CN106572045B - Modulation system and method for satellite time comparison equivalent bandwidth synthesis signal - Google Patents
Modulation system and method for satellite time comparison equivalent bandwidth synthesis signal Download PDFInfo
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- CN106572045B CN106572045B CN201610856754.6A CN201610856754A CN106572045B CN 106572045 B CN106572045 B CN 106572045B CN 201610856754 A CN201610856754 A CN 201610856754A CN 106572045 B CN106572045 B CN 106572045B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- 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
- G01S19/02—Details of the space or ground control segments
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
Abstract
The invention discloses a modulation system for satellite time comparison equivalent bandwidth synthesis signals, which comprises: a reference frequency module: for generating a reference frequency and a pulse per second signal; a measurement data generation module: the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring floating point type data measured by time comparison and converting the floating point type data into binary data and carrying out error correction coding on the binary data to obtain a binary signal; a spread spectrum signal generation module: the system is used for generating a spread spectrum code signal and combining the binary signal to obtain a spread spectrum signal; a subcarrier signal generation module: for generating subcarrier signals; a synthesized signal generation module: the invention provides an equivalent bandwidth synthetic signal synthesized by two signals, and solves the problem of bandwidth increase caused by improving the time comparison precision of the satellite bidirectional signal.
Description
Technical Field
The invention relates to the field of satellite two-way time comparison. And more particularly to a system and method for modulating a satellite time-alignment equivalent bandwidth composite signal.
Background
the satellite two-way time comparison is the internationally recognized highest-precision time comparison method at present, is widely applied to international high-precision time frequency magnitude remote comparison, and has no substitution in the positions of time frequency magnitude transmission and tracing methods. The satellite bidirectional time comparison utilizes a signal spread spectrum modulation technology to carry out high-precision spread spectrum modulation transmission on the related information of the uplink timing signal, the signal is forwarded in real time through a satellite-ground link, the comparison station carries out quick capture, precise tracking and precise resolving on the downlink comparison signal to obtain the signal propagation delay, and the time difference information between the comparison stations can be accurately obtained by exchanging propagation delay data.
the traditional satellite bidirectional comparison signal mainly adopts a Binary Phase Shift Keying (BPSK) modulation system, and the time comparison precision is limited to nanosecond level. The measurement accuracy of the BPSK time signal depends on the sharpness of the autocorrelation function, the sharper the correlation function is, the higher the measurement accuracy of the time is, the sharpness of the correlation function is increased by increasing the chip rate, so that the bidirectional time comparison accuracy of the satellite is improved, but the bandwidth occupied by the signal is greatly increased by the method, so that the selection of the satellite frequency band by a user is difficult, and the renting cost of the user is greatly increased. Therefore, it is desirable to provide a signal modulation system that improves the satellite bidirectional time comparison accuracy and simultaneously prevents the bandwidth from being greatly increased, so as to solve the problem of the increase of the signal bandwidth caused by the increase of the sharpness of the correlation function.
Disclosure of Invention
In order to solve the above problems, the invention provides a modulation system and a modulation method for satellite time comparison equivalent bandwidth synthesis signals, which can effectively improve the precision of satellite two-way time comparison and simultaneously solve the problem that the signal bandwidth is greatly increased in order to improve the satellite two-way time comparison precision in the traditional signal modulation system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a modulation system of satellite time comparison equivalent bandwidth synthesis signals, which is characterized by comprising the following steps:
A reference frequency module: the second pulse generator is used for generating a reference frequency and generating a second pulse signal according to the reference frequency;
A measurement data generation module: the satellite time comparison and measurement floating point type data are converted into binary data by taking the pulse per second signal as a reference, and the binary data are subjected to error correction coding to obtain a binary signal;
A spread spectrum signal generation module: the frequency multiplier is used for multiplying the reference frequency, so that a spread spectrum code signal is generated by taking the pulse per second signal as a reference, and a spread spectrum signal is obtained according to the spread spectrum code signal and the binary signal;
a subcarrier signal generation module: the second pulse signal is used as a reference to generate a subcarrier signal;
A synthesized signal generation module: for generating an equivalent bandwidth synthesis signal from the spread spectrum signal and the subcarrier signal.
