CN114217664A - Comb spectrum transmission control method, device and circuit - Google Patents
Comb spectrum transmission control method, device and circuit Download PDFInfo
- Publication number
- CN114217664A CN114217664A CN202111335414.6A CN202111335414A CN114217664A CN 114217664 A CN114217664 A CN 114217664A CN 202111335414 A CN202111335414 A CN 202111335414A CN 114217664 A CN114217664 A CN 114217664A
- Authority
- CN
- China
- Prior art keywords
- comb spectrum
- amplitude
- data
- frequency
- transmission control
- 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.)
- Pending
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 148
- 230000005540 biological transmission Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000013139 quantization Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention provides a comb spectrum transmission control method, a comb spectrum transmission control device and a comb spectrum transmission control circuit, wherein the comb spectrum transmission control method comprises the following steps: constructing original comb spectrum data according to the frequency and the amplitude; outputting the comb spectrum original data to a processing module for pre-storing; responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to a digital-to-analog converter; the invention can generate the comb spectrum signals with any frequency point, any frequency interval, any spectral line number and any amplitude according to the requirement, and realize the real-time online configuration of the comb spectrum frequency and amplitude.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a comb spectrum transmission control method, a comb spectrum transmission control device and a comb spectrum transmission control circuit.
Background
Comb spectrum circuit has wide application in the field of electronic countermeasure. At present, two methods, namely an analog method and a digital method, are mainly used for realizing the comb spectrum, and the traditional comb spectrum realizing method is mainly used for amplifying and accumulating the energy of a fundamental frequency signal, promoting a step diode to generate a step, so that the comb spectrum is realized.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a comb spectrum transmission control method, a comb spectrum transmission control device and a comb spectrum transmission control circuit, and mainly solves the problem that the comb spectrum generated by the existing method is limited in frequency and amplitude and cannot meet the requirements of practical application.
In order to achieve the above and other objects, the present invention adopts the following technical solutions.
A comb spectrum transmission control method comprises the following steps:
constructing original comb spectrum data according to the frequency and the amplitude;
outputting the comb spectrum original data to a processing module for pre-storing;
and responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to a digital-to-analog converter.
Optionally, constructing comb spectrum raw data according to frequency and amplitude, including:
generating a plurality of frequency point signals according to a preset frequency factor, wherein the frequency factor represents a set of a plurality of comb spectrum frequency points;
performing amplitude modulation on the frequency point signals according to preset amplitude factors to obtain modulation signals, wherein the amplitude factors comprise frequency point amplitudes corresponding to the comb spectrum frequency points in number;
and splitting and recombining the modulation signals to obtain the original comb spectrum data.
Optionally, generating a frequency point signal according to a preset frequency factor includes:
and constructing the initial amplitude of the frequency point signal according to the quantization bit width of the digital-to-analog converter, and calculating to obtain the frequency point signal corresponding to each comb spectrum frequency point according to the initial amplitude.
Optionally, performing amplitude modulation on the frequency point signal according to a preset amplitude factor to obtain a modulated signal, including:
multiplying each frequency point signal by the corresponding frequency point amplitude in the amplitude factor respectively and then summing to obtain an initial modulation signal;
and dividing the initial modulation signal by the sum of the amplitudes of the frequency points in the amplitude factor to obtain the modulation signal.
Optionally, splitting and recombining the modulation signal to obtain the original comb spectrum data, including:
and setting the splitting path number of the tuning signal according to the multiphase interpolation multiple of the digital-to-analog converter, and if the modulation signal is split into I path signals, the data clock in the processing module is 1/I of the data clock of the digital-to-analog converter.
Optionally, the processing module comprises an FPGA.
Optionally, the initial amplitude is represented as:
amp＝2b-1
wherein b is the quantization bit width of the digital-to-analog converter, and amp is the initial amplitude.
