CN201018512Y - Radio communication analog simulation system - Google Patents
Radio communication analog simulation system Download PDFInfo
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- CN201018512Y CN201018512Y CNU2006200494750U CN200620049475U CN201018512Y CN 201018512 Y CN201018512 Y CN 201018512Y CN U2006200494750 U CNU2006200494750 U CN U2006200494750U CN 200620049475 U CN200620049475 U CN 200620049475U CN 201018512 Y CN201018512 Y CN 201018512Y
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Abstract
The utility model discloses a wireless communication simulating system, which comprises a host computer and a channel simulating card. Wherein, the host computer operates a geographic location information system to arrange geographic location for wireless transmission equipment and then realize two-way connection with the channel simulating card through a high-speed bus. The channel simulating card simulates function of channel receiving and transmitting of the wireless transmission equipment to transmit wireless signal characteristic data to the host computer and utilizes channel simulating data received from the host computer to conduct time delay and add error code to information amongst all wireless transmission equipments. The channel simulating card is composed of an onsite programmable gate array module, an interface module and a memory module. The onsite programmable gate array module realizes two-way connection with the wireless transmission equipment and a bus interface module. Moreover, the bus interface module fulfills two-way connection with the memory module and a bus expansion slot. The utility model has the advantages of vivid radio electromagnetic field environment and high joint system test efficiency and effectively saves cost on system research, development and debugging.
Description
Technical field
The utility model relates to the communication simulation technology, specifically in the open-air ultrashort wave radio transmission conditions of experiment lab simulation emulation, realizes the communication of radio transmission apparatus and half radio communication simulation analogue system in kind of networking performance.
Background technology
When radio transmission apparatus is finished prototype design and is carried out the checking of system integration test and system schema, need usually to adopt the method for field trial to simulate actual environment, find and queueing problem by field trial.But, in the external field environment of reality, be difficult to search out the place that can satisfy different terrain, different radio electromagnetic environment simultaneously.In addition, because outfield wireless channel environment complexity, the problem of appearance often can not repeat, and making wastes time and energy the difficulty that searches problem, and some problem is difficult to expose, and will have a strong impact on the debugging progress and the modulation quality of system.
Summary of the invention
The utility model is to finish the problem of prototype design post debugging difficulty in order to solve existing radio transmission apparatus, and provide a kind ofly simulate actual external field environment, satisfy the radio communication simulation analogue system that the radio transmission apparatus debugging is carried out in the place of different terrain, different radio electromagnetic environment simultaneously.
In order to address the above problem, the technical measures that the utility model is taked are: radio communication simulation analogue system, it is characterized in that, comprise a master computer and channel simulator card, described master computer moves geographic position information system, for every radio transmission apparatus the geographical position is set, and receiving frequency information and the reiving/transmitting state that each radio transmission apparatus transmits from bus, this master computer is connected with the channel simulator card is two-way by high-speed bus; The channel simulator snap gauge is intended the channel transceiver function of radio transmission apparatus, and to master computer transmission wireless signal characteristic, and utilize from the channel simulator data of master computer reception, information between each sending and receiving transmission equipment is carried out time delay, added the error code operation, this channel simulator card is realized the repertoire emulation of whole radio transmission apparatus with the radio transmission apparatus baseband portion, and it is by high-speed bus and master computer and radio transmission apparatus exchange wireless signal characteristic;
Described channel simulator card comprises: field programmable gate array module, interface module and memory module; Described field programmable gate array module is connected with radio transmission apparatus is two-way, and is connected with bus interface module is two-way; Described bus interface module is connected with memory is two-way, and is connected with the high-speed bus expansion slot is two-way.
Above-mentioned radio communication simulation analogue system, wherein, the data of described channel simulator card and master computer and radio transmission apparatus exchange comprise the reiving/transmitting state and the carrier frequency of each radio transmission apparatus.
Above-mentioned radio communication simulation analogue system, wherein, described field programmable gate array module comprises transmitting-receiving exchange and information process unit and interface unit, and described transmitting-receiving exchange is connected with information process unit and radio transmission apparatus are two-way, and is connected with interface unit is two-way; Described interface unit is connected with bus interface module is two-way.
