CN204009079U - Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver - Google Patents
Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver Download PDFInfo
- Publication number
- CN204009079U CN204009079U CN201420173665.8U CN201420173665U CN204009079U CN 204009079 U CN204009079 U CN 204009079U CN 201420173665 U CN201420173665 U CN 201420173665U CN 204009079 U CN204009079 U CN 204009079U
- Authority
- CN
- China
- Prior art keywords
- navigation
- signal
- frequency
- broadcast
- enhancing information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002708 enhancing effect Effects 0.000 claims abstract description 170
- 238000012545 processing Methods 0.000 claims description 37
- 238000004891 communication Methods 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 14
- 230000008054 signal transmission Effects 0.000 claims description 10
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 33
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 19
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 230000005055 memory storage Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000004807 localization Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The utility model provides a kind of differential position system.The utility model carries by one of stack transmitting on the FM frequency range broadcast singal in frequency-modulated broadcast transmitter transmitting the digital broadcast signal that described final navigation strengthens information, when having met navigation enhancing demand, by utilizing the switching of the second navigation enhancing information frequency-modulation broadcasting transmitter that navigation signal receiver comprises based on described final navigation enhancing information, effectively improve tradition and utilized the first navigation enhancing information to carry out the precision of the method for difference location, significantly improved sensitivity, precision and the availability of navigation signal receiver location.
Description
Technical field
The utility model relates to a kind of location technology, particularly a kind of differential position system, frequency-modulated broadcast transmitter, navigation signal receiver.
Background technology
At present, in worldwide, the digitized process of radio and television tentatively completes.Terrestrial DTV, mobile TV have entered the stable development stage, and the digitizing of CATV (cable television) commercialization has been for many years.Digitizing has brought more high-quality program making, send and receive, meanwhile, makes user enjoy the more user of high-quality and experiences.In the digitizing of many media such as film, TV, cellphone multimedia, obtain in remarkable achievement, the digitizing of audio broadcasting seems and relatively lags behind, but this has also brought a development opportunity, i.e. the digitizing in audio broadcasting field is well worth doing.Digital technology is applied to audio broadcasting and can brings the reception of high stable and the tonequality of high-fidelity, simultaneously, can support many broadcast data business that both pictures and texts are excellent such as Word message, program of radio station information, stock information, thereby make audio broadcasting industry obtain the development of taking on a completely new look.
Most important two parts of digital audio broadcasting are the digitizing of frequency modulation (FM) frequency band audio broadcast and the digitizing of amplitude modulation (AM) frequency band audio broadcast.In the U.S., HD Radio(high-definition digital broadcast singal) technology has obtained commercialization, and in Europe, the large standard DAB(Digital AudioBroadcasting of digital Audio Broadcasting two, digital audio broadcasting) and DRM(Digital Radio Mondiale, world's digital broadcasting) promote and come.
In traditional F M frequency range, usable spectrum resource is 87～108Mhz, and this frequency range is further divided into the integral multiple channel of 100Khz, distributes to each broadcasting station.In the U.S., each broadcasting station has been assigned with the frequency spectrum of 400Khz.In China, each broadcasting station has been assigned with 200Khz frequency spectrum.Due to stereo fm signal actual bandwidth at 150Khz with the spectrum intervals gap between interior and broadcasting station, in fact, the availability of frequency spectrum of FM frequency range is not high, has a lot of frequency spectrum cavity-pocket resources further to be utilized.The HD Radio of the U.S. realizes digital audio broadcasting when utilizing the compatible traditional F M of FM frequency spectrum cavity-pocket signal.
Because traditional frequency modulation (FM) signal is positioned at lower frequency range, therefore, FM signal itself has that propagation distance is far away, diffraction and the strong feature of transmittability; Meanwhile, because the digitizing of frequency modulation (FM) frequency band audio broadcast is promoted gradually, therefore, FM signal itself has stronger commercial promise and user base.Therefore, utilize FM signal support navigation to strengthen just to become potential new a, application widely, when how to utilize FM signal to realize navigator fix, guarantee that higher positioning precision has become a technical matters urgently to be resolved hurrily.
Foregoing is only understood the technical solution of the utility model for auxiliary, does not represent and admits that foregoing is prior art.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of differential position system, frequency-modulated broadcast transmitter, navigation signal receiver, when utilizing FM signal to realize navigator fix, guarantees higher positioning precision.
A kind of frequency-modulated broadcast transmitter, this frequency-modulated broadcast transmitter comprises processing unit, and the storage unit being connected with this processing unit, broadcast signal transmission unit, navigation information receiving element and digital signal generation unit, wherein: this cell stores has fm broadcast signal transmitting subsystem; This broadcast signal transmission unit, under the control of this processing unit, externally launches broadcast singal; This navigation information receiving element, under the control of this processing unit, by wire communication link or wireless communication link, receives the first navigation enhancing information from least one navigation reference station; This digital signal generation unit, under the control of this processing unit, generates the second navigation enhancing information in this locality; This processing unit, for call and carry out this fm broadcast signal transmitting subsystem from this storage unit, controls this broadcast signal transmission unit, this navigation information receiving element and this digital signal generation unit.
Preferably, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
A navigation signal receiver, this navigation signal receiver comprises processing unit, the storage unit being connected with this processing unit, broadcast singal receiving element and navigation satellite signal receiving element, wherein: this cell stores has difference positioning subsystem; This broadcast singal receiving element, under the control of this processing unit, receives the broadcast singal that frequency-modulated broadcast transmitter transmitting comes; This navigation satellite signal receiving element, under the control of this processing unit, receives the navigation satellite signal of Navsat transmitting; This processing unit, for call and carry out this difference positioning subsystem from this storage unit, controls this broadcast singal receiving element and navigation satellite signal receiving element.
Preferably, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
Preferably, this navigation signal receiver also comprises: the audio output unit, data display unit and/or the wireless communication unit that are connected with this processing unit, and to export positioning result.
A kind of differential position system, this system comprises at least one navigation reference station, with described navigation reference station by the frequency-modulated broadcast transmitter of wire communication link or wireless communication link communication connection, and at least one navigation signal receiver in described frequency-modulated broadcast transmitter signal cover, wherein: described frequency-modulated broadcast transmitter, for by wire communication link or wireless communication link, receive the first navigation enhancing information of described navigation reference station; Before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging; The digital broadcast signal that described final navigation strengthens information is carried in generation, and in default frequency modulation band transmit, comprises the broadcast singal of described digital broadcast signal; Described navigation signal receiver, for receiving the described broadcast singal of described frequency-modulated broadcast transmitter transmitting, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation; Before receiving described broadcast singal, simultaneously or afterwards, receive navigation satellite signal, and realize difference location according to the navigation satellite signal that the described final navigation obtaining strengthens information and reception, and output positioning result.
Preferably, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
Preferably, described navigation signal receiver is used for: when the digital broadcast signal of the described broadcast singal of launching at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver; When the digital broadcast signal in the described broadcast singal of current frequency-modulated broadcast transmitter transmitting is interfered or signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working; In other frequency-modulated broadcast transmitter set of finding, the corresponding signal of frequency-modulated broadcast transmitter that calculates current navigation signal receiver received power maximum receives frequency and switches to this signal and receives frequency, with the described broadcast singal receiving and the corresponding frequency-modulated broadcast transmitter of this signal reception frequency of demodulation is launched, to obtain new final navigation, strengthen information; Utilize the first navigation satellite signal that navigates enhancing information and reception in the new final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver.
Compare prior art, the utility model carries by one of stack transmitting on the FM frequency range broadcast singal in frequency-modulated broadcast transmitter transmitting the digital broadcast signal that described final navigation strengthens information, guaranteed that traffic rate is far above 1Kbps, when having met navigation enhancing demand, by utilizing the switching of the second navigation enhancing information frequency-modulation broadcasting transmitter that navigation signal receiver comprises based on described final navigation enhancing information, effectively having improved tradition utilizes the first navigation enhancing information to carry out the precision of the method for difference location, significantly improved the sensitivity of navigation signal receiver location, precision and availability.
Accompanying drawing explanation
Fig. 1 is that the system of the utility model differential position system one embodiment forms schematic diagram.
Fig. 2 is the hardware structure diagram of frequency-modulated broadcast transmitter one embodiment in Fig. 1.
Fig. 3 is the functional block diagram that in Fig. 2, fm broadcast signal transmitting subsystem is unified embodiment.
Fig. 4 is the hardware structure diagram of navigation signal receiver one embodiment in Fig. 1.
Fig. 5 is the functional block diagram of difference positioning subsystem one embodiment in Fig. 4.
Fig. 6 is the concrete implementing procedure figure of the utility model difference localization method one embodiment.
Fig. 7 is finally the navigate frame format schematic diagram of enhancing information one embodiment of the utility model.
Fig. 8 is the Spectrum Relationship schematic diagram of traditional FM signal and additional digital broadcast signal one embodiment in the utility model broadcast singal.
Fig. 9 is the mapping relations schematic diagram that shines upon final navigation enhancing information one embodiment shown in Fig. 8 in broadcast singal.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the system for the utility model differential position system one embodiment forms schematic diagram.
This differential position system comprises at least one navigation reference station (take three in Fig. 1 as example), frequency-modulated broadcast transmitter and at least one navigation signal receiver (take three in Fig. 1 as example).Take Fig. 1 as example, A1 is frequency-modulated broadcast transmitter, its coverage is A8, A5, A6 and A7 (for example navigate reference station, described navigation reference station can be GPS(Global Positioning System, GPS) the navigation signal source base station of signal base station, triones navigation system signal base station or other any suitable types), A2, A3 and A4 are navigation signal receivers.
Frequency-modulated broadcast transmitter A1, for by wire communication link or wireless communication link, receives the first navigation enhancing information from least one navigation reference station (A5, A6 and/or A7).For example, described the first navigation enhancing information can comprise that GPS navigation strengthens information, triones navigation system navigation enhancing information (hereinafter to be referred as " Big Dipper navigation enhancing information ") and/or the navigation of other any suitable type navigational system and strengthens information.The type of the first navigation enhancing information is corresponding with the type of navigation reference station, and for example, when described navigation reference station is triones navigation system signal base station, described the first navigation enhancing information at least comprises Big Dipper navigation enhancing information, and therefore not to repeat here.
Frequency-modulated broadcast transmitter A1, also for before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging.
Frame format schematic diagram as shown in Figure 7 is example, and described the first navigation enhancing information comprises Big Dipper navigation enhancing information.It should be noted that, although Big Dipper navigation enhancing information is not also brought in the up-to-date technical standard of the international ocean shipping cause radiotelegraphy council (RTCM), but the similarity due to the technical system of triones navigation system and GPS, Big Dipper navigation enhancing information can be used and the identical data layout of existing RTCM standard completely, therefore, in the frame format schematic diagram shown in Fig. 7, described the first navigation enhancing information also comprises that RTCM navigation enhancing information (it should be noted that, in other embodiment of the present utility model, RTCM navigation enhancing information can be replaced by other any suitable technical standard navigation enhancing information), described the second navigation enhancing information (it should be noted that before the position in described the first navigation enhancing information in the position of frame format, in other embodiment of the present utility model, described the second navigation enhancing information is after the position of frame format can the position in described the first navigation enhancing information), and Big Dipper navigation enhancing information (it should be noted that before the position in RTCM navigation enhancing information in the position of frame format, in other embodiment of the present utility model, Big Dipper navigation enhancing information also can be after RTCM navigates the position of enhancing information in frame format position).