A comb spectrum transmission control device comprising:
the comb spectrum construction module is used for constructing original comb spectrum data according to frequency and amplitude;
the comb spectrum pre-storing module is used for outputting the comb spectrum original data to the processing module for pre-storing;
and the comb spectrum transmission module is used for responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to the digital-to-analog converter.
A comb spectrum transmission control circuit comprising: the device comprises a memory chip, a clock chip and the processing module; the processing module is connected with a terminal for generating original comb spectrum data; the memory chip and the clock chip are respectively connected with the processing module, the processing module acquires the comb spectrum original data from the terminal and stores the comb spectrum original data in the memory chip, the processing module is connected with the digital-to-analog converter through a data interface, the stored comb spectrum original data are read from the memory chip and output to the digital-to-analog converter.
As described above, the comb spectrum transmission control method, device and circuit of the present invention have the following advantages.
The invention can generate original comb spectrum data according to the required comb spectrum frequency and amplitude, and pre-store the original comb spectrum data in the processing module, thereby reducing the calculation amount of the processing module, saving the resources of the processing module, realizing real-time online comb spectrum configuration transmission, and meeting the sampling requirements of different signal bandwidths of a digital-to-analog converter.
Drawings
FIG. 1 is a schematic block diagram of the comb spectrum raw data generation in an embodiment of the present invention.
FIG. 2 is a block diagram of comb spectrum raw data generation in another embodiment of the present invention.
Fig. 3 is a schematic block diagram of comb spectrum transmission control according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides a comb spectrum transmission control method, which includes constructing original comb spectrum data according to frequency and amplitude; outputting the comb spectrum original data to a processing module for pre-storing; and responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to a digital-to-analog converter.
In an embodiment, comb spectrum original data which can be directly used by the DAC can be generated at a computer terminal or other terminals with operational capability through simulation software according to required frequency and amplitude, and then the generated comb spectrum original data is sent to a specific processing module for comb spectrum pre-storage. Alternatively, the processing module may comprise a programmable gate array FPGA or other processor chip. Taking the FPGA as an example, the FPGA receives original comb spectrum data and stores the data in a data storage chip. And after receiving the comb spectrum signal output command, the FPG reads comb spectrum original data from the storage chip and directly sends the data to the DAC through the high-speed interface to complete data conversion and output the required comb spectrum signal.
In one embodiment, constructing comb spectrum raw data from frequency and amplitude includes:
generating a plurality of frequency point signals according to a preset frequency factor, wherein the frequency factor represents a set of a plurality of comb spectrum frequency points;
performing amplitude modulation on the frequency point signals according to preset amplitude factors to obtain modulation signals, wherein the amplitude factors comprise frequency point amplitudes corresponding to the comb spectrum frequency points in number;
and splitting and recombining the modulation signals to obtain the original comb spectrum data.
Specifically, referring to fig. 1, the original comb spectrum data may be generated at the PC end, and the amplitude and the frequency may be configured online through the PC end, so as to adjust the amplitude and the frequency of the generated original comb spectrum data in real time. The comb spectrum original data is generated through the steps of signal generation, amplitude control, data splitting and recombining and the like.
