CN108365862A - Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit - Google Patents
Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit Download PDFInfo
- Publication number
- CN108365862A CN108365862A CN201810058532.9A CN201810058532A CN108365862A CN 108365862 A CN108365862 A CN 108365862A CN 201810058532 A CN201810058532 A CN 201810058532A CN 108365862 A CN108365862 A CN 108365862A
- Authority
- CN
- China
- Prior art keywords
- signal
- harmonic
- frequency
- module
- baseband
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 230000003321 amplification Effects 0.000 claims description 61
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 61
- 238000012549 training Methods 0.000 claims description 23
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 17
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Abstract
The invention discloses a method for eliminating harmonic waves of a radio frequency circuit and the radio frequency circuit. The radio frequency circuit structure is that a baseband signal generated by a baseband signal generating module in a transmitting branch circuit is subjected to up-conversion by a first frequency converter and then input into a frequency mixer, the baseband signal is subjected to up-conversion by an anti-harmonic signal module and then generates an anti-harmonic signal, the anti-harmonic signal is subjected to up-conversion by a second frequency conversion module and then input into the frequency mixer, the frequency mixer mixes the frequency-converted baseband signal with the frequency-converted anti-harmonic signal and then outputs a mixing signal, and the mixing signal passes through a digital-to-analog converter and a radio frequency power amplifier and then outputs a radio; the radio frequency signal output by the radio frequency power amplifier in the feedback branch circuit is attenuated by the radio frequency attenuator and converted by the analog-to-digital converter, and then is subjected to down-conversion by the third frequency conversion module, and a feedback signal is output to the anti-harmonic signal module; the anti-harmonic signal module calculates an anti-harmonic coefficient based on the currently generated harmonic signal, the received baseband signal and the feedback signal, and generates an anti-harmonic signal based on the anti-harmonic coefficient.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of methods and radio circuit for eliminating radio circuit harmonic wave.
Background technology
In the field of communications, for the efficiency of increasing RF power amplifier, often RF power amplification is operated in close to full
On the inelastic region of point.Transmitting signal is because the non-linear of power amplifier will produce various interference signals, in addition in original signal carrier wave
Frequency nearby generates intermodulation distortion signal, and the bigger harmonic interference signals of power are generated also at each harmonic frequency, are caused
Spectral pollution interferes other communication channels.In order to inhibit RF power amplification in the case where ensureing that RF power amplification output power does not reduce
The intermodulation distortion of the non-linear interference to other channels, original signal carrier frequency can be eliminated using base band predistortion technology, and
Harmonic wave interference outside working frequency range is generally filtered out using external filters.For the wider working frequency range of transceiver, than
Such as 80M~2.4G, second harmonic, the triple-frequency harmonics etc. of the transmitting signal of minimum working frequency points may be fallen on working frequency range.Such as
Fruit will filter out harmonic interference signals using filter, need to be divided into a plurality of branch progress spatially selecting filtering for being operated in different frequency range,
Excessive volume can be occupied using multi-channel filter access, circuit structure is complicated.And the active devices such as coupler Harmonics elimination electricity
Road can not accomplish the Harmonics elimination of arbitrary harmonic frequency in working frequency range, can not be adjusted flexibly.Meanwhile existing base band DPD skills
Art can only eliminate the interference of the intermodulation signal near transmitted signal bandwidth range, for the harmonic wave interference far beyond feedback bandwidth range
Signal does not have any effect.
Invention content
The embodiment of the present invention provides a kind of method and radio circuit for eliminating radio circuit harmonic wave, for reducing radio frequency work(
The power for putting non-linear caused harmonic wave, avoids the interference to other channels.
In a first aspect, the present invention provides a kind of radio circuits, including：
Transmitting branch, including baseband signal generation module, the first frequency-variable module, frequency mixer, digital analog converter, radio-frequency power
Amplifier, anti-harmonic signal module and the second frequency-variable module, the baseband signal generation module connect with first frequency-variable module
It connects, first frequency-variable module is connect with the frequency mixer, first end and the baseband signal of the anti-harmonic signal module
Generation module connects, and the second end of the anti-harmonic signal module is connect with second frequency-variable module, the second frequency conversion mould
Block is connect with the frequency mixer, and the baseband signal that the baseband signal generation module generates is after the first frequency converter up-conversion
The frequency mixer is inputted, the baseband signal generates anti-harmonic signal, the anti-harmonic wave letter after the anti-harmonic signal module
Number input the frequency mixer after the second frequency-variable module up-conversion, the frequency mixer by after frequency conversion baseband signal and frequency conversion
Mixed frequency signal is exported after anti-harmonic signal mixing afterwards, the mixed frequency signal is put through the digital analog converter and the radio-frequency power
Radiofrequency signal is exported after big device；
Feedback branch, including radio frequency attenuator, analog-digital converter, third frequency-variable module, the radio frequency attenuator with it is described
Radio-frequency power amplifier connects, and the analog-digital converter is connect with the radio frequency attenuator, one end of the third frequency-variable module
It is connect with the analog-digital converter, the other end of the third frequency-variable module is connect with the anti-harmonic signal module, described to penetrate
The radiofrequency signal of frequency power amplifier output is after radio frequency attenuator decaying is converted with the analog-digital converter, then passes through institute
It states third frequency-variable module and carries out down coversion, output feedback signal to the anti-harmonic signal module；
Wherein, the anti-harmonic signal module based on the harmonic signal being currently generated, the baseband signal received with
And the feedback signal calculates anti-harmonic constant, and the anti-harmonic signal generated based on the anti-harmonic constant.