Preferably, the reference frequency module includes a reference frequency generator and a pulse-per-second generator, the reference frequency generator is configured to provide a reference frequency for the measurement data generation module, the spread spectrum signal generation module, and the pulse-per-second generator is configured to receive the reference frequency and generate a pulse-per-second signal.
preferably, the measurement data generating module includes a frequency divider and an information data generator, the frequency divider is configured to receive the reference frequency and process the reference frequency to obtain an information frame pulse control signal, and the information data generator is configured to convert floating point type data measured by satellite time comparison into binary data according to the information frame pulse control signal, and perform error correction coding on the binary data to obtain a binary signal.
Preferably, the spread spectrum signal generating module includes a first frequency multiplier, a spread spectrum code generator, and a first multiplier, where the first frequency multiplier is configured to receive the reference frequency, generate a spread spectrum code rate, and output the reference frequency to the subcarrier signal generating module, the spread spectrum code generator is configured to receive the spread spectrum code rate, and generate a spread spectrum code signal, and the first multiplier is configured to receive the spread spectrum code signal, perform a multiplication operation on the spread spectrum code signal and the binary signal, and generate a spread spectrum signal.
preferably, the first frequency multiplier is configured to generate a spreading code rate with a frequency that is an integer multiple of the reference frequency.
preferably, the subcarrier signal generating module includes a second frequency multiplier and a subcarrier generator, the second frequency multiplier is configured to receive the reference frequency transmitted by the spread spectrum signal generating module and generate a subcarrier rate, and the subcarrier generator is configured to receive the subcarrier rate and generate a sinusoidal subcarrier signal.
Preferably, the second frequency multiplier is configured to generate a subcarrier rate with a frequency that is an integer multiple of the reference frequency.
Preferably, the synthesized signal generating module includes a second multiplier, and the second multiplier is configured to receive the spread spectrum signal and the subcarrier signal, and perform a multiplication operation on the spread spectrum signal and the subcarrier signal to generate an equivalent bandwidth synthesized signal.
Preferably, the synthesized signal generating module is configured to generate an equivalent bandwidth synthesized signal with signal power located at a position two sides of the carrier frequency and 1 time the subcarrier frequency width from the center of the carrier frequency.
the invention also discloses a method for modulating the satellite time comparison equivalent bandwidth synthesis signal, which is characterized by comprising the following steps:
s1: generating a reference frequency and generating a pulse per second signal according to the reference frequency;
S2: taking the pulse per second signal as a reference, converting floating point type data measured by satellite time comparison into binary data, and carrying out error correction coding on the binary data to obtain a binary signal;
s3: carrying out frequency multiplication on the reference frequency so as to generate a spread spectrum code signal by taking the pulse per second signal as a reference, and obtaining a spread spectrum signal according to the binary signal and the spread spectrum code signal;
s4: frequency multiplication is carried out on the reference frequency, so that a subcarrier signal is generated by taking the pulse per second signal as a reference;
S5: and obtaining an equivalent bandwidth synthesis signal according to the spread spectrum signal and the subcarrier signal.
The invention has the following beneficial effects:
The invention provides an equivalent bandwidth synthetic signal synthesized by two signals, which improves the time comparison precision of a satellite bidirectional signal and solves the problem that the bandwidth of the satellite bidirectional time comparison signal is greatly increased in the traditional mode to improve the satellite bidirectional time comparison precision.
Drawings
the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
fig. 1 shows a schematic structural diagram of a modulation system for satellite time ratio to equivalent bandwidth composite signals disclosed in the present invention.
Fig. 2 is a schematic structural diagram illustrating a preferred embodiment of a modulation system for satellite time ratio equivalent bandwidth composite signals according to the present invention.
Fig. 3 shows waveforms of signals during modulation of a satellite time ratio versus an equivalent bandwidth composite signal.
Fig. 4 shows a flowchart of a method for modulating a satellite time ratio to an equivalent bandwidth composite signal according to the present disclosure.
Detailed Description
in order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
As shown in fig. 1, in one aspect, the present invention discloses a modulation system for satellite time ratio equivalent bandwidth synthesized signals, including:
a reference frequency module: the frequency synthesizer is used for generating a reference frequency and generating a pulse per second signal according to the reference frequency, and comprises a reference frequency generator 1 and a pulse per second generator 2, wherein the reference frequency generator 1 is used for providing the reference frequency for the measurement data generation module, the spread spectrum signal generation module and the pulse per second generator 2, and the pulse per second generator 2 is used for receiving the reference frequency and generating the pulse per second signal.
