CN102710343B - Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method - Google Patents
Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method Download PDFInfo
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- CN102710343B CN102710343B CN201110245439.7A CN201110245439A CN102710343B CN 102710343 B CN102710343 B CN 102710343B CN 201110245439 A CN201110245439 A CN 201110245439A CN 102710343 B CN102710343 B CN 102710343B
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- eirp
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method, and aims at providing an EIRP value testing method which is simple, convenient and reliable to operate, is accurate in measurement, is free from utilizing any external system, avoids the dependence on a calibration tower and has no restriction on the aperture and the working frequency band of an antenna of the tested station. The invention adopts the technical scheme that the method comprises the steps of firstly connecting a single carrier signal outputted by a comprehensive baseband onto an inlet of an up converter (U/C), and setting a small power value of 1% to 2% rated power transmitted by a high-power amplifier (HPA); then extracting an uplink signal at an orientated coupler on the output end of the HPA, switching to a frequency spectrograph through a test switch network, and reading the power level by utilizing the frequency spectrograph; and finally calculating the EIRPs value under the small power according to the known antenna transmission gain, the feeder loss and the coupleness of the orientated coupler, so that the EIRP value of the ground station under the rated power can be deduced.
Description
Technical field
The present invention relates in a kind of Spacecraft TT&C, satellite communication field, ground station's ERP (EIRP value) is without tower-coupled method of testing.Here " ground station " comprises earth-fixed station, vehicle-mounted station, Ship Station.
Background technology
Ground station's ERP (EIRP value) claims again emission system equivalent isotropically radiated power, is the important indicator of weighing ground station's emission system performance, is the mandatory test event that checking was checked and accepted, networked to earth station system.EIRP value is larger, represents that system launching effect is better.The existing EIRP of ground station value method of testing is mainly two kinds:
The one, calibration tower method, on calibration tower, place frequency spectrograph, calibration antenna, joint-trial cable, earth station antenna is to tower, the signal that on tower, frequency spectrograph sends by calibration antenna reception ground station, utilize frequency spectrograph to measure the intensity that receives signal, obtain the EIRP value of system by link calculation.
The 2nd, there is tower without tower Comparison Method, first record EIRP value by calibration tower method and record the power output P of high power amplifier
0, the downstream signal performance number P that the frequency spectrograph while then adopting offset-fed wireless closed-loop to record same high power amplifier power output receives
sPA0.Each employing while having tower to detect without tower Comparison Method afterwards, it is P that high power amplifier power output is set
0, read the performance number P that frequency spectrograph records
sPA1, calculate P
sPA1-P
sPA0obtain the variation of EIRP value, obtain the EIRP value of current system.
There is following shortcoming in above-mentioned prior art:
The one, complex operation.Calibration tower method is tested at every turn and need manually frequency spectrograph be carried on calibration tower, and operational antennas is to tower, sets up the wireless link to tower, and link that test relates to is more, complex steps;
The 2nd, be limited to calibration tower condition.Calibration tower method and have tower without tower Comparison Method all using calibration tower as precondition, if calibration tower does not meet far field condition, such as antenna aperture is too large or frequency range is too high, cannot implement test.
Do not have calibration tower or calibration tower not to meet far field condition during in this locality, existing method all cannot complete the test of EIRP value.Particularly, newly-built high band large aperture antenna earth station system is perplexed by this deeply in recent years.
Summary of the invention
In order to overcome the above-mentioned shortcoming of existing method of testing, improve the convenience of test, realize the EIRP value test of high band large aperture antenna earth station system.The invention provides a kind of easy and simple to handle reliable, measure accurately, without any need for the cooperation of external system, equipment, use completely by survey station equipment of itself, can break away from the dependence to calibration tower, the EIRP value method of testing to tested station antenna bore and working frequency range without any condition restriction.
Above-mentioned purpose of the present invention can reach by following measures.First, the single-carrier signal of base band output is connected to upconverter entrance, high power amplifier (HPA) is sent out small-power; Then, extract upward signal from the directional coupler coupling of HPA output, switching network switches to frequency spectrograph after tested, uses frequency spectrograph read power level; Finally, calculate the EIRPs value under above-mentioned small-power according to known send out antenna gain, feeder loss and the degree of coupling, derive the EIRP value under rated power.Small-power described here, is because specified full power output can affect useful life of HPA, so general 1%～2% the small-power that only needs to send out rated power when test.
The present invention compared to existing technology beneficial effect of method is:
The single-carrier signal of base band output is connected to upconverter entrance by the present invention, and high power amplifier (HPA) is sent out small-power; Then, extract upward signal from the directional coupler coupling of HPA output, switching network switches to frequency spectrograph after tested, uses frequency spectrograph read power level, finally determines EIRP value.Do not need the cooperation of outside any system, equipment, use completely by survey station equipment of itself, thoroughly broken away from the dependence of existing method to calibration tower, without any condition restriction, easy and simple to handle reliable to tested station antenna bore and working frequency range, measure accurately.
Below in conjunction with the drawings and specific embodiments, this method is described further.
Accompanying drawing explanation
The Tu1Shi EIRP of ground station of the present invention value connects block diagram without tower-coupled testing equipment.
Embodiment
Consult Fig. 1, the equipment of participating in the experiment comprises, the antenna, high power amplifier, upconverter and the synthetical baseband that on same link, are in series, ground station's working equipment of composition; And Test Switchboard network and the frequency spectrograph of the directional coupler of connecting on link, the supporting calibration testing equipment of ground station of composition.Antenna, high power amplifier, upconverter and synthetical baseband are connected on same link, and base band is signaled and sent into high power amplifier (high power amplifier, HPA) by upconverter, and signal power is amplified antennas by high power amplifier.On link, from directional coupler connected Test Switchboard network and frequency spectrograph, directional coupler extracts upward signal, and switching network switches and enters frequency spectrograph, read power level after tested.
The test of EIRP value is carried out in employing without tower-coupled method before, Accurate Calibration antenna transmission gain G, degree of coupling C, a feeder loss L in advance
tdata.Antenna transmission gain G, degree of coupling C can adopt the calibration value of antenna producer and Microwave Component Production producer, send out feeder loss L
tusable spectrum instrument or vector network analyzer Accurate Calibration.
While adopting EIRP value without tower-coupled method test, first, the single-carrier signal of base band output is connected to upconverter entrance, high power amplifier HPA sends out small-power; Then, the upward signal being coupled out from the directional coupler of HPA output, switching network switches to frequency spectrograph after tested, uses frequency spectrograph read power level; Finally, calculate the EIRPs value under small-power according to known antenna transmission gain, feeder loss, the degree of coupling, can derive the EIRP value under ground station's rated power.Calculated by following formula by survey station EIRP value
EIRP|
tested=P+C-L
t+ G+ (P
max-P
t) (1)
The pass of rated power EIRP value and small-power EIRP value is
EIRP|
tested=EIRP
s+ (P
max-P
t) (2)
In formula: P is the high power amplifier transmitting power that frequency spectrograph records, the degree of coupling that C is directional coupler, L
tfor sending out feeder loss, G is for sending out antenna gain, P
maxfor high power amplifier rated output power, P
tfor high power amplifier real output.The concrete testing procedure of EIRP value is:
A) monitoring subsystem control base band bill carrier wave;
B) the output small-power of the high power amplifier of monitoring subsystem control;
C) monitoring subsystem control Test Switchboard network is switched to frequency spectrograph;
D) artificial or by automatic test subsystem control frequency spectrograph measured power;
E) according to antenna transmission gain G, the feeder loss L of formula (1), (2) and bookbinding in advance
t, degree of coupling C data calculate the EIRP value under ground station's rated power.
Claims (3)
1. the EIRP of a ground station value is without tower-coupled method of testing, it is characterized in that following steps: first, the single-carrier signal of synthetical baseband output is connected to upconverter U/C entrance, the small-power value of high power amplifier HPA transmitting 1%～2% rated power is set, gone out by aerial radiation; Then, extract upward signal from the directional coupler coupling of HPA output, switching network switches to frequency spectrograph after tested, uses frequency spectrograph read power level; Finally, calculate the equivalent isotropically radiated power EIRPs of the ground station value under above-mentioned small-power according to known antenna transmission gain, feeder loss and the directional coupler degree of coupling, derive under ground station's rated power by survey station EIRP value;
EIRP|
tested=P+C-L
t+ G+ (P
max-P
t)
=EIRP
s+(P
max-P
t)
In formula: P is the high power amplifier transmitting power that frequency spectrograph records, the degree of coupling that C is directional coupler, L
tfor sending out feeder loss, G is antenna transmission gain, P
maxfor high power amplifier rated output power, P
tfor high power amplifier real output.
2. the EIRP of ground station value according to claim 1, without tower-coupled method of testing, is characterized in that, is comprised by the test of survey station EIRP value:
A) monitoring subsystem control base band bill carrier wave;
B) the high power amplifier output of monitoring subsystem control small-power;
C) monitoring subsystem control Test Switchboard network is switched to frequency spectrograph;
D) artificial or by automatic test subsystem control frequency spectrograph measured power;
E) the power P value being read by frequency spectrograph and known antenna transmission gain G, feeder loss L
t, degree of coupling C data, according to EIRP value formula, calculate the EIRP value under rated power.
3. the EIRP of ground station value according to claim 1 is without tower-coupled method of testing, it is characterized in that, the equipment of participating in the experiment comprises, ground station's working equipment of antenna, high power amplifier, upconverter and the synthetical baseband composition being in series on same link, and the supporting calibration testing equipment of ground station of the Test Switchboard network of the directional coupler of connecting on link and frequency spectrograph composition.
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| CN201110245439.7A CN102710343B (en) | 2011-08-25 | 2011-08-25 | Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method |
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| CN201110245439.7A CN102710343B (en) | 2011-08-25 | 2011-08-25 | Ground station equivalent isotropic radiated power (EIRP) value towerless coupling testing method |
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| US10211530B2 (en) * | 2016-07-01 | 2019-02-19 | Gogo Llc | Dynamic effective radiated power (ERP) adjustment |
| CN106712865A (en) * | 2016-12-15 | 2017-05-24 | 中国电子科技集团公司第二十研究所 | Apparatus used for inter-station satellite communication link self-detection and method thereof |
| CN207302311U (en) * | 2017-08-24 | 2018-05-01 | 深圳市大疆创新科技有限公司 | Remote Slave Set, remote controler and remote control system |
| CN116388894B (en) * | 2023-06-06 | 2023-08-22 | 中国电子科技集团公司第五十四研究所 | Non-stationary orbit satellite emission EIRP value test method |
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| CN101826924A (en) * | 2010-03-15 | 2010-09-08 | 中国电子科技集团公司第十研究所 | Detection method of EIRP (Equivalent Isotropic Radiated Power) value tower and tower-free comparison |
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| CN101826924A (en) * | 2010-03-15 | 2010-09-08 | 中国电子科技集团公司第十研究所 | Detection method of EIRP (Equivalent Isotropic Radiated Power) value tower and tower-free comparison |
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