CN109274622A - Flight satellite carrier frequency compensation method - Google Patents

Flight satellite carrier frequency compensation method Download PDF

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Publication number
CN109274622A
CN109274622A CN201811172290.2A CN201811172290A CN109274622A CN 109274622 A CN109274622 A CN 109274622A CN 201811172290 A CN201811172290 A CN 201811172290A CN 109274622 A CN109274622 A CN 109274622A
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Prior art keywords
satellite
winged
carrier
frequency
calibrated
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CN201811172290.2A
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CN109274622B (en
Inventor
杨磊
宋新
赵勇
樊程广
陈小前
陈利虎
绳涛
白玉铸
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National University of Defense Technology
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National University of Defense Technology
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Publication of CN109274622A publication Critical patent/CN109274622A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H04L2027/0024—Carrier regulation at the receiver end
    • H04L2027/0026—Correction of carrier offset

Abstract

The invention provides a flying satellite carrier frequency compensation method which is used for reducing carrier frequency deviation among different flying satellites and improving reliability of space wireless networking. The method mainly corrects the carrier frequency of the flying satellite aiming at two factors of component difference and temperature drift, and firstly adjusts the carrier offset caused by component difference by adjusting a configuration register of a radio frequency module. Secondly, the temperature of the flying satellite is measured through a temperature sensor, and then the carrier frequency is kept stable through dynamically adjusting the parameters of the communication module. By the aid of the measures, stability and consistency of the download wave frequency of different flying satellites at different temperatures are guaranteed, and reliability of space networking is improved.

Description

Fly satellite carrier frequencies compensation method
Technical field
The present invention relates to frequency compensation methods when a kind of flight in-orbit suitable for winged satellite, for reducing different winged satellites Between carrier frequency offset, improve spacing wireless networking reliability.
Background technique
Winged satellite is the satellite system that quality is less than 0.1Kg, usually plate structure, integrates Star Service, communication, number on plate The subsystems such as pipe, payload, power supply.The application field for flying satellite includes space communication, navigation, science/exploration, telemetering sense Know, imaging, military surveillance etc. over the ground.
As the mankind explore the propulsion of space process, new application demand is continuously emerged, and is needing space multiple spot, same to pacing The application (such as a wide range of space radiates three-dimensional probe) of amount, needs space large number of, with collaborative work ability Measuring table, it is unbearable in cost using traditional large satellite.Due to relatively single on these space exploration task functions, make It can also be completed with small platform.Winged satellite is the ideal platform for completing such space application.Winged satellite generally uses in batch, uses The mode of dispensing makes it be scattered in the space environment for needing to detect, and constitutes a distributed collaboration measurement by wireless self-organization network System.
Wireless networking communications between star are the critical functions for flying satellite.Frequency stability is most important for wirelessly communicating. Carrier frequency shift will cause communication system performance decline or even cannot communicate.Frequency error source mainly includes that crystal oscillator device is poor The frequency shift (FS) that frequency departure, drift of crystal oscillator temperature caused by different, rf processing circuitry (such as frequency multiplier circuit) introduce.
To reduce cost, flies satellite and usually largely use COTS (Commercial off-the-shelf) device, differ greatly between device, to space Radiation protection ability is poor, is affected by temperature also more apparent, and different manufacturers even all exist with the product between producer's different batches Fine difference.Winged satellite is generally single plate structure, unshielded, is influenced by space environment more significant.
It is still in infancy for the research for flying satellite, from disclosed data, is successfully carried out at present in the world The winged satellite of stardust number that the only National University of Defense technology of rail flight and wireless networking test develops and emits, suitable for flying satellite Frequency compensation method is there is not yet disclosed maturation scheme.
Summary of the invention
In view of the defects existing in the prior art, the present invention provides a kind of winged satellite carrier frequencies compensation method.This method master The frequency of winged satellite is corrected for two factors of component variations and temperature drift, eliminate device difference itself and The carrier shift that temperature change is brought is innovative higher.
The technical solution adopted by the present invention is that:
Component and temperature difference can cause to fly satellite communication module carrier frequency shift, it is therefore desirable to carry out comprehensive tune It is whole.
