CN110212998B - Method and device for testing and determining the repeating noise of a measurement and control transponder - Google Patents
Method and device for testing and determining the repeating noise of a measurement and control transponder Download PDFInfo
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Abstract
The invention provides a method and equipment for testing and determining the forwarding noise of a measurement and control responder, wherein the method comprises the following steps: the ground measurement and control equipment sends an uplink single carrier to the measurement and control responder and adjusts an uplink attenuator; the ground measurement and control equipment starts bidirectional capture and tests the modulation index m of the leading tone of the downlink distance measurementR0And residual carrier power P0(ii) a The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level I after attenuationiAnd then, the ground measurement and control equipment starts bidirectional capture, sends a ranging tone signal after the bidirectional capture is finished, and tests a downlink ranging tone modulation index mRiAnd residual carrier power Pi(ii) a And a dominant tone modulation index m based on downlink rangingR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss. The invention solves the problem of accurate calculation of the forwarding noise of the measurement and control transponder, thereby realizing higher-precision link budget.
Description
Technical Field
The present invention relates generally to the field of aerospace measurement and control. More particularly, the present invention relates to a method and apparatus for testing and determining the repeating noise of a measurement and control transponder.
Background
In the aerospace measurement and control, an important function of the satellite-borne measurement and control transponder is to realize high-precision navigation by matching with ground measurement and control equipment to measure the satellite-ground distance. At present, most of the ranging channels of the transponders adopt a transparent forwarding mode. In this mode, not only useful ranging signals are forwarded to the downlink, but also unwanted signals such as noise and residual remote control. In the measurement and control of the earth orbit spacecraft, the influence of forwarding noise is small. However, for remote measurement and control of lunar and deep space exploration tasks, forwarding noise cannot be ignored under the conditions that signals received by a measurement and control transponder are weak and the measurement and control uplink and downlink margins are tight.
In the link budget of the current deep space spacecraft, the forwarding noise is usually estimated by a theoretical model. The Control of the ranging channel of the common measurement and Control transponder to the power of the received signal can be divided into modes such as an incoherent AGC (Automatic Gain Control), a coherent AGC, a limiter, a radio frequency incoherent AGC, a radio frequency coherent AGC, and the like, and the downlink forwarding noise of the transponder can be calculated according to a theoretical model in the corresponding Control mode. This is also the common practice in the link budget of the current deep space spacecraft. However, the actual measurement and control transponder sometimes has a complex design condition and cannot be simply classified into the above model. In this case, if a high accuracy link budget is required, the above theoretical model cannot be used to estimate the forward noise.
Disclosure of Invention
In view of one or more problems in the prior art discussed above, the present invention provides a method for increasing the downlink carrier power of the measurement and control transponder, the residual remote control modulation degree test, and the like in the transponder forwarding performance test, and calculating the power loss caused by the forwarding noise under the microwave unified measurement and control system signal model, so as to solve the accurate calculation problem of the forwarding noise of the measurement and control transponder, thereby realizing a higher-precision link budget.
To this end, in one aspect, the present invention provides a method for testing and determining the repeating noise of a measurement and control transponder, comprising:
the ground measurement and control equipment sends an uplink single carrier to the measurement and control transponder and adjusts an uplink attenuator so that the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored;
the ground measurement and control equipment starts bidirectional capture, sends a ranging tone signal after the bidirectional capture is finished, and tests a downlink ranging tone modulation index mR0And residual carrier power P0；
Increasing the attenuation value of the upstream attenuator step by step to reduce the transponder input signal level and at each input signal level IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index based on downlink distance measurementmR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
In one embodiment, wherein said step increasing the attenuation of said upstream attenuator may comprise increasing said attenuation by one of attenuation values of 10dB, 9dB, 8dB, 7dB, 6dB, 5dB, 4dB, 3dB, 2dB, 1 dB.
In one embodiment, wherein the different input signal levels I are determined according to the following equation (1)iThe following forwarding noise loss:
wherein J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
In another embodiment, where the ranging pitch signal is sent after bi-directional acquisition is completed, the downlink ranging pitch modulation index m is testedR0And residual carrier power P0Further comprising:
transmitting remote control subcarriers after completing bidirectional capturing, and testing residual remote control modulation index mTc01。
In further embodiments, wherein at each input signal level IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiFurther comprising:
testing residual remote control modulation index mTcil。
In one embodiment, wherein the different input signal levels I are determined according to the following equation (2)iThe following forwarding noise loss:
wherein J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
In another aspect, the present invention provides an apparatus for testing and determining the repeating noise of a measurement and control transponder, comprising:
a transceiver configured for bidirectional communication with a measurement and control transponder;
a processor;
a memory comprising computer-readable instructions that, when executed by the processor, cause the apparatus to:
sending an uplink single carrier to the measurement and control responder and adjusting an uplink attenuator to enable the total input level of the measurement and control responder to be at the level that the forwarding noise is ignored;
starting bidirectional capture, sending a ranging tone signal after completing bidirectional capture, and testing a modulation index m of a downlink ranging toneR0And residual carrier power P0；
The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiThen, starting bidirectional capture, sending the ranging leading tone signal after completion, and testing the modulation index m of the downstream ranging leading toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index m based on downlink distance measurementR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
In one or more embodiments, the apparatus of the above aspect may also perform various steps in the method of the foregoing aspect.
In yet another aspect, the present invention also provides a computer readable storage medium including a program for testing and determining the repeating noise of a measurement and control transponder, which when executed by a processor performs the following operations:
the ground measurement and control equipment sends an uplink single carrier to the measurement and control transponder and adjusts an uplink attenuator so that the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored;
the ground measurement and control equipment starts bidirectional capture, sends a ranging tone signal after the bidirectional capture is finished, and tests a downlink ranging tone modulation index mR0And residual carrier power P0；
The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index m based on downlink distance measurementR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
In one or more embodiments, the computer-readable storage medium described above further comprises instructions that, when executed by the processor, perform the steps of the method of the preceding aspect.
According to the technical scheme of the invention, for example, in the transponder ranging forwarding modulation degree test, the downlink carrier power of the measurement and control transponder, the residual remote control modulation degree test and the like are added, and the power loss caused by the forwarding noise is calculated and obtained under a microwave unified measurement and control system signal model. The testing and calculating method does not depend on the specific design of the ranging channel of the measurement and control transponder, and the calculation result can be used for high-precision link budget of a spacecraft (particularly a deep space spacecraft) and assisting the design of a measurement and control task scheme.
Drawings
The invention and its advantages will be better understood by reading the following description, provided by way of example only, and made with reference to the accompanying drawings, in which:
FIG. 1 is a flow diagram of a method for testing and determining the repeating noise of a measurement and control transponder according to an embodiment of the present invention;
FIG. 2 is a block diagram of an apparatus for testing and determining the repeating noise of a measurement and control transponder according to an embodiment of the present invention; and
FIG. 3 is a block diagram of a measurement and control transponder forward noise test system according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention can be mainly used for testing and calculating the downlink forwarding noise of the measurement and control transponder. In one aspect, the technical scheme of the invention calculates and obtains the power loss caused by the forwarding noise by measuring the downlink carrier power of the measurement and control transponder under the condition of different uplink signal powers based on a microwave unified measurement and control system signal model, thereby providing a basis for the high-precision link budget and the measurement and control task scheme design of the spacecraft.
Various aspects of the present invention and embodiments thereof are described in detail below with reference to the accompanying drawings.
FIG. 1 is a flow diagram of a method 100 for testing and determining the repeating noise of a measurement and control transponder in accordance with an embodiment of the present invention. As shown in fig. 1, at step 102, the ground measurement and control device sends an uplink single carrier to the measurement and control transponder and adjusts an uplink attenuator so that the total input level of the measurement and control transponder is at a level where the forwarding noise is ignored. At step 104, the ground measurement and control equipment starts bidirectional acquisition, sends a ranging tone signal after completing bidirectional acquisition, and tests a modulation index m of a downlink ranging toneR0And residual carrier power P0。
The flow continues by increasing the attenuation value of the uplink attenuator step by step at step 106 to decrease the transponder input signal level (e.g. up to a threshold level) and each input signal level I after attenuationiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiAnd i represents the number of steps.
At step 110, based on downlink rangingModulation index m of the keyR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss. In one embodiment, incrementally increasing the attenuation of the upstream attenuator may include increasing the attenuation by one of attenuation values of 10dB, 9dB, 8dB, 7dB, 6dB, 5dB, 4dB, 3dB, 2dB, 1 dB.
In another embodiment, wherein the different input signal levels I are determined according to the following equation (1)iThe following forwarding noise loss:
wherein J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
In yet another embodiment, where the ranging pitch signal is transmitted after bi-directional acquisition is completed, the downlink ranging pitch modulation index m is testedR0And residual carrier power P0Further comprising: transmitting remote control subcarriers after completing bidirectional capturing, and testing residual remote control modulation index mTc01。
In an additional embodiment, wherein at each input signal level IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiFurther comprising: testing residual remote control modulation index mTcil。
In one embodiment, wherein the different input signal levels I are determined according to the following equation (2)iThe following forwarding noise loss:
wherein J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
FIG. 2 is a block diagram of an apparatus 200 for testing and determining the repeating noise of a measurement and control transponder according to an embodiment of the present invention. As shown in FIG. 2, the device 200 includes a transceiver 202 configured for bi-directional communication with an instrumentation transponder, a processor 204, and a memory 206, wherein the memory 206 includes computer-readable instructions that, when executed by the processor, cause the device 200 to: sending an uplink single carrier to the measurement and control responder and adjusting an uplink attenuator to enable the total input level of the measurement and control responder to be at the level that the forwarding noise is ignored; starting bidirectional capture, sending a ranging tone signal after completing bidirectional capture, and testing a modulation index m of a downlink ranging toneR0And residual carrier power P0(ii) a The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiThen, starting bidirectional capture, sending the ranging leading tone signal after completion, and testing the modulation index m of the downstream ranging leading toneRiAnd residual carrier power PiI represents the number of steps; and a dominant tone modulation index m based on downlink rangingR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
In one or more embodiments, the device 200 may also perform the various steps of the method 100 and its various embodiments described previously.
FIG. 3 is a block diagram of a measurement and control transponder forward noise test system 300 according to an embodiment of the present invention. As shown in fig. 3, the test system 300 includes on-board test and control equipment 302, ground test and control equipment 304, spacecraft ground inspection equipment 306, a spectrometer 308, and a spectrometer 324.
The on-board measurement and control equipment 302 comprises a measurement and control transponder 310 which is configured in a coherent and ranging communication state and is in bidirectional communication with the spacecraft ground detection equipment 306; in addition, the signal sent to the measurement and control transponder 310 is also sent to the spectrometer 324. The on-board plant 302 also includes a solid state amplifier 312 that power amplifies the output signal of the plant transponder. The ground monitor 304 includes a transmitting subsystem 314, a receiving subsystem 316, and a multi-functional baseband device 318, wherein the output signal of the receiving subsystem 314 is further sent to a spectrum analyzer 324 via an uplink attenuator 320. After the multifunctional baseband device 318 completes the operations of signal modulation, etc., the signal is transmitted to the transmitting subsystem 314 to complete the up-conversion, etc., and then is transmitted to the measurement and control transponder 310 through the uplink attenuator 320. On the other hand, the output signal of the measurement and control transponder 312 is transmitted to the solid-state amplifier 312 to complete signal amplification, then transmitted to the receiving subsystem 316 through the downlink attenuator 322 to complete down-conversion and other operations, and then transmitted to the multifunctional baseband device 318 to complete signal demodulation and other operations.
The following will further describe the embodiments of the present invention by taking the ground test and calculation of a deep space transponder in S frequency band of a certain microsatellite as an example. The deep space transponder adopts a common sine wave modulation side tone ranging (100 kHz of the main tone), remote control and remote measuring system. Before testing, the on-board measurement and control equipment is communicated with the uplink and downlink channels of the ground measurement and control equipment through the uplink and downlink attenuators, as shown in fig. 3.
Under the condition that only the distance measurement tone is added in the uplink, the steps of testing and calculating the forwarding noise of the measurement and control responder are as follows:
step 1: the satellite measurement and control transponder is placed in a coherent and ranging state through spacecraft ground detection equipment. The ground measurement and control equipment sends an uplink single carrier, and adjusts an uplink attenuator to enable the total level of an input signal of the responder to be-80 dBm; the ground measurement and control equipment starts bidirectional capture, sends a distance measurement leading tone signal after the bidirectional capture is finished, and measures a downlink distance measurement leading tone modulation index m through a frequency spectrographR0(rad) and residual carrier power P0(dBm) was 0.69(rad) and-20.70 (dBm), respectively.
Step 2: the attenuation value of the uplink attenuator is increased by stepping 10dB, 5dB and 2dB from-80 dBm, and the input signal level of the transponder is reduced until the threshold level is-128 dBm (see the columns 2 and 3 in the table 1); at each input signal level IiAnd (i is 1, 2, 9, which is the number of stepping times), the ground measurement and control equipment starts bidirectional capture, sends a ranging master tone signal after completion, and tests downlink signals through a frequency spectrographDistance measurement leading tone modulation index mRi(rad) and residual carrier power Pi(dBm) (see columns 4 and 5 of Table 1).
And step 3: calculating different input signal levels I according to equation (1)iThe forward noise loss (dB) below (see the last column of table 1). Take the uplink level-120 dBm with i ═ 5 as an example, the corresponding forwarding noise loss (dB):
in the formula, J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
Under the condition of uplink simultaneous modulation of distance measurement tones and remote control, the test and calculation steps of the measurement and control transponder forwarding noise are as follows:
and 4, step 4: the satellite measurement and control transponder is placed in a coherent and ranging state through spacecraft ground detection equipment. The ground measurement and control equipment sends an uplink single carrier, and adjusts an uplink attenuator to enable the total level of an input signal of the responder to be-80 dBm; the ground measurement and control equipment starts bidirectional capture, sends a distance measurement main tone signal and a remote control subcarrier (long transmission) after completion, and measures a modulation index m of a downlink distance measurement main tone through a frequency spectrographR01(rad), residual remote control modulation index mTC01(rad) and residual carrier power P01(dBm) is 0.69(rad), 0.08(rad), or-20.82 (dBm), respectively.
And 5: the attenuation value of the uplink attenuator is increased by stepping 10dB, 5dB and 2dB from-80 dBm, and the input signal level of the transponder is reduced until the threshold level is-128 dBm (see the columns 2 and 3 of the table 2); at each input signal level IiAnd (i is 1, 2, 9, which is the number of stepping times), the ground measurement and control equipment starts bidirectional capture, sends a ranging master tone signal and a remote control subcarrier (long transmission) after the bidirectional capture is finished, and tests a modulation index m of the downlink ranging master tone through a frequency spectrographRi1(rad), residual remote control modulation index mTcil(rad) and residual carrier power Pi1(dBm) (see columns 4 and 5 of Table 2).
Step 6: calculating different input signal levels I according to equation (2)iLower forwarding noise loss(dB) (see the last column of Table 2). Take the uplink level-120 dBm with i ═ 5 as an example, the corresponding forwarding noise loss (dB):
in the formula, J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
Table 1: measurement and control transponder forwarding noise loss calculation result (uplink only added tone distance measurement tone)
Table 2: measurement and control transponder forwarding noise loss calculation result (uplink simultaneous modulation distance measurement tone and remote control subcarrier)
The method for testing and determining the repeating noise of a measurement and control transponder of the present invention may be embodied by a computer readable code in a computer readable recording medium. The computer-readable recording medium includes all kinds of recording media storing data that can be interpreted by a computer system. The recording medium may include, for example, but is not limited to, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, a flash Memory, and the like. Further, these computer-readable recording media can be propagated or spread among various communication entities over a communication network (including a computer communication network, a cellular communication network, or a local area communication network), so that the computer-readable instructions or computer-executable code stored on the computer-readable storage media can also be executed in any manner.
Although the present invention is described in the above embodiments, the description is only for the convenience of understanding the present invention, and is not intended to limit the scope and application of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A method for testing and determining the repeating noise of a measurement and control transponder, comprising:
the ground measurement and control equipment sends an uplink single carrier to the measurement and control transponder and adjusts an uplink attenuator so that the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored;
the ground measurement and control equipment starts bidirectional capture, sends a ranging tone signal after the bidirectional capture is finished, and tests a downlink ranging tone modulation index mR0And residual carrier power P0；
The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index m based on downlink distance measurementR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
2. The method of claim 1, wherein the different input signal levels I are determined according to equation (1) belowiThe following forwarding noise loss:
whereinJ0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
3. The method of claim 1, wherein the ranging tone signal is transmitted after completing the bi-directional acquisition, testing a downlink ranging tone modulation index mR0And residual carrier power P0Further comprising:
transmitting remote control subcarriers after completing bidirectional capturing, and testing residual remote control modulation index mTc01。
4. A method according to claim 3, wherein at each input signal level IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiFurther comprising:
testing residual remote control modulation index mTcil。
5. The method of claim 4, wherein the different input signal levels I are determined according to equation (2) belowiThe following forwarding noise loss:
wherein J0Represents a Bessel function of order 0, with the subscript dB representing taking 10log10(·); m isR01When the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored, the ground measurement and control equipment starts bidirectional capture, and measures the modulation index of the downlink distance measurement keytone after sending a distance measurement keytone signal and a remote control subcarrier; p01When the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored, the ground measurement and control equipment starts bidirectional capture, and measures the residual carrier power after sending a distance measurement master tone signal and a remote control subcarrier; m isRi1At each input signal level IiUnder, ground measurement and control equipment starts two-way catchingObtaining, and after sending a ranging tone signal and a remote control subcarrier, measuring a downlink ranging tone modulation index; pi1At each input signal level IiAnd then, the ground measurement and control equipment starts bidirectional capture, and measures the residual carrier power after sending the ranging master tone signal and the remote control subcarrier.
6. An apparatus for testing and determining the repeating noise of a measurement and control transponder, comprising:
a transceiver configured for bidirectional communication with a measurement and control transponder;
a processor;
a memory comprising computer-readable instructions that, when executed by the processor, cause the apparatus to:
sending an uplink single carrier to the measurement and control responder and adjusting an uplink attenuator to enable the total input level of the measurement and control responder to be at the level that the forwarding noise is ignored;
starting bidirectional capture, sending a ranging tone signal after completing bidirectional capture, and testing a modulation index m of a downlink ranging toneR0And residual carrier power P0；
The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiThen, starting bidirectional capture, sending the ranging leading tone signal after completion, and testing the modulation index m of the downstream ranging leading toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index m based on downlink distance measurementR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
7. The apparatus of claim 6, wherein the forward noise loss at the different input signal levels Ii is determined according to the following equation (1):
wherein J0The 0 th order Bessel function is expressed and the subscript dB indicates that 10log10(·) is taken.
8. The apparatus of claim 6, wherein the instructions, when executed by the processor, cause the apparatus to further perform operations comprising:
transmitting remote control subcarriers after completing bidirectional capturing, and testing residual remote control modulation index mTc01；
At each input signal level IiNext, the residual remote control modulation index m is also testedTcil；
Determining the different input signal levels I according to the following equation (2)iThe loss of the forward noise in the lower,
wherein J0Represents a Bessel function of order 0, with the subscript dB representing taking 10log10(·); m isR01When the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored, the ground measurement and control equipment starts bidirectional capture, and measures the modulation index of the downlink distance measurement keytone after sending a distance measurement keytone signal and a remote control subcarrier; p01When the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored, the ground measurement and control equipment starts bidirectional capture, and measures the residual carrier power after sending a distance measurement master tone signal and a remote control subcarrier; m isRi1At each input signal level IiNext, the ground measurement and control equipment starts bidirectional capture, and sends a ranging master tone signal and a remote control subcarrier to measure a downlink ranging master tone modulation index; pi1At each input signal level IiThen, the ground measurement and control equipment starts bidirectional capture and sends a distance measurement primary sound signal and a remote control pairAnd after the carrier wave, measuring the residual carrier wave power.
9. A computer readable storage medium containing a program for testing and determining the repeating noise of a measurement and control transponder, which when executed by a processor performs the operations of:
the ground measurement and control equipment sends an uplink single carrier to the measurement and control transponder and adjusts an uplink attenuator so that the total input level of the measurement and control transponder is at the level that the forwarding noise is ignored;
the ground measurement and control equipment starts bidirectional capture, sends a ranging tone signal after the bidirectional capture is finished, and tests a downlink ranging tone modulation index mR0And residual carrier power P0；
The attenuation value of the upstream attenuator is increased stepwise to reduce the transponder input signal level, and each input signal level after attenuation IiAnd then, the ground measurement and control equipment starts bidirectional capture, sends the ranging master tone signal after the bidirectional capture is finished, and tests the modulation index m of the downlink ranging master toneRiAnd residual carrier power PiI represents the number of steps; and
dominant tone modulation index m based on downlink distance measurementR0Residual carrier power P0And downlink distance measurement major tone modulation index mRiAnd residual carrier power PiTo determine different input signal levels IiThe following forwarding noise loss.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483682A (en) * | 2014-11-28 | 2015-04-01 | 上海无线电设备研究所 | S-wave band uniform measuring and control system, sidetone extraction module thereof and distance measuring tone forwarding method |
| CN106100658A (en) * | 2016-07-07 | 2016-11-09 | 上海航天测控通信研究所 | Spaceborne S band Dual Channel observing and controlling receiver |
| CN107994920A (en) * | 2017-11-22 | 2018-05-04 | 南京理工大学 | A kind of cube Satellite TT answering machine and its coherent signal retransmission method |
| DE102017214889A1 (en) * | 2017-08-25 | 2019-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Distance measurement in radio identification systems |
-
2019
- 2019-05-05 CN CN201910367475.7A patent/CN110212998B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483682A (en) * | 2014-11-28 | 2015-04-01 | 上海无线电设备研究所 | S-wave band uniform measuring and control system, sidetone extraction module thereof and distance measuring tone forwarding method |
| CN106100658A (en) * | 2016-07-07 | 2016-11-09 | 上海航天测控通信研究所 | Spaceborne S band Dual Channel observing and controlling receiver |
| DE102017214889A1 (en) * | 2017-08-25 | 2019-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Distance measurement in radio identification systems |
| CN107994920A (en) * | 2017-11-22 | 2018-05-04 | 南京理工大学 | A kind of cube Satellite TT answering machine and its coherent signal retransmission method |
Non-Patent Citations (2)
| Title |
|---|
| 一种收发信机的设计和实现;张俞;《中国优秀硕士论文全文数据库 信息科技辑》;20130315;全文 * |
| 小型测控应答机的研制与改进;周阳;《中国优秀硕士论文全文数据库 信息科技辑》;20110715;全文 * |
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