CN105656572B - The interference free performance test system and method for vehicle-mounted radio-frequency devices based on frequency hopping - Google Patents
The interference free performance test system and method for vehicle-mounted radio-frequency devices based on frequency hopping Download PDFInfo
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- CN105656572B CN105656572B CN201610006336.8A CN201610006336A CN105656572B CN 105656572 B CN105656572 B CN 105656572B CN 201610006336 A CN201610006336 A CN 201610006336A CN 105656572 B CN105656572 B CN 105656572B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of the interference free performance test system and method for the vehicle-mounted radio-frequency devices based on frequency hopping, vehicle-mounted radio-frequency devices include a Frequency hopping transmissions device and a frequency hopping receiver, Frequency hopping transmissions device can continuously transmit the carrier signal of n different frequency every time, and frequency is respectively f1, f2..., fnThe information of baseband signal entrained by the carrier signal of n different frequency is identical, frequency hopping receiver is coupled with Frequency hopping transmissions device, and when the frequency hopping receiver receives the wherein carrier signal of any one frequency, frequency hopping receiver performs the order transmitted by Frequency hopping transmissions device；Including anti-interference test device and anti-interference transmitting antenna；The anti-interference test device is used to produce the interference signal needed for test；The anti-interference transmitting antenna is connected with anti-interference test device, for the interference signal to be sent in the space that the frequency hopping receiver can receive.The present invention can carry out test evaluation to the frequency hopping communications performance of vehicle-mounted radio-frequency devices.
Description
Technical field
The invention belongs to Electro Magnetic Compatibility measuring technology, and in particular to a kind of vehicle-mounted radio-frequency devices based on frequency hopping
Interference free performance test system and method.
Background technology
The extensive utilization of radio frequency products, causes electromagnetic environment to deteriorate, while the probability of interference between electronic product also becomes big,
In order to effectively solve the disturbed caused communication issue of electronic product, there have been a kind of frequency hopping, its operation principle is
The carrier frequency for referring to receiving-transmitting sides transmission signal carries out the communication mode of Discrete Change according to predetermined rule, that is to say, that communication
The middle carrier frequency used by pseudorandom change code control and random jump.For the implementation of the communication technology, " jump
Frequently it is " that one kind carries out the frequency shift keyed communication mode of multifrequency, and the communication system of a kind of yard of control carrier frequency saltus step with code sequence.From
From the point of view of in time domain, Frequency Hopping Signal is the frequency shift keyed signals of a multi-frequency；From frequency domain, the frequency spectrum of Frequency Hopping Signal is one
It is individual very in broadband with unequal interval random jump.Wherein：Frequency hopping controller is core component, including frequency hopping pattern production
The functions such as life, synchronization, Self Adaptive Control；Synthetizer synthesized under the control of frequency hopping controller needed for frequency；Data terminal includes
Error Control is carried out to data.
But for the performance test of frequency hopping, particularly interference free performance is tested, lack correlation test equipment and
Method is, it is necessary to establish related test equipment and method to test the interference free performance of frequency hopping electronic product, assessment hopping scheme
The reasonability and validity of design.
The content of the invention
It is an object of the invention to provide a kind of interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping
And method, test evaluation can be carried out to the frequency hopping communications performance of vehicle-mounted radio-frequency devices.
The interference free performance test system of vehicle-mounted radio-frequency devices of the present invention based on frequency hopping, vehicle-mounted RF device
Part includes a Frequency hopping transmissions device and a frequency hopping receiver, and the Frequency hopping transmissions device can continuously transmit n different frequency every time
Carrier signal, frequency is respectively f1, f2..., fn, the information phase of the baseband signal entrained by the carrier signal of n different frequency
Together, the frequency hopping receiver is coupled with Frequency hopping transmissions device, when the frequency hopping receiver receives wherein any one frequency
During carrier signal, frequency hopping receiver performs the order transmitted by Frequency hopping transmissions device；Including anti-interference test device and anti-interference hair
Penetrate antenna；The anti-interference test device is used to produce the interference signal needed for test；The anti-interference transmitting antenna is done with anti-
Test device connection is disturbed, for the interference signal to be sent in the space that the frequency hopping receiver can receive, with mould
Intend external environment electromagnetic interference phenomenon.
The n is positive integer, and 2≤n≤5.
The interference free performance method of testing of a kind of vehicle-mounted radio-frequency devices based on frequency hopping of the present invention, using such as
The interference free performance test system of vehicle-mounted radio-frequency devices of the present invention based on frequency hopping, comprises the following steps：
Step 1, to Frequency hopping transmissions device and frequency hopping receiver powered operation, Frequency hopping transmissions device is set, makes it every time can be continuous
The carrier signal of n different frequency is sent, frequency is respectively f1, f2..., fn；
Step 2, by observing the working station indicator of frequency hopping receiver judge the reception condition of frequency hopping receiver, when
When the working station indicator of frequency hopping receiver is green, then it represents that the success of frequency hopping receiver reception signal, i.e., vehicle-mounted RF device
Part is working properly；When the working station indicator of frequency hopping receiver is red, then show that frequency hopping receiver reception signal fails,
I.e. vehicle-mounted radio-frequency devices operation irregularity；After Frequency hopping transmissions device and frequency hopping receiver working properly, supplied to anti-interference test device 3
Electricity work；
Step 3, test frequency hopping receiver are in the interference free performance value of different frequency point, respectively W1, W2..., Wn：
3a, the frequency values for the interference signal that anti-interference test device is launched are arranged to fi, i is positive integer, and 1≤i≤
N, intensity level are arranged to P1, the interference signal is launched into space by anti-interference transmitting antenna；
3b, the intensity level for gradually increasing the interference signal that anti-interference test device is launched, until observing frequency hopping receiver
Working station indicator become red by green, then now the intensity level of the interference signal of anti-interference test device transmitting is
Frequency hopping receiver is in Frequency point fiThe first interference free performance value, be designated as Wi'；
3c, the intensity level for gradually decreasing the interference signal that anti-interference test device is launched, until observing frequency hopping receiver
Working station indicator green is become by red, the intensity level of the interference signal of now anti-interference test device transmitting is to jump
Frequency receiver is in Frequency point fiThe second interference free performance value, be designated as Wi”；
3d, take Wi'、Wi" in it is less one as frequency hopping receiver in Frequency point fiInterference free performance value, i.e. Wi；
Step 4, calculate W1, W2..., WnAverage value, the average value is bigger, then shows the frequency hopping skill of vehicle-mounted radio-frequency devices
The interference free performance of art is better, and the average value is smaller, then shows that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is poorer.
The present invention has advantages below：
(1) test assessment can be carried out to the interference free performance of vehicle-mounted radio-frequency devices, while to the property of vehicle-mounted radio-frequency devices
Lifting can be carried out and provide data supporting, ensure that vehicle-mounted radio-frequency devices are stable, reliably run, reduce vehicle-mounted radio-frequency devices
Abnormal signal loses and the situation of deviation；
(2) method of testing of the interference free performance of the frequency hopping provided in the present invention can be applied to the radio frequency of different automobile types
Device, there is very strong versatility, and the anti-interference of the vehicle-mounted radio-frequency devices by method of testing checking frequency hopping
The means of energy are more effective, can be widely applied in vehicle-mounted radio-frequency devices.
Brief description of the drawings
Fig. 1 is the fundamental diagram of vehicle-mounted radio-frequency devices frequency hopping；
Fig. 2 is the theory diagram of the present invention；
Wherein：1st, Frequency hopping transmissions device, 2, frequency hopping receiver, 3, anti-interference test device, 4, anti-interference transmitting antenna.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Vehicle-mounted radio-frequency devices include a Frequency hopping transmissions device 1 and a frequency hopping receiver 2, the letter that Frequency hopping transmissions device 1 is launched
Number frequency values and intensity level are determined by hardware, are eigenvalue.The reception signal frequency values of frequency hopping receiver 2 and receive broadband range by
Hardware determines, is eigenvalue.The Frequency hopping transmissions device 1 can continuously transmit the carrier signal of n different frequency, and adjacent two every time
Interval between individual frequency is identical, and n is positive integer, and 2≤n≤5, frequency are respectively f1, f2..., fn, the load of n different frequency
The information of baseband signal entrained by ripple signal is identical, and the frequency hopping receiver 2 is coupled with Frequency hopping transmissions device 1, when the jump
When frequency receiver 2 receives the wherein carrier signal of any one frequency, frequency hopping receiver 2 is performed transmitted by Frequency hopping transmissions device 1
Order.
The interference free performance test system of vehicle-mounted radio-frequency devices based on frequency hopping as shown in Figure 1, including it is anti-interference
Test device 3 and anti-interference transmitting antenna 4.The anti-interference test device 3 is used to produce the interference signal needed for test；It is sent out
The frequency range for the interference signal penetrated can cover the signal frequency value of the transmitting of Frequency hopping transmissions device 11, the interference signal intensity of transmitting
Scope can also cover the intensity level of the transmitting of Frequency hopping transmissions device 11, and the transmitting of disturbed test device 3 can be resisted according to test request
The frequency values and intensity level of interference signal are configured.The anti-interference transmitting antenna 4 is connected with anti-interference test device 3, is used
In being sent to the interference signal in the space that the frequency hopping receiver 2 can receive, done with environmental test electromagnetism
Disturb phenomenon.
The interference free performance method of testing of a kind of vehicle-mounted radio-frequency devices based on frequency hopping of the present invention, using such as
The interference free performance test system of vehicle-mounted radio-frequency devices of the present invention based on frequency hopping, during test, by Frequency hopping transmissions
The distance between device 1 and frequency hopping receiver 2 are set to 1m.The distance of anti-interference transmitting antenna 4 and frequency hopping receiver 2 is set
It is set to 1m.The method of testing comprises the following steps：
Step 1, to Frequency hopping transmissions device 1 and the powered operation of frequency hopping receiver 2, the working station indicator of frequency hopping receiver 2 it is
Blueness, in holding state；By the shift knob arrange parameter of Frequency hopping transmissions device 1, it is set to continuously transmit n difference every time
The carrier signal of frequency, frequency are respectively f1, f2..., fn。
Step 2, by observing the working station indicator of frequency hopping receiver 2 judge the reception condition of frequency hopping receiver 2,
When the working station indicator of frequency hopping receiver 2 is green, then it represents that the success of the reception signal of frequency hopping receiver 2, i.e., it is vehicle-mounted to penetrate
Frequency device is working properly；When the working station indicator of frequency hopping receiver 2 is red, then show that frequency hopping receiver 2 receives letter
Number failure, i.e., vehicle-mounted radio-frequency devices operation irregularity；After Frequency hopping transmissions device 1 and frequency hopping receiver 2 working properly, to anti-interference survey
3 powered operations are put in trial assembly.
Step 3, test frequency hopping receiver 2 are in the interference free performance value of different frequency point, respectively W1, W2..., Wn：
3a, the frequency values for the interference signal that anti-interference test device 3 is launched are arranged to fi, i is positive integer, and 1≤i≤
N, intensity level are arranged to P1, the interference signal is launched into space by anti-interference transmitting antenna 4.
If the working station indicator of 3b, frequency hopping receiver 2 is green, illustrate that vehicle-mounted radio-frequency devices are working properly, by
The intensity level for the interference signal that cumulative plus anti-interference test device 3 is launched, until observing that the working condition of frequency hopping receiver 2 refers to
Show that lamp becomes red (now vehicle-mounted radio-frequency devices work is abnormal for explanation) by green, then now anti-interference test device 3 is launched
The intensity level of interference signal be frequency hopping receiver 2 in Frequency point fiThe first interference free performance value, be designated as Wi'。
If the working station indicator of 3c, frequency hopping receiver 2 is red, illustrate that vehicle-mounted radio-frequency devices work is abnormal,
Gradually decrease the intensity level for the interference signal that anti-interference test device 3 is launched, the working condition until observing frequency hopping receiver 2
Indicator lamp becomes green (now vehicle-mounted radio-frequency devices are working properly for explanation) by red, and now anti-interference test device 3 is launched
The intensity level of interference signal is frequency hopping receiver 2 in Frequency point fiThe second interference free performance value, be designated as Wi”。
3d, take Wi'、Wi" in it is less one as frequency hopping receiver 2 in Frequency point fiInterference free performance value, i.e. Wi。
Step 4, calculate W1, W2..., WnAverage value, the average value is bigger, then shows the frequency hopping skill of vehicle-mounted radio-frequency devices
The interference free performance of art is better, and the average value is smaller, then shows that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is poorer.
The interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices can be evaluated by test, while is also demonstrated using frequency hopping
The interference free performance test device of vehicle-mounted radio-frequency devices and the validity of method of testing.
The interference free performance of the vehicle-mounted radio-frequency devices of the present invention based on frequency hopping is surveyed by taking n=3 as an example below
Method for testing carries out as described below：
Step 1, to Frequency hopping transmissions device 1 and the powered operation of frequency hopping receiver 2, Frequency hopping transmissions device 1 is set, it is connected every time
Supervention send the carrier signal of 3 different frequencies, and frequency is respectively f1, f2, f3。
Step 2, by observing the working station indicator of frequency hopping receiver 2 judge the reception condition of frequency hopping receiver 2,
When the working station indicator of frequency hopping receiver 2 is green, then it represents that the success of the reception signal of frequency hopping receiver 2, i.e., it is vehicle-mounted to penetrate
Frequency device is working properly；When the working station indicator of frequency hopping receiver 2 is red, then show that frequency hopping receiver 2 receives letter
Number failure, i.e., vehicle-mounted radio-frequency devices operation irregularity；After Frequency hopping transmissions device 1 and frequency hopping receiver 2 working properly, to anti-interference survey
3 powered operations are put in trial assembly.
Step 3, test frequency hopping receiver 2 are in the interference free performance value of different frequency point, respectively W1, W2..., Wn：
The frequency values for the interference signal that anti-interference test device 3 is launched are arranged to f1, intensity level is arranged to P1, this is done
Signal is disturbed by anti-interference transmitting antenna 4 to launch into space.Gradually increase the interference signal that anti-interference test device 3 is launched
Intensity level, until observing that the working station indicator of frequency hopping receiver 2 becomes red by green, then now anti-interference test fills
The intensity level for putting the interference signal of 3 transmittings is frequency hopping receiver 2 in Frequency point f1The first interference free performance value, be designated as W1'。
Gradually decrease the intensity level for the interference signal that anti-interference test device 3 is launched, the working condition until observing frequency hopping receiver 2
Indicator lamp becomes green by red, and now the intensity level for the interference signal that anti-interference test device 3 is launched is frequency hopping receiver 2
In Frequency point f1The second interference free performance value, be designated as W1”.Take W1'、W1" in it is less one as frequency hopping receiver 2 frequency
Rate point f1Interference free performance value, i.e. W1。
The frequency values for the interference signal that anti-interference test device 3 is launched are arranged to f2, intensity level is arranged to P1, according to upper
Mode is stated, is obtained to frequency hopping receiver 2 in Frequency point f2Interference free performance value, i.e. W2。
The frequency values for the interference signal that anti-interference test device 3 is launched are arranged to f3, intensity level is arranged to P1, according to upper
Mode is stated, is obtained to frequency hopping receiver 2 in Frequency point f3Interference free performance value, i.e. W3。
Step 4, calculate W1, W2, W3Average value, the average value is bigger, then shows the frequency hopping of vehicle-mounted radio-frequency devices
Interference free performance is better, and the average value is smaller, then shows that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is poorer.
Claims (2)
1. a kind of interference free performance method of testing of the vehicle-mounted radio-frequency devices based on frequency hopping, vehicle-mounted radio-frequency devices include frequency hopping
Transmitter (1) and frequency hopping receiver (2), the frequency hopping receiver (2) are coupled with Frequency hopping transmissions device (1), it is characterised in that：Adopt
With the interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping, the system includes anti-interference test device (3)
With anti-interference transmitting antenna (4), the anti-interference test device (3) is used to produce the interference signal needed for test；It is described anti-dry
Disturb transmitting antenna (4) to be connected with anti-interference test device (3), for the interference signal to be sent into the frequency hopping receiver
(2) in the space that can be received, with environmental test electromagnetic interference phenomenon；
Its method comprises the following steps：
Step 1, to Frequency hopping transmissions device (1) and frequency hopping receiver (2) powered operation, Frequency hopping transmissions device (1) is set, makes its each energy
The carrier signal of n different frequency is continuously transmitted, frequency is respectively f1, f2..., fn；
Step 2, by observing the working station indicator of frequency hopping receiver (2) judge the reception condition of frequency hopping receiver (2),
When the working station indicator of frequency hopping receiver (2) is green, then it represents that the success of frequency hopping receiver (2) reception signal, i.e. car
It is working properly to carry radio-frequency devices；When the working station indicator of frequency hopping receiver (2) is red, then show frequency hopping receiver
(2) reception signal fails, i.e., vehicle-mounted radio-frequency devices operation irregularity；When Frequency hopping transmissions device (1) and frequency hopping receiver (2) are working properly
Afterwards, anti-interference test device (3) powered operation is given；
Step 3, test frequency hopping receiver (2) are in the interference free performance value of different frequency point, respectively W1, W2..., Wn：
3a, the frequency values of interference signal of anti-interference test device (3) transmitting are arranged to fi, i is positive integer, and 1≤i≤n,
Intensity level is arranged to P1, the interference signal is launched into space by anti-interference transmitting antenna (4)；
3b, the intensity level for gradually increasing the interference signal that anti-interference test device (3) is launched, until observing frequency hopping receiver
(2) working station indicator becomes red by green, then the now intensity of the interference signal of anti-interference test device (3) transmitting
Value is frequency hopping receiver (2) in Frequency point fiThe first interference free performance value, be designated as Wi'；
3c, the intensity level for gradually decreasing the interference signal that anti-interference test device (3) is launched, until observing frequency hopping receiver
(2) working station indicator becomes green by red, now the intensity level of the interference signal of anti-interference test device (3) transmitting
As frequency hopping receiver (2) is in Frequency point fiThe second interference free performance value, be designated as Wi”；
3d, take Wi'、Wi" in it is less one as frequency hopping receiver (2) in Frequency point fiInterference free performance value, i.e. Wi；
Step 4, calculate W1, W2..., WnAverage value, the average value is bigger, then shows the frequency hopping of vehicle-mounted radio-frequency devices
Interference free performance is better, and the average value is smaller, then shows that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is poorer.
2. the interference free performance method of testing of the vehicle-mounted radio-frequency devices according to claim 1 based on frequency hopping, it is special
Sign is：The n is positive integer, and 2≤n≤5.
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| CN106301622B (en) * | 2016-08-31 | 2019-04-02 | 深圳天珑无线科技有限公司 | Interference detection method and Interference Detection system |
| CN115951150A (en) * | 2022-12-31 | 2023-04-11 | 苏州科标检测有限公司 | Wireless radio frequency radiation interference test system |
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| CN101191806B (en) * | 2006-11-29 | 2011-03-30 | 比亚迪股份有限公司 | Apparatus and method for testing automobile electromagnetic sensitivity |
| CN102158892B (en) * | 2011-05-25 | 2013-07-24 | 哈尔滨工业大学 | System and method for testing multi-address interference resisting capacity of ISM (Industry, Scientific and Medicine) frequency band wireless products |
| CN202205090U (en) * | 2011-07-20 | 2012-04-25 | 苏州卓佳自动化设备有限公司 | Vehicle-mounted information monitoring system based on wireless communication technology |
| CN102946292A (en) * | 2012-11-27 | 2013-02-27 | 合肥正弦波无线技术有限公司 | Multi-band quick sweep frequency interference source and signal generation method thereof |
| CN202979012U (en) * | 2012-12-10 | 2013-06-05 | 桂林电子科技大学 | Vehicle-mounted wireless transmission system, vehicle-mounted wireless emitter and vehicle-mounted wireless receiver |
| US8798548B1 (en) * | 2013-03-15 | 2014-08-05 | DGS Global Systems, Inc. | Systems, methods, and devices having databases for electronic spectrum management |
| CN103457632A (en) * | 2013-07-01 | 2013-12-18 | 江苏安智欣电子科技有限公司 | Vehicle frequency hopping communication system |
| CN203466825U (en) * | 2013-09-13 | 2014-03-05 | 牛刚 | Wireless communication device anti-interference performance tester |
| CN103675772B (en) * | 2013-11-26 | 2015-11-04 | 北京宇航系统工程研究所 | A kind of Multifunctional SAR complex electromagnetic environment simulator |
| CN104219005A (en) * | 2014-07-31 | 2014-12-17 | 惠州市凯越电子有限公司 | Vehicle-mounted radio anti-interference testing system and method |
| CN104466433A (en) * | 2014-12-08 | 2015-03-25 | 马瑞利汽车电子(广州)有限公司 | Vehicle-mounted radio frequency receiving antenna device |
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