CN106295430A - Radio-frequency identification reader/writer receiving sensitivity measures system, method and test equipment - Google Patents
Radio-frequency identification reader/writer receiving sensitivity measures system, method and test equipment Download PDFInfo
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- CN106295430A CN106295430A CN201610587388.9A CN201610587388A CN106295430A CN 106295430 A CN106295430 A CN 106295430A CN 201610587388 A CN201610587388 A CN 201610587388A CN 106295430 A CN106295430 A CN 106295430A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
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Abstract
Disclose a kind of radio-frequency identification reader/writer receiving sensitivity and measure system, method and test equipment, this system includes: tested radio-frequency identification reader/writer, is configured to send the modulating coding signal comprising querying command meeting super high frequency radio frequency identification air-interface standard to test equipment；Test equipment, it is configured to after receiving modulating coding signal, by demodulation and decoding, obtain querying command, and generate the tag responses for querying command according to super high frequency radio frequency identification air-interface standard, and return the modulating coding signal comprising tag responses to tested radio-frequency identification reader/writer；Wherein, after tested radio-frequency identification reader/writer is also configured to receive the modulating coding signal of return, this modulating coding signal it is demodulated and decodes, thus obtaining the tag responses of decoding；And calculating device, it is configured to the tag responses of tag responses and the described decoding generated described in comparison to determine the receiving sensitivity of tested radio-frequency identification reader/writer.
Description
Technical field
The present invention relates to field of radio frequency identification, in particular, relate to a kind of radio-frequency identification reader/writer receiving sensitivity and survey
Amount system, method and test equipment.
Background technology
RF identification (RFID) read write line receiving sensitivity refer to read write line when receiving label return signal, necessarily
The minimal power values of the label return signal received under the bit error rate.Receiving sensitivity is the performance indications that read write line is important, it
Size directly affect the performance of read write line, it is therefore desirable to the receiving sensitivity of read write line is tested.
Traditional sensitive analysis method of testing is the data that tab end actively sends regular coding form, and read write line end is real
Time monitor label return data.But under actual working environment, read write line is the active request side as communication, and label is
As the passive answer party of communication, and it is to complete work by meeting the order of relevant air interface agreement and response.Pass
Method of testing and the actual working environment of system have certain difference, reaction radio-frequency identification reader/writer real work that can not be strict
Receiving sensitivity under environment.Additionally, in addition to coordinate test, read write line end needs to adjust self workflow, makes not
Little change.
Therefore, the radio-frequency identification reader/writer receiving sensitivity that there is a need in the art for a kind of improvement measures solution.
Summary of the invention
In one aspect of the invention, it is provided that a kind of radio-frequency identification reader/writer receiving sensitivity measures system, including quilt
Surveying radio-frequency identification reader/writer, it is configured to send to test equipment meet comprising of super high frequency radio frequency identification air-interface standard
The modulating coding signal of querying command；Test equipment, it is configured to after receiving described modulating coding signal, by demodulation
And decoding, it is thus achieved that described querying command, and look into for described according to the generation of described super high frequency radio frequency identification air-interface standard
Ask the tag responses of order, and return the modulating coding signal comprising tag responses to tested radio-frequency identification reader/writer；Wherein, institute
After stating the modulating coding signal that tested radio-frequency identification reader/writer is also configured to receive the return of described test equipment, to this tune
System coding signal is demodulated and decodes, thus obtains the tag responses of decoding；And calculating device, it is configured to ratio
Tag responses and the tag responses of described tested radio-frequency identification reader/writer decoding that more described test equipment generates determine described
The receiving sensitivity of tested radio-frequency identification reader/writer.
In another aspect of the present invention, it is provided that a kind of radio-frequency identification reader/writer receiving sensitivity measuring method, including:
Step 1, is met comprising of super high frequency radio frequency identification air-interface standard by tested radio-frequency identification reader/writer to the transmission of test equipment
The modulating coding signal of querying command；Step 2, test equipment is after receiving described modulating coding signal, by solving harmonic solution
Code, it is thus achieved that described querying command；Step 3, described test equipment generates according to described super high frequency radio frequency identification air-interface standard
For the tag responses of described querying command, and return the modulating-coding letter comprising tag responses to tested radio-frequency identification reader/writer
Number；Step 4, after tested radio-frequency identification reader/writer receives the modulating coding signal that described test equipment returns, compiles this modulation
Code signal is demodulated and decodes, thus obtains the tag responses of decoding；And step 5, raw by relatively described test equipment
The tag responses of the tag responses become and the decoding of described tested radio-frequency identification reader/writer determines described tested radio frequency identification read-write
The receiving sensitivity of device.
