CN106850095B - X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method - Google Patents
X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method Download PDFInfo
- Publication number
- CN106850095B CN106850095B CN201510884040.1A CN201510884040A CN106850095B CN 106850095 B CN106850095 B CN 106850095B CN 201510884040 A CN201510884040 A CN 201510884040A CN 106850095 B CN106850095 B CN 106850095B
- Authority
- CN
- China
- Prior art keywords
- transmitting
- receiving
- channel
- antennas
- compatibility
- 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
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention provides a communication receiving and transmitting compatibility testing and analyzing method for an X-band lunar probe. Because the lunar probe is complex in task, the lunar probe generally consists of a plurality of independent sub-probes, and each sub-probe needs to be provided with an independent measurement and control communication system for independently communicating with the earth and carrying out communication between the sub-probes. This results in the lunar probe being equipped with multiple independent X-band communication reception transmission channels (including antennas), each operating at a different frequency. Because the X frequency band range allocated by the international power system for deep space exploration is narrow, the intervals among all frequency points are very small, the volume of the lunar probe is small, the distance between antennas installed on the lunar probe is small, and the communication receiving and transmitting channels are easy to interfere with each other. In order to determine the compatibility among all communication frequencies, the invention provides a communication receiving and transmitting compatibility testing and analyzing method for an X-band lunar probe.
Description
Technical Field
The invention relates to a test and analysis of communication receiving and transmitting compatibility of a lunar probe, in particular to a test and analysis of communication receiving and transmitting compatibility of a lunar probe which comprises a plurality of independent X-frequency band measurement and control communication receiving channels and a plurality of independent X-frequency band measurement and control communication transmitting channels.
Background
In the existing test and analysis of communication receiving and transmitting compatibility of a spacecraft, a common method is to analyze the isolation of multi-communication receiving and transmitting of the spacecraft by using electromagnetic simulation software, obtain an isolation analysis result and then judge the compatibility of the communication receiving and transmitting. The method has the disadvantages that the result of electromagnetic simulation analysis is actually the result of computer calculation based on an electromagnetic field algorithm, and the isolation value from the actual physical value is often in a large error.
Another common method is to directly start all communication devices on a real spacecraft, transmit and receive signals with corresponding frequencies by each antenna, and observe whether the signals of each communication device emit interference. Although the test method is the most true, the test method is not suitable for analysis and demonstration in a scheme design stage and cannot be used for discovering the problem of communication receiving and transmitting compatibility in advance. For this common testing method, since all communication devices have been developed, the layout of the antenna has also been determined, and it is difficult to adjust the design scheme if the compatibility is found to be poor by the test. The disadvantage of this test method is therefore the large capital investment and the inability to find compatibility problems in advance at the design stage.
Disclosure of Invention
The invention aims to provide a communication receiving and transmitting compatibility test and analysis method for an X-band lunar probe, so as to solve the problem of compatibility analysis and verification of a plurality of communication receiving and transmitting channels of the lunar probe.
In order to solve the technical problems, the technical scheme of the invention is as follows: a method for testing the isolation between the communication transceiving antennas of the lunar probe in the X wave band is provided. The method comprises the following steps:
step 1: testing the isolation between each receiving antenna and each transmitting antenna by using a lunar probe radiation model device;
and establishing a radiation modeler of the lunar probe to ensure that the surface electromagnetic radiation characteristic of the lunar probe is consistent with the real surface state of the lunar probe. And mounting all the measurement and control communication antennas on the surface of the radiation model according to the designed layout position. For the directional antenna capable of rotating in two dimensions, two-dimensional rotating device simulation equipment needs to be arranged, is installed on the radiation model device and is used for the directional antenna to rotate at the pointing angle of each wave beam.
Further, a radiation model device (comprising an installed measurement and control communication antenna) is placed at the central position of the microwave darkroom;
further, a vector network analyzer is used for testing the isolation value between every two antennae installed on the radiation model device, and the isolation of a transmitting frequency band is SijDenotes S 'for isolation of reception band'ijTo represent. Assuming that n pairs of antennas are installed in the radiation modeler, wherein the antennas numbered 1, … and m are receiving antennas; the antennas with the numbers of m +1, …, n are transmitting antennas, and the tested isolation value S between the transmitting antennas and the receiving antennas is measuredijAnd S'ij。
The invention provides a communication receiving and transmitting compatibility analysis method, which comprises a transmitting frequency band signal power level algorithm of a transmitting channel coupled to a receiving channel and a receiving frequency band noise power level algorithm of the transmitting channel coupled to the receiving channel.
Further, taking relevant technical indexes designed by the lunar probe measurement and control communication scheme as parameters of the algorithm, the method comprises the following steps: fixed output power PoutTransmit feeder loss TL1Feeder line and filter loss TL in receiving channel2The receiving filter suppresses Tr outside the band at the transmitting frequency and the transmit channel suppresses Dr at the receiving frequency.
Further, the power level of the transmission frequency band signal of the transmission channel coupled to the receiving channel is Pt, and the algorithm is Pt (dBm) = Pout（dBm）+ TL1（dB）+Sij（dB）+TL2(dB) -Tr (dB). Wherein S isijThe actual transmitting frequency band isolation value measured between the transmitting and receiving antennas is a negative value.
Further, the noise power level of the receiving frequency band coupled to the receiving channel by the transmitting channel is Pr (dBm) = Pout（dBm）+Dr（dB）+ TL1（dB）+S′ij（dB）+TL2(dB). Wherein, S'ijThe actual receiving frequency band isolation value measured between the transmitting and receiving antennas is a negative value.
Further, if the power level Pt of the signal in the transmitting frequency band coupled to the receiving channel by the transmitting channel is much smaller than the 1dB saturation input power of the low noise amplifier in the receiving channel, the low noise amplifier can operate stably. The transmit channel is coupled to the receive channel at a transmit frequency band signal power that does not cause the receive channel to saturate.
Further, if the noise power level Pr of the receiving frequency band coupled to the receiving channel by the transmitting channel is far less than the sensitivity value of the receiver, the noise power of the receiving frequency band coupled to the receiving channel by the transmitting channel is considered not to interfere with the receiver.
Furthermore, the compatibility between the communication receiving channel and the transmitting channel is considered to be good only if the power level of the transmitting frequency band signal, coupled to the receiving channel, of the transmitting channel is Pt and the power level of the receiving frequency band noise, coupled to the receiving channel, of the transmitting channel is Pr, which do not cause interference.
The X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method provided by the invention has the following beneficial effects: the isolation between each receiving antenna and each transmitting antenna is tested on a radiation model device of the lunar probe, so that a real antenna isolation value is obtained, and the accuracy and the credibility are higher than those of simulation analysis or calculation; compared with a full real measurement and control communication system, the compatibility test investment is less, and the feasibility is strong.
Through an algorithm of compatibility between independent communication transceiving channels, the transmitting frequency band signal power level of a transmitting channel coupled to a receiving channel and the receiving frequency band noise power level of the transmitting channel coupled to the receiving channel can be calculated in a simplified mode, and whether the transceiving communication systems are compatible or not is judged according to the calculation result. Compared with the traditional algorithm, the algorithm is simpler and more convenient, is tightly combined with engineering application, and avoids complex simulation analysis.
Detailed Description
The following describes in detail the X-band lunar probe communication reception and transmission compatibility testing and analyzing method according to the present invention with reference to specific embodiments.
The lunar probe radiation model device is arranged at the central position of a microwave darkroom, 4 pairs of antennas are arranged on the surface of the radiation model device according to the layout position of the antennas, wherein the antennas 1 and 2 are receiving antennas, the antennas 3 and 4 are transmitting antennas, and the antenna 3 is a directional antenna capable of rotating in two dimensions.
Further, a vector network analyzer is used for testing the isolation value between every two antennae installed on the radiation model device, and the isolation of a transmitting frequency band is SijDenotes S 'for isolation of reception band'ijAnd (4) showing.Assuming that n pairs of antennas are installed in the radiation modeler, wherein the antennas numbered 1, … and m are receiving antennas; the antennas with the numbers of m +1, …, n are transmitting antennas, and the tested isolation value S between the transmitting antennas and the receiving antennas is measuredijAnd S'ijRecorded in the table below.
In order to analyze the compatibility of the communication transmitting channel corresponding to the transmitting antenna of the antenna 3 to the communication receiving channel corresponding to the antenna 2, an isolation test between the antenna 3 and the antenna 2 on the radiation modeler is performed.
The rotating mechanism of the antenna 3 is first turned to the direction of the working beam pointing on the radiation modeler.
Further, the input port of the antenna 2 is connected to the first port of the vector network analyzer by a high-frequency cable; the input port of the antenna 3 is connected to a second port of the vector network analyzer with a high frequency cable.
Further, the vector network analyzer is started, and an S21 transmission coefficient curve between the first port and the second port of the vector network analyzer is tested.
Furthermore, the transmission coefficient value corresponding to the transmission frequency of the antenna 3 and the transmission coefficient value corresponding to the reception frequency of the antenna 2 are identified on the measured S21 transmission coefficient curve, and these two values are recorded as S32And S'32。S32And S'32The transmit-receive isolation value between the antenna 3 and the antenna 2 is obtained through testing.
Further, checking the design parameters of the communication transmission channel corresponding to the transmission antenna of the antenna 3 includes: fixed output power PoutTransmit feeder loss TL1Spurious suppression Dr of the transmit channel at the receive frequency.
Further, checking the design parameters of the communication receiving channel corresponding to the antenna 2 includes: receiving channel internal feeder and filter loss TL2And the receiving filter suppresses Tr out of band at the transmit frequency.
Furthermore, by using the method for analyzing the compatibility of the communication receiving and the transmission provided by the invention, the signal power level of the transmitting frequency band coupled to the receiving channel by the transmitting channel and the noise power level of the receiving frequency band coupled to the receiving channel by the transmitting channel are calculated.
Transmit frequency band signal power level Pt (dBm) = P with transmit channel coupled to receive channelout（dBm）+ TL1（dB）+S32（dB）+TL2（dB）-Tr（dB）。
The noise power level of the receiving frequency band coupled from the transmitting channel to the receiving channel is Pr (dBm) = Pout（dBm）+Dr（dB）+ TL1（dB）+S′32（dB）+TL2（dB）。
Further, if the power level Pt of the signal in the transmitting frequency band coupled to the receiving channel by the transmitting channel is much smaller than the 1dB saturation input power of the low noise amplifier in the receiving channel, the low noise amplifier can operate stably. The transmit channel is coupled to the receive channel at a transmit frequency band signal power that does not cause the receive channel to saturate.
Further, if the noise power level Pr of the receiving frequency band coupled to the receiving channel by the transmitting channel is far less than the sensitivity value of the receiver, the noise power of the receiving frequency band coupled to the receiving channel by the transmitting channel is considered not to interfere with the receiver.
Furthermore, the compatibility between the communication receiving channel and the transmitting channel is considered to be good only if the power level of the transmitting frequency band signal, coupled to the receiving channel, of the transmitting channel is Pt and the power level of the receiving frequency band noise, coupled to the receiving channel, of the transmitting channel is Pr, which do not cause interference.
Those skilled in the art will appreciate that the methods described herein may be implemented in various forms of hardware, software, special purpose processors, or combinations thereof. Given the teachings herein, one of ordinary skill in the related art will be able to contemplate these and similar implementations of the present invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. An X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method is characterized by comprising the following steps:
step 1: testing the isolation between each receiving antenna and each transmitting antenna by using a lunar probe radiation model device;
establishing a radiation modeler of the lunar probe to ensure that the surface electromagnetic radiation characteristic of the lunar probe is consistent with the real surface state of the lunar probe; installing all measurement and control communication antennas on the surface of a radiation model according to the designed layout positions; placing a radiation model device at the central position of a microwave darkroom;
testing the isolation value between every two antennas installed on the radiation model device by using a vector network analyzer, wherein the isolation of a transmission frequency band is SijDenotes S 'for isolation of reception band'ijRepresents; assuming that n pairs of antennas are installed in the radiation modeler, wherein the antennas numbered 1, … and m are receiving antennas; the antennas with the numbers of m +1, …, n are transmitting antennas, and the tested isolation value S between the transmitting antennas and the receiving antennas is measuredijAnd S'ijRecording;
step 2: based on the antenna isolation obtained by testing, the level of a receiving and transmitting signal is calculated by using a receiving and transmitting compatibility algorithm, so that the compatibility of a receiving channel and a transmitting channel is judged;
the method takes relevant technical indexes designed by a lunar probe measurement and control communication scheme as parameters of the algorithm, and comprises the following steps: fixed output power PoutTransmit feeder loss TL1Feeder line and filter loss TL in receiving channel2The receiving filter is used for suppressing Tr outside the band of the transmitting frequency and suppressing Dr of stray of a transmitting channel at the receiving frequency;
the power level of a transmitting frequency band signal of a transmitting channel coupled to a receiving channel is Pt, and the algorithm is Pt (dBm) = Pout（dBm）+ TL1（dB）+Sij（dB）+TL2(dB) -Tr (dB); wherein S isijFor inter-testing of transmitting and receiving antennasThe obtained actual transmitting frequency band isolation value is a negative value;
the noise power level of the receiving frequency band coupled to the receiving channel by the transmitting channel is Pr (dBm) = Pout（dBm）+Dr（dB）+ TL1（dB）+S′ij（dB）+TL2(dB); wherein, S'ijThe actual receiving frequency band isolation value measured between the transmitting and receiving antennas is a negative value.
2. The method for testing and analyzing communication reception and transmission compatibility of an X-band lunar probe according to claim 1, wherein when the compatibility between the receiving channel and the transmitting channel is determined in step 2, if the power level Pt of the transmitting frequency band signal coupled to the receiving channel by the transmitting channel is much smaller than the 1dB saturation input power of the low noise amplifier in the receiving channel, the low noise amplifier can operate stably, and the power of the transmitting frequency band signal coupled to the receiving channel by the transmitting channel does not cause the saturation of the receiving channel.
3. The method for testing and analyzing communication reception and transmission compatibility of an X-band lunar probe according to claim 1, wherein when the compatibility between the receiving channel and the transmitting channel is determined in step 2, if the noise power level Pr of the receiving band coupled to the receiving channel by the transmitting channel is much smaller than the sensitivity value of the receiver, the noise power of the receiving band coupled to the receiving channel by the transmitting channel is considered not to interfere with the receiver.
4. The method for testing and analyzing communication receiving and transmitting compatibility of an X-band lunar probe according to claim 1, wherein when the compatibility between the receiving channel and the transmitting channel is judged in step 2, the power level of the transmitting frequency band signal coupled to the receiving channel by the transmitting channel is Pt, and the power level of the receiving frequency band noise coupled to the receiving channel by the transmitting channel is not interfered, so that the compatibility between the communication receiving channel and the transmitting channel is considered to be good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510884040.1A CN106850095B (en) | 2015-12-07 | 2015-12-07 | X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510884040.1A CN106850095B (en) | 2015-12-07 | 2015-12-07 | X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106850095A CN106850095A (en) | 2017-06-13 |
| CN106850095B true CN106850095B (en) | 2020-05-19 |
Family
ID=59148969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510884040.1A Active CN106850095B (en) | 2015-12-07 | 2015-12-07 | X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106850095B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114499576B (en) * | 2022-01-24 | 2024-06-04 | 中国人民解放军93209部队 | Refined receiving and transmitting control method for electronic equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740873A (en) * | 2010-01-13 | 2010-06-16 | 北京理工大学 | Terahertz-based polarization isolator in synchronous transmitting/receiving wireless system |
| CN101873144B (en) * | 2010-05-28 | 2013-02-27 | 北京航空航天大学 | Electromagnetic compatibility optimizing method for receiver in targeted frequency ranges |
| CN102176689A (en) * | 2011-03-04 | 2011-09-07 | 航天东方红卫星有限公司 | Method for determining isolation between antennas |
| TW201310766A (en) * | 2011-08-26 | 2013-03-01 | Yong-Kang Lv | Directional digital TV antenna |
-
2015
- 2015-12-07 CN CN201510884040.1A patent/CN106850095B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106850095A (en) | 2017-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10263763B2 (en) | Systems, methods, and computer-accessible media for measuring or modeling a wideband, millimeter-wave channel and methods and systems for calibrating same | |
| KR101878530B1 (en) | Over-the-air test | |
| US8502546B2 (en) | Multichannel absorberless near field measurement system | |
| JP5607237B2 (en) | Test system using wireless communication | |
| US9020440B2 (en) | Radio channel data and the use thereof | |
| US7672640B2 (en) | Multichannel absorberless near field measurement system | |
| KR102436859B1 (en) | Method and system for testing wireless performance of wireless terminals | |
| CN107800495A (en) | The system and method that radio channel for multiple-input, multiple-output Radio Link emulates | |
| KR101520563B1 (en) | An emulating system, apparatus and method of an over-the-air test | |
| TWI418162B (en) | Over-the-air test | |
| JP2014512725A (en) | Over the air test | |
| CN104717025A (en) | Method for testing coexisting co-located stray index of active antenna system | |
| CN107959515B (en) | Method and device for measuring noise power of multiple antennas | |
| WO2009046516A1 (en) | Multichannel absorberless near field measurement system | |
| WO2020181320A1 (en) | Method and system for locating a pim fault in a phased array antenna | |
| Rumney et al. | Recent advances in the radiated two-stage MIMO OTA test method and its value for antenna design optimization | |
| CN105281852B (en) | A kind of L-band test equipment and test method | |
| CN107819527A (en) | A kind of test device and method of testing of extensive antenna base station equipment | |
| KR20120072111A (en) | Calibration method using a vector network analyser and delay time measurememt using the same | |
| Rumney et al. | Practical active antenna evaluation using the two-stage MIMO OTA measurement method | |
| CN106850095B (en) | X-band lunar probe communication receiving and transmitting compatibility testing and analyzing method | |
| CN116801302A (en) | WiFi throughput testing system and method | |
| US20200127744A1 (en) | Device and method for receiving and measuring wireless signal | |
| CN116112101A (en) | Air radiation test system, method and tester for wireless equipment | |
| CN111682907B (en) | Satellite antenna isolation high-precision test system |
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 |