CN107817479B - A kind of test macro and method of high power digital transmitting-receiving subassembly noise coefficient - Google Patents
A kind of test macro and method of high power digital transmitting-receiving subassembly noise coefficient Download PDFInfo
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- CN107817479B CN107817479B CN201710978786.8A CN201710978786A CN107817479B CN 107817479 B CN107817479 B CN 107817479B CN 201710978786 A CN201710978786 A CN 201710978786A CN 107817479 B CN107817479 B CN 107817479B
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- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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Abstract
The invention discloses the test macros and method of a kind of high power digital transmitting-receiving subassembly noise coefficient, the wherein optical fiber test equipment of system, it is not received under analog echo signal state for receiving tested high power digital transmitting-receiving subassembly, first base band echo data of output determines the average noise power of tested high power digital transmitting-receiving subassembly according to the first base band echo data；Reception is stated tested high power digital transmitting-receiving subassembly and is received under analog echo signal state, second base band echo data of output, determine the output power of signal output apparatus and the signal power of the second base band echo data, signal gain is determined according to output power and signal power, and determines the three dB bandwidth of base band echo data；Optical fiber test equipment, for determining the noise coefficient of tested high power digital transmitting-receiving subassembly according to average noise power, signal gain and three dB bandwidth combination noise coefficient formula.Above system solves the problems, such as that the noise coefficient index of current high power digital transmitting-receiving subassembly is unable to measure.
Description
Technical field
The present invention is to belong to gadget field, in particular to a kind of test of high power digital transmitting-receiving subassembly noise coefficient
System and method.
Background technique
High power digital transmitting-receiving subassembly is the important component of array radar, and performance indicator directly affects the property of radar
Energy, power and cost.Whether meet technique and tactics requirement for verifying radar system, in addition to the transmission power for digital transmitting and receiving component
It measures outer, it is also necessary to pay close attention to the noise coefficient of each receiving channel.Currently, due to the transmitting function of digital transmitting and receiving component
Rate is typically larger than 100W, and transmitting-receiving port can just be tested after must accessing the attenuator of 30dB or more, and tests used
Noise source ENR (excess noise ratio) is no more than 20dB, and the noises from noise sources power after the decaying of attenuator 30dB is received close to number
The bottom power of making an uproar of component receiving channel is sent out, therefore leads to not complete noise-factor measurement test.
Summary of the invention
In view of the above technical problems, the present invention, which provides one kind, can effectively solve current high power digital transmitting-receiving subassembly using big
Power attenuator is matched, and noise coefficient index is caused to be unable to measure the high power digital transmitting-receiving subassembly noise coefficient of problem
Test macro and method.
In order to solve the above technical problems, the technical solution used in the present invention is: providing a kind of high power digital transmitting-receiving group
The test macro of part noise coefficient, including tested high power digital transmitting-receiving subassembly and the tested high power digital transmitting-receiving subassembly
The signal output apparatus for exporting analog echo signal and the on-off light for controlling the analog echo signal of connection
Fine test equipment, the signal output apparatus are connect with the optical fiber test equipment；
The optical fiber test equipment does not receive the analogue echo for receiving the tested high power digital transmitting-receiving subassembly
Under signal condition, the first base band echo data of output, according to the first base band echo data determine it is described be tested it is high-power
The average noise power of digital transmitting and receiving component；
It receives the tested high power digital transmitting-receiving subassembly to receive under the analog echo signal state, the second base of output
Band echo data, determines the output power of the signal output apparatus and the signal power of the second base band echo data,
Signal gain is determined according to the output power and the signal power, and determines the three dB bandwidth of the base band echo data；
The optical fiber test equipment is also used to determine the tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Noise coefficient；
Wherein: PNoiseThe average noise function under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is tested high power digital transmitting-receiving
Component receives the three dB bandwidth under analog echo signal state.
The invention adopts the above technical scheme, the technical effect reached are as follows: not by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, determines the average noise of tested high power digital transmitting-receiving subassembly
Power is determined by the second base band echo data being tested under high power digital transmitting-receiving subassembly reception analog echo signal state
Signal gain and three dB bandwidth can effectively calculate tested high power digital transmitting-receiving subassembly in conjunction with noise coefficient formula
Noise coefficient.The systems and methods solve current high power digital transmitting-receiving subassembly by signal source and optical fiber test equipment
The problem of being matched using high power attenuator, noise coefficient index caused to be unable to measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicability.
