CN110460397A - A kind of system for measuring observing and controlling waveform emission system frequency characteristic - Google Patents
A kind of system for measuring observing and controlling waveform emission system frequency characteristic Download PDFInfo
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- CN110460397A CN110460397A CN201910772855.9A CN201910772855A CN110460397A CN 110460397 A CN110460397 A CN 110460397A CN 201910772855 A CN201910772855 A CN 201910772855A CN 110460397 A CN110460397 A CN 110460397A
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- Prior art keywords
- observing
- emission system
- controlling waveform
- controlling
- frequency characteristic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
Abstract
The invention discloses a kind of systems for measuring observing and controlling waveform emission system frequency characteristic, belong to digital signal processing technique field.System for measuring observing and controlling waveform emission system frequency characteristic of the invention includes signal power measurement device and signal power measurements transmitting device, the signal power measurement device is connected with signal power measurements transmitting device, and signal power measurements transmitting device is connected with the master controller of observing and controlling waveform emission system.The system for measuring observing and controlling waveform emission system frequency characteristic of the invention effectively avoids the non-flatness of the frequency characteristic of observing and controlling waveform emission system, has good application value.
Description
Technical field
The present invention relates to digital signal processing technique fields, specifically provide a kind of for measuring observing and controlling waveform emission system frequency
The system of rate characteristic.
Background technique
Quantum calculation is a kind of novel calculating mode for following quantum mechanics rule regulation quantum information unit and being calculated.
It using the additivity principle of quantum state, is currently known on solving certain particular problems, quantum algorithm has more than classic algorithm
High computational efficiency.Known quantum algorithm processing problem speed certain at present will be faster than traditional general purpose computer.
Superconducting Quantum computing system is considered as most possible one of the scheme for realizing quantum computer.Superconducting Quantum calculates
In scheme, observing and controlling waveform emission system generates, transmits microwave waveform, exports to superconductive quantum bit, super for controlling and measuring
Lead the state of quantum bit.The precision of the microwave waveform of observing and controlling waveform emission system output directly affects observing and controlling fidelity and speed
Degree.
Observing and controlling waveform emission system includes master controller, memory, D/A converter and analog signal channel.Master controller is used
In generation, storage and the reading of control digital waveform data.Memory is used under the control of master controller, stores digital waveform
Data.D/A converter is used under the control of master controller, and the digital waveform data of input is converted to analog signal and is exported
To analog signal channel.Analog signal channel is used for the analog signal transmission that exports D/A converter to quantum bit.Analog signal
Access generally comprises (but being not limited to) forming filter, amplifier, attenuator, frequency mixer, connector and transmission cable etc..
The frequency characteristic of observing and controlling waveform emission system depends primarily on the frequency characteristic of D/A converter and analog signal channel
Product.The function of D/A converter determines that its frequency characteristic is SINC function.Analog signal channel be limited to manufacturing technology level,
The factors such as circuit layout, also there is certain rise and fall in frequency characteristic in bandwidth of operation.Therefore, if compensation is not added, observing and controlling waveform
Necessarily non-flat forms, practical observing and controlling waveform will with institutes after being transmitted by measurement and control signal emission system for the frequency characteristic of emission system
It needs observing and controlling waveform inconsistent, leads to Measure Precision and speed loss.
Summary of the invention
Technical assignment of the invention is in view of the above problems, to provide a kind of for measuring observing and controlling waveform emission system
The system of frequency characteristic.
The further technical assignment of the present invention is to provide a kind of for compensating the side of observing and controlling waveform emission system frequency characteristic
Method.
To achieve the above object, the present invention provides the following technical scheme that
A kind of system for measuring observing and controlling waveform emission system frequency characteristic, the system include signal power measurement device
With signal power measurements transmitting device, the signal power measurement device is connected with signal power measurements transmitting device
It connects, signal power measurements transmitting device is connected with the master controller of observing and controlling waveform emission system.
Preferably, multiple in signal power measurement device interval scan observing and controlling waveform emission system output broadband
Frequency point measures the frequency response of observing and controlling waveform emission system on the multiple Frequency point.
Wherein the signal power measurement device is in certain frequency interval scan observing and controlling waveform emission system output broadband
Multiple Frequency points, on these Frequency points measure observing and controlling waveform emission system frequency response.
Preferably, the signal power measurements transmitting device is by measurement feedback to observing and controlling waveform emission system
Master controller.
A method of for compensating observing and controlling waveform emission system frequency characteristic, this method handles heretofore described letter
The measurement result of number power-measuring device, obtains compensation rate, modifies digital waveform data according to compensation rate；Observing and controlling waveform transmitting system
The digital waveform for being stored in memory is converted into analog signal by D/A converter, and pass through under the control of master controller by system
Analog signal channel is transferred to quantum bit.