A measurement data generation module: the satellite time comparison and measurement device comprises a frequency divider 3 and an information data generator 4, wherein the frequency divider 3 is used for receiving the reference frequency and processing to obtain an information frame pulse control signal, and the information data generator 4 is used for converting the satellite time comparison and measurement floating point type data into binary data according to the information frame pulse control signal and performing error correction coding on the binary data to obtain the binary signal.
a spread spectrum signal generation module: the second pulse signal is used as a reference, frequency conversion is performed on a reference frequency to generate a spread spectrum code signal, and a spread spectrum signal is obtained according to the spread spectrum code signal and the binary signal, the second pulse signal may include a first frequency multiplier 5, a spread spectrum code generator 6, and a first multiplier 7, the first frequency multiplier 5 is used for receiving the reference frequency and generating a spread spectrum code rate, the spread spectrum code generator 6 is used for receiving the spread spectrum code rate and generating a spread spectrum code signal, the first multiplier 7 is used for receiving the spread spectrum code signal and performing multiplication operation on the spread spectrum code signal and the binary signal, and preferably, the spread spectrum code rate is an integral multiple of the reference frequency;
A subcarrier signal generation module: the second frequency multiplier 8 may be configured to receive the reference frequency transmitted by the spread spectrum signal generating module and generate a subcarrier rate, and the subcarrier generator 9 may be configured to receive the subcarrier rate and generate a sinusoidal subcarrier signal, where the subcarrier rate is preferably an integer multiple of the reference frequency;
A synthesized signal generation module: for generating an equivalent bandwidth composite signal from a spread spectrum signal and a subcarrier signal, a second multiplier 10 may be included, and the second multiplier 10 may be configured to receive the spread spectrum signal and the subcarrier signal, and perform a multiplication operation on the spread spectrum signal and the subcarrier signal to generate the equivalent bandwidth composite signal.
the modulation system of the bidirectional time ratio equivalent bandwidth synthesis signal is used for taking a high-frequency sine wave signal as a subcarrier signal used in the modulation process, and carrying out secondary modulation on the subcarrier signal and a spread spectrum signal with a modulated low frequency, so as to generate the equivalent bandwidth synthesis signal. The equivalent bandwidth synthesis signal comprises a signal spectrum and a main carrier frequency, the signal spectrum is divided into two parts which are respectively distributed on two sides of the main carrier frequency, and the structure of the equivalent bandwidth synthesis signal is mainly characterized in that the signal power is adjusted to the position of the two sides of the main carrier frequency, which is 1 time of the subcarrier bandwidth away from the center of the main carrier frequency, on one hand, the equivalent synthesis of synthesizing a large bandwidth signal by using two small bandwidth signals is realized, the signal using bandwidth is reduced, on the other hand, the signal improves the sharpness of a signal autocorrelation function compared with the traditional BPSK, and the time measurement precision is improved.
As shown in fig. 2 and 3, in the operation of the preferred embodiment, first, the reference frequency generator 1 of the reference frequency module sends out the reference frequency to provide the reference frequency for the measurement data generation module, the spread spectrum signal generation module and the second pulse generator 2, the second pulse generator 2 counts according to the reference frequency, when the count reaches the reference frequency, the second pulse generator 2 generates the second pulse signal, and the count is cleared and recounted, and when the reference frequency is reached again, the second pulse generator 2 generates the second pulse signal again, and the process is repeated to generate continuous second pulse signals.
