CN112904378A - Method, device and system for improving flatness in output band of Beidou anti-interference antenna - Google Patents
Method, device and system for improving flatness in output band of Beidou anti-interference antenna Download PDFInfo
- Publication number
- CN112904378A CN112904378A CN202110091828.2A CN202110091828A CN112904378A CN 112904378 A CN112904378 A CN 112904378A CN 202110091828 A CN202110091828 A CN 202110091828A CN 112904378 A CN112904378 A CN 112904378A
- Authority
- CN
- China
- Prior art keywords
- signal
- amplitude
- processing
- weighting
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000013507 mapping Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims 1
- ADTDNFFHPRZSOT-PVFUSPOPSA-N ram-330 Chemical group C([C@H]1N(CC2)C)C3=CC=C(OC)C(OC)=C3[C@]32[C@@]1(O)CC[C@@H](OC(=O)OCC)C3 ADTDNFFHPRZSOT-PVFUSPOPSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000556 factor analysis Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/015—Arrangements for jamming, spoofing or other methods of denial of service of such systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
The invention provides a method, a device and a system for improving the flatness of an output band of a Beidou anti-interference antenna, wherein the method comprises the following steps: step a, acquiring a space signal received by an antenna, and converting the space signal into a corresponding frequency domain signal; b, performing anti-interference processing on the frequency domain signal to obtain a corresponding processing signal; step c, detecting the amplitude difference of all frequency points in the processed signal and analyzing the weighting coefficient of each frequency point in the effective bandwidth range; d, carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighted signal; and e, converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion processing. By the method, the amplitude of each frequency point can be kept consistent, and the in-band flatness of anti-interference output is improved.
Description
Technical Field
The invention relates to the technical field of signal processing, in particular to a method, a device and a system for improving flatness in an output band of a Beidou anti-interference antenna.
Background
At present, with the globalization of the layout of the Beidou satellite navigation system, the application range of the Beidou satellite navigation system is wider and wider, and the anti-interference antenna index requirement matched with the Beidou satellite navigation system is improved for the enhancement of hostile interference of enemies. There are many anti-interference implementations, and no matter time domain filtering, frequency domain filtering, spatial domain filtering, or space-time adaptive filtering, space-frequency adaptive filtering, or combined filtering between them, it is necessary to convert the radio frequency signal received by the antenna to intermediate frequency, then to digital signal, after digital signal processing, to analog intermediate frequency by DAC, and to convert back to radio frequency signal after up-conversion. However, in a series of transforms, there are many filters present, whether in the analog or digital domain. For an analog filter, along with the continuous improvement of the miniaturization requirement of a device, the unloaded Q value of a microwave resonator is inevitably reduced, and the flatness in a band is deteriorated; in the case of a digital filter, the flatness in the band fluctuates in order to satisfy the out-of-band rejection ratio and other parameters when the filter order is determined, subject to the limitation of the circuit scale. Therefore, it is necessary to provide a scheme to improve the flatness of the output band of the Beidou anti-jamming antenna.
Disclosure of Invention
The invention aims to provide a method, a device and a system for improving the flatness in an output band of a Beidou anti-interference antenna, which are used for realizing the technical effect of improving the flatness in the output band of the Beidou anti-interference antenna.
In a first aspect, the invention provides a method for improving flatness in an output band of a Beidou anti-interference antenna, which comprises the following steps:
step a, acquiring a space signal received by an antenna, and converting the space signal into a corresponding frequency domain signal;
b, performing anti-interference processing on the frequency domain signal to obtain a corresponding processing signal;
step c, detecting the amplitude difference of all frequency points in the processed signal and analyzing the weighting coefficient of each frequency point in the effective bandwidth range;
d, carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighted signal;
and e, converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion filtering processing.
Further, the step c includes:
storing the processing signals in a first RAM by taking each frame as a unit, and analyzing a first corresponding relation between all frequency points in each frame signal and a first address in the first RAM;
analyzing the weighting coefficients of each frequency point and a reference frequency point in each frame of signal according to the effective bandwidth range;
storing the weighting coefficients in a second RAM, and calculating a second corresponding relation between each frequency point and a second address in the second RAM;
and mapping a third corresponding relation between the first address and the second address according to the first corresponding relation and the second corresponding relation.
Further, the step of analyzing the weighting coefficients of each frequency point and the reference frequency point in each frame of signal according to the effective bandwidth range includes:
according to the formula wAi＝ArefCalculating amplitude errors of all frequency points of each frame signal by using the/Ai (i ═ 1, 2.., N); in the formula, wAiDenotes the amplitude error, ArefRepresenting reference frequency points, and Ai representing each frequency point in each frame signal;
according to the sampling rate fsThe frequency point number N of each frame signal and the simulated intermediate frequency central frequency point f0Calculating the useful signal bandwidth range by the useful signal bandwidth B;
and obtaining the amplitude error of the in-band signal according to the bandwidth range of the useful signal to obtain a final weighting coefficient.
Further, the step d includes: sequentially acquiring the processing signals from the first RAM, and simultaneously sequentially acquiring corresponding weighting coefficients from the second RAM according to the third corresponding relation; and carrying out amplitude weighting processing on the processing signals according to the weighting coefficients to obtain weighted signals.
In a second aspect, the invention provides a device for improving the flatness in an output band of a Beidou anti-interference antenna, which comprises a signal receiving module, an anti-interference processing module, an amplitude balancing module and a signal output module; the signal receiving module is used for acquiring a space signal received by an antenna and converting the space signal into a corresponding frequency domain signal; the anti-interference processing module is used for carrying out anti-interference processing on the frequency domain signal to obtain a corresponding processing signal; the amplitude balancing module is used for detecting the amplitude difference of all frequency points in the processing signal and calculating the weighting coefficient of each frequency point in the effective bandwidth range; carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighting signal; the signal output module is used for converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion processing.
Further, the signal receiving module comprises an antenna; a radio frequency channel connected to the antenna; the analog-to-digital converter is connected with the radio frequency channel; and an FFT conversion circuit connected with the analog-to-digital converter.
Further, the signal output module comprises an IFFT transformation circuit connected to the output of the amplitude equalization module; an AGC circuit connected to the IFFT conversion circuit; the digital-to-analog converter is connected with the AGC circuit; and the up-conversion filter circuit is connected with the digital-to-analog converter.
Further, the amplitude equalization module comprises a processor; a first RAM connected to the processor; and a second RAM connected to the processor; the processor comprises a weighting coefficient analysis unit and a signal weighting processing unit; the first RAM is used for storing processing signals; the weighting coefficient analysis unit is used for detecting the amplitude difference of all frequency points in the processed signal, calculating the weighting coefficient of each frequency point in the effective bandwidth range and storing the weighting coefficient in the second RAM; and the signal weighting processing unit is used for carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighting signal.
In a third aspect, the invention provides a system for improving the flatness in an output band of a Beidou anti-interference antenna, which comprises the device for improving the flatness in the output band of the Beidou anti-interference antenna and terminal equipment connected with the device.
The beneficial effects that the invention can realize are as follows: the invention detects the amplitude error of different frequency point signals in the band through the amplitude equalization module arranged between the anti-interference processing circuit and the IFFT conversion circuit, then calculates the weighting coefficient of each frequency point, and carries out self-adaptive weighting on the amplitude of each frequency point in the effective bandwidth range, thereby ensuring that the amplitude of each frequency point is kept consistent and improving the in-band flatness of the final anti-interference output.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a method for improving flatness in an output band of a Beidou anti-interference antenna provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a topological structure of a device for improving flatness in an output band of a Beidou anti-interference antenna, provided by an embodiment of the present invention;
fig. 3 is a signal flow diagram of an amplitude equalization module according to an embodiment of the present invention.
Icon: 100-a signal receiving module; 110-an antenna; 120-a radio frequency channel; 130-an analog-to-digital converter; 140-FFT conversion circuit; 200-an anti-interference processing module; 300-amplitude equalization module; 310-a processor; 311-a signal weighting processing unit; 312-a weighting factor analysis unit; 320-first RAM; 330-second RAM; 400-a signal output module; 410-IFFT transformation circuitry; 420-an AGC circuit; 430-a digital-to-analog converter; 440-up-conversion filter circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for improving flatness in an output band of a Beidou anti-interference antenna according to an embodiment of the present invention.
Applicants have discovered that there are many filters present, whether in the analog or digital domain. For an analog filter, along with the continuous improvement of the miniaturization requirement of a device, the unloaded Q value of a microwave resonator is inevitably reduced, and the flatness in a band is deteriorated; in the case of a digital filter, the flatness in the band fluctuates in order to satisfy the out-of-band rejection ratio and other parameters when the filter order is determined, subject to the limitation of the circuit scale. Therefore, the application provides a method for improving the flatness in the output band of the Beidou anti-interference antenna, and the specific steps are as follows.
Step a, obtaining a space signal received by an antenna, and converting the space signal into a corresponding frequency domain signal.
In one embodiment, the spatial signal received by the antenna is down-converted, filtered and amplified by the rf channel, and then converted into a digital signal by the analog-to-digital converter, and then the digital signal is converted into a frequency domain signal by the FFT circuit.
And b, performing anti-interference processing on the frequency domain signal to obtain a corresponding processing signal.
And c, detecting the amplitude difference of all frequency points in the processed signal and analyzing the weighting coefficient of each frequency point in the effective bandwidth range.
In one embodiment, the amplitude equalization module may first store the processed signal in the first RAM in units of each frame, and analyze a first corresponding relationship between all frequency points in each frame of signal and a first address in the first RAM; meanwhile, the weighting coefficients of each frequency point and a reference frequency point in each frame of signal are analyzed according to the effective bandwidth range; storing the weighting coefficients in a second RAM, and calculating a second corresponding relation between each frequency point and a second address in the second RAM; and mapping a third corresponding relation between the first address and the second address according to the first corresponding relation and the second corresponding relation.
Illustratively, the step of analyzing the weighting coefficients of each frequency point and the reference frequency point in each frame of signal according to the effective bandwidth range includes:
according to the formula wAi＝ArefCalculating amplitude errors of all frequency points of each frame signal by using the/Ai (i ═ 1, 2.., N); in the formula, wAiDenotes the amplitude error, ArefRepresenting reference frequency points, and Ai representing each frequency point in each frame signal;
according to the sampling rate fsThe frequency point number N of each frame signal and the simulated intermediate frequency central frequency point f0Calculating the useful signal bandwidth range by the useful signal bandwidth B;
and obtaining the amplitude error of the in-band signal according to the bandwidth range of the useful signal to obtain a final weighting coefficient.
Specifically, after obtaining the amplitude errors of all frequency points of each frame signal, the weighting coefficient of the out-of-band signal may be set to zero according to the bandwidth range of the useful signal, only the amplitude error of the in-band signal is retained, and the amplitude error is used as the weighting coefficient of each frequency point of the in-band signal, which is specifically shown as the following formula:
in the formula, λLDenotes the minimum value, λ, of the effective bandwidth rangeHRepresenting the maximum value of the effective bandwidth range.
And d, carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighted signal.
In one embodiment, when acquiring the weighting signals, the processing signals may be sequentially acquired from the first RAM, while the corresponding weighting coefficients are sequentially acquired from the second RAM according to a third correspondence; and then carrying out amplitude weighting processing on the processing signals according to the weighting coefficients to obtain weighted signals. Specifically, it can be expressed as:
(i＝1,2，...，N)。
and e, converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion filtering processing.
In one embodiment, after the weighted signal after the amplitude weighting processing is obtained, the weighted signal may be converted from the frequency domain to a corresponding time domain signal through an IFFT circuit; secondly, stabilizing the signal amplitude of the time domain signal through an AGC circuit; then, converting the analog signal into an analog signal through a digital-to-analog converter; and finally, outputting through an up-conversion filter circuit formed by an up-converter and a filter circuit.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic view of a topology structure of a device for improving flatness in an output band of a Beidou anti-interference antenna according to an embodiment of the present invention; fig. 3 is a signal flow diagram of an amplitude equalization module according to an embodiment of the present invention.
In an implementation manner, in order to implement the method, an embodiment of the present invention further provides a device for improving flatness in an output band of a beidou anti-interference antenna, where the device includes a signal receiving module 100, an anti-interference processing module 200, an amplitude equalization module 300, and a signal output module 400; the signal receiving module 100 is configured to obtain a spatial signal received by an antenna, and convert the spatial signal into a corresponding frequency domain signal; the anti-interference processing module 200 is configured to perform anti-interference processing on the frequency domain signal to obtain a corresponding processing signal; the amplitude equalization module 300 is configured to detect amplitude differences of all frequency points in the processed signal and calculate a weighting coefficient of each frequency point within an effective bandwidth range; carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighting signal; the signal output module 400 is configured to convert the weighted signal into a corresponding time domain signal, stabilize the signal amplitude of the time domain signal, convert the time domain signal into an analog signal, perform up-conversion processing, and output the analog signal.
In one embodiment, signal receiving module 100 includes an antenna 110; a radio frequency channel 120 connected to the antenna 110; an analog-to-digital converter 130 connected to the radio frequency channel 120; and an FFT conversion circuit 140 connected to the analog-to-digital converter 130.
Specifically, after the spatial signal is received by the antenna 110, down-conversion, filtering and amplification processing is performed in the radio frequency channel 120, and the analog signal is converted into a digital signal by the analog-to-digital converter 130; the digital signal is then converted into a frequency domain signal by the FFT conversion circuit 140.
In one embodiment, the signal output module 400 includes an IFFT transformation circuit 410 connected to the output of the amplitude equalization module 300; an AGC circuit 420 connected to the IFFT circuit 410; a digital-to-analog converter 430 connected to the AGC circuit 420; and an up-conversion filter circuit 440 connected to the digital-to-analog converter 430.
Specifically, the weighted signal output by the amplitude equalization module 300 is converted into a time domain signal by the IFFT circuit 410, and then is converted into an analog signal again by the digital-to-analog converter 430 after the signal amplitude is stabilized by the AGC circuit 420, and the analog signal is up-converted and filtered by the up-conversion filter circuit 440 and then output to the subsequent processing device.
In one embodiment, the amplitude equalization module 300 includes a processor 310; a first RAM320 connected to the processor 310; and a second RAM330 connected to the processor 310; the processor 310 includes a weighting coefficient analysis unit 312 and a signal weighting processing unit 311; specifically, the signal flow of the amplitude equalization module 300 is shown in fig. 3, and the first RAM320 is configured to store the processed signals after the interference-free processing in units of one frame; the weighting coefficient analysis unit 312 is configured to calculate amplitude errors of all frequency points in the processed signal, generate a weighting coefficient of each frequency point according to the effective bandwidth range, and store the weighting coefficient in the second RAM 330. The signal weighting processing unit 311 is configured to perform address control on the first RAM320 and the second RAM330 according to the set frequency and the first corresponding relationship and the second corresponding relationship, acquire the processed signal from the first RAM320, and acquire a weighting coefficient of each frequency point of the processed signal from the second RAM 330; finally, the processor 310 performs amplitude weighting processing on each frequency point within the effective bandwidth range through the weighting coefficient to obtain a corresponding weighted signal and outputs the weighted signal to the IFFT transform circuit.
Further, the embodiment of the invention also provides a system for improving the flatness in the output band of the Beidou anti-interference antenna, which comprises the device for improving the flatness in the output band of the Beidou anti-interference antenna and terminal equipment connected with the device. The terminal equipment can be selected from a server, a PC (personal computer) terminal, a notebook computer and the like.
In summary, the embodiments of the present invention provide a method, an apparatus, and a system for improving flatness in an output band of a beidou anti-interference antenna, including: step a, acquiring a space signal received by an antenna, and converting the space signal into a corresponding frequency domain signal; b, performing anti-interference processing on the frequency domain signal to obtain a corresponding processing signal; step c, detecting the amplitude difference of all frequency points in the processed signal and analyzing the weighting coefficient of each frequency point in the effective bandwidth range; d, carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighted signal; and e, converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion processing. By detecting the amplitude errors of signals of different frequency points in the band, calculating the weighting coefficient of each frequency point and carrying out self-adaptive weighting on the amplitude of each frequency point in the effective bandwidth range, the amplitude of each frequency point is ensured to be consistent, and the in-band flatness of anti-interference output is improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The method for improving the flatness in the output band of the Beidou anti-interference antenna is characterized by comprising the following steps of:
step a, acquiring a space signal received by an antenna, and converting the space signal into a corresponding frequency domain signal;
b, performing anti-interference processing on the frequency domain signal to obtain a corresponding processing signal;
step c, detecting the amplitude difference of all frequency points in the processed signal and analyzing the weighting coefficient of each frequency point in the effective bandwidth range;
d, carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighted signal;
and e, converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion filtering processing.
2. The method of claim 1, wherein step c comprises:
storing the processing signals in a first RAM by taking each frame as a unit, and analyzing a first corresponding relation between all frequency points in each frame signal and a first address in the first RAM;
analyzing the weighting coefficients of each frequency point and a reference frequency point in each frame of signal according to the effective bandwidth range;
storing the weighting coefficients in a second RAM, and calculating a second corresponding relation between each frequency point and a second address in the second RAM;
and mapping a third corresponding relation between the first address and the second address according to the first corresponding relation and the second corresponding relation.
3. The method of claim 2, wherein the step of analyzing the weighting coefficients of the frequency points and the reference frequency points in each frame of signal according to the effective bandwidth range comprises:
according to the formula wAi＝ArefCalculating amplitude errors of all frequency points of each frame signal by using the/Ai (i ═ 1, 2.., N); in the formula, wAiDenotes the amplitude error, ArefRepresenting reference frequency points, and Ai representing each frequency point in each frame signal;
according to the sampling rate fsThe frequency point number N of each frame signal and the simulated intermediate frequency central frequency point f0Calculating the useful signal bandwidth range by the useful signal bandwidth B;
and obtaining the amplitude error of the in-band signal according to the bandwidth range of the useful signal to obtain a final weighting coefficient.
4. The method of claim 2, wherein step d comprises:
sequentially acquiring the processing signals from the first RAM, and simultaneously sequentially acquiring corresponding weighting coefficients from the second RAM according to the third corresponding relation;
and carrying out amplitude weighting processing on the processing signals according to the weighting coefficients to obtain weighted signals.
5. The utility model provides a promote device of anti-interference antenna output in-band flatness of big dipper, a serial communication port, includes: the device comprises a signal receiving module, an anti-interference processing module, an amplitude balancing module and a signal output module;
the signal receiving module is used for acquiring a space signal received by an antenna and converting the space signal into a corresponding frequency domain signal;
the anti-interference processing module is used for carrying out anti-interference processing on the frequency domain signal to obtain a corresponding processing signal;
the amplitude balancing module is used for detecting the amplitude difference of all frequency points in the processing signal and calculating the weighting coefficient of each frequency point in the effective bandwidth range; carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighting signal;
the signal output module is used for converting the weighted signal into a corresponding time domain signal, stabilizing the signal amplitude of the time domain signal, converting the time domain signal into an analog signal, and outputting the analog signal after up-conversion processing.
6. The apparatus of claim 5, wherein the signal receiving module comprises an antenna; a radio frequency channel connected to the antenna; the analog-to-digital converter is connected with the radio frequency channel; and an FFT conversion circuit connected with the analog-to-digital converter.
7. The apparatus of claim 5, wherein the signal output module comprises an IFFT transform circuit connected to an output of the amplitude equalization module; an AGC circuit connected to the IFFT conversion circuit; the digital-to-analog converter is connected with the AGC circuit; and the up-conversion filter circuit is connected with the digital-to-analog converter.
8. The apparatus of claim 5, wherein the amplitude equalization module comprises a processor; a first RAM connected to the processor; and a second RAM connected to the processor; the processor comprises a weighting coefficient analysis unit and a signal weighting processing unit; the first RAM is used for storing processing signals; the weighting coefficient analysis unit is used for detecting the amplitude difference of all frequency points in the processed signal, calculating the weighting coefficient of each frequency point in the effective bandwidth range and storing the weighting coefficient in the second RAM; and the signal weighting processing unit is used for carrying out amplitude weighting processing on each frequency point in the effective bandwidth range according to the weighting coefficient to obtain a corresponding weighting signal.
9. A system for improving flatness in an output band of a Beidou anti-interference antenna, which is characterized by comprising the device of any one of claims 5 to 8 and terminal equipment connected with the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110091828.2A CN112904378B (en) | 2021-01-23 | 2021-01-23 | Method, device and system for improving output in-band flatness of Beidou anti-interference antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110091828.2A CN112904378B (en) | 2021-01-23 | 2021-01-23 | Method, device and system for improving output in-band flatness of Beidou anti-interference antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112904378A true CN112904378A (en) | 2021-06-04 |
| CN112904378B CN112904378B (en) | 2024-03-12 |
Family
ID=76117675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110091828.2A Active CN112904378B (en) | 2021-01-23 | 2021-01-23 | Method, device and system for improving output in-band flatness of Beidou anti-interference antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112904378B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050078763A1 (en) * | 2003-10-08 | 2005-04-14 | Won-Joon Choi | Apparatus and method of multiple antenna transmitter beamforming of high data rate wideband packetized wireless communication signals |
| US20070093224A1 (en) * | 2005-10-26 | 2007-04-26 | Tzero Technologies, Inc. | Method and apparatus for calibrating filtering of a transceiver |
| CN103675842A (en) * | 2013-11-26 | 2014-03-26 | 航天恒星科技有限公司 | Space-frequency joint anti-interference implementation method |
| CN105162459A (en) * | 2015-09-08 | 2015-12-16 | 四川九洲电器集团有限责任公司 | Power calibration method and system of DDS (Direct Digital Synthesizer) broadband signal source |
| CN106385289A (en) * | 2016-09-12 | 2017-02-08 | 武汉虹信通信技术有限责任公司 | Method and system for improving in-band flatness of network optimization equipment |
| CN110336572A (en) * | 2019-06-11 | 2019-10-15 | 三维通信股份有限公司 | A kind of gain flatness compensation method of transceiver |
-
2021
- 2021-01-23 CN CN202110091828.2A patent/CN112904378B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050078763A1 (en) * | 2003-10-08 | 2005-04-14 | Won-Joon Choi | Apparatus and method of multiple antenna transmitter beamforming of high data rate wideband packetized wireless communication signals |
| US20070093224A1 (en) * | 2005-10-26 | 2007-04-26 | Tzero Technologies, Inc. | Method and apparatus for calibrating filtering of a transceiver |
| CN103675842A (en) * | 2013-11-26 | 2014-03-26 | 航天恒星科技有限公司 | Space-frequency joint anti-interference implementation method |
| CN105162459A (en) * | 2015-09-08 | 2015-12-16 | 四川九洲电器集团有限责任公司 | Power calibration method and system of DDS (Direct Digital Synthesizer) broadband signal source |
| CN106385289A (en) * | 2016-09-12 | 2017-02-08 | 武汉虹信通信技术有限责任公司 | Method and system for improving in-band flatness of network optimization equipment |
| CN110336572A (en) * | 2019-06-11 | 2019-10-15 | 三维通信股份有限公司 | A kind of gain flatness compensation method of transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112904378B (en) | 2024-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9705477B2 (en) | Compensator for removing nonlinear distortion | |
| US9160310B2 (en) | Linearity compensator for removing nonlinear distortion | |
| CN111092836B (en) | Signal modulation mode identification method and device | |
| CN109981122A (en) | Eliminate Intermodulation Interference | |
| EP2938034B1 (en) | Method and system for updating predistortion coefficient | |
| CN111697991B (en) | Method and wireless communication device for providing nonlinear self-interference cancellation | |
| US8750804B2 (en) | Applying spurious interference rejection to detect incumbent users of television channels | |
| WO2020238349A1 (en) | Group delay ripple calibration method, storage medium and electronic apparatus | |
| CN110336572A (en) | A kind of gain flatness compensation method of transceiver | |
| US7696761B2 (en) | Spectrum analyzing method, distortion detector and distortion compensation amplifying device | |
| CN113283297A (en) | Method for estimating partial discharge signal time based on singular value decomposition and improved wavelet packet | |
| US7653362B2 (en) | Method and apparatus for on-chip measurement of power amplifier AM/AM and AM/PM non-linearity | |
| CN103701515B (en) | Digital multi-beam forming method | |
| CN111343113B (en) | Phase synchronization improvement method and device based on digital oscilloscope | |
| CN112904378A (en) | Method, device and system for improving flatness in output band of Beidou anti-interference antenna | |
| CN114384559B (en) | Signal processing method and system based on space-time adaptive anti-interference algorithm | |
| CN113406672B (en) | Piecewise linear frequency modulation interference elimination method based on self-adaptive windowing | |
| CN115062729A (en) | Classification model and training method, classification method, device and medium thereof | |
| CN113299284B (en) | Speech recognition device, method, equipment and medium based on adaptive filtering | |
| CN112737668B (en) | Satellite communication signal high-precision modulation classification method, device and system | |
| CN114420153A (en) | Sound quality adjusting method, device, equipment and storage medium | |
| CN106788449A (en) | A kind of real-time power quality data parametrization compression method | |
| Miar et al. | Simplified DFT: A novel method for wideband spectrum sensing in cognitive radio | |
| CN115801029B (en) | Method, apparatus and medium for canceling IM2 signal of zero intermediate frequency receiver | |
| CN116821618B (en) | Sea surface monitoring radar clutter suppression method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |