CN102043151A - Mobile terminal and method for positioning based on radio frequency identification - Google Patents
Mobile terminal and method for positioning based on radio frequency identification Download PDFInfo
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- CN102043151A CN102043151A CN2009101781924A CN200910178192A CN102043151A CN 102043151 A CN102043151 A CN 102043151A CN 2009101781924 A CN2009101781924 A CN 2009101781924A CN 200910178192 A CN200910178192 A CN 200910178192A CN 102043151 A CN102043151 A CN 102043151A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
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Abstract
The invention provides a mobile terminal and a method for positioning based on radio frequency identification (RFID). The mobile terminal comprises a microwave antenna, a radio frequency identification analog front end module connected with the microwave antenna, a positioning processing module connected with the microwave antenna, and a digital baseband processing module connected with the radio frequency identification analog front end module and the positioning processing module respectively. The positioning method comprises that: a first terminal transmits a radio frequency signal for requesting positioning; the first terminal receives a radio frequency signal which is returned by a second terminal and is used for responding to positioning; the first terminal acquires corresponding power value, phase and time according to the radio frequency signal for requesting positioning and/or the radio frequency signal for responding to positioning; and the first terminal acquires positioning information according to the power, phase and time. Therefore, the mobile terminal and the method for positioning based on RFID can realize real-time positioning function and accurately and rapidly determine a relative position of the opposite side in an electromagnetic induction range.
Description
Technical field
The present invention relates to the mobile communication positioning field, relate in particular to a kind of portable terminal and localization method that is used to locate based on radio-frequency (RF) identification (Radio Frequency Identification is called for short RFID).
Background technology
Existing terminal positioning mode has following several:
First kind of mode is GPS (GPS), but because GPS belongs to satnav, has intrinsic bearing accuracy problem when carrying out indoor positioning, so must solve the indoor positioning problem by other location technologies.
The second way is the infrared ray locator meams, and for example the Active Badge system of Olivetti research laboratory adopts infrared technology to realize indoor positioning.But short this two big major defect of straight line sighting distance and transmission range makes the poor effect of its indoor positioning.
The third mode is that IEEE802.11:RADAR is a kind of indoor locating system based on radio frequency, adopts 802.11 networks of standard to position for the space.The mode that this system's employing experience test and signal propagation model combine, be easy to install, need seldom base station, can adopt identical bottom wireless network architecture, but, up to the present, most of bearing accuracy of the system of 802.11 technology of using fails to reach desirable yardstick, system's resultnat accuracy height.
The 4th kind of mode is the ultrasonic locating mode; For example cricket location back-up system Cricket Location Support System and active bat Active Bat are two exemplary that adopt ultrasonic locating, and they adopt the ultrasound wave delay time signal to position.Though whole bearing accuracy is higher, need a large amount of bottom hardware facility investments, cost is too high.
At present, radio-frequency (RF) identification is a kind of contactless automatic identification technology, and it utilizes radiofrequency signal and space coupling and transport property, realizes the automatic identification to static or mobile article.REID has that noncontact, precision height, information gathering are handled rapidly, all weather operations and series of advantages such as applied environment adaptability preferably, has obtained development very rapidly in recent years.
The composition of rfid system generally comprises two parts: (1) electronic tag (Tag): information carrier, form by label chip and antenna; (2) reader (Reader): the equipment that reads or write label information.
Nowadays, the function of mobile phone from strength to strength, and there is integrated multi-purpose trend, combination with mobile phone and RFID technology, make mobile phone possess the field of the mutual location of short distance, can further enlarge the using value and the usable range of mobile phone, bring more facility for people's life, also not have this proven technique at present.
Summary of the invention
Technical matters to be solved by this invention provides a kind of localisation of mobile terminals and localization method based on radio-frequency (RF) identification (RFID), to solve problems such as various locator meamss exist in the prior art bearing accuracy and cost.
In order to solve the problems of the technologies described above, the invention provides a kind of localisation of mobile terminals based on radio-frequency (RF) identification (RFID), this portable terminal comprises:
Microwave antenna is used to receive and dispatch and is used to ask to locate and respond the radiofrequency signal of location or the radiofrequency signal that is used to discern;
The radio-frequency (RF) identification analog front-end module is connected with described microwave antenna, is used for generating digital signal to receiving the described radiofrequency signal demodulation that is used to discern;
The localization process module is connected with described microwave antenna, is used for being used to ask radiofrequency signal of locating and/or the radiofrequency signal that responds the location to obtain its corresponding performance number, phase place and time according to described;
The digital baseband processing module, be connected respectively with the localization process module with described radio-frequency (RF) identification analog front-end module, be used for discerning, and obtain locating information according to described power, phase place and time respectively according to the described radiofrequency signal that is used to discern that is demodulated to digital signal.
Described localisation of mobile terminals based on radio-frequency (RF) identification also comprises:
Locating information simulation display module is connected with described digital baseband processing module, is used for locating information is shown according to planimetric coordinates and three dimensional space coordinate.
Described localisation of mobile terminals based on radio-frequency (RF) identification also comprises:
Support the Subscriber Identity Module of single-wire-protocol, be connected, be used to store the unique sequence number of radio-frequency (RF) identification with described radio-frequency (RF) identification analog front-end module; And
Described digital baseband processing module with described radio-frequency (RF) identification analog front-end module, is further used for the described radiofrequency signal that is used to discern and the unique sequence number of described radio-frequency (RF) identification that are demodulated to digital signal are relatively discerned.
Described radio-frequency (RF) identification analog front-end module is connected with described baseband processing module by the UART Universal Asynchronous Receiver Transmitter interface, and is connected with the pin of described Subscriber Identity Module by signal wire.
Described localization process module comprises:
The RF power strength detecting device, link to each other with described digital baseband processing module, the radiofrequency signal that is used for being used to of receiving responded the location detects, obtain its performance number and be sent to described digital baseband processing module, described digital baseband processing module is further used for calculating first distance according to described performance number;
Phase detector, link to each other with described digital baseband processing module, be used to gather and send the phase place that is used to ask the radiofrequency signal of locating and receives the radiofrequency signal that is used to respond the location, output to described digital baseband processing module and calculate phase difference value, and described digital baseband processing module is further used for calculating second distance according to described phase difference value;
Frequency divider, link to each other with described digital baseband processing module, be used for frequency is divided into different brackets, to measure the described time of asking the radiofrequency signal of locating and being used to respond the radiofrequency signal of location of being used on the frequency of variant grade, output to described digital baseband processing module difference computing time, and described digital baseband processing module is further used for calculating the 3rd distance according to described time difference.
Described microwave antenna is antenna integrated on little band or dipole sheet.
Described localisation of mobile terminals based on radio-frequency (RF) identification also comprises power management module, links to each other with described baseband processing module, localization process module and radio-frequency (RF) identification analog front-end module, is used for it is powered.
The present invention also provides a kind of localization method based on radio-frequency (RF) identification (RFID), and this method comprises:
First terminal sends and is used for request location radiofrequency signal;
First terminal receives the radiofrequency signal that is used to respond the location that second terminal is returned;
First terminal is used to ask radiofrequency signal of locating and/or the radiofrequency signal that responds the location to obtain its corresponding performance number, phase place and time according to described;
First terminal obtains locating information according to described power, phase place and time.
Be used for also comprising before the radiofrequency signal of request location in the step transmission:
First terminal searching, second terminal, the radiofrequency signal that is used to discern to its transmission;
The unique sequence number of radio-frequency (RF) identification that the radiofrequency signal that is used for discerning that second terminal will receive and its Subscriber Identity Module are stored compares, and determines consistent the positioning of the unique sequence number of described identifier and radio-frequency (RF) identification.
Described radiofrequency signal according to described radiofrequency signal that is used to locate and/or response location obtains its corresponding performance number, phase place and time and is specially:
The radiofrequency signal that being used to of receiving is responded the location by the RF power strength detecting device detects, and obtains its performance number;
By frequency divider frequency is divided into different brackets, describedly to be used to the asking radiofrequency signal of locating and to be used to respond time between the radiofrequency signal of location measuring on the frequency of variant grade;
Phase place when the phase place when sending the radiofrequency signal be used to ask to locate by the phase detector collection and receiving is used to respond the radiofrequency signal of location.
Describedly obtain locating information according to described power, phase place and time and specifically comprise:
The digital baseband processing module is scaled first distance value according to the channel fading model with described performance number according to described performance number;
Described digital baseband processing module is calculated the time difference on the frequency of described variant grade, and is used for calculating second distance according to described time difference;
Phase calculation phase difference value when the phase place during radiofrequency signal that described digital baseband processing module is used to ask to locate according to the transmission of gathering and receiving is used to respond the radiofrequency signal of location, and calculate the 3rd distance according to described phase difference value;
Obtain the final distance of locating information based on first distance, second distance and the 3rd distance.
Therefore, the present invention is based on the location that portable terminal that RFID is used to locate and method provide, be a kind of comprehensive angle, high precision, exempt from the real-time intelligent type location and the tracker of alignment, penetrability, identification automatically, microminiaturized, security, as long as both sides' opening module, in the electromagnetic wave induction scope, just can realize real-time positioning function, determine the other side's relative position accurately and fast.
Description of drawings
Fig. 1 the present invention is based on the mobile terminal structure synoptic diagram that radio-frequency (RF) identification is used to locate;
Fig. 2 is the process flow diagram that the present invention is based on the localization method of radio-frequency (RF) identification;
Fig. 3 calculates the process flow diagram that obtains locating information for localization process module of the present invention to digital signal.
Embodiment
Below by drawings and Examples, the technical scheme of the embodiment of the invention is described in further detail.
The present invention is based on radio frequency recognition principle, traditional radio frequency Positioning Principle and traditional range measurement system are integrated in the intelligent mobile terminal (for example mobile phone), add the short distance location algorithm, can be used for the short distance range finding and the location that (comprise loose impediment) between two articles.
Radio frequency recognition principle is based upon on the electromagnetic distance measurement basis.The method of electromagnetic distance measurement mainly contains three kinds, promptly based on RSS (the received signal strength) method of received field strength, based on the incoming wave TOA of time of arrival (time of arrival) method, based on AOA (the angle of arrival) method of incoming wave arrival angle degree.
The invention provides the radio-frequency (RF) identification positioning system that is integrated in portable terminal (for example mobile phone), handle and transmission, carry out short distance identification of targets, location and tracking by the interactive signal of electromagnetic range finding and angle measurement and portable terminal.
Fig. 1 the present invention is based on the mobile terminal structure synoptic diagram that radio-frequency (RF) identification is used to locate.The portable terminal that the present invention is used to locate has the Intelligent Recognition function, and Subscriber Identity Module has been carried out improvement and integrated antenna on the microwave sheet.Position range finding between two portable terminals in the present invention, the portable terminal of initiating this requirement is called inquiry terminal, the portable terminal that is positioned is called as target terminal.
As shown in the figure, the portable terminal 1 that should be used to locate based on radio-frequency (RF) identification comprises microwave antenna 11, radio-frequency (RF) identification analog front-end module 12, digital baseband processing module 13 and localization process module 14, and also comprises positioning monitoring display module 15.Wherein microwave antenna 11, be used to receive and dispatch and be used to ask to locate and respond the radiofrequency signal of location or the radiofrequency signal that is used to discern, microwave antenna is antenna integrated on little band or dipole sheet, if portable terminal is as target terminal, its have receive identification signal (being the ID that has target terminal number the radiofrequency signal that inquiry terminal sends to target terminal) that inquiry terminal sends and, reception will be used to respond the radiofrequency signal of location is given inquiry terminal by reflection modulation function, portable terminal is as inquiry terminal, then have send have target terminal ID number radiofrequency signal to target terminal, send the radiofrequency signal of request location, and the receiving target end reflection through ovennodulation the radiofrequency signal that is used to locate;
Radio-frequency (RF) identification (RFID) analog front-end module 12, be connected with described microwave antenna 11, be used for the radiofrequency signal demodulation that is used to locate that receives is generated digital signal, this radio-frequency (RF) identification analog front-end module 12 specifically comprises voltage conversion circuit, electrify restoration circuit, reference source circuit, and signal demodulating circuit several sections, be used to provide burning voltage by voltage conversion circuit, the purposes of electrify restoration circuit is that sequential circuit is set to state at the beginning in the system, to prevent logical miss, reference source circuit is used for simulation provides reference offset accurately.The major function of signal demodulating circuit is to have from the modulation that microwave antenna receives to recover digital signal the carrier for digital signal.
Digital baseband processing module 13 is connected with described localization process module 14, is used for discerning according to the described radiofrequency signal that is used to discern that is demodulated to digital signal, and obtains locating information according to described power, phase place and time respectively.
Locating information simulation display module 15 is connected with described digital baseband processing module 13, is used for locating information is shown according to planimetric coordinates and three dimensional space coordinate.Locating information simulation display module 15 is by the value of the locating information of localization process module 14 calculating, dynamically be presented on the LCD interfaces windows according to planimetric coordinates and three dimensional space coordinate relative position, realize system real-time follow-up location target terminal and inquiry terminal.
As shown in Figure 1, this portable terminal also comprises: (single Wire Protocol, Subscriber Identity Module 16 SWP) are used to store the unique sequence number of radio-frequency (RF) identification to support single-wire-protocol.Described digital baseband processing module with described radio-frequency (RF) identification analog front-end module, is further used for the described radiofrequency signal that is used to discern and the unique sequence number of described radio-frequency (RF) identification that are demodulated to digital signal are relatively discerned.
Radio-frequency (RF) identification analog front-end module 12 is by UART Universal Asynchronous Receiver Transmitter interface (Universal Asynchronous Receiver Transmitter, be called for short UART) be connected with described digital baseband processing module 13, and be connected by the pin of signal wire with described Subscriber Identity Module 16.
As shown in the figure, this terminal also comprises power management module 17, all link to each other with described baseband processing module 13, locating information simulation display module 15, localization process module 14 and radio-frequency (RF) identification (RFID) analog front-end module 12, be used for it is powered, only indicated the electrical connection of power management module 17 in the accompanying drawings with locating information simulation display module 15.
Continuation is referring to Fig. 1, this localization process module 14 comprises: RF power strength detecting device 141, link to each other with described digital baseband processing module 13, the radiofrequency signal that is used for being used to of receiving responded the location detects, obtain its performance number and be sent to described digital baseband processing module, described digital baseband processing module is further used for calculating first distance according to described performance number;
The course of work between each module of localisation of mobile terminals based on radio-frequency (RF) identification provided by the invention is: the portable terminal with above-mentioned each functional module, in the time will locating the position of other portable terminals as inquiry terminal, activate its each function, the target terminal that will inquire about in the search electromagnetic wave induction scope; After identifying target terminal ID, (mainly pass through anti-collision algorithm), set up communication by authentication agreement and this target terminal, after target terminal receives signal, from sleep pattern, wake up, then, whether ID number in comparison self Subscriber Identity Module in unique sequence number of storing of radio-frequency (RF) identification and the radiofrequency signal that receives be consistent, the terminal that number does not conform to enters park mode once more, the terminal that conforms to then enters mode of operation, received RF signal also returns signal reflex to the inquiry terminal (radiofrequency signal of reflected back inquiry terminal herein, be the radiofrequency signal that is used to respond the location), send into the localization process module, calculate its position data by the digital baseband processing module, then the position data of three kinds of algorithms is carried out compound operation, dynamic similation as a result is shown on the simulation display module then.
In actual applications, improvement on the portable terminal is specially, for example realize that it is the RFID analog front-end module that this scheme need increase the ultrahigh frequency RFID analog front-end chip on the mobile phone etc. on this portable terminal at portable terminal, antenna integrated on little band or the dipole sheet, and use the Subscriber Identity Module of supporting the SWP agreement, be encoding and decoding, the anti-collision function of finishing digital signal on the digital baseband processing module at digital baseband chip simultaneously.Simultaneously, only need on mobile phone, increase RF power level detecting device, phase detector and frequency divider, constitute the localization process module.
And particularly, the RFID analog front-end module is communicated by letter with digital baseband chip by the UART interface, finish the conversion of simulating signal to digital signal, be connected with the C6 pin of Subscriber Identity Module (for example SIM card or UIM card) by a signal wire simultaneously, the unique sequence number of radio-frequency (RF) identification is stored in the Subscriber Identity Module, uses the SWP agreement to communicate by letter with the applying portion in the Subscriber Identity Module.
The microstrip antenna of use 2.4GHz places the back side of mobile phone cover, the transmitting-receiving radiofrequency signal.Microstrip antenna and wireless near field communication (Near Field Communication is called for short NFC) chip is directly linked to each other, then and battery be close to and be placed between battery and the cell phone rear cover, the user need not change mobile phone.Ultrahigh frequency RFID analog front-end chip and SIM card couple together by the C6 pin, realize full duplex communication.The ultrahigh frequency RFID analog front-end chip links to each other with microstrip antenna, realize transmitting and receiving of ultrahigh frequency RFID analog front-end chip, the information that receives is handled to the AP layer of baseband chip by generating digital data transmission after the demodulation of ultrahigh frequency RFID analog front-end chip.The localization process module is powered by power management module by general input and output (General Purpose I/O is called for short GPIO) mouthful control of digital baseband chip.
Based on the process that the portable terminal of said structure function positions, the localization method process flow diagram that the present invention is based on radio-frequency (RF) identification as shown in Figure 2.Summarized introduction at first, the mobile terminal activating RFID positioning function with above-mentioned functions promptly activates its functional module, the target terminal in the inquiry terminal search induction field; Set up orientation and communication by mutual cipher authentication, after promptly setting up communication, in the radiofrequency signal that the checking inquiry terminal sends ID number is consistent with the unique sequence number of the radio-frequency (RF) identification of the target terminal that wakes up, set up orientation and communication then, target terminal is waited for the positioning instruction of inquiry terminal, and inquiry terminal sends positioning instruction to target terminal; Target terminal sends response (promptly being used to respond the radiofrequency signal of location) to inquiry terminal after receiving positioning instruction.Inquiry terminal is converted into range information with reflected signal (promptly being used to respond the radiofrequency signal of location) through above-mentioned digital baseband block and each resume module of localization process module, deposits in the flash memory.Inquiry terminal sends positioning instruction near certain reference target, calculates range information with reference target according to above-mentioned steps, deposits flash chip in.Inquiry terminal calculates the azimuthal coordinates of target terminal through the localization process module, then it is shown apart from the simulation of the angle orientation value of information, realizes the location.The present invention can also resend positioning instruction after 10 seconds by inquiry terminal at interval, target terminal reenters the wait accepting state after sending response, and inquiry terminal receives after the response calculating location information once more, dynamic transmission is given display window, thereby realizes the dynamic tracking location.
Promptly as shown in Figure 2, whole position fixing process may further comprise the steps:
Step 272 detects the described radiofrequency signal that is used to respond the location through radio frequency power detector and obtains its performance number, according to the channel fading model described performance number is scaled modal distance parameter value (what calculate this moment is first distance); Be specially through being input to the RF power strength detecting device after the filtering amplification, testing result becomes digital signal after changing through AD, the digital baseband processing module is converted into the field intensity value by known channel fading model the distance of two terminals, indoor or outdoors channel no matter, the average received signal power is with the logarithmic decrement of distance.The distance correspondence that is signal intensity and interrogator and transponder is as follows:
P(r)＝P(r
0)-10αlog(r/r
0) (1)
Wherein be the power that P (r) inquiry terminal receives, r is the distance between terminal to be positioned (i.e. first terminal) and the inquiry terminal (i.e. second terminal).R0 is the near-earth reference distance, the signal power of P (r0) reference point, and a parameter is a path loss index, increases along with the increase of distance r.At free space, a is 2; When indoor view distance was propagated, a was 1.6-1.8, and when restraining mass, it is big that a becomes.The corresponding model parameter value is stored in the database of localization process module, freely selects according to the different of environment.By the field intensity scaled distance, calculate the numerical value register that the respective distances value deposits first terminal in;
Phase place when step 274, the phase place when sending the radiofrequency signal be used to ask to locate by the phase detector collection and receiving are used to respond the radiofrequency signal of location.
After the phase result that phase detector obtains, notifying digital baseband processing module to calculate phase differential is that signal comes and goes total phase delay that survey line once produces, and converting by following formula obtains the 3rd distance,
The angular frequency of ω---modulation signal, ω=2 π fU---unit lengths, 1/4 modulation wavelength such as numerical value
N---survey line comprises modulation half-wavelength number
The fraction part of the not enough half-wavelength of Δ N---modulating wave that survey line comprises
Numerical value substitution base band is surveyed the phase location model, calculate the 3rd distance and deposit the numerical value register in;
The signal intensity that these three steps of step 273-275 are described is handled, difference frequency is surveyed the chi processing and the phase demodulation measurement all is a prior art, no longer carries out detailed giving unnecessary details.
Can also comprise that after above-mentioned steps dynamic display position information realizes following function, promptly further comprising the steps of: first terminal compartment 10s emission inquiry message once, redeterminate locating information (process of specifically measuring is as above-mentioned shown in Figure 3), thereby dynamically the display-object terminal positional information is realized following function.
The present invention is based on the RFID principle and realized real-time positioning and tracking, portable terminal of the present invention is a kind of comprehensive angle, high precision, exempt from alignment, the real-time intelligent type location and the tracker of penetrability, identification automatically, microminiaturized, security.As long as both sides open above-mentioned each module, in the electromagnetic wave induction scope, just can realize real-time positioning function, determine the other side's relative position accurately and fast.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment, change the present invention or be equal to replacement, and not break away from the spirit and scope of the present invention and claim.
Claims (11)
1. portable terminal that is used to locate based on radio-frequency (RF) identification is characterized in that comprising:
Microwave antenna is used to receive and dispatch and is used to ask to locate and respond the radiofrequency signal of location or the radiofrequency signal that is used to discern;
The radio-frequency (RF) identification analog front-end module is connected with described microwave antenna, is used for generating digital signal to receiving the described radiofrequency signal demodulation that is used to discern;
The localization process module is connected with described microwave antenna, is used for being used to ask radiofrequency signal of locating and/or the radiofrequency signal that responds the location to obtain its corresponding performance number, phase place and time according to described;
The digital baseband processing module, be connected respectively with the localization process module with described radio-frequency (RF) identification analog front-end module, be used for discerning, and obtain locating information according to described power, phase place and time respectively according to the described radiofrequency signal that is used to discern that is demodulated to digital signal.
2. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 1 is characterized in that also comprising:
Locating information simulation display module is connected with described digital baseband processing module, is used for locating information is shown according to planimetric coordinates and three dimensional space coordinate.
3. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 2 is characterized in that also comprising:
Support the Subscriber Identity Module of single-wire-protocol, be connected, be used to store the unique sequence number of radio-frequency (RF) identification with described radio-frequency (RF) identification analog front-end module; And
Described digital baseband processing module with described radio-frequency (RF) identification analog front-end module, is further used for the described radiofrequency signal that is used to discern and the unique sequence number of described radio-frequency (RF) identification that are demodulated to digital signal are relatively discerned.
4. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 3, it is characterized in that described radio-frequency (RF) identification analog front-end module is connected with described baseband processing module by the UART Universal Asynchronous Receiver Transmitter interface, and be connected with the pin of described Subscriber Identity Module by signal wire.
5. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 4 is characterized in that described localization process module comprises:
The RF power strength detecting device, link to each other with described digital baseband processing module, the radiofrequency signal that is used for being used to of receiving responded the location detects, obtain its performance number and be sent to described digital baseband processing module, described digital baseband processing module is further used for calculating first distance according to described performance number;
Phase detector, link to each other with described digital baseband processing module, be used to gather and send the phase place that is used to ask the radiofrequency signal of locating and receives the radiofrequency signal that is used to respond the location, output to described digital baseband processing module and calculate phase difference value, and described digital baseband processing module is further used for calculating second distance according to described phase difference value;
Frequency divider, link to each other with described digital baseband processing module, be used for frequency is divided into different brackets, to measure the described time of asking the radiofrequency signal of locating and being used to respond the radiofrequency signal of location of being used on the frequency of variant grade, output to described digital baseband processing module difference computing time, and described digital baseband processing module is further used for calculating the 3rd distance according to described time difference.
6. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 5 is characterized in that described microwave antenna is for antenna integrated on little band or dipole sheet.
7. the localisation of mobile terminals based on radio-frequency (RF) identification as claimed in claim 6 is characterized in that also comprising power management module, links to each other with described baseband processing module, localization process module and radio-frequency (RF) identification analog front-end module, is used for it is powered.
8. localization method based on radio-frequency (RF) identification is characterized in that comprising:
First terminal sends and is used for request location radiofrequency signal;
First terminal receives the radiofrequency signal that is used to respond the location that second terminal is returned;
First terminal is used to ask radiofrequency signal of locating and/or the radiofrequency signal that responds the location to obtain its corresponding performance number, phase place and time according to described;
First terminal obtains locating information according to described power, phase place and time.
9. the localization method based on radio-frequency (RF) identification as claimed in claim 8 is characterized in that being used for also comprising before the radiofrequency signal of request location in the step transmission:
First terminal searching, second terminal, the radiofrequency signal that is used to discern to its transmission;
The unique sequence number of radio-frequency (RF) identification that the radiofrequency signal that is used for discerning that second terminal will receive and its Subscriber Identity Module are stored compares, and determines consistent the positioning of the unique sequence number of described identifier and radio-frequency (RF) identification.
10. the localization method based on radio-frequency (RF) identification as claimed in claim 9 is characterized in that described radiofrequency signal according to described radiofrequency signal that is used to locate and/or response location obtains its corresponding performance number, phase place and time and is specially:
The radiofrequency signal that being used to of receiving is responded the location by the RF power strength detecting device detects, and obtains its performance number;
By frequency divider frequency is divided into different brackets, describedly to be used to the asking radiofrequency signal of locating and to be used to respond time between the radiofrequency signal of location measuring on the frequency of variant grade;
Phase place when the phase place when sending the radiofrequency signal be used to ask to locate by the phase detector collection and receiving is used to respond the radiofrequency signal of location.
11. the localization method based on radio-frequency (RF) identification as claimed in claim 10 is characterized in that describedly obtaining locating information according to described power, phase place and time and specifically comprising:
The digital baseband processing module is scaled first distance value according to the channel fading model with described performance number according to described performance number;
Described digital baseband processing module is calculated the time difference on the frequency of described variant grade, and is used for calculating second distance according to described time difference;
Phase calculation phase difference value when the phase place during radiofrequency signal that described digital baseband processing module is used to ask to locate according to the transmission of gathering and receiving is used to respond the radiofrequency signal of location, and calculate the 3rd distance according to described phase difference value;
Obtain the final distance of locating information based on first distance, second distance and the 3rd distance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178192.4A CN102043151B (en) | 2009-10-19 | 2009-10-19 | Mobile terminal and method for positioning based on radio frequency identification |
| PCT/CN2010/071286 WO2010145251A1 (en) | 2009-10-19 | 2010-03-25 | Mobile terminal for implementing location based on radio frequency identification and location method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178192.4A CN102043151B (en) | 2009-10-19 | 2009-10-19 | Mobile terminal and method for positioning based on radio frequency identification |
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| Publication Number | Publication Date |
|---|---|
| CN102043151A true CN102043151A (en) | 2011-05-04 |
| CN102043151B CN102043151B (en) | 2014-11-05 |
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| CN200910178192.4A Active CN102043151B (en) | 2009-10-19 | 2009-10-19 | Mobile terminal and method for positioning based on radio frequency identification |
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| CN102404845A (en) * | 2011-12-27 | 2012-04-04 | 苏州佰思迈信息咨询有限公司 | Wireless location communication system |
| CN102577189A (en) * | 2009-10-12 | 2012-07-11 | 摩托罗拉解决方案公司 | Method and apparatus for determining range information of a node in a wireless system |
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| CN104299016A (en) * | 2014-09-30 | 2015-01-21 | 小米科技有限责任公司 | Object location method and device |
| CN104459612A (en) * | 2014-11-26 | 2015-03-25 | 四川长虹电器股份有限公司 | Mobile terminal with function of measuring distance and direction of wifi equipment |
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| US10049556B2 (en) | 2014-09-30 | 2018-08-14 | Xiaomi Inc. | Method and device for positioning objects |
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| CN102577189B (en) * | 2009-10-12 | 2014-09-03 | 摩托罗拉解决方案公司 | Method and apparatus for determining range information of a node in a wireless system |
| CN102577189A (en) * | 2009-10-12 | 2012-07-11 | 摩托罗拉解决方案公司 | Method and apparatus for determining range information of a node in a wireless system |
| CN102404845A (en) * | 2011-12-27 | 2012-04-04 | 苏州佰思迈信息咨询有限公司 | Wireless location communication system |
| CN103049774B (en) * | 2012-12-14 | 2015-07-22 | 华中科技大学 | Method for realizing automatic location of moving objects in mould processing process |
| CN103049774A (en) * | 2012-12-14 | 2013-04-17 | 华中科技大学 | Method for realizing automatic location of moving objects in mould processing process |
| CN104299016A (en) * | 2014-09-30 | 2015-01-21 | 小米科技有限责任公司 | Object location method and device |
| CN104299016B (en) * | 2014-09-30 | 2018-02-02 | 小米科技有限责任公司 | Object positioning method and device |
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| CN104459612A (en) * | 2014-11-26 | 2015-03-25 | 四川长虹电器股份有限公司 | Mobile terminal with function of measuring distance and direction of wifi equipment |
| WO2017024673A1 (en) * | 2015-08-12 | 2017-02-16 | 西安斯凯智能科技有限公司 | Target positioning system and method based on radio frequency and binocular vision |
| US11374434B2 (en) | 2015-10-14 | 2022-06-28 | Delta Electronics, Inc. | Radio frequency energy-harvesting apparatus |
| CN106597430A (en) * | 2015-10-14 | 2017-04-26 | 黄尊禧 | Radio-frequency energy transfer device having positioning function and method thereof and radio frequency energy hunting device |
| CN106597430B (en) * | 2015-10-14 | 2019-06-11 | 黄尊禧 | The radio frequency energy-transfer device and its method and RF energy energy hunting device of tool positioning function |
| CN105629223A (en) * | 2015-12-21 | 2016-06-01 | 广东欧珀移动通信有限公司 | Mobile terminal and measurement method thereof |
| CN107356903A (en) * | 2017-06-28 | 2017-11-17 | 智坤（江苏）半导体有限公司 | Passive RFID localization method and device based on phase difference measurement |
| CN111868546A (en) * | 2018-03-13 | 2020-10-30 | 赛普拉斯半导体公司 | Asset localization using direction finding features |
| CN111868546B (en) * | 2018-03-13 | 2022-04-08 | 赛普拉斯半导体公司 | Asset localization using direction finding features |
| US11378641B2 (en) | 2018-03-13 | 2022-07-05 | Cypress Semiconductor Corporation | Asset location using direction finding features |
| CN109975752A (en) * | 2019-03-25 | 2019-07-05 | 深圳市联智物联网科技有限公司 | A kind of phase shift rangefinder method |
| CN113906770A (en) * | 2019-04-26 | 2022-01-07 | 阿莫善斯有限公司 | Position measuring device |
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| WO2010145251A1 (en) | 2010-12-23 |
| CN102043151B (en) | 2014-11-05 |
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