Frame format schematic diagram as shown in Figure 7 is example, and the second navigation enhancing information is the frequency modulation navigation enhancing information that frequency-modulated broadcast transmitter A1 generates.The function of described frequency modulation navigation enhancing information for example comprises:
(1) whole default frequency modulation frequency range is described (for example, 87-108 megahertz (Mega Hertz, MHz)) on, (for example can launch the frequency-modulated broadcast transmitter of the utility model digital broadcast signal p (t) signal, A1) work centre frequency, emissive power, geographic coordinate and working time, for example, so that when the selected transmitting frequency of current navigation signal receiver (, A2, A3 and/or A4) is interfered, be switched to other frequencies with the fastest speed.Accordingly, described frequency modulation navigation enhancing information comprises the frequency-modulated broadcast transmitter of launching digital broadcast signal p (t) signal (for example, work centre frequency, emissive power, geographic coordinate and working time A1).The described working time refers to a frequency-modulated broadcast transmitter shut down this period of time from starting shooting to every day (some frequency-modulated broadcast transmitter is work in 24 hours not).A kind of describing mode of working frequency points is that (for example, 87-108MHz) according to 100Khz interval, being divided into a plurality of (for example, 210) can workable centre frequency by default frequency modulation frequency range.If work centre frequency is Fc Mhz, actual Fc can be divided exactly by 100Khz, and therefore a kind of easy numbering is: by number definition corresponding to Fc, be (Fc-87)/0.1.Emissive power generally be take watt as unit.Geographic coordinate has two kinds of expression modes at least, and a kind of is the geographic coordinate system of latitude, longitude altitude combination representative, and another is the earth's core body-fixed coordinate system that uses (x, y, z) representative;
(2) this frequency-modulated broadcast transmitter current time of (in Fig. 7, name is called " frequency modulation broadcasting transmitting station ") is described, concrete time format can be UTC Universal Time Coordinated and/or triones navigation system time, take Fig. 7 as example, and described frequency modulation navigation enhancing information comprises following territory:
The current time of this frequency modulation broadcasting transmitting station;
The geographic position of this frequency modulation broadcasting transmitting station;
The emissive power of this frequency modulation broadcasting transmitting station;
The switching on and shutting down time of this frequency modulation broadcasting transmitting station;
The geographic position of other known frequency modulation broadcasting transmitting stations;
The emissive power of other known frequency modulation broadcasting transmitting stations;
The switching on and shutting down time of other known frequency modulation broadcasting transmitting stations.
It is emphasized that, Fig. 7 is only an example, to one skilled in the art, with reference to content shown in Fig. 7, can to the above-mentioned some or all of information in described frequency modulation navigation enhancing information, suitably increase, be equal to replacement easily, reach equally the effect of the described frequency modulation navigation enhancing information shown in Fig. 7, at this, do not repeat.
Frequency-modulated broadcast transmitter A1, also carries for generating the digital broadcast signal that described final navigation strengthens information, and in default frequency modulation band transmit, comprises the broadcast singal of described digital broadcast signal.
It should be noted that, for the FM signal receiver with traditional compatible and realize and seamlessly transitting mutually, guarantee that traditional FM signal receiver also can be used to implement the utility model, in a preferred embodiment of the present utility model, described broadcast singal also comprises traditional FM signal, after the navigation signal receiver that most of user uses is realized digitizing, traditional FM signal can be closed, and only in described broadcast singal, retains digital broadcast signal of the present utility model.Described broadcast singal of the present utility model sends to all navigation signal receivers (for example, the A2 in Fig. 1, A3 and A4) in A1 coverage through radio transmission.
As shown in Figure 8, the Spectrum Relationship schematic diagram of traditional FM signal and additional digital broadcast signal one embodiment in the utility model broadcast singal.The baseband signal form that broadcast singal RF of the present utility model (t) is corresponding is f (t)=p (t)+FM (t), and wherein FM (t) is traditional FM signal, and p (t) is digital broadcast signal of the present utility model.Radiofrequency signal bandwidth in the situation that of 100% degree of modulation that FM (t) is corresponding is 150Khz, and the basic available bandwidth of distributing to a FM radio station is generally 200Khz, in order to realize the isolation with adjacent radio station, the shared bandwidth of actual FM radio station is generally 300Khz.Therefore; the maximum bandwidth of p of the present utility model (t) signal is also 300Khz; consider the insulation blocking between adjacent channel; the typical bandwidth of p (t) signal is 260Khz, and the centre frequency of the centre frequency of radiofrequency signal corresponding to p (t) radiofrequency signal corresponding with FM (t) is identical.For FM (t) signal, p (t) is undesired signal, so a matter of utmost importance of this communication system is: will reduce the interference of p (t) to FM (t) on the one hand, make correctly demodulation FM (t) signal of traditional FM receiver, this just requires the power of p (t) as far as possible little; In addition on the one hand, for the new receiver of p (t) design, wish that the power of p (t) is as far as possible high, thereby expansion broadcast distances improves broadcast rate.In CDRadio and HD Radio, p (t) is multi-carrier signal, and p (t) is symmetrical around the 200Khz at carrier wave center with interior part, the part of HD Radio beyond 200Khz is also substantive symmetrical, and CDRadio can be irregular.In CDRadio and HD Radio system, p (t) is mainly used to broadcast figure voice data, also can broadcast general data.P of the present utility model (t) signal, similar with CD Radio and HD Radio on this level.
The typical information form of digital broadcast signal p (t) is multi-carrier OFDM (OFDM), and described final navigation enhancing information is mapped on the subcarrier of different digital broadcast signal p (t).Owing to there being co-channel interference, for improving reception, the method for carrying final navigation enhancing information on digital broadcast signal p of the present utility model (t) is: described final navigation enhancing information is mapped on two subcarriers on center carrier frequencies left side and right side simultaneously.The benefit of doing like this, when the subcarrier of a side is disturbed, the subcarrier of an other side can also be used (for example,, shown in Fig. 9).
Navigation signal receiver (for example, A2, A3 and/or A4), for receiving the described broadcast singal of described frequency-modulated broadcast transmitter A1 transmitting, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation.
Navigation signal receiver of the present utility model (for example, A2, A3 and/or A4) receive after the broadcast singal RF (t) of radio transmission, the digital broadcast signal p (t) resolving in the broadcast singal RF (t) receiving strengthens information to obtain the described final navigation of carrying; When the broadcast singal RF (t) receiving is superimposed while forming by traditional frequency-modulated signals FM (t) and digital broadcast signal p (t), navigation signal receiver of the present utility model (for example, A2, A3 and/or A4) receive after the broadcast singal RF (t) of radio transmission, from the broadcast singal RF (t) receiving, isolate p (t) and FM (t), data message in the p of demodulation separation (t), strengthens information with the described final navigation obtaining wherein.Because the utility model does not need to require separately the concrete signal form of multi-carrier signal, therefore, the p (t) of existing HD Radio and CDRadio and FM (t) separation method are applicable equally in the utility model; General OFDM demodulation method is applicable to the data message in demodulation the utility model p (t).
Navigation signal receiver (for example, A2, A3 and/or A4), also for before receiving described broadcast singal, simultaneously or afterwards, (for example receive navigation satellite signal, the navigation satellite signal of gps satellite signal, triones navigation system satellite-signal or other any suitable types), and realize difference location according to the described final navigation enhancing information obtaining and the navigation satellite signal of reception, and output positioning result.
It should be noted that, the method that navigation signal receiver is realized difference location according to the navigation satellite signal of the described final navigation enhancing information obtaining and reception comprises:
When the p (t) launching at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver;
When the p (t) launching at current frequency-modulated broadcast transmitter is interfered or signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working;
In other frequency-modulated broadcast transmitter set of finding, the corresponding signal of frequency-modulated broadcast transmitter that calculates current navigation signal receiver received power maximum receives frequency and switches to this signal and receives frequency, with p (t) signal receiving and the corresponding frequency-modulated broadcast transmitter of this signal reception frequency of demodulation is launched, to obtain new final navigation, strengthen information;
Utilize the first navigation satellite signal that navigates enhancing information and reception in the new final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver.
It should be noted that, it is similar that navigation signal receiver utilizes the first navigation enhancing information to carry out method and the existing navigation neceiver of difference location, is disclosed method, in a lot of receivers, all realize, and be mature technology, at this, do not repeat.Navigation signal receiver can be by described positioning result (for example, the current location of navigation signal receiver) with the form of voice broadcast, report output (navigation signal receiver now also comprises audio output unit), described positioning result can be shown to (navigation signal receiver now also comprises data display unit) with the form of lteral data or map datum, described positioning result can also be sent to predetermined terminal (navigation signal receiver now also comprises wireless communication unit) by wireless communications environment.
Calculating current navigation signal receiver has multiple with respect to the method for the received power of each frequency-modulated broadcast transmitter in described set, wherein the simplest way is according to wireless free ground propagation formula, and the emissive power that received power equals a frequency-modulated broadcast transmitter is the biquadratic to the distance of current navigation signal receiver divided by this frequency-modulated broadcast transmitter.
Calculate each frequency-modulated broadcast transmitter in described set and divide following two kinds of situations to the method for the distance of current navigation signal receiver:
The first situation: as mentioned before, when the p (t) that current navigation signal receiver is launched at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, orient the current location of navigation signal receiver, in this case, if the p (t) of follow-up this current frequency-modulated broadcast transmitter transmitting is interfered, or when signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working, now, calculating each frequency-modulated broadcast transmitter in described set to the method for the distance of current navigation signal receiver is: use the corresponding geographic coordinate of current location of orienting before current navigation signal receiver, thereby the geographic coordinate that deducts respectively each frequency-modulated broadcast transmitter in described set obtains alternate position spike, and alternate position spike is converted to each frequency-modulated broadcast transmitter to the distance of current navigation signal receiver,
The second situation: current navigation signal receiver finds that once starting shooting the p (t) of current selection frequency-modulated broadcast transmitter transmitting is interfered, or signal strength values is less than predetermined threshold value, in this case, current navigation signal receiver is also also located out without any position data, and the distance that current navigation signal receiver defaults to all frequency-modulated broadcast transmitters in described set all equates.
The differential position system that the utility model provides, by one of stack transmitting on the FM frequency range broadcast singal in frequency-modulated broadcast transmitter transmitting, carry the digital broadcast signal that described final navigation strengthens information, guaranteed that traffic rate is far above 1Kbps, when having met navigation enhancing demand, by utilizing the switching of the second navigation enhancing information frequency-modulation broadcasting transmitter that navigation signal receiver comprises based on described final navigation enhancing information, effectively having improved tradition utilizes the first navigation enhancing information to carry out the precision of the method for difference location, significantly improved the sensitivity of navigation signal receiver location, precision and availability.
As shown in Figure 2, be the hardware structure diagram of one embodiment of frequency-modulated broadcast transmitter in Fig. 1.
This frequency-modulated broadcast transmitter 1 comprises processing unit 10, storage unit 15, broadcast signal transmission unit 13, fm broadcast signal transmitting subsystem 11, navigation information receiving element 17 and digital signal generation unit 18.
This storage unit 15, for storing this fm broadcast signal transmitting subsystem 11 and service data thereof.It is emphasized that this storage unit 15 can be both an independent memory storage, can be also the general designation of a plurality of different memory storages, and therefore not to repeat here.
This broadcast signal transmission unit 13, under the control at this processing unit 10, externally launches broadcast singal.
This navigation information receiving element 17, under the control at this processing unit 10, by wire communication link or wireless communication link, receives for example, the first navigation enhancing information from least one navigation reference station (, the A5 shown in Fig. 1, A6 and/or A7).
This processing unit 10, be used for calling and carry out this fm broadcast signal and launch subsystem 11, to control this navigation information receiving element 17 by wire communication link or wireless communication link, reception for example, from the first navigation enhancing information of at least one reference station that navigates (, the A5 shown in Fig. 1, A6 and/or A7); Before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging; Control described digital signal generation unit 18 and generate and carry described final navigation and strengthen the digital broadcast signal of information, and control described broadcast signal transmission unit 13 and in default frequency modulation band transmit, comprise the broadcast singal of described digital broadcast signal.This processing unit 10 and storage unit 15 can be respectively both independent unit, also can integrate, and formed a controller, and therefore not to repeat here.
