CN102752713B - Wireless locating method based on long-term evolution signal system, and terminal - Google Patents
Wireless locating method based on long-term evolution signal system, and terminal Download PDFInfo
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Abstract
The invention discloses a wireless locating method based on a long-term evolution signal system, and a terminal, belonging to the field of location technology. The method comprises the steps of: using the terminal to receive a locating signal which is sent by a base station and carries navigation message, wherein the navigation message comprises locating information which at least comprises the height information and the air pressure value at the base station and time synchronization error correction information; acquiring the navigation message carried in the locating signal; and locating according to the locating information in the navigation message. The invention can be used for receiving the locating signal which is sent by the base station and carries the navigation message, acquiring the navigation message carried in the locating signal and automatically locating according to the locating information in the navigation message, so the computation burden of a service desk can be reduced; furthermore, compared with location realized by an orthogonal frequency division multiplexing (OFDM) modulation mode, the embodiment of the invention has the advantages of improving the location accuracy and reducing the location complexity.
Description
Technical field
The present invention relates to field of locating technology, particularly a kind of wireless location method and terminal based on Long Term Evolution signal system.
Background technology
Along with the development of the communication technology, the range of application of wireless location is more and more wider.Combine with various wireless signals, as Chirp signal, Zigbee (purple honeybee) signal, UWB (Ultra Wideband, ultra broadband) pilot signal in signal and communication system, make wireless location can be applied to different field, enrich people's life.How to improve the precision of wireless location, allow its better services be emphasis of wireless location research in masses.
In existing wireless location mode, for OFDM (Orthogonal Frequency Division Multiplexing, OFDM) system PRS (Positioning Reference Signals, location reference signals), for the configuration of downlink wireless frame, by utilizing this PRS as known signal, separate signal correction operation, obtain multiple time delays that reach base station, by positional parameter (time delay) request return service platform, realize location by information desk.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
Because existing wireless location mode need to be by positional parameter return service platform, positioned by information desk, and terminal cannot independently be located, amount of calculation is entirely in information desk one side, cause information desk to be difficult to support the parallel location of mass users, real-time statistics customer position information is difficulty comparatively; In addition, locating information passback real-time performance is difficult to ensure, causes many filtering algorithm effects to be difficult to arrive optimum state, affects positioning precision, and adopts OFDM modulating mode, distance measuring method complexity.
Summary of the invention
For terminal can independently be located when, improve positioning precision, reduce the computation burden of location complexity and information desk, the embodiment of the present invention provides a kind of wireless location method and terminal based on Long Term Evolution signal system.Described technical scheme is as follows:
On the one hand, provide a kind of wireless location method based on Long Term Evolution signal system, described method comprises:
Terminal receives the pilot signal of base station transmission and carries the framing signal of navigation message, between the code phase of described framing signal and described pilot signal, there is default corresponding relation, described navigation message comprises locating information, and described locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at described base station place;
Slightly catch the initial phase site that obtains described framing signal according to described pilot signal, and dock according to the initial phase site of the default corresponding relation between the code phase of described framing signal and pilot signal and described framing signal the framing signal of receiving and process, obtain described framing signal incoming terminal the time of advent poor TDOA information and described framing signal in the navigation message that carries;
Determine current elevation information according to described navigation message and local atmospheric pressure value, according to described navigation message, described TDOA information is revised, and position according to described current elevation information and revised TDOA information.
Further, the described initial phase site according to the default corresponding relation between the code phase of described framing signal and described pilot signal and described framing signal is docked the framing signal of receiving and is processed, differ from the navigation message carrying in TDOA information and described framing signal the time of advent that obtains described framing signal incoming terminal, specifically comprises:
Obtain the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of described framing signal, described framing signal and described pilot signal, and utilize frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis of the code phase rough estimate value of described each framing signal;
According to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the framing signal receiving is carried out to integration, tenacious tracking, and from tenacious tracking to described framing signal extract described framing signal incoming terminal the time of advent poor TDOA information and described framing signal in the navigation message that carries.
Further, code phase rough estimate value and the carrier frequency rough estimate value of each framing signal carried out integration, tenacious tracking to the framing signal receiving described in described basis, specifically comprises:
According to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilize the local correlation that code and described framing signal occur, the framing signal after peeling off and described local generation yard are carried out to integration;
According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of described each framing signal, and according to the accurate estimated value of the code phase of described each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
Further, the framing signal that carries navigation message that described reception base station sends, specifically comprises:
The framing signal that carries navigation message that receiving neighbor bs adopts different frequency to send;
Describedly determine current elevation information according to described navigation message and local atmospheric pressure value, specifically comprise:
Obtain the proportionate relationship between described current elevation information and local atmospheric pressure value according to the proportionate relationship between elevation information and the atmospheric pressure value at the described base station place comprising in described navigation message, determine described current elevation information according to the proportionate relationship between described current elevation information and local atmospheric pressure value and described local atmospheric pressure value;
Describedly according to described navigation message, described TDOA information is revised, is specifically comprised:
According to the described time synchronization error update information comprising in described navigation message, described TDOA information is revised.
On the other hand, also provide a kind of terminal, described terminal comprises:
Receiver module, the framing signal that carries navigation message sending for receiving base station, described navigation message comprises locating information, and described locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at described base station place;
Acquisition module, the navigation message carrying for obtaining framing signal that described receiver module receives;
Locating module, the locating information comprising for the navigation message getting according to described acquisition module positions;
Described receiver module, the pilot signal sending specifically for reception base station and the framing signal that carries navigation message, have default corresponding relation between the code phase of described framing signal and described pilot signal;
Described acquisition module, specifically comprises:
Catch submodule, slightly catch the initial phase site that obtains described framing signal for the pilot signal receiving according to described receiver module;
Process submodule, for according to the default corresponding relation between the code phase of described framing signal and pilot signal and described in catch the described framing signal that submodule obtains initial phase site dock the framing signal of receiving and processes, differ from the navigation message carrying in TDOA information and described framing signal the time of advent that obtains described framing signal incoming terminal;
Described locating module, specifically comprises:
Determine submodule, determine current elevation information for the navigation message and the local atmospheric pressure value that obtain according to described processing submodule;
Revise submodule, for the navigation message obtaining according to described processing submodule, described processing submodule is obtained to TDOA information and revise;
Locator module, positions for current elevation information and the revised TDOA information of described correction submodule determined according to described definite submodule.
Further, described processing submodule, specifically comprises:
The first estimation unit, for obtaining the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of described framing signal, described framing signal and described pilot signal;
The second estimation unit, utilizes frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis for the code phase rough estimate value of each framing signal of obtaining at described the first estimation unit;
Processing unit, for estimating that according to described the first estimation unit the code phase rough estimate value of each framing signal obtaining and described the second estimation unit estimate that the carrier frequency rough estimate value of each framing signal obtaining carries out integration, tenacious tracking to the framing signal receiving;
Extraction unit, for from described processing unit tenacious tracking to described framing signal extract described framing signal incoming terminal the time of advent poor TDOA information and described framing signal the navigation message that carries.
Further, described processing unit, specifically comprises:
Integration subelement, be used for according to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilize the local correlation that code and described framing signal occur, the framing signal after peeling off and described local generation yard are carried out to integration;
Follow the tracks of subelement, encircle and carrier wave ring for the code according to the integrated value track loop of described integration subelement gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of described each framing signal, and according to the accurate estimated value of the code phase of described each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
Further, described receiver module, the framing signal that carries navigation message that adopts different frequency to send specifically for receiving neighbor bs;
Described definite submodule, obtain the proportionate relationship between described current elevation information and local atmospheric pressure value specifically for the proportionate relationship between elevation information and the atmospheric pressure value at the described base station place that comprises in the navigation message obtaining according to described processing submodule, determine described current elevation information according to the proportionate relationship between described current elevation information and local atmospheric pressure value and described local atmospheric pressure value;
Described correction submodule, revises described TDOA information specifically for the described time synchronization error update information comprising in the navigation message obtaining according to described processing submodule.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The framing signal that carries navigation message sending by receiving base station, obtains navigation message according to framing signal, so that terminal independently locates according to the locating information in navigation message, and then reduces the computation burden of information desk; In addition, compared with adopting OFDM modulating mode realization location, can improve positioning precision, reduce location complexity.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the wireless location method flow chart based on Long Term Evolution signal system that the embodiment of the present invention one provides;
Fig. 2 is the wireless location method flow chart based on Long Term Evolution signal system that the embodiment of the present invention two provides;
Fig. 3 is the structural representation of the terminal that provides of the embodiment of the present invention three;
Fig. 4 is the structural representation of the acquisition module that provides of the embodiment of the present invention three;
Fig. 5 is the structural representation of the locating module that provides of the embodiment of the present invention three;
Fig. 6 is the structural representation of the processing submodule that provides of the embodiment of the present invention three;
Fig. 7 is the structural representation of the processing unit that provides of the embodiment of the present invention three.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment mono-
The present embodiment provides a kind of wireless location method based on Long Term Evolution signal system, the method is by improving LTE (Long Term Evolution, Long Term Evolution) signal system, make base station there is the function that sends the framing signal of carrying navigation message, realize terminal and independently locate according to navigation message.Wherein, the present embodiment is to include the locating information such as elevation information, atmospheric pressure value and the time synchronization error update information at base station place as example in navigation message, make terminal determine current elevation information by elevation information, atmospheric pressure value and the local atmospheric pressure value at base station place, according to navigation message to TDOA (Time Difference of Arrival, the time of advent is poor) information revises, to position according to current elevation information and revised TDOA information.Referring to Fig. 1, the method flow that the present embodiment provides is specific as follows:
101: terminal receives the framing signal that carries navigation message that base station sends, and this navigation message comprises locating information, and this locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at base station place;
Wherein, terminal receives the framing signal that carries navigation message that base station sends, and specifically comprises:
Terminal receives the pilot signal of base station transmission and carries the framing signal of navigation message, has default corresponding relation between the code phase of framing signal and pilot signal.
102: obtain the navigation message carrying in framing signal;
Wherein, obtain the navigation message carrying in framing signal, specifically comprise:
Slightly catch the initial phase site that obtains framing signal according to pilot signal, and dock according to the initial phase site of the default corresponding relation between the code phase of framing signal and pilot signal and framing signal the framing signal of receiving and process, obtain framing signal incoming terminal the time of advent poor TDOA information and framing signal in the navigation message that carries.
Further, docking according to the initial phase site of the default corresponding relation between the code phase of framing signal and pilot signal and framing signal the framing signal of receiving processes, differ from the navigation message carrying in TDOA information and framing signal the time of advent that obtains framing signal incoming terminal, specifically comprises:
Obtain the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of framing signal, framing signal and pilot signal, and utilize frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis of the code phase rough estimate value of each framing signal;
According to the code phase rough estimate value of each framing signal and carrier frequency rough estimate value, the framing signal receiving is carried out to integration, tenacious tracking, and from tenacious tracking to framing signal extract framing signal incoming terminal the time of advent poor TDOA information and framing signal in the navigation message that carries.
Further, according to the code phase rough estimate value of each framing signal and carrier frequency rough estimate value, the framing signal receiving is carried out to integration, tenacious tracking, specifically comprises:
According to the code phase rough estimate value of each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilized the local correlation that code and framing signal occur, be there is yard to carry out integration with local in the framing signal after peeling off;
According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of each framing signal, and according to the accurate estimated value of the code phase of each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
103: position according to the locating information comprising in navigation message.
Wherein, position according to the locating information comprising in navigation message, specifically comprise:
Determine current elevation information according to navigation message and local atmospheric pressure value, according to navigation message, TDOA information is revised, and position according to current elevation information and revised TDOA information.
Further, receive the framing signal that carries navigation message that base station sends, specifically comprise:
The framing signal that carries navigation message that receiving neighbor bs adopts different frequency to send;
Determine current elevation information according to navigation message and local atmospheric pressure value, specifically comprise:
Obtain the proportionate relationship between current elevation information and local atmospheric pressure value according to the proportionate relationship between elevation information and the atmospheric pressure value at the base station place comprising in navigation message, determine current elevation information according to the proportionate relationship between current elevation information and local atmospheric pressure value and local atmospheric pressure value;
According to navigation message, TDOA information is revised, is specifically comprised:
According to the time synchronization error update information comprising in navigation message, TDOA information is revised.
The method that the present embodiment provides, carry the navigation message that includes the locating information such as elevation information, atmospheric pressure value and the time synchronization error update information at base station place by framing signal, make terminal obtain the navigation message in framing signal, independently locate according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with adopting OFDM modulating mode realization location, can improve positioning precision, reduce location complexity.
The wireless location method based on Long Term Evolution signal system providing in order more clearly to set forth above-described embodiment, in conjunction with foregoing, taking following embodiment bis-as example, the wireless location method based on Long Term Evolution signal system is described in detail, refer to following embodiment bis-:
Embodiment bis-
The present embodiment provides a kind of wireless location method based on Long Term Evolution signal system, and the content that the method provides in conjunction with above-described embodiment one, by improving LTE signal system, is ensureing under the prerequisite of positioning precision, makes terminal realize autonomous location.For convenience of explanation, the present embodiment is (Code Division Multiple Access taking framing signal as CDMA, code division multiple access) frequency expansion sequence, pilot signal is that PRS is example, and the wireless location method based on Long Term Evolution signal system is illustrated.Referring to Fig. 2, the method flow that the present embodiment provides is specific as follows:
201: base station obtains navigation message, in this navigation message, comprise locating information, this locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at base station place;
Wherein, when base station obtains navigation message, specifically by air pressure, the temperature at baroceptor base stations detected place, by the synchronous update information of clock acquisition time at base station place, the air pressure at the base station place detecting, temperature, time synchronized update information are carried out to text framing, obtain navigation message.
The mode that the present embodiment does not obtain navigation message to base station limits, navigation message is except comprising above-mentioned locating information, can also comprise the information such as Base Station Identification, base station position information and CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC) code) check digit; Certainly, except foregoing, navigation message can also comprise other guide, and the present embodiment does not limit the particular content of navigation message.
202: base station produces and carries the CDMA frequency expansion sequence of navigation message, and produces PRS, and CDMA frequency expansion sequence and PRS are sent to terminal;
For this step, base station produces the mode of the CDMA frequency expansion sequence that carries navigation message, specifically includes but not limited to following mode:
Generate the required spreading code in location, and utilize spreading code to carry out spread spectrum to the navigation message obtaining, obtain carrying the frequency expansion sequence of navigation message, this frequency expansion sequence can be used as framing signal.When concrete enforcement, default big or small navigation message can carried in the frequency expansion sequence of Preset Time, for example, in the frequency expansion sequence of 10 milliseconds, carrying 1bit (bit) navigation message, certainly,, except Preset Time being set as to 10 milliseconds, will presetting size and be set as outside 1bit, Preset Time and default size can also be taked other values, and the present embodiment does not limit Preset Time and default size.When the CDMA frequency expansion sequence of navigation message is carried in generation in base station, the method that the present embodiment provides also comprises:
Produce pilot signal, and control according to the time that produces pilot signal is carried navigation message time of framing signal to producing, make to form default corresponding relation between the code phase of framing signal and pilot signal;
Correspondingly, framing signal is sent to terminal, specifically comprises:
Framing signal is carried out to power control, make the amplitude of framing signal lower than the amplitude of pilot signal;
Framing signal and the pilot signal of carrying out after power control are superposeed, and the signal after stack is sent to terminal, obtain according to the default corresponding relation between the code phase of framing signal and pilot signal the navigation message carrying in framing signal by terminal, to position according to navigation message.
Wherein, base station produces the mode of PRS, specifically can realize according to existing implementation, and the present embodiment is not done concrete restriction to this.Why CDMA frequency expansion sequence and PRS are sent to terminal in the lump, in order to make after CDMA frequency expansion sequence and PRS that terminal receives at subsequent step, can obtain navigation message according to the default corresponding relation having between the code phase of CDMA frequency expansion sequence and PRS, realize location according to the locating information in navigation message.About the default corresponding relation having between the code phase of CDMA frequency expansion sequence and PRS, for example, can for carry out with PRS the first place of CDMA frequency expansion sequence, head aligns or tail aligns.Certainly, except the default corresponding relations such as head alignment or tail alignment, can also adopt other corresponding relations, the present embodiment is not done concrete restriction to this.
Because the method that the present embodiment provides has been carried out power control to framing signal, make the amplitude of framing signal lower than the amplitude of pilot signal, therefore, CDMA frequency expansion sequence energy is low, for example, lower than ofdm signal 18dB (decibel), thereby do not affect the proper communication of the ofdm signal including PRS signal.And PRS sequence is produced by pseudo random sequence c (i), be designated as
be expressed as:
Wherein, l is OFDM symbol sequence number in a time slot, n
sthe timeslot number of downlink wireless frame,
it is the Physical Resource Block number of down link maximum.Before each subframe starts, PN (Pseudo_Noise, pseudorandom) sequence generator all needs to carry out initialization, and initializing expression is:
Wherein, in standard C P (Cyclic Prefix, Cyclic Prefix) situation,
in expansion CP situation,
PRS sequence need to be mapped to resource particle, and the modulation symbol that copies being mapped to is:
Wherein, p is antenna end slogan, and in agreement, setting is 6.
The mode that sends CDMA frequency expansion sequence and PRS for base station, the present embodiment is not specifically limited.In order to reduce the interference that sends framing signal between base station, in the method that the present embodiment provides, adjacent base station can adopt different frequency to send CDMA frequency expansion sequence.For example, each base station code check 1MHZ, bandwidth 2MHZ, the CDMA frequency expansion sequence that base station sends is distributed on the different frequency range of LTE of 20M bandwidth, and the present embodiment does not limit the concrete frequency of base station transmission CDMA frequency expansion sequence.
203: terminal receives CDMA frequency expansion sequence and the PRS that base station sends;
Wherein, terminal in the time receiving the CDMA frequency expansion sequence that base station sends, the CDMA frequency expansion sequence that can receiving neighbor bs adopts different frequency to send.In the navigation message that this CDMA frequency expansion sequence carries, comprise locating information.
204: terminal is slightly caught the initial phase site that obtains CDMA frequency expansion sequence according to PRS;
For this step, the mode that the present embodiment is not slightly caught PRS limits, and while specifically enforcement, can slightly catch PRS according to existing thick acquisition mode.After PRS is slightly caught, slightly catch result and can obtain the initial phase site of CDMA frequency expansion sequence, the initial phase site of this CDMA frequency expansion sequence can be used for follow-up tracking.
205: terminal is docked according to the initial phase site of the default corresponding relation between the code phase of CDMA frequency expansion sequence and PRS and CDMA frequency expansion sequence the CDMA frequency expansion sequence of receiving and processed, obtain the navigation message carrying in the TDOA information of CDMA frequency expansion sequence incoming terminal and CDMA frequency expansion sequence;
Particularly, the present embodiment does not dock according to the initial phase site of the default corresponding relation between the code phase of CDMA frequency expansion sequence and PRS and CDMA frequency expansion sequence the CDMA frequency expansion sequence of receiving to terminal to be processed, the mode that obtains the navigation message carrying in the TDOA information of CDMA frequency expansion sequence incoming terminal and CDMA frequency expansion sequence limits, only as follows for example describes:
First, obtain the code phase rough estimate value of each CDMA frequency expansion sequence according to the default corresponding relation between the code phase of the initial phase site of CDMA frequency expansion sequence, CDMA frequency expansion sequence and PRS, and utilize frequency search to obtain the carrier frequency rough estimate value of each CDMA frequency expansion sequence on the basis of the code phase rough estimate value of each CDMA frequency expansion sequence;
Secondly, according to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value, the CDMA frequency expansion sequence receiving is carried out to integration, tenacious tracking, extract the poor TDOA information time of advent of CDMA frequency expansion sequence incoming terminal by the tenacious tracking to CDMA frequency expansion sequence, and from CDMA frequency expansion sequence, extract the navigation message carrying in CDMA frequency expansion sequence.
In the time the CDMA frequency expansion sequence receiving being carried out to integration, tenacious tracking according to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value, include but not limited to following implementation:
According to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value, utilize the local correlation that code and CDMA frequency expansion sequence occur, the CDMA frequency expansion sequence and the carrier wave that receive are peeled off, and the CDMA frequency expansion sequence after peeling off and the local code that occurs are carried out to integration;
According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of each CDMA frequency expansion sequence, and according to the accurate estimated value of the code phase of each CDMA frequency expansion sequence and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
Wherein, the CDMA frequency expansion sequence after peeling off and the local yard mode of carrying out integration that occurs can be realized according to existing integral way, this enforcement is not specifically limited this.
206: terminal is determined current elevation information according to navigation message and local atmospheric pressure value, according to navigation message, TDOA information is revised, and positioned according to current elevation information and revised TDOA information.
Wherein, when terminal is determined current elevation information according to navigation message and local atmospheric pressure value, the present embodiment is not equally to determining that mode limits, for above-mentioned navigation message, proportionate relationship between elevation information and the atmospheric pressure value at the base station place that can comprise according to the locating information in navigation message obtains the proportionate relationship between current elevation information and local atmospheric pressure value, determines current elevation information according to the proportionate relationship between current elevation information and local atmospheric pressure value and local atmospheric pressure value.For example, the elevation information at base station place is X, and atmospheric pressure value is Y, and current elevation information is M, and local atmospheric pressure value is N, and X/Y=M/N, in the situation that X, Y, N are known, can obtain current elevation information M.The present embodiment is the elevation information to base station place, atmospheric pressure value not, and the concrete size of local atmospheric pressure value limits.While obtaining local atmospheric pressure value, can measure by local baroceptor.When TDOA information correction according to navigation message, the present embodiment does not limit correcting mode equally, for above-mentioned navigation message, can revise TDOA information according to the time synchronization error update information comprising in navigation message.
The mode positioning according to current elevation information and revised TDOA information about terminal, the present embodiment is not specifically limited, and while specifically enforcement, can realize according to the existing mode positioning according to elevation information, TDOA information.In addition, the method that the present embodiment provides, after positioning according to current elevation information and TDOA information, also comprises the step that positioning result is back to information desk, so that information desk can carry out other location-based service according to this positioning result, for example, position enquiring etc.
The method that the present embodiment provides, obtain the navigation message that comprises locating information by base station, and this navigation message is carried in framing signal and sends to terminal, terminal can independently be located according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with adopting OFDM modulating mode realization location, the method that the present embodiment provides can improve positioning precision, reduces location complexity.
Embodiment tri-
The present embodiment provides a kind of terminal, and this terminal is for the end side function of the wireless location method based on Long Term Evolution signal system carrying out above-described embodiment one and embodiment bis-and provide.Referring to Fig. 3, this terminal comprises:
Receiver module 31, the framing signal that carries navigation message sending for receiving base station, navigation message comprises locating information, and locating information at least comprises the navigation message of elevation information, atmospheric pressure value and the time synchronization error update information at base station place;
Acquisition module 32, the navigation message carrying for obtaining framing signal that receiver module 31 receives;
Locating module 33, the locating information comprising for the navigation message getting according to acquisition module 32 positions.
Wherein, receiver module 31, the pilot signal sending specifically for reception base station and the framing signal that carries navigation message, have default corresponding relation between the code phase of framing signal and pilot signal;
Referring to Fig. 4, this acquisition module 32, specifically comprises:
Catch submodule 321, slightly catch the initial phase site that obtains framing signal for the pilot signal receiving according to receiver module 31;
Process submodule 322, for according to the default corresponding relation between the code phase of framing signal and pilot signal and the initial phase site of catching the framing signal that submodule 321 obtains dock the framing signal of receiving and processes, differ from the navigation message carrying in TDOA information and framing signal the time of advent that obtains framing signal incoming terminal;
Referring to Fig. 5, this locating module 33, specifically comprises:
Determine submodule 331, determine current elevation information for the navigation message and the local atmospheric pressure value that obtain according to processing submodule 322;
Revise submodule 332, for the navigation message obtaining according to processing submodule 331, processing submodule is obtained to TDOA information and revise;
Locator module 333, for positioning according to determining the current elevation information that submodule 331 is determined and revising the revised TDOA information of submodule 332.
Referring to Fig. 6, process submodule 322, specifically comprise:
The first estimation unit 3221, for obtaining the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of framing signal, framing signal and pilot signal;
The second estimation unit 3222, utilizes frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis for the code phase rough estimate value of each framing signal of obtaining at the first estimation unit 3221;
Processing unit 3223, for estimating that according to the first estimation unit 3221 the code phase rough estimate value of each framing signal obtaining and the second estimation unit 3222 estimate that the carrier frequency rough estimate value of each framing signal obtaining carries out integration, tenacious tracking to the framing signal receiving;
Extraction unit 3224, for from processing unit 3223 tenacious trackings to framing signal extract framing signal incoming terminal the time of advent poor TDOA information and framing signal the navigation message that carries.
Referring to Fig. 7, processing unit 3223, specifically comprises:
Integration subelement 3223a, be used for according to the code phase rough estimate value of each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilized the local correlation that code and framing signal occur, the framing signal after peeling off with local integration is occurred yard to carry out;
Follow the tracks of subelement 3223b, encircle and carrier wave ring for the code according to the integrated value track loop of integration subelement 3223a gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of each framing signal, and according to the accurate estimated value of the code phase of each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
Further, receiver module 31, the framing signal that carries navigation message that adopts different frequency to send specifically for receiving neighbor bs;
Determine submodule 331, specifically for obtaining the proportionate relationship between current elevation information and local atmospheric pressure value according to the proportionate relationship of processing between elevation information and the atmospheric pressure value at the base station place comprising in the navigation message that obtains of submodule 322, determine current elevation information according to the proportionate relationship between current elevation information and local atmospheric pressure value and local atmospheric pressure value;
Revise submodule 332, specifically for the time synchronization error update information comprising in the navigation message obtaining according to processing submodule 322, TDOA information is revised.
The terminal that the present embodiment provides, the framing signal of carrying navigation message sending by receiving base station, obtain the navigation message that comprises locating information according to this framing signal, realize and independently locating according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with adopting OFDM modulating mode realization location, the method that the present embodiment provides can improve positioning precision, reduces location complexity.
It should be noted that: the terminal that above-described embodiment provides is in the time of the wireless location of carrying out based on Long Term Evolution signal system, only be illustrated with the division of above-mentioned each functional module, in practical application, can above-mentioned functions be distributed and completed by different functional modules as required, be divided into different functional modules by the internal structure of terminal, to complete all or part of function described above.In addition, the terminal that above-described embodiment provides belongs to same design with the wireless location method embodiment based on Long Term Evolution signal system, and its specific implementation process refers to embodiment of the method, repeats no more here.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can carry out the hardware that instruction is relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the wireless location method based on Long Term Evolution signal system, is characterized in that, described method comprises:
Terminal receives the pilot signal of base station transmission and carries the framing signal of navigation message, between the code phase of described framing signal and described pilot signal, there is default corresponding relation, described navigation message comprises locating information, and described locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at described base station place;
Slightly catch the initial phase site that obtains described framing signal according to described pilot signal, and dock according to the initial phase site of the default corresponding relation between the code phase of described framing signal and pilot signal and described framing signal the framing signal of receiving and process, obtain described framing signal incoming terminal the time of advent poor TDOA information and described framing signal in the navigation message that carries;
Determine current elevation information according to described navigation message and local atmospheric pressure value, according to described navigation message, described TDOA information is revised, and position according to described current elevation information and revised TDOA information.
2. method according to claim 1, it is characterized in that, the described initial phase site according to the default corresponding relation between the code phase of described framing signal and described pilot signal and described framing signal is docked the framing signal of receiving and is processed, differ from the navigation message carrying in TDOA information and described framing signal the time of advent that obtains described framing signal incoming terminal, specifically comprises:
Obtain the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of described framing signal, described framing signal and described pilot signal, and utilize frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis of the code phase rough estimate value of described each framing signal;
According to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the framing signal receiving is carried out to integration, tenacious tracking, and from tenacious tracking to described framing signal extract described framing signal incoming terminal the time of advent poor TDOA information and described framing signal in the navigation message that carries.
3. method according to claim 2, is characterized in that, code phase rough estimate value and the carrier frequency rough estimate value of each framing signal carried out integration, tenacious tracking to the framing signal receiving described in described basis, specifically comprises:
According to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilize the local correlation that code and described framing signal occur, the framing signal after peeling off and described local generation yard are carried out to integration;
According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of described each framing signal, and according to the accurate estimated value of the code phase of described each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
4. method according to claim 1, is characterized in that, the framing signal that carries navigation message that described reception base station sends, specifically comprises:
The framing signal that carries navigation message that receiving neighbor bs adopts different frequency to send;
Describedly determine current elevation information according to described navigation message and local atmospheric pressure value, specifically comprise:
Obtain the proportionate relationship between described current elevation information and local atmospheric pressure value according to the proportionate relationship between elevation information and the atmospheric pressure value at the described base station place comprising in described navigation message, determine described current elevation information according to the proportionate relationship between described current elevation information and local atmospheric pressure value and described local atmospheric pressure value;
Describedly according to described navigation message, described TDOA information is revised, is specifically comprised:
According to the described time synchronization error update information comprising in described navigation message, described TDOA information is revised.
5. a terminal, is characterized in that, described terminal comprises:
Receiver module, the framing signal that carries navigation message sending for receiving base station, described navigation message comprises locating information, and described locating information at least comprises elevation information, atmospheric pressure value and the time synchronization error update information at described base station place;
Acquisition module, the navigation message carrying for obtaining framing signal that described receiver module receives;
Locating module, the locating information comprising for the navigation message getting according to described acquisition module positions;
Described receiver module, the code division multiple access framing signal and the location reference signals pilot signal that send specifically for receiving base station, described framing signal is the framing signal that carries navigation message, between the code phase of described framing signal and described pilot signal, has default corresponding relation;
Described acquisition module, specifically comprises:
Catch submodule, slightly catch the initial phase site that obtains described framing signal for the pilot signal receiving according to described receiver module;
Process submodule, for according to the default corresponding relation between the code phase of described framing signal and pilot signal and described in catch the described framing signal that submodule obtains initial phase site dock the framing signal of receiving and processes, differ from the navigation message carrying in TDOA information and described framing signal the time of advent that obtains described framing signal incoming terminal;
Described locating module, specifically comprises:
Determine submodule, determine current elevation information for the navigation message and the local atmospheric pressure value that obtain according to described processing submodule;
Revise submodule, for the navigation message obtaining according to described processing submodule, described processing submodule is obtained to TDOA information and revise;
Locator module, positions for current elevation information and the revised TDOA information of described correction submodule determined according to described definite submodule.
6. terminal according to claim 5, is characterized in that, described processing submodule, specifically comprises:
The first estimation unit, for obtaining the code phase rough estimate value of each framing signal according to the default corresponding relation between the code phase of the initial phase site of described framing signal, described framing signal and described pilot signal;
The second estimation unit, utilizes frequency search to obtain the carrier frequency rough estimate value of each framing signal on the basis for the code phase rough estimate value of each framing signal of obtaining at described the first estimation unit;
Processing unit, for estimating that according to described the first estimation unit the code phase rough estimate value of each framing signal obtaining and described the second estimation unit estimate that the carrier frequency rough estimate value of each framing signal obtaining carries out integration, tenacious tracking to the framing signal receiving;
Extraction unit, for from described processing unit tenacious tracking to described framing signal extract described framing signal incoming terminal the time of advent poor TDOA information and described framing signal the navigation message that carries.
7. terminal according to claim 6, is characterized in that, described processing unit, specifically comprises:
Integration subelement, be used for according to the code phase rough estimate value of described each framing signal and carrier frequency rough estimate value, the carrier wave of the framing signal receiving is peeled off, and utilize the local correlation that code and described framing signal occur, the framing signal after peeling off and described local generation yard are carried out to integration;
Follow the tracks of subelement, encircle and carrier wave ring for the code according to the integrated value track loop of described integration subelement gained, obtain the accurate estimated value of code phase and the accurate estimated value of carrier frequency of described each framing signal, and according to the accurate estimated value of the code phase of described each framing signal and the accurate estimated value of carrier frequency, track loop is adjusted, realize tenacious tracking.
8. terminal according to claim 5, is characterized in that, described receiver module, the framing signal that carries navigation message that adopts different frequency to send specifically for receiving neighbor bs;
Described definite submodule, obtain the proportionate relationship between described current elevation information and local atmospheric pressure value specifically for the proportionate relationship between elevation information and the atmospheric pressure value at the described base station place that comprises in the navigation message obtaining according to described processing submodule, determine described current elevation information according to the proportionate relationship between described current elevation information and local atmospheric pressure value and described local atmospheric pressure value;
Described correction submodule, revises described TDOA information specifically for the described time synchronization error update information comprising in the navigation message obtaining according to described processing submodule.
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| CN106908757A (en) * | 2017-03-03 | 2017-06-30 | 北京航空航天大学 | A kind of method that single system realizes indoor and outdoor continuous precise positioning on a large scale |
| CN107277915A (en) * | 2017-05-15 | 2017-10-20 | 北京首科信通科技有限责任公司 | navigation locating method and device |
| CN107277766A (en) * | 2017-05-15 | 2017-10-20 | 北京首科信通科技有限责任公司 | navigation locating method and device |
| CN108337730B (en) * | 2018-02-01 | 2020-10-23 | 杭州中科微电子有限公司 | Method for realizing position positioning by using time-division synchronous rotating wave beam |
| CN112213746B (en) * | 2020-10-13 | 2024-07-09 | 北京首科信通科技有限责任公司 | Positioning method and device |
| CN113556682A (en) * | 2021-06-08 | 2021-10-26 | 深圳市纽瑞芯科技有限公司 | Pilot frequency deployed UWB positioning system and implementation method thereof |
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