CN102724752B - Height difference-based wireless positioning method and terminal - Google Patents

Abstract

The invention discloses a height difference-based wireless positioning method and a terminal and belongs to the technical field of positioning. The method comprises the following steps of: receiving a positioning signal by the terminal, wherein the positioning signal carries a navigation message and is sent by a base station and the navigation message comprises positioning information, and the positioning information at least comprises the height information and air pressure value of the base station; and acquiring the navigation message carried in the positioning signal, and positioning according to the positioning information contained in the navigation message. According to the invention, the positioning signal carrying the navigation message and transmitted by the base station is received, the navigation message is acquired according to the positioning signal, and automatic positioning can be realized according to the positioning information in the navigation message, so that the computational burden of a server counter is reduced. In addition, compared with positioning through an orthogonal frequency division multiplexing (OFDM) modulation mode, the method provided by the embodiment of the invention can improve the positioning accuracy and reduce the positioning complexity.

Description

Based on wireless location method and the terminal of height difference

Technical field

The present invention relates to field of locating technology, particularly a kind of wireless location method based on height difference and terminal.

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 signal, as Chirp signal, Zigbee (purple honeybee) signal, UWB (Ultra Wideband, ultra broadband) pilot signal in signal and communication system, make wireless location to be applied to different field, enrich the life of people.How to improve the precision of wireless location, allow its better services in masses are emphasis of wireless location research.

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, carry out solution signal correction operation, obtain multiple time delay reaching base station, positional parameter (time delay) is asked return service platform, realizes 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 needs positional parameter return service platform, positioned by information desk, and terminal cannot independently be located, amount of calculation is entirely in information desk side, cause information desk to be difficult to support the parallel location of mass users, real-time statistics customer position information is comparatively difficult; In addition, locating information passback real-time performance is difficult to ensure, cause many filtering algorithm effects to be difficult to arrive optimum state, affect positioning precision, and adopt OFDM modulation pattern, distance measuring method is complicated.

Summary of the invention

While independently locating to enable terminal, improving positioning precision, reducing the computation burden of location complexity and information desk, embodiments providing a kind of wireless location method based on height difference and terminal.Described technical scheme is as follows:

On the one hand, provide a kind of wireless location method based on height difference, described method comprises:

Terminal receives the pilot signal that base station sends and the framing signal carrying 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, the atmospheric pressure value of described base station;

Obtain the navigation message carried in described framing signal, and position according to the locating information comprised in described navigation message;

Wherein, the navigation message carried in the described framing signal of described acquisition, specifically comprises:

The initial phase site obtaining described framing signal is slightly caught according to described pilot signal, and dock according to the initial phase site of the code phase of described framing signal and the default corresponding relation between pilot signal and described framing signal the framing signal received and process, obtain the navigation message carried in described framing signal;

The described locating information according to comprising in described navigation message positions, and specifically comprises:

According to described navigation message and local atmospheric pressure value determination present level information, and position according to described present level information.

Further, the initial phase site of the described code phase according to described framing signal and the default corresponding relation between described pilot signal and described framing signal is docked the framing signal received and is processed, obtain the navigation message carried in described framing signal, specifically comprise:

Obtain the code phase rough estimate value of each framing signal according to the initial phase site of described framing signal, default corresponding relation between the code phase of described framing signal and described pilot signal, and on the basis of the code phase rough estimate value of each framing signal described, utilize frequency search to obtain the carrier frequency rough estimate value of each framing signal;

According to the code phase rough estimate value of each framing signal described and carrier frequency rough estimate value, integration, tenacious tracking are carried out to the framing signal received, and from tenacious tracking to described framing signal extract the navigation message carried in described framing signal.

Further, code phase rough estimate value and the carrier frequency rough estimate value of each framing signal described in described basis carry out integration, tenacious tracking to the framing signal received, and specifically comprise:

According to code phase rough estimate value and the carrier frequency rough estimate value of each framing signal described, the carrier wave of the framing signal received is peeled off, and utilize the local correlation that code and described framing signal occur, be there is code in the framing signal after stripping and described this locality and carry out integration;

According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal described, and according to the code phase fine estimation of each framing signal described and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

Further, the framing signal carrying navigation message that described reception base station sends, specifically comprises:

The framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

Described according to described navigation message and local atmospheric pressure value determination present level information, specifically comprise:

Obtain the proportionate relationship between described present level information and local atmospheric pressure value according to the proportionate relationship between the elevation information of the described base station comprised in described navigation message and atmospheric pressure value, determine described present level information according to the proportionate relationship between described present level information and local atmospheric pressure value and described local atmospheric pressure value.