Above-mentioned radio communication simulation analogue system, wherein, described transmitting-receiving exchange and information process unit, mainly finish the foundation of the information channel between channel confliction detection, the transmitting/receiving wireless transmission equipment, and calculate each channel estimation value that produces according to main frame exchange message is carried out time delay, error code stack and the operation of code element change width at random; This transmitting-receiving exchange comprises that with information process unit a plurality of shift registers, a channel are connected exchanging array, an error code generator, symbol width generator, a carrier frequency and reiving/transmitting state information extraction unit and a frequency divider at random;
Described frequency divider receives a clock signal, outputs to symbol width generator and error code generator at random behind frequency division respectively;
Described error code generator produces the error code collection of illustrative plates according to the error rate of master computer output for each radio transmission apparatus;
The described generator of symbol width at random is used to produce symbol width;
Described shift register is used for the modulation intelligence that buffer memory is accepted from the radio transmission apparatus base band, and accept from error code generator, the signal of symbol width generator output at random by high speed data bus, also accept delay data signal from master computer by high speed data bus;
Described carrier frequency and reiving/transmitting state information extraction unit are used for extracting corresponding control information from the serial frequency word that digital transmission equipment sends; And send to master computer by carrier frequency and the reiving/transmitting state information that high speed data bus Jiang obtains;
Described channel connects exchanging array and accepts from the address of shift register output and the control signal of carrier frequency and the output of reiving/transmitting state information extraction unit, export a restituted signal to radio transmission apparatus according to reiving/transmitting state information, change the channel connected mode between each radio transmission apparatus.
Above-mentioned radio communication simulation analogue system, wherein, described interface module is carried out parameter configuration by memory module.
Above-mentioned radio communication simulation analogue system, wherein, described memory module is made of the E2ROM memory.
Above-mentioned radio communication simulation analogue system, wherein, described shift register is the first-in first-out shift register.
Because the utility model has been taked above technical scheme, take all factors into consideration emulation degree true to nature and data processing amount, the wireless channel simulation system directly carries out emulation on the baseband signal of transmission equipment, i.e. direct transmission base band in analogue system, factors such as decline on the wireless channel and interference convert the error code of baseband signal to by calculating, but this system's emulation can reflect the influence of wireless channel to transmission equipment and transmission performance thereof to the control timing of transmission equipment inside.
Therefore, utilizing radio communication to simulate analogue system can be in the radio transmission conditions in experiment lab simulation emulation field, flexile landform and radio electromagnetsm environment scene are provided, thereby greatly improve the efficient of system integration test, and can effectively save the cost of system research and development and debugging.
Description of drawings
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the electrical block diagram of the utility model radio communication simulation analogue system.
Fig. 2 is the block diagram of the channel simulator card in the utility model radio communication simulation analogue system.
Fig. 3 is the block diagram of transmitting-receiving exchange and information process unit in the channel simulator card of the utility model radio communication simulation analogue system.
Fig. 4 is the workflow diagram of the utility model radio communication simulation analogue system.
Embodiment
See also Fig. 1.Radio communication simulation analogue system is formed by connecting by high-speed bus PCI and channel simulator card 2 by a master computer 1.In analogue system, the channel simulator cartoon is crossed high-speed bus and master computer exchange wireless signal characteristic, comprising the reiving/transmitting state and the carrier frequency of each radio transmission apparatus 100.
Move geographic position information system on the master computer, and operation wireless channel simulation software.The geographical position of each radio transmission apparatus in characteristic that wireless channel simulation software is sent according to the channel simulator card and the system, know routing information between each radio transmission apparatus by the GIS-Geographic Information System of simulation, thereby calculate the time delay that send channel arrives each receiving equipment, and the estimation error rate.Main frame is sent back to the channel simulator card with the channel information of these estimations by high-speed bus.The position of each radio transmission apparatus can be moved on map as required, with the transmission characteristic of emulation radio transmission apparatus in advancing.
See also Fig. 2.Described channel simulator card 2 comprises: field programmable gate array module 21, interface module 22 and memory module 23; Described field programmable gate array module is connected with radio transmission apparatus is two-way, and is connected with bus interface module is two-way; Described bus interface module is connected with memory is two-way, and with 200 two-way connections of high-speed bus expansion slot.
Described interface module 22 is pci bus sophisticated interface module; This interface module 22 is carried out parameter configuration by memory module 23.Memory module 23 adopts E
2The ROM memory.
Described field programmable gate array module 21 comprises transmitting-receiving exchange and information process unit 211 and interface unit 212, wherein: transmitting-receiving exchange and information process unit 211 and 100 two-way connections of radio transmission apparatus, and with 212 two-way connections of interface unit; Interface unit 212 and 22 two-way connections of bus interface module.
