CN102724754B - Wireless positioning method and base station - Google Patents
Wireless positioning method and base station Download PDFInfo
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Abstract
The invention discloses a wireless positioning method and a base station and belongs to the technical field of positioning. The wireless positioning method includes that the base station acquires navigation messages comprising positioning information, generates positioning signals with the navigation messages and transmits the positioning signals to a terminal so that the terminal can acquire the navigation messages in the positioning signals and realize positioning according to the positioning information in the navigation messages. The base station acquires the navigation messages comprising the positioning information and transmits the positioning signals with the navigation messages to the terminal, and accordingly, the terminal can automatic position according to the positioning information in the navigation messages, and further, computing load of servers can be reduced. Additionally, compared with the method of positioning in the OFDM (orthogonal frequency division multiplexing) modulation manner, the wireless positioning method can improve positioning accuracy and reduce positioning complexity.
Description
Technical field
The present invention relates to field of locating technology, particularly a kind of wireless location method and base station.
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 and base station.Described technical scheme is as follows:
On the one hand, provide a kind of wireless location method, described method comprises:
Base station obtains navigation message, comprises locating information in described navigation message;
Produce the framing signal of carrying described navigation message, produce pilot signal, and control producing the time of carrying the framing signal of described navigation message according to the time producing described pilot signal, make to be formed between the code phase of described framing signal and described pilot signal and preset corresponding relation;
Described framing signal is sent to terminal, makes described terminal obtain navigation message in described framing signal, to position according to the locating information in navigation message;
Described described framing signal is sent to terminal, specifically comprises:
Power control is carried out to described framing signal, makes the amplitude of described framing signal lower than the amplitude of described pilot signal;
Framing signal after carrying out power control is superposed with described pilot signal, and the signal after superposition is sent to terminal, obtain according to the default corresponding relation between the code phase of described framing signal and described pilot signal the navigation message carried in framing signal, to position according to described navigation message by described terminal.
Wherein, described locating information at least comprises: the elevation information of described base station and atmospheric pressure value, and/or time synchronization error update information;
Described base station obtains navigation message, specifically comprises:
By air pressure, the temperature at baroceptor base stations detected place, and/or pass through the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of described base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
Further, the framing signal of described navigation message is carried in described generation, specifically comprises:
Generate the spreading code needed for location, and utilize described spreading code to carry out spread spectrum to described navigation message, obtain the frequency expansion sequence carrying described navigation message, using described frequency expansion sequence as framing signal.
Further, described described framing signal is sent to terminal, specifically comprises:
Adopt the frequency different from adjacent base station that described framing signal is sent to terminal.
On the other hand, additionally provide a kind of base station, described base station comprises:
Acquisition module, for obtaining navigation message, comprises locating information in described navigation message;
First generation module, for generation of the framing signal of carrying the navigation message that described acquisition module gets;
Second generation module, for generation of pilot signal;
Control module, time for producing pilot signal according to described second generation module controlled the time that the framing signal of described navigation message is carried in described first generation module generation, is formed and preset corresponding relation between the pilot signal that the code phase of the framing signal that described first generation module is produced and described second generation module produce;
Sending module, sends to terminal for the framing signal produced by described first generation module, makes described terminal obtain navigation message in described framing signal, to position according to the locating information in navigation message;
Described sending module, specifically comprises:
Control unit, for carrying out power control to described framing signal, makes the amplitude of described framing signal lower than the amplitude of described pilot signal;
Superpositing unit, superposes with described pilot signal for the framing signal after described control unit is carried out power control;
Transmitting element, for the signal after described superpositing unit superposition is sent to terminal, obtain according to the default corresponding relation between the code phase of described framing signal and described pilot signal the navigation message carried in framing signal, to position according to described navigation message by described terminal.
Wherein, the locating information comprised in the navigation message that described acquisition module gets at least comprises: the elevation information of described base station and atmospheric pressure value, and/or time synchronization error update information;
Described acquisition module, specifically for air pressure, temperature by baroceptor base stations detected place, and/or pass through the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of described base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
Further, described first generation module, specifically for generating the spreading code needed for location, and utilizing described spreading code to carry out spread spectrum to described navigation message, obtaining the frequency expansion sequence carrying described navigation message, using described frequency expansion sequence as framing signal.
Further, described sending module, sends to terminal specifically for adopting the frequency different from adjacent base station by described framing signal.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
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.
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 a kind of wireless location method flow chart that the embodiment of the present invention one provides;
Fig. 2 is a kind of wireless location method flow chart that the embodiment of the present invention two provides;
Fig. 3 is the structural representation of a kind of base station that the embodiment of the present invention three provides;
Fig. 4 is the structural representation of the another kind of base station that the embodiment of the present invention three provides;
Fig. 5 is the structural representation of a kind of sending module 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, 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.See Fig. 1, the method flow that the present embodiment provides is specific as follows:
101: base station obtains navigation message, and comprise locating information in this navigation message, this locating information at least comprises elevation information and the atmospheric pressure value of base station, and/or time synchronization error update information;
Wherein, base station obtains navigation message, specifically comprises:
By air pressure, the temperature at baroceptor base stations detected place, and/or by the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
102: produce the framing signal of carrying navigation message;
Produce the framing signal of carrying navigation message, specifically comprise:
Generate the spreading code needed for location, and utilize spreading code to carry out spread spectrum to navigation message, obtain the frequency expansion sequence carrying navigation message, using frequency expansion sequence as framing signal.
Further, when the framing signal of navigation message is carried in generation, also comprise:
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.
103: framing signal is sent to terminal, make the navigation message in terminal acquisition framing signal, to position according to the locating information in navigation message.
Wherein, 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.
Further, framing signal is sent to terminal, specifically comprises:
Adopt the frequency different from adjacent base station that framing signal is sent to terminal.
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.
In order to clearly set forth the wireless location method that above-described embodiment provides, in conjunction with foregoing, for following embodiment two, wireless location method being described in detail, referring to following embodiment two:
Embodiment two
Present embodiments providing a kind of wireless location method, 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 wireless location method.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 and the atmospheric pressure value of base station, and/or time synchronization error update information;
Wherein, when base station obtains navigation message, especially by air pressure, the temperature at baroceptor base stations detected place, and/or pass through the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of base station that detect, and/or time synchronized update information carries 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:
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:
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:
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, obtain the navigation message carried in TDOA (Time Difference of Arrival, the time of advent the is poor) 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 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 the TDOA information of CDMA frequency expansion sequence incoming terminal and 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, according to the code phase rough estimate value of each CDMA frequency expansion sequence and carrier frequency rough estimate value, integration, tenacious tracking are carried out to the CDMA frequency expansion sequence received, by extracting the difference TDOA information time of advent of CDMA frequency expansion sequence incoming terminal to the tenacious tracking of CDMA frequency expansion sequence, and from CDMA frequency expansion sequence, extract the navigation message carried in CDMA frequency expansion sequence.
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/or is revised TDOA information according to navigation message, and positions according to present level information and/or revised TDOA information.
Wherein, when terminal is according to navigation message and local atmospheric pressure value determination present level information, the present embodiment is 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.When revising TDOA information according to navigation message, the present embodiment does not limit correcting mode equally, for above-mentioned navigation message, can revise according to the time synchronization error update information comprised in navigation message to TDOA information.
About the mode that terminal positions according to present level information and/or revised TDOA information, the present embodiment is not specifically limited, and can realize during concrete enforcement according to the existing mode positioned according to elevation information, TDOA information.In addition, the method that the present embodiment provides, after positioning according to present level information and/or revised TDOA 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, 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 base station, this base station is for the function of the base station side in the wireless location method that performs above-described embodiment one and embodiment two and provide.See Fig. 3, this base station comprises:
Acquisition module 31, for obtaining navigation message, comprises locating information in this navigation message;
First generation module 32, for generation of the framing signal of carrying the navigation message that acquisition module 31 gets;
Sending module 33, sends to terminal for the framing signal produced by the first generation module 32, makes the navigation message in terminal acquisition framing signal, to position according to the locating information in navigation message.
Wherein, the locating information comprised in the navigation message that acquisition module 31 gets at least comprises: the elevation information of base station and atmospheric pressure value, and/or time synchronization error update information;
Acquisition module 31, specifically for by air pressure, the temperature at baroceptor base stations detected place, and/or by the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
First generation module 32, specifically for generating the spreading code needed for location, and utilizing spreading code to carry out spread spectrum to navigation message, obtaining the frequency expansion sequence carrying navigation message, using frequency expansion sequence as framing signal.
See Fig. 4, this base station, also comprises:
Second generation module 34, for generation of pilot signal;
Control module 35, time for producing pilot signal according to the second generation module 34 controlled the time that the framing signal of navigation message is carried in the first generation module 32 generation, is formed and preset corresponding relation between the pilot signal that the code phase of the framing signal that the first generation module 32 is produced and the second generation module 34 produce;
Further, see Fig. 5, sending module 33, specifically comprises:
Control unit 331, for carrying out power control to framing signal, makes the amplitude of amplitude lower than pilot signal of framing signal;
Superpositing unit 332, superposes with pilot signal for the framing signal after control unit 331 is carried out power control;
Transmitting element 333, sends to terminal for the signal after being superposed by superpositing unit 332, obtains the navigation message carried in framing signal, to position according to navigation message by terminal according to the default corresponding relation between the code phase of framing signal and pilot signal.
Further, sending module 33, sends to terminal specifically for adopting the frequency different from adjacent base station by framing signal.
The base station 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.
It should be noted that: the base station that above-described embodiment provides is when wireless location, 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 base station is divided into different functional modules, to complete all or part of function described above.In addition, the base station that above-described embodiment provides and wireless location method embodiment belong to same design, 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. a wireless location method, is characterized in that, described method comprises:
Base station obtains navigation message, comprises locating information in described navigation message;
Produce the framing signal of carrying described navigation message, produce pilot signal, and control producing the time of carrying the framing signal of described navigation message according to the time producing described pilot signal, make to be formed between the code phase of described framing signal and described pilot signal and preset corresponding relation;
Described framing signal is sent to terminal, makes described terminal obtain navigation message in described framing signal, to position according to the locating information in navigation message;
Described described framing signal is sent to terminal, specifically comprises:
Power control is carried out to described framing signal, makes the amplitude of described framing signal lower than the amplitude of described pilot signal;
Framing signal after carrying out power control is superposed with described pilot signal, and the signal after superposition is sent to terminal, obtain according to the default corresponding relation between the code phase of described framing signal and described pilot signal the navigation message carried in framing signal, to position according to described navigation message by described terminal.
2. method according to claim 1, is characterized in that, described locating information at least comprises: the elevation information of described base station and atmospheric pressure value, and/or time synchronization error update information;
Described base station obtains navigation message, specifically comprises:
By air pressure, the temperature at baroceptor base stations detected place, and/or pass through the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of described base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
3. method according to claim 1, is characterized in that, the framing signal of described navigation message is carried in described generation, specifically comprises:
Generate the spreading code needed for location, and utilize described spreading code to carry out spread spectrum to described navigation message, obtain the frequency expansion sequence carrying described navigation message, using described frequency expansion sequence as framing signal.
4. the method according to claim arbitrary in claims 1 to 3, is characterized in that, described described framing signal is sent to terminal, specifically comprises:
Adopt the frequency different from adjacent base station that described framing signal is sent to terminal.
5. a base station, is characterized in that, described base station comprises:
Acquisition module, for obtaining navigation message, comprises locating information in described navigation message;
First generation module, for generation of the framing signal of carrying the navigation message that described acquisition module gets;
Second generation module, for generation of pilot signal;
Control module, time for producing pilot signal according to described second generation module controlled the time that the framing signal of described navigation message is carried in described first generation module generation, is formed and preset corresponding relation between the pilot signal that the code phase of the framing signal that described first generation module is produced and described second generation module produce;
Sending module, sends to terminal for the framing signal produced by described first generation module, makes described terminal obtain navigation message in described framing signal, to position according to the locating information in navigation message;
Described sending module, specifically comprises:
Control unit, for carrying out power control to described framing signal, makes the amplitude of described framing signal lower than the amplitude of described pilot signal;
Superpositing unit, superposes with described pilot signal for the framing signal after described control unit is carried out power control;
Transmitting element, for the signal after described superpositing unit superposition is sent to terminal, obtain according to the default corresponding relation between the code phase of described framing signal and described pilot signal the navigation message carried in framing signal, to position according to described navigation message by described terminal.
6. base station according to claim 5, is characterized in that, the locating information comprised in the navigation message that described acquisition module gets at least comprises: the elevation information of described base station and atmospheric pressure value, and/or time synchronization error update information;
Described acquisition module, specifically for air pressure, temperature by baroceptor base stations detected place, and/or pass through the synchronous update information of clock acquisition time of base station, by air pressure, the temperature of described base station that detect, and/or time synchronized update information carries out text framing, obtains navigation message.
7. base station according to claim 5, it is characterized in that, described first generation module, specifically for generating the spreading code needed for location, and utilize described spreading code to carry out spread spectrum to described navigation message, obtain the frequency expansion sequence carrying described navigation message, using described frequency expansion sequence as framing signal.
8. the base station according to claim arbitrary in claim 5 to 7, is characterized in that, described sending module, specifically for adopting the frequency different from adjacent base station, described framing signal is sent to terminal.
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| CN107765219B (en) * | 2016-08-19 | 2023-05-05 | 中兴通讯股份有限公司 | Method, device and system for radio positioning measurement |
| 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 |
| CN112213746A (en) * | 2020-10-13 | 2021-01-12 | 北京首科信通科技有限责任公司 | Positioning method and device |
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| CN101616482A (en) * | 2009-07-31 | 2009-12-30 | 北京邮电大学 | Localization method in a kind of mobile communication system and portable terminal, location-server |
| CN102076003A (en) * | 2010-12-13 | 2011-05-25 | 北京邮电大学 | Locating demodulation chip for mobile broadcasting signal |
| CN102104837A (en) * | 2010-12-13 | 2011-06-22 | 北京邮电大学 | Positioning method and device based on mobile broadcasting |
| CN102307328A (en) * | 2011-08-22 | 2012-01-04 | 北京邮电大学 | Positioning signal generation method, transmitter and positioning system |
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