On the other hand, additionally provide a kind of terminal, described terminal comprises:

Receiver module, for receiving the pilot signal that base station sends and the framing signal carrying 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, the atmospheric pressure value of described base station;

Acquisition module, for obtaining the navigation message carried in framing signal that described receiver module receives;

Locating module, positions for the locating information comprised in the navigation message that gets according to described acquisition module;

Wherein, described acquisition module, specifically comprises:

Catch submodule, the pilot signal for receiving according to described receiver module slightly catches the initial phase site obtaining described framing signal;

Process submodule, for according to the code phase of described framing signal and the default corresponding relation between pilot signal and described in catch the described framing signal that submodule obtains initial phase site dock the framing signal received and process, obtain the navigation message carried in described framing signal;

Described locating module, specifically comprises:

Determine submodule, for the navigation message that obtains according to described process submodule and local atmospheric pressure value determination present level information;

Locator module, for positioning according to the described present level information determining that submodule is determined.

Further, described process submodule, specifically comprises:

First estimation unit, for obtaining the code phase rough estimate value of each framing signal according to the initial phase site of described framing signal, default corresponding relation between the code phase of described framing signal and described pilot signal;

Second estimation unit, utilizes 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 obtained at described first estimation unit;

For the code phase rough estimate value and described second estimation unit estimating each framing signal obtained according to described first estimation unit, processing unit, estimates that the carrier frequency rough estimate value of each framing signal obtained carries out integration, tenacious tracking to the framing signal received;

Extraction unit, for from described processing unit tenacious tracking to described framing signal in extract the navigation message carried in described framing signal.

Further, described processing unit, specifically comprises:

Integration subelement, for according to the code phase rough estimate value of each framing signal described and carrier frequency rough estimate value, the carrier wave of the framing signal received is peeled off, and utilize the local correlation that code and described framing signal occur, be there is code in the framing signal after stripping and described this locality and carry out integration;

Follow the tracks of subelement, for code ring and the carrier wave ring of the integrated value track loop according to described integration subelement gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal described, and according to the code phase fine estimation of each framing signal described and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

Further, described receiver module, specifically for the framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

Describedly determine submodule, obtain the proportionate relationship between described present level information and local atmospheric pressure value specifically for the proportionate relationship between the elevation information of described base station that comprises in the navigation message that obtains according to described process submodule and atmospheric pressure value, determine described present level information according to the proportionate relationship between described present level information and local atmospheric pressure value and described local atmospheric pressure value.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

By receiving the framing signal carrying navigation message that base station sends, obtaining navigation message according to framing signal, and can independently locate according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with realizing location with employing OFDM modulation pattern, the method that the present embodiment provides can improve positioning precision, reduces location complexity.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment 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, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the wireless location method flow chart based on height difference that the embodiment of the present invention one provides;

Fig. 2 is the wireless location method flow chart based on height difference that the embodiment of the present invention two provides;

Fig. 3 is the structural representation of the terminal that the embodiment of the present invention three provides;

Fig. 4 is the structural representation of the acquisition module that the embodiment of the present invention three provides;

Fig. 5 is the structural representation of the locating module that the embodiment of the present invention three provides;

Fig. 6 is the structural representation of the process submodule that the embodiment of the present invention three provides;

Fig. 7 is the structural representation of the processing unit that the embodiment of the present invention three provides.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

Embodiment one

Present embodiments provide a kind of wireless location method based on height difference, the method is by improving LTE (Long Term Evolution, Long Term Evolution) signal system, make base station have the function sending and carry the framing signal of 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 of base station in navigation message, make terminal by the elevation information of base station, atmospheric pressure value and local atmospheric pressure value determination present level information, to position according to present level information.See Fig. 1, the method flow that the present embodiment provides is specific as follows:

101: terminal receives the framing signal carrying navigation message that base station sends, and this navigation message comprises locating information, and this locating information at least comprises elevation information, the atmospheric pressure value of base station;

Wherein, terminal receives the framing signal carrying navigation message that base station sends, and specifically comprises:

Terminal receives the pilot signal that base station sends and the framing signal carrying navigation message, has default corresponding relation between the code phase of framing signal and pilot signal.

102: obtain the navigation message carried in framing signal;

Wherein, obtain the navigation message carried in framing signal, specifically comprise:

The initial phase site obtaining framing signal is slightly caught according to pilot signal, and dock according to the initial phase site of the code phase of framing signal and the default corresponding relation between pilot signal and framing signal the framing signal received and process, obtain the navigation message carried in framing signal.

Further, dock according to the initial phase site of the code phase of framing signal and the default corresponding relation between pilot signal and framing signal the framing signal received and process, obtain the navigation message carried in framing signal, specifically comprise:

Obtain the code phase rough estimate value of each framing signal according to the initial phase site of framing signal, default corresponding relation between the code phase of framing signal and pilot signal, and on the basis of the code phase rough estimate value of each framing signal, utilize frequency search to obtain the carrier frequency 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, integration, tenacious tracking are carried out to the framing signal received, and from tenacious tracking to framing signal extract the navigation message carried in framing signal.

Further, according to the code phase rough estimate value of each framing signal and carrier frequency rough estimate value, integration, tenacious tracking are carried out to the framing signal received, specifically comprise:

According to code phase rough estimate value and the carrier frequency rough estimate value of each framing signal, the carrier wave of the framing signal received is peeled off, and the local correlation that code and framing signal occur of utilization, be there is code with this locality in the framing signal after stripping and carry out integration;

According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal, and according to the code phase fine estimation of each framing signal and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

103: the locating information according to comprising in navigation message positions.

Wherein, the locating information according to comprising in navigation message positions, and specifically comprises:

According to navigation message and local atmospheric pressure value determination present level information, and position according to present level information.

Further, receive the framing signal carrying navigation message that base station sends, specifically comprise:

The framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

According to navigation message and local atmospheric pressure value determination present level information, specifically comprise:

The proportionate relationship between present level information and local atmospheric pressure value is obtained, according to the proportionate relationship between present level information and local atmospheric pressure value and local atmospheric pressure value determination present level information according to the proportionate relationship between the elevation information of the base station comprised in navigation message and atmospheric pressure value.

The method that the present embodiment provides, by receiving the framing signal carrying navigation message that base station sends, obtaining navigation message according to framing signal, and can independently locate according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with realizing location with employing OFDM modulation pattern, the method that the present embodiment provides can improve positioning precision, reduces location complexity.

In order to clearly set forth the wireless location method based on height difference that above-described embodiment provides, in conjunction with foregoing, for following embodiment two, the wireless location method based on height difference being described in detail, referring to following embodiment two:

Embodiment two

Present embodiments providing a kind of wireless location method based on height difference, the content that the method provides in conjunction with above-described embodiment one, by improving LTE signal system, under the prerequisite ensureing positioning precision, making terminal realize autonomous location.For convenience of explanation, the present embodiment take framing signal as CDMA (Code Division Multiple Access, code division multiple access) frequency expansion sequence, and pilot signal is PRS is example, is illustrated the wireless location method based on height difference.See Fig. 2, the method flow that the present embodiment provides is specific as follows:

201: base station obtains navigation message, and comprise locating information in this navigation message, this locating information at least comprises elevation information, the atmospheric pressure value of base station;

Wherein, when base station obtains navigation message, especially by air pressure, the temperature at baroceptor base stations detected place, the air pressure of the base station detected, temperature are carried out text framing, obtains navigation message.

The present embodiment does not limit the mode that base station obtains navigation message, navigation message is except comprising above-mentioned locating information, the information such as Base Station Identification, base station position information and CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC) code) check digit can also be comprised; Certainly, in addition to the above, navigation message can also comprise other guide, and the present embodiment does not limit the particular content of navigation message.

202: base station produces the CDMA frequency expansion sequence carrying 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 carrying the CDMA frequency expansion sequence of navigation message, specifically includes but not limited to as under type:

Generate the spreading code needed for location, and utilize spreading code to carry out spread spectrum to the navigation message obtained, obtain the frequency expansion sequence carrying navigation message, this frequency expansion sequence can be used as framing signal.During concrete enforcement, the navigation message of default size can be carried in the frequency expansion sequence every Preset Time, such as, 1bit (bit) navigation message is being carried in the frequency expansion sequence of 10 milliseconds, certainly, except Preset Time is set as 10 milliseconds, default size is set as outside 1bit, Preset Time and default size can also take other values, and the present embodiment does not limit Preset Time and default size.Base station is when the CDMA frequency expansion sequence of navigation message is carried in generation, and the method that the present embodiment provides also comprises:

Produce pilot signal, and control producing the time of carrying the framing signal of navigation message according to the time producing pilot signal, make to be formed between the code phase of framing signal and pilot signal to preset corresponding relation;

Correspondingly, framing signal is sent to terminal, specifically comprises:

Power control is carried out to framing signal, makes the amplitude of amplitude lower than pilot signal of framing signal;

Framing signal after carrying out power control is superposed with pilot signal, and the signal after superposition is sent to terminal, the navigation message carried in framing signal is obtained, to position according to navigation message according to the default corresponding relation between the code phase of framing signal and pilot signal by terminal.

Wherein, base station produces the mode of PRS, and specifically can realize according to existing implementation, the present embodiment does not do concrete restriction to this.Why CDMA frequency expansion sequence and PRS are sent to terminal in the lump, after CDMA frequency expansion sequence in order to make terminal receive at subsequent step and PRS, navigation message can be obtained according to the default corresponding relation had 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 had between the code phase of CDMA frequency expansion sequence and PRS, such as, can to align or tail aligns for the first place of CDMA frequency expansion sequence and PRS carry out head.Certainly, except the default corresponding relations such as head alignment or tail alignment, can also adopt other corresponding relations, the present embodiment does not do concrete restriction to this.

The method provided due to the present embodiment has carried out power control to framing signal, make the amplitude of amplitude lower than pilot signal of framing signal, therefore, CDMA frequency expansion sequence energy is low, such as, lower than ofdm signal 18dB (decibel), thus do not affect the proper communication of the ofdm signal comprising PRS signal.And PRS sequence is produced by pseudo random sequence c (i), be designated as be expressed as:

$r_{{l,n}_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),m=\mathrm{0,1},...,2N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1$

Wherein, l is OFDM symbol sequence number in a time slot, n _sthe timeslot number of downlink wireless frame, it is the maximum Physical Resource Block number of down link.Before each subframe starts, PN (Pseudo_Noise, pseudorandom) sequence generator all needs to carry out initialization, and initializing expression is:

$c_{\mathrm{init}}=2^{10}\·(7\·(n_s+1)+l+1)\·(2\·N_{\mathrm{ID}}^{\mathrm{cell}}+1)+2\·N_{\mathrm{ID}}^{\mathrm{cell}}+N_{\mathrm{CP}}$

Wherein, in standard C P (Cyclic Prefix, Cyclic Prefix) situation, in expansion CP situation,

PRS sequence needs to be mapped to resource particle, and the modulation symbol that copies be mapped to is:

$a_{k,l}^{\left(p\right)}=r_{{l,n}_s}\left(m^{\′}\right)$

Wherein, p is antenna end slogan, and in agreement, setting is 6.

Base station is sent to the mode of CDMA frequency expansion sequence and PRS, the present embodiment is not specifically limited.In order to reduce the interference sending 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.Such as, 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 the LTE of 20M bandwidth, and the present embodiment does not limit the concrete frequency that base station sends CDMA frequency expansion sequence.

203: terminal receives CDMA frequency expansion sequence and the PRS of base station transmission;

Wherein, terminal receive base station send CDMA frequency expansion sequence time, can receiving neighbor bs adopt different frequency send CDMA frequency expansion sequence.Locating information is comprised in the navigation message that this CDMA frequency expansion sequence carries.

204: terminal slightly catches the initial phase site obtaining CDMA frequency expansion sequence according to PRS;

For this step, the present embodiment does not limit the mode that PRS slightly catches, and when specifically implementing, slightly can catch according to existing thick acquisition mode to PRS.After slightly catching PRS, slightly catch the initial phase site that result can obtain 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 code phase of CDMA frequency expansion sequence and the default corresponding relation between PRS and CDMA frequency expansion sequence the CDMA frequency expansion sequence received and processed, and obtains the navigation message carried in CDMA frequency expansion sequence;

Particularly, the present embodiment does not dock according to the initial phase site of the code phase of CDMA frequency expansion sequence and the default corresponding relation between PRS and CDMA frequency expansion sequence the CDMA frequency expansion sequence received to terminal and processes, the mode obtaining the navigation message carried in CDMA frequency expansion sequence limits, only as follows for example is described:

First, obtain the code phase rough estimate value of each CDMA frequency expansion sequence according to the initial phase site of CDMA frequency expansion sequence, default corresponding relation between the code phase of CDMA frequency expansion sequence and PRS, and on the basis of the code phase rough estimate value of each CDMA frequency expansion sequence, utilize frequency search to obtain the carrier frequency rough estimate value of each CDMA frequency expansion sequence;

Secondly, integration, tenacious tracking are carried out to the CDMA frequency expansion sequence received, by extracting to the tenacious tracking of CDMA frequency expansion sequence the navigation message carried in CDMA frequency expansion sequence from CDMA frequency expansion sequence according to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value.

When carrying out integration, tenacious tracking according to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value to the CDMA frequency expansion sequence received, include but not limited to following implementation:

According to code phase rough estimate value and the carrier frequency rough estimate value of each CDMA frequency expansion sequence, utilize the local correlation that code and CDMA frequency expansion sequence occur, the CDMA frequency expansion sequence received and carrier wave are peeled off, and the CDMA frequency expansion sequence after peeling off code is occurred carries out integration with local;

According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain code phase fine estimation and the carrier frequency fine estimation of each CDMA frequency expansion sequence, and according to the code phase fine estimation of each CDMA frequency expansion sequence and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

Wherein, the CDMA frequency expansion sequence after peeling off the mode that code carries out integration is occurred can realize according to existing integral way with local, and this enforcement is not specifically limited this.

206: terminal according to navigation message and local atmospheric pressure value determination present level information, and positions according to present level information.

Wherein, when terminal is according to navigation message and local atmospheric pressure value determination present level information, the present embodiment is equally to determining that mode limits, for above-mentioned navigation message, proportionate relationship between the elevation information of the base station that can comprise according to the locating information in navigation message and atmospheric pressure value obtains the proportionate relationship between present level information and local atmospheric pressure value, according to the proportionate relationship between present level information and local atmospheric pressure value and local atmospheric pressure value determination present level information.Such as, the elevation information of base station is X, and atmospheric pressure value is Y, and present level information is M, and local atmospheric pressure value is N, X/Y=M/N, then, when X, Y, N are known, can obtain present level information M.The present embodiment is not to elevation information, the atmospheric pressure value of base station, and the concrete size of local atmospheric pressure value limits.When obtaining local atmospheric pressure value, carry out measurement by local baroceptor and obtain.

About the mode that terminal positions according to present level information, the present embodiment is not specifically limited, and can realize during concrete enforcement according to the existing mode positioned according to elevation information.In addition, the method that the present embodiment provides, after positioning according to present level information, also comprises step positioning result being back to information desk, so that information desk can carry out other location-based service according to this positioning result, such as, and position enquiring etc.

The method that the present embodiment provides, the navigation message comprising locating information is obtained by base station, and this navigation message is carried in framing signal sends to terminal, terminal is independently located according to the locating information in navigation message, and then reduces the computation burden of information desk; In addition, compared with realizing location with employing OFDM modulation pattern, the method that the present embodiment provides can improve positioning precision, reduces location complexity.

Embodiment three

Present embodiments provide a kind of terminal, this terminal for perform that above-described embodiment one and embodiment two provide based on the end side function in the wireless location method of height difference.See Fig. 3, this terminal comprises:

Receiver module 31, for receiving the framing signal carrying navigation message that base station sends, navigation message comprises locating information, and locating information at least comprises elevation information, the atmospheric pressure value of base station;

Acquisition module 32, for obtaining the navigation message carried in framing signal that receiver module 31 receives;

Locating module 33, positions for the locating information comprised in the navigation message that gets according to acquisition module 32.

Wherein, receiver module 31, specifically for receiving the pilot signal that base station sends and the framing signal carrying navigation message, has default corresponding relation between the code phase of framing signal and pilot signal;

See Fig. 4, this acquisition module 32, specifically comprises:

Catch submodule 321, the pilot signal for receiving according to receiver module 31 slightly catches the initial phase site obtaining framing signal;

Process submodule 322, processing for docking according to the code phase of framing signal and the default corresponding relation between pilot signal and the initial phase site of catching the framing signal that submodule 321 obtains the framing signal received, obtaining the navigation message carried in framing signal;

See Fig. 5, this locating module 33, specifically comprises:

Determine submodule 331, for according to the process navigation message that obtains of submodule 322 and local atmospheric pressure value determination present level information;

Locator module 332, for according to determining that the present level information that submodule 331 is determined positions.

See Fig. 6, process submodule 322, specifically comprises:

First estimation unit 3221, for obtaining the code phase rough estimate value of each framing signal according to the initial phase site of framing signal, default corresponding relation between the code phase of framing signal and pilot signal;

Second estimation unit 3222, utilizes 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 obtained at the first estimation unit 3221;

For the code phase rough estimate value of each framing signal estimating to obtain according to the first estimation unit 3221 and the second estimation unit 3222, processing unit 3223, estimates that the carrier frequency rough estimate value of each framing signal obtained carries out integration, tenacious tracking to the framing signal received;

Extraction unit 3224, for from processing unit 3223 tenacious tracking to framing signal in extract the navigation message carried in framing signal.

See Fig. 7, processing unit 3223, specifically comprises:

Integration subelement 3223a, 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 received is peeled off, and the local correlation that code and framing signal occur of utilization, be there is code with this locality in the framing signal after stripping and carry out integration;

Follow the tracks of subelement 3223b, for code ring and the carrier wave ring of the integrated value track loop according to integration subelement 3223a gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal, and according to the code phase fine estimation of each framing signal and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

Further, receiver module 31, specifically for the framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

Determine submodule 331, specifically for obtaining the proportionate relationship between present level information and local atmospheric pressure value according to the proportionate relationship between the elevation information of the base station comprised in the navigation message that obtains of process submodule 322 and atmospheric pressure value, according to the proportionate relationship between present level information and local atmospheric pressure value and local atmospheric pressure value determination present level information.

The terminal that the present embodiment provides, by receiving the framing signal of carrying navigation message that base station sends, obtain the navigation message comprising locating information according to this framing signal, realize independently locating according to the locating information in navigation message, and then reduce the computation burden of information desk; In addition, compared with realizing location with employing OFDM modulation pattern, 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 when carrying out the wireless location based on height difference, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by terminal is divided into different functional modules, 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 height difference, 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 realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. based on a wireless location method for height difference, it is characterized in that, described method comprises:

Terminal receives the pilot signal that base station sends and the framing signal carrying 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, the atmospheric pressure value of described base station;

Obtain the navigation message carried in described framing signal, and position according to the locating information comprised in described navigation message;

Wherein, the navigation message carried in the described framing signal of described acquisition, specifically comprises:

The initial phase site obtaining described framing signal is slightly caught according to described pilot signal, and dock according to the initial phase site of the code phase of described framing signal and the default corresponding relation between pilot signal and described framing signal the framing signal received and process, obtain the navigation message carried in described framing signal;

The described locating information according to comprising in described navigation message positions, and specifically comprises:

According to described navigation message and local atmospheric pressure value determination present level information, and position according to described present level information.

2. method according to claim 1, it is characterized in that, the initial phase site of the described code phase according to described framing signal and the default corresponding relation between described pilot signal and described framing signal is docked the framing signal received and is processed, obtain the navigation message carried in described framing signal, specifically comprise:

Obtain the code phase rough estimate value of each framing signal according to the initial phase site of described framing signal, default corresponding relation between the code phase of described framing signal and described pilot signal, and on the basis of the code phase rough estimate value of each framing signal described, utilize frequency search to obtain the carrier frequency rough estimate value of each framing signal;

According to the code phase rough estimate value of each framing signal described and carrier frequency rough estimate value, integration, tenacious tracking are carried out to the framing signal received, and from tenacious tracking to described framing signal extract the navigation message carried in described framing signal.

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 described in described basis carry out integration, tenacious tracking to the framing signal received, and specifically comprise:

According to code phase rough estimate value and the carrier frequency rough estimate value of each framing signal described, the carrier wave of the framing signal received is peeled off, and utilize the local correlation that code and described framing signal occur, be there is code in the framing signal after stripping and described this locality and carry out integration;

According to code ring and the carrier wave ring of the integrated value track loop of gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal described, and according to the code phase fine estimation of each framing signal described and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

4. method according to claim 1, is characterized in that, the framing signal carrying navigation message that described reception base station sends, and specifically comprises:

The framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

Described according to described navigation message and local atmospheric pressure value determination present level information, specifically comprise:

Obtain the proportionate relationship between described present level information and local atmospheric pressure value according to the proportionate relationship between the elevation information of the described base station comprised in described navigation message and atmospheric pressure value, determine described present level information according to the proportionate relationship between described present level information and local atmospheric pressure value and described local atmospheric pressure value.

5. a terminal, is characterized in that, described terminal comprises:

Receiver module, for receiving the pilot signal that base station sends and the framing signal carrying 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, the atmospheric pressure value of described base station;

Acquisition module, for obtaining the navigation message carried in framing signal that described receiver module receives;

Locating module, positions for the locating information comprised in the navigation message that gets according to described acquisition module;

Wherein, described acquisition module, specifically comprises:

Catch submodule, the pilot signal for receiving according to described receiver module slightly catches the initial phase site obtaining described framing signal;

Process submodule, for according to the code phase of described framing signal and the default corresponding relation between pilot signal and described in catch the described framing signal that submodule obtains initial phase site dock the framing signal received and process, obtain the navigation message carried in described framing signal;

Described locating module, specifically comprises:

Determine submodule, for the navigation message that obtains according to described process submodule and local atmospheric pressure value determination present level information;

Locator module, for positioning according to the described present level information determining that submodule is determined.

6. terminal according to claim 5, is characterized in that, described process submodule, specifically comprises:

First estimation unit, for obtaining the code phase rough estimate value of each framing signal according to the initial phase site of described framing signal, default corresponding relation between the code phase of described framing signal and described pilot signal;

Second estimation unit, utilizes 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 obtained at described first estimation unit;

For the code phase rough estimate value and described second estimation unit estimating each framing signal obtained according to described first estimation unit, processing unit, estimates that the carrier frequency rough estimate value of each framing signal obtained carries out integration, tenacious tracking to the framing signal received;

Extraction unit, for from described processing unit tenacious tracking to described framing signal in extract the navigation message carried in described framing signal.

7. terminal according to claim 6, is characterized in that, described processing unit, specifically comprises:

Integration subelement, for according to the code phase rough estimate value of each framing signal described and carrier frequency rough estimate value, the carrier wave of the framing signal received is peeled off, and utilize the local correlation that code and described framing signal occur, be there is code in the framing signal after stripping and described this locality and carry out integration;

Follow the tracks of subelement, for code ring and the carrier wave ring of the integrated value track loop according to described integration subelement gained, obtain code phase fine estimation and the carrier frequency fine estimation of each framing signal described, and according to the code phase fine estimation of each framing signal described and carrier frequency fine estimation, track loop is adjusted, realize tenacious tracking.

8. terminal according to claim 5, is characterized in that, described receiver module, specifically for the framing signal carrying navigation message that receiving neighbor bs adopts different frequency to send;

Describedly determine submodule, obtain the proportionate relationship between described present level information and local atmospheric pressure value specifically for the proportionate relationship between the elevation information of described base station that comprises in the navigation message that obtains according to described process submodule and atmospheric pressure value, determine described present level information according to the proportionate relationship between described present level information and local atmospheric pressure value and described local atmospheric pressure value.