As shown in Figure 3, for fm broadcast signal in Fig. 2, launch the functional block diagram of subsystem preferred embodiment.
It is emphasized that, to one skilled in the art, functional block diagram shown in Fig. 3 is only the exemplary plot of a preferred embodiment, and those skilled in the art, around the functional module of this fm broadcast signal transmitting subsystem 11 shown in Fig. 3, can carry out supplementing of new functional module easily; The title of each functional module is self-defined title, only for auxiliary each program function piece of understanding this fm broadcast signal transmitting subsystem 11, be not used in restriction the technical solution of the utility model, the core of technical solutions of the utility model is, the function that the functional module of define name will be reached separately.
This fm broadcast signal transmitting subsystem 11 comprises that navigation strengthens message processing module 110 and fm broadcast signal transmitter module 111.The function of each functional module of this fm broadcast signal transmitting subsystem 11 is as follows:
This navigation strengthens message processing module 110, be used for controlling this navigation information receiving element 17 by wire communication link or wireless communication link, reception for example, from the first navigation enhancing information of at least one reference station that navigates (, the A5 shown in Fig. 1, A6 and/or A7).
This navigation strengthens message processing module 110, also for before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging.
This fm broadcast signal transmitter module 111, for controlling described digital signal generation unit 18, generate and carry described final navigation and strengthen the digital broadcast signal of information, and control described broadcast signal transmission unit 13 and in default frequency modulation band transmit, comprise the broadcast singal of described digital broadcast signal.It should be noted that, for the FM signal receiver with traditional compatible and realize and seamlessly transitting mutually, guarantee that traditional FM signal receiver also can be used to implement the utility model, in a preferred embodiment of the present utility model, described broadcast singal also comprises traditional FM signal, after the navigation signal receiver that most of user uses is realized digitizing, traditional FM signal can be closed, and only in described broadcast singal, retains digital broadcast signal of the present utility model.
As shown in Figure 4, be the hardware structure diagram of navigation signal receiver one embodiment in Fig. 1.
This navigation signal receiver 2 comprises processing unit 20, storage unit 25, broadcast singal receiving element 23, difference positioning subsystem 21 and navigation satellite signal receiving element 27.
This storage unit 25, for storing this difference positioning subsystem 21 and service data thereof.It is emphasized that this storage unit 25 can be both an independent memory storage, can be also the general designation of a plurality of different memory storages, and therefore not to repeat here.
This broadcast singal receiving element 23, under the control at this processing unit 20, receives the broadcast singal that frequency-modulated broadcast transmitter 1 transmitting comes.
This navigation satellite signal receiving element 27, under the control at this processing unit 20, receives the navigation satellite signal of Navsat transmitting.
This processing unit 20, be used for calling and carry out this difference positioning subsystem 21, to control this broadcast singal receiving element 23, receive the described broadcast singal of described frequency-modulated broadcast transmitter A1 transmitting, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation; Before receiving described broadcast singal, simultaneously or afterwards, control this navigation satellite signal receiving element 27 and (for example receive navigation satellite signal, the navigation satellite signal of gps satellite signal, triones navigation system satellite-signal or other any suitable types), and realize difference location according to the described final navigation enhancing information obtaining and the navigation satellite signal of reception, and output positioning result.This processing unit 20 and storage unit 25 can be respectively both independent unit, also can integrate, and formed a controller, and therefore not to repeat here.
As shown in Figure 5, be the functional block diagram of difference positioning subsystem preferred embodiment in Fig. 4.
It is emphasized that, to one skilled in the art, functional block diagram shown in Fig. 5 is only the exemplary plot of a preferred embodiment, and those skilled in the art, around the functional module of this difference positioning subsystem 21 shown in Fig. 5, can carry out supplementing of new functional module easily; The title of each functional module is self-defined title, only for auxiliary each program function piece of understanding this difference positioning subsystem 21, be not used in restriction the technical solution of the utility model, the core of technical solutions of the utility model is, the function that the functional module of define name will be reached separately.
This difference positioning subsystem 21 comprises broadcast singal demodulation module 210 and difference locating module 211.The function of each functional module of this difference positioning subsystem 21 is as follows:
This broadcast singal demodulation module 210, receives for controlling this broadcast singal receiving element 23 the described broadcast singal that described frequency-modulated broadcast transmitter A1 launches, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation.This broadcast singal demodulation module 210 receives after the broadcast singal RF (t) of radio transmission, and the digital broadcast signal p (t) resolving in the broadcast singal RF (t) receiving strengthens information to obtain the described final navigation of carrying; When the broadcast singal RF (t) receiving is superimposed while forming by traditional frequency-modulated signals FM (t) and digital broadcast signal p (t), this broadcast singal demodulation module 210 receives after the broadcast singal RF (t) of radio transmission, from the broadcast singal RF (t) receiving, isolate p (t) and FM (t), data message in the p of demodulation separation (t), strengthens information with the described final navigation obtaining wherein.Because the utility model does not need to require separately the concrete signal form of multi-carrier signal, therefore, the p (t) of existing HD Radio and CDRadio and FM (t) separation method are applicable equally in the utility model; General OFDM demodulation method is applicable to the data message in demodulation the utility model p (t).
This difference locating module 211, for before receiving described broadcast singal, simultaneously or afterwards, control this navigation satellite signal receiving element 27 and (for example receive navigation satellite signal, the navigation satellite signal of gps satellite signal, triones navigation system satellite-signal or other any suitable types), and realize difference location according to the described final navigation enhancing information obtaining and the navigation satellite signal of reception, and output positioning result.