A kind of winged satellite carrier frequencies compensation method, comprising the following steps:
(1) select to fly satellite S as the winged satellite of reference, in the in-orbit steady state operating temperature T of winged satellite0Under measure the reference and defend The carrier frequency value f of starcarrier_ref。
B) in the in-orbit steady state operating temperature T of winged satellite0The FREQ of winged its radio-frequency module of satellite to be calibrated is adjusted under (known), FREQ is to fly its radio-frequency module carrier frequency configuration register value of satellite, so that in T0At a temperature of, the carrier wave of winged satellite to be calibrated Frequency and reference fly the carrier frequency value f of satellitecarrier_refUnanimously.Method is as follows:
B1 the carrier frequency value f of winged its radio-frequency module of satellite to be calibrated) is measured with frequency spectrographcarrier_cal, then to be calibrated to fly The crystal oscillator frequency of satellite RF module is K is frequency division coefficient.
B2) by adjusting the FREQ of winged satellite RF module to be calibrated, so that the load of winged its radio-frequency module of satellite to be calibrated Wave frequency rate value and reference fly the carrier frequency value f of satellitecarrier_refUnanimously, adjustment formula is as follows:
(2) it is integrated with temperature sensor on winged satellite to be calibrated, the temperature of winged satellite can be measured, according to temperature The collected temperature information dynamic of degree sensor adjusts the FREQ value of winged satellite RF module to be calibrated, and then guarantees different temperatures Under the conditions of carrier frequency stability, the method is as follows:
A) measurement temperature is influenced caused by carrier frequency
Winged satellite to be calibrated is put into high-low temperature chamber, test temperature range [T is setlow, Thigh], in hot vacuum environment Under tested, obtain the carrier frequency value of winged its radio-frequency module of satellite in the case of different temperatures.
By TlowIt starts to warm up, every TstepDegree (general 5 degrees Celsius desirable), measures and records its radio-frequency module of winged satellite Carrier frequency value.It is fitted by data, obtains the carrier frequency variation with temperature curve for flying its radio-frequency module of satellite.
fcarrier_cal=F (T)
B) to fly the in-orbit steady state operating temperature T of satellite0Carrier frequency f when (known)cartier_t0On the basis of, carry out temperature Offset calibration makes the winged satellite to be calibrated under condition of different temperatures by adjusting the FREQ value of winged satellite RF module to be calibrated Carrier frequency and temperature T0Under carrier frequency fcartier_t0Unanimously.
C) according to step b), with fcarrier_t0On the basis of, winged satellite to be calibrated can be obtained by hot vacuum environment test The FREQ value that should be adjusted at different temperatures can get the temperature-FREQ value curve of winged satellite to be calibrated by data fitting. When winged satellite operation on orbit to be calibrated, with fcarrier_t0On the basis of, curve is worth according to the temperature-FREQ and carries out dynamic adjustment, is protected Demonstrate,prove the consistency for flying satellite carrier frequency at different temperatures.
Advantageous effects of the invention:
The present invention is first by adjusting the configuration register of radio-frequency module, to the carrier shift as caused by component difference It is adjusted.Secondly, carrying out temperature measurement to winged satellite by temperature sensor, and then communication module parameter is adjusted by dynamic So that carrier frequency keeps stablizing.By above-mentioned measure, using COTS device, reduce between different winged satellites Carrier frequency offset guarantees the stability and consistency of carrier frequency under different winged satellite different temperatures, improves space networking Reliability.
Specific embodiment
The present invention provides a kind of winged satellite carrier frequencies compensation method, mainly for component variations and temperature drift two because Element is corrected the frequency of winged satellite.
By taking No. three winged satellites are opened up in day as an example, it is plate structure that No. three winged satellites are opened up in day, integrate on plate Star Service, communication, number pipe, The subsystems such as payload, power supply.Winged satellite uses COTS device.For COTS crystal oscillator, frequency stability is generally 10ppm.Carrier frequency is about 100 times of crystal oscillator frequency, therefore frequency departure amplification factor is also about 100 times.Common crystals Precision is 10ppm, and for the crystal oscillator of 26M, frequency error maximum is up to 260hz, and corresponding carrier deviation maximum is up to 260K.It removes Except this rf processing circuitry (such as frequency multiplier circuit) also can pull-in frequency error, this error is also uncertain.In practical survey In examination, most of winged satellite carrier frequencies difference is in 100K or so.If do not corrected, transport packet error rate is higher, the networking time Extend.When carrier frequency differs by more than 150K, actual measurement is found substantially can not normal communication between winged satellite.
To overcome the carrier frequency offset flown between satellite as caused by component difference, the present invention uses adjustment radio frequency mould The configuration register of block is adjusted carrier frequency.Its carrier frequency and the relationship of crystal oscillator frequency are as follows:
Wherein fcarrierFor carrier frequency, foscFor crystal oscillator frequency, FREQ is to fly to defend The carrier frequency configuration register value of star radio-frequency module.
Embodiment 1:
A kind of winged satellite carrier frequencies compensation method, is adjusted the carrier shift as caused by component difference, The following steps are included:
A) it selects to fly satellite S as the winged satellite of reference, and measures the carrier frequency value f of the reference satellitecarrier_ref。
B) FREQ of winged its radio-frequency module of satellite to be calibrated is adjusted, FREQ is to fly the configuration of its radio-frequency module carrier frequency of satellite Register value, so that the carrier frequency of winged satellite to be calibrated and the carrier frequency value f with reference to winged satellitecarrier_refUnanimously.Method It is as follows:
B1 the carrier frequency value f of winged its radio-frequency module of satellite to be calibrated) is measured with frequency spectrographcarrier_cal, then to be calibrated to fly The crystal oscillator frequency of satellite RF module is
B2) by adjusting the FREQ of winged satellite RF module to be calibrated, so that the load of winged its radio-frequency module of satellite to be calibrated Wave frequency rate value and reference fly the carrier frequency value f of satellitecarrier_refUnanimously, adjustment formula is as follows:
Embodiment 2:
A kind of winged satellite carrier frequencies compensation method, is adjusted the carrier shift as caused by temperature difference, packet Include following steps:
It is integrated with temperature sensor on winged satellite to be calibrated, the temperature of winged satellite can be measured, according to temperature The collected temperature information dynamic of sensor adjusts the FREQ value of winged satellite RF module to be calibrated, and then guarantees different temperatures item The stability of carrier frequency under part, the method is as follows:
A) measurement temperature is influenced caused by carrier frequency
Winged satellite to be calibrated is put into high-low temperature chamber, test temperature range [T is setlow, Thigh], in hot vacuum environment Under tested, obtain the carrier frequency value of winged its radio-frequency module of satellite in the case of different temperatures.
By TlowIt starts to warm up, every TstepDegree (general 5 degrees Celsius desirable), measures and records its radio-frequency module of winged satellite Carrier frequency value.It is fitted by data, obtains the carrier frequency variation with temperature curve for flying its radio-frequency module of satellite.
fcarrier_cal=F (T)
B) to fly the in-orbit steady state operating temperature T of satellite0Carrier frequency f when (known)carrier_t0On the basis of, carry out temperature Offset calibration makes the winged satellite to be calibrated under condition of different temperatures by adjusting the FREQ value of winged satellite RF module to be calibrated Carrier frequency and T0When carrier frequency fcarrier_t0Unanimously.
Embodiment 3:
Component and temperature difference can cause to fly satellite communication module carrier frequency shift, it is therefore desirable to carry out comprehensive tune It is whole.
A kind of winged satellite carrier frequencies compensation method, comprising the following steps:
(1) select to fly satellite S as the winged satellite of reference, in the in-orbit steady state operating temperature T of winged satellite0Under measure the reference and defend The carrier frequency value f of starcarrier_tef。
B) in T0At a temperature of adjust the FREQ of winged its radio-frequency module of satellite to be calibrated, FREQ is to fly its radio-frequency module of satellite to carry Wave frequency rate configuration register value, so that in T0At a temperature of, the carrier frequency of winged satellite to be calibrated and the carrier frequency with reference to winged satellite Rate value fcarrier_refUnanimously.Method is as follows:
B1 the carrier frequency value f of winged its radio-frequency module of satellite to be calibrated) is measured with frequency spectrographcarrier_cal, then to be calibrated to fly The crystal oscillator frequency of satellite RF module is
B2) by adjusting the FREQ of winged satellite RF module to be calibrated, so that the load of winged its radio-frequency module of satellite to be calibrated Wave frequency rate value and reference fly the carrier frequency value f of satellitecarrier_refUnanimously, adjustment formula is as follows:
(2) it is integrated with temperature sensor on winged satellite to be calibrated, the temperature of winged satellite can be measured, according to temperature The collected temperature information dynamic of degree sensor adjusts the FREQ value of winged satellite RF module to be calibrated, and then guarantees different temperatures Under the conditions of carrier frequency stability, the method is as follows:
A) measurement temperature is influenced caused by carrier frequency
Winged satellite to be calibrated is put into high-low temperature chamber, test temperature range [T is setlow, Thigh], in hot vacuum environment Under tested, obtain the carrier frequency value of winged its radio-frequency module of satellite in the case of different temperatures.
By TlowIt starts to warm up, every TstepDegree (general 5 degrees Celsius desirable), measures and records its radio-frequency module of winged satellite Carrier frequency value.It is fitted by data, obtains the carrier frequency variation with temperature curve for flying its radio-frequency module of satellite.
fcarrier_cal=F (T)
B) to fly the in-orbit steady state operating temperature T of satellite0Carrier frequency f when (known)carrier_t0On the basis of, carry out temperature Offset calibration makes the winged satellite to be calibrated under condition of different temperatures by adjusting the FREQ value of winged satellite RF module to be calibrated Carrier frequency and temperature T0Under carrier frequency fcarrier_t0Unanimously.
C) according to step b), with fcarrier_t0On the basis of, winged satellite to be calibrated can be obtained by hot vacuum environment test The FREQ value that should be adjusted at different temperatures can get the temperature-FREQ value curve of winged satellite to be calibrated by data fitting. When winged satellite operation on orbit to be calibrated, with fcarrier_t0On the basis of, curve is worth according to the temperature-FREQ and carries out dynamic adjustment, is protected Demonstrate,prove the consistency for flying satellite carrier frequency at different temperatures.
The foregoing is merely a preferred embodiment of the present invention, are not intended to restrict the invention, for this field For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (5)

1. a kind of winged satellite carrier frequencies compensation method, it is characterised in that: the following steps are included:
(1) carrier shift as caused by component difference is adjusted
(a) select to fly satellite S as the winged satellite of reference, in the in-orbit steady state operating temperature T of winged satellite0Under measure the reference satellite Carrier frequency value fcarrier_ref；
(b) in the in-orbit steady state operating temperature T of winged satellite0The FREQ of lower adjustment winged its radio-frequency module of satellite to be calibrated, FREQ are to fly to defend Its radio-frequency module carrier frequency configuration register value of star, so that in T0At a temperature of, the carrier frequency and reference of winged satellite to be calibrated Fly the carrier frequency value f of satellitecarrier_refUnanimously；
(2) carrier shift as caused by temperature difference is adjusted
It is integrated with temperature sensor on winged satellite to be calibrated, the temperature of winged satellite can be measured, according to temperature sensing The collected temperature information dynamic of device adjusts the FREQ value of winged satellite RF module to be calibrated, and then guarantees under condition of different temperatures The stability of carrier frequency, the method is as follows:
A) measurement temperature is influenced caused by carrier frequency
Winged satellite to be calibrated is put into thermal vacuum tank, test temperature range [T is setlow, Thigh], it is carried out under hot vacuum environment Test, obtains the carrier frequency value of winged its radio-frequency module of satellite in the case of different temperatures；
By TlowIt starts to warm up, every TstepDegree, measures and records the carrier frequency value of winged its radio-frequency module of satellite；It is quasi- by data It closes, obtains the carrier frequency variation with temperature curve for flying its radio-frequency module of satellite；
fcarrier_cal=F (T)
B) to fly the in-orbit steady state operating temperature T of satellite0When carrier frequency fcarrier_t0On the basis of, temperature drift calibration is carried out, is led to Cross the FREQ value for adjusting winged satellite RF module to be calibrated, make the carrier frequency of the winged satellite to be calibrated under condition of different temperatures with Temperature T0Under carrier frequency fcarrier_t0Unanimously；
In above formula, K is frequency division coefficient.
C) according to step b), with fcarrier_t0On the basis of, winged satellite to be calibrated is obtained in different temperatures by hot vacuum environment test Under the FREQ value that should be adjusted, and then pass through data fitting and obtain the temperature-FREQ of winged satellite to be calibrated and be worth curve；It is to be calibrated to fly When satellite operation on orbit, with fcarrier_t0On the basis of, curve is worth according to the temperature-FREQ and carries out dynamic adjustment, guarantees that this flies to defend The consistency of star carrier frequency at different temperatures.
2. winged satellite carrier frequencies compensation method according to claim 1, it is characterised in that: the b in step (1)) it is adopted Method is:
B1 the carrier frequency value f of winged its radio-frequency module of satellite to be calibrated) is measured with frequency spectrographcarrier_cal, then winged satellite to be calibrated The crystal oscillator frequency of radio-frequency module is
B2) by adjusting the FREQ of winged satellite RF module to be calibrated, so that the carrier frequency of winged its radio-frequency module of satellite to be calibrated Rate value and reference fly the carrier frequency value f of satellitecarrier_refUnanimously, adjustment formula is as follows:
3. a kind of winged satellite carrier frequencies compensation method, it is characterised in that: this method is to the carrier wave as caused by component difference Offset is adjusted, comprising the following steps:
A) it selects to fly satellite S as the winged satellite of reference, and measures the carrier frequency value f of the reference satellitecarrier_ref；
B) FREQ of winged its radio-frequency module of satellite to be calibrated is adjusted, FREQ is to fly the configuration deposit of its radio-frequency module carrier frequency of satellite Device value, so that the carrier frequency of winged satellite to be calibrated and the carrier frequency value f with reference to winged satellitecarrier_refUnanimously.
4. winged satellite carrier frequencies compensation method according to claim 3, it is characterised in that: side used by step (b) Method is:
B1 the carrier frequency value f of winged its radio-frequency module of satellite to be calibrated) is measured with frequency spectrographcarrier_cal, then winged satellite to be calibrated The crystal oscillator frequency of radio-frequency module is
B2) by adjusting the FREQ of winged satellite RF module to be calibrated, so that the carrier frequency of winged its radio-frequency module of satellite to be calibrated Rate value and reference fly the carrier frequency value f of satellitecarrier_refUnanimously, adjustment formula is as follows:
5. a kind of winged satellite carrier frequencies compensation method, which is characterized in that this method is inclined to the carrier wave as caused by temperature difference Shifting is adjusted, comprising the following steps:
It is integrated with temperature sensor on winged satellite to be calibrated, the temperature of winged satellite can be measured, according to temperature sensing The collected temperature information dynamic of device adjusts the FREQ value of winged satellite RF module to be calibrated, and then guarantees under condition of different temperatures The stability of carrier frequency, the method is as follows:
A) measurement temperature is influenced caused by carrier frequency
Winged satellite to be calibrated is put into thermal vacuum tank, test temperature range [T is setlow, Thigh], it is carried out under hot vacuum environment Test, obtains the carrier frequency value of winged its radio-frequency module of satellite in the case of different temperatures；
By TlowIt starts to warm up, every TstepDegree, measures and records the carrier frequency value of winged its radio-frequency module of satellite.It is quasi- by data It closes, obtains the carrier frequency variation with temperature curve for flying its radio-frequency module of satellite；
fcarrier_cal=F (T)
B) to fly the in-orbit steady state operating temperature T of satellite0When carrier frequency fcarrier_t0On the basis of, temperature drift calibration is carried out, is led to Cross the FREQ value for adjusting winged satellite RF module to be calibrated, make the carrier frequency of the winged satellite to be calibrated under condition of different temperatures with T0When carrier frequency fcarrier_t0Unanimously；
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN106330296A (en) * 2016-08-31 2017-01-11 无锡市电子仪表工业有限公司 Method for calibrating, compensating and self-correcting parameters of optical module
CN107144860A (en) * 2017-04-20 2017-09-08 上海北伽导航科技有限公司 A kind of frequency drift and time determine method and GNSS receiver
CN107450578A (en) * 2017-07-26 2017-12-08 中国人民解放军空军工程大学 A kind of satellite group rail design method around the flight of geo-synchronous orbit satellite distribution common rail

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Title
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