Optionally, the anti-harmonic signal module includes：
Training signal module, for generating the harmonic signal for being modulated to harmonic frequency；
RF power amplification Harmonic Modeling module, for being based on the harmonic signal, the baseband signal and the feedback letter
Number the nonlinear channel of RF power amplification harmonic frequency is modeled, channel model is obtained, by the corresponding letter of the channel model
Road parameter is passed to anti-harmonic constant computing module；
The anti-harmonic constant computing module, for based on the baseband signal, the harmonic signal, the feedback signal
And the channel parameter, it calculates and obtains anti-harmonic constant, the anti-harmonic constant is sent to anti-harmonic generation module；
The anti-harmonic generation module generates anti-harmonic signal for being based on the anti-harmonic constant.
Optionally, the anti-harmonic signal module further includes：
Signal alignment module is connect with the training signal module and the RF power amplification Harmonic Modeling module respectively, is used
It is aligned in by the harmonic signal, the baseband signal and the feedback signal, the signal after alignment is sent to described penetrate
Frequency power amplifier Harmonic Modeling module is modeled.
Optionally, the anti-harmonic signal module further includes：
Gating signal module is connect respectively with the training signal module and the anti-harmonic generation module, in initial shape
State, the gating signal module control the anti-harmonic signal module and export the harmonic signal that the training signal module generates,
When the anti-harmonic generation module generates anti-harmonic signal, it is defeated that the gating signal module controls the anti-harmonic signal module
Go out the anti-harmonic signal.
Optionally, the RF power amplification Harmonic Modeling module is additionally operable to：
Based on the harmonic signal, the baseband signal, the feedback signal and memory signal to RF power amplification harmonic wave
The nonlinear channel of frequency is modeled, and the memory signal includes the memory base band letter that the baseband signal generation module generates
Number and the training signal module generate memory harmonic signal.
Second aspect, the present invention provides a kind of methods for eliminating radio circuit harmonic wave, and it is real to be applied to aforementioned first aspect
The radio circuit in example is applied, the method includes：
Generate baseband signal；
Generate anti-harmonic signal；
Upconversion process is carried out to the baseband signal and the anti-harmonic signal；
Anti- harmonic signal after baseband signal and up-conversion after up-conversion is subjected to Frequency mixing processing；
Signal after Frequency mixing processing is converted into analog signal by digital signal；
After transformed analog signal is carried out power, radiofrequency signal is exported；
Wherein, the anti-harmonic signal is calculated based on harmonic signal, the baseband signal and the feedback signal being currently generated
Anti- harmonic constant, and the signal generated based on the anti-harmonic constant, the feedback signal are that the radiofrequency signal passes through signal
Attenuation processing obtains deamplification, after the deamplification is converted to digital signal by analog signal, then downconverted processing
It obtains, the harmonic signal is the signal for being modulated to harmonic frequency.
Optionally, the anti-harmonic signal of generation, including：
Generate the harmonic signal for being modulated to harmonic frequency；
Based on the harmonic signal, the baseband signal and the feedback signal to the non-thread of RF power amplification harmonic frequency
Property channel modeled, obtain channel model and the corresponding channel parameter of the channel model；
Based on the baseband signal, the harmonic signal, the feedback signal and the channel parameter, calculates and obtain instead
Harmonic constant；
Based on the anti-harmonic constant, anti-harmonic signal is generated.
Optionally, after the generation is modulated to the harmonic signal of harmonic frequency, the method further includes：
The harmonic signal, the baseband signal and the feedback signal are subjected to registration process.
Optionally, after the generation is modulated to the harmonic signal of harmonic frequency, the method further includes：
In the initial state, the harmonic signal is exported as anti-harmonic signal.
Optionally, described humorous to RF power amplification based on the harmonic signal, the baseband signal and the feedback signal
The nonlinear channel of wave frequency rate is modeled, including：
Based on the harmonic signal, the baseband signal, the feedback signal and memory signal to RF power amplification harmonic wave
The nonlinear channel of frequency is modeled, and the memory signal includes the memory base band letter that the baseband signal generation module generates
Number and the training signal module generate memory harmonic signal.
Said one in the embodiment of the present application or multiple technical solutions at least have following one or more technology effects
Fruit：
Due to the radio circuit in the embodiment of the present application, due to using similar DPD (Digital Predistortion, number
Word predistortion) circuit structure, be provided with transmitting branch and feedback branch.In order to improve the efficiency of RF power amplification, RF power amplification
It usually works in inelastic region, therefore occurs harmonic wave interference at harmonic frequency, and the harmonic signal of harmonic frequency is passing through
Also distorted signals can occur when power amplifier, so, the anti-harmonic signal module in circuit is based on baseband signal, harmonic signal and leads to
Anti- harmonic constant is constantly calculated in the feedback signal for crossing the harmonic wave remnants that feedback branch receives, and then generates reduction harmonic wave
The anti-harmonic signal of the power of interference signal.In turn, it can effectively reduce that RF power amplification is non-linear to be caused by the anti-harmonic signal
Harmonic wave power, so as to avoid the interference to other channels.Also, since the interference of harmonic signal being put into base band
Reason, substantially reduces digital processing difficulty, and the anti-harmonic signal of generation, by the same RF power amplification, is simplified with former base band signal
Circuit structure reduces circuit cost.
Description of the drawings
Fig. 1 is the structural schematic diagram for the radio circuit that the application first embodiment provides；
Fig. 2 is the structural schematic diagram for the anti-harmonic signal module that the application first embodiment provides；
Fig. 3 is at the signal alignment module that the application first embodiment provides and RF power amplification Harmonic Modeling intermodule signal
Manage process schematic；
Fig. 4 is that the anti-harmonic generation module by signal that the application first embodiment provides handles schematic diagram.
Specific implementation mode
In technical solution provided by the embodiments of the present application, by a kind of method for eliminating radio circuit harmonic wave of offer and penetrate
Frequency circuit avoids the interference to other channels for reducing the power of RF power amplification harmonic wave caused by non-linear.The radio frequency electrical
Road includes：Transmitting branch, including baseband signal generation module, the first frequency-variable module, frequency mixer, digital analog converter, radio-frequency power
Amplifier, anti-harmonic signal module and the second frequency-variable module, the baseband signal generation module connect with first frequency-variable module
It connects, first frequency-variable module is connect with the frequency mixer, first end and the baseband signal of the anti-harmonic signal module
Generation module connects, and the second end of the anti-harmonic signal module is connect with second frequency-variable module, the second frequency conversion mould
Block is connect with the frequency mixer, and the baseband signal that the baseband signal generation module generates is after the first frequency converter up-conversion
The frequency mixer is inputted, the baseband signal generates anti-harmonic signal, the anti-harmonic wave letter after the anti-harmonic signal module
Number input the frequency mixer after the second frequency-variable module up-conversion, the frequency mixer by after frequency conversion baseband signal and frequency conversion
Mixed frequency signal is exported after anti-harmonic signal mixing afterwards, the mixed frequency signal is put through the digital analog converter and the radio-frequency power
Radiofrequency signal is exported after big device；Feedback branch, including radio frequency attenuator, analog-digital converter, third frequency-variable module, the radio frequency decline
Subtract device to connect with the radio-frequency power amplifier, the analog-digital converter is connect with the radio frequency attenuator, the third frequency conversion
One end of module is connect with the analog-digital converter, and the other end of the third frequency-variable module connects with the anti-harmonic signal module
It connects, the radiofrequency signal of the radio-frequency power amplifier output is converted through radio frequency attenuator decaying with the analog-digital converter
Afterwards, then by the third frequency-variable module down coversion, output feedback signal to the anti-harmonic signal module are carried out；Wherein, institute
Anti- harmonic signal module is stated based on the harmonic signal being currently generated, the baseband signal received and the feedback signal meter
Calculate anti-harmonic constant, and the anti-harmonic signal generated based on the anti-harmonic constant.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to skill of the present invention
The detailed description of art scheme, rather than to the restriction of technical solution of the present invention, in the absence of conflict, the embodiment of the present invention
And the technical characteristic in embodiment can be combined with each other.
Embodiment
Referring to FIG. 1, the application first embodiment provides a kind of radio circuit, including：
Transmitting branch 10 and feedback branch 20, wherein transmitting branch 10 includes baseband signal generation module, the first frequency conversion mould
Block, frequency mixer, digital analog converter, radio-frequency power amplifier, anti-harmonic signal module and the second frequency-variable module, baseband signal generate
Module is connect with the first frequency-variable module, and the first frequency-variable module is connect with frequency mixer, the first end and base band of anti-harmonic signal module
Signal generation module connects, and the second end of anti-harmonic signal module connect with the second frequency-variable module, the second frequency-variable module be mixed
Device connects, the baseband signal that baseband signal generation module generates input mixer, baseband signal after the first frequency converter up-conversion
Generate anti-harmonic signal after anti-harmonic signal module, anti-harmonic signal input mixer after the second frequency-variable module up-conversion,
Frequency mixer exports mixed frequency signal after being mixed the baseband signal after frequency conversion with the anti-harmonic signal after frequency conversion, and mixed frequency signal is through digital-to-analogue
Radiofrequency signal is exported after converter and radio-frequency power amplifier；
Wherein, feedback branch 20 include radio frequency attenuator, analog-digital converter, third frequency-variable module, radio frequency attenuator with penetrate
Frequency power amplifier connects, and analog-digital converter is connect with radio frequency attenuator, and one end and the analog-digital converter of third frequency-variable module connect
It connects, the other end of third frequency-variable module is connect with anti-harmonic signal module, and the radiofrequency signal of radio-frequency power amplifier output is through penetrating
Frequency attenuator is decayed with after analog-digital converter conversion, then by third frequency-variable module carries out down coversion, and output feedback signal is to anti-
Harmonic signal module；
Wherein, anti-harmonic signal module is based on the harmonic signal being currently generated, the baseband signal received and feedback letter
Number calculate anti-harmonic constant, and the anti-harmonic signal generated based on anti-harmonic constant.