It is still another aspect of the present invention to provide a kind of test measured for radio-frequency identification reader/writer receiving sensitivity
Equipment, including: wired communication interface, it is configured to wired connection and receives super from meeting of tested radio-frequency identification reader/writer
The modulating coding signal comprising querying command of high-frequency radio frequency identification air-interface standard；Modem module, it is right to be configured to
Described modulating coding signal is demodulated, thus obtains the coding signal of demodulation；Codec unit, is configured to described demodulation
Coding signal be decoded, thus obtain described querying command；Control unit, is configured to know according to described super high frequency radio frequency
Other air-interface standard generates the tag responses for described querying command；Wherein, described codec unit be additionally configured to right
Described tag responses encodes, thus generates the tag responses of coding；Described modem module is additionally configured to described
The tag responses of coding is modulated, thus generates the modulating coding signal comprising tag responses；Described wired communication interface is also
It is configured to wired connection and returns the modulating coding signal comprising tag responses to tested radio-frequency identification reader/writer.
The measurement that the present invention is directed to radio-frequency identification reader/writer receiving sensitivity proposes a kind of more convenient and makes close to actual
By the solution of environment, it make use of the querying command and correspondence that super high frequency radio frequency identification air-interface standard specifies dexterously
The operating process of tag responses, realize the measurement to read write line receiving sensitivity, simulate read-write the most largely
The real working environment of device.Further, since make use of the agreement operating process that standard specifies, therefore for different types of read-write
Device, as long as it follows described standard, is made without special change, thus facilitates read write line end and fit measurement during test
Join, saved the cost of test operation.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 shows that a kind of according to an embodiment of the invention radio-frequency identification reader/writer receiving sensitivity measures system；
Fig. 2 shows that the test measured for radio-frequency identification reader/writer receiving sensitivity according to an embodiment of the invention sets
Standby；And
Fig. 3 shows a kind of according to an embodiment of the invention radio-frequency identification reader/writer receiving sensitivity measuring method.
Detailed description of the invention
Describe embodiments of the invention with reference to the accompanying drawings in detail.In the following description, many details are elaborated
To make person of ordinary skill in the field be appreciated more fully from the present invention.But, for the technology in art
Personnel are it is evident that the realization of the present invention can not have some in these details.However, it should be understood that this
Bright it is not limited to introduced specific embodiment.On the contrary, it may be considered that implement by the combination in any of following feature and key element
The present invention, regardless of whether whether they relate to different embodiments.Therefore, aspect, feature, embodiment and advantage below is only said
Bright being used and be not construed as key element or the restriction of claim, unless the most clearly proposed.
Referring now to Fig. 1, it illustrates a kind of according to an embodiment of the invention radio-frequency identification reader/writer receiving sensitivity and survey
Amount system 100.As shown in fig. 1, this system 100 includes: tested radio-frequency identification reader/writer 101, tests equipment 102, Yi Jiji
Calculate device 103.
It is aerial that described tested radio-frequency identification reader/writer 101 is configured to meet super high frequency radio frequency identification to the transmission of test equipment
The modulating coding signal comprising querying command of interface standard；
Described test equipment 102 is configured to after receiving described modulating coding signal, by demodulation and decoding, it is thus achieved that
Described querying command, and generate the label for described querying command according to described super high frequency radio frequency identification air-interface standard
Response, and the modulating coding signal comprising tag responses is returned to tested radio-frequency identification reader/writer 101；
Wherein, described tested radio-frequency identification reader/writer 101 is also configured to receive the modulation that described test equipment returns
After coding signal, this modulating coding signal it is demodulated and decodes, thus obtaining the tag responses of decoding；And
Calculate device 103 and be configured to described in comparison tag responses and the knowledge of described tested radio frequency that equipment of testing generates
The tag responses of other read write line decoding determines the receiving sensitivity of described tested radio-frequency identification reader/writer.
Owing to this system make use of the querying command and correspondence that super high frequency radio frequency identification air-interface standard specifies dexterously
The operating process of tag responses, realize the measurement to read write line receiving sensitivity, simulate read-write the most largely
The real working environment of device.Further, since make use of the agreement operating process that standard specifies, therefore for different types of read-write
Device, as long as it follows described standard, is made without special change, thus facilitates read write line end and fit measurement during test
Join, saved the cost of test operation.
Described tested radio-frequency identification reader/writer 101 can be any to realize described super high frequency radio frequency identification air-interface standard
Radio-frequency identification reader/writer.Described tested radio-frequency identification reader/writer 101 can be preferably active read write line, or can also be
Passive type read write line.Described tested radio-frequency identification reader/writer 101 can be first according to described super high frequency radio frequency identification air interface
Standard generates described querying command, then carries out described querying command according to described super high frequency radio frequency identification air-interface standard
Coding, such as, carry out clean cut system pulse position (truncated pulse position, TPP) coding, further according to described superelevation
Frequently the querying command after coding is modulated radio-frequency carrier by RF identification air-interface standard, such as, use double-side band amplitude shift keying
(double-sideband amplitude shift keying, DSB-ASK) or single-side belt amplitude shift keying (double-
Sideband amplitude shift keying, SSB-ASK) mode is modulated, finally the radio-frequency carrier of modulation sent
To described test equipment 102.
Described super high frequency radio frequency identification air-interface standard can be any super high frequency radio frequency identification air-interface standard, example
As, can be Chinese Industrial Standards (CIS), or international standard.Described Chinese Industrial Standards (CIS) can be such as GB/T 29768-2013 " information skill
Art RF identification 800/900MHz air interface protocol ", described international standard can be such as ISO18000-6C.
In certain embodiments, described super high frequency radio frequency identification air-interface standard can be GB/T 29768-2013 " letter
Breath technology RF identification 800/900MHz air interface protocol ", described querying command can be to start querying command, described label
Response can be the label handle comprising 11 randoms number.As known to those skilled, the standard specifies startup to look into
Ask order to be used for starting circulation of once making an inventory, start in querying command and will specify the matching condition circulated that participates in this time making an inventory, with
Shi Zhiding this time make an inventory circulation mark of making an inventory, further specify targeting signal, the reverse link rate factor and codes selection.According to
This standard, starts querying command and includes: command code territory, and its value is 0xA8, represents that this order is for starting querying command；Condition
Territory, it is intended that participate in this time make an inventory circulation matching condition, its value can represent all labels, match flag be 1b label,
Join label and reservation that mark is 0b；Session territory, it is intended that the session number at circulation place of making an inventory, its value can represent S0-S3
Four session number of making an inventory；Aiming field, it is intended that mark of making an inventory, its value can represent to make an inventory and is masked as 0b and 1b；TRext territory, it is intended that
Whether reverse link lead code has targeting signal, and its value can represent that reverse link lead code is without targeting signal and reverse link
Lead code has targeting signal；Reverse link rate is because of subdomain, it is intended that the reverse link rate factor, thus specifies reverse link frequency
Rate, its value can represent the different reverse link factors such as 1/5,3/7,6/11,1,2/5,6/7,12/11,2；Codes selection territory,
It specifies the coded system of reverse link, and its value can represent FM0 coding, Miller code etc.；And check bit.Such as this area skill
Known to art personnel, described GB/T 29768-2013 standard also specify the tab end response mode to this startup querying command.
Specifically, when label be in that preparation, arbitration, response status, and match flag are eligible, mark of making an inventory equal time, label is equal
11 randoms number as label handle and 5 bit check positions should be sent, as the response to startup querying command, and will not
Cause label to make an inventory and indicate reversion.Therefore, the said process of embodiments of the invention is not result in that tab end receives startup and looks into
The situation asking order and be not responding to.
In certain embodiments, the command code territory of described startup querying command can be 0xA8.Described startup inquires about life
The condition field of order can be all labels, and so, the tab end with any match flag all will be to described startup querying command
Respond.In other embodiments, the condition field of described startup querying command can also be other values.