It should be noted that, the method that this difference locating module 211 is realized difference location according to the navigation satellite signal of the described final navigation enhancing information obtaining and reception comprises:
When the p (t) launching at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver;
When the p (t) launching at current frequency-modulated broadcast transmitter is interfered or signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working;
In other frequency-modulated broadcast transmitter set of finding, the corresponding signal of frequency-modulated broadcast transmitter that calculates current navigation signal receiver received power maximum receives frequency and switches to this signal and receives frequency, with p (t) signal receiving and the corresponding frequency-modulated broadcast transmitter of this signal reception frequency of demodulation is launched, and obtain new final navigation enhancing information;
Utilize the first navigation satellite signal that navigates enhancing information and reception in the new final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver.
It should be noted that, it is similar that this difference locating module 211 utilizes the first navigation enhancing information to carry out method and the existing navigation neceiver of difference location, is disclosed method, in a lot of receivers, all realize, and be mature technology, at this, do not repeat.This difference locating module 211 can be by described positioning result (for example, the current location of navigation signal receiver) with the form of voice broadcast, report output (navigation signal receiver now also comprises audio output unit), described positioning result can be shown to (navigation signal receiver now also comprises data display unit) with the form of lteral data or map datum, described positioning result can also be sent to predetermined terminal (navigation signal receiver now also comprises wireless communication unit) by wireless communications environment.
Calculating current navigation signal receiver has multiple with respect to the method for the received power of each frequency-modulated broadcast transmitter in described set, wherein the simplest way is according to wireless free ground propagation formula, and the emissive power that received power equals a frequency-modulated broadcast transmitter is the biquadratic to the distance of current navigation signal receiver divided by this frequency-modulated broadcast transmitter.
Calculate each frequency-modulated broadcast transmitter in described set and divide following two kinds of situations to the method for the distance of current navigation signal receiver:
The first situation: as mentioned before, when the p (t) that current navigation signal receiver is launched at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, orient the current location of navigation signal receiver, in this case, if the p (t) of follow-up this current frequency-modulated broadcast transmitter transmitting is interfered, or when signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working, now, calculating each frequency-modulated broadcast transmitter in described set to the method for the distance of current navigation signal receiver is: use the corresponding geographic coordinate of current location of orienting before current navigation signal receiver, thereby the geographic coordinate that deducts respectively each frequency-modulated broadcast transmitter in described set obtains alternate position spike, and alternate position spike is converted to each frequency-modulated broadcast transmitter to the distance of current navigation signal receiver,
The second situation: current navigation signal receiver finds that once starting shooting the p (t) of current selection frequency-modulated broadcast transmitter transmitting is interfered, or signal strength values is less than predetermined threshold value, in this case, current navigation signal receiver is also also located out without any position data, and the distance that current navigation signal receiver defaults to all frequency-modulated broadcast transmitters in described set all equates.
As shown in Figure 6, be the concrete implementing procedure figure of the utility model difference localization method one embodiment.
Step S10, frequency-modulated broadcast transmitter 1, by wire communication link or wireless communication link, receives the first navigation enhancing information from least one navigation reference station.For example, described the first navigation enhancing information can comprise that GPS navigation strengthens information, triones navigation system navigation enhancing information (hereinafter to be referred as " Big Dipper navigation enhancing information ") and/or the navigation of other any suitable type navigational system and strengthens information.The type of the first navigation enhancing information is corresponding with the type of navigation reference station, and for example, when described navigation reference station is triones navigation system signal base station, described the first navigation enhancing information at least comprises Big Dipper navigation enhancing information, and therefore not to repeat here.
Step S11, frequency-modulated broadcast transmitter 1 before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging.
Step S12, frequency-modulated broadcast transmitter 1 generates and carries the digital broadcast signal that described final navigation strengthens information, and in default frequency modulation band transmit, comprises the broadcast singal of described digital broadcast signal.
Step S13, navigation signal receiver 2 receives the described broadcast singal of described frequency-modulated broadcast transmitter 1 transmitting, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation.
Navigation signal receiver 2 of the present utility model receives after the broadcast singal RF (t) of radio transmission, and the digital broadcast signal p (t) resolving in the broadcast singal RF (t) receiving strengthens information to obtain the described final navigation of carrying; When the broadcast singal RF (t) receiving is superimposed while forming by traditional frequency-modulated signals FM (t) and digital broadcast signal p (t), navigation signal receiver 2 of the present utility model receives after the broadcast singal RF (t) of radio transmission, from the broadcast singal RF (t) receiving, isolate p (t) and FM (t), data message in the p of demodulation separation (t), strengthens information with the described final navigation obtaining wherein.Because the utility model does not need to require separately the concrete signal form of multi-carrier signal, therefore, the p (t) of existing HD Radio and CDRadio and FM (t) separation method are applicable equally in the utility model; General OFDM demodulation method is applicable to the data message in demodulation the utility model p (t).
Step S15, navigation signal receiver 2 before receiving described broadcast singal, simultaneously or afterwards, (for example receive navigation satellite signal, the navigation satellite signal of gps satellite signal, triones navigation system satellite-signal or other any suitable types), and realize difference location according to the described final navigation enhancing information obtaining and the navigation satellite signal of reception, and output positioning result.
It should be noted that, the method that navigation signal receiver 2 is realized difference location according to the navigation satellite signal of the described final navigation enhancing information obtaining and reception comprises:
When the p (t) launching at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver;
When the p (t) launching at current frequency-modulated broadcast transmitter is interfered or signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working;
In other frequency-modulated broadcast transmitter set of finding, the corresponding signal of frequency-modulated broadcast transmitter that calculates current navigation signal receiver received power maximum receives frequency and switches to this signal and receives frequency, with p (t) signal receiving and the corresponding frequency-modulated broadcast transmitter of this signal reception frequency of demodulation is launched, to obtain new final navigation, strengthen information;
Utilize the first navigation satellite signal that navigates enhancing information and reception in the new final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver.