This channel simulator card is connected with the baseband hardware of 8 radio transmission apparatus, and the information spinner of its interface will comprise: carrier frequency, modulation symbol, transmitting-receiving dress attitude.The channel simulator Cali channel transceiver function of transmitting-receiving exchange and information process unit analogue radio transmissions equipment, and to master computer transmission wireless signal characteristic.The channel simulator Cali channel simulator data that receive from master computer are carried out time delay, are added operation such as error code the information between the sending and receiving transmission equipment each.The channel simulator card is realized the repertoire emulation of whole radio transmission apparatus with the radio transmission apparatus baseband portion.
See also Fig. 3.The core of described channel simulator card is transmitting-receiving exchange and information process unit 211, and it comprises that a plurality of shift registers 2111, a channel connect exchanging array 2112, an error code generator 2113, symbol width generator 2114, a carrier frequency and reiving/transmitting state information extraction unit 2115 and a frequency divider 2116 at random.Described frequency divider receives a clock signal, outputs to symbol width generator and error code generator at random behind frequency division respectively; Described error code generator produces the error code collection of illustrative plates according to the error rate of master computer output for each radio transmission apparatus; The described generator of symbol width at random is used to produce symbol width; Described shift register is used for the modulation intelligence that buffer memory is accepted from the radio transmission apparatus base band, and accept from error code generator, the signal of symbol width generator output at random by high speed data bus, also accept delay data signal from master computer by high speed data bus; Described carrier frequency and reiving/transmitting state information extraction unit are used for extracting corresponding control information from the serial frequency word that digital transmission equipment sends; And send to master computer by carrier frequency and the reiving/transmitting state information that high speed data bus Jiang obtains; Described channel connects exchanging array and accepts from the address of shift register output and the control signal of carrier frequency and the output of reiving/transmitting state information extraction unit, export a restituted signal to radio transmission apparatus according to reiving/transmitting state information, change the channel connected mode between each radio transmission apparatus.
The processing of the stack of error code collection of illustrative plates, symbol width and time delay that this transmitting-receiving exchange and information process unit 211 carry out code element to be sent according to information such as the time delay that receives from master computer, error code collection of illustrative plates.Finish mainly that channel confliction detects, the foundation of the information channel between the transmitting/receiving wireless transmission equipment, and calculate each channel estimation value of producing according to main frame and exchange message carried out operations such as time delay, error code stack and code element change width at random.
The channel simulator card is that 8 radio transmission apparatus are opened up the shift register FIFO that a degree of depth is 200 (4-bit * 50) respectively, and each shift register is preserved 1/50bit information (1us), is used for the data message that buffer memory receives from the radio transmission apparatus baseband portion.These 8 groups of shift register FIFO are subjected to the control of three groups of information: time-delay, symbol width and error code collection of illustrative plates at random.Wherein, the delayed data between the sending and receiving stations of master computer estimation is used to control the position of transmitting station FIFO tap; Symbol width and error code collection of illustrative plates first bit of transmitting station FIFO that only is added at random.
Because master computer need obtain the estimation that reiving/transmitting state and definite carrier frequency are used for channel characteristics, so the effect of carrier frequency and reiving/transmitting state information extraction modules is exactly the corresponding information of extraction from the serial frequency word that radio transmission apparatus sends.Wherein, carrier frequency need obtain with the mode of tabling look-up by the relation between frequency control word and actual carrier frequency.Carrier frequency of obtaining and reiving/transmitting state information will send to main control computer by pci bus.The transmission of these information is by the change triggers of transmitting station carrier frequency.Change because each number passes the reiving/transmitting state of radio transmission apparatus, so the connection of the channel between each radio transmission apparatus also is changing.The effect that channel connects the exchanging array module is exactly to change channel connected mode between each radio transmission apparatus according to reiving/transmitting state information.
The error code generator produces the error code collection of illustrative plates according to the error rate that master computer produces for each receives radio transmission apparatus.Generally speaking, the change of carrier frequency will cause the variation of signal fadeout, thereby cause the change of the error rate, so the variation of transmitting station carrier frequency will trigger the work of error code generator.If every jumping 105bit, the error rate 4 * 10
-2The error code that then will occur 4-bit in the 105bit, and the error code generator utilize exactly randomizer be created in 1～105 between equally distributed random number, be used for the position of determining that error code occurs, and with first bit of its receiving platform shift register FIFO that is added to.
For the change at random of analog baseband signal symbol width, intending producing an average is 50, and variance is 16 normal distribution random number rnd, and produce two length and be | 0 of 50-rnd|/2,1 equally distributed binary string rnd1, rnd2 is used to represent that code element two is by fuzzy part.At random the symbol width generator with length 50 [rnd1,0,0 ..., 0, rnd2] carry out XOR with first bit of receiving platform FIFO.
