CN117806415A - Complex multiplication calculation method and system based on coherent light transceiving technology - Google Patents
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Abstract
A complex multiplication calculation method and system based on a coherent light receiving and transmitting technology relates to the technical field of photon calculation, wherein the complex multiplication calculation method based on the coherent light receiving and transmitting technology comprises the following steps: splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase; after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, generating four paths of optical mixing signals of 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively by using a mixer; photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion. The complex number calculation can be completed once in the optical domain without separate processing of a real part and an imaginary part, and the calculated throughput rate is the same as the baud rate of signal transmission.
Description
Technical Field
The application relates to the technical field of photon calculation, in particular to a complex multiplication calculation method and system based on a coherent light receiving and transmitting technology.
Background
Complex multiplication has wide application in various fields. In the field of electrical and electronic engineering, complex numbers are used to describe voltages, currents and impedances in ac circuits to aid in the analysis of phase relationships. In terms of control systems and signal processing, complex multiplication is used for frequency domain analysis to process the frequency response of a signal. In physics, complex multiplication is used to describe wave functions, wave propagation, and particle behavior in quantum mechanics. In the engineering field, complex multiplication is applied to vibration analysis, structural mechanics and complex system modeling.
The conventional complex multiplication operation based on the digital circuit needs to process the real part and the imaginary part of two complex numbers respectively, and the way of processing the real part and the imaginary part respectively leads to that the whole complex multiplication operation needs to execute 4 times of multiplication operations (the real part and the imaginary part of 2 complex numbers are multiplied respectively) and 2 times of addition operations (the real part and the imaginary part are added respectively). This means that in order to obtain the product of two complex numbers, the electrical chip needs to perform a series of independent multiplication and addition operations, with the real and imaginary parts being processed separately, thus obtaining the final complex product result.
While conventional such processing approaches are capable of performing complex multiplications, speed and efficiency may be limited in large-scale complex operations, particularly for application scenarios requiring a large number of complex multiplication operations, more efficient algorithms or hardware implementations may be required to increase the speed and efficiency of operations.
Disclosure of Invention
The application provides a complex multiplication calculation method and a system based on a coherent light receiving and transmitting technology, which can finish complex calculation in one time in an optical domain without separately processing a real part and an imaginary part, and the calculation throughput rate is the same as the baud rate of signal transmission.
In a first aspect, an embodiment of the present application provides a complex multiplication method based on a coherent light transceiving technology, where the complex multiplication method based on the coherent light transceiving technology includes:
splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase;
after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively;
after adjusting the two paths of modulated optical signals to equal optical paths, generating four paths of optical mixing signals of 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively by using a mixer;
photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion.
With reference to the first aspect, in one implementation manner, the splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and the same phase includes:
generating an original optical carrier wave with single frequency by using a laser, and transmitting the original optical carrier wave to a beam splitter for beam splitting;
the optical path length of the two paths of optical carriers is adjusted, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are the same.
With reference to the first aspect, in one implementation manner, a parameter of a first optical delay device connected between the optical splitter and the electro-optical modulation system is controlled by a computer, so that phases of two paths of optical carriers when reaching the electro-optical modulation system are identical.
With reference to the first aspect, in one embodiment, the parameters of the second optical delay device connected between the electro-optical modulation system and the mixer are controlled by a computer, so that the phases of the two modulated optical signals when reaching the mixer are identical.
With reference to the first aspect, in an implementation manner, the performing photoelectric conversion on the four-path optical mixing signal, determining a complex multiplication result based on the electric signal after photoelectric conversion includes:
photoelectric conversion is carried out on two groups of optical mixing signals of 0 degree, 180 degree, 90 degree and 270 degree respectively;
sampling the electric signals obtained by photoelectric conversion, and correcting the two sampled signals;
a complex multiplication result is generated from the sampling signal.
With reference to the first aspect, in one embodiment, a reference signal is sent in advance to calculate the intensity and phase variation to compensate for the intensity and phase information of the two signals obtained by sampling.
With reference to the first aspect, in one implementation, the complex signal is modulated onto the optical carrier using quadrature amplitude modulation.
In a second aspect, an embodiment of the present application provides a complex multiplication computing system based on a coherent light transceiving technology, where the complex multiplication computing system based on the coherent light transceiving technology includes:
a laser for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
an electro-optic modulation system for modulating real and imaginary information of two complex signals, respectively, on two optical carriers, wherein one of the two complex signals is conjugated;
a mixer for generating four paths of optical mixing signals of 0 °, 180 °,90 ° and 270 ° respectively from the two paths of modulated optical signals;
the balance detector is used for performing photoelectric conversion on the four paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a complex multiplication result based on the electric signals after photoelectric conversion.
With reference to the second aspect, in one embodiment, the control unit includes:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
With reference to the second aspect, in one embodiment, the control unit further includes:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
The beneficial effects that technical scheme that this application embodiment provided include at least:
according to the complex multiplication calculation method based on the coherent light receiving and transmitting technology, the obtained original light carrier is split and adjusted into two paths of light carriers with the same frequency and the same phase; after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, generating four paths of optical mixing signals of 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively by using a mixer; photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion.
Therefore, the multiplication of two complex numbers can be realized in one receiving and transmitting process, the calculation rate is the same as the data transmission rate, the throughput is large, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, by using a technique such as wavelength division multiplexing, a plurality of complex numbers can be multiplied in parallel. The complex multiplication is widely applied in the fields of scientific calculation, artificial intelligence and the like, and compared with a digital circuit, the real part and the imaginary part do not need to be processed separately, so that the hardware cost is greatly saved, and the requirement of future high-speed calculation is well met.
Drawings
FIG. 1 is a flow chart of an embodiment of a complex multiplication method based on coherent light transceiving technology according to the present application;
fig. 2 is a block diagram of an embodiment of a complex multiplication system based on coherent optical transceiver technology.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In the description of embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "plural" means two or more than two.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that these operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
It should be noted that photon calculation is a technology for processing and calculating information by using a photonics principle, and by modulating signals on light, data calculation can be performed on an optical domain by using characteristics of interference, dispersion and the like of the light, and the photon calculation has advantages of high bandwidth, low power consumption, low calculation delay and the like. Previous studies on optical computation have generally focused on acceleration of matrix or convolution computation involving only real-to-real arithmetic. Because the light itself has information such as intensity and phase, and the like, based on Euler formula, a beam of light can be used for representing complete complex information, so the present application can complete complex calculation on the light domain at one time by utilizing the current coherent light transceiver without separately processing a real part and an imaginary part, and the calculation throughput rate is the same as the baud rate of signal transmission.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present application provides a complex multiplication method based on a coherent optical transceiver technology.
In an embodiment, referring to fig. 1, fig. 1 is a flow chart illustrating an embodiment of a complex multiplication method based on a coherent optical transceiver technology according to the present application. As shown in fig. 1, the complex multiplication method based on the coherent light transceiving technology includes:
s1, splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase;
as shown in fig. 2, specifically, in this embodiment, step S1 includes:
s11, generating an original optical carrier wave with single frequency by utilizing a laser source, and sending the original optical carrier wave to a beam splitter for beam splitting;
s12, adjusting the optical path length of the two paths of optical carriers to enable the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system.
In particular, the parameters of the first optical delay device connected between the optical splitter and the electro-optical modulation system can be controlled by a computer, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are identical.
In this embodiment, the electro-optic modulation system includes an arbitrary waveform generator and an I/Q modulator.
S2, after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively.
It should be noted that two complex numbers to be multiplied can be set as Z 1 ＝a 1 +a 2 i and Z 2 ＝b 1 +b 2 i。
Thus, in the present embodiment, step S2 includes:
s21, inverting the imaginary part of one group of complex signals;
for example, can be equal to a 2 Take the reverse of-a 2 。
S22, generating two groups of analog electric signals, wherein each group of signals comprises one path of real part information and one path of imaginary part information;
s23, modulating real part information and imaginary part information on an optical carrier.
S3, after the two paths of modulated optical signals are adjusted to equal optical paths, four paths of optical mixing signals of 0 DEG, 180 DEG, 90 DEG and 270 DEG are respectively generated by using a mixer.
In particular, the parameters of the second optical delay device connected between the electro-optical modulation system and the mixer can be controlled by a computer, so that the phases of the two paths of modulated optical signals when reaching the mixer are identical. And then adopting a 90-degree optical mixer to respectively generate four paths of optical mixing signals of 0 degree, 180 degree, 90 degree and 270 degree.
S4, photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion.
Specifically, in the present embodiment, step S4 includes:
s41, respectively performing photoelectric conversion on two groups of optical mixing signals of 0 DEG, 180 DEG, 90 DEG and 270 DEG;
s42, sampling the electric signals obtained by photoelectric conversion, and correcting the two sampled signals;
s43, generating a complex multiplication result according to the sampling signal.
In this embodiment, two sets of balance detectors are used to photoelectrically convert two sets of mixed signals of 0 °, 180 °,90 °, and 270 °, and then the photoelectrically converted electrical signals are sampled by a signal acquisition device. Since the two signals may have intensity attenuation and phase shift during transmission, the sampled data may need to be processed and corrected, for example, by sending a reference signal in advance to calculate the intensity and phase variation, and compensating the intensity and phase information during actual calculation.
The mathematical principles of the present application are described below:
assume that the two complex numbers requiring multiplication are Z 1 ＝a 1 +a 2 i and Z 2 ＝b 1 +b 2 The I, I-channel optical carrier is Ccos (ω) c t), Q path optical carrier isWherein C is the amplitude of the light source, the I/Q modulator is used for modulating the complex signal onto the optical carrier, and the modulated signal is:
according to Euler's formula, the magnitudes of the two complex numbers are respectivelyAndthe phases are +.>And->
After the two signals are respectively transmitted to two input ends of the 90-degree optical mixer in an equal optical path way, four paths of optical mixing signals of 0 degree, 180 degree, 90 degree and 270 degree are generated, and the four paths of optical mixing signals are as follows:
respectively to E 1 、E 2 And E is 3 、E 4 Photoelectric conversion is carried out by using a balance detector, and two paths of electric signals after conversion are as follows:
wherein epsilon is the sensitivity of the balanced detector, and the low-pass characteristic of the receiving end can be converted into the following formula after eliminating the high-frequency component:
i according to Euler's formula 1 And i 2 Respectively a plurality Z 3 ＝Z 1 ×Z 2 The real part and the imaginary part of the product are multiplied by a constant, and the accurate value of the product can be directly calculated in the process of sampling and quantization. Based on the principle, the multiplication operation of two complex numbers is completed by one transmission, the real part and the imaginary part are not required to be processed separately, the calculation rate is the same as the data transmission rate, the throughput is large, and the calculation delay is low.
In summary, in the complex multiplication calculation method based on the coherent optical transceiver technology in the present application, the obtained original optical carrier is split and adjusted into two paths of optical carriers with the same frequency and the same phase; after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, generating four paths of optical mixing signals of 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively by using a mixer; photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion.
Therefore, the multiplication of two complex numbers can be realized in one receiving and transmitting process, the calculation rate is the same as the data transmission rate, the throughput is large, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, by using a technique such as wavelength division multiplexing, a plurality of complex numbers can be multiplied in parallel. The complex multiplication is widely applied in the fields of scientific calculation, artificial intelligence and the like, and compared with a digital circuit, the real part and the imaginary part do not need to be processed separately, so that the hardware cost is greatly saved, and the requirement of future high-speed calculation is well met.
In a second aspect, embodiments of the present application further provide a complex multiplication computing system based on a coherent optical transceiver technology.
In an embodiment, referring to fig. 2, fig. 2 is a schematic functional block diagram of an embodiment of a complex multiplication computing system based on coherent optical transceiver technology according to the present application. As shown in fig. 2, the complex multiplication computing system based on the coherent light transceiving technology includes:
a laser for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
an electro-optic modulation system for modulating real and imaginary information of two complex signals, respectively, on two optical carriers, wherein one of the two complex signals is conjugated;
a mixer for generating four paths of optical mixing signals of 0 °, 180 °,90 ° and 270 ° respectively from the two paths of modulated optical signals;
the balance detector is used for performing photoelectric conversion on the four paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a complex multiplication result based on the electric signals after photoelectric conversion.
Further, in an embodiment, the control unit includes:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
Further, in an embodiment, the control unit further includes:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
The principle of the complex multiplication computing system based on the coherent light transceiving technology of the present application is described below:
the laser source is used for generating an optical carrier to be modulated, the optical splitter is used for dividing the optical carrier from the laser source into two paths, the first optical delay device is used for adjusting two paths of optical paths led out by the optical splitter to ensure that the optical paths reach an electro-optical modulation system (comprising an arbitrary waveform generator and an I/Q modulator, the phases are identical when the arbitrary waveform generator is used for converting data to be calculated into electric analog signals, the I/Q modulator is used for modulating electric signals on the optical carrier, the second optical delay device is used for adjusting two paths of light output by the I/Q modulator to an equal optical path, the 90-degree optical mixer is used for generating four paths of optical mixing signals of 0 degree, 180 degree, 90 degree and 270 degree, the two sets of balance detectors are used for carrying out photoelectric conversion on the two sets of mixing signals of 0 degree, 180 degree and 90 degree, the signal acquisition equipment is used for sampling the electric signals after the photoelectric conversion, and the computer is used for adjusting parameters, displaying results, processing data and the like.
Specifically, the laser source generates an optical carrier wave with a single frequency and sends the optical carrier wave to the optical splitter, and the optical splitter divides the optical carrier wave into two beams of light to be modulated respectively. The complex sequence to be calculated is processed by a computer, sent to an arbitrary waveform generator to generate an electrical analog signal, and modulated onto an optical carrier by an I/Q modulator. According to the principles of an I/Q modulator, a complex signal can be modulated onto an optical carrier using quadrature amplitude modulation by modulating both real and imaginary parts onto two paths of light and phase shifting the optical carrier of the imaginary part by 90 °. And the parameters of the second optical delay device are regulated by a computer so that two beams of light have equal optical paths from the modulator to the optical mixer. The optical mixer is used for generating four paths of optical mixing signals of 0 DEG, 180 DEG, 90 DEG and 270 deg. The balance detector performs photoelectric conversion on two groups of signals of 0 DEG, 180 DEG and 90 DEG and 270 DEG respectively. And finally, sampling the electric signal by using a signal acquisition device. Since the two signals may generate intensity attenuation and phase shift during transmission, the sampled data needs to be processed and corrected finally, and a reference signal can be sent in advance to calculate the intensity and phase variation, and the intensity and phase information is compensated during actual calculation.
Thus, the multiplication operation of two complex numbers is completed by one transmission, and the real part and the imaginary part are not required to be processed separately.
In summary, the complex multiplication computing system based on the coherent light transceiving technology in the present application includes a laser, a beam splitter, an electro-optical modulation system, a mixer, a balance detector, and a control unit. The laser is used for outputting an original optical carrier wave with single frequency; the optical splitter is used for dividing the received original optical carrier into two paths of optical carriers with the same frequency; the electro-optic modulation system is used for modulating real part information and imaginary part information of two complex signals on two paths of optical carriers respectively, wherein one of the two complex signals is conjugated; the mixer is used for respectively generating four paths of optical mixing signals of 0 DEG, 180 DEG, 90 DEG and 270 DEG for the two paths of modulated optical signals; the balance detector is used for performing photoelectric conversion on the four paths of optical mixing signals; the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is further used for determining complex multiplication results based on the electric signals after photoelectric conversion.
Therefore, the multiplication of two complex numbers can be realized in one receiving and transmitting process, the calculation rate is the same as the data transmission rate, the throughput is large, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, by using a technique such as wavelength division multiplexing, a plurality of complex numbers can be multiplied in parallel. The complex multiplication is widely applied in the fields of scientific calculation, artificial intelligence and the like, and compared with a digital circuit, the real part and the imaginary part do not need to be processed separately, so that the hardware cost is greatly saved, and the requirement of future high-speed calculation is well met.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. The complex multiplication method based on the coherent light receiving and transmitting technology is characterized by comprising the following steps of:
splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase;
after one of two complex signals to be calculated is conjugated, real part information and imaginary part information are modulated on two paths of optical carriers respectively;
after adjusting the two paths of modulated optical signals to equal optical paths, generating four paths of optical mixing signals of 0 degrees, 180 degrees, 90 degrees and 270 degrees respectively by using a mixer;
photoelectric conversion is carried out on the four paths of optical mixing signals, and a complex multiplication result is determined based on the electric signals after photoelectric conversion.
2. The method for complex multiplication based on coherent optical transceiver technology as set forth in claim 1, wherein said splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase comprises:
generating an original optical carrier wave with single frequency by using a laser, and transmitting the original optical carrier wave to a beam splitter for beam splitting;
the optical path length of the two paths of optical carriers is adjusted, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are the same.
3. The complex multiplication method based on the coherent light transmitting and receiving technique according to claim 2, wherein:
the parameters of a first optical delay device connected between the optical splitter and the electro-optical modulation system are controlled by a computer, so that the phases of two paths of optical carriers when reaching the electro-optical modulation system are identical.
4. The complex multiplication method based on the coherent light transmitting and receiving technique according to claim 1, wherein:
the parameters of a second optical delay device connected between the electro-optical modulation system and the mixer are controlled by a computer, so that the phases of the two paths of modulated optical signals when reaching the mixer are the same.
5. The method for complex multiplication based on coherent optical transceiver technology according to claim 1, wherein said photoelectrically converting the four-way optical mixed signal and determining a complex multiplication result based on the photoelectrically converted electrical signal comprises:
photoelectric conversion is carried out on two groups of optical mixing signals of 0 degree, 180 degree, 90 degree and 270 degree respectively;
sampling the electric signals obtained by photoelectric conversion, and correcting the two sampled signals;
a complex multiplication result is generated from the sampling signal.
6. The complex multiplication method based on the coherent light transmission and reception technique according to claim 5, wherein:
a reference signal is sent in advance for calculating the intensity and phase variation to compensate the intensity and phase information of the two signals obtained by sampling.
7. The complex multiplication method based on the coherent light transmitting and receiving technique according to claim 1, wherein:
the complex signal is modulated onto an optical carrier using quadrature amplitude modulation.
8. A complex multiplication computing system based on a coherent light transceiving technology, the complex multiplication computing system based on a coherent light transceiving technology comprising:
a laser for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
an electro-optic modulation system for modulating real and imaginary information of two complex signals, respectively, on two optical carriers, wherein one of the two complex signals is conjugated;
a mixer for generating four paths of optical mixing signals of 0 °, 180 °,90 ° and 270 ° respectively from the two paths of modulated optical signals;
the balance detector is used for performing photoelectric conversion on the four paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a complex multiplication result based on the electric signals after photoelectric conversion.
9. The complex multiplication system based on the coherent light transreceiving technique according to claim 8, wherein said control unit includes:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
10. The complex multiplication computing system based on the coherent light transreceiving technique according to claim 9, wherein said control unit further comprises:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
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