CN110380749A - Single-channel radio frequency anti-saturation device, method and system - Google Patents
Single-channel radio frequency anti-saturation device, method and system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/006—Devices for generating or processing an RF signal by optical means
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Abstract
The application relates to a single-channel radio frequency anti-saturation device, a method and a system thereof. The device comprises: the optical-electrical conversion module is used for receiving a radio-frequency input signal and converting the radio-frequency input signal into an optical signal, the optical branching module is used for dividing the optical signal into a plurality of paths of synchronous optical signals, the optical fiber delay module is used for respectively carrying out multi-path transmission on the plurality of paths of synchronous optical signals to generate a plurality of paths of delay optical signals with different delays relative to the synchronous optical signals, the optical-electrical conversion module is used for converting the plurality of paths of delay optical signals into a plurality of paths of delay electrical signals, and the algorithm processing module is used for carrying out iterative calculation on the plurality of paths of delay electrical signals through a self-adaptive filtering algorithm to obtain an optimal weight value to weight the delay electrical signals. By adopting the method, the radio frequency single channel can resist saturation.
Description
Technical field
This application involves radio frequency arts, more particularly to a kind of mono-channel radio-frequency anti-saturation device, method and its are
System.
Background technique
The anti-saturation technique of receiving end mainly passes through automatic gain control circuit (Automatic Gain at present
Control, AGC) realize anti-saturation.Using the size of AGC control gain, the state that low gain can be kept or decayed greatly,
The saturated phenomenon that subsequent conditioning circuit occurs by strong jamming is avoided, current this scheme is widely used.But the anti-saturation side of AGC
Although case can guarantee that saturated phenomenon does not occur in receiver, it has the inhibiting effect of same degree to interference and useful signal,
Actually useful signal is because the too small reason of gain can not be utilized at all.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide one kind be able to solve anti-saturation in the prior art interference lead
Useful signal is caused to be suppressed mono-channel radio-frequency anti-saturation device, method and its system of problem.
A kind of mono-channel radio-frequency anti-saturation device, described device include:
Electrooptic conversion module is converted into optical signal for receiving radio-frequency input signals, and by the radio-frequency input signals；
Optical branching module, for the optical signal to be divided into Multi-path synchronous optical signal；
Fiber delay time module, for the Multi-path synchronous optical signal to be carried out multiplexing respectively, generate multichannel relative to
The synchronous optical signal has the time delay optical signal of different delay；
Photoelectric conversion module, for converting multiple delay electric signal for the multiple delay optical signal；
Algorithm processing module, for the multiple delay electric signal to be iterated calculating by adaptive filter algorithm,
It obtains best initial weights to be weighted the time delay electric signal, and radio frequency exports.
In one of the embodiments, further include: electrooptic conversion module includes: laser and electrooptic modulator；Pass through institute
The light source that laser generates preset wavelength is stated, the electrooptic modulator receives radio-frequency input signals, according to the light source to described
Radio-frequency input signals carries out carrier modulation, generates the optical signal.
In one of the embodiments, further include: the fiber delay time module includes the optical fiber of a plurality of different length；It is described
Multi-path synchronous optical signal transmits in the optical fiber of the different length, and generating has different delay relative to the synchronous optical signal
Multiple delay optical signal.
In one of the embodiments, further include: the optical fiber of a plurality of different length is single mode optical fiber.
In one of the embodiments, further include: the algorithm processing module includes: width phase weighted units and algorithm list
Member；The width mutually weights the adjustment for carrying out amplitude and phase respectively to the multiple delay electric signal, obtains the input of multichannel algorithm
Signal；The multichannel algorithm input signal is inputted into the algorithm unit, the algorithm unit passes through adaptive filter algorithm pair
The multichannel algorithm input signal of input is iterated calculating, exports the best initial weights of the optimal width phase weighted units；Pass through
The parameter of the width phase weighted units is arranged in the best initial weights.
In one of the embodiments, further include: the algorithm process unit is calculated by the adaptive-filtering of lowest mean square
Method is iterated calculating.
In one of the embodiments, further include: the electrooptic conversion module, the optical branching module, the optical fiber prolong
When module and the photoelectric conversion module pass through fibre delay line realize.
In one of the embodiments, further include: bandpass filter；The bandpass filter is used to input the algorithm
Signal carries out bandpass filtering.
A kind of mono-channel radio-frequency anti-saturation method, which comprises
Multi-path synchronous optical signal is converted by radio-frequency input signals；
The Multi-path synchronous optical signal is subjected to multiplexing respectively, obtain multichannel has relative to the synchronous optical signal
The time delay optical signal of different delay；
Time delay electric signal is converted by the time delay optical signal, multiple delay electric signal input is pre-set certainly
Adaptive filtering algorithm is iterated calculating, obtains the corresponding best initial weights of the time delay electric signal；
The time delay electric signal is weighted according to the best initial weights, and carries out radio frequency output.
A kind of mono-channel radio-frequency anti-saturation system, comprising:
Input unit, for converting Multi-path synchronous optical signal for radio-frequency input signals；
Time delay generates unit, for the Multi-path synchronous optical signal to be carried out multiplexing respectively, obtain multichannel relative to
The synchronous optical signal has the time delay optical signal of different delay；
Iteration unit, it is for converting time delay electric signal for the time delay optical signal, the multiple delay electric signal is defeated
Enter pre-set adaptive filter algorithm and be iterated calculating, obtains the corresponding best initial weights of the time delay electric signal；
Radio frequency unit for being weighted according to the best initial weights to the time delay electric signal, and carries out radio frequency output.
Above-mentioned mono-channel radio-frequency anti-saturation device, method and its system, in transmitting terminal, by converting electrical signals to light letter
Number, and optical signal is divided into multipath light signal, it is transmitted in different channels, generating, there is the light of different delay to believe
Number, it is then converted to electric signal, in the phase that time delay is embodied in electric signal, by the difference in phase, using adaptive
Filtering algorithm, adaptometer are calculated best initial weights, are weighted using best initial weights to electric signal, are used when due to being iterated
Be input electric signal as reference signal, inhibit so as to the gain to high-power interference signal, subtract simultaneously
The distortion attenuation of few useful signal, thus realizing the signal interference ratio that can be improved system while anti-saturation.
Detailed description of the invention
Fig. 1 is the schematic diagram of mono-channel radio-frequency anti-saturation device in one embodiment；
Fig. 2 is the schematic diagram of mono-channel radio-frequency anti-saturation device in another embodiment；
Fig. 3 is structural schematic diagram when algorithm processing module is handled in one embodiment；
Fig. 4 is the flow diagram of mono-channel radio-frequency anti-saturation method in one embodiment；
Fig. 5 is the structural block diagram of mono-channel radio-frequency anti-saturation system in one embodiment；
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
In one embodiment, as shown in Figure 1, providing a kind of mono-channel radio-frequency anti-saturation device, including following part:
Electrooptic conversion module 110 is converted into light letter for receiving radio-frequency input signals, and by the radio-frequency input signals
Number.Since transmitting terminal receives wireless signal by antenna, and received as electronic signals in inside, therefore can adopt
Electric light conversion is carried out with electrooptic conversion module 110.
Optical branching module 120, for converting optical signal into Multi-path synchronous optical signal.Synchronous optical signal refers to each light
Intensity, frequency, wavelength of signal etc. are equal, and why electric signal is switched to optical signal by the present embodiment transmits, be due to
For optical signal in transmission, loss is small, and is easy to produce delay.It, can be with it is worth noting that be specifically divided into the synchronous optical signals in several roads
It being configured according to demand, the synchronization optical signal being divided into is more, and anti-interference ability is stronger, also result in that its is computationally intensive,
System response is slower.
Fiber delay time module 130 generates multichannel relative to same for Multi-path synchronous optical signal to be carried out multiplexing respectively
Walk the time delay optical signal that optical signal has different delay.Synchronous optical signal can choose different medium, such as twisted pair, coaxial electrical
Cable, optical fiber etc..By carrying out multiplexing, the time delay optical signal of different delay can produce.
Photoelectric conversion module 140, for converting multiple delay electric signal for multiple delay optical signal.Optical signal is converted
For electric signal, convenient for constructing the mathematic(al) representation of signal, and then it is convenient for mathematical computations.
Algorithm processing module 150 is obtained for multiple delay electric signal to be iterated calculating by adaptive filter algorithm
The time delay electric signal is weighted to best initial weights, and radio frequency exports.It is adaptive that adaptive filter algorithm can choose LMS
Answer filtering algorithm, NLMS adaptive filter algorithm etc..
In above-mentioned mono-channel radio-frequency anti-saturation device, in transmitting terminal, by converting electrical signals to optical signal, and by light
Signal is divided into multipath light signal, is transmitted in different channels, generates the optical signal with different delay, is then converted to
Electric signal, it is adaptive using adaptive filter algorithm by the difference in phase in the phase that time delay is embodied in electric signal
Best initial weights should be calculated, electric signal are weighted using best initial weights, using the electricity of input when due to being iterated
Signal inhibits as reference signal so as to the gain to high-power interference signal, while reducing useful signal
Distortion attenuation, thus realizing the signal interference ratio that can be improved system while anti-saturation.
Electrooptic conversion module includes: laser and electrooptic modulator in one of the embodiments, is generated by laser
The light source of preset wavelength, electrooptic modulator receive radio-frequency input signals, carry out carrier modulation to radio-frequency input signals according to light source,
Generate optical signal.The present embodiment provides a kind of specific implementation of photoelectric conversion module, passes through the same light source, it is ensured that carrier wave
When modulation, optical signal has unified wavelength.
Specifically, laser can choose DFB butterfly laser, there is 10Gbps rate, generation wavelength is 1550nm's
Light source, electrooptic modulator can choose the OCLARO electrooptic modulator of model F10.
The transmission medium for synchronizing optical signal in one of the embodiments, selects optical fiber, therefore, per synchronizable optical signal all the way
Transmitted by the optical fiber of different length, it, can be big since light transmits the form using refraction in a fiber
The distance of the promotion optical signal transmission of amplitude, to easier realize high delay.
Specifically, when only there is two-way to synchronize optical signal, wherein fiber lengths all the way are set as 0, i.e., it directly will be same
Step optical signal is sent to photoelectric conversion module, and the fiber lengths of another way are set as 4 meters, so that it may realize the delay of 13.3ns.
In another embodiment, above-mentioned optical fiber selects single mode optical fiber, therefore it is dry that mono-channel radio-frequency anti-saturation may be implemented
It disturbs.
In a specific embodiment, as shown in Fig. 2, a kind of specific mono-channel radio-frequency anti-saturation device is provided, in Fig. 2
In, electrooptic modulator 111 receives radio-frequency input signals, and laser 112 provides light source, and electrooptic modulator 111 is according to light source to penetrating
Frequency input signal carries out carrier modulation, to obtain optical signal, optical branching module 120 can choose optical splitter 121, diagram with
For 1 × 2 optical splitter, the optical splitter of other specifications also can choose, optical transmission medium selects optical fiber, therefore fiber delay time
Module 130 includes the optical fiber of two different lengths, respectively optical fiber 131 and optical fiber 132, and photoelectric conversion module 140 includes photoelectricity
Detector 141 and photodetector 142, and further include algorithm processing module 150.
Since fibre delay line has, time-bandwidth product is big, frequency is high, good linearity, insertion in one of the embodiments,
It is lost small and the advantages that without electromagnetic interference, also, fibre delay line can directly receive radio-frequency input signals, and export tool
There is an electric signal of time delay, therefore above-mentioned electrooptic conversion module, optical branching module, fiber delay time module and photoelectric conversion module can be with
It is realized by fibre delay line.