The main task of master computer is the operation geographic position information system, for every radio transmission apparatus the geographical position is set, and receives the information (frequency information and reiving/transmitting state) that every radio transmission apparatus transmits from bus.Master computer at first calculates the time delay of sending out between platform and each receipts platform, the error rate that receives radio transmission apparatus, and these characteristic informations are returned to a radio transmission apparatus by pci bus.Master computer can show each radio transmission apparatus moving in real time and communications status under specific geographical environment.Its workflow as shown in Figure 4.
Analogue system is mainly considered free space loss and diffraction loss, with the intensity of this estimating received signal.Analogue system is estimated loss according to the geography information on the transmitting-receiving node sighting distance (elevation information on range information, the los path).The free space loss is as follows,
L
o＝32.45+201gd(km)+201gf(Mhz) (dB)
Diffraction loss L
fAnd the relation between the Charges Nie Er clearance can't be represented quantitatively, intends adopting the method for tabling look-up to estimate.
Simulated program is according to transmitting power P
T(≈ 36dBm), loss L
o+ L
f, calculate the preceding signal to noise ratio r of demodulation, utilize the error rate of the relational expression calculating receiver between the error rate and the signal to noise ratio, different demodulation schemes has the different error rates one signal to noise ratio relational expression, is demodulated into example with irrelevant 2FSK here:
Simulated program is unit according to the distance estimations signal propagation delay time τ between the sending and receiving radio transmission apparatus with us.
In the utility model radio communication simulation analogue system, operation geographic position information system and wireless channel simulation software on the master computer.The geographical position of each radio transmission apparatus in characteristic that wireless channel simulation software is sent according to the channel simulator card and the system, know routing information between each radio transmission apparatus by the GIS-Geographic Information System of simulation, thereby calculate the time delay that send channel arrives each receiving equipment, and the estimation error rate.Main frame is sent back to the channel simulator card with the channel information of these estimations by high-speed bus.The channel simulator card can be connected with the baseband portion of 8 radio transmission apparatus, and the information spinner of its interface will comprise: carrier frequency, modulation symbol, transmitting-receiving dress attitude.The channel simulator Cali channel transceiver function of FPGA analogue radio transmissions equipment, and to master computer transmission wireless signal characteristic.The channel simulator Cali channel simulator data that receive from master computer are carried out time delay, are added operation such as error code the information between the sending and receiving transmission equipment each.The channel simulator card is realized the repertoire emulation of whole radio transmission apparatus with the radio transmission apparatus baseband portion.The core of channel simulator card is a slice FPGA, the processing of the stack of error code collection of illustrative plates, symbol width and the time delay of code element to be sent being carried out according to information such as the time delay that receives from master computer, error code collection of illustrative plates.
The wireless channel simulation analogue system can be simulated the channel and the baseband transmission characteristic of 8 radio transmission apparatus simultaneously.System can the dynamic analog radio transmission apparatus moves on map track, the various information of display radio transmission equipment in real time: reiving/transmitting state, the error rate, motion track etc.System can be according to the error code and the shake of communication distance, orographic condition and electromagnetic environment Analog Baseband received signal.The time delay of the base band receive channel that system's energy emulation different communication distance causes changes, and precision is 1us.Has the advantage that artificially generated terrain and radio electromagnetsm environment scene are true to nature, system integration test efficient improves and effectively save system research and development and debugging cost.
Claims (5)
1. radio communication is simulated analogue system, it is characterized in that, comprise a master computer and channel simulator card, described master computer moves geographic position information system, for every radio transmission apparatus the geographical position is set, and receiving frequency information and the reiving/transmitting state that each radio transmission apparatus transmits from bus, this master computer is connected with the channel simulator card is two-way by high-speed bus; The channel simulator snap gauge is intended the channel transceiver function of radio transmission apparatus, and to master computer transmission wireless signal characteristic, and utilize from the channel simulator data of master computer reception, information between each sending and receiving transmission equipment is carried out time delay, added the error code operation, this channel simulator card is realized the repertoire emulation of whole radio transmission apparatus with the radio transmission apparatus baseband portion, and it is by high-speed bus and master computer and radio transmission apparatus exchange wireless signal characteristic;
Described channel simulator card comprises: field programmable gate array module, interface module and memory module; Described field programmable gate array module is connected with radio transmission apparatus is two-way, and is connected with bus interface module is two-way; Described bus interface module is connected with memory module is two-way, and is connected with the high-speed bus expansion slot is two-way.
2. radio communication simulation analogue system according to claim 1, it is characterized in that, described field programmable gate array module comprises transmitting-receiving exchange and information process unit and interface unit, described transmitting-receiving exchange is connected with information process unit and radio transmission apparatus are two-way, and is connected with interface unit is two-way; Described interface unit is connected with bus interface module is two-way.
3. radio communication simulation analogue system according to claim 2, it is characterized in that, described transmitting-receiving exchange and information process unit, mainly finish the foundation of the information channel between channel confliction detection, the transmitting/receiving wireless transmission equipment, and calculate each channel estimation value that produces according to main frame exchange message is carried out time delay, error code stack and the operation of code element change width at random; This transmitting-receiving exchange comprises that with information process unit a plurality of shift registers, a channel are connected exchanging array, an error code generator, symbol width generator, a carrier frequency and reiving/transmitting state information extraction unit and a frequency divider at random;
Described frequency divider receives a clock signal, outputs to symbol width generator and error code generator at random behind frequency division respectively;
Described error code generator produces the error code collection of illustrative plates according to the error rate of master computer output for each radio transmission apparatus;
The described generator of symbol width at random is used to produce symbol width;
Described shift register is used for the modulation intelligence that buffer memory is accepted from the radio transmission apparatus base band, and accept from error code generator, the signal of symbol width generator output at random by high speed data bus, also accept delay data signal from master computer by high speed data bus;
Described carrier frequency and reiving/transmitting state information extraction unit are used for extracting corresponding control information from the serial frequency word that digital transmission equipment sends; And send to master computer by carrier frequency and the reiving/transmitting state information that high speed data bus Jiang obtains;
Described channel connects exchanging array and accepts from the address of shift register output and the control signal of carrier frequency and the output of reiving/transmitting state information extraction unit, export a restituted signal to radio transmission apparatus according to reiving/transmitting state information, change the channel connected mode between each radio transmission apparatus.
4. radio communication simulation analogue system according to claim 1 is characterized in that described memory module is by E
2The ROM memory constitutes.
5. radio communication simulation analogue system according to claim 1 is characterized in that described shift register is the first-in first-out shift register.
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| CNU2006200494750U CN201018512Y (en) | 2006-12-25 | 2006-12-25 | Radio communication analog simulation system |
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| CNU2006200494750U CN201018512Y (en) | 2006-12-25 | 2006-12-25 | Radio communication analog simulation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790822A (en) * | 2016-03-04 | 2016-07-20 | 北京航空航天大学 | Link transmission time delay generation method with configurable bit error rate, link transmission time delay generation device and link transmission time delay generation system |
| CN106373458A (en) * | 2016-11-15 | 2017-02-01 | 湖北大学 | Software radio technology-based communication experiment device and experiment method therefor |
| CN110070790A (en) * | 2019-04-11 | 2019-07-30 | 广州大学 | Multi-modal communications demo system based on software radio |
| CN111585675A (en) * | 2020-04-30 | 2020-08-25 | 中国电力科学研究院有限公司 | Power communication channel simulation device and working method thereof |
| CN114362857A (en) * | 2021-12-09 | 2022-04-15 | 中电科思仪科技股份有限公司 | GIS-based channel simulation device and method |
-
2006
- 2006-12-25 CN CNU2006200494750U patent/CN201018512Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790822A (en) * | 2016-03-04 | 2016-07-20 | 北京航空航天大学 | Link transmission time delay generation method with configurable bit error rate, link transmission time delay generation device and link transmission time delay generation system |
| CN105790822B (en) * | 2016-03-04 | 2019-03-05 | 北京航空航天大学 | The configurable chain circuit transmission time delay production method of the bit error rate, apparatus and system |
| CN106373458A (en) * | 2016-11-15 | 2017-02-01 | 湖北大学 | Software radio technology-based communication experiment device and experiment method therefor |
| CN110070790A (en) * | 2019-04-11 | 2019-07-30 | 广州大学 | Multi-modal communications demo system based on software radio |
| CN111585675A (en) * | 2020-04-30 | 2020-08-25 | 中国电力科学研究院有限公司 | Power communication channel simulation device and working method thereof |
| CN111585675B (en) * | 2020-04-30 | 2022-07-26 | 中国电力科学研究院有限公司 | Power communication channel simulation device and working method thereof |
| CN114362857A (en) * | 2021-12-09 | 2022-04-15 | 中电科思仪科技股份有限公司 | GIS-based channel simulation device and method |
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Granted publication date: 20080206 Termination date: 20111225 |