CN110943747A - Broadband microwave signal capturing method and system - Google Patents
Broadband microwave signal capturing method and system Download PDFInfo
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- CN110943747A CN110943747A CN201911139774.1A CN201911139774A CN110943747A CN 110943747 A CN110943747 A CN 110943747A CN 201911139774 A CN201911139774 A CN 201911139774A CN 110943747 A CN110943747 A CN 110943747A
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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
- H04B1/69—Spread spectrum techniques
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- H04B1/7075—Synchronisation aspects with code phase acquisition
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Abstract
The invention discloses a broadband microwave signal capturing method, which comprises the following steps: collecting 1 point for K data at N points every interval, collecting M times to generate N extraction signals, performing serial-parallel conversion on the N extraction signals to generate a signal sequence S1…SN(ii) a Generating locally decimated orthogonal carrier signals, S1Multiplying the quadrature carrier signal to produce a first downconverted signal; generating a locally extracted code signal, and performing correlation operation on the first down-converted signal and the code signal to obtain a sequence S1Is calculated as a sequence R1(ii) a For N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN(ii) a To R1,R2…RNAnd interleaving and performing serial-to-parallel conversion to generate a serial sequence P, and judging the maximum value in the serial sequence P, wherein the code phase corresponding to the maximum value is the captured code phase, and the frequency corresponding to the maximum value is the captured carrier frequency. Technique of the inventionThe scheme extracts and blocks the high-speed data, and blocks and parallelly processes the signals to realize the capture and reception of the broadband signals.
Description
Technical Field
The invention relates to the field of microwave signal acquisition, in particular to a broadband microwave signal acquisition method and system.
Background
The bandwidth occupied by the signals used by the traditional two-way time synchronization system is maximum 40MHz, the signals can be received by adopting the traditional pseudo code capturing method, and the processing capacity of the existing hardware can also meet the processing requirement. For a novel broadband microwave two-way time comparison signal, the bandwidth reaches 200MHz or even more, the system sampling rate must reach more than 500MHz, which far exceeds the existing mainstream hardware large data volume complex real-time signal processing capability, the existing mainstream spread spectrum rapid capture method is directed at a narrowband spread spectrum signal below 50MHz, and an effective capture method is not found for the broadband spread spectrum signal.
In view of the above, the present invention provides a method and a system for acquiring a broadband microwave signal, so as to solve the problem of acquiring a broadband microwave signal.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method and a system for acquiring a broadband microwave signal, so as to solve the problems in the prior art.
In a first aspect, the present invention provides a method for capturing a broadband microwave signal, including: the number of data used for signal capture each time of the broadband microwave signal is K, 1 point is collected for K data every N points, N extraction signals are generated by collecting M times, each data block contains M data, N, M, K meets the condition that K is N M, serial-parallel conversion is carried out on N extraction signals, and a signal sequence S is generated1…SN(ii) a Extracting the signal S from the first of N extracted signals1To generate a locally extracted quadrature carrier signal, S1Multiplying the quadrature carrier signal to produce a first downconverted signal; according to S1Generating a locally extracted code signal, the first down-converted signal being correlated with the code signal to obtain a sequence S1Is calculated as a sequence R1(ii) a For N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN(ii) a To R1,R2…RNAnd interleaving and performing serial-to-parallel conversion to generate a serial sequence P, and judging the maximum value in the serial sequence P, wherein the code phase corresponding to the maximum value is the captured code phase, and the frequency corresponding to the maximum value is the captured carrier frequency.
In a second aspect, the present invention also provides a broadband microwave signal acquisition system, including: the extraction module is used for acquiring data of the broadband microwave signal at each time, wherein the number of the data used for signal acquisition is K, 1 point is acquired for the K data at every N points, N extraction signals are generated by acquiring M times, each data block comprises M data, and N, M, K meets the condition that K is N M; a serial-to-parallel conversion module for performing serial-to-parallel conversion on the N extracted signals to generate a signal sequence S1…SN(ii) a A control unit for extracting the first signal S from the N extracted signals1To generate a locally extracted quadrature carrier signal, S1Multiplying with the orthogonal carrier signal to produce a first down-converted signal, based on S1Generating a locally extracted code signal, the first down-converted signal being correlated with the code signal to obtain a sequence S1Is calculated as a sequence R1For N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN(ii) a Parallel-to-serial conversion module, to R1,R2…RNInterleaving and serial-to-parallel conversion to generate a serial sequence P; and the acquisition result judging module is used for judging the maximum value in the serial sequence P, wherein the code phase corresponding to the maximum value is the acquired code phase, and the frequency corresponding to the maximum value is the acquired carrier frequency.
The invention has the following beneficial effects:
the technical scheme provided by the invention can have the following beneficial effects: the technical scheme provided by the invention can be used for carrying out speed reduction, extraction and blocking on high-speed data and carrying out blocking and parallel processing on signals, thereby realizing capture and reception of broadband signals and reducing hardware receiving cost.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a method for capturing broadband microwave signals according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a broadband microwave signal capturing system according to a second embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the described embodiments are some, but not all embodiments of the present invention.
The first embodiment is as follows:
fig. 1 is a schematic flow chart of a method for capturing a broadband microwave signal according to a first embodiment of the present invention, and as shown in fig. 1, the method includes the following four steps.
Step S101: n decimated signals are generated for K data. Specifically, the number of data used for signal capture each time of the broadband microwave signal is K, 1 point is collected for K data every N points, N extraction signals are generated by collecting M times, each data block contains M data, N, M, K meets the condition that K is N x M, serial-to-parallel conversion is performed on the N extraction signals, and a signal sequence S is generated1…SN。
Step S102: a down-converted signal is generated. In particular, a signal S is decimated based on a first of N decimated signals1To generate a locally extracted quadrature carrier signal, S1The first down-converted signal is generated by multiplying the quadrature carrier signal. For N decimated signals exceptS1The other extracted signals are summed with S1The same calculation produces the down-converted signal of the remaining decimated signal.
Step S103: and the signals are subjected to correlation operation to obtain a calculation result sequence. In particular, according to S1Generating a locally extracted code signal, the first down-converted signal being correlated with the code signal to obtain a sequence S1Is calculated as a sequence R1(ii) a For N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN. It should be noted that the correlation operation is to calculate the similarity between two signals.
Step S104: the acquired code phase and the acquired carrier frequency are acquired. In particular, to R1,R2…RNAnd interleaving and performing serial-to-parallel conversion to generate a serial sequence P, and judging the maximum value in the serial sequence P, wherein the code phase corresponding to the maximum value is the captured code phase, and the frequency corresponding to the maximum value is the captured carrier frequency.
Example two:
the embodiment of the present invention provides a broadband microwave signal capturing system, which is mainly used for executing the broadband microwave signal capturing method provided by the above-mentioned content of the embodiment of the present invention, and the following describes the broadband microwave signal capturing system provided by the embodiment of the present invention in detail.
Fig. 2 is a schematic structural diagram of a broadband microwave signal capturing system according to a second embodiment of the present invention. As shown in fig. 2, a broadband microwave signal capturing system includes an extraction module 10, a serial-to-parallel conversion module 20, a control unit 30, a parallel-to-serial conversion module 40, and a capturing result judgment module 50.
The extraction module 10, the number of data used for signal capture each time of the broadband microwave signal is K, 1 point is collected for every N points of K data, N extraction signals are generated by collecting M times, each data block contains M data, and N, M, K meets the condition that K is N × M;
a serial-to-parallel conversion module 20 for performing serial-to-parallel conversion on the N extracted signals to generate a signal sequence S1…SN；
Control sheetElement 30, extracting signal S from a first of N extracted signals1To generate a locally extracted quadrature carrier signal, S1Multiplying with the orthogonal carrier signal to produce a first down-converted signal, based on S1Generating a locally extracted code signal, the first down-converted signal being correlated with the code signal to obtain a sequence S1Is calculated as a sequence R1For N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN；
Parallel-to-serial conversion module 40 for R1,R2…RNInterleaving and serial-to-parallel conversion to generate a serial sequence P;
the capture result determining module 50 determines a maximum value in the serial sequence P, where a code phase corresponding to the maximum value is a captured code phase, and a frequency corresponding to the maximum value is a captured carrier frequency.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A method for broadband microwave signal acquisition, comprising:
the number of data used for signal capture of the broadband microwave signal at each time is K, 1 point is collected for the K data at every N points, N extraction signals are generated by collecting M times, and the broadband microwave signal is obtained by the methodEach data block of (a) contains M data, said N, M, K satisfies K-N-M, said N decimated signals are serial-to-parallel converted to generate a signal sequence S1…SN；
According to the first extracted signal S in the N extracted signals1Generating a locally extracted quadrature carrier signal, said S1Multiplying the quadrature carrier signal to produce a first downconverted signal; according to the S1Generating a locally extracted code signal, said first down-converted signal being correlated with said code signal to obtain a sequence S1Is calculated as a sequence R1；
For the N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN；
For the R1,R2…RNInterleaving and serial-to-parallel conversion are carried out to generate a serial sequence P, the maximum value in the serial sequence P is judged, the code phase corresponding to the maximum value is the captured code phase, and the frequency corresponding to the maximum value is the captured carrier frequency.
2. A broadband microwave signal acquisition system, comprising:
an extraction module (10), wherein the number of data used for signal capture of the broadband microwave signal each time is K, 1 point is acquired for the K data every N points, and N extraction signals are generated by acquiring M times, each data block contains M data, and the N, M, K meets the condition that K is N x M;
a serial-to-parallel conversion module (20) for performing serial-to-parallel conversion on the N extracted signals to generate a signal sequence S1…SN；
A control unit (30) for extracting a signal S from a first one of said N extracted signals1Generating a locally extracted quadrature carrier signal, said S1Multiplying the quadrature carrier signal to produce a first downconverted signal; according to the S1Generating a locally extracted code signal, said first down-converted signal and said code signalThe signals are correlated to obtain a sequence S1Is calculated as a sequence R1(ii) a For the N decimated signals except S1The other extracted signals are summed with S1Same calculation to obtain R2…RN；
A parallel-to-serial conversion module (40) for said R1,R2…RNInterleaving and serial-to-parallel conversion to generate a serial sequence P;
and the acquisition result judging module (50) is used for judging the maximum value in the serial sequence P, wherein the code phase corresponding to the maximum value is the acquired code phase, and the frequency corresponding to the maximum value is the acquired carrier frequency.
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| CN115499036A (en) * | 2022-11-14 | 2022-12-20 | 北京航空航天大学合肥创新研究院(北京航空航天大学合肥研究生院) | Parallel capturing method and storage medium for broadband spread spectrum signal |
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