CN105656572A - Anti-jamming performance test system and method for vehicular radio frequency device based on frequency hopping technology - Google Patents
Anti-jamming performance test system and method for vehicular radio frequency device based on frequency hopping technology Download PDFInfo
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- CN105656572A CN105656572A CN201610006336.8A CN201610006336A CN105656572A CN 105656572 A CN105656572 A CN 105656572A CN 201610006336 A CN201610006336 A CN 201610006336A CN 105656572 A CN105656572 A CN 105656572A
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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
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- 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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Abstract
The invention discloses an anti-jamming performance test system and method for a vehicular radio frequency device based on the frequency hopping technology. The vehicular radio frequency device comprises a frequency hopping transmitter and a frequency hopping receiver, the frequency hopping transmitter can continuously send n carrier signals with different frequencies at any time, the frequencies are respectively f1, f2, ..., fn, the information of baseband signals carried by the n carrier signals with different frequencies is the same time, the frequency hopping receiver is coupled with the frequency hopping transmitter, and when the frequency hopping receiver receives the carrier signal of any frequency, the frequency hopping receiver executes a command sent by the frequency hopping transmitter; the anti-jamming performance test system comprises an anti-jamming test apparatus and an anti-jamming transmitting antenna; the anti-jamming test apparatus is used for generating an interference signal necessary for the test; and the anti-jamming transmitting antenna is connected with the anti-jamming test apparatus for sending the interference signal to a space in which the frequency hopping receiver can receive the interference signal. The anti-jamming performance test system and method disclosed by the invention can be used for testing and evaluating the frequency hopping communication performance of the vehicular radio frequency device.
Description
Technical field
The invention belongs to Electro Magnetic Compatibility measuring technology, be specifically related to the interference free performance test system and method for a kind of vehicle-mounted radio-frequency devices based on frequency hopping.
Background technology
The extensive utilization of radio frequency products, cause that electromagnetic environment worsens, probability of interference between electronic product also becomes big simultaneously, in order to enable effectively to solve the disturbed communication issue caused of electronic product, occur as soon as a kind of frequency hopping, its operation principle refers to that the carrier frequency of receiving-transmitting sides transmission signal carries out the communication mode of Discrete Change according to predetermined rule, say, that the carrier frequency used in communication is random jump by the control of pseudorandom change code. From the implementation of communication technology, " frequency hopping " is that one code sequence carries out the frequency shift keyed communication mode of multifrequency, is also the communication system of a kind of yard of control carrier frequency saltus step. Time domain, Frequency Hopping Signal is a multifrequency frequency shift keyed signals; From frequency domain, the frequency spectrum of Frequency Hopping Signal be one in very broadband with unequal interval random jump. Wherein: frequency hopping controller is core component, the function such as including frequency hopping pattern generation, synchronization, Self Adaptive Control; Synthetizer synthesizes required frequency under the control of frequency hopping controller; Data terminal comprises data is carried out Error Control.
But the performance test for frequency hopping, particularly interference free performance test, lack relevant test equipment and method, it is necessary to set up relevant test equipment and method tests the interference free performance of frequency hopping electronic product, the reasonability of assessment hopping scheme design and effectiveness.
Summary of the invention
It is an object of the invention to provide the interference free performance of a kind of vehicle-mounted radio-frequency devices based on frequency hopping test system and method, the frequency hopping communications performance of vehicle-mounted radio-frequency devices can be carried out test evaluation.
The interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping of the present invention, vehicle-mounted radio-frequency devices includes a Frequency hopping transmissions device and a frequency hopping receiver, described Frequency hopping transmissions device can continuously transmit the carrier signal of n different frequency every time, and frequency is f respectively1, f2..., fnThe information of the baseband signal entrained by the carrier signal of n different frequency is identical, described frequency hopping receiver and Frequency hopping transmissions device are coupled, and when described frequency hopping receiver receives the carrier signal of wherein any one frequency, frequency hopping receiver performs the order that Frequency hopping transmissions device sends;Including anti-interference test device and anti-interference transmitting antenna; The interference signal that described anti-interference test device is required for producing test; Described anti-interference transmitting antenna is connected with anti-interference test device, for being sent in the space that described frequency hopping receiver can receive by described interference signal, with environmental test electromagnetic interference phenomenon.
Described 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, adopts the interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping as described in the present invention, comprises the following steps:
Step 1, to Frequency hopping transmissions device and frequency hopping receiver powered operation, Frequency hopping transmissions device is set so that it is continuously transmitting the carrier signal of n different frequency, frequency is f respectively every time1, f2..., fn;
Step 2, judge the reception condition of frequency hopping receiver by observing the working station indicator of frequency hopping receiver, when the working station indicator of frequency hopping receiver be green, then it represents that frequency hopping receiver receives signal successfully, and namely vehicle-mounted radio-frequency devices is working properly; When the working station indicator of frequency hopping receiver is red, then show that frequency hopping receiver receives Signal Fail, i.e. vehicle-mounted radio-frequency devices operation irregularity; When Frequency hopping transmissions device and frequency hopping receiver working properly after, to anti-interference test device 3 powered operation;
Step 3, test frequency hopping receiver are at the interference free performance value of different frequency point, respectively W1, W2..., Wn:
3a, the frequency values disturbing signal launched by anti-interference test device are set to fi, i is positive integer, and 1��i��n, and intensity level is set to P1, this interference signal is launched to space by anti-interference transmitting antenna;
3b, be gradually increased anti-interference test device launch interference signal intensity level, until observing that the working station indicator of frequency hopping receiver is become red by green, then the intensity level of the interference signal that now anti-interference test device is launched is frequency hopping receiver at Frequency point fiThe first interference free performance value, be designated as Wi';
3c, gradually decrease anti-interference test device launch interference signal intensity level, until observing that the working station indicator of frequency hopping receiver is become green by redness, the intensity level of the interference signal that now anti-interference test device is launched is frequency hopping receiver at Frequency point fiThe second interference free performance value, be designated as Wi";
3d, take Wi'��Wi" in less one as frequency hopping receiver at Frequency point fiInterference free performance value, i.e. Wi;
Step 4, calculating W1, W2..., WnMeansigma methods, this meansigma methods is more big, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more good, and this meansigma methods is more little, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more poor.
The invention have the advantages that
(1) interference free performance of vehicle-mounted radio-frequency devices can be carried out test assessment, the performance of vehicle-mounted radio-frequency devices is carried out lifting simultaneously and provide data supporting, ensure that vehicle-mounted radio-frequency devices is stable, run reliably, decrease the situation of vehicle-mounted radio-frequency devices abnormal signal loss and deviation;
(2) method of testing of the interference free performance of the frequency hopping provided in the present invention can be applicable to the radio-frequency devices of different automobile types, there is very strong versatility, and relatively more effective by the means of the interference free performance of the vehicle-mounted radio-frequency devices of this method of testing checking frequency hopping, can be widely applied in vehicle-mounted radio-frequency devices.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of vehicle-mounted radio-frequency devices frequency hopping;
Fig. 2 is principles of the invention block diagram;
Wherein: 1, Frequency hopping transmissions device, 2, frequency hopping receiver, 3, anti-interference test device, 4, anti-interference transmitting antenna.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Vehicle-mounted radio-frequency devices includes a Frequency hopping transmissions device 1 and a frequency hopping receiver 2, and signal frequency value and intensity level that Frequency hopping transmissions device 1 is launched are determined by hardware, for eigenvalue. Frequency hopping receiver 2 receives signal frequency value and reception broadband range is determined by hardware, for eigenvalue. Described Frequency hopping transmissions device 1 can continuously transmit the carrier signal of n different frequency every time, and the interval between adjacent two frequencies is identical, and n is positive integer, and 2��n��5, and frequency is f respectively1, f2..., fnThe information of the baseband signal entrained by the carrier signal of n different frequency is identical, described frequency hopping receiver 2 is coupled with Frequency hopping transmissions device 1, and when described frequency hopping receiver 2 receives the carrier signal of wherein any one frequency, frequency hopping receiver 2 performs the order that Frequency hopping transmissions device 1 sends.
The interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping as shown in Figure 1, including anti-interference test device 3 and anti-interference transmitting antenna 4. The interference signal that described anti-interference test device 3 is required for producing test; The frequency range of the interference signal of its transmitting can cover the signal frequency value that Frequency hopping transmissions device 11 is launched, the interference signal intensity scope launched also can cover the intensity level that Frequency hopping transmissions device 11 is launched, and can resist, according to test request, the interference frequency values of signal that disturbed test device 3 launches and intensity level is configured. Described anti-interference transmitting antenna 4 is connected with anti-interference test device 3, for being sent in the space that described frequency hopping receiver 2 can receive by described interference signal, with environmental test electromagnetic interference 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, adopt the interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping as described in the present invention, during test, the distance between Frequency hopping transmissions device 1 and frequency hopping receiver 2 is set to 1m. The distance of anti-interference transmitting antenna 4 with frequency hopping receiver 2 is set to 1m. This method of testing comprises the following steps:
Step 1, to Frequency hopping transmissions device 1 and frequency hopping receiver 2 powered operation, frequency hopping receiver 2 working station indicator is blue, is in holding state; Parameter is set by the shift knob of Frequency hopping transmissions device 1 so that it is continuously transmitting the carrier signal of n different frequency, frequency is f respectively every time1, f2..., fn��
Step 2, judge the reception condition of frequency hopping receiver 2 by observing the working station indicator of frequency hopping receiver 2, when the working station indicator of frequency hopping receiver 2 is green, then representing that frequency hopping receiver 2 receives signal success, namely vehicle-mounted radio-frequency devices is working properly; When the working station indicator of frequency hopping receiver 2 is red, then show that frequency hopping receiver 2 receives Signal Fail, i.e. vehicle-mounted radio-frequency devices operation irregularity; When Frequency hopping transmissions device 1 and frequency hopping receiver 2 working properly after, to anti-interference test device 3 powered operation.
Step 3, test frequency hopping receiver 2 are at the interference free performance value of different frequency point, respectively W1, W2..., Wn:
3a, the frequency values disturbing signal launched by anti-interference test device 3 are set to fi, i is positive integer, and 1��i��n, and intensity level is set to P1, this interference signal is launched to 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 is working properly, it is gradually increased the intensity level of the interference signal that anti-interference test device 3 is launched, until observing that the working station indicator of frequency hopping receiver 2 is become red (illustrating that now vehicle-mounted radio-frequency devices work is abnormal) by green, then the intensity level of the interference signal that now anti-interference test device 3 is launched is frequency hopping receiver 2 at 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 the work of vehicle-mounted radio-frequency devices is abnormal, gradually decrease the intensity level of the interference signal that anti-interference test device 3 is launched, until observing that the working station indicator of frequency hopping receiver 2 is become green (illustrating that now vehicle-mounted radio-frequency devices is working properly) by redness, the intensity level of the interference signal that now anti-interference test device 3 is launched is frequency hopping receiver 2 at Frequency point fiThe second interference free performance value, be designated as Wi����
3d, take Wi'��Wi" in less one as frequency hopping receiver 2 at Frequency point fiInterference free performance value, i.e. Wi��
Step 4, calculating W1, W2..., WnMeansigma methods, this meansigma methods is more big, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more good, and this meansigma methods is more little, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more poor. By testing the interference free performance of the frequency hopping that can evaluate vehicle-mounted radio-frequency devices, also demonstrate the interference free performance test device of the vehicle-mounted radio-frequency devices using frequency hopping and the effectiveness of method of testing simultaneously.
For n=3, the interference free performance method of testing based on the vehicle-mounted radio-frequency devices of frequency hopping of the present invention is carried out as described below below:
Step 1, to Frequency hopping transmissions device 1 and frequency hopping receiver 2 powered operation, Frequency hopping transmissions device 1 is set so that it is continuously transmitting the carrier signal of 3 different frequencies, frequency is f respectively every time1, f2, f3��
Step 2, judge the reception condition of frequency hopping receiver 2 by observing the working station indicator of frequency hopping receiver 2, when the working station indicator of frequency hopping receiver 2 is green, then representing that frequency hopping receiver 2 receives signal success, namely vehicle-mounted radio-frequency devices is working properly; When the working station indicator of frequency hopping receiver 2 is red, then show that frequency hopping receiver 2 receives Signal Fail, i.e. vehicle-mounted radio-frequency devices operation irregularity; When Frequency hopping transmissions device 1 and frequency hopping receiver 2 working properly after, to anti-interference test device 3 powered operation.
Step 3, test frequency hopping receiver 2 are at the interference free performance value of different frequency point, respectively W1, W2..., Wn:
The frequency values of the interference signal launched by anti-interference test device 3 is set to f1, intensity level is set to P1, this interference signal is launched to space by anti-interference transmitting antenna 4. It is gradually increased the intensity level of the interference signal that anti-interference test device 3 is launched, until observing that the working station indicator of frequency hopping receiver 2 is become red by green, then the intensity level of the interference signal that now anti-interference test device 3 is launched is frequency hopping receiver 2 at Frequency point f1The first interference free performance value, be designated as W1'. Gradually decrease the intensity level of the interference signal that anti-interference test device 3 is launched, until observing that the working station indicator of frequency hopping receiver 2 is become green by redness, the intensity level of the interference signal that now anti-interference test device 3 is launched is frequency hopping receiver 2 at Frequency point f1The second interference free performance value, be designated as W1".Take W1'��W1" in less one as frequency hopping receiver 2 at Frequency point f1Interference free performance value, i.e. W1��
The frequency values of the interference signal launched by anti-interference test device 3 is set to f2, intensity level is set to P1, in the manner described above, frequency hopping receiver 2 must be given at Frequency point f2Interference free performance value, i.e. W2��
The frequency values of the interference signal launched by anti-interference test device 3 is set to f3, intensity level is set to P1, in the manner described above, frequency hopping receiver 2 must be given at Frequency point f3Interference free performance value, i.e. W3��
Step 4, calculating W1, W2, W3Meansigma methods, this meansigma methods is more big, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more good, and this meansigma methods is more little, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more poor.
Claims (3)
1. the interference free performance based on the vehicle-mounted radio-frequency devices of frequency hopping tests system, vehicle-mounted radio-frequency devices includes a Frequency hopping transmissions device (1) and a frequency hopping receiver (2), described Frequency hopping transmissions device (1) can continuously transmit the carrier signal of n different frequency every time, and frequency is f respectively1, f2..., fnThe information of the baseband signal entrained by the carrier signal of n different frequency is identical, described frequency hopping receiver (2) and Frequency hopping transmissions device (1) are coupled, when described frequency hopping receiver (2) receives the carrier signal of wherein any one frequency, frequency hopping receiver (2) performs the order that Frequency hopping transmissions device (1) sends; It is characterized in that: include anti-interference test device (3) and anti-interference transmitting antenna (4); The interference signal that described anti-interference test device (3) is required for producing test; Described anti-interference transmitting antenna (4) is connected with anti-interference test device (3), for described interference signal is sent in the space that described frequency hopping receiver (2) can receive, with environmental test electromagnetic interference phenomenon.
2. the interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping according to claim 1, it is characterised in that: described n is positive integer, and 2��n��5.
3. the interference free performance method of testing based on the vehicle-mounted radio-frequency devices of frequency hopping, it is characterised in that: adopt the interference free performance test system of the vehicle-mounted radio-frequency devices based on frequency hopping as claimed in claim 1 or 2, comprise 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 so that it is continuously transmitting the carrier signal of n different frequency, frequency is f respectively every time1, f2..., fn;
Step 2, judge the reception condition of frequency hopping receiver (2) by observing the working station indicator of frequency hopping receiver (2), when the working station indicator of frequency hopping receiver (2) is green, then representing that frequency hopping receiver (2) receives signal success, namely vehicle-mounted radio-frequency devices is working properly; When the working station indicator of frequency hopping receiver (2) is red, then show that frequency hopping receiver (2) receives Signal Fail, i.e. vehicle-mounted radio-frequency devices operation irregularity; When Frequency hopping transmissions device (1) and frequency hopping receiver (2) working properly after, to anti-interference test device (3) powered operation;
Step 3, test frequency hopping receiver (2) are at the interference free performance value of different frequency point, respectively W1, W2..., Wn:
3a, the frequency values disturbing signal anti-interference test device (3) launched are set to fi, i is positive integer, and 1��i��n, and intensity level is set to P1, this interference signal is launched to space by anti-interference transmitting antenna (4);
3b, it is gradually increased the intensity level of the interference signal that anti-interference test device (3) launches, until observing that the working station indicator of frequency hopping receiver (2) is become red by green, then the intensity level of the interference signal that now anti-interference test device (3) is launched is frequency hopping receiver (2) at Frequency point fiThe first interference free performance value, be designated as W 'i;
3c, gradually decrease the intensity level of the interference signal that anti-interference test device (3) launches, until observing that the working station indicator of frequency hopping receiver (2) is become green by redness, the intensity level of the interference signal that now anti-interference test device (3) is launched is frequency hopping receiver (2) at Frequency point fiThe second interference free performance value, be designated as W "i;
3d, take W 'i��W��iIn less one as frequency hopping receiver (2) at Frequency point fiInterference free performance value, i.e. Wi;
Step 4, calculating W1, W2..., WnMeansigma methods, this meansigma methods is more big, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more good, and this meansigma methods is more little, then show that the interference free performance of the frequency hopping of vehicle-mounted radio-frequency devices is more poor.
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| CN118226170A (en) * | 2024-03-29 | 2024-06-21 | 岚图汽车科技有限公司 | Electromagnetic compatibility test method, device, equipment and storage medium |
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| CN105656572B (en) | 2018-03-02 |
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