More preferably, in the above-mentioned technical solutions, the signal output apparatus includes receiving and dispatching with the tested high power digital
The high power attenuator of component connection and the signal source being connect with the high power attenuator and optical fiber test equipment；
The signal source, for exporting the analog echo signal of generation to the high power attenuator；
The high power attenuator, for decaying to the analog echo signal, and by the analogue echo after decaying
Signal is sent to the tested high power digital transmitting-receiving subassembly.
More preferably, in the above-mentioned technical solutions, the system also includes with the signal source, the tested high power digital
Transmitting-receiving subassembly and the frequency synthesizer of optical fiber test equipment connection；
The frequency synthesizer, for providing coherent reference clock for the signal source, being that the optical fiber test equipment mentions
Local oscillation signal is provided for sampled reference clock, for the tested high power digital transmitting-receiving subassembly.
More preferably, in the above-mentioned technical solutions, the system also includes with the signal source, the optical fiber test equipment with
And the router of the frequency synthesizer connection；
The router, for forwarding the optical fiber test equipment to be sent to the frequency synthesizer and the signal source
Control instruction.
Additionally provide a kind of test method of high power digital transmitting-receiving subassembly noise coefficient, comprising the following steps:
Step S10: it obtains tested high power digital transmitting-receiving subassembly and does not receive first exported under analog echo signal state
Base band echo data determines the average noise of the tested high power digital transmitting-receiving subassembly according to the first base band echo data
Power；
Step S20: it obtains tested high power digital transmitting-receiving subassembly and receives the second base exported under analog echo signal state
Band echo data and the output power of original analog echo-signal determine the base according to the second base band echo data
Signal power with echo data and the broadband 3dB；
And the signal gain of the base band echo data is determined according to the output power and the signal power；
Step S30: according to noise coefficient formula, the noise coefficient of the tested high power digital transmitting-receiving subassembly is determined.
Invention uses above technical scheme, the technical effect reached are as follows: is not connect by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, determines the average noise function of tested high power digital transmitting-receiving subassembly
Rate determines letter by the second base band echo data being tested under high power digital transmitting-receiving subassembly reception analog echo signal state
Number gain and three dB bandwidth can effectively calculate making an uproar for tested high power digital transmitting-receiving subassembly in conjunction with noise coefficient formula
Sonic system number.The systems and methods solve current high power digital transmitting-receiving subassembly and adopt by signal source and optical fiber test equipment
The problem of being matched with high power attenuator, noise coefficient index caused to be unable to measure.Meanwhile the systems and methods have
Very strong adaptability can be easily integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Any hardware device has very high practicability.
More preferably, in the above-mentioned technical solutions, described to obtain tested high power digital transmitting-receiving subassembly reception analogue echo letter
The the second base band echo data exported and the output power of original analog echo-signal under number state, specifically include following step
It is rapid:
Step S21: analog echo signal is generated；
Step S22: decaying to the analog echo signal, and the analog echo signal after decaying is sent to described
Tested high power digital transmitting-receiving subassembly；
Step S23: the second base band echo data that the tested high power digital transmitting-receiving subassembly issues is received；
Step S24: the output power of the analog echo signal is obtained.
More preferably, in the above-mentioned technical solutions, the noise coefficient formula are as follows:
Wherein: PNoiseThe average noise function under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is the schematic frame diagram of test macro of high power digital transmitting-receiving subassembly noise coefficient provided by the invention；
Fig. 2 is the schematic flow chart of the test method of high power digital transmitting-receiving subassembly noise coefficient provided by the invention；
Fig. 3 be in Fig. 2 the second base band echo data and the output power of original analog echo-signal obtain it is schematic
Flow chart.
Specific embodiment
As shown in Figure 1, the test macro of high power digital transmitting-receiving subassembly noise coefficient provided by the invention, including it is tested big
Power number transmitting-receiving subassembly, the signal output for exporting analog echo signal being connect with tested high power digital transmitting-receiving subassembly
Device and on-off optical fiber test equipment for controlling analog echo signal, signal output apparatus and optical fiber test equipment connect
It connects；
Optical fiber test equipment does not receive under analog echo signal state for receiving tested high power digital transmitting-receiving subassembly,
First base band echo data of output determines that tested being averaged for high power digital transmitting-receiving subassembly is made an uproar according to the first base band echo data
Acoustical power；
Reception is stated tested high power digital transmitting-receiving subassembly and is received under analog echo signal state, the second base band echo of output
Data determine the output power of signal output apparatus and the signal power of the second base band echo data, according to output power and
Signal power determines signal gain, and determines the three dB bandwidth of base band echo data；
Optical fiber test equipment is also used to determine the noise system of tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Number；
Wherein: PNoiseThe average noise function under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is tested high power digital transmitting-receiving
Component receives the three dB bandwidth under analog echo signal state.
The invention adopts the above technical scheme, the technical effect reached are as follows: not by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, determines the average noise of tested high power digital transmitting-receiving subassembly
Power is determined by the second base band echo data being tested under high power digital transmitting-receiving subassembly reception analog echo signal state
Signal gain and three dB bandwidth can effectively calculate tested high power digital transmitting-receiving subassembly in conjunction with noise coefficient formula
Noise coefficient.The systems and methods solve current high power digital transmitting-receiving subassembly by signal source and optical fiber test equipment
The problem of being matched using high power attenuator, noise coefficient index caused to be unable to measure.Meanwhile the systems and methods have
There is very strong adaptability, can easily be integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Add any hardware device, there is very high practicability.
As an embodiment, signal output apparatus includes the big function connecting with tested high power digital transmitting-receiving subassembly
Rate attenuator and the signal source being connect with high power attenuator and optical fiber test equipment；
Signal source, for exporting the analog echo signal of generation to high power attenuator；
High power attenuator is sent for decaying to analog echo signal, and by the analog echo signal after decaying
To tested high power digital transmitting-receiving subassembly.
As an embodiment, system further includes and signal source, tested high power digital transmitting-receiving subassembly and optical fiber
The frequency synthesizer of test equipment connection；
Frequency synthesizer, when for providing coherent reference clock for signal source, providing sampled reference for optical fiber test equipment
Clock provides local oscillation signal for tested high power digital transmitting-receiving subassembly.
As an embodiment, system further includes connecting with signal source, optical fiber test equipment and frequency synthesizer
Router；
Router, for forwarding optical fiber test equipment to be sent to the control instruction of frequency synthesizer and signal source.
Further, the signal input part connection of the signal output end and high power attenuator of signal source, high-power decaying
The signal output end of device is connect with the signal input part of tested high power digital transmitting-receiving subassembly, and the local oscillation signal of frequency synthesizer is defeated
Outlet is connect with the local oscillation signal input terminal of tested high power digital transmitting-receiving subassembly, the coherent reference clock output of frequency synthesizer
End is connect with the coherent reference clock input of signal source, and sampled reference output terminal of clock and the test optical fiber of frequency synthesizer are set
Standby sampled reference input end of clock connection, the control command output end of optical fiber test equipment and tested high power digital transmitting-receiving group
The control command input terminal of part connects；The echo data output end and optical fiber test equipment of tested high power digital transmitting-receiving subassembly return
Wave data input pin connection, signal source, frequency synthesizer, optical fiber test equipment the network port respectively with the network-side of router
Mouth is bi-directionally connected.
As shown in Fig. 2, the present invention also provides a kind of test methods of high power digital transmitting-receiving subassembly noise coefficient, including
Following steps:
Step S10: it obtains tested high power digital transmitting-receiving subassembly and does not receive first exported under analog echo signal state
Base band echo data determines the average noise power of tested high power digital transmitting-receiving subassembly according to the first base band echo data；
Step S20: it obtains tested high power digital transmitting-receiving subassembly and receives the second base exported under analog echo signal state
Band echo data and the output power of original analog echo-signal determine base band number of echoes according to the second base band echo data
According to signal power and the broadband 3dB；
And the signal gain of base band echo data is determined according to output power and signal power；
Step S30: according to noise coefficient formula, the noise coefficient of tested high power digital transmitting-receiving subassembly is determined.
Invention uses above technical scheme, the technical effect reached are as follows: is not connect by tested high power digital transmitting-receiving subassembly
The first base band echo data under analog echo signal state is received, determines the average noise function of tested high power digital transmitting-receiving subassembly
Rate determines letter by the second base band echo data being tested under high power digital transmitting-receiving subassembly reception analog echo signal state
Number gain and three dB bandwidth can effectively calculate making an uproar for tested high power digital transmitting-receiving subassembly in conjunction with noise coefficient formula
Sonic system number.The systems and methods solve current high power digital transmitting-receiving subassembly and adopt by signal source and optical fiber test equipment
The problem of being matched with high power attenuator, noise coefficient index caused to be unable to measure.Meanwhile the systems and methods have
Very strong adaptability can be easily integrated into high power digital transmitting-receiving subassembly Auto-Test System, without increasing
Any hardware device has very high practicability.
As shown in figure 3, obtaining tested high power digital transmitting-receiving subassembly receives second exported under analog echo signal state
The output power of base band echo data and original analog echo-signal, specifically includes the following steps:
Step S21: analog echo signal is generated；
Step S22: decaying to analog echo signal, and the analog echo signal after decaying is sent to and is tested big function
Rate digital transmitting and receiving component；
Step S23: the second base band echo data that tested high power digital transmitting-receiving subassembly issues is received；
Step S24: the output power of analog echo signal is obtained.
As an embodiment, noise coefficient formula are as follows:
Wherein: PNoiseThe average noise function under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
Specific embodiment is as follows:
Firstly, test device powers on, each composition is partially in normal operating conditions.Optical fiber test equipment passes through router
The network port controls local oscillation signal needed for frequency synthesizer exports tested high power digital transmitting-receiving subassembly output；
Then, optical fiber test equipment is off shape by the output signal that the network port of router controls signal source
State, optical fiber test equipment by control command sending port to tested high power digital transmitting-receiving subassembly send control command, make by
It surveys high power digital transmitting-receiving subassembly and is in receiving state signal, optical fiber test equipment is received simultaneously by its echo data receiving port
The base band echo data for storing tested high power digital transmitting-receiving subassembly passback, calculates no less than 2048 points of average noise power
PNoise；
Optical fiber test equipment sends control command to tested high power digital transmitting-receiving subassembly by control command sending port,
Tested high power digital transmitting-receiving subassembly is set to be in receiving state signal, optical fiber test equipment is controlled by the network port of router
The output signal of signal source is in closed state and controls signal source output power Po, and optical fiber test equipment passes through its echo data
Receiving port receives and stores the base band echo data of tested high power digital transmitting-receiving subassembly passback, calculates and is no less than at 2048 points
Signal power Ps, merges the delta attenuation values A of high power attenuator, and then obtains gain G ain=Ps/Po+A；
Optical fiber test equipment sends control command to tested high power digital transmitting-receiving subassembly by control command sending port,
Tested high power digital transmitting-receiving subassembly is set to be in receiving state signal, optical fiber test equipment is controlled by the network port of router
The output signal of signal source carries out frequency sweep, and optical fiber test equipment is received and stored by its echo data receiving port and is tested big function
The base band echo data of rate digital transmitting and receiving component passback, is calculated three dB bandwidth Bandwidth.
Finally, noise coefficient is calculated using following formula,
Wherein: PNoiseThe average noise function under analog echo signal state is not received for tested high power digital transmitting-receiving subassembly
Rate, k=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal
Signal gain under state, Bandwidth are the 3dB under tested high power digital transmitting-receiving subassembly reception analog echo signal state
Bandwidth.
Above embodiment, which is intended to illustrate the present invention, to be realized or use for professional and technical personnel in the field, to above-mentioned
Embodiment, which is modified, will be readily apparent to those skilled in the art, therefore the present invention includes but is not limited to
Above embodiment, it is any to meet the claims or specification description, meet with principles disclosed herein and novelty,
The method of inventive features, technique, product, fall within the scope of protection of the present invention.
Claims (6)
1. a kind of test macro of high power digital transmitting-receiving subassembly noise coefficient, including tested high power digital transmitting-receiving subassembly,
Be characterized in that, further include connect with the tested high power digital transmitting-receiving subassembly for export analog echo signal signal it is defeated
Device and the on-off optical fiber test equipment for controlling the analog echo signal out, the signal output apparatus with it is described
Optical fiber test equipment connection；
The optical fiber test equipment does not receive the analog echo signal for receiving the tested high power digital transmitting-receiving subassembly
Under state, the first base band echo data of output determines the tested high power digital according to the first base band echo data
The average noise power of transmitting-receiving subassembly；
It receives the tested high power digital transmitting-receiving subassembly to receive under the analog echo signal state, the second base band of output is returned
Wave number evidence determines the output power of the signal output apparatus and the signal power of the second base band echo data, according to
The output power and the signal power determine signal gain, and determine the three dB bandwidth of the base band echo data；
The optical fiber test equipment is also used to determine making an uproar for the tested high power digital transmitting-receiving subassembly according to noise coefficient formula
Sonic system number；
Wherein: PNoiseThe average noise power under analog echo signal state, k are not received for tested high power digital transmitting-receiving subassembly
=1.38 × 10-23J/K, Temp=290K, Gain are signal gain, and Bandwidth is tested high power digital transmitting-receiving subassembly
Receive the three dB bandwidth under analog echo signal state.
2. the test macro of high power digital transmitting-receiving subassembly noise coefficient as described in claim 1, which is characterized in that the letter
Number output device includes the high power attenuator connecting with the tested high power digital transmitting-receiving subassembly and high-power declines with described
Subtract the signal source of device and optical fiber test equipment connection；
The signal source, for exporting the analog echo signal of generation to the high power attenuator；
The high power attenuator, for decaying to the analog echo signal, and by the analog echo signal after decaying
It is sent to the tested high power digital transmitting-receiving subassembly.
3. the test macro of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 2, which is characterized in that the system
System further includes the frequency connecting with the signal source, the tested high power digital transmitting-receiving subassembly and the optical fiber test equipment
Synthesizer；
The frequency synthesizer, for providing coherent reference clock for the signal source, providing and adopt for the optical fiber test equipment
Sample reference clock provides local oscillation signal for the tested high power digital transmitting-receiving subassembly.
4. the test macro of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 3, which is characterized in that the system
System further includes the router connecting with the signal source, the optical fiber test equipment and the frequency synthesizer；
The router, for forwarding the optical fiber test equipment to be sent to the control of the frequency synthesizer and the signal source
Instruction.
5. a kind of test method of high power digital transmitting-receiving subassembly noise coefficient, which comprises the following steps:
Step S10: it obtains tested high power digital transmitting-receiving subassembly and does not receive the first base band exported under analog echo signal state
Echo data determines the average noise function of the tested high power digital transmitting-receiving subassembly according to the first base band echo data
Rate；
Step S20: it obtains tested high power digital transmitting-receiving subassembly and receives the second base band time exported under analog echo signal state
The output power of wave number evidence and original analog echo-signal determines that the base band is returned according to the second base band echo data
The signal power of wave number evidence and the broadband 3dB；
And the signal gain of the base band echo data is determined according to the output power and the signal power；
Step S30: according to noise coefficient formula, the noise coefficient of the tested high power digital transmitting-receiving subassembly is determined；
The noise coefficient formula are as follows:
Wherein: PNoiseThe average noise power under analog echo signal state, k are not received for tested high power digital transmitting-receiving subassembly
=1.38 × 10-23J/K, Temp=290K, Gain are that tested high power digital transmitting-receiving subassembly receives analog echo signal state
Under signal gain, Bandwidth is that tested high power digital transmitting-receiving subassembly receives 3dB band under analog echo signal state
It is wide.
6. the test method of high power digital transmitting-receiving subassembly noise coefficient as claimed in claim 5, which is characterized in that described to obtain
Tested high power digital transmitting-receiving subassembly is taken to receive the second base band echo data exported under analog echo signal state and original
The output power of analog echo signal, specifically includes the following steps:
Step S21: analog echo signal is generated；
Step S22: decaying to the analog echo signal, and the analog echo signal after decaying is sent to described be tested
High power digital transmitting-receiving subassembly；
Step S23: the second base band echo data that the tested high power digital transmitting-receiving subassembly issues is received；
Step S24: the output power of the analog echo signal is obtained.
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| 相控阵雷达接收系统噪声系数分析与测试验证;李维梅 等;《现代雷达》;20161031;第38卷(第10期);全文 |
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