The session territory of described startup querying command can be S0.In other embodiments, session territory can also be S1, S2 or
S3。
The aiming field of described startup querying command can be 0, and so, making an inventory is masked as the label of 0 and could be made that response.According to
Described GB/T 29768-2013 standard, the mark of making an inventory after label powers on is usually 0, therefore starts the aiming field of querying command
It it is 0, it can be ensured that the correct response of tab end.In other embodiments, described aiming field can also be 1.
The TRext territory of described startup querying command can be 1, it means that reverse link lead code with targeting signal,
Thus tag responses is decoded processing by the most tested radio-frequency identification reader/writer.In other embodiments, described TRext territory
Can also be 0, thus reverse link lead code will be without targeting signal.
The reverse link rate of described startup querying command is K=1/5 because of subdomain, it means that reverse link frequencies is
320KHz × 1/5=64KHz.In other embodiments, described reverse link rate because of subdomain can also be other values.
The codes selection territory of described startup querying command is FM0.As known to persons skilled in the art, FM0 coding is logical
Diverse location in over level saltus step window in place represents 0 or 1.Use FM0 coding, beneficially tab end and tested RF identification
The encoding and decoding of read write line process.In other embodiments, described codes selection territory can also be other values.
Returning Fig. 1, described test equipment 102 can be any can to receive described tested RF identification by wired connection
Read write line send the modulating coding signal comprising querying command, it is carried out encoding and decoding process thus obtain described inquiry life
Make, generate tag responses according to described super high frequency radio frequency identification air-interface standard, promise to encode accordingly to this mark
Modulation treatment also returns the equipment of modulating coding signal comprising tag responses to tested radio-frequency identification reader/writer 101.Due to this
Test equipment 102 can realize at least the above function of tab end, and therefore, this test equipment 102 also referred to as simulates label.
This test equipment 102 is preferably the survey measured according to an embodiment of the invention for radio-frequency identification reader/writer receiving sensitivity
Examination equipment.In some embodiments of the invention, it is also possible to consider that this test equipment 102 is real RFID label tag.
Referring now to Fig. 2, it illustrates and survey for radio-frequency identification reader/writer receiving sensitivity according to an embodiment of the invention
The test equipment 102 of amount.As shown in Figure 2, this test equipment 102 includes: wired communication interface 201, modem module
202, codec unit 203, and control unit 204.
Described wired communication interface 201 can be configured to wired connection and receive from tested radio-frequency identification reader/writer
The modulating coding signal comprising querying command meeting super high frequency radio frequency identification air-interface standard of 101.Described wire communication
Interface 201 can be any modulating-coding that can be received by wired connection and meet super high frequency radio frequency identification air-interface standard
The circuit of signal and/or device.Described wired communication interface 201 can be wired to output control device described below
104, and described output control device 104 can be wired to described tested radio-frequency identification reader/writer 101.
In certain embodiments, described super high frequency radio frequency identification air-interface standard is GB/T 29768-2013 " information skill
Art RF identification 800/900MHz air interface protocol ", described querying command is for starting querying command, and the response of described label is bag
Label handle containing 11 randoms number.
In some further embodiments, the condition field of described startup querying command is all labels, and aiming field is 0,
TRext territory is 1, and reverse link rate is K=1/5 because of subdomain, and codes selection territory is FM0.
Described modem module 202 can be configured to the described modulation from tested radio-frequency identification reader/writer 101
Coding signal is demodulated, thus obtains the coding signal of demodulation.Described modem module 202 can be according to described hyperfrequency
The demodulation mode that RF identification air-interface standard is specified, such as, by DSB-ASK or SSB-ASK mode, compile described modulation
Code signal is demodulated.Described modem module 202 can be any can be demodulated signal in a suitable manner and adjust
The circuit of system and/or device.In a kind of example implementations, described modem module 202 can be by field-programmable
Gate array (field programmable gate array, FPGA) realizes.
Codec unit 203 can be configured to be decoded the coding signal of described demodulation, thus looks into described in obtaining
Ask order.The decoding process that described codec unit 203 can be specified according to described super high frequency radio frequency identification air-interface standard,
Such as by TPP mode, the coding signal of described demodulation is decoded.Described codec unit 203 can be any can
The circuit in a suitable manner signal being demodulated and modulate and/or device.In a kind of example implementations, described volume solves
Code unit 203 can be realized by FPGA.
Described control unit 204 can be configured to according to described super high frequency radio frequency identification air-interface standard generate for
The tag responses of described querying command.Described control unit 204 can be additionally configured to control described wired communication interface 201,
Modem module 202, the operation of codec unit 203, thus by codec unit 203, modem module 202, wired
The tag responses generated is encoded by communication interface 201 successively, modulation treatment and transmission.Described control unit 204 is permissible
It is any circuit being capable of described function and/or device.Described control unit 204 can by hardware, software, firmware or its
Combination realizes.In a kind of example implementations, described control unit 204 is by micro controller unit (micro
Controller unit, MCU) realize, described MCU comprises memorizer and is stored in therein described for configuring MCU realization
The software instruction etc. of function.In another kind of exemplary realization, described control unit 204 by microprocessor, memorizer and is deposited
It is stored in the software instruction realizing described function for configuring microprocessor therein to realize.
Described codec unit 203 is additionally configured to encode described tag responses, thus generates the label of coding
Response.The coded system that described codec unit 203 can be specified according to described super high frequency radio frequency identification air-interface standard, example
As by FM0 coded system or Miller code mode, described tag responses encoded.
Described modem module 202 is additionally configured to be modulated the tag responses of described coding, thus generates bag
Modulating coding signal containing tag responses.Described modem module 202 can connect in the air according to described super high frequency radio frequency identification
The modulation system that mouth standard is specified, such as by amplitude shift keying (amplitude shift keying, ASK) or phase-shift keying (PSK)
(phase shift keying, PSK) modulation system, is modulated the tag responses of described coding.
Described wired communication interface 201 is additionally configured to be comprised to the return of tested radio-frequency identification reader/writer by wired connection
The modulating coding signal of tag responses.
Describe above by reference to accompanying drawing and survey for radio-frequency identification reader/writer receiving sensitivity according to an embodiment of the invention
The test equipment 102 of amount, it is noted that above description is merely illustrative rather than limitation of the present invention.At its of the present invention
In his embodiment, this test equipment 102 can have the connection between more, less or different modules, and each module, comprise,
The relations such as function can from described and diagram different.Such as, this test equipment 102 may also include power supply unit, carrier wave shakes
Swing device etc..
Referring back to Fig. 1, described calculating device 103 can be any data processing equipment, such as personal computer etc..Described meter
Calculate device 103 can be by decoding the tag responses of acquisition and described test equipment by described tested radio-frequency identification reader/writer 101
102 tag responses generated are compared to obtain its bit error rate, and according to specifying described tested RF identification under the bit error rate to read
Write the minimum power of the modulated signal comprising tag responses that device 101 receives to determine its receiving sensitivity.
In certain embodiments, described calculating device 103 sets with described tested radio-frequency identification reader/writer 101 and described test
Standby 102 communication connections, described test equipment 102 is additionally configured to be sent to the tag responses of described generation described calculating device
103；And described tested radio-frequency identification reader/writer 101 is additionally configured to the tag responses of described decoding is sent to described calculating
Device 103.So, described calculating device 103 just can calculate the tag responses of described tested radio-frequency identification reader/writer 101 decoding
The bit error rate relative to the tag responses that described test equipment 102 generates.In other embodiments, described test equipment 102 He
The tag responses of described generation and the tag responses of described decoding can also be sent out by described tested radio-frequency identification reader/writer 101 respectively
Deliver to other equipment, and be sent to described calculating device 103 by other equipment and process, or storage sets to the storage associated
Standby, and the data of storage are otherwise transferred to described calculating device 103 process.
In certain embodiments, described tested radio-frequency identification reader/writer 101 and the circulation of described test equipment 102 perform its behaviour
Making, described system 100 also includes:
Output control device 104, its return merit being configured to regulate described test equipment 102 in described circulation performs
Rate,
And wherein, described calculating device 103 is specifically configured to:
Calculate the tag responses of tested radio-frequency identification reader/writer 101 decoding described in each circulation execution relative to described test
The bit error rate of the tag responses that equipment 102 generates；And
According to specifying under the bit error rate, the modulation comprising tag responses that described tested radio-frequency identification reader/writer 101 receives
The minimum power of signal determines the receiving sensitivity of described tested radio-frequency identification reader/writer 101.
Specifically, the number of times that described circulation performs can be specified according to testing requirement.In circulation performs every time, described quilt
Surveying radio-frequency identification reader/writer 101 and send described querying command, described test equipment 102 is returned for the label of described querying command
Response.Meanwhile, in circulation performs every time, described output control device 104 can regulate described tested radio-frequency identification reader/writer
The power of 101 modulated signals comprising tag responses received.In each circulation performs, described output control device 104 can
Gradually to reduce the power of the modulated signal that described tested radio-frequency identification reader/writer 101 receives.So, described calculating device 103
Just can calculate the tag responses of described tested radio-frequency identification reader/writer 101 decoding in every time circulation relative to described test
The bit error rate of the tag responses that equipment 102 generates, it is possible to obtain tested radio-frequency identification reader/writer 101 described in circulation every time and connect
The power of the modulated signal received.Generally, described power is the least, and the most described bit error rate is the biggest.It is therefore intended that maximum allowable error code
Minimum power corresponding to rate, it is simply that the receiving sensitivity of described tested radio-frequency identification reader/writer 101.
Output control device 104 can be known in the art or newly developed any can to control described tested radio frequency and know
The control device of the power of the modulated signal that other read write line 101 receives.Described output control device 104 such as can include adjustable declining
Subtract device, for regulating the power of described modulated signal.Described adjustable attenuator such as may be located at described test equipment 102 to institute
State on the signal transmission path of tested radio-frequency identification reader/writer 101 (or described tested radio-frequency identification reader/writer can also be positioned at
101 on described test equipment 102 path), regulate described tested radio-frequency identification reader/writer 101 by regulation rate of signal attenuation
The power of the described modulated signal received.As known to persons skilled in the art, described output control device 104 also can wrap
Include miscellaneous part, such as circulator etc..Described circulator can be used for described tested radio-frequency identification reader/writer 101 to described test
The signal transmission path of equipment 102 transmits road with the signal of described test equipment 102 to described tested radio-frequency identification reader/writer 101
Footpath is mutually isolated.
In certain embodiments, described tested radio-frequency identification reader/writer 101 and described output control device 104 electrically connect,
Described output control device 104 and described test equipment 102 electrically connect, described tested radio-frequency identification reader/writer 101 and described survey
Examination equipment 102 is in communication with each other by described output control device 104；And described system 100 also includes:
Power detection device 105, it is configured to detect, and described tested radio-frequency identification reader/writer 101 receives comprises label
The power of the modulated signal of response.
Described power detection device 105 can be such as spectrum analyzer, and it such as can be located at described tested RF identification
Between read write line 101 and described output control device 104.
Describe radio-frequency identification reader/writer receiving sensitivity according to an embodiment of the invention above by reference to accompanying drawing and measure system
System 100, it is noted that above description and the merely illustrative rather than limitation of the present invention of diagram.Other realities in the present invention
Executing in example, this system can have the connection between more, less or different parts, and each parts, comprising can with functional relationship
With from described and diagram different.
Referring now to Fig. 3, it illustrates a kind of according to an embodiment of the invention radio-frequency identification reader/writer receiving sensitivity and survey
Metering method.The method can be measured system by the above-mentioned receiving sensitivity of radio-frequency identification reader/writer according to an embodiment of the invention
100 perform, and each step of the method may correspond to the operation of each parts of this system 100.For simplicity's sake, in the following description
Eliminate the part details repeated with above description, therefore can refer to above description and obtain the more detailed understanding to the method.
As shown in Figure 3, the method comprises the following steps:
Step 1, is met super high frequency radio frequency identification air interface mark by tested radio-frequency identification reader/writer to the transmission of test equipment
The accurate modulating coding signal comprising querying command；
Step 2, test equipment is after receiving described modulating coding signal, by demodulation and decoding, it is thus achieved that described inquiry
Order；
Step 3, described test equipment generates for described inquiry according to described super high frequency radio frequency identification air-interface standard
The tag responses of order, and the modulating coding signal comprising tag responses is returned to tested radio-frequency identification reader/writer；
Step 4, after tested radio-frequency identification reader/writer receives the modulating coding signal that described test equipment returns, to this tune
System coding signal is demodulated and decodes, thus obtains the tag responses of decoding；And
Step 5, tag responses and described tested radio-frequency identification reader/writer by relatively described test equipment generates decode
Tag responses determine the receiving sensitivity of described tested radio-frequency identification reader/writer.
In certain embodiments, circulation performs above-mentioned steps 1-4, and described method is further comprising the steps of:
Step 6, regulates the return power of described test equipment in each circulation performs,
And wherein, described step 5 specifically includes:
Sub-step 5.1, calculate each circulation perform described in tested radio-frequency identification reader/writer decoding tag responses relative to
The bit error rate of the tag responses that described test equipment generates；And
Sub-step 5.2, according under specifying the bit error rate, what described tested radio-frequency identification reader/writer received comprises tag responses
The minimum power of modulated signal determine the receiving sensitivity of described tested radio-frequency identification reader/writer.
In such embodiments, circulation performs described step 1-4, step 6, and performs following optional step alternatively
Rapid 7 and step 8, until reaching designated cycle number of times, now start to perform sub-step 5.1 and sub-step 5.2.
In certain embodiments, described method also includes following optional step:
Step 7, the tag responses of described generation is sent to calculate device by described test equipment；
Step 8, the tag responses of described decoding is sent to described calculating device by described tested radio-frequency identification reader/writer；
Wherein, described step 5 is performed by described calculating device.
In certain embodiments, described super high frequency radio frequency identification air-interface standard is GB/T 29768-2013 " information skill
Art RF identification 800/900MHz air interface protocol ", described querying command is for starting querying command, and the response of described label is bag
Label handle containing 11 randoms number.
In certain embodiments, the condition field of described startup querying command is all labels, and aiming field is 0, and TRext territory is
1, reverse link rate is K=1/5 because of subdomain, and codes selection territory is FM0.
Radio-frequency identification reader/writer receiving sensitivity measurement side according to an embodiment of the invention is described above by reference to accompanying drawing
Method, it is noted that above description and the merely illustrative rather than limitation of the present invention of diagram.Other enforcements in the present invention
In example, the method can have the order between more, less or different steps, and each step, comprise permissible with functional relationship
From described and diagram different.Such as, above-mentioned steps 6, step 7, step 8, step 5.1, step 5.2 are optional step,
These steps can not be included in certain embodiments.The most such as, diagram and the description order of above each step might not table
Showing the actual execution sequence of each step, at least some step can perform from illustrating and describe different orders, or can be also
Row performs.The numbering of each step be only for sake of convenience depending on, be not offered as its execution sequence.The most such as, usual multiple step
Can merge into a bigger step, single step can also be split as multiple less step, etc..All these changes
Within the spirit and scope of the present invention.
Although the present invention is disclosed as above by embodiment, but the present invention is not limited to this.Those skilled in the art
The various changes made without departing from the spirit and scope of the present invention and amendment, all should include protection scope of the present invention in, this
The protection domain of invention is only as the criterion with the language of claim and language limited range of equal value thereof.
Claims (10)
1. radio-frequency identification reader/writer receiving sensitivity measures a system, including:
Tested radio-frequency identification reader/writer, it is configured to send to test equipment meet super high frequency radio frequency identification air-interface standard
The modulating coding signal comprising querying command；
Test equipment, it is configured to after receiving described modulating coding signal, by demodulation and decoding, it is thus achieved that described inquiry
Order, and generate the tag responses for described querying command according to described super high frequency radio frequency identification air-interface standard, and
The modulating coding signal comprising tag responses is returned to tested radio-frequency identification reader/writer；
Wherein, described tested radio-frequency identification reader/writer is also configured to receive the modulating-coding letter that described test equipment returns
After number, this modulating coding signal it is demodulated and decodes, thus obtaining the tag responses of decoding；And
Calculating device, it is configured to described in comparison tag responses and the reading of described tested RF identification that equipment of testing generates
Write the tag responses of device decoding to determine the receiving sensitivity of described tested radio-frequency identification reader/writer.
System the most according to claim 1, wherein, described tested radio-frequency identification reader/writer and the circulation of described test equipment are held
Its operation of row, described system also includes:
Output control device, it is configured to regulate, in described circulation performs, the bag that described tested radio-frequency identification reader/writer receives
The power of the modulated signal containing tag responses,
And wherein, described calculating device is specifically configured to:
Calculate the tag responses of tested radio-frequency identification reader/writer decoding described in each circulation execution raw relative to described test equipment
The bit error rate of the tag responses become；And
According to specifying under the bit error rate, the modulated signal comprising tag responses that described tested radio-frequency identification reader/writer receives is
Small-power determines the receiving sensitivity of described tested radio-frequency identification reader/writer.
System the most according to claim 2, wherein, described tested radio-frequency identification reader/writer and described output control device electricity
Connecting, described output control device and the electrical connection of described test equipment, described tested radio-frequency identification reader/writer and described test set
For being in communication with each other by described output control device；And described system also includes:
Power detection device, it is configured to detect the modulation comprising tag responses that described tested radio-frequency identification reader/writer receives
The power of signal.
4. according to the system that in claims 1 to 3, any one is described, wherein, described super high frequency radio frequency identification air interface mark
Standard is GB/T 29768-2013 " information technology RF identification 800/900MHz air interface protocol ", and described querying command is for opening
Dynamic querying command, the response of described label is the label handle comprising 11 randoms number.
System the most according to claim 4, wherein, the condition field of described startup querying command is all labels, aiming field
Being 0, TRext territory is 1, and reverse link rate is K=1/5 because of subdomain, and codes selection territory is FM0.
6. the test equipment measured for radio-frequency identification reader/writer receiving sensitivity, including:
Wired communication interface, is configured to wired connection and receives and penetrate from the hyperfrequency that meets of tested radio-frequency identification reader/writer
Frequency identifies the modulating coding signal comprising querying command of air-interface standard；
Modem module, is configured to be demodulated described modulating coding signal, thus obtains the coding signal of demodulation；
Codec unit, is configured to be decoded the coding signal of described demodulation, thus obtains described querying command；
Control unit, is configured to generate for described querying command according to described super high frequency radio frequency identification air-interface standard
Tag responses；
Wherein, described codec unit is additionally configured to encode described tag responses, thus the label generating coding should
Answer；
Described modem module is additionally configured to be modulated the tag responses of described coding, thus generation comprises label and answers
The modulating coding signal answered；
Described wired communication interface is additionally configured to comprise label by wired connection to the return of tested radio-frequency identification reader/writer should
The modulating coding signal answered.
Test equipment the most according to claim 6, wherein, described super high frequency radio frequency identification air-interface standard is GB/T
29768-2013 " information technology RF identification 800/900MHz air interface protocol ", described querying command is for starting inquiry life
Order, the response of described label is the label handle comprising 11 randoms number.
Test equipment the most according to claim 7, wherein, the condition field of described startup querying command is all labels, mesh
Mark territory is 0, and TRext territory is 1, and reverse link rate is K=1/5 because of subdomain, and codes selection territory is FM0.
9. a radio-frequency identification reader/writer receiving sensitivity measuring method, including:
Step 1, is met super high frequency radio frequency identification air-interface standard by tested radio-frequency identification reader/writer to the transmission of test equipment
Comprise the modulating coding signal of querying command；
Step 2, test equipment is after receiving described modulating coding signal, by demodulation and decoding, it is thus achieved that described querying command；
Step 3, described test equipment generates for described querying command according to described super high frequency radio frequency identification air-interface standard
Tag responses, and return to tested radio-frequency identification reader/writer and comprise the modulating coding signal of tag responses；
Step 4, after tested radio-frequency identification reader/writer receives the modulating coding signal that described test equipment returns, compiles this modulation
Code signal is demodulated and decodes, thus obtains the tag responses of decoding；And
Step 5, by tag responses and the mark of described tested radio-frequency identification reader/writer decoding of relatively described test equipment generation
Sign response and determine the receiving sensitivity of described tested radio-frequency identification reader/writer.
Method the most according to claim 9, wherein, described super high frequency radio frequency identification air-interface standard is GB/T
29768-2013 " information technology RF identification 800/900MHz air interface protocol ", described querying command is for starting inquiry life
Order, the response of described label is the label handle comprising 11 randoms number.
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