A frequency divider 3 of the measurement data generation module receives a reference frequency transmitted by a reference frequency module, processes the reference frequency to obtain an information frame pulse control signal, and transmits the information frame pulse control signal to an information data generator 4, the information data generator 4 converts the satellite time ratio measured floating point type data into binary data according to the information frame pulse control signal, and performs error correction coding on the binary data in a Turbo error correction coding mode to obtain a binary signal, and transmits the binary signal to the spread spectrum signal generation module, and the generation of the binary signal is synchronously triggered by a second pulse signal.
a first frequency multiplier 5 of the spread spectrum signal generating module receives the reference frequency, multiplies the reference frequency to obtain a frequency corresponding to a spread spectrum code signal, that is, a spread spectrum code rate, where the spread spectrum code rate is an integral multiple of the reference frequency. The memory in the spreading code generator 6 stores a series of spreading code sequences of binary bits, the spreading code sequences are stored in a table form, a binary spreading code signal is generated by performing one-to-one lookup and reading on data in the table storing the spreading code sequences according to a beat by using the spreading code rate, the spreading code generator 6 transmits the spreading code signal to the first multiplier 7, the first multiplier 7 performs a binary multiplication operation on the binary signal and the binary spreading code signal to generate a spreading signal, and the spreading signal is transmitted to the synthesized signal generating module.
the second frequency multiplier 8 of the subcarrier signal generation module receives the reference frequency transmitted by the spreading module, and multiplies the frequency of the reference frequency to obtain a frequency corresponding to a subcarrier signal, i.e., a subcarrier rate, which is an integral multiple of the reference frequency. The subcarrier generator 9 of the subcarrier signal generating module includes a sine wave memory, the sine wave memory stores a sine wave with one period, the sine wave is stored in a form of a table, the generated frequency signals are used for searching and reading the data stored in the table one by one according to beats to generate subcarrier signals of the sine wave, and the generation of the subcarrier signals is synchronously triggered by pulse signals per second. The subcarrier generator 9 transmits the subcarrier signal to the composite signal generating module.
a second multiplier 10 in the synthesized signal generation module receives the spread spectrum signal and the subcarrier signal, and performs multiplication operation on the spread spectrum signal and the subcarrier signal to obtain an equivalent bandwidth synthesized signal. The equivalent bandwidth synthetic signal can improve the precision of satellite two-way time comparison, and the equivalent bandwidth synthetic signal is a signal with relatively larger bandwidth synthesized by two signals, but cannot cause the great increase of the bandwidth, so that the satellite two-way time comparison process is more convenient, and the use cost and the cost are also reduced.
On the other hand, the invention also discloses a method for modulating the satellite bidirectional comparison equivalent bandwidth synthetic signal by using the system, as shown in fig. 4, in a preferred embodiment, the method comprises the following steps:
s1: a reference frequency is generated and a pulse per second signal is generated based on the reference frequency. The reference frequency generator 1 of the reference frequency module sends out a reference frequency to provide a reference frequency for the measurement data generation module, the spread spectrum signal generation module and the second pulse generator 2, the second pulse generator 2 counts according to the reference frequency, when the count reaches the reference frequency, the second pulse generator 2 generates a second pulse signal, meanwhile, the count is cleared and counted again, when the count reaches the reference frequency again, the second pulse generator 2 generates a second pulse signal again, and the steps are repeated to generate continuous second pulse signals.
S2: and taking the pulse per second signal as a reference, converting the floating point type data measured by satellite time comparison into binary data, and carrying out error correction coding on the binary data to obtain a binary signal. The method comprises the steps that a frequency divider 3 of a measurement data generation module receives a reference frequency transmitted by a reference frequency module, the reference frequency is processed to obtain an information frame pulse control signal, the information frame pulse control signal is transmitted to an information data generator 4, the information data generator 4 converts floating point type data measured by satellite time comparison into binary data according to the information frame pulse control signal, error correction coding is carried out on the binary data in a Turbo error correction coding mode to obtain a binary signal, the binary signal is transmitted to a spread spectrum signal generation module, and the generation of the binary signal is synchronously triggered by a second pulse signal.
S3: and carrying out frequency multiplication on the reference frequency so as to generate a spread spectrum code signal by taking the pulse per second signal as a reference, and obtaining the spread spectrum signal according to the binary signal and the spread spectrum code signal. And receiving the reference frequency through a first frequency multiplier 5 of the spread spectrum signal generation module, and multiplying the reference frequency to obtain a frequency corresponding to a spread spectrum code signal, namely a spread spectrum code rate, wherein the spread spectrum code rate is an integral multiple of the reference frequency. The memory in the spreading code generator 6 stores a series of spreading code sequences of binary bits, the spreading code sequences are stored in a table form, a binary spreading code signal is generated by performing one-to-one lookup and reading on data in the table storing the spreading code sequences according to a beat by using the spreading code rate, the spreading code generator 6 transmits the spreading code signal to the first multiplier 7, the first multiplier 7 performs a binary multiplication operation on the binary signal and the binary spreading code signal to generate a spreading signal, and the spreading signal is transmitted to the synthesized signal generating module.
S4: and multiplying the reference frequency to generate a subcarrier signal by taking the pulse per second signal as a reference. And receiving the reference frequency transmitted by the spreading module through a second frequency multiplier 8 of the subcarrier signal generation module, and multiplying the reference frequency to obtain a frequency corresponding to a subcarrier signal, namely a subcarrier rate, wherein the subcarrier rate is an integral multiple of the reference frequency. The subcarrier generator 9 of the subcarrier signal generating module includes a sine wave memory, the sine wave memory stores a sine wave with one period, the sine wave is stored in a form of a table, the generated frequency signals are used for searching and reading the data stored in the table one by one according to beats to generate subcarrier signals of the sine wave, and the generation of the subcarrier signals is synchronously triggered by pulse signals per second. The subcarrier generator 9 transmits the subcarrier signal to the composite signal generating module.
S5: and obtaining an equivalent bandwidth synthesis signal according to the spread spectrum signal and the subcarrier signal. And receiving the spread spectrum signal and the subcarrier signal through a second multiplier 10 in a synthesized signal generation module, and performing multiplication operation on the spread spectrum signal and the subcarrier signal to obtain an equivalent bandwidth synthesized signal.
The equivalent bandwidth synthetic signal is a signal with relatively large bandwidth synthesized by two signals, so that the bandwidth is not greatly increased, the satellite two-way time comparison process is more convenient, and the use cost and the cost are also reduced.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. A system for modulating a composite signal of satellite time ratio versus equivalent bandwidth, comprising:
a reference frequency module: the second pulse generator is used for generating a reference frequency and generating a second pulse signal according to the reference frequency;
A measurement data generation module: the satellite time comparison and measurement floating point type data are converted into binary data by taking the pulse per second signal as a reference, and the binary data are subjected to error correction coding to obtain a binary signal;
A spread spectrum signal generation module: the spread spectrum signal generating module comprises a first frequency multiplier, a spread spectrum code generator and a first multiplier, the first frequency multiplier is used for receiving the reference frequency, generating a spread spectrum code rate and outputting the reference frequency to the subcarrier signal generating module, the spread spectrum code generator is used for receiving the spread spectrum code rate and generating a spread spectrum code signal, the first multiplier is used for receiving the spread spectrum code signal and multiplying the spread spectrum code signal and the binary signal to generate a spread spectrum signal;
A subcarrier signal generation module: the second pulse signal is used as a reference to generate a subcarrier signal;
a synthesized signal generation module: for generating an equivalent bandwidth synthesis signal from the spread spectrum signal and the subcarrier signal.
2. The system of claim 1, wherein the reference frequency module comprises a reference frequency generator and a pulse-per-second generator, the reference frequency generator is configured to provide a reference frequency for the measurement data generation module, the spread spectrum signal generation module, and the pulse-per-second generator is configured to receive the reference frequency and generate a pulse-per-second signal.
3. The system according to claim 1, wherein the measurement data generating module comprises a frequency divider and an information data generator, the frequency divider is configured to receive the reference frequency and process the reference frequency to obtain an information frame pulse control signal, and the information data generator is configured to convert the satellite time ratio measured floating point type data into binary data according to the information frame pulse control signal and perform error correction coding on the binary data to obtain a binary signal.
4. The system of claim 1, wherein the first frequency multiplier is configured to generate a spreading code rate having a frequency that is an integer multiple of the reference frequency.
5. the system of claim 1, wherein the subcarrier signal generating module comprises a second frequency multiplier and a subcarrier generator, the second frequency multiplier is configured to receive the reference frequency transmitted by the spread spectrum signal generating module and generate a subcarrier rate, and the subcarrier generator is configured to receive the subcarrier rate and generate a subcarrier signal with a sinusoidal waveform.
6. The system of claim 5, wherein the second frequency multiplier is configured to generate a subcarrier rate having a frequency that is an integer multiple of the reference frequency.
7. The system of claim 1, wherein the composite signal generating module comprises a second multiplier, and wherein the second multiplier is configured to receive the spread signal and the subcarrier signal, and multiply the spread signal and the subcarrier signal to generate the equivalent bandwidth composite signal.
8. The system of claim 1, wherein the composite signal generating module is configured to generate an equivalent bandwidth composite signal having a signal power located 1 subcarrier width around the carrier frequency.
9. a modulation method for satellite time ratio equivalent bandwidth synthesis signals is characterized by comprising the following steps:
S1: generating a reference frequency and generating a pulse per second signal according to the reference frequency;
S2: taking the pulse per second signal as a reference, converting floating point type data measured by satellite time comparison into binary data, and carrying out error correction coding on the binary data to obtain a binary signal;
S3: frequency multiplication is carried out on the reference frequency, so that a spread spectrum code signal is generated by taking the pulse per second signal as a reference, and the spread spectrum signal is obtained according to the binary signal and the spread spectrum code signal: receiving the reference frequency through a first frequency multiplier of a spread spectrum signal generation module, and performing frequency multiplication on the reference frequency to obtain a frequency corresponding to a spread spectrum code signal, namely a spread spectrum code rate, wherein the spread spectrum code rate is an integral multiple of the reference frequency, a memory in the spread spectrum code generator stores a series of spread spectrum code sequences with binary bits, the spread spectrum code sequences are stored in a table form, the spread spectrum code rate is used for performing one-to-one search and reading on data in the table for storing the spread spectrum code sequences according to beats to generate binary spread spectrum code signals, the spread spectrum code generator transmits the spread spectrum code signals to a first multiplier, and the first multiplier performs binary multiplication operation on the binary signals and the binary spread spectrum code signals to generate spread spectrum signals;
S4: frequency multiplication is carried out on the reference frequency, so that a subcarrier signal is generated by taking the pulse per second signal as a reference;
S5: and obtaining an equivalent bandwidth synthesis signal according to the spread spectrum signal and the subcarrier signal.
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| CN108111216A (en) * | 2017-12-11 | 2018-06-01 | 北京无线电计量测试研究所 | A kind of tracks of device for New System satellite two-way equivalent bandwidth composite signal |
| CN110471094B (en) * | 2019-07-17 | 2021-01-29 | 中国电子科技集团公司第五十四研究所 | Time comparison system and comparison method for digital real-time processing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0929949A1 (en) * | 1996-09-30 | 1999-07-21 | Qualcomm Incorporated | Method and apparatus for precorrecting timing and frequency in communication systems |
| CN103293534A (en) * | 2013-05-10 | 2013-09-11 | 西安空间无线电技术研究所 | Satellite navigation signal generation zero calibration method |
| CN103427842A (en) * | 2013-08-07 | 2013-12-04 | 上海交通大学 | Coding and decoding method and coding and decoding device for high-precision time transfer |
| CN104143997A (en) * | 2014-07-23 | 2014-11-12 | 西安空间无线电技术研究所 | Multi-access interference false locking resistance judgment method based on spread spectrum mechanism |
| CN104316938A (en) * | 2014-09-25 | 2015-01-28 | 上海欧科微航天科技有限公司 | Novel satellite simulator for low-earth-orbit satellite quasi-synchronous communication system |
-
2016
- 2016-09-27 CN CN201610856754.6A patent/CN106572045B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0929949A1 (en) * | 1996-09-30 | 1999-07-21 | Qualcomm Incorporated | Method and apparatus for precorrecting timing and frequency in communication systems |
| CN103293534A (en) * | 2013-05-10 | 2013-09-11 | 西安空间无线电技术研究所 | Satellite navigation signal generation zero calibration method |
| CN103427842A (en) * | 2013-08-07 | 2013-12-04 | 上海交通大学 | Coding and decoding method and coding and decoding device for high-precision time transfer |
| CN104143997A (en) * | 2014-07-23 | 2014-11-12 | 西安空间无线电技术研究所 | Multi-access interference false locking resistance judgment method based on spread spectrum mechanism |
| CN104316938A (en) * | 2014-09-25 | 2015-01-28 | 上海欧科微航天科技有限公司 | Novel satellite simulator for low-earth-orbit satellite quasi-synchronous communication system |
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