CN109100756B - Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder - Google Patents

Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder Download PDF

Info

Publication number
CN109100756B
CN109100756B CN201810919248.6A CN201810919248A CN109100756B CN 109100756 B CN109100756 B CN 109100756B CN 201810919248 A CN201810919248 A CN 201810919248A CN 109100756 B CN109100756 B CN 109100756B
Authority
CN
China
Prior art keywords
spread spectrum
satellite
agc
transponders
rho
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.)
Active
Application number
CN201810919248.6A
Other languages
Chinese (zh)
Other versions
CN109100756A (en
Inventor
刘洋
王晓晨
张芸香
田华东
戴雪扬
谭博能
丁洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHINA GREAT WALL INDUSTRY CORP
Beijing Institute of Spacecraft System Engineering
Original Assignee
CHINA GREAT WALL INDUSTRY CORP
Beijing Institute of Spacecraft System Engineering
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHINA GREAT WALL INDUSTRY CORP, Beijing Institute of Spacecraft System Engineering filed Critical CHINA GREAT WALL INDUSTRY CORP
Priority to CN201810919248.6A priority Critical patent/CN109100756B/en
Publication of CN109100756A publication Critical patent/CN109100756A/en
Application granted granted Critical
Publication of CN109100756B publication Critical patent/CN109100756B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/23—Testing, monitoring, correcting or calibrating of receiver elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The invention discloses a method and a module for discovering and evaluating performance change of an on-orbit satellite spread spectrum transponder, which can discover the performance change situation of the on-orbit satellite spread spectrum transponderAnd performing a piecewise assessment of severity. The method comprises the steps of extracting historical AGC level telemetering data of two spread spectrum answering machines of each satellite aiming at a plurality of satellites which meet the requirement that 'two on-orbit satellites with the same spread spectrum system answering machines are equipped and two spread spectrum answering machine receivers are both started to work'; calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; constructing an evaluation threshold value by using the correlation coefficients of all satellites meeting the condition; for an on-orbit satellite i to be evaluated, determining a correlation coefficient rho of AGC level telemetering data of two spread spectrum transponders of the satellite iiAnd comparing with the evaluation threshold value to obtain an evaluation result.

Description

Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder
Technical Field
The invention relates to the technical field of performance evaluation of spread spectrum transponders, in particular to a method and a module for discovering and evaluating performance change of an on-orbit satellite spread spectrum transponder.
Background
At present, most of the in-orbit satellite measurement and control systems in China adopt S-band spread spectrum transponders, the spread spectrum transponders are important equipment for uplink and downlink communication between a satellite and the ground, and the success or failure of the uplink and downlink of the satellite and the in-orbit service life of the satellite are directly determined by whether the spread spectrum transponders work normally or not. The use of the satellite on-orbit stage spread spectrum transponder is only embodied in a tracking arc segment and comprises the functions of uplink instruction injection, downlink telemetry receiving, ranging and the like.
AGC level telemetry is an important parameter that reflects the operational status of the transponder uplink function. Because the change of the AGC level depends on whether the AGC level is in the tracking arc segment and whether uplink operation exists, the AGC level of the spread spectrum transponder cannot be subjected to conventional long-time trend analysis, that is, the on-track performance and state of the spread spectrum transponder cannot be evaluated through intuitive trend change. Meanwhile, the AGC level is influenced by various external factors such as the change of ground emission signals and signal propagation attenuation, and shows an irregular fluctuation trend in the uplink process, and the current on-track state/performance cannot be automatically monitored and evaluated by an effective means. In summary, during the on-track operation of the spread spectrum transponder, the remote measurement of the state quantity such as the "lock state parameter" can only monitor the current operating state of the spread spectrum transponder, but cannot intuitively reflect the on-track performance change condition of the transponder.
The on-orbit management work of the spread spectrum transponder is mainly carried out by the on-orbit satellite at present through the following means: (1) monitoring whether the uplink task is normally executed or whether the carrier and bit locking state parameters are normally locked or not in the measurement and control arc section; (2) monitoring whether normal receiving (whether telemetry data is interrupted) can be carried out through downlink telemetry; (3) if necessary, the post analysis can be carried out by measuring and controlling whether the AGC level in the arc section is correspondingly increased along with the loading of the uplink task. The reasons that may cause the above operating condition of the spread spectrum transponder to be abnormal are in several respects: (1) the tracking states, such as satellite elevation angle and ground equipment state, are usually represented by two transponders working abnormally at the same time. (2) The base band fault caused by the space environment is usually represented by an uplink/downlink exception of one transponder, and the fault can be solved by means of base band resetting and the like.
The working state of the responder can be obtained only by the means, and further the abnormity of the working state can be found in real time. However, it is not appropriate for electronic devices such as spread spectrum transponders to evaluate the performance of the transponder in abnormal situations. Therefore, there is a need to find a method to discover and evaluate the long-term on-track performance variation of spread spectrum transponders via on-track telemetry data.
Disclosure of Invention
In view of this, the invention provides a method for discovering and evaluating performance change of an on-orbit satellite spread spectrum transponder and an implementation module, which can discover performance change of the on-orbit satellite spread spectrum transponder and further implement evaluation.
In order to solve the above-mentioned technical problems, the present invention has been accomplished as described above.
A method for discovering and evaluating the performance variation of the on-orbit satellite spread spectrum transponder includes
Aiming at a plurality of satellites which meet the requirement that the on-orbit satellite is provided with two transponders with the same spread spectrum system and the receivers of the two spread spectrum transponders are both started to work, historical Automatic Gain Control (AGC) level telemetering data of the two spread spectrum transponders of each satellite are extracted;
calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; constructing an evaluation threshold value by using the correlation coefficients of all satellites meeting the condition;
for an on-orbit satellite i to be evaluated, determining a correlation coefficient rho of AGC level telemetering data of two spread spectrum transponders of the satellite i in a period to be evaluatediAnd comparing with the evaluation threshold value to obtain an evaluation result.
Preferably, the constructing of the evaluation threshold by using the correlation coefficients of all satellites satisfying the condition is as follows:
calculating a mean value E (rho) and a standard deviation sigma by using the correlation coefficients of all satellites meeting the condition, and constructing an evaluation threshold rho_MINE (ρ) -3 σ and ρ_MAX＝E(ρ)-2σ。
Preferably, the comparison with the evaluation threshold value obtains the evaluation result as:
for an on-orbit satellite i to be evaluated, determining a correlation coefficient rho of AGC level telemetering data of two spread spectrum transponders of the satellite ii(ii) a If ρiLess than rho_MINDetermining that the receiver of at least one of the two spread spectrum answering machines has serious performance reduction or failure; if ρiAt rho_MINAnd ρ_MAXAnd then determining that there is a performance degradation in the receiver of at least one of the two spread spectrum transponders.
Preferably, the acquisition of Automatic Gain Control (AGC) level telemetry data for each spread spectrum transponder is by: AGC level telemetry data for a full life cycle is extracted.
Preferably, the acquisition of Automatic Gain Control (AGC) level telemetry data for each spread spectrum transponder is by: AGC level telemetry data is periodically extracted for a portion of the time period.
The invention also provides a module for discovering and evaluating the performance change of the on-orbit satellite spread spectrum transponder, which comprises:
a threshold value storage module for storing an evaluation threshold value ρ_MINAnd ρ_MAX(ii) a The obtaining mode of the evaluation threshold value is as follows: aiming at a plurality of satellites which meet the requirement that the on-orbit satellite is provided with two transponders with the same spread spectrum system, and receivers of the two spread spectrum transponders are both started to work, historical AGC level telemetering data of the two spread spectrum transponders of each satellite are extracted; calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; constructing an evaluation threshold value by using the correlation coefficients of all satellites meeting the condition;
the data acquisition module is used for acquiring AGC level telemetering data of two spread spectrum answering machines of the satellite i in a period to be evaluated from the satellite i to be evaluated;
a correlation coefficient calculation module for calculating a correlation coefficient rho by using the AGC level telemetering data acquired by the data acquisition modulei；
An evaluation module for evaluating the correlation coefficient ρiAnd comparing with the evaluation threshold value to obtain an evaluation result.
Preferably, the threshold value constructed by the threshold value storage module is: rho_MINE (ρ) -3 σ and ρ_MAXE (ρ) -2 σ; where E (ρ) and σ are the mean E (ρ) and standard deviation σ calculated using the correlation coefficients of all satellites satisfying the condition, respectively.
Preferably, the evaluation module evaluates in the following manner: if ρiLess than the evaluation threshold value rho constructed by the evaluation threshold value construction module_MINDetermining that the receiver of at least one of the two spread spectrum answering machines has serious performance reduction or failure; if ρiAt rho_MINAnd ρ_MAXAnd then determining that there is a performance degradation in the receiver of at least one of the two spread spectrum transponders.
Has the advantages that:
(1) the invention provides a fully simplified double-spread-spectrum transponder AGC level correlation coefficient model for solving the contradiction between the monitoring requirement of the remote measurement change rule of the AGC of a single spread-spectrum transponder and the difficulty in constructing an accurate mathematical model. The principle on which this scheme is based is: the AGC level telemetering data of the two same-body spread spectrum answering machines which are backups for each other are the same under the normal condition, and the difference degree can reflect whether the performances of the two spread spectrum answering machines generate deviation or not. Therefore, the correlation coefficients of AGC levels of the two spread spectrum answering machines are used as representations to discover the performance change of the spread spectrum answering machines, and further, the evaluation is realized.
(2) The method utilizes a statistical theory and a 3 sigma criterion to construct two levels of 'performance abnormity' evaluation threshold values, so that the performance change of the on-orbit satellite spread spectrum transponder receiver can be visually evaluated, and the blank that the performance evaluation of the existing on-orbit satellite spread spectrum transponder cannot be visually found in real time is filled.
(3) The research result of the invention is based on the real in-orbit telemetry data of the satellite, and compared with data fitting, physical simulation, test and the like, the in-orbit telemetry data of the satellite can more truly reflect the change condition of the in-orbit state of the satellite.
(4) The method adopts a correlation coefficient method, is simple and efficient, has moderate logic complexity and moderate calculated amount, and is convenient for engineering realization.
(5) The obtained result can be used for the research of performance analysis and early warning of a spacecraft spread spectrum transponder receiver, and is suitable for on-orbit management performance evaluation work; the method can be further applied to on-orbit monitoring work, performance analysis, early warning research and the like of the measurement and control transponder in the satellite service life-exceeding period.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a graph of the correlation coefficient of the in-orbit satellite spread spectrum transponder AGC;
FIG. 3 is a diagram of the AGC variation of a spread spectrum transponder A, B of a satellite S1;
FIG. 4 is a diagram of the AGC variation of the spread spectrum transponder A, B of the satellite S2;
fig. 5 is a variation curve of AGC of a spread spectrum transponder A, B of satellite S3.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a method for discovering and evaluating the performance change of an on-orbit satellite spread spectrum transponder aiming at the problem that the performance reduction of the on-orbit satellite spread spectrum transponder receiver cannot be timely and visually discovered, and has important significance for timely discovering and processing the fault or the performance reduction of the on-orbit satellite spread spectrum transponder receiver.
The parameters capable of reflecting the state of the spread spectrum transponder are very few, and the AGC (automatic gain control) level is one of the parameters, and can directly and comprehensively represent whether the transponder receiver works normally or not in real time. Whether the problem of low noise amplification, the problem of a frequency mixing intermediate amplification circuit, a local oscillator circuit or the problem of an AGC circuit exists, the direct expression of the problems can be that uplink locking is unstable or is unlocked, and finally the problems can be represented by an AGC level.
The present invention contemplates the use of this AGC level for the discovery and evaluation of spread spectrum transponder performance variations. But this is not done with the AGC data of one spread-spectrum transponder alone. There are several problems in its engineering implementation:
1) the AGC level is related to the uplink loading condition, and its characteristic is: when the satellite is in the measurement and control arc section and has uplink loading, the AGC level is usually about 2.5V, and when the satellite has no uplink loading, the AGC is kept at the level of no uplink signal, usually about 0.8V. Therefore, if the on-track monitoring range is selected to be as wide as 0.8-2.5V, the AGC level abnormity is difficult to automatically find.
2) Intuitive trend interpretation of AGC levels is also difficult. (a) When each tracking circle analyzes the trend of the AGC level of a single responder in real time according to the task uplink condition, the real-time interpretation cannot be finished manually in the situation of hundreds of on-orbit satellites; (b) when the trend is analyzed for long-term data of more than one week, the trend cannot be intuitively interpreted, so that the failure or performance degradation of the transponder receiver at an early stage is not facilitated.
Therefore, a simple and efficient evaluation method with moderate logic complexity is needed, which is convenient for engineering implementation. In the scheme provided by the invention, because the AGC level telemetering data of the two same-system spread spectrum answering machines which are backups for each other are the same under the normal condition, the difference and the difference degree can reflect whether the performances of the two spread spectrum answering machines generate the deviation or not. Therefore, the correlation coefficients of AGC levels of the two spread spectrum answering machines are used as the representation to discover and even evaluate the performance change of the spread spectrum answering machines, and the requirements of moderate logic complexity, simplicity, high efficiency and convenience for engineering realization can be completely met.
The process of the method for discovering and evaluating the performance change of the on-orbit satellite spread spectrum transponder is shown in figure 1, and the specific process comprises the following steps:
step one, determining a plurality of on-orbit satellite models meeting the conditions and acquiring AGC on-orbit telemetry data.
In order to meet the requirement of hot standby of an uplink channel of an on-orbit satellite, the receiving channels of the measurement and control transponder ensure double-computer hot standby, and the working modes of the measurement and control transponder are different due to different designs of measurement and control systems of high and low orbit satellites. The invention has the following applicable conditions: it is necessary to consider that the satellite is equipped with two transponders of the same spread spectrum system and that the receivers of both the two spread spectrum transponders are powered on.
The data for each satellite may be used to obtain a correlation coefficient in subsequent steps, and the correlation coefficients for multiple satellites are used to construct the threshold. The greater the number of satellites, the more accurate the threshold is constructed. It is therefore optimal to find all satellites that satisfy the condition.
In the preferred embodiment, all satellite models satisfying the requirement that the on-orbit satellite provided with two transponders with the same spread spectrum system is provided and the receivers of the two spread spectrum transponders are both started up are determined, and AGC level telemetering data of each spread spectrum transponder for a period of time are obtained. The period of time may be full-life cycle AGC on-track telemetry data, or may be periodically acquired for a partial period of time, so as to complete and update the acquired threshold.
Step two, establishing a correlation coefficient model
Considering that a satellite is provided with two spread spectrum transponders with the same state, and the interference factors suffered by the two spread spectrum transponders when receiving terrestrial uplink signals are basically the same, the AGC telemetry of the two spread spectrum transponders A, B is analyzed by a statistical method at the same moment, the performance change condition of the transponder receiver is evaluated, if the change trends of the two spread spectrum transponders are greatly different, the performance change of at least one transponder receiver is indicated, and a correlation coefficient model is established as follows:
Figure GDA0002566703980000071
wherein, VA(t) AGC level telemetry data for the spread spectrum transponder a at time t;
VB(t) AGC level telemetry data of spread spectrum transponder B at time t;
Cov(VA(t),VB(t)) represents the covariance of two random sequences of AGC level telemetry data for set a and AGC level telemetry data for set B over a period of time;
σ(VA(t))、σ(VB(t)) respectively representing the standard deviation of two random sequences consisting of AGC level telemetry data of the A machine and AGC level telemetry data of the B machine in a period of time;
ρ represents the correlation coefficient between the AGC level telemetry data of the spread spectrum transponder a and the AGC level telemetry data of the spread spectrum transponder B in one satellite.
(3) And establishing an evaluation criterion threshold.
And performing correlation coefficient calculation on AGC level telemetric data of all on-orbit spread spectrum transponder A, B machines meeting the conditions through historical telemetric data to obtain a group of random number sequences of correlation coefficients: rho1、ρ2、……、ρm… …, m is the serial number of the satellite. The average value of the sequence is obtained as E (rho)) The standard deviation is σ, and the following evaluation method is proposed with reference to "3 σ criterion":
by X ═ ρm-E (ρ) | characterizes the degree of coefficient deviation, ρmWhen the value is larger than E (rho), the correlation is strong, and the performance is better; so only p needs to be consideredmIf the value is less than E (ρ), the performance of the receiver of the transponder decreases, i.e., X is equal to E (ρ) - ρmThe following evaluation thresholds were established:
ρ_MIN＝E(ρ)-3σ
ρ_MAX＝E(ρ)-2σ
(4) on-track evaluation
Determining a correlation coefficient rho of AGC level telemetering data of two spread spectrum answering machines of a satellite in a period to be evaluated aiming at the satellite i to be evaluatedi。
And conclusion one: AGC correlation coefficient rho of spread spectrum transponder A, B when satellite i is usediSatisfy rhoi<ρ_MINWhen the satellite spread spectrum transponder A, B is detected to be in a state of serious performance degradation or failure;
and a second conclusion: AGC correlation coefficient rho of spread spectrum transponder A, B when satellite i is usediSatisfy rho_MIN<ρi<ρ_MAXThe receiver of at least one of the satellite spread spectrum transponders A, B is considered to have degraded performance.
Example verification:
the first conclusion of the method is further explained by taking the performance reduction of a certain spread spectrum transponder of a certain satellite S1 as an example and the second conclusion of the method is further explained by taking the performance reduction of a certain series of satellites S2 and S3 as an example by combining the actual AGC level telemetering data of the current on-orbit spread spectrum transponder.
First, on-orbit actual threshold determination
At present, 39 satellites are in total, which meet the applicable conditions of the present invention, correlation coefficients are calculated for A, B spread spectrum transponders of 39 satellites for AGC telemetry, see fig. 2, the mean value E (ρ) of the sequence of correlation coefficients is 0.92, the standard deviation σ is 0.0667, 3 σ is 0.2, and 2 σ is 0.1334.
The following evaluation thresholds were established:
ρ_MIN＝E(ρ)-3σ＝0.7199
ρ_MAX＝E(ρ)-2σ＝0.7866
after the on-track actual threshold is determined, two conclusion data are determined:
and conclusion one: rhoi<0.7199, indicating a severe degradation or failure of the receiver of at least one of the transponders A, B;
and a second conclusion: 0.7199<ρi<0.7866, there is a performance degradation in the receiver of at least one of the spread spectrum transponders A, B.
Secondly, using the satellite S1 as a verification example to verify the conclusion one:
fig. 3 is an AGC variation curve of a spread spectrum transponder A, B of a satellite S1, and a correlation coefficient of the satellite S1 is compared with a threshold value to obtain:
ρS1＝0.648951<ρ_MIN
the practical situation is as follows: the receiver of the satellite spread spectrum transponder B fails in 12 months in 2015, the abnormal phenomenon is 'the AGC value of the receiver B is unchanged and the uplink is unlocked', see figure 3, the subsequent abnormal phenomenon appears for multiple times and accords with rhoS1<ρ_MINThe conclusion of the evaluation that the receiver of at least one of the satellite spread spectrum transponders A, B has a severe degradation or failure "is in fact consistent.
Thirdly, using S2 and S3 as verification examples to verify the conclusion two:
1) satellite S2:
ρ_MIN<ρS2＝0.762201<ρ_MAX
2) satellite S3:
ρ_MIN<ρS3＝0.766149<ρ_MAX
it can be seen from fig. 4 and 5 that the AGC telemetry of the S2 and S3 satellite spread spectrum transponder B receiver is low and has a wide fluctuation range, but can still be used normally most of the time, which meets the evaluation conclusion of "performance degradation of the receiver of at least one transponder in the satellite spread spectrum transponder A, B".
The method can realize real-time, automatic and accurate monitoring in the orbit process, strives for precious time for the use strategy formulation, abnormal advance discovery and emergency treatment of the responder receiver, and provides reliable guarantee for the long-term on-orbit stable operation of the satellite.
The method may form a software module, which is deployed where needed. The invention also provides a module for discovering and evaluating the performance change of the on-orbit satellite spread spectrum transponder, which comprises a data acquisition module, a correlation coefficient calculation module, a threshold storage module and an evaluation module.
A threshold value storage module for storing an evaluation threshold value ρ_MINAnd ρ_MAX(ii) a The obtaining mode of the evaluation threshold value is as follows: aiming at a plurality of satellites which meet the requirement that the on-orbit satellite is provided with two transponders with the same spread spectrum system and the receivers of the two spread spectrum transponders are both started to work, historical Automatic Gain Control (AGC) level telemetering data of the two spread spectrum transponders of each satellite are extracted; calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; calculating a mean value E (rho) and a standard deviation sigma by using correlation coefficients of all satellites to construct an evaluation threshold value rho_MINE (ρ) -3 σ and ρ_MAX＝E(ρ)-2σ；
The data acquisition module is used for acquiring AGC level telemetering data of two spread spectrum answering machines of the satellite i to be evaluated;
a correlation coefficient calculation module for calculating a correlation coefficient rho by using the AGC level telemetering data acquired by the data acquisition modulei；
An evaluation module for evaluating the correlation coefficient ρiCompared with the evaluation threshold if piLess than the evaluation threshold value rho constructed by the evaluation threshold value construction module_MINDetermining that the receiver of at least one of the two spread spectrum answering machines has serious performance reduction or failure; if ρiAt rho_MINAnd ρ_MAXAnd then determining that there is a performance degradation in the receiver of at least one of the two spread spectrum transponders.
The embodiment adopts a statistical mode to establish the evaluation threshold value, so that the statistical result is more accurate, the natural law is met, the algorithm is simple, and the method is realized based on engineering. However, in practice, the evaluation threshold may be constructed by using a simpler or more complex model based on the correlation coefficient, for example, the evaluation threshold is obtained by means of an average method, or the evaluation result is obtained by means of a weighted average method.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A method for discovering and evaluating the performance change of an on-orbit satellite spread spectrum transponder is characterized in that,
aiming at a plurality of satellites which meet the requirement that the on-orbit satellite is provided with two transponders with the same spread spectrum system and the receivers of the two spread spectrum transponders are both started to work, historical Automatic Gain Control (AGC) level telemetering data of the two spread spectrum transponders of each satellite are extracted;
calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; calculating a mean value E (rho) and a standard deviation sigma by using the correlation coefficients of all satellites meeting the condition, and constructing an evaluation threshold rho_MINE (ρ) -3 σ and ρ_MAX＝E(ρ)-2σ；
For a satellite i to be evaluated, determining a correlation coefficient rho of AGC level telemetering data of two spread spectrum transponders of the satellite i in a period to be evaluatediAnd comparing with an evaluation threshold value to obtain an evaluation result: if ρiLess than rho_MINDetermining that the receiver of at least one of the two spread spectrum answering machines has serious performance reduction or failure; if ρiAt rho_MINAnd ρ_MAXAnd then determining that there is a performance degradation in the receiver of at least one of the two spread spectrum transponders.
2. The method of claim 1 wherein the Automatic Gain Control (AGC) level telemetry data for each spread spectrum transponder is obtained by: AGC level telemetry data for a full life cycle is extracted.
3. The method of claim 1 wherein the Automatic Gain Control (AGC) level telemetry data for each spread spectrum transponder is obtained by: AGC level telemetry data is periodically extracted for a portion of the time period.
4. A module for discovering and evaluating changes in performance of an on-orbit satellite spread spectrum transponder, comprising:
a threshold value storage module for storing an evaluation threshold value ρ_MINAnd ρ_MAX(ii) a The obtaining mode of the evaluation threshold value is as follows: aiming at a plurality of satellites which meet the requirement that the on-orbit satellite is provided with two transponders with the same spread spectrum system and the receivers of the two spread spectrum transponders are both started to work, historical Automatic Gain Control (AGC) level telemetering data of the two spread spectrum transponders of each satellite are extracted; calculating correlation coefficients of the two groups of AGC level telemetering data of each satellite to obtain a correlation coefficient; calculating a mean value E (rho) and a standard deviation sigma by using the correlation coefficients of all satellites meeting the condition, and constructing an evaluation threshold rho_MINE (ρ) -3 σ and ρ_MAX＝E(ρ)-2σ；
The data acquisition module is used for acquiring AGC level telemetering data of two spread spectrum answering machines of the satellite i in a period to be evaluated from the satellite i to be evaluated;
a correlation coefficient calculation module for calculating a correlation coefficient rho by using the AGC level telemetering data acquired by the data acquisition modulei；
An evaluation module for evaluating the correlation coefficient ρiAnd comparing with an evaluation threshold value to obtain an evaluation result: if ρiLess than rho_MINDetermining that the receiver of at least one of the two spread spectrum answering machines has serious performance reduction or failure; if ρiAt rho_MINAnd ρ_MAXAnd then determining that there is a performance degradation in the receiver of at least one of the two spread spectrum transponders.
CN201810919248.6A 2018-08-14 2018-08-14 Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder Active CN109100756B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810919248.6A CN109100756B (en) 2018-08-14 2018-08-14 Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810919248.6A CN109100756B (en) 2018-08-14 2018-08-14 Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder

Publications (2)

Publication Number Publication Date
CN109100756A CN109100756A (en) 2018-12-28
CN109100756B true CN109100756B (en) 2020-10-30

Family

ID=64849737

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810919248.6A Active CN109100756B (en) 2018-08-14 2018-08-14 Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder

Country Status (1)

Country Link
CN (1) CN109100756B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143331A (en) * 1977-12-16 1979-03-06 National Semiconductor Corporation Summing amplifier for developing a squelch and meter voltage in a radio receiver
US5535238A (en) * 1990-11-16 1996-07-09 Interdigital Technology Corporation Spread spectrum adaptive power control communications system and method
CN101082664B (en) * 2007-07-03 2011-09-28 浙江大学 Devices and methods for fast catching signal in high dynamic satellite navigation receiving machine
CN103869732B (en) * 2014-02-27 2016-08-17 航天东方红卫星有限公司 A kind of AGC value is utilized to realize the method that separate unit TT&C Transponder the most independently recovers

Also Published As

Publication number Publication date
CN109100756A (en) 2018-12-28

Similar Documents

Publication Publication Date Title
US8369812B2 (en) Method and system for detection of passive intermodulation interference emissions
CN108153321B (en) Method and device for resisting electromagnetic radiation interference of information link of unmanned aerial vehicle
US9162777B2 (en) Apparatus and method for monitoring status of satellite
US8654722B2 (en) Efficient channel search with sequential probability ratio testing
US10371740B2 (en) Power system disturbance localization using recurrence quantification analysis and minimum-volume-enclosing ellipsoid
CN112379655B (en) Satellite on-orbit autonomous management method based on satellite-borne log system
US8473790B2 (en) Method for correcting prediction errors of signal values with time variation subjected to interference by various uncontrollable systematic effects
WO2021160749A1 (en) Forest fire early detection method and forest fire early detection system
CN109100756B (en) Method and module for discovering and evaluating performance change of on-orbit satellite spread spectrum transponder
Calcagno et al. An interference detection algorithm for COTS GNSS receivers
Fernández et al. Telemetry anomaly detection system using machine learning to streamline mission operations
Burch A Method for Calculation of the Resilience of a Space System
US7483501B1 (en) System and method for radio receiver RF background noise estimation
CN110572202B (en) Single-satellite and multi-satellite combined hybrid spectrum sensing method driven by sensing performance
CN115314138B (en) Satellite remote control command issuing method and related equipment
Srinivasan Distributed detection with decision feedback
US6232909B1 (en) Communication network optimization tool
Gao et al. Research on architecture of condition monitoring and health management of active electronically scanned array radar
CN105320014B (en) FPGA space application radiation hardening methods based on inspection self-healing
Marini-Pereira et al. A simple and effective approach to real-time ionospheric monitoring for GBAS in low latitudes
CN115714731B (en) Deep space measurement and control link abnormality detection method based on deep learning self-encoder
Tominaga et al. Comparing satellite telemetry against simulation parameters in a simulator model reconfiguration tool
Poulos An approach for assessing geotechnical reduction factors for pile design
Brostrom et al. On transmission restoration evaluation after ice storms using monte carlo techniques
Adams et al. RF interference at ground stations located in populated areas

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant