for exporting to the 4th numerical-control attenuator carries out
The third dielectric filter of filtering processing, the radiofrequency signal for exporting to third dielectric filter carry out secondary power amplification
Power amplifier and signal coupler for being attached with radio-frequency antenna, the tune of the field programmable gate array
Control end is connected to regulate and control the 4th numerical-control attenuator to the dough softening of radiofrequency signal with the 4th numerical-control attenuator.
Preferably, it further includes for the radiofrequency signal exported via radiofrequency signal output link to be sampled and fed back
To number correction integrator so that number correction integrator is anti-to the radiofrequency signal for receiving digital signal progress DPD peak clipping processing
Link is presented, the radio frequency signal feedback link includes that the radio frequency analog signal for exporting to signal coupler carries out signal decaying
The second medium that the third numerical-control attenuator of processing, the analog signal for exporting to third numerical-control attenuator are filtered
Filter, the analog signal for exporting to second medium filter are demodulated into the quadrature demodulator of analog intermediate frequency signal, are used for
First amplifier of power amplification is carried out to the analog intermediate frequency signal of quadrature demodulator output and for the first amplifier is defeated
Analog intermediate frequency signal out is converted to digital signal and is input to the second analog-digital converter of number correction integrator；Described second
Analog-digital converter, the first amplifier, quadrature demodulator, second medium filter and third numerical-control attenuator are sequentially connected to number
Between the digital signal samples end and signal coupler of word predistortion integrator.
Preferably, it further includes a calibration signal monitoring link being connected with field programmable gate array, the school
Calibration signal monitoring link include be linked in sequence on site the first digital analog converter of the signal output end of programmable gate array,
First quadrature modulator and the first numerical-control attenuator.
As the above scheme is adopted, the utility model can effectively enhance output power signal and the reduction of entire repeater
The power consumption of entire repeater；Simultaneously by will microprocessor, number correction integrator and field programmable gate array between
System structure arrange in pairs or groups in combination with DPD peak clipping technology realize in advance analysis signal condition, judge signal modulation mode (and signal band
Width, peak-to-average force ratio etc.), automatic adjustment output signal etc. function, to enhance the adaptive ability of repeater, guarantee signal not
Distortion.
Detailed description of the invention
Fig. 1 is the system control principle block diagram of the utility model embodiment.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
As shown in Figure 1, a kind of digital pre-distortion repeater provided by the embodiment of the utility model, it includes microprocessor a
(that is: playing the MCU of central control action), the radiofrequency signal for the radio frequency analog signal of input to be converted to digital signal are defeated
Incoming link is controlled by microprocessor a for carrying out high sampling to the digital signal inputted by radiofrequency signal input link
Field programmable gate array c (that is: FPGA), it is controlled by microprocessor a for defeated to field programmable gate array c
(it can use OP6180 to the methods of digital predistortion integrator b of digital sampled signal progress DPD peak clipping processing out as the case may be
Type integrated circuit) and for the digital signal of number correction integrator b output to be converted to analog signal and by radio frequency day
The radiofrequency signal output link that line d externally forwards analog signal；Wherein, the signal output end connection of radiofrequency signal input link
The digital signal input end of programmable gate array c on site, radiofrequency signal output link are connected to number correction integrator b
Digital signal output end, and number correction integrator b digital signal input end be then connected to field programmable gate battle array
Arrange the digital signal output end of c.
It is realized as a result, using radiofrequency signal input link and radiofrequency signal output link to the signal of input and the letter of output
Number modulation and power amplification input/output, can be whole to reduce by way of enhancing the output power signal of entire repeater
The power consumption of a repeater simultaneously provides accurate signal source and good outgoing route for the signal processing unit of repeater,
In, by the way that system structure collocation between microprocessor a, number correction integrator b and field programmable gate array c can be made
Come for digital pre-distortion processing module using combinable DPD (that is: Digital Pre-Distortion, digital pre-distortion) is cut
Peak technology, which is realized, to be analyzed signal condition in advance, judges signal modulation mode (and signal bandwidth, peak-to-average force ratio etc.), automatic adjustment output
Signal etc. function, to enhance the adaptive ability of repeater, guarantee that signal is undistorted.