The operating mode of observing and controlling waveform emission system is divided into calibration mode and normal mode of operation.Calibration mode usually arranges
Before normal mode of operation.In such a mode, observing and controlling waveform emission system and frequency characteristic measurement device cooperate, observing and controlling
Waveform emission system issues specific waveforms (the single frequency sinusoidal continuous wave of such as specific frequency), and cooperation frequency characteristic measurement device is completed
Measurement.Also, observing and controlling waveform emission system can receive, the measurement result of processing frequency characteristic measuring device, and be compensated
Coefficient.Since the frequency characteristic of observing and controlling waveform emission system depends primarily on the technical conditions of its hardware, after obtaining penalty coefficient,
If the technical conditions of its hardware do not change, normal mode of operation can be transferred to.
Wherein, master controller has certain data-handling capacity, can processing frequency response characteristic measurement result.Pass through frequency
Response characteristic measurement is as a result, derive its compensated frequency characteristic, so that the product of its frequency response characteristic and its compensated frequency characteristic
It is flat.Inverse discrete fourier transform is carried out to compensated frequency characteristic, obtains the penalty coefficient in time domain.With this penalty coefficient
Implement convolution algorithm with digital waveform data, with the digital waveform data modified.
Preferably, generating original figure Wave data according to waveform algorithm in this method.
Preferably, modifying digital waveform data according to the frequency response characteristic of the observing and controlling waveform emission system.
Preferably, in memory by the storage of modified digital waveform, being used as the practical data read of main control
In generation analog signal.
Preferably, the detailed process of modification digital waveform are as follows:
1) in observing and controlling waveform emission system output bandwidth, the frequency response of interval measurement observing and controlling waveform emission system；
2) the frequency domain compensation weighting of observing and controlling waveform emission system is obtained；
3) frequency domain compensation is weighted and implements inverse discrete Fourier transform, generate time domain compensation weighting；
4) time domain compensation weighting is implemented into convolution with original figure Wave data, generates the digital waveform data of modification.
Compared with prior art, the method for compensating observing and controlling waveform emission system frequency characteristic of the invention has following
It is outstanding the utility model has the advantages that the method for compensating observing and controlling waveform emission system frequency characteristic can effectively avoid observing and controlling wave
The non-flatness of the frequency characteristic of shape emission system, thus after avoiding practical observing and controlling waveform from transmitting by measurement and control signal emission system
By the appearance with required observing and controlling waveform inconsistent the problem of leading to Measure Precision and speed loss, there is good popularization and application valence
Value.
Specific embodiment
Below in conjunction with embodiment, to the system for measuring observing and controlling waveform emission system frequency characteristic of the invention make into
One step is described in detail.
Embodiment
System for measuring observing and controlling waveform emission system frequency characteristic of the invention, including signal power measurement device and
Signal power measurements transmitting device.
Signal power measurement device is connected with signal power measurements transmitting device, signal power measurements transmission
Device is connected with the master controller of observing and controlling waveform emission system.
Wherein signal power measurement device is with more in certain frequency interval scan observing and controlling waveform emission system output broadband
A Frequency point measures the frequency response of observing and controlling waveform emission system on these Frequency points.
Signal power measurements transmitting device is by measurement feedback to the master controller of observing and controlling waveform emission system.
Method for compensating observing and controlling waveform emission system frequency characteristic of the invention, this method processing are heretofore described
Signal power measurement device measurement result, obtain compensation rate, according to compensation rate modify digital waveform data；Observing and controlling waveform hair
System is penetrated under the control of master controller, the digital waveform for being stored in memory is converted by analog signal by D/A converter,
And quantum bit is transferred to through analog signal channel.
The operating mode of observing and controlling waveform emission system is divided into calibration mode and normal mode of operation.Calibration mode usually arranges
Before normal mode of operation.In such a mode, observing and controlling waveform emission system and frequency characteristic measurement device cooperate, observing and controlling
Waveform emission system issues specific waveforms (the single frequency sinusoidal continuous wave of such as specific frequency), and cooperation frequency characteristic measurement device is completed
Measurement.Also, observing and controlling waveform emission system can receive, the measurement result of processing frequency characteristic measuring device, and be compensated
Coefficient.Since the frequency characteristic of observing and controlling waveform emission system depends primarily on the technical conditions of its hardware, after obtaining penalty coefficient,
If the technical conditions of its hardware do not change, normal mode of operation can be transferred to.
Wherein, master controller has certain data-handling capacity, can processing frequency response characteristic measurement result.Pass through frequency
Response characteristic measurement is as a result, derive its compensated frequency characteristic, so that the product of its frequency response characteristic and its compensated frequency characteristic
It is flat.Inverse discrete fourier transform is carried out to compensated frequency characteristic, obtains the penalty coefficient in time domain.With this penalty coefficient
Implement convolution algorithm with digital waveform data, with the digital waveform data modified.
Original figure Wave data is generated according to waveform algorithm in this method.According to the frequency of the observing and controlling waveform emission system
Rate response characteristic modifies digital waveform data.In memory by the storage of modified digital waveform, as the practical reading of main control
The data taken are for generating analog signal.
Wherein modify the detailed process of digital waveform are as follows:
1) in observing and controlling waveform emission system output bandwidth, the frequency response of interval measurement observing and controlling waveform emission system；
2) the frequency domain compensation weighting of observing and controlling waveform emission system is obtained；
3) frequency domain compensation is weighted and implements inverse discrete Fourier transform, generate time domain compensation weighting；
4) time domain compensation weighting is implemented into convolution with original figure Wave data, generates the digital waveform data of modification.
A specific embodiment of the invention includes power meter, which can measure observing and controlling waveform emission system work belt
In width on a certain frequency point signal power, and the power meter include power measurement storage, output function, and with measurement survey
Power measurement, can be fed back to observing and controlling waveform emission system by the interface for controlling waveform emission system.
In observing and controlling waveform emission system working band, N number of frequency point is taken at equal intervals, note frequency is respectively ωn, (n=
1,...,N).Successively on these frequency points, observing and controlling waveform emission system emits sinusoidal continuous wave signal with equal power.With function
Rate meter measures the power of output signal, obtains power sequence W={ W1,...,Wn,...,WN}.Find out wherein minimum value Wmin=
(W1,...,Wn,...,WN).If power is indicated with dBm, frequency domain compensation sequence be may be expressed as:
C={ C1,...,CN({ the W of }=- 21,...,WN}-Wmin)
Further obtain the frequency response sequence of compensating filter are as follows:
B={ B1,...,BN}=W+C
Convert the B indicated with dbm to is indicated with watt, and implements inverse discrete fourier transform (IDFT) to it, is obtained
Length is the compensation sequence A={ A of N in time domain1,...,AN}.The original figure Wave data D=for being M by A and length
{D1,...,DMImplement convolution, the digital waveform G={ G for the modification that length is (M+N-1) can be obtained1,...,GM+N-1}.This waveform
D/A converter can be read out to, for generating analog signal.
Embodiment described above, the only present invention more preferably specific embodiment, those skilled in the art is at this
The usual variations and alternatives carried out within the scope of inventive technique scheme should be all included within the scope of the present invention.
Claims (8)
1. a kind of system for measuring observing and controlling waveform emission system frequency characteristic, it is characterised in that: the system includes signal function
Rate measuring device and signal power measurements transmitting device, the signal power measurement device and signal power measurements pass
Defeated device is connected, and signal power measurements transmitting device is connected with the master controller of observing and controlling waveform emission system.
2. the system according to claim 1 for measuring observing and controlling waveform emission system frequency characteristic, it is characterised in that: institute
Multiple Frequency points in signal power measurement device interval scan observing and controlling waveform emission system output broadband are stated, in the multiple frequency
The frequency response of observing and controlling waveform emission system is measured on rate point.
3. the system according to claim 2 for measuring observing and controlling waveform emission system frequency characteristic, it is characterised in that: institute
State master controller of the signal power measurements transmitting device by measurement feedback to observing and controlling waveform emission system.
4. a kind of method for compensating observing and controlling waveform emission system frequency characteristic, it is characterised in that: this method processing right is wanted
The measurement result for seeking signal power measurement device described in 1-3 any one, obtains compensation rate, modifies digital wave according to compensation rate
Graphic data；Observing and controlling waveform emission system will be stored in the digital wave of memory by D/A converter under the control of master controller
Shape is converted into analog signal, and is transferred to quantum bit through analog signal channel.
5. the method according to claim 4 for compensating observing and controlling waveform emission system frequency characteristic, it is characterised in that: should
Original figure Wave data is generated according to waveform algorithm in method.
6. the method according to claim 5 for compensating observing and controlling waveform emission system frequency characteristic, it is characterised in that: root
Digital waveform data is modified according to the frequency response characteristic of the observing and controlling waveform emission system.
7. the method according to claim 6 for compensating observing and controlling waveform emission system frequency characteristic, it is characterised in that: will
Modified digital waveform storage in memory, is used to generate analog signal as the practical data read of main control.
8. the method according to claim 7 for compensating observing and controlling waveform emission system frequency characteristic, it is characterised in that: repair
Change the detailed process of digital waveform are as follows:
1) in observing and controlling waveform emission system output bandwidth, the frequency response of interval measurement observing and controlling waveform emission system；
2) the frequency domain compensation weighting of observing and controlling waveform emission system is obtained；
3) frequency domain compensation is weighted and implements inverse discrete Fourier transform, generate time domain compensation weighting；
4) time domain compensation weighting is implemented into convolution with original figure Wave data, generates the digital waveform data of modification.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030161487A1 (en) * | 2002-02-28 | 2003-08-28 | Husted Paul J. | Method and apparatus for transient frequency distortion compensation |
| CN102291140A (en) * | 2010-04-15 | 2011-12-21 | 特克特朗尼克公司 | Method for Compensating a Frequency Characteristic of an Arbitrary Waveform Generator |
| CN104678343A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Frequency response characteristic calibration method, device and system of waveform generator |
-
2019
- 2019-08-21 CN CN201910772855.9A patent/CN110460397A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030161487A1 (en) * | 2002-02-28 | 2003-08-28 | Husted Paul J. | Method and apparatus for transient frequency distortion compensation |
| CN102291140A (en) * | 2010-04-15 | 2011-12-21 | 特克特朗尼克公司 | Method for Compensating a Frequency Characteristic of an Arbitrary Waveform Generator |
| CN104678343A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Frequency response characteristic calibration method, device and system of waveform generator |
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