CN116506012A - Microwave photon system for wide-spectrum electromagnetic signal measurement - Google Patents
Microwave photon system for wide-spectrum electromagnetic signal measurement Download PDFInfo
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- CN116506012A CN116506012A CN202310473592.8A CN202310473592A CN116506012A CN 116506012 A CN116506012 A CN 116506012A CN 202310473592 A CN202310473592 A CN 202310473592A CN 116506012 A CN116506012 A CN 116506012A
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- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 238000001228 spectrum Methods 0.000 title claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 210000001520 comb Anatomy 0.000 claims description 4
- 229940125730 polarisation modulator Drugs 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 244000126211 Hericium coralloides Species 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000003672 processing method Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims 2
- 238000001514 detection method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011426 transformation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
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Abstract
The invention discloses a microwave photon system for wide-spectrum electromagnetic signal measurement, and belongs to the field of electromagnetic signal measurement. The system comprises a first electro-optical comb, a first light-splitting device, a second electro-optical comb, a second light-splitting device, a first light-combining device, a second light-combining device, an electro-optical modulator, a power adjusting device, a balance detector and a data acquisition processing unit. The system has the advantages of simple structure, high measurement precision, low cost, huge frequency range of the measurable signals and the like.
Description
Technical Field
The invention relates to the field of electromagnetic signal measurement, in particular to an electromagnetic signal measurement method.
Background
The electromagnetic environment test is widely applied to various links of electromagnetic spectrum management such as radio station site selection, frequency assignment, radio control, electromagnetic environment evaluation and the like. With the increase of communication rate, signal frequency and bandwidth in electromagnetic environment are gradually developed toward high-frequency broadband.
When an electromagnetic signal to be detected in a wide spectrum range is an unknown signal, the traditional electronic measurement method is mainly divided into two main types, one type is a technology for carrying out high-speed sampling on the signal by meeting the Nyquist sampling law, the signal is mainly directly collected by using a high-speed ADC (analog-digital converter), and the time domain, the frequency domain or the time frequency of the collected signal is analyzed by an autocorrelation algorithm, an energy detection method and a wavelet transformation method, so that the detection of the signal is completed; the other type is that under the condition that the nyquist sampling law is not satisfied, signals obtained by low-speed sampling are recovered and analyzed through a digital channel detection technology, a self-adaptive multi-channel detection technology, a compression receiving technology, a scanning superheterodyne technology and the like, so that the detection of the signals is completed.
Detection of electromagnetic signals typically requires multiple filtering systems, which are complex and slow to measure, and cannot accommodate the measurement requirements of electromagnetic signals with a certain frequency conversion speed.
Disclosure of Invention
In view of the above, the invention provides a microwave photon system for measuring wide-spectrum electromagnetic signals. The invention has simple structure, high measurement precision, low cost and huge frequency range of the measurable signals.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a microwave photon system for wide-spectrum electromagnetic signal measurement comprises a first electro-optical comb, a first light splitting device, a second electro-optical comb, a second light splitting device, a first light combining device, a second light combining device, an electro-optical modulator, a power adjusting device, a balance detector and a data processing unit;
wherein the first electro-optical comb and the second electro-optical comb are electro-optical combs with different comb teeth;
the first light splitting device divides the signal of the first electro-optical comb into two paths, and the two paths enter the first light combining device and the second light combining device respectively;
the second light splitting device splits the signal of the second electro-optical comb into two paths, and the two paths enter the first light combining device and the second light combining device respectively;
the power of the signal of the first electro-optical comb entering the first light combining device is equal to that of the signal of the second electro-optical comb entering the first light combining device, and the power of the signal of the first electro-optical comb entering the second light combining device is also equal to that of the signal of the second electro-optical comb entering the second light combining device;
the signal output by the first light combining device enters an electro-optical modulator, is modulated by an electromagnetic signal to be detected and then enters an input port of a balance detector; after the signal output by the second light combining device passes through the power adjusting device, the power is equal to that of the signal of the electro-optic modulator, and the signal enters the other input port of the balance detector;
the output signal of the balance detector is collected and processed by the data processing unit to obtain the characteristics of the electromagnetic signal to be detected.
Further, the first light splitting device and the second light splitting device are optical fiber couplers, optical fiber beam splitters or polarization beam splitters.
Further, the electro-optic modulator is a light intensity modulator, an optical phase modulator, an optical polarization modulator, an acousto-optic modulator, or a magneto-optic modulator.
Further, the signal detected and output by the balance detector is an electromagnetic signal down-conversion signal to be detected, wherein the background signal is eliminated.
Further, the processing method of the data processing unit is as follows: and performing time-frequency conversion on the acquired signals to obtain down-converted signal frequency, amplitude and phase, dividing the center frequency value of the signals by the comb tooth difference of the first electro-optical comb and the second electro-optical comb to obtain the down-conversion multiplying power, and then performing inversion calculation to obtain the frequency, amplitude and phase or the variation of the electromagnetic signals to be detected.
The invention has the beneficial effects that:
1. the invention adopts a microwave photonics method, which can down-convert the electromagnetic signal with high frequency to the baseband for detection, on one hand, reduces the bandwidth requirement on the detector, and on the other hand, can realize the rapid measurement of the unknown signal.
2. The invention can measure the electromagnetic signal frequency domain information in the wide-spectrum signal.
3. The invention eliminates background noise through balanced detection, and can realize high-sensitivity frequency domain information measurement.
Drawings
Fig. 1 is a schematic block diagram of a microwave photon system for broad-spectrum electromagnetic signal measurement in an embodiment of the invention.
Description of the embodiments
As shown in fig. 1, a microwave photon system for measuring wide-spectrum electromagnetic signals comprises an electro-optical comb 1, a light splitting device 1, an electro-optical comb 2, a light splitting device 2, a light combining device 1, a light combining device 2, an electro-optical modulator, a power regulating device, a balance detector and a data processing unit.
Wherein the electro-optical comb 1 and the electro-optical comb 2 are electro-optical combs with different comb teeth; the optical splitter 1 divides the signal of the electro-optical comb 1 into two paths, and the two paths enter the optical combiner 1 and the optical combiner 2 respectively; the light splitting device 2 divides the signal of the electro-optical comb 2 into two paths, and the two paths enter the light combining device 1 and the light combining device 2 respectively; the power of the signal of the electro-optical comb 1 entering the light combining device 1 is equal to that of the signal of the electro-optical comb 2 entering the light combining device 1; the power of the signal of the electro-optical comb 1 entering the light combining device 2 is equal to that of the signal of the electro-optical comb 2 entering the light combining device 2; the signal output by the light combining device 1 enters an electro-optical modulator, is modulated by an electromagnetic signal to be detected and then enters an input port of a balance detector; after the optical signal output by the optical combining device 2 passes through the power adjusting device, the power is equal to that of the signal of the electro-optical modulator, and the optical signal enters the other input port of the balance detector; the output signal of the balance detector is collected and processed by the data processing unit to obtain the characteristics of the electromagnetic signal to be detected.
The spectroscopic device 1 and the spectroscopic device 2 may employ an optical fiber coupler, an optical fiber beam splitter, or a polarizing beam splitter.
The electro-optic modulator may employ a light intensity modulator, an optical phase modulator, an optical polarization modulator, an acousto-optic modulator, or a magneto-optic modulator.
The signal detected and output by the balance detector is the down-conversion signal of the electromagnetic signal to be detected, the background signal of which is eliminated.
The data processing unit calculates the frequency, amplitude, phase or variation of the electromagnetic signals to be measured according to the comb teeth of the electro-optical comb 1 and the electro-optical comb 2 and the output signals of the balance detector.
The following is a more specific example:
the microwave photon system for wide-spectrum electromagnetic signal measurement comprises an electro-optical comb 1, a light splitting device 1, an electro-optical comb 2, a light splitting device 2, a light combining device 1, a light combining device 2, an electro-optical modulator, a power regulating device, a balance detector and a data processing unit; the light splitting device 1, the light splitting device 2, the light combining device 1 and the light combining device 2 are all optical fiber couplers.
The electro-optical comb 1 and the electro-optical comb 2 have comb teeth of 1GHz and 1.00001GHz respectively, the signal to be detected is a frequency hopping signal, and the light splitting device 1 divides the signal of the electro-optical comb 1 into two paths which respectively enter the light combining device 1 and the light combining device 2; the light splitting device 2 divides the signal of the electro-optical comb 2 into two paths, and the two paths enter the light combining device 1 and the light combining device 2 respectively; the power of the signal of the electro-optical comb 1 entering the light combining device 1 is equal to that of the signal of the electro-optical comb 2 entering the light combining device 1; the signal power of the electrooptical comb 1 and the signal power of the electrooptical comb 2 entering the light combining device 2 are also equal; the signal output by the optical combiner 1 enters an electro-optical modulator, is modulated by a frequency hopping signal to be detected and then enters an input port of a balance detector; after the optical signal output by the optical combining device 2 passes through the power adjusting device, the power is equal to that of the signal of the electro-optical modulator, and the optical signal enters the other input port of the balance detector; the output signal of the balance detector is input into a data processing unit, is subjected to Fourier transform after analog-digital conversion, and is transformed from a time domain to a frequency domain to obtain a mixed down-conversion signal of the signal to be detected, the electro-optical comb 1 and the electro-optical comb 2. The resulting signal is a mixed down-converted signal with background interference removed due to the balanced detector. According to the frequency mixing down-conversion signal and the comb teeth interval difference of the two electro-optical combs, the multiplying power of down-conversion of the signal to be detected can be obtained, and then the original frequency hopping signal frequency domain information is obtained through inversion.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any person skilled in the art may make appropriate changes or modifications within the technical scope of the present disclosure, and such changes or modifications are intended to be included in the scope of the present disclosure.
Claims (5)
1. The microwave photon system for wide-spectrum electromagnetic signal measurement is characterized by comprising a first electro-optical comb, a first light splitting device, a second electro-optical comb, a second light splitting device, a first light combining device, a second light combining device, an electro-optical modulator, a power regulating device, a balance detector and a data processing unit;
wherein the first electro-optical comb and the second electro-optical comb are electro-optical combs with different comb teeth;
the first light splitting device divides the signal of the first electro-optical comb into two paths, and the two paths enter the first light combining device and the second light combining device respectively;
the second light splitting device splits the signal of the second electro-optical comb into two paths, and the two paths enter the first light combining device and the second light combining device respectively;
the power of the signal of the first electro-optical comb entering the first light combining device is equal to that of the signal of the second electro-optical comb entering the first light combining device, and the power of the signal of the first electro-optical comb entering the second light combining device is also equal to that of the signal of the second electro-optical comb entering the second light combining device;
the signal output by the first light combining device enters an electro-optical modulator, is modulated by an electromagnetic signal to be detected and then enters an input port of a balance detector; after the signal output by the second light combining device passes through the power adjusting device, the power is equal to that of the signal of the electro-optic modulator, and the signal enters the other input port of the balance detector;
the output signal of the balance detector is collected and processed by the data processing unit to obtain the characteristics of the electromagnetic signal to be detected.
2. A microwave photonic system for broad spectrum electromagnetic signal measurement according to claim 1 wherein the first and second light splitting devices are fiber couplers, fiber optic splitters or polarizing splitters.
3. A microwave photonic system for broad-spectrum electromagnetic signal measurement according to claim 1, wherein the electro-optical modulator is a light intensity modulator, an optical phase modulator, an optical polarization modulator, an acousto-optic modulator or a magneto-optic modulator.
4. A broad spectrum electromagnetic signal measurement oriented microwave photonic system as in claim 1, wherein the signal detected by the balanced detector is a signal to be measured electromagnetic signal down-converted from the background signal.
5. A microwave photonic system for broad-spectrum electromagnetic signal measurement according to claim 1, wherein the processing method of the data processing unit is as follows: and performing time-frequency conversion on the acquired signals to obtain down-converted signal frequency, amplitude and phase, dividing the center frequency value of the signals by the comb tooth difference of the first electro-optical comb and the second electro-optical comb to obtain the down-conversion multiplying power, and then performing inversion calculation to obtain the frequency, amplitude and phase or the variation of the electromagnetic signals to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310473592.8A CN116506012A (en) | 2023-04-28 | 2023-04-28 | Microwave photon system for wide-spectrum electromagnetic signal measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310473592.8A CN116506012A (en) | 2023-04-28 | 2023-04-28 | Microwave photon system for wide-spectrum electromagnetic signal measurement |
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| CN116506012A true CN116506012A (en) | 2023-07-28 |
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| CN202310473592.8A Pending CN116506012A (en) | 2023-04-28 | 2023-04-28 | Microwave photon system for wide-spectrum electromagnetic signal measurement |
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- 2023-04-28 CN CN202310473592.8A patent/CN116506012A/en active Pending
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