Algorithm processing module includes width phase weighting block and algorithm unit in one of the embodiments, wherein width is added
Power carries out the adjustment of amplitude and phase to multiple delay electric signal respectively, obtains multichannel algorithm input signal.The input of multichannel algorithm
Signal inputs algorithm unit, and algorithm unit is iterated meter by multichannel algorithm input signal of the adaptive filter algorithm to input
It calculates, exports the best initial weights of optimal width phase weighted units.The parameter of the width phase weighted units is set by best initial weights.This
In embodiment, it is weighted by time delay electric signal of the best initial weights to input, to realize the effect of anti-saturation.
Specifically, as shown in figure 3, providing a kind of schematic diagram of adaptive filter algorithm, wherein symbol W refers to
That a width in width phase weighted units mutually weights subelement, time delay electric signal input width mutually weights subelement, output one plus
Signal after power, algorithm unit calculate error amount by adaptive algorithm, are completed until iteration stopping to width phase by iteration
The right value update for weighting subelement, obtains best initial weights.
In addition, X1(n) it refers to radio-frequency input signals, for example above-mentioned reality of process of delay process is carried out to radio-frequency input signals
It applies shown in example, is repeated no more in figure, indicated using delay.In addition, there are n optical fiber in figure, i.e., it is same optical signal to be divided into the road n
Optical signal is walked, n width is equally provided with and mutually weights subelement, width is carried out to the synchronous optical signal in the road n respectively and mutually weights processing.
Algorithm unit is iterated calculating by the adaptive filter algorithm of lowest mean square in one of the embodiments,.
The adaptive filter algorithm of lowest mean square is also referred to as LMS (Least Mean Square, lowest mean square) algorithm, LMS algorithm
Treatment process is as follows:
Filtering output: y (n)=w (n) x (n)
Error signal: e (n)=d (n)-y (n)
Weight coefficient updates: w (n+1)=- 2 μ e (n) x (n) of w (n)
Wherein, y (n) refers to that radio frequency output signal, w (n) refer to that n-th of width mutually weights the weight of subelement, w (n+
1) it refers to the explanation that (n+1)th width mutually weights the weight of subelement, refers to, is added although only having n width in the present embodiment
Subelement is weighed, therefore w (n+1) can choose first width and mutually weight subelement according to the timing of delay.μ refers to global step
Long parameter, in order to realize the convergence of LMS algorithm, it is however generally that 0 < μ <, 1/ λ max, wherein λ max corresponding is that width mutually weights son
The correlation matrix of unit input delay electric signal carries out the maximum eigenvalue after Eigenvalues Decomposition.D (n) refers to reference signal,
By Fig. 3 it is known that the expression radio-frequency input signals of d (n).
By above-mentioned analysis, such as the condition of iteration is met at e (n), then weight coefficient is updated to w (n+1), then basis
W (n+1) mutually weights subelement to first width and carries out assignment, so that the signal that first width mutually weights subelement output is used as and penetrates
Frequency output signal.
It is worth noting that width mutually weight subelement weight be an imaginary number, representation ww=| a | ejb, to width
Mutually weighting subelement carries out assignment, is updated to the value of a and b.
It is worth noting that width phase weighted units can be real by programmable attenuator and programmable phase shifter on hardware
Existing, the code that LMS algorithm can be written in algorithm unit in micro-chip processor such as FPGA or DSP is realized.
In another embodiment, it for the mono-channel radio-frequency anti-saturation device of two optical-fibre channels, is only capable of fighting one kind
Interference signal, and so on for n optical-fibre channel mono-channel radio-frequency anti-saturation device, n-1 kind interference signal can be fought.
In addition, when carrying out anti-interference process, it is also necessary to the quantity and number of channels of interference signal are matched, such as
For the optical-fibre channel in two channels, then a kind of fiber-optic signal can only be handled, therefore, it is necessary to filter out other interference signals, only
A kind of interference signal is handled, specific practice is setting bandpass filter, the centre frequency of bandpass filter and the frequency of useful signal
Rate is a kind of, then carries out Bandwidth adjustment, makes to only exist a kind of interference signal in bandwidth spectrum.
In the present embodiment, multiple channels can be set more wide in range when the bandwidth of bandpass filter is arranged if it exists
Bandwidth.
Based on above-mentioned mono-channel radio-frequency anti-saturation device, a kind of mono-channel radio-frequency anti-saturation method, mono-channel radio-frequency are provided
Anti-saturation device can be realized by the simulation softward in computer, and mono-channel radio-frequency anti-saturation device is simulated in simulation softward
In each component, then pass through computer program control, realize mono-channel radio-frequency anti-saturation method.
In one embodiment, it as shown in figure 4, providing a kind of mono-channel radio-frequency anti-saturation method, runs in this way
For in computer equipment, comprising the following steps:
Step 402, Multi-path synchronous optical signal is converted by radio-frequency input signals.
Step 404, Multi-path synchronous optical signal is subjected to multiplexing respectively, obtain multichannel has relative to synchronous optical signal
The time delay optical signal of different delay.
Time delay optical signal is converted time delay electric signal by step 406, and the input of multiple delay electric signal is pre-set certainly
Adaptive filtering algorithm is iterated calculating, obtains the corresponding best initial weights of time delay electric signal.
Step 408, time delay electric signal is weighted according to best initial weights, and carries out radio frequency output.
It is worth noting that the mono-channel radio-frequency anti-saturation method is corresponding with mono-channel radio-frequency anti-saturation device, work as single-pass
Modules change in road radio frequency anti-saturation device, and mono-channel radio-frequency anti-saturation method changes correspondingly, therefore due to above-mentioned implementation
Modules change in mono-channel radio-frequency anti-saturation device in example, and caused mono-channel radio-frequency anti-saturation method is no longer superfluous herein
It states.
It should be understood that although each step in the flow chart of Fig. 4 is successively shown according to the instruction of arrow, this
A little steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly state otherwise herein, these steps
It executes there is no the limitation of stringent sequence, these steps can execute in other order.Moreover, at least part in Fig. 4
Step may include that perhaps these sub-steps of multiple stages or stage are executed in synchronization to multiple sub-steps
It completes, but can execute at different times, the execution sequence in these sub-steps or stage, which is also not necessarily, successively to be carried out,
But it can be executed in turn or alternately at least part of the sub-step or stage of other steps or other steps.
In one of the embodiments, as shown in figure 5, providing a kind of schematic structure of mono-channel radio-frequency anti-saturation system
Figure, comprising: input unit 502, time delay generate unit 504, iteration unit 506 and radio frequency unit 508.
Input unit 502, for converting Multi-path synchronous optical signal for radio-frequency input signals；
Time delay generates unit 504 and it is opposite to obtain multichannel for the Multi-path synchronous optical signal to be carried out multiplexing respectively
There is the time delay optical signal of different delay in the synchronous optical signal；
Iteration unit 506, for converting time delay electric signal for the time delay optical signal, by the multiple delay electric signal
It inputs pre-set adaptive filter algorithm and is iterated calculating, obtain the corresponding best initial weights of the time delay electric signal；
Radio frequency unit 508, for being weighted according to the best initial weights to the time delay electric signal, and it is defeated to carry out radio frequency
Out.
Specific restriction about mono-channel radio-frequency anti-saturation system may refer to above for mono-channel radio-frequency anti-saturation
The restriction of method, details are not described herein.Modules in above-mentioned mono-channel radio-frequency anti-saturation system can be fully or partially through
Software, hardware and combinations thereof are realized.Above-mentioned each module can be embedded in the form of hardware or independently of the place in computer equipment
It manages in device, can also be stored in a software form in the memory in computer equipment, in order to which processor calls execution or more
The corresponding operation of modules.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of mono-channel radio-frequency anti-saturation device, described device include:
Electrooptic conversion module is converted into optical signal for receiving radio-frequency input signals, and by the radio-frequency input signals；
Optical branching module, for the optical signal to be divided into Multi-path synchronous optical signal；
Fiber delay time module generates multichannel relative to described for the Multi-path synchronous optical signal to be carried out multiplexing respectively
Synchronous optical signal has the time delay optical signal of different delay；
Photoelectric conversion module, for converting multiple delay electric signal for the multiple delay optical signal；
Algorithm processing module is obtained for the multiple delay electric signal to be iterated calculating by adaptive filter algorithm
Best initial weights are weighted the time delay electric signal, and radio frequency exports.
2. the apparatus according to claim 1, which is characterized in that the electrooptic conversion module includes: laser and electric light tune
Device processed；
The light source of preset wavelength is generated by the laser, the electrooptic modulator receives radio-frequency input signals, according to described
Light source carries out carrier modulation to the radio-frequency input signals, generates the optical signal.
3. the apparatus according to claim 1, which is characterized in that the fiber delay time module includes the light of a plurality of different length
It is fine；
The Multi-path synchronous optical signal transmits in the optical fiber of the different length, and generation has relative to the synchronous optical signal
The multiple delay optical signal of different delay.
4. device according to claim 3, which is characterized in that the optical fiber of a plurality of different length is single mode optical fiber.
5. the apparatus according to claim 1, which is characterized in that the algorithm processing module include: width phase weighted units and
Algorithm unit；
The width mutually weights the adjustment for carrying out amplitude and phase respectively to the multiple delay electric signal, obtains the input of multichannel algorithm
Signal；
The multichannel algorithm input signal is inputted into the algorithm unit, the algorithm unit is by adaptive filter algorithm to defeated
The multichannel algorithm input signal entered is iterated calculating, exports the best initial weights of the optimal width phase weighted units；
The parameter of the width phase weighted units is set by the best initial weights.
6. device according to any one of claims 1 to 5, which is characterized in that the algorithm process unit passes through minimum equal
The adaptive filter algorithm of side is iterated calculating.
7. device according to any one of claims 1 to 5, which is characterized in that the electrooptic conversion module, the optical branching
Module, the fiber delay time module and the photoelectric conversion module are realized by fibre delay line.
8. device according to claim 5, which is characterized in that further include: bandpass filter；
The bandpass filter is used to carry out bandpass filtering to the algorithm input signal.
9. a kind of mono-channel radio-frequency anti-saturation method, which is characterized in that the described method includes:
Multi-path synchronous optical signal is converted by radio-frequency input signals；
The Multi-path synchronous optical signal is subjected to multiplexing respectively, obtaining multichannel relative to the synchronous optical signal has difference
The time delay optical signal of time delay；
Time delay electric signal is converted by the time delay optical signal, multiple delay electric signal input is pre-set adaptive
Filtering algorithm is iterated calculating, obtains the corresponding best initial weights of the time delay electric signal；
The time delay electric signal is weighted according to the best initial weights, and carries out radio frequency output.
10. a kind of mono-channel radio-frequency anti-saturation system characterized by comprising
Input unit, for converting Multi-path synchronous optical signal for radio-frequency input signals；
Time delay generates unit and obtains multichannel relative to described for the Multi-path synchronous optical signal to be carried out multiplexing respectively
Synchronous optical signal has the time delay optical signal of different delay；
Iteration unit inputs the multiple delay electric signal pre- for converting time delay electric signal for the time delay optical signal
The adaptive filter algorithm being first arranged is iterated calculating, obtains the corresponding best initial weights of the time delay electric signal；
Radio frequency unit for being weighted according to the best initial weights to the time delay electric signal, and carries out radio frequency output.
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| CN113452393A (en) * | 2021-06-29 | 2021-09-28 | 中国人民解放军国防科技大学 | Single-channel radio frequency anti-saturation device and method based on FBAR filtering delay structure |
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| CN113452393B (en) * | 2021-06-29 | 2022-06-21 | 中国人民解放军国防科技大学 | Single-channel radio frequency anti-saturation device and method based on FBAR filtering time delay structure |
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