To guarantee field programmable gate array c to the sample effect of signal, to carry out for number correction integrator b
DPD peak clipping processing provides basis of signals, and the radiofrequency signal input link of the present embodiment includes for the radio frequency analog letter to input
Number carry out the second numerical-control attenuator 25 of signal decaying, the analog signal for exporting to the second numerical-control attenuator 25 is filtered
The first medium filter 24 of processing, the analog signal for exporting first medium filter 24 are converted to analog intermediate frequency signal
Frequency mixer 23, analog intermediate frequency signal for exporting to frequency mixer 23 carries out the intermediate frequency amplifier 22 of power amplification and is used for
Field programmable gate battle array is input to after the analog intermediate frequency signal that intermediate frequency amplifier 22 exports is converted to digital intermediate frequency signal
Arrange the first analog-digital converter 21 of c (it can use AD80206 type converter as the case may be)；Second numerical-control attenuator 25,
First medium filter 24, frequency mixer 23, intermediate frequency amplifier 22 and the first analog-digital converter 21 are sequentially connected and can be compiled on site
The digital signal input end of journey logic gate array c, and the regulation end of field programmable gate array c and the second numerical-control attenuator
25 are connected to regulate and control the second numerical-control attenuator 25 to the dough softening of analog signal.
For the power for guaranteeing the signal for being handled and being exported via repeater, the radiofrequency signal output link of the present embodiment
Including be sequentially connected to methods of digital predistortion integrator b signal output end with for by number correction integrator b output
Digital signal is converted to the second digital analog converter 41 of analog intermediate frequency signal, and (it can be converted using AD9122 type as the case may be
Device), the analog intermediate frequency signal for exporting the second digital analog converter 41 be modulated to the second quadrature modulator 42 of radiofrequency signal
(it can use ADL5375 type modulator as the case may be), the radiofrequency signal for exporting the second quadrature modulator 42 into
Second amplifier 43 of power amplification of row, the radiofrequency signal for exporting to the second amplifier 43 carry out signal attenuation processing
The 4th numerical-control attenuator 44, the third medium that is filtered of the radiofrequency signal for being exported to the 4th numerical-control attenuator 44
Filter 45, the radiofrequency signal for exporting to third dielectric filter 45 carry out the power amplifier 46 of secondary power amplification
(that is: HPA amplifying circuit) and signal coupler 47 for being attached with radio-frequency antenna d, wherein field programmable logic
The regulation end of gate array c is connected to regulate and control decaying of the 4th numerical-control attenuator 44 to radiofrequency signal with the 4th numerical-control attenuator 44
Degree.
DPD peak clipping processing is carried out to digital signal is received for auxiliary number correction integrator b, thus entire straight for enhancing
The adaptive ability at station is put, guarantees that signal is undistorted, the repeater of the present embodiment further includes for exporting to via radiofrequency signal
The radiofrequency signal of link output is sampled and feeds back to number correction integrator b so that number correction integrator b is to receiving
Digital signal carries out the radio frequency signal feedback link of DPD peak clipping processing, mainly includes for exporting to signal coupler 47
Third numerical-control attenuator 35, the mould for being exported to third numerical-control attenuator 35 of radio frequency analog signal progress signal attenuation processing
The second medium filter 34 that quasi- signal is filtered, the analog signal demodulation for being exported to second medium filter 34
For the quadrature demodulator 33 (it can use ADL5380 type demodulator as the case may be) of analog intermediate frequency signal, for orthogonal
The analog intermediate frequency signal that demodulator 33 exports carries out the first amplifier 32 of power amplification and for the first amplifier 32 is defeated
Analog intermediate frequency signal out be converted to digital signal and be input to number correction integrator b the second analog-digital converter 31 (it can
ADS62C17 type converter is used as the case may be)；Wherein, the second analog-digital converter 31, the first amplifier 32, quadrature demodulation
Device 33, second medium filter 34 and third numerical-control attenuator 35 are sequentially connected to the number letter of methods of digital predistortion integrator b
Number between sampling end and signal coupler 47.
In addition, for convenient for carrying out debugging and signal monitoring to repeater, the repeater of the present embodiment further includes one and scene
Programmable gate array c connected calibration signal monitors link, mainly includes the programmable gate on site that is linked in sequence
First digital analog converter 11 (it can use AD9122 type converter as the case may be) of the signal output end of array c, first
Quadrature modulator 12 (it can use ADL5375 type modulator as the case may be) and the first numerical-control attenuator 13.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported
Used in other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (5)
1. a kind of digital pre-distortion repeater, it is characterised in that: it includes microprocessor, the radio frequency analog signal for will input
It is converted to the radiofrequency signal input link of digital signal, is controlled by microprocessor for inputting to by radiofrequency signal input link
Digital signal carry out the field programmable gate array of high sampling, be controlled by microprocessor with for field-programmable
The digital sampled signal of logic gate array output carries out the methods of digital predistortion integrator of DPD peak clipping processing and for rectifying number
The digital signal of positive integrator output is converted to analog signal and is believed by the radio frequency that radio-frequency antenna externally forwards analog signal
Number output link；
The signal output end of the radiofrequency signal input link is connected to the digital signal input of field programmable gate array
End, the radiofrequency signal output link are connected to the digital signal output end of number correction integrator, and the number correction is integrated
The digital signal input end of device is connected to the digital signal output end of field programmable gate array.
2. a kind of digital pre-distortion repeater as described in claim 1, it is characterised in that: the radiofrequency signal input link packet
Include the second numerical-control attenuator for the radio frequency analog signal progress signal decaying to input, for defeated to the second numerical-control attenuator
The first medium filter that analog signal out is filtered, the analog signal for exporting first medium filter turn
It is changed to the frequency mixer of analog intermediate frequency signal, analog intermediate frequency signal for exporting to frequency mixer carries out the intermediate frequency amplification of power amplification
Device and analog intermediate frequency signal for exporting intermediate frequency amplifier are input to field-programmable after being converted to digital intermediate frequency signal
First analog-digital converter of logic gate array；Second numerical-control attenuator, first medium filter, frequency mixer, intermediate frequency amplification
Device and the first analog-digital converter are sequentially connected to the digital signal input end of field programmable gate array, and the scene
The regulation end of programmable gate array is connected to regulate and control the second numerical-control attenuator to analog signal with the second numerical-control attenuator
The dough softening.
3. a kind of digital pre-distortion repeater as described in claim 1, it is characterised in that: the radiofrequency signal output link packet
Include the signal output end for being sequentially connected to methods of digital predistortion integrator with for by number correction integrator output number
Signal is converted to the second digital analog converter of analog intermediate frequency signal, the analog intermediate frequency signal for exporting the second digital analog converter
It is modulated to the second quadrature modulator of radiofrequency signal, the radiofrequency signal for exporting the second quadrature modulator carries out a power
Second amplifier of amplification, the radiofrequency signal for exporting to the second amplifier carry out the 4th numerical control attenuation of signal attenuation processing
Third dielectric filter that device, the radiofrequency signal for exporting to the 4th numerical-control attenuator are filtered, for third
The radiofrequency signal of dielectric filter output carries out the power amplifier of secondary power amplification and for being connected with radio-frequency antenna
The signal coupler connect, the regulation end of the field programmable gate array are connected to regulate and control the 4th with the 4th numerical-control attenuator
The dough softening of the numerical-control attenuator to radiofrequency signal.
4. a kind of digital pre-distortion repeater as claimed in claim 3, it is characterised in that: it further includes for via radio frequency
The radiofrequency signal of signal output link output is sampled and feeds back to number correction integrator so that number corrects integrator pair
The radio frequency signal feedback link that digital signal carries out DPD peak clipping processing is received, the radio frequency signal feedback link includes being used for
The third numerical-control attenuator of signal attenuation processing is carried out, for third numerical control to the radio frequency analog signal of signal coupler output
Second medium filter, the mould for being exported to second medium filter that the analog signal of attenuator output is filtered
Quasi- signal is demodulated into the quadrature demodulator of analog intermediate frequency signal, the analog intermediate frequency signal for exporting to quadrature demodulator carries out function
First amplifier of rate amplification and the analog intermediate frequency signal for exporting the first amplifier are converted to digital signal and input
To the second analog-digital converter of number correction integrator；Second analog-digital converter, the first amplifier, quadrature demodulator,
Second medium filter and third numerical-control attenuator are sequentially connected to digital signal samples end and the letter of methods of digital predistortion integrator
Between number coupler.
5. a kind of digital pre-distortion repeater as described in claim 1, it is characterised in that: it further includes one and field-programmable
The connected calibration signal of logic gate array monitors link, and the calibration signal monitoring link includes being linked in sequence to may be programmed on site
The first digital analog converter, the first quadrature modulator and the first numerical-control attenuator of the signal output end of logic gate array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820923551.9U CN208386542U (en) | 2018-06-14 | 2018-06-14 | A kind of digital pre-distortion repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820923551.9U CN208386542U (en) | 2018-06-14 | 2018-06-14 | A kind of digital pre-distortion repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208386542U true CN208386542U (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820923551.9U Active CN208386542U (en) | 2018-06-14 | 2018-06-14 | A kind of digital pre-distortion repeater |
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| Country | Link |
|---|---|
| CN (1) | CN208386542U (en) |
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2018
- 2018-06-14 CN CN201820923551.9U patent/CN208386542U/en active Active
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