It should be noted that, it is similar that navigation signal receiver 2 utilizes the first navigation enhancing information to carry out method and the existing navigation neceiver of difference location, is disclosed method, in a lot of receivers, all realize, and be mature technology, at this, do not repeat.Navigation signal receiver 2 can be by described positioning result (for example, the current location of navigation signal receiver) with the form of voice broadcast, report output (navigation signal receiver 2 now also comprises audio output unit), described positioning result can be shown to (navigation signal receiver 2 now also comprises data display unit) with the form of lteral data or map datum, described positioning result can also be sent to predetermined terminal (navigation signal receiver 2 now also comprises wireless communication unit) by wireless communications environment.
Calculating current navigation signal receiver has multiple with respect to the method for the received power of each frequency-modulated broadcast transmitter in described set, wherein the simplest way is according to wireless free ground propagation formula, and the emissive power that received power equals a frequency-modulated broadcast transmitter is the biquadratic to the distance of current navigation signal receiver divided by this frequency-modulated broadcast transmitter.
Calculate each frequency-modulated broadcast transmitter in described set and divide following two kinds of situations to the method for the distance of current navigation signal receiver:
The first situation: as mentioned before, when the p (t) that current navigation signal receiver is launched at current frequency-modulated broadcast transmitter is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, orient the current location of navigation signal receiver, in this case, if the p (t) of follow-up this current frequency-modulated broadcast transmitter transmitting is interfered, or when signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working, now, calculating each frequency-modulated broadcast transmitter in described set to the method for the distance of current navigation signal receiver is: use the corresponding geographic coordinate of current location of orienting before current navigation signal receiver, thereby the geographic coordinate that deducts respectively each frequency-modulated broadcast transmitter in described set obtains alternate position spike, and alternate position spike is converted to each frequency-modulated broadcast transmitter to the distance of current navigation signal receiver,
The second situation: current navigation signal receiver finds that once starting shooting the p (t) of current selection frequency-modulated broadcast transmitter transmitting is interfered, or signal strength values is less than predetermined threshold value, in this case, current navigation signal receiver is also also located out without any position data, and the distance that current navigation signal receiver defaults to all frequency-modulated broadcast transmitters in described set all equates.
The difference localization method that the utility model provides, by one of stack transmitting on the FM frequency range broadcast singal in frequency-modulated broadcast transmitter 1 transmitting, carry the digital broadcast signal that described final navigation strengthens information, guaranteed that traffic rate is far above 1Kbps, when having met navigation enhancing demand, by utilizing the switching of the second navigation enhancing information frequency-modulation broadcasting transmitter 1 that navigation signal receiver 2 comprises based on described final navigation enhancing information, effectively having improved tradition utilizes the first navigation enhancing information to carry out the precision of the method for difference location, significantly improved the sensitivity of navigation signal receiver location, precision and availability.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (8)
1. a frequency-modulated broadcast transmitter, is characterized in that, this frequency-modulated broadcast transmitter comprises processing unit, and the storage unit being connected with this processing unit, broadcast signal transmission unit, navigation information receiving element and digital signal generation unit, wherein:
This broadcast signal transmission unit, under the control of this processing unit, externally launches broadcast singal;
This navigation information receiving element, under the control of this processing unit, by wire communication link or wireless communication link, receives the first navigation enhancing information from least one navigation reference station;
This digital signal generation unit, under the control of this processing unit, generates the second navigation enhancing information in this locality;
This processing unit, for controlling this broadcast signal transmission unit, this navigation information receiving element and this digital signal generation unit.
2. frequency-modulated broadcast transmitter as claimed in claim 1, is characterized in that, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
3. a navigation signal receiver, is characterized in that, this navigation signal receiver comprises processing unit, the storage unit being connected with this processing unit, broadcast singal receiving element and navigation satellite signal receiving element, wherein:
This broadcast singal receiving element, under the control of this processing unit, receives the broadcast singal that frequency-modulated broadcast transmitter transmitting comes;
This navigation satellite signal receiving element, under the control of this processing unit, receives the navigation satellite signal of Navsat transmitting;
This processing unit, for controlling this broadcast singal receiving element and navigation satellite signal receiving element.
4. navigation signal receiver as claimed in claim 3, is characterized in that, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
5. the navigation signal receiver as described in claim 3 or 4, is characterized in that, this navigation signal receiver also comprises:
The audio output unit, data display unit and/or the wireless communication unit that are connected with this processing unit, to export positioning result.
6. a differential position system, it is characterized in that, this system comprises at least one navigation reference station, with described navigation reference station by the frequency-modulated broadcast transmitter of wire communication link or wireless communication link communication connection, and at least one the navigation signal receiver in described frequency-modulated broadcast transmitter signal cover, wherein:
Described frequency-modulated broadcast transmitter, for by wire communication link or wireless communication link, receives the first navigation enhancing information of described navigation reference station; Before receiving described the first navigation enhancing information, simultaneously or afterwards, in this locality, generate the second navigation enhancing information, and after receiving described the first navigation enhancing information and generating described the second navigation enhancing information, described the first navigation enhancing information is become to final navigation enhancing information with described the second navigation enhancing information merging; The digital broadcast signal that described final navigation strengthens information is carried in generation, and in default frequency modulation band transmit, comprises the broadcast singal of described digital broadcast signal;
Described navigation signal receiver, for receiving the described broadcast singal of described frequency-modulated broadcast transmitter transmitting, and the described broadcast singal that demodulation receives strengthens information to obtain described final navigation; Before receiving described broadcast singal, simultaneously or afterwards, receive navigation satellite signal, and realize difference location according to the navigation satellite signal that the described final navigation obtaining strengthens information and reception, and output positioning result.
7. differential position system as claimed in claim 6, is characterized in that, described broadcast singal consists of traditional FM signal and the stack of described digital broadcast signal.
8. the differential position system as described in claim 6 or 7, is characterized in that, described navigation signal receiver is used for:
When the digital broadcast signal in the described broadcast singal of current frequency-modulated broadcast transmitter transmitting is not interfered or signal strength values is more than or equal to predetermined threshold value, utilize the first navigation satellite signal that navigates enhancing information and reception in the described final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver;
When the digital broadcast signal in the described broadcast singal of current frequency-modulated broadcast transmitter transmitting is interfered or signal strength values is less than predetermined threshold value, according to the entrained frequency modulation navigation of the second navigation enhancing information enhancing information in the described final navigation enhancing information obtaining, find the set of current other frequency-modulated broadcast transmitters of working;
In other frequency-modulated broadcast transmitter set of finding, the corresponding signal of frequency-modulated broadcast transmitter that calculates current navigation signal receiver received power maximum receives frequency and switches to this signal and receives frequency, with the described broadcast singal receiving and the corresponding frequency-modulated broadcast transmitter of this signal reception frequency of demodulation is launched, to obtain new final navigation, strengthen information;
Utilize the first navigation satellite signal that navigates enhancing information and reception in the new final navigation enhancing information obtaining to realize difference location, to orient the current location of navigation signal receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420173665.8U CN204009079U (en) | 2014-04-10 | 2014-04-10 | Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420173665.8U CN204009079U (en) | 2014-04-10 | 2014-04-10 | Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204009079U true CN204009079U (en) | 2014-12-10 |
Family
ID=52049057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420173665.8U Expired - Lifetime CN204009079U (en) | 2014-04-10 | 2014-04-10 | Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204009079U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911186A (en) * | 2017-10-23 | 2018-04-13 | 武汉熙瑞祥云信息科技有限公司 | CORS Radio Data Systems and method |
| WO2020051937A1 (en) * | 2018-09-13 | 2020-03-19 | 深圳思凯微电子有限公司 | Data transmission method and device and data receiving method and device |
| CN113945956A (en) * | 2021-10-15 | 2022-01-18 | 北京路凯智行科技有限公司 | Vehicle-mounted positioning system and mining vehicle comprising same |
-
2014
- 2014-04-10 CN CN201420173665.8U patent/CN204009079U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911186A (en) * | 2017-10-23 | 2018-04-13 | 武汉熙瑞祥云信息科技有限公司 | CORS Radio Data Systems and method |
| CN107911186B (en) * | 2017-10-23 | 2024-03-26 | 武汉熙瑞祥云信息科技有限公司 | CORS data broadcasting system and method |
| WO2020051937A1 (en) * | 2018-09-13 | 2020-03-19 | 深圳思凯微电子有限公司 | Data transmission method and device and data receiving method and device |
| CN113945956A (en) * | 2021-10-15 | 2022-01-18 | 北京路凯智行科技有限公司 | Vehicle-mounted positioning system and mining vehicle comprising same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103983995A (en) | Differential positioning method and system, frequency-modulated broadcast transmitter and navigation signal receiver | |
| CN101977172B (en) | Broadcast positioning signal generation method, positioning method and device | |
| CN106656307B (en) | Unmanned aerial vehicle flight limitation management method based on frequency modulation data broadcasting, unmanned aerial vehicle and management center | |
| CN103364758A (en) | Navigational positioning method and navigational positioning system | |
| Chen et al. | Super-resolution time of arrival estimation for a symbiotic FM radio data system | |
| CN102307168B (en) | Separation method and receiving device of digital broadcasting analog-to-digital (A/D) signal at frequency modulation (FM) broadcast band | |
| CN204009079U (en) | Differential position system, frequency-modulated broadcast transmitter, navigation signal receiver | |
| CN103630915B (en) | A method of carrying out navigator fix using digital frequency modulation broadcast | |
| CN114257956A (en) | MIMO pseudo satellite system base station device | |
| CN102724156A (en) | Generation method as well as positioning method and device of time-division code-division orthogonal frequency division multiplexed signals | |
| CN101977293A (en) | Method for estimating time delay of ground broadcast signals of digital television | |
| EP1729473B1 (en) | Single frequency network optimization by phase and amplitude offset | |
| CN101162953A (en) | Frequency modulated sub-carrier traffic information issuing system | |
| CN103095620B (en) | Sending, receiving method and the device of frequency modulation frequency band digital broadcast singal | |
| CN100377581C (en) | Digital broadcast receiver capable of converting radio-wave mode output | |
| CN103869335A (en) | Generation method for complex carrier navigation signal | |
| US20230422028A1 (en) | Internet Of Things Transmission And Reception System | |
| CN106301455A (en) | A kind of multiple-frequency signal generates method and system | |
| CN108955623A (en) | A kind of building deformation monitoring method, system and ground base navigation beacon using broadcasting and TV data broadcasting | |
| Chen et al. | GNSS augmentation by FM radio symbiosis | |
| CN102832965A (en) | Pseudorange acquisition and positioning method, device and system based on broadcast positioning signal | |
| CN103439705B (en) | Based on the range measurement system of the discontinuous nonperiodic signal of GMSK modulation | |
| CN113765837B (en) | Modulation method, system, equipment and storage medium for narrow-band data broadcast | |
| CN110809241A (en) | Radio broadcasting and network broadcasting intelligent switching system | |
| WO2016045314A1 (en) | Signal transmission method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150928 Address after: 518000 design & Application Industrial Park, Shenzhen, Nanshan District, Shenzhen, 1089, Guang Guang road, Guangdong, 508 Patentee after: SHENZHEN SKYCASTER MICRONICS Inc. Address before: 518000 design & Application Industrial Park, Shenzhen, Nanshan District, Shenzhen, 1089, Guang Guang road, Guangdong, 508 Patentee before: SHENZHEN SKYCASTER MICRONICS Inc. Patentee before: Guilin CEKE Communication Equipment Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 Shenzhen integrated circuit design and application Industrial Park, No. 1089 Tea Light Road, Shenzhen, Guangdong 508-1, Nanshan District, China Patentee after: SHENZHEN SKYCASTER MICRONICS Inc. Address before: 518000 design & Application Industrial Park, Shenzhen, Nanshan District, Shenzhen, 1089, Guang Guang road, Guangdong, 508 Patentee before: SHENZHEN SKYCASTER MICRONICS Inc. |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Guanghua Inventor after: Men Aidong Inventor before: Chen Xi Inventor before: Zhang Guanghua Inventor before: Men Aidong |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |