CN104717028A - Wireless link verification system and method based on hardware in loop - Google Patents
Wireless link verification system and method based on hardware in loop Download PDFInfo
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Abstract
The invention provides a wireless link verification system and method based on hardware in loop. The wireless link verification system comprises hardware-in-loop verifying software, multichannel sending/receiving system, a channel emulator, multichannel receiving/sending system and a test result verification module; the hardware-in-loop verifying software is used for configuring a parameter and controlling a test and verification platform; the multichannel sending/receiving system is used for a test system for sending or receiving test data; the channel emulator is used for simulating a real transport environment of a real channel on different occasions; the multichannel receiving/sending system is used for the test system for receiving or sending the test data; the test result verification module is used for comparing the final data received by the multichannel receiving/sending system with the original data sent by the multichannel sending/receiving system. The wireless link verification system and method based on the hardware in loop solve the problem of the virtuality, limitation and the like of an existing software simulation verification mode, and the validity and the accuracy of a test are improved.
Description
Technical field
The invention belongs to the technical field of mobile communication, particularly relate to a kind of wireless link verification system based on hardware in loop and method.
Background technology
Hardware in loop is a kind of powerful method of testing, is also the developing direction of test industry, and it can the work of simulated real system more effectively, thus obtain more real verification the verifying results.Hardware in loop verification method in mobile communication test adopts following technology usually: software and radio technique, frame synchronizing, channel simulator technology, Mutli-thread Programming Technology, automation instrument technology etc.Introduce above-mentioned various technology below in detail.
(1) software and radio technique
Software and radio technique, based on Digital Signal Processing, on the general hardware platform of PLC technology, utilizes software to define, realizes the functions of radio station, specifically comprise the Base-Band Processing etc. of front end receiver, intermediate frequency process and signal.Namely whole radio station is from high frequency, intermediate frequency, base band until control protocol part has all been come by software programming, its core concept is as far as possible near " digital-to-analog " transducer in the use broadband, place of antenna, the digitlization of settling signal as soon as possible, thus make the function of radio station define with software and realize as much as possible.In a word, software and radio technique is a kind of based on digital signal processing chip, take software as the brand-new wireless communication systems structure of core.Along with the expansion of wireless standard (comprising wide area 3G, 2.5G and local 802.11 network), following wireless devices will support multiple air interface and modulation format.Software and radio technique adopts reconfigurable many standard hardware platforms, allows wireless devices have the function of this respect.
(2) frame synchronizing
In each communication standard, having the synchronous method of self, be generally insert to specify reference signal in transmission sequence, then the process carrying out at receiving terminal being correlated with is to obtain the position of synchronous head.But different communication systems, the production method of reference signal and insertion position and have larger difference in the processing method of receiving terminal.This brings inconvenience with regard to giving the test platform of many standards.Therefore need when design test verification platform the synchronous method realizing many standard testings platform considering a kind of simple universal, so as to reduce transceiver distance restriction and reduce medium and long distance test the difficulty brought.
(3) channel simulator technology
Channel simulator technology has become crucial factor in wireless product design.Existing and following wireless communication system needs to realize High Data Rate, high reliability, high stability service quality, and spectral efficient and high-speed mobility, and this just requires to fully understand wireless channel and considers its characteristic.Wireless communication designs with test in, because channel is not in laboratory, but in time, place and geographical conditions change, its complexity and changeability cause multipath fading, channel relevancy, noise and interference etc.Therefore the improvement of channel simulator technology needs high performance DSP, high-quality radio frequency design, and the support of a large amount of embedded softwares and friendly human-computer interaction interface etc. technology, to obtain better performance.
(4) multithreading and multinuclear isolation technics
In communication software platform, use multithreading and multinuclear isolation technics, thus realize splitting the multitask in multiple specific core, improve real-time operation handling property.Such as, data acquisition is carried out and the program showing user interface can use multithreading to realize.Data acquisition, data write disk, analyze data and display analysis data on a user interface, such program can be run by multithreading and multiprocessor computer obtain performance boost.Program module large to operand in radio communication is tested and assessed in real time uses multithreading can improve code operational efficiency, thus shortens running time, strengthens ability of testing and assessing in real time, within the shorter time, completes more task.
(5) automation instrument technology
Automation instrument technology is made up of some Automation Elements, has the automatic technology compared with consummating function.It generally has several functions simultaneously, such as, measure, show, record or measure, control, the function such as warning.Adopt automation instrument technology to be mainly used in the conversion of message form in a test system, convert input signal to output signal, signal can by time domain or frequency domain presentation.The transmission of signal then can be modulated into continuous print analog quantity or discrete digital quantity form.
In order to accuracy, the reliability and ageing of wireless link test can be met better, be applied to mobile communication based in the wireless link verification method of hardware in loop, need every technology such as better fusion software radiotechnics, frame synchronizing, channel simulator technology, Mutli-thread Programming Technology, automation instrument technology.
At present, mainly adopt the method for software emulation to carry out proof of algorithm and assessment at moving communicating field to the system of wireless link.But the system environments under software emulation and truth have certain gap, and reason is as follows:
1, software emulation cannot introduce the impact of hardware condition on communication system
Software emulation thinks that hardware designs ideally can realize software algorithm but in fact, algorithm design is often by the restriction of hardware condition, and software algorithm really arrives hardware implementing and often has a greatly reduced quality.Such as, under actual hardware environment, operand is large especially, require that extra high algorithm often cannot obtain optimum performance to operational precision; Algorithm through sophisticated design is often difficult to resist the interference from the external world; Launching, the algorithm of receiving front-end will consider power, on factors such as the impacts of other hardware elements toward contact.If only carry out system verification and assessment with software emulation, its result easily ignores the problems referred to above, causes the algorithm designed only to rest on theory stage, cannot adapt to the needs of truth.
2, software emulation has certain gap to the simulation of wireless channel and truth
The goal in research of next-generation mobile communications realizes mobile multimedia transmission that is immanent, high-quality, two-forty.In the explanation of International Telecommunication Union's Radiocommunication Sector recently to next generation mobile communication standard, the message transmission rate of 1Gbps is studied realization as the minimum requirement of system.Under the data transmission scenarios of two-forty, what mobile communication system faced is a very severe wireless channel environment, how processing complicated wireless channel has become crucial problem in mobile communication product design.But under current software emulation condition, being obtain by using a large amount of mathematical measure to carry out abstract extraction to wireless channel to the simulation of wireless channel, often a large amount of simplification having been done to wireless channel, also have very large distance with truth.Because software emulation may cause the algorithm designed too simple to the deficiency of wireless channel simulation means, actual complex environment cannot be processed.
Based on above reason, in mobile communication checking with evaluating system, have great importance based on the key technology testing evaluation carried out under true environment on the test platform that the wireless link verification method of hardware in loop designs.The algorithm of design is realizing based on the wireless link validation test platform of hardware in loop by user fast, just can carry out testing evaluation under real wireless link environment, fully effective support is provided for colleges and universities and R&D institution research and develop the new communication of algorithms, also can shorten the technical research cycle largely simultaneously, reduce the cost and risk of new technology, new algorithm, the research and development of products of new standard input, the development of moving communicating field can be advanced to a certain extent.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of wireless link verification system based on hardware in loop and method, realize based on hardware in loop, can support that many algorithms checking and multi-parameter are selected flexibly, proof of algorithm and assessment is carried out relative to the traditional sofeware simulation method of employing, more can meet actual complex communication environment, and obtain more accurate test result.
For achieving the above object and other relevant objects, the invention provides a kind of wireless link verification system based on hardware in loop, at least comprise: system and test result authentication module are received/sent out to the hardware in loop verifying software connected successively, multi-channel transmit/receipts system, channel simulator, multichannel; Wherein, described hardware in loop verifying software is used for configuration parameter and controls test and verification platform;
Described multi-channel transmit/receipts system is used for sending or receiving test data; Described channel simulator is for simulating the transmission environment of the real channel under different scene; System is received/sent out to described multichannel for receiving or sending test data; Described test result authentication module is used for described multichannel to receive/send out the final data of system acceptance and initial data that described multi-channel transmit/receipts system sends contrasts.
According to the above-mentioned wireless link verification system based on hardware in loop, wherein: described hardware in loop verifying software comprises system initialization module and user interface module.
According to the above-mentioned wireless link verification system based on hardware in loop, wherein: system was received/sent out to described multi-channel transmit/receipts system structure with described multichannel is identical, include receipts module and send out a module.
Further, according to the above-mentioned wireless link verification system based on hardware in loop, wherein: described module comprises:
First embedded controller, for remote access and the data generation and the transmission that control each intermodule in a described module;
Arbitrary Waveform Generator, for generation of any modulating baseband data needed for test or waveform;
Digitized instrument, for converting digital simulation amount to discrete data amount;
First frequency converter, for by baseband signal or intermediate-freuqncy signal up-conversion to radiofrequency signal.
Further, according to the above-mentioned wireless link verification system based on hardware in loop, wherein: described receipts module comprises:
Second embedded controller, for remote access and the data receiver and the transmission that control each intermodule in described receipts module;
IF digital process device, the digital signal for receiving, synchronously, after demodulation down-conversion;
Second frequency converter, for being down-converted to intermediate-freuqncy signal or baseband signal by radiofrequency signal.
According to the above-mentioned wireless link verification system based on hardware in loop, wherein: the parameter of configuration includes but not limited to send data file, carrier frequency, transmitting power, bandwidth.
Meanwhile, the present invention also provides a kind of wireless link verification method based on hardware in loop, and it comprises the following steps: start hardware in loop verifying software, carry out system initialization; Parameter configuration is carried out in hardware in loop verifying software; First embedded controller of multi-channel transmit/receipts system is according to configuration parameter, and the Arbitrary Waveform Generator to multi-channel transmit/receipts system sends instruction; Arbitrary Waveform Generator receives signal designation, produces the base band data needed for user or waveform, then sends to the digitized instrument of multi-channel transmit/receipts system; After digitized instrument receives base band data or waveform, digital simulation amount is changed into discrete data amount, send to the first frequency converter of multi-channel transmit/receipts system; After first frequency converter receives information, by the baseband signal of discrete data amount form or intermediate-freuqncy signal is up-converted into radiofrequency signal, by channel simulator send to multichannel receive/send out system; The second embedded controller that system was received/sent out to multichannel carries out Signal reception control, and radiofrequency signal is converted to intermediate-freuqncy signal or baseband signal by the second frequency converter being received/sent out system by multichannel; Signal after frequency conversion sends to multichannel to receive/send out the IF digital process device of system, receives, becomes digital signal after synchronous, demodulation through IF digital process device; The primary signal that digital signal after process is produced by test result authentication module and Arbitrary Waveform Generator contrasts.
According to the above-mentioned wireless link verification method based on hardware in loop, wherein: when carrying out parameter configuration in hardware in loop verifying software, the parameter of configuration includes but not limited to send data file, carrier frequency, transmitting power, bandwidth.
As mentioned above, the wireless link verification system based on hardware in loop of the present invention and method, have following beneficial effect:
(1) can be applied to algorithm research and the system predevelopment phase of wireless communication industry, support User Defined proof of algorithm, can be the communication of algorithms provides hardware based radio frequency to verify at ring;
(2) problems such as virtual, the limitation of existing software emulation verification mode can be solved, improve validity, the accuracy of test.
Accompanying drawing explanation
Fig. 1 is shown as the configuration diagram of the wireless link verification system based on hardware in loop of the present invention;
Fig. 2 is shown as the structural representation that system was received/sent out to multi-channel transmit in the present invention/receipts system or multichannel;
Fig. 3 is shown as the flow chart of the wireless link verification method based on hardware in loop of the present invention.
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Of the present invention be applied to moving communicating field the wireless link verification system based on hardware in loop and method by two receipts/send out system, wireless communication link that a channel simulator forms a hardware in loop.Have employed MIMO technology, simultaneous techniques, cross-platform hardware driving technology, Mutli-thread Programming Technology and multinuclear isolation technics etc. in the implementation procedure of this wireless communication link.Can select to send the input parameters such as file, transmitted power, modulation system, carrier frequency by verification system user of the present invention, real-time transmission radiofrequency signal, simultaneously after the demodulation of receiving terminal down-conversion, I, Q road signal, planisphere etc. after real-time display receives.The present invention can carry out software-hardware co-measuring, and makes hardware in loop can carry out scheme flexible configuration according to user's request by Development of Modular; Testing scheme has good autgmentability simultaneously, can adapt to different test environments and change demand; And hardware in loop is applied in wireless link proof procedure, improves data exchange rate and data processing performance.
Wireless link verification system based on hardware in loop of the present invention and method can meet current radio link checking demand, it builds wireless link test environment by hardware module, and adopts hardware in loop verifying software configuration verification parameter and transmission test data test and verify the radio-frequency receiving-transmitting of wireless link.
With reference to Fig. 1, the wireless link verification system based on hardware in loop of the present invention comprises the hardware in loop verifying software 1, multi-channel transmit/receipts system 2, channel simulator 3, the multichannel that connect successively and receives/send out system 4 and test result authentication module 5.
Wherein, hardware in loop verifying software 1 comprises system initialization module and user interface module, for user's configuration parameter and control test and verification platform.
Wherein, parameter includes but not limited to send data file and associated transmissions parameter, and wherein associated transmissions parameter includes but not limited to carrier frequency, transmitting power, bandwidth.
Multi-channel transmit/receipts system 2 sends for test macro or receives test data, and it comprises sends out module and receives module.
Channel simulator 3 is for simulating the transmission environment of the real channel under different scene.
Multichannel is received/is sent out system 4 and receives for test macro or send test data, and it comprises receives module and sends out module.
Test result authentication module 5 is for contrasting the data of reception and the data of transmission, to verify wireless link.
System 3 was received/sent out to multi-channel transmit/receipts system 2 structure with multichannel is identical, includes and receives module and send out module.See Fig. 2, send out module and comprise:
First embedded controller, for remote access and the data generation and the transmission that control each intermodule in a module.
Arbitrary Waveform Generator, for generation of any modulating baseband data needed for test or waveform.
Digitized instrument, for converting digital simulation amount to discrete data amount.
First frequency converter, for by baseband signal or intermediate-freuqncy signal up-conversion to radiofrequency signal.
Receipts module comprises:
Second embedded controller, for remote access and the data receiver and the transmission that control each intermodule in receipts module.
IF digital process device, the digital signal for receiving, synchronously, after demodulation down-conversion.
Second frequency converter, for being down-converted to intermediate-freuqncy signal or baseband signal by radiofrequency signal.
User controls test platform by the user interface in hardware in loop verifying software and carries out the replaceable testing authentication of algorithm and data processing, adopt hardware in loop pattern, avoid virtual, the limitation of software emulation checking, add the accuracy of testing authentication, validity, this novel testing authentication method can meet the demand that in Current wireless communication, communication of algorithms radio frequency is verified at ring.
With reference to Fig. 3, the wireless link verification method based on hardware in loop of the present invention comprises the following steps:
Step S1, startup hardware in loop verifying software, carry out system initialization;
Step S2, user login hardware in loop verifying software, carry out parameter configuration;
Particularly, parameter includes but not limited to send data file and associated transmissions parameter, and wherein associated transmissions parameter includes but not limited to carrier frequency, transmitting power, bandwidth.
First embedded controller of step S3, multi-channel transmit/receipts system is according to configuration parameter, and the Arbitrary Waveform Generator to multi-channel transmit/receipts system sends instruction;
Step S4, Arbitrary Waveform Generator receive signal designation, produce the base band data needed for user or waveform, then send to the digitized instrument of multi-channel transmit/receipts system;
After step S5, digitized instrument receive base band data or waveform, digital simulation amount is changed into discrete data amount, send to the first frequency converter of multi-channel transmit/receipts system;
After step S6, the first frequency converter receive information, by the baseband signal of discrete data amount form or intermediate-freuqncy signal is up-converted into radiofrequency signal, by channel simulator send to multichannel receive/send out system;
The second embedded controller that system was received/sent out to step S7, multichannel carries out Signal reception control, and radiofrequency signal is converted to intermediate-freuqncy signal or baseband signal by the second frequency converter being received/sent out system by multichannel;
Signal after step S8, frequency conversion sends to multichannel to receive/send out the IF digital process device of system, receives, becomes digital signal after synchronous, demodulation through IF digital process device;
The primary signal that digital signal after step S9, process is produced by test result authentication module and Arbitrary Waveform Generator contrasts, and obtains channel information, thus realizes the checking of wireless link.
Hardware-in-loop simulation is a kind of powerful method of testing, supports that algorithm is to the direct conversion of radiofrequency signal.For user, the whole test macro based on hardware in loop is made up of three major parts: a real-time processor, I/O interface and an operation interface.Real-time processor is the core of hardware-in―the-loop test system, and operation interface for user's parameters and can control test platform, and I/O interface connects the communication path based on hardware in loop.
Particularly, for user, the operating process of hardware-in-loop simulation is as follows:
(1) under operating system (windows 2000 support, Windows XP or Vista does not support Linux), click installation file set up.exe, system completes the installation of radio frequency self-defined communication of algorithms hardware in loop verifying software automatically.
(2) click " beginning → all programs → IQ Test System ", realize the initialization of software, or directly click " shortcut of IQ Test System " on the table, enter the operation that user interface can carry out this software.
(3), after clicking " Login ", eject " Name " and " Password " input frame simultaneously, fill in username and password inside, verify for user right.
(4) input data, mainly comprise the I/Q data file that user is ready for sending, with * .txt for reference format, user oneself can select the path of I/Q data file.Another need arrange associated transmissions parameter, as carrier frequency, transmitting power, bandwidth etc.Whether visual software simulating makes operating personnel can observe oneself I/Q data file by Waveform Graph before launching I/Q data file correct.User can select by Number of CH the port number needing MIMO, has accomplished maximized autonomous configuration like this.
(5) control channel simulator C8, comprises the Channel assignment under C8 varying environment, the feedback of C8 self job information, the state information of C8 and the operation etc. of stopping C8.Being integrated into the successful operation of C8 in simulation software environment, achieves cross-platform operation and controls.
(6) export data, mainly comprise the I/Q data file that user prepares to receive, with * .txt for reference format, user oneself can select the path needing to preserve I/Q data file.Another need arrange correlation reception parameter, as carrier frequency, transmitting power, bandwidth etc.Whether visual software simulating makes operating personnel can observe oneself reception I/Q data file by I Data and Q Datat after receiving I/Q data file correct.User can select by Number of CH the port number needing reception MIMO, has accomplished maximized autonomous configuration like this.
In sum, wireless link verification system based on hardware in loop of the present invention and method can be applied to algorithm research and the system predevelopment phase of wireless communication industry, support User Defined proof of algorithm, can be the communication of algorithms provides hardware based radio frequency to verify at ring; The problems such as virtual, the limitation of present software emulation verification mode can be solved, improve validity, the accuracy of test.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. based on a wireless link verification system for hardware in loop, it is characterized in that, at least comprise: system and test result authentication module are received/sent out to hardware in loop verifying software, multi-channel transmit/receipts system, channel simulator, multichannel;
Wherein, described hardware in loop verifying software is used for user's configuration parameter and controls test and verification platform;
Described multi-channel transmit/receipts system is used for sending or receiving test data;
Described channel simulator is for simulating the transmission environment of the real channel under different scene;
System is received/sent out to described multichannel for receiving or sending test data;
Described test result authentication module is used for described multichannel to receive/send out the final data of system acceptance and initial data that described multi-channel transmit/receipts system sends contrasts.
2. the wireless link verification system based on hardware in loop according to claim 1, is characterized in that: described hardware in loop verifying software comprises system initialization module and user interface module.
3. the wireless link verification system based on hardware in loop according to claim 1, is characterized in that: system was received/sent out to described multi-channel transmit/receipts system structure with described multichannel is identical, includes and receives module and send out module.
4. the wireless link verification system based on hardware in loop according to claim 3, is characterized in that: described module comprises:
First embedded controller, for remote access and the data generation and the transmission that control each intermodule in a described module;
Arbitrary Waveform Generator, for generation of any modulating baseband data needed for test or waveform;
Digitized instrument, for converting digital simulation amount to discrete data amount;
First frequency converter, for by baseband signal or intermediate-freuqncy signal up-conversion to radiofrequency signal.
5. the wireless link verification system based on hardware in loop according to claim 3, is characterized in that: described receipts module comprises:
Second embedded controller, for remote access and the data receiver and the transmission that control each intermodule in described receipts module;
IF digital process device, the digital signal for receiving, synchronously, after demodulation down-conversion;
Second frequency converter, for being down-converted to intermediate-freuqncy signal or baseband signal by radiofrequency signal.
6. the wireless link verification system based on hardware in loop according to claim 1, is characterized in that: the parameter of configuration includes but not limited to send data file, carrier frequency, transmitting power, bandwidth.
7., based on a wireless link verification method for hardware in loop, it is characterized in that: comprise the following steps:
Start hardware in loop verifying software, carry out system initialization;
Parameter configuration is carried out in hardware in loop verifying software;
First embedded controller of multi-channel transmit/receipts system is according to configuration parameter, and the Arbitrary Waveform Generator to multi-channel transmit/receipts system sends instruction;
Arbitrary Waveform Generator receives signal designation, produces the base band data needed for user or waveform, then sends to the digitized instrument of multi-channel transmit/receipts system;
After digitized instrument receives base band data or waveform, digital simulation amount is changed into discrete data amount, send to the first frequency converter of multi-channel transmit/receipts system;
After first frequency converter receives information, by the baseband signal of discrete data amount form or intermediate-freuqncy signal is up-converted into radiofrequency signal, by channel simulator send to multichannel receive/send out system;
The second embedded controller that system was received/sent out to multichannel carries out Signal reception control, and radiofrequency signal is converted to intermediate-freuqncy signal or baseband signal by the second frequency converter being received/sent out system by multichannel;
Signal after frequency conversion sends to multichannel to receive/send out the IF digital process device of system, receives, becomes digital signal after synchronous, demodulation through IF digital process device;
The primary signal that digital signal after process is produced by test result authentication module and Arbitrary Waveform Generator contrasts.
8. the wireless link verification method based on hardware in loop according to claim 7, it is characterized in that: when carrying out parameter configuration in hardware in loop verifying software, the parameter of configuration includes but not limited to send data file, carrier frequency, transmitting power, bandwidth.
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