CN113612556A - Integrated multi-node spectrum sensing method and device - Google Patents
Integrated multi-node spectrum sensing method and device Download PDFInfo
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- CN113612556A CN113612556A CN202110856116.5A CN202110856116A CN113612556A CN 113612556 A CN113612556 A CN 113612556A CN 202110856116 A CN202110856116 A CN 202110856116A CN 113612556 A CN113612556 A CN 113612556A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
- H04B10/25759—Details of the reception of RF signal or the optical conversion before the optical fibre
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application relates to the technical field of signal processing, in particular to an integrated multi-node spectrum sensing method and device, wherein the method comprises the following steps: receiving broadband microwave signals to be detected in one or more areas; respectively carrying out electro-optic conversion on the broadband microwave signal to be detected at each node, and obtaining an optical carrier microwave signal after the signal is converted into an optical domain through an electrical domain; acquiring optical carrier microwave signals of each node, and carrying out routing selection on the acquired optical carrier microwave signals; and performing spectrum shaping on the obtained optical carrier microwave signal, and performing sampling quantization on the optical carrier microwave signal subjected to spectrum regulation and control by using the broadband photon ADC to obtain the spectrum information of the broadband microwave signal to be detected. According to the method, a multi-node analog signal light acquisition network is constructed, the scale of the nodes is expanded, the integration process of a multi-node spectrum sensing system is promoted, distributed acquisition and monitoring of electromagnetic space spectrum resources in a certain area are achieved, and rapid and accurate spectrum information is provided for self-adaptive allocation of wireless communication spectrum resources and electromagnetic countermeasure of radar space.
Description
Technical Field
The present application relates to the field of signal processing technologies, and in particular, to an integrated multi-node spectrum sensing method and apparatus.
Background
With the increasing demands of radio frequency systems such as wireless communication, new system radar and the like on capacity, transmission rate, detection resolution and the like in the future, the requirements of a receiving end on broadband signal receiving capability and spectrum cognitive capability are gradually increased so as to alleviate increasingly tense electromagnetic spectrum resources.
In the related art, the electrical receiving method has the problems of large transmission loss, narrow sampling bandwidth, large volume, high power consumption, serious electromagnetic interference and the like, so that the node acquisition number and the receivable bandwidth of a receiving end cannot be further expanded. The microwave photon technology is beneficial to breaking through the electrical bottleneck in the spectrum cognition and broadband signal receiving process by virtue of the unique advantages of the microwave photon technology in signal transmission and processing. At a signal receiving end, the photon signal processing technology is utilized to realize the rapid resolution and measurement of the electromagnetic spectrum so as to comprehensively know the real-time operation state of the electromagnetic spectrum, maximize the spectrum resource utilization efficiency, and the characteristic that the high sampling rate and the high effective bit of the broadband photon ADC are repeated is utilized to realize the effective receiving and recovery of any large-bandwidth signal waveform and obtain effective information.
However, at the present stage, due to differences between different material optoelectronic devices and between optoelectronic devices and radio frequency device architectures, processing scale and precision of a broadband microwave signal spectrum sensing system are limited, the integrated development of a receiving system platform is limited by function implementation principles of various links and discrete characteristics of device material systems, and multichannel broadband signal optical domain regulation and sampling in radio frequency systems such as wireless communication and radar are difficult to achieve, and improvement is urgently needed.
Content of application
The application provides an integrated multi-node spectrum sensing method and device, which are used for solving the technical problems of insufficient node scale, poor expansibility, discrete device functions, low integration degree and the like in a spectrum sensing system in the related technology.
An embodiment of a first aspect of the present application provides an integrated multi-node spectrum sensing method, including the following steps: receiving broadband microwave signals to be detected in one or more areas; performing electro-optic conversion on the broadband microwave signal to be detected at each node, and converting the broadband microwave signal to an optical domain through an electrical domain to obtain an optical carrier microwave signal; acquiring the optical carrier microwave signals of each node, and carrying out routing selection on the acquired optical carrier microwave signals; performing spectrum shaping on the obtained optical carrier microwave signal, and performing sampling quantization on the optical carrier microwave signal subjected to spectrum regulation and control by using a broadband photon ADC (analog to digital converter) to obtain frequency spectrum information of the broadband microwave signal to be detected
Optionally, in an embodiment of the present application, the receiving a broadband microwave signal to be measured includes: and receiving the broadband microwave signals in different areas by using a plurality of antennas to obtain the broadband microwave signals to be detected.
Optionally, in an embodiment of the present application, a bandwidth of the modulator is larger than a bandwidth of the echo signal.
Optionally, in an embodiment of the present application, the acquiring the optical carrier microwave signal of each node includes: collecting optical carrier microwave signals transmitted by each node through a transmission optical fiber; and carrying out integrated processing on the collected optical carrier microwave signals transmitted by each node.
An embodiment of a second aspect of the present application provides an integrated multi-node spectrum sensing apparatus, including: the receiving module is used for receiving broadband microwave signals to be detected in one or more areas; the conversion module is used for respectively carrying out electro-optical conversion on the broadband microwave signal to be detected at each node, and obtaining an optical carrier microwave signal after the signal is converted into an optical domain through an electrical domain; the routing module is used for acquiring the optical carrier microwave signals of each node and carrying out routing selection on the acquired optical carrier microwave signals; and the sensing module is used for performing spectrum shaping on the obtained optical carrier microwave signal, and sampling and quantizing the optical carrier microwave signal subjected to spectrum regulation and control by using the broadband photon ADC to obtain the frequency spectrum information of the broadband microwave signal to be detected.
Optionally, in an embodiment of the present application, the receiving module is further configured to receive the broadband microwave signal in different areas by using multiple antennas, so as to obtain the broadband microwave signal to be measured.
Optionally, in an embodiment of the present application, a bandwidth of the modulator is larger than a bandwidth of the echo signal.
Optionally, in an embodiment of the present application, the routing module is further configured to collect the optical carrier microwave signals transmitted by each node through a transmission optical fiber, and perform integrated processing on the collected optical carrier microwave signals transmitted by each node.
The method comprises the steps of converting a signal to be measured into an optical domain, performing node switching and optical spectrum regulation and control on the signal light at a central station after optical fiber transmission, and dynamically regulating and controlling the deterioration of dispersion, nonlinearity, crosstalk and other factors on the signal quality in the transmission process, so that an acquisition network has large-scale and high-performance characteristics, and spectrum cognition on the signal to be measured can be realized by utilizing the acquisition and reception of a broadband photon ADC (analog-to-digital converter), thereby acquiring the spectrum application condition of electromagnetic resources in a region. Therefore, the technical problems of insufficient node specification, poor expansibility, discrete device functions, low integration degree and the like in a spectrum sensing system in the related technology are solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of an integrated multi-node spectrum sensing method according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an implementation principle of an integrated multi-node spectrum sensing method according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating an implementation principle of an integrated multi-node spectrum sensing method according to an embodiment of the present application;
fig. 4 is an exemplary diagram of an integrated multi-node spectrum sensing device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The integrated multi-node spectrum sensing method and apparatus according to the embodiments of the present application are described below with reference to the accompanying drawings. Aiming at the technical problems of insufficient node scale, poor expansibility, discrete device functions, low integration degree and the like in a spectrum sensing system, which are mentioned in the background technology center, the application provides an integrated multi-node spectrum sensing method, in the method, a signal to be measured is converted into an optical domain, the signal light is switched at a central station and is subjected to optical spectrum regulation and control after being transmitted by an optical fiber, the deterioration of the signal quality caused by factors such as dispersion, nonlinearity, crosstalk and the like in the transmission process is dynamically regulated and controlled, so that an acquisition network has large-scale and high-performance characteristics, the spectrum cognition of the signal to be measured can be realized by utilizing the acquisition and the reception of a broadband photon ADC (analog-to-digital converter), the electromagnetic resource spectrum application condition in an area is obtained, a multi-node analog signal light acquisition network is established, the scale of a node is expanded, and the integration process of the multi-node spectrum sensing system is promoted, the distributed collection and monitoring of electromagnetic space spectrum resources in a certain area are realized, and quick and accurate spectrum information is provided for self-adaptive distribution of wireless communication spectrum resources and radar space electromagnetic countermeasure. Therefore, the technical problems of insufficient node specification, poor expansibility, discrete device functions, low integration degree and the like in a spectrum sensing system in the related technology are solved.
Specifically, fig. 1 is a flowchart illustrating an integrated multi-node spectrum sensing method according to an embodiment of the present disclosure.
As shown in fig. 1, the integrated multi-node spectrum sensing method includes the following steps:
in step S101, broadband microwave signals to be measured of one or more areas are received.
Optionally, in an embodiment of the present application, receiving a broadband microwave signal to be measured includes: and receiving the broadband microwave signals in different areas by using a plurality of antennas to obtain the broadband microwave signals to be detected.
As a possible implementation manner, as shown in fig. 2 and fig. 3, in the embodiment of the present application, a receiving antenna may collect microwave signals, for example, at a signal receiving end, a receiving antenna module is composed of N receiving antennas, and is configured to receive broadband microwave signals in a certain area and send the signals to a receiving end integrated node transmitter module, where the receiving antenna may adopt a conventional component, and is not limited specifically herein.
In step S102, each node performs electro-optical conversion on the broadband microwave signal to be measured, and converts the broadband microwave signal to an optical domain through an electrical domain to obtain an optical carrier microwave signal.
As a possible implementation manner, the integrated node transmitter module is used to perform electrical-to-optical conversion on the broadband microwave signal, and convert the microwave signal to be tested from an electrical domain to an optical domain, as shown in fig. 2 and fig. 3.
Wherein, in one embodiment of the present application, the bandwidth of the modulator is greater than the bandwidth of the echo signal.
It will be appreciated that in the case of electro-optical conversion, the bandwidth of the modulator is greater than the bandwidth of the echo signal for the purpose of electro-optical conversion.
In step S103, the optical carrier microwave signals of each node are obtained, and the obtained optical carrier microwave signals are routed.
In an embodiment of the present application, acquiring an optical carrier microwave signal of each node includes: collecting optical carrier microwave signals transmitted by each node through a transmission optical fiber; and carrying out integrated processing on the collected optical carrier microwave signals transmitted by each node.
As a possible implementation manner, as shown in fig. 2 and fig. 3, the processed signal is transmitted to the integrated optical switch module through an optical fiber, for example, the integrated optical switch module is an N × N switch matrix, and is used to perform routing on a transmission node of the optical signal, and the optical microwave signal redistributed by the path is sent to the integrated optical space modulation module.
The embodiment of the application completes electro-optical conversion in the nodes, further collects optical signals of all the nodes to perform routing so as to perform spectrum measurement, constructs a multi-node analog signal optical acquisition network, expands the scale of the nodes and simultaneously promotes the integration process of a multi-node spectrum sensing system, realizes distributed acquisition and monitoring of electromagnetic space spectrum resources in a certain area, and provides fast and accurate spectrum information for self-adaptive distribution of wireless communication spectrum resources and electromagnetic countermeasure of radar space.
In step S104, the obtained optical carrier microwave signal is subjected to spectrum shaping, and the optical carrier microwave signal subjected to spectrum regulation and control is subjected to sampling quantization by the broadband photon ADC, so as to obtain spectrum information of the broadband microwave signal to be measured.
Further, as shown in fig. 2 and fig. 3, as a possible implementation manner, the integrated optical space regulation and control module is configured to perform spectrum shaping on the optical carrier microwave signal after being switched by the optical fiber transmission and optical switch module, alleviate the influence of non-ideal factors such as crosstalk and dispersion in the transmission link on the signal, perform efficient fine processing on the optical spectrum to realize dynamic regulation and control, send the signal after being regulated and controlled by the optical spectrum to the optical input end of the broadband photonic ADC module, and finally perform sampling and quantization on the regulated and controlled optical signal by the broadband photonic ADC module, obtain spectrum information of the microwave signal to be measured at the signal processing end, know the electromagnetic resource allocation status in the area, and integrate resources in time to avoid unnecessary resource consumption.
That is to say, the embodiment of the application can collect microwave signals in different areas, and complete electro-optical conversion in the nodes, so that optical signals of each node are collected again for routing, and then spectrum regulation and control and photon ADC reception are performed, distributed collection and monitoring of electromagnetic space spectrum resources in a certain area are realized, and rapid and accurate spectrum information is provided for self-adaptive distribution of wireless communication spectrum resources and radar space electromagnetic countermeasure.
In summary, the embodiment of the application improves the scalability of a multi-node acquisition network by means of an integrated node transmitter and an integrated optical switch matrix, and can meet the acquisition requirement of electromagnetic space distributed information, the integrated optical regulation and control module utilizes an optical signal processing technology to suppress the influence of non-ideal factors such as optical fiber dispersion under a large-scale acquisition network on the performance of analog optical signals, and the broadband photonic ADC is suitable for waveform reception and spectrum measurement of any broadband signal. In addition, the whole spectrum sensing method is compact in principle and structure, miniaturization of each microwave photon functional module unit is achieved, and the integration degree of the system is further improved.
The working principle of the embodiment of the present application is described in detail below with reference to fig. 2 and 3 as a specific embodiment.
For example, the embodiment of the present application includes a receiving antenna unit, an integrated node transmitting unit, a transmission fiber, a central station switching node, an integrated optical space conditioning unit, and a broadband photonic ADC unit.
Specifically, the receiving antenna unit is used for receiving a broadband microwave signal to be detected, and the output end of the receiving antenna unit is connected with the microwave signal input end of the integrated node transmitting unit. The integrated node transmitting unit comprises an integrated module of a laser and an electro-optical modulator, conversion of broadband microwave signals from an electrical domain to an optical domain is completed in the node transmitting unit, and the bandwidth of the modulator in each branch is larger than that of echo signals. The integrated multi-node frequency spectrum sensing device comprises N integrated node transmitting units, wherein N is a positive integer and is the number of collecting nodes in the integrated multi-node frequency spectrum sensing device, and the output end of the integrated multi-node frequency spectrum sensing device is connected with the optical input end of a central station switching node after being transmitted by optical fibers. The central station switching node comprises N optical input ends for routing optical signals, and an output end is connected with the optical input end of the integrated optical space regulation and control unit. The integrated optical space regulation and control unit is used for performing spectrum shaping and regulation and control on the distributed optical carrier microwave signals, and the output end of the integrated optical space regulation and control unit is connected with the optical input end of the broadband photon ADC unit. The broadband photon ADC unit is used for carrying out frequency spectrum measurement on signals, realizing all-optical signal processing, reducing the speed requirement on a rear-end electric device, obtaining frequency spectrum information of the signals to be measured after sampling quantization and algorithm processing, and realizing self-adaptive distribution of electromagnetic resources.
For example, taking integrated two-node spectrum sensing as an example, the microwave signals to be measured are vector modulation signals with carrier frequencies of 1.25GHz and 11.25GHz respectively, the modulation signal format is 16QAM, the symbol rate is 10Msps, the integrated multi-node spectrum sensing system is realized after transmission through a 20km long-distance optical fiber (g.652), and finally a constellation diagram corresponding to the vector modulation signals is obtained, the constellation diagram can be used for measuring the occupation state of spectrum resources in a certain area range in real time, accurate spectrum sensing can be realized for the microwave signals collected by different nodes, and the multi-node spectrum sensing function is achieved.
According to the integrated multi-node frequency spectrum sensing method provided by the embodiment of the application, a signal to be measured is converted into an optical domain, node switching and optical spectrum regulation and control are carried out on signal light at a central station after the signal light is transmitted through an optical fiber, the deterioration of the signal quality caused by factors such as chromatic dispersion, nonlinearity and crosstalk in the transmission process is dynamically regulated and controlled, the acquisition network has the characteristics of large scale and high performance, and the spectrum cognition of the signal to be measured can be realized by utilizing the acquisition and the reception of the broadband photon ADC, thereby acquiring the application condition of electromagnetic resource frequency spectrum in a region, not only constructing a multi-node analog signal light acquisition network, expanding the scale of nodes, but also promoting the integration process of a multi-node frequency spectrum sensing system, realizing the distributed acquisition and monitoring of electromagnetic space frequency spectrum resources in a certain region, and fast and accurate spectrum information is provided for adaptive allocation of wireless communication spectrum resources and radar space electromagnetic countermeasure.
The integrated multi-node spectrum sensing apparatus proposed according to the embodiments of the present application is described next with reference to the accompanying drawings.
Fig. 4 is a block schematic diagram of an integrated multi-node spectrum sensing apparatus according to an embodiment of the present application.
As shown in fig. 4, the integrated multi-node spectrum sensing apparatus 10 includes: a receiving module 100, a converting module 200, a routing module 300 and a perceiving module 400.
Specifically, the receiving module 100 is configured to receive broadband microwave signals to be measured in one or more areas.
The conversion module 200 is used for performing electro-optical conversion on the broadband microwave signal to be detected at each node, and obtaining an optical carrier microwave signal after the signal is converted into an optical domain through an electrical domain;
the routing module 300 is configured to acquire the optical carrier microwave signals of each node, and perform routing on the acquired optical carrier microwave signals.
And the sensing module 400 is configured to perform spectrum shaping on the obtained optical carrier microwave signal, and perform sampling quantization on the optical carrier microwave signal subjected to spectrum regulation by the broadband photon ADC to obtain frequency spectrum information of the broadband microwave signal to be measured.
Optionally, in an embodiment of the present application, the receiving module 100 is further configured to receive the broadband microwave signals in different areas by using multiple antennas, so as to obtain the broadband microwave signals to be measured.
Optionally, in an embodiment of the present application, a bandwidth of the modulator is larger than a bandwidth of the echo signal.
Optionally, in an embodiment of the present application, the routing module 300 is further configured to collect the optical microwave signal transmitted by each node through a transmission optical fiber, and perform integrated processing on the collected optical microwave signal transmitted by each node.
It should be noted that the foregoing explanation of the embodiment of the integrated multi-node spectrum sensing method is also applicable to the integrated multi-node spectrum sensing apparatus of this embodiment, and is not repeated here.
According to the integrated multi-node frequency spectrum sensing device provided by the embodiment of the application, a signal to be measured is converted into an optical domain, node switching and optical spectrum regulation and control are carried out on signal light at a central station after the signal light is transmitted through an optical fiber, the deterioration of the signal quality caused by factors such as chromatic dispersion, nonlinearity and crosstalk in the transmission process is dynamically regulated and controlled, the acquisition network has the characteristics of large scale and high performance, and the spectrum cognition of the signal to be measured can be realized by utilizing the acquisition and the reception of the broadband photon ADC, thereby acquiring the application condition of electromagnetic resource frequency spectrum in a region, not only constructing a multi-node analog signal light acquisition network, expanding the scale of nodes, but also promoting the integration process of a multi-node frequency spectrum sensing system, realizing the distributed acquisition and monitoring of electromagnetic space frequency spectrum resources in a certain region, and fast and accurate spectrum information is provided for adaptive allocation of wireless communication spectrum resources and radar space electromagnetic countermeasure.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
Claims (8)
1. An integrated multi-node spectrum sensing method, comprising the steps of:
receiving broadband microwave signals to be detected in one or more areas;
performing electro-optic conversion on the broadband microwave signal to be detected at each node, and converting the broadband microwave signal to an optical domain through an electrical domain to obtain an optical carrier microwave signal;
acquiring the optical carrier microwave signals of each node, and carrying out routing selection on the acquired optical carrier microwave signals;
and performing spectrum shaping on the obtained optical carrier microwave signal, and performing sampling quantization on the optical carrier microwave signal subjected to spectrum regulation and control by using a broadband photon ADC (analog to digital converter) to obtain the spectrum information of the broadband microwave signal to be detected.
2. The method of claim 1, wherein receiving the broadband microwave signal under test comprises:
and receiving the broadband microwave signals in different areas by using a plurality of antennas to obtain the broadband microwave signals to be detected.
3. The method of claim 1, wherein the bandwidth of the modulator is greater than the bandwidth of the echo signal.
4. The method of claim 1, wherein the obtaining the microwave-over-optical signal of each node comprises:
collecting optical carrier microwave signals transmitted by each node through a transmission optical fiber;
and carrying out integrated processing on the collected optical carrier microwave signals transmitted by each node.
5. An integrated multi-node spectrum sensing apparatus, comprising:
the receiving module is used for receiving broadband microwave signals to be detected in one or more areas;
the conversion module is used for respectively carrying out electro-optical conversion on the broadband microwave signal to be detected at each node, and obtaining an optical carrier microwave signal after the signal is converted into an optical domain through an electrical domain;
the routing module is used for acquiring the optical carrier microwave signals of each node and carrying out routing selection on the acquired optical carrier microwave signals;
and the sensing module is used for performing spectrum shaping on the obtained optical carrier microwave signal, and sampling and quantizing the optical carrier microwave signal subjected to spectrum regulation and control by using the broadband photon ADC to obtain the frequency spectrum information of the broadband microwave signal to be detected.
6. The apparatus according to claim 5, wherein the receiving module receives the broadband microwave signal in different areas by using a plurality of antennas to obtain the broadband microwave signal to be tested.
7. The apparatus of claim 5, wherein the bandwidth of the modulator is greater than the bandwidth of the echo signal.
8. The apparatus of claim 5, wherein the routing module is further configured to collect the microwave-over-optical signals transmitted by the nodes via transmission fibers, and perform integrated processing on the collected microwave-over-optical signals transmitted by the nodes.
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