Specifically, in the present embodiment, the baseband signal and the life of anti-harmonic signal module that baseband signal generation module generates
At anti-harmonic signal by frequency mixer be mixed and digital analog converter carry out digital-to-analogue conversion it is latter be sent into radio-frequency power amplification
Radiofrequency signal is exported after device.Wherein, baseband signal is modulated to frequency f0 through the first frequency-variable module, and anti-harmonic signal becomes through second
Frequency module is modulated to the harmonic frequencies such as frequency 2f0,3f0, both complex signal, by being mixed and becoming real letter after digital-to-analogue conversion
Number, it is fed back using radio-frequency power amplifier and radio frequency attenuator.Feedback signal is by each harmonic signal down coversion and mould
Number conversion becomes the harmonic wave complex signal of baseband frequency-domain, and RF power amplification harmonic wave channel is carried out with the baseband signal and harmonic signal of transmitting
Modeling and anti-harmonic constant calculate, and belong to closed loop estimation.
Further, as shown in Fig. 2, anti-harmonic signal module includes：
Training signal module, for generating the harmonic signal for being modulated to harmonic frequency；
RF power amplification Harmonic Modeling module, for being based on harmonic signal, baseband signal and feedback signal to RF power amplification
The nonlinear channel of harmonic frequency is modeled, and obtains channel model, the corresponding channel parameter of channel model is passed to anti-
Harmonic constant computing module；
Anti- harmonic constant computing module, for being based on baseband signal, harmonic signal, feedback signal and channel parameter, meter
It calculates and obtains anti-harmonic constant, anti-harmonic constant is sent to anti-harmonic generation module；
Anti- harmonic generation module generates anti-harmonic signal for being based on anti-harmonic constant；
Signal alignment module is connect with training signal module and RF power amplification Harmonic Modeling module respectively, is used for harmonic wave
Signal, baseband signal and feedback signal alignment, are sent to RF power amplification Harmonic Modeling module by the signal after alignment and build
Mould.
Gating signal module is connect with training signal module and anti-harmonic generation module respectively, in original state, gating letter
Number module controls the harmonic signal that anti-harmonic signal module output training signal module generates, and is generated in anti-harmonic generation module anti-
When harmonic signal, gating signal module controls anti-harmonic signal module and exports anti-harmonic signal.
RF power amplification Harmonic Modeling module is additionally operable to be based on harmonic signal, baseband signal, feedback signal and memory signal
The nonlinear channel of RF power amplification harmonic frequency is modeled, memory signal includes the memory that baseband signal generation module generates
The memory harmonic signal that baseband signal and training signal module generate.
Specifically, in the present embodiment, training signal module is mainly used for transmitting and is modulated to harmonic frequency nf0 (n>1)
The corresponding complex signal of harmonic signal, the anti-harmonic signal that anti-harmonic generation module is used to generate counteracting harmonic interference signals are corresponding
Complex signal.Signal gating module is mainly used for that output harmonic wave signal is selected still to export anti-harmonic signal, signal gating module
It can be modulated onto in corresponding harmonic frequency after output signal.The baseband signal and harmonic wave that signal alignment module is used for emit
Signal and the alignment of the feedback signal of reception, because signal is from being emitted to, receive can delay for some time.Anti- harmonic constant meter
It calculates module and is used to generate the coefficient that anti-harmonic generation module needs, the anti-harmonic constant after calculating is transferred to anti-harmonic generation mould
Block.Power amplifier Harmonic Modeling module is then that the feedback signal of base band is mixed to according to baseband signal, harmonic signal and feedback branch
The nonlinear channel of RF power amplification harmonic frequency is modeled, which also controls signal gating module gating harmonic signal
Or channel parameter is passed to anti-harmonic constant computing module by anti-harmonic signal as output after the completion of modeling.It needs to eliminate
How many order harmonics how many anti-training signal modules need to set, which can be with base band predistortion module
It is independent to use.
In the present embodiment, concrete signal processing procedure is as follows：
First, baseband signal x0 (k) starts to emit, and RF power amplification Harmonic Modeling module is started to work, and controls gating signal
Module gates training signal as nth harmonic signal xn (k) (n>1), harmonic signal may be second harmonic signal x2 (k),
May be harmonic signal x3 (k).Baseband signal is modulated to frequency f0 and frequency respectively with harmonic signal by Digital Up Convert
Rate nf0 switchs to analog signal by DAC (Digital Analog Converter, digital analog converter) and launches.At a high speed
ADC (Analog Digital Converter, analog-digital converter) also opens real-time reception harmonic interference signals yn (k), this is dry
The signal decayed through radio frequency attenuator that signal is radio-frequency power amplifier output is disturbed, when ADC is converted to digital signal, and is passed through
Down-converted obtains feedback signal.
Further, signal alignment module and the signal of RF power amplification Harmonic Modeling intermodule signal processing are as shown in Figure 3.
Signal alignment module first stores baseband signal and harmonic signal, and harmonic signal and the feedback signal received are done phase
Operation is closed, according to the peak value of related operation by baseband signal x0 (k), harmonic signal xn (k) and the harmonic interference signals that receive
Yn (k) is aligned, and the signal after alignment is sent to RF power amplification Harmonic Modeling module.
In turn, in RF power amplification Harmonic Modeling module, baseband signal generates a series of combinations with harmonic signal in group item
, it is contemplated that the memory effect of broadband power amplifier, it is also necessary to baseband signal x0 (k-m) before group item increase and before humorous
Wave signal xn (k-m) (m=1,2,3 ...), these past signals are known as memory signal, and the quantity of memory signal is according to power amplifier
It is determined with signal bandwidth, shown in group item such as formula (1)：
Here n indicates that harmonic order, parameter j and l are determined by the nonlinear degree of RF power amplification, wherein | | it is to signal
Carry out the range value that modulus obtains signal.These group items are sent to RF power amplification Harmonic Modeling mould together with feedback signal yn (k)
Block seeks RF power amplification harmonic wave channel parameter, and RF power amplification Harmonic Modeling module can use adaptive algorithm, can also use
Least square method, and RF power amplification Harmonic Modeling module can also seek the precision of modeling.
After the precision for the Channel Modeling that RF power amplification Harmonic Modeling module determines reaches requirement, RF power amplification Harmonic Modeling
Module exports enable signal ena, which exports the anti-harmonic wave that anti-harmonic generation module generates instead by gating signal module believes
Number, while the channel parameter of simulation fitting is sent to anti-harmonic constant computing module, signal pair by RF power amplification Harmonic Modeling module
Neat module can also issue the signal after alignment anti-harmonic constant computing module.Baseband signal, harmonic signal are in anti-harmonic constant
A series of combined types (2) are generated in computing module, combined type (2) and formula (1) are slightly different, i.e. the group of x0 (k-m) and xn (k-m)
The box-like each rank nonlinear terms for becoming x0 (k-m) amplitude.Some adaptive algorithms (such as NF- is used according to these combined types
LMS, NF-RLS algorithm) or the methods of model progress Inverse Model that RF power amplification Harmonic Modeling module obtains is solved anti-humorous
Wave system number.
Finally, anti-harmonic parameters are loaded into anti-harmonic generation module after anti-harmonic constant computing module iteratively solves every time
On, anti-harmonic generation module by signal processing schematic diagram is as shown in Figure 4.Also there are one group items to generate mould for anti-harmonic generation module
Block, each parameter phase that each combined type that group item generates obtains (shown in combined type such as formula (3)) with anti-harmonic constant computing module
Multiply after being added with regard to obtaining the anti-harmonic signal to be exported.
Radio circuit in the present embodiment dexterously utilize frequency f0 baseband signal and frequency nf0 harmonic signal with
The harmonic wave residual interference signal that ADC feedback branches receive obtain RF power amplification harmonic frequency channel.In order to improve radio frequency
The efficiency of power amplifier, RF power amplification usually works in inelastic region, therefore occurs harmonic wave interference at harmonic frequency, and harmonic wave frequency
When passing through power amplifier distorted signals can also occur for the harmonic emissions signal of rate, so needing uniformly to be built these three signals
Mould.Here in order to improve the precision of modeling, a signal gating module and training signal module has also been devised, when modeling
Using training signal as harmonic emissions signal.
For the design of anti-harmonic constant computing module, the module need frequency f0 transmitting signal and frequency nf0 it is humorous
Wave transmitting signal is obtained with the harmonic wave residual interference signal (i.e. feedback signal) and RF power amplification Harmonic Modeling module received
Channel parameter.The module can constantly adjust the coefficient of anti-harmonic constant module to drop according to remaining harmonic interference signals
The power of low harmony wave interference signal.
Design and common predistorter circuit difference, anti-harmonic generation module for anti-harmonic generation module are directed to
Different harmonic wave forms has different link forms, to inhibit harmonic wave interference significantly.
To sum up, compared to the prior art, the clever structure of the radio circuit in the present embodiment, it is at low cost, it can effectively drop
Spectral pollution caused by low power amplifier is non-linear improves the efficiency of power amplifier.
Due to the reception harmonic interference signals (i.e. feedback signal) and baseband signal, harmonic wave according to high-speed ADC feedback path
A series of combined types that signal generates model RF power amplification, and harmonic interference signals are put into base band and are handled, number is substantially reduced
Word processing difficulty, the anti-harmonic signal of generation, by the same RF power amplification, reduce circuit cost, may be used also with primary signal of penetrating
To be combined with base band predistortion, it is only necessary to increase a baseband signal feedback path, also, according to the reception of feedback road branch
Harmonic interference signals (i.e. feedback signal) and baseband signal, harmonic signal and RF power amplification harmonic frequency channel parameter are to anti-harmonic wave
Coefficient is solved, in turn, the anti-harmonic signal generated based on anti-harmonic constant can accurately with RF power amplification is non-linear leads
The harmonic wave of cause is cancelled out each other, it is also contemplated that the memory effect of power amplifier effectively reduces the power of RF power amplification harmonic interference signals, keeps away
The non-linear spectral pollution brought of RF power amplification is exempted from.
In turn, designed radio circuit is smaller in contrast to general RF power amplification base band predistortion circuit change, reduces
Requirement to radio frequency analog circuit, the circuit can reside in programmable gate array chip FPGA and can also exist on number
The performance requirement of word signal processor DSP or central processor CPU, signal processor is only related with the transmitting bandwidth of signal,
Can according to signal bandwidth reduce signal processor requirement, it is highly practical, realize cost it is low, occupancy it is small, have
Wide applicability.
The application second embodiment provides a kind of method for eliminating radio circuit harmonic wave, is applied in aforementioned first embodiment
Radio circuit, the method includes：
Generate baseband signal；
Generate anti-harmonic signal；
Upconversion process is carried out to the baseband signal and the anti-harmonic signal；
Anti- harmonic signal after baseband signal and up-conversion after up-conversion is subjected to Frequency mixing processing；
Signal after Frequency mixing processing is converted into analog signal by digital signal；
After transformed analog signal is carried out power, radiofrequency signal is exported；
Wherein, the anti-harmonic signal is calculated based on harmonic signal, the baseband signal and the feedback signal being currently generated
Anti- harmonic constant, and the signal generated based on the anti-harmonic constant, the feedback signal are that the radiofrequency signal passes through signal
Attenuation processing obtains deamplification, after the deamplification is converted to digital signal by analog signal, then downconverted processing
It obtains, the harmonic signal is the signal for being modulated to harmonic frequency.
Further, in the present embodiment, the anti-harmonic signal of generation, including：
Generate the harmonic signal for being modulated to harmonic frequency；
Based on the harmonic signal, the baseband signal and the feedback signal to the non-thread of RF power amplification harmonic frequency
Property channel modeled, obtain channel model and the corresponding channel parameter of the channel model；
Based on the baseband signal, the harmonic signal, the feedback signal and the channel parameter, calculates and obtain instead
Harmonic constant；
Based on the anti-harmonic constant, anti-harmonic signal is generated.
Further, in the present embodiment, after the generation is modulated to the harmonic signal of harmonic frequency, the method is also
Including：
The harmonic signal, the baseband signal and the feedback signal are subjected to registration process.
Further, in the present embodiment, after the generation is modulated to the harmonic signal of harmonic frequency, the method is also
Including：
In the initial state, the harmonic signal is exported as anti-harmonic signal.
Further, in the present embodiment, described to be based on the harmonic signal, the baseband signal and the feedback signal
The nonlinear channel of RF power amplification harmonic frequency is modeled, including：
Based on the harmonic signal, the baseband signal, the feedback signal and memory signal to RF power amplification harmonic wave
The nonlinear channel of frequency is modeled, and the memory signal includes the memory base band letter that the baseband signal generation module generates
Number and the training signal module generate memory harmonic signal.
Specifically, the method for eliminating radio circuit harmonic wave has carried out complete clearly description in the first embodiment, can join
First embodiment is seen, here, the application does not repeat.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of radio circuit, which is characterized in that including：
Transmitting branch, including the amplification of baseband signal generation module, the first frequency-variable module, frequency mixer, digital analog converter, radio-frequency power
Device, anti-harmonic signal module and the second frequency-variable module, the baseband signal generation module are connect with first frequency-variable module, institute
It states the first frequency-variable module to connect with the frequency mixer, first end and the baseband signal of the anti-harmonic signal module generate mould
Block connects, and the second end of the anti-harmonic signal module is connect with second frequency-variable module, second frequency-variable module and institute
Frequency mixer connection is stated, the baseband signal that the baseband signal generation module generates inputs institute after the first frequency converter up-conversion
Frequency mixer is stated, the baseband signal generates anti-harmonic signal after the anti-harmonic signal module, and the anti-harmonic signal is through institute
State and input the frequency mixer after the second frequency-variable module up-conversion, the frequency mixer by after frequency conversion baseband signal and frequency conversion after it is anti-
Mixed frequency signal is exported after harmonic signal mixing, the mixed frequency signal is after the digital analog converter and the radio-frequency power amplifier
Export radiofrequency signal；
Feedback branch, including radio frequency attenuator, analog-digital converter, third frequency-variable module, the radio frequency attenuator and the radio frequency
Power amplifier connects, and the analog-digital converter is connect with the radio frequency attenuator, one end of the third frequency-variable module and institute
Analog-digital converter connection is stated, the other end of the third frequency-variable module is connect with the anti-harmonic signal module, the radio frequency work(
The radiofrequency signal of rate amplifier output, with after analog-digital converter conversion, then passes through described the through radio frequency attenuator decaying
Three frequency-variable modules carry out down coversion, output feedback signal to the anti-harmonic signal module；
Wherein, the anti-harmonic signal module is based on the harmonic signal being currently generated, the baseband signal received and institute
It states feedback signal and calculates anti-harmonic constant, and the anti-harmonic signal generated based on the anti-harmonic constant.
2. radio circuit as described in claim 1, which is characterized in that the anti-harmonic signal module includes：
Training signal module, for generating the harmonic signal for being modulated to harmonic frequency；
RF power amplification Harmonic Modeling module, for being based on the harmonic signal, the baseband signal and the feedback signal pair
The nonlinear channel of RF power amplification harmonic frequency is modeled, and channel model is obtained, and the corresponding channel of the channel model is joined
Number is passed to anti-harmonic constant computing module；
The anti-harmonic constant computing module, for based on the baseband signal, the harmonic signal, the feedback signal and
The channel parameter calculates and obtains anti-harmonic constant, the anti-harmonic constant is sent to anti-harmonic generation module；
The anti-harmonic generation module generates anti-harmonic signal for being based on the anti-harmonic constant.
3. radio circuit as claimed in claim 2, which is characterized in that the anti-harmonic signal module further includes：
Signal alignment module is connect with the training signal module and the RF power amplification Harmonic Modeling module respectively, and being used for will
The harmonic signal, the baseband signal and feedback signal alignment, the radio frequency work(is sent to by the signal after alignment
Harmonic Modeling module is put to be modeled.
4. radio circuit as claimed in claim 2, which is characterized in that the anti-harmonic signal module further includes：
Gating signal module is connect respectively with the training signal module and the anti-harmonic generation module, in original state, institute
It states gating signal module and controls the harmonic signal that the anti-harmonic signal module exports the training signal module generation, described
When anti-harmonic generation module generates anti-harmonic signal, described in the gating signal module control anti-harmonic signal module output
Anti- harmonic signal.
5. radio circuit as claimed in claim 2, which is characterized in that the RF power amplification Harmonic Modeling module is additionally operable to：
Based on the harmonic signal, the baseband signal, the feedback signal and memory signal to RF power amplification harmonic frequency
Nonlinear channel modeled, the memory signal include the memory baseband signal that the baseband signal generation module generates and
The memory harmonic signal that the training signal module generates.
6. a kind of method for eliminating radio circuit harmonic wave, which is characterized in that be applied to any claim in Claims 1 to 5
The radio circuit, the method includes：
Generate baseband signal；
Generate anti-harmonic signal；
Upconversion process is carried out to the baseband signal and the anti-harmonic signal；
Anti- harmonic signal after baseband signal and up-conversion after up-conversion is subjected to Frequency mixing processing；
Signal after Frequency mixing processing is converted into analog signal by digital signal；
After transformed analog signal is carried out power, radiofrequency signal is exported；
Wherein, the anti-harmonic signal is calculated anti-humorous based on harmonic signal, the baseband signal and the feedback signal being currently generated
Wave system number, and the signal generated based on the anti-harmonic constant, the feedback signal are that the radiofrequency signal decays by signal
Processing obtains deamplification, and after the deamplification is converted to digital signal by analog signal, then downconverted processing obtains
, the harmonic signal is the signal for being modulated to harmonic frequency.
7. radio frequency method as claimed in claim 6, which is characterized in that the anti-harmonic signal of generation, including：
Generate the harmonic signal for being modulated to harmonic frequency；
Based on the harmonic signal, the baseband signal and the feedback signal to the non-linear letter of RF power amplification harmonic frequency
Road is modeled, and channel model and the corresponding channel parameter of the channel model are obtained；
Based on the baseband signal, the harmonic signal, the feedback signal and the channel parameter, calculates and obtain anti-harmonic wave
Coefficient；
Based on the anti-harmonic constant, anti-harmonic signal is generated.
8. radio frequency method as claimed in claim 7, which is characterized in that be modulated to the harmonic signal of harmonic frequency in the generation
Later, the method further includes：
The harmonic signal, the baseband signal and the feedback signal are subjected to registration process.
9. radio frequency method as claimed in claim 7, which is characterized in that be modulated to the harmonic signal of harmonic frequency in the generation
Later, the method further includes：
In the initial state, the harmonic signal is exported as anti-harmonic signal.
10. radio frequency method as claimed in claim 7, which is characterized in that described based on the harmonic signal, the baseband signal
And the feedback signal models the nonlinear channel of RF power amplification harmonic frequency, including：
Based on the harmonic signal, the baseband signal, the feedback signal and memory signal to RF power amplification harmonic frequency
Nonlinear channel modeled, the memory signal include the memory baseband signal that the baseband signal generation module generates and
The memory harmonic signal that the training signal module generates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810058532.9A CN108365862B (en) | 2018-01-22 | 2018-01-22 | Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810058532.9A CN108365862B (en) | 2018-01-22 | 2018-01-22 | Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108365862A true CN108365862A (en) | 2018-08-03 |
| CN108365862B CN108365862B (en) | 2020-10-16 |
Family
ID=63006616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810058532.9A Active CN108365862B (en) | 2018-01-22 | 2018-01-22 | Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108365862B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492589A (en) * | 2018-09-12 | 2020-08-04 | 华为技术有限公司 | Method and device for canceling radiation stray signals |
| CN111682912A (en) * | 2020-05-29 | 2020-09-18 | 中国科学院微电子研究所 | Ultra-wideband power amplifier harmonic wave elimination device and method based on FPGA |
| CN114826298A (en) * | 2022-05-30 | 2022-07-29 | 电子科技大学 | Harmonic suppression device and method for short-wave transmitter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090085908A (en) * | 2008-02-05 | 2009-08-10 | 엘지전자 주식회사 | Harmonic rejection mixer for compensating mismatch and tuner using the same |
| CN103701479A (en) * | 2013-12-16 | 2014-04-02 | 联想(北京)有限公司 | Method of information processing and base station |
| CN104883195A (en) * | 2015-06-05 | 2015-09-02 | 苏州闻捷传感技术有限公司 | Harmonic feedback based terahertz radar signal transmitter and transmitting method |
| WO2016078038A1 (en) * | 2014-11-19 | 2016-05-26 | 华为技术有限公司 | Pre-distortion processing device and method |
| CN107395538A (en) * | 2017-08-01 | 2017-11-24 | 厦门大学 | A kind of digital pre-distortion system and method for frequency selectivity harmonics restraint |
| CN107592083A (en) * | 2017-09-07 | 2018-01-16 | 东南大学 | The digital pre-distortion system and its method of millimeter wave broadband power amplifier |
-
2018
- 2018-01-22 CN CN201810058532.9A patent/CN108365862B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090085908A (en) * | 2008-02-05 | 2009-08-10 | 엘지전자 주식회사 | Harmonic rejection mixer for compensating mismatch and tuner using the same |
| CN103701479A (en) * | 2013-12-16 | 2014-04-02 | 联想(北京)有限公司 | Method of information processing and base station |
| WO2016078038A1 (en) * | 2014-11-19 | 2016-05-26 | 华为技术有限公司 | Pre-distortion processing device and method |
| CN104883195A (en) * | 2015-06-05 | 2015-09-02 | 苏州闻捷传感技术有限公司 | Harmonic feedback based terahertz radar signal transmitter and transmitting method |
| CN107395538A (en) * | 2017-08-01 | 2017-11-24 | 厦门大学 | A kind of digital pre-distortion system and method for frequency selectivity harmonics restraint |
| CN107592083A (en) * | 2017-09-07 | 2018-01-16 | 东南大学 | The digital pre-distortion system and its method of millimeter wave broadband power amplifier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492589A (en) * | 2018-09-12 | 2020-08-04 | 华为技术有限公司 | Method and device for canceling radiation stray signals |
| CN111492589B (en) * | 2018-09-12 | 2021-08-13 | 华为技术有限公司 | Method and device for canceling radiation stray signals |
| CN111682912A (en) * | 2020-05-29 | 2020-09-18 | 中国科学院微电子研究所 | Ultra-wideband power amplifier harmonic wave elimination device and method based on FPGA |
| CN111682912B (en) * | 2020-05-29 | 2022-03-08 | 中国科学院微电子研究所 | Ultra-wideband power amplifier harmonic wave elimination device and method based on FPGA |
| CN114826298A (en) * | 2022-05-30 | 2022-07-29 | 电子科技大学 | Harmonic suppression device and method for short-wave transmitter |
| CN114826298B (en) * | 2022-05-30 | 2023-03-24 | 电子科技大学 | Harmonic suppression device and method for short-wave transmitter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108365862B (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105812015B (en) | Highly integrated RF transceiver | |
| CN109495127B (en) | Device and method for self-adaptively counteracting passive intermodulation signal and application equipment | |
| CN106164685B (en) | Determine the active antenna system and method for intermodulation distortion performance | |
| Tamminen et al. | Digitally-controlled RF self-interference canceller for full-duplex radios | |
| CN101304395B (en) | Zero intermediate frequency transmitter as well as method and apparatus for correcting sideband and local oscillation leakage thereof | |
| CN107437959A (en) | The method of process signal in quadrature transmitter, wireless communication unit and emitter | |
| CN102299878B (en) | Method and device for realizing multi-band digital predistortion (DPD) | |
| CN108365862A (en) | Method for eliminating harmonic waves of radio frequency circuit and radio frequency circuit | |
| CN107078702B (en) | A kind of device and method of pre-distortion | |
| CN104283580A (en) | Radio frequency module passive inter-modulation (PIM) interference offset method and device | |
| JP2006528769A (en) | High frequency circuit analyzer, method of measuring response of electronic device to high frequency input signal and calibration method thereof, and method of improving and manufacturing the design of a circuit including them. | |
| CN103685109B (en) | Wideband digital predistortion multi-carrier power amplification system and power amplifier gain equalization device thereof and method | |
| CN101815054B (en) | Digital communication system and method for improving flatness in signal band thereof | |
| CN108141237A (en) | High-performance PIM with feedback is eliminated | |
| US20180041170A1 (en) | Radio frequency system with switch to receive envelope | |
| CN104883140A (en) | Digital predistortion device based on broadband radio frequency power amplifier | |
| CN102413083A (en) | Signal processing method and device | |
| CN109981505B (en) | Power-expandable wave beam directional digital predistortion device and method and transceiving system | |
| CN102204200A (en) | Digital analog predistortion processing apparatus, signal transmission system and signal transmission method | |
| CN111064496A (en) | Passive intermodulation test system | |
| US11563408B2 (en) | Active array antenna linearization | |
| CN102271106B (en) | Pre-distortion processing method and device | |
| Qin et al. | Design and analysis of digital-to-analog hybrid RF interference cancellation system based on multitap structure | |
| CN106788473B (en) | The restructural radio frequency transmit-receive method of broadband waveform based on software radio | |
| CN103580707A (en) | Signal transmitting device and signal transmitting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |