CN114816337B - Method for determining optimal sampling position of analog signal and quantum random number generation device - Google Patents
Method for determining optimal sampling position of analog signal and quantum random number generation device Download PDFInfo
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- CN114816337B CN114816337B CN202210765253.2A CN202210765253A CN114816337B CN 114816337 B CN114816337 B CN 114816337B CN 202210765253 A CN202210765253 A CN 202210765253A CN 114816337 B CN114816337 B CN 114816337B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/58—Random or pseudo-random number generators
- G06F7/588—Random number generators, i.e. based on natural stochastic processes
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Abstract
Disclosure of the inventionThe method for determining the optimal sampling position of analog signal and quantum random number generator relates to the field of signal processing and communication, and is based on the preset initial sampling position T 0 And step t 0 Adjusting the sampling position of the received analog signal to obtain a first sampling position T 1 (ii) a At a first sampling position T 1 Then, obtaining the maximum intensity value of the analog signal to obtain a first intensity value; according to the first sampling position T 1 And step t 0 Adjusting the sampling position of the analog signal to obtain a second sampling position T 2 (ii) a At the second sampling position T 2 Then, obtaining the maximum intensity value of the analog signal to obtain a second intensity value; and determining the optimal sampling position of the analog signal according to the first to the Nth intensity values, and ensuring that the stability of the quantum random number generating device and the generation rate of the quantum random number are not reduced on the premise of not increasing the signal sampling frequency of the analog-to-digital converter.
Description
Technical Field
The invention relates to the field of signal processing and communication, in particular to a method for determining an optimal sampling position of an analog signal and a quantum random number generation device.
Background
In modern society, random numbers are widely used in many fields such as simulation and cryptography. Random numbers can be classified into two broad categories, pseudo random numbers and true random numbers, depending on the principle of generation. Since pseudo-random numbers are generally generated by algorithms, with the increasing threat of quantum computing, pseudo-random numbers become predictable and thus their security is not guaranteed. The quantum random number generator comprises a quantum random number generator based on vacuum fluctuation and a quantum random number generator based on phase noise, and the generated random numbers are completely unpredictable, so the quantum random number generator has true randomness and is a more and mature quantum random number generator which is researched at present.
The generation rate and stability of random numbers are the core indicators of whether quantum random number generators can be put into practical use. Compared with the traditional quantum random number generator based on the phase noise, the existing quantum random number generator based on the pulse phase noise simplifies the system structure to a certain extent, and has higher stability. Under the same technical conditions, however, the generation rate of the quantum random numbers of the existing quantum random number generator based on the pulse phase noise is 25% of that of the traditional quantum random number generator based on the phase noise, and the generation rate of the random numbers is reduced. Therefore, in order to increase the generation rate of the random number, the sampling frequency of the optical signal should be theoretically at least 2 times the frequency of the pulsed light source, and in practice, the sampling frequency of the optical signal is generally set to be 4 times the frequency of the pulsed light source, which requires a high signal sampling frequency for the analog-to-digital converter.
Disclosure of Invention
The embodiment of the invention provides a method for determining an optimal sampling position of an analog signal and a quantum random number generation device, which are used for solving the defects of high performance requirement on an analog-to-digital converter and low generation rate of quantum random numbers in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a method for determining an optimal sampling position of an analog signal, including the following steps:
s1, starting time-delay scanning according to a preset initial sampling position T 0 And cloth is fed t 0 Adjusting the sampling position of the received analog signal to obtain a first sampling position T 1 。
S2, at the first sampling position T 1 And then, obtaining the maximum intensity value of the analog signal to obtain a first intensity value.
S3, according to the first sampling position T 1 And cloth is fed t 0 Adjusting the sampling position of the analog signal to obtain a second sampling position T 2 。
S4, at the second sampling position T 2 And then, obtaining the maximum intensity value of the analog signal to obtain a second intensity value.
S5, by parity of reasoning, continuously adjusting the current sampling position of the analog signal until the sampling position is larger than a preset sampling position T max And obtaining the Nth intensity value.
And S6, determining the optimal sampling position of the analog signal according to the first to Nth intensity values.
Preferably, determining the optimal sampling position of the analog signal based on the first to nth intensity values comprises:
and selecting the intensity value with the maximum value from the first to the Nth intensity values, and taking the sampling position corresponding to the intensity value as the optimal sampling position of the analog signal.
In a second aspect, an embodiment of the present invention provides a quantum random number generating device, including:
light source for preparing a period of S 0 The pulsed light of (2).
And the interferometer is used for receiving the pulsed light, carrying out interference based on the pulsed light and generating an interfered optical signal.
And the photoelectric detector is used for receiving the interfered optical signal and converting the optical signal into an analog signal.
And the controller is used for receiving the analog signal sent by the photoelectric detector and determining the optimal sampling position of the analog signal by adopting the method for determining the optimal sampling position of the analog signal in the first aspect.
And the delayer is used for adjusting the current signal sampling position of the analog-to-digital converter to the optimal sampling position according to the delay signal sent by the controller and the sampling clock signal carrying the optimal sampling position.
And the analog-to-digital converter is used for sampling the received analog signal according to the optimal sampling position sent by the delayer and converting the analog signal obtained by sampling into a digital signal.
And the processor is used for generating quantum random numbers according to the digital signals.
Preferably, the controller is further configured to:
and judging whether the current signal sampling position of the analog-digital converter is larger than a preset sampling position or not in real time, and if so, stopping working.
Preferably, the delayer is a delay IC chip.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where the storage medium stores a computer program, and the computer program is configured to execute the method described in the first aspect.
In a fourth aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method according to the first aspect.
The method for determining the optimal sampling position of the analog signal and the quantum random number generation device provided by the embodiment of the invention have the following beneficial effects:
the signal sampling position of the analog-digital converter is adjusted to the optimal signal sampling position by adopting the delayer, so that the stability of the quantum random number generating device and the generation rate of the quantum random number can be ensured not to be reduced on the premise of not increasing the signal sampling frequency of the analog-digital converter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for determining an optimal sampling position of an analog signal according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a conventional quantum random number generator;
fig. 3 is a schematic diagram of a sampling position adjustment process according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a component of a quantum random number generating device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, an implementation subject of the method for determining an optimal sampling position of an analog signal provided by an embodiment of the present invention is a controller, and the method includes the following steps:
s101, starting time-delay scanning according to a preset initial sampling position T 0 And cloth is fed t 0 Adjusting the sampling position of the received analog signal to obtain a first sampling position T 1 。
In particular, a first sampling position T 1 Is T 0 + t 0 . The initial sampling position and the adjusted sampling position are shown in fig. 3.
S102, under the first sampling position, obtaining the maximum intensity value of the analog signal to obtain a first intensity value.
Wherein, under the first sampling position, a plurality of intensity values of the analog signal can be obtained, and then the intensity value with the largest value is selected from the plurality of intensity values as the first sampling position T 1 And lowering a first intensity value corresponding to the optical signal.
S103, according to the first sampling position T 1 And cloth is fed t 0 Adjusting the sampling position of the analog signal to obtain a second sampling position T 2 。
In particular, the second sampling position T 2 Is T 1 +2t 0 . And so on, the third sampling position is T 1 + 3t 0 8230the Nth sampling position is T 1 + Nt 0 。
S104, at the second sampling position T 2 Then, the maximum intensity value of the analog signal is obtained, and a second intensity value is obtained.
And S105, by analogy, continuously adjusting the sampling position of the analog signal until the sampling position is larger than the preset sampling position, and obtaining the Nth intensity value.
S106, determining the optimal sampling position of the analog signal according to the first to the Nth intensity values.
Optionally, the step specifically includes:
and selecting the intensity value with the maximum value from the first to the Nth intensity values, and taking the sampling position corresponding to the intensity value as the optimal sampling position.
Specifically, a function graph of the maximum intensity values corresponding to each sampling position may be drawn according to the maximum intensity values obtained at each sampling position of the analog signal, and the function graph is analyzed by software to determine the intensity value with the largest value among the first to nth intensity values and the sampling position corresponding to the intensity value, and the sampling position is used as the optimal sampling position of the analog signal.
Example 2
As shown in fig. 4, the quantum random number generating device provided in the embodiment of the present invention includes a light source, an interferometer, a photodetector, a controller, an analog-to-digital converter, a time delay unit, and a processor, where:
light source for preparing a period of S 0 The pulsed light of (2).
In particular, the light source is a pulsed laser.
And the interferometer is used for receiving the pulsed light, carrying out interference based on the pulsed light and generating an interfered optical signal.
Specifically, the interferometer may be a michelson interferometer or an MZ unequal arm interferometer.
And the photoelectric detector is used for receiving the interfered optical signal and converting the optical signal into an analog signal.
The photoelectric detector detects the intensity value of the received optical signal, and sends the detected intensity value of the pulsed light to the analog-to-digital converter in the form of an analog signal.
Specifically, the photodetector may be a PN type photodetector, or may also be a PIN type photodetector or an avalanche photodiode.
A controller for determining the optimum sampling position of the analog signal by using the method for determining the optimum sampling position of the analog signal described in embodiment 1.
Specifically, the controller is a single chip microcomputer or a PLC controller.
Optionally, the controller is further specifically configured to:
and judging whether the current signal sampling position of the analog-digital converter is larger than a preset sampling position or not in real time, and if so, stopping working.
And the delayer is used for adjusting the current signal sampling position of the analog-to-digital converter to the optimal sampling position according to the delay signal sent by the controller and the sampling clock signal carrying the optimal sampling position.
And the analog-to-digital converter is used for sampling the received analog signal according to the optimal sampling position and converting the analog signal obtained by sampling into a digital signal.
Specifically, the analog-to-digital converter is an analog data acquisition card or a high-speed ADC module unit.
And the processor is used for generating quantum random numbers according to the digital signals.
Specifically, the processor includes an extraction unit that performs random extraction on the received digital signal to obtain a quantum random number and outputs the quantum random number.
Optionally, the delay is a delay IC chip.
Specifically, the signal sampling position of the analog-to-digital converter can be adjusted through the time delay, and when the signal sampling position sends a change, the intensity value of the analog signal sampled by the analog-to-digital converter also changes along with the change until the intensity value of the sampled analog signal reaches the maximum. On the premise of not increasing the signal sampling frequency of the analog-to-digital converter, the structure of the quantum random number generation device can be simplified, the stability of the quantum random number generation device is ensured, and the generation rate of the quantum random number is improved.
In particular, the light source driving signal sent by the controller and the sampling clock signal are the same source common-frequency signals.
Example 3
Fig. 5 is a structure of an electronic device according to an exemplary embodiment of the present invention. As shown in fig. 5, the electronic device may be either or both of the first device and the second device, or a stand-alone device separate from them, which may communicate with the first device and the second device to receive the collected input signals therefrom. FIG. 5 illustrates a block diagram of an electronic device in accordance with a disclosed embodiment of the invention. As shown in fig. 5, the electronic device includes one or more processors 401 and memory 402.
The processor 401 may be a Central Processing Unit (CPU) or other form of processing unit having pervasive data processing capability and/or instruction execution capability and may control other components in the electronic device to perform desired functions.
The input device 403 may also include, for example, a keyboard, a mouse, and the like.
The output device 404 can output various information to the outside. The output devices 404 may include, for example, a display, speakers, a printer, and a communication network and its connected remote output devices, among others.
Of course, for simplicity, only some of the components of the electronic device relevant to the present disclosure are shown in fig. 5, omitting components such as buses, input/output interfaces, and the like. In addition, the electronic device may include any other suitable components, depending on the particular application.
Example 4
In addition to the above-described methods and apparatus, embodiments of the present disclosure may also be a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods of infiltration data annotation, encapsulation, and retrieval according to various embodiments of the present disclosure described in the "exemplary methods" section of this specification above.
The computer program product may write program code for performing the operations of the disclosed embodiments of the present invention in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present disclosure may also be a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, cause the processor to perform the steps in the methods of infiltration data annotation, encapsulation, and retrieval according to various embodiments of the present disclosure described in the "exemplary methods" section above of this specification.
The computer-readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing describes the general principles of the present disclosure in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present disclosure are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present disclosure. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the present disclosure is not intended to be limited to the specific details set forth herein.
In the present specification, the embodiments are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts in each embodiment are referred to each other. For the system embodiment, since it basically corresponds to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.
The block diagrams of devices, apparatuses, devices, systems involved in the disclosure of the present invention are only given as illustrative examples and do not intend to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
The disclosed methods and apparatus may be implemented in a number of ways. For example, the methods and apparatus disclosed herein may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method disclosed herein are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
It is also noted that in the devices, apparatus and methods disclosed herein, components or steps may be broken down and/or re-combined. Such decomposition and/or recombination should be considered equivalents of the present disclosure. The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit the disclosed embodiments to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, adaptations, additions, and sub-combinations thereof.
It will be appreciated that the relevant features of the method and apparatus described above are referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.
Claims (3)
1. A quantum random number generation apparatus, comprising:
light source for preparing a light having a period of S 0 The pulsed light of (4);
the interferometer is used for receiving the pulse light and carrying out interference based on the pulse light to generate an interfered optical signal;
the photoelectric detector is used for receiving the interfered optical signal and converting the optical signal into an analog signal;
the controller is used for receiving the analog signal sent by the photoelectric detector and determining the optimal sampling position of the analog signal by adopting an optimal sampling position determination method of the analog signal, wherein the optimal sampling position determination method of the analog signal comprises the following steps:
s1, starting time-delay scanning according to a preset initial sampling position T 0 And step t 0 Adjusting the sampling position of the received analog signal to obtain a first sampling position T 1 ；
S2, at the first sampling position T 1 Then, obtaining the maximum intensity value of the analog signal to obtain a first intensity value;
s3, according to the first sampling position T 1 And step t 0 Adjusting the sampling position of the analog signal to obtain a second sampling position T 2 ；
S4, at the second sampling position T 2 Then, obtaining the maximum intensity value of the analog signal to obtain a second intensity value;
s5, by parity of reasoning, continuously adjusting the sampling position of the analog signal until the sampling position is larger than a preset sampling position T max Obtaining an Nth intensity value;
s6, determining the optimal sampling position of the analog signal according to the first to Nth intensity values, wherein the step comprises the following steps:
selecting an intensity value with the largest numerical value from the first intensity value to the Nth intensity value, and taking a sampling position corresponding to the intensity value as an optimal sampling position of the analog signal;
the time delay device is used for adjusting the current signal sampling position of the analog-to-digital converter to the optimal sampling position according to the time delay signal sent by the controller and the sampling clock signal carrying the optimal sampling position;
the analog-to-digital converter is used for sampling the received analog signal according to the optimal sampling position and converting the analog signal obtained by sampling into a digital signal;
and the processor is used for generating quantum random numbers according to the digital signals.
2. The quantum random number generation apparatus of claim 1, wherein the controller is further configured to:
and judging whether the current signal sampling position of the analog-digital converter is larger than a preset sampling position or not in real time, and if so, stopping working.
3. The quantum random number generation apparatus of claim 1, wherein the delay is a delay IC chip.
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| CN112364998A (en) * | 2020-10-15 | 2021-02-12 | 国开启科量子技术(北京)有限公司 | Phase randomness test device and method |
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| US7472148B2 (en) * | 2004-07-23 | 2008-12-30 | Qualcomm Incorporated | Method and apparatus for random-number generator |
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| CN102959870A (en) * | 2010-06-25 | 2013-03-06 | 森泰克有限公司 | Sensor signal sampling |
| CN209265419U (en) * | 2018-12-28 | 2019-08-16 | 北京中创为量子通信技术有限公司 | A kind of high speed quantum random number generator based on photon spontaneous radiation |
| CN112364998A (en) * | 2020-10-15 | 2021-02-12 | 国开启科量子技术(北京)有限公司 | Phase randomness test device and method |
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