Referring to fig. 2, in an embodiment, the generating step of the original comb spectrum data including multiple frequency points is as follows:
assuming that the original comb spectrum data contains M frequency point signals, the interpolation factor of the DAC is I. Frequency point control factor (comb spectrum frequency point set) f according to comb spectrum signalcSampling ratefsSignal amplitude factor a and data point length N, and establishing an expected signal frequency set s. Wherein f isc＝[f1,f2,…,fM]，a＝[a1,a2,…,aM]， fMIndicates the Mth frequency point frequency, aMAnd M represents the amplitude of the Mth frequency point, and M represents the number of comb spectrum frequency points. The specific generation steps of the comb spectrum original data are as follows:
firstly, constructing frequency point signals with the same amplitude, wherein the construction formula is as follows:
s＝amp*ej*2*pi*fc*t
wherein, amp is determined by DAC quantization bit width, and the calculation formula is: amp 2b-1。
Step two, multiplying each constructed frequency point signal by an amplitude factor a, then adding and summing all signals, and calculating by using a matrix in Matlab, wherein the calculation formula is as follows:
ssum＝a*s
thirdly, summing the amplitude factors a of all frequency point signals, wherein the calculation formula is as follows:
asum＝sum(a)
a fourth step of summing all the signals, s, to ensure that the signal amplitude does not overflow during the DAC conversionsumDivided by the sum of the amplitude factors asumObtaining the comb spectrum data which is subjected to amplitude control and meets the DAC bit width limitation, wherein the calculation expression is as follows:
savg＝ssum/asum
fifthly, splitting the modulation signal obtained in the previous step into I paths, wherein I is a multi-phase interpolation multiple of the signal in a DAC, so that a data clock in the FPGA is 1/I time of the DAC clock, and a data splitting expression is as follows:
sixthly, recombining the split signals, wherein the aim of recombination is that the FPGA can conveniently read expected data from different continuous address intervals to facilitate processing when reading data from a memory, and the combination mode is as follows:
data＝[data1,…,dataI]
and seventhly, issuing the recombined signals to the FPGA and storing the signals into a memory.
And eighthly, after the original comb spectrum data are stored, the upper computer can send a comb spectrum signal output command. And once the FPGA receives the comb spectrum output command, the FPGA reads original comb spectrum data from the memory, combines the comb spectrum data according to the format of the data transmission interface and sends the combined comb spectrum data to the DAC, and the DAC outputs a comb spectrum signal after finishing DA conversion of the data.
In an embodiment, the present invention further provides a comb spectrum transmission control apparatus, configured to execute the comb spectrum transmission control method described in the foregoing method embodiment. Since the technical principle of the embodiment of the apparatus is similar to that of the embodiment of the method, repeated description of the same technical details is omitted.
In one embodiment, the comb spectrum transmission control device comprises: the comb spectrum construction module is used for constructing original comb spectrum data according to frequency and amplitude; the comb spectrum pre-storing module is used for outputting the comb spectrum original data to the processing module for pre-storing; and the comb spectrum transmission module is used for responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to the digital-to-analog converter.
In an embodiment, the present invention further provides a comb spectrum transmission control circuit, which includes a memory chip, a clock chip and the processing module; the processing module is connected with a terminal for generating original comb spectrum data; the memory chip and the clock chip are respectively connected with the processing module, the processing module acquires the comb spectrum original data from the terminal and stores the comb spectrum original data in the memory chip, the processing module is connected with the digital-to-analog converter through a data interface, and the stored comb spectrum original data is read from the memory chip and output to the digital-to-analog converter.
Referring to fig. 3, in an embodiment, the processing module may include an FPGA with a JESD204B high-speed data interface, and the FPGA is connected to a PC installed with a tera network card and MATLAB emulation software through an ethernet optical fiber interface. The FPGA writes data received from the PC into the memory chip or reads the data from the memory chip in an SPI communication mode; the DAC working parameters are configured through SPI interfaces of the FPGA and the DAC chip, and DAC conversion data are transmitted through JESD204B interfaces between the FPGA and the high-speed DAC. The clock chip generates related time sequence signals to be provided for the FPGA and the high-speed DAC, so that the transmission of high-speed data streams is realized.
In summary, the comb spectrum transmission control method, device and circuit of the present invention utilize numbers to realize the generation of comb spectrum signals, and compared with the traditional analog generation mode, the method and device provided by the present invention get rid of the limitation of specific devices, and can generate comb spectrum signals with any frequency point, any frequency interval, any number of spectral lines and any amplitude as required; the method for directly synthesizing the comb spectrum by using the figures can directly generate the comb spectrum within the frequency range of 1 MHz-6 GHz, the process of combing the original spectrum data of the method is carried out on a PC (personal computer), the limitation of FPGA (field programmable gate array) hardware resources on the calculation of the original comb spectrum data is avoided, the frequency interval of the ultra-wideband digital comb spectrum signal generated by using the method can be as small as Hz, and the signal bandwidth can be as large as DAC (digital-to-analog converter) sampling rate; meanwhile, as FPGA resources are limited, the main operation process of the algorithm is not carried out on the FPGA, the operation pressure of the FPGA is reduced, the FPGA resources are saved, and the frequency, the number of spectral lines, the bandwidth, the amplitude and the like of the comb spectrum can be easily configured on line in real time. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A comb spectrum transmission control method is characterized by comprising the following steps:
constructing original comb spectrum data according to the frequency and the amplitude;
outputting the comb spectrum original data to a processing module for pre-storing;
and responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to a digital-to-analog converter.
2. The comb spectrum transmission control method according to claim 1, wherein constructing comb spectrum raw data from frequency and amplitude comprises:
generating a plurality of frequency point signals according to a preset frequency factor, wherein the frequency factor represents a set of a plurality of comb spectrum frequency points;
performing amplitude modulation on the frequency point signals according to preset amplitude factors to obtain modulation signals, wherein the amplitude factors comprise frequency point amplitudes corresponding to the comb spectrum frequency points in number;
and splitting and recombining the modulation signals to obtain the original comb spectrum data.
3. The comb spectrum transmission control method according to claim 1 or 2, wherein generating a frequency point signal according to a preset frequency factor comprises:
and constructing the initial amplitude of the frequency point signal according to the quantization bit width of the digital-to-analog converter, and calculating to obtain the frequency point signal corresponding to each comb spectrum frequency point according to the initial amplitude.
4. The comb spectrum transmission control method according to claim 2, wherein performing amplitude modulation on the frequency point signal according to a preset amplitude factor to obtain a modulated signal comprises:
multiplying each frequency point signal by the corresponding frequency point amplitude in the amplitude factor respectively and then summing to obtain an initial modulation signal;
and dividing the initial modulation signal by the sum of the amplitudes of the frequency points in the amplitude factor to obtain the modulation signal.
5. The comb spectrum transmission control method according to claim 1 or 2, wherein splitting and recombining the modulation signal to obtain the comb spectrum original data comprises:
and setting the splitting path number of the tuning signal according to the multiphase interpolation multiple of the digital-to-analog converter, wherein if the modulation signal is split into I path signals, the data clock in the processing module is 1/I of the data clock of the digital-to-analog converter.
6. The comb spectrum transmission control method according to claim 1, wherein the processing module comprises an FPGA.
7. The comb spectrum transmission control method according to claim 3, wherein the initial amplitude is expressed as:
amp＝2b-1
wherein b is the quantization bit width of the digital-to-analog converter, and amp is the initial amplitude.
8. A comb spectrum transmission control device, comprising:
the comb spectrum construction module is used for constructing original comb spectrum data according to frequency and amplitude;
the comb spectrum pre-storing module is used for outputting the comb spectrum original data to the processing module for pre-storing;
and the comb spectrum transmission module is used for responding to a comb spectrum signal output command, reading the comb spectrum original data in the processing module and outputting the comb spectrum original data to the digital-to-analog converter.
9. A comb spectrum transmission control circuit, characterized by a memory chip, a clock chip and a processing module as claimed in any one of claims 1 to 7; the processing module is connected with a terminal for generating original comb spectrum data; the processing module is connected with the digital-to-analog converter through a data interface, reads the stored comb spectrum original data from the storage chip and outputs the comb spectrum original data to the digital-to-analog converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335414.6A CN114217664A (en) | 2021-11-11 | 2021-11-11 | Comb spectrum transmission control method, device and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111335414.6A CN114217664A (en) | 2021-11-11 | 2021-11-11 | Comb spectrum transmission control method, device and circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114217664A true CN114217664A (en) | 2022-03-22 |
Family
ID=80697006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111335414.6A Pending CN114217664A (en) | 2021-11-11 | 2021-11-11 | Comb spectrum transmission control method, device and circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114217664A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244526A (en) * | 2011-06-09 | 2011-11-16 | 中国工程物理研究院电子工程研究所 | All-digital generation method of dense broadband comb spectrum signals |
| CN102426472A (en) * | 2011-08-19 | 2012-04-25 | 徐华中 | Hardware-in-the-loop generator and use method thereof |
| CN206432967U (en) * | 2017-02-20 | 2017-08-22 | 四川鸿创电子科技有限公司 | A kind of comb spectrum signal generator based on FPGA |
| CN108306640A (en) * | 2018-01-12 | 2018-07-20 | 中国人民解放***箭军工程大学 | A kind of broadband rf signal generation system |
-
2021
- 2021-11-11 CN CN202111335414.6A patent/CN114217664A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244526A (en) * | 2011-06-09 | 2011-11-16 | 中国工程物理研究院电子工程研究所 | All-digital generation method of dense broadband comb spectrum signals |
| CN102426472A (en) * | 2011-08-19 | 2012-04-25 | 徐华中 | Hardware-in-the-loop generator and use method thereof |
| CN206432967U (en) * | 2017-02-20 | 2017-08-22 | 四川鸿创电子科技有限公司 | A kind of comb spectrum signal generator based on FPGA |
| CN108306640A (en) * | 2018-01-12 | 2018-07-20 | 中国人民解放***箭军工程大学 | A kind of broadband rf signal generation system |
Non-Patent Citations (1)
| Title |
|---|
| 孙杰: "雷达对抗模拟器关键技术的研究", 《中国优秀硕士学位论文全文数据库（电子期刊）信息科科技辑》, 15 May 2013 (2013-05-15), pages 136 - 615 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103488244B (en) | A kind of random waveform generation systems and method | |
| CN107169244B (en) | Electromechanical-electromagnetic transient hybrid simulation interface system and method | |
| CN108710404B (en) | Mixed signal generator | |
| CN103179066A (en) | Multi-system phase shifting keying (MPSK) modulation method, MPSK modulation device and function signal generator | |
| CN102904550A (en) | Multi-channel synchronous waveform generator based on AD9959 | |
| CN102468806A (en) | White noise signal generator | |
| CN104935304A (en) | Broadband repetition arbitrary waveform generator and generation method | |
| Schneider et al. | Using digital masks to enhance the bandwidth tolerance and improve the performance of on-chip reservoir computing systems | |
| CN107102683A (en) | A kind of pointwise AWG and production method based on SOC | |
| CN110095761B (en) | MicroBlaze-based MIMO radar echo generation method | |
| CN114217664A (en) | Comb spectrum transmission control method, device and circuit | |
| CN105871337A (en) | Improved signal generator capable of modulating in segmentable mode | |
| CN111090251B (en) | High-speed measurement and control board card implementation method and system | |
| CN203014744U (en) | Arbitrary signal generator based on AD9951 chip and FPGA | |
| CN113705774A (en) | Optical circuit construction method, optical circuit, optical signal processing method and device | |
| CN104836763B (en) | It is a kind of to improve the multi channel signals output system for passing letter rate | |
| CN103490783A (en) | Method for converting analog signals into digital information | |
| CN109714115B (en) | Method, device and equipment for generating remotely configured FPGA (field programmable Gate array) waveform and storage medium | |
| CN201789500U (en) | Train control transponder uplink signal simulating device | |
| CN214586491U (en) | Vector signal generating module | |
| CN202772870U (en) | Arbitrary waveform signal source device based on SOPC | |
| CN104660218A (en) | Arbitrary waveform synthesizer | |
| CN110764734B (en) | Device and method for generating Gaussian white noise by true random number | |
| CN115356688A (en) | Programmable intra-pulse modulation radar signal generation technology | |
| CN117949949B (en) | Pulse radar baseband signal acquisition processing method, device and medium |
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 |