CN1184748C - Radio communication, ranging and region positioning system - Google Patents
Radio communication, ranging and region positioning system Download PDFInfo
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- CN1184748C CN1184748C CNB001228056A CN00122805A CN1184748C CN 1184748 C CN1184748 C CN 1184748C CN B001228056 A CNB001228056 A CN B001228056A CN 00122805 A CN00122805 A CN 00122805A CN 1184748 C CN1184748 C CN 1184748C
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Abstract
The present invention relates to a radio communication, ranging and region positioning system which belongs to the technical field of radio communication. One or a plurality of low frequency sinusoidal signals are additionally added on the basis of an original communication system and are taken as positioning signals. The positioning signals and the original communication signals modulate and emit high frequency carriers, and a receiver demodulates the composite signals. The phase changes of the positioning signals are proportional to the transmitted distance of electric waves so that ranging and positioning can be carried out. The present invention can range during communication and realize region positioning by the cooperation of a base station. The present invention has the advantages of wide accommodation, high precision, low cost and easy realization, and can be widely used in military and civil communication, and ranging and positioning operation.
Description
The present invention relates to a kind of radio communication, ranging system, belong to the radio communication technology field.
Present used telecommunication equipment, as intercom, mobile phone, car phone etc., do not possess range finding or positioning function, present widely used navigation system is GPS, it adopts some position location satellite emission framing signals, subscriber equipment receives the radio wave of satellites transmits, and determines distance according to the transmission time, and then calculates the position.Because gps system must adopt 24 satellites and high precision clock, the development cost costliness has only the U.S. to have this system, and general user's certainty of measurement is about 100 meters.
The purpose of this invention is to provide a kind of radio communication, ranging system, it can realize range finding in communication process, under the cooperation of fixed base stations, realizes zone location.Communication comprises following three aspects with the implication of location association system: function expansion, and can communicate by letter and can locate, satisfy multi-functional user's demand; Effective utilization of existing frequency resource, existing hardware environment.For example, the hardware and software of broadcasting, TV, mobile communication through exploitation, also can be used for the location needs; The function infiltration when the known users position, can realize power control, or utilize smart antenna to improve communication quality.
Among the present invention,, set one or a few low frequency sinusoidal signal as framing signal for finding range and locating.Framing signal constitutes compound baseband signal with original signal of communication.This baseband signal is modulated high frequency carrier, then emission.Mobile subscriber's receiver is received this composite signal and is finished demodulation.The phase change of framing signal is directly proportional with the distance of radio wave propagation after the demodulation, can finish range finding and location by the measurement of framing signal phase change thus.The modulation that this method adopts system, the mode of demodulation can be amplitude modulation, frequency modulation or various coding system without limits.This method is also unrestricted to traffic category, can be analog signal communication or digital signal communication.
Communication and ranging system comprise two above subscriber computers, each subscriber computer comprises the CF signal generator, telephone transmitter, positioning signal generator, modulator, circulator, antenna, receiver and the receiver that is connected receiver, the signal of telephone transmitter and CF signal generator is input to modulator and modulates, circulator receives the signal of modulator and antenna and is sent to antenna and receiver respectively, it is characterized in that: the present invention also comprises positioning signal generator, phase discriminator and commutator, commutator is connected between receiver and the modulator and links to each other with phase discriminator with positioning signal generator, a kind of state of commutator is that receiver and modulator directly join, and makes modulator can accept the location contrast signal of receiver output; Another state is that the location contrast signal of receiver output adds to phase discriminator, and the positioning reference signal of locating the generator generation this moment also adds to modulator when adding to phase discriminator.
The CF signal generator of subscriber computer and positioning signal generator are made up of a frequency maker jointly, in order when enlarging measuring distance, to make certainty of measurement unaffected, the positioning reference signal of the positioning signal generator of each subscriber computer frequency maker generation just is made up of two close sinusoidal signals of frequency, modulator was by first fen modulator, modulator was formed with the power synthesis circuit that receives these two branch modulator output signals in second minute, two branch modulators all receive CF signal the generator just signal that produces of frequency maker and two positioning reference signals that receive positioning signal generator respectively, wherein second fen modulator also receives voice signal, after synthesizing, the modulated signal that power synthesis circuit is exported two branch modulators sends into circulator, through the antenna emission, by the receiver reception of another subscriber computer; For communication between two users, the receiver section of subscriber computer can comprise a high-frequency amplifier, it receives from the signal of antenna through circulator, the output signal of high-frequency amplifier and the signal of local oscillator add to frequency mixer together, the signal of its output is the difference frequency component of CF signal and local oscillation signal, and is added to a demodulator after an intermediate frequency amplifier amplifies.Baseband signal before demodulator will be modulated restores, and is added to respectively on first filter, second band pass filter and the 3rd band pass filter, and first band pass filter leaches voice signal, delivers to loud speaker or earphone after the amplification.The low frequency output signal of second band pass filter and another low frequency local oscillator are added to other first low-converter, the output of this low-converter all is added to second low-converter respectively behind two low frequency bandpass filters, after the output of this low-converter through centre frequency is the band pass filter of difference of two sinusoidal framing signal frequencies then, export the equal low frequency signal of difference of a frequency and two sinusoidal framing signal frequencies, be used for coarse range measuring, the 3rd band pass filter leaches in the close sinusoidal framing signal of two frequencies, is used for fine range measurement.
Communicate by letter in the time of for the multi-user and the location, be made of the CF signal generator and the positioning signal generator of subscriber computer equally a frequency maker, the frequency maker produces two sinusoidal signals that frequency is close, constitutes the positioning reference signal.The receiver of subscriber computer also comprises a wideband low noise high-frequency amplifier, linear frequency sweep generator and A/D converter, the linear frequency sweep generator is controlled by a digital processor, this digital processor also is a phase discriminator simultaneously, high-frequency amplifier receives the signal that arrives through circulator from antenna, the signal that the output signal of high-frequency amplifier and linear frequency sweep generator produce enters a low-converter, its output is after an intermediate frequency amplification and a demodulator demodulation, the close positioning reference signal of two frequencies that produces with the frequency maker enters the A/D converter, enter the processing that digital processor comprises phase demodulation after becoming digital signal, thereby distance is calculated.
Radio areas navigation system of the present invention, it comprises the radio station and the subscriber computer of four above fixed positions.Area positioning system has two kinds of different composing methods:
User oneself location: have one to be the main station in four fixed stations of system, other is the attached station.The main station has a positioning signal generator, and its output signal is transmitted to an attached station and user with the CF signal of the main station.Each attached station all has a receiver that can calculate main website framing signal frequency, receiver calculates the framing signal frequency and eliminates because of after the constant phase difference that fixed range causes between main website and this attached station, carrier frequency with each attached station is launched, thereby subscriber computer can be received the framing signal of each station, measure the range difference of user, and further calculate the position of oneself to each station.
Determine user's position by at least four fixed stations or base station: adopt " dual user range finding " principle, measure the distance of each base station to the user, but, therefore can remove the appropriate section of subscriber computer Measurement Phase as long as their distances to the user are measured in each base station.
The present invention has that wide accommodation, precision height, cost are low, the advantage of easy realization, can be used in dual-use communication, range finding and the location.
Below in conjunction with accompanying drawing the present invention is further described.
The base-band signal spectrum structure chart that Fig. 1 uses for communication, navigation system;
Fig. 2 is two-way communication between two users, range measurement principle figure;
Transmitter module figure when Fig. 3 is big distance ranging;
Fig. 4 is the some frequency receiver module map of two-way communication between two users, range finding;
Fig. 5 is the some frequency receiver module map of two fixed stations range finding;
Fig. 6 is the panoramic receiver module map of multi-user communication location;
Fig. 7 is the schematic diagram of the implementation 1 of area positioning system (APS);
Fig. 8 is the schematic diagram of the implementation 2 of area positioning system (APS).
The present invention is divided into fundamental system and area positioning system (Area Position System is called for short APS), and fundamental system can realize between any two users or communication between the multi-user and Determination of distance; Area positioning system utilizes the fixed radio station of known geographic coordinate on four (or more) ground, determines user's position thus.
When the communication among the present invention was voice communication, the base-band signal spectrum structure that communication, navigation system are used as shown in Figure 1.Wherein, 20Hz～20KHz is the required frequency spectrum of voice communication, and locating required frequency spectrum is one or two low frequency spectral lines.The position arrangement of location spectral line is between 20KHz～200KHz.
Realize that the fundamental system block diagram that distance is measured between two-way communication and two users between any two users sees Fig. 2.02 is user A among the figure, and 01 is user B.01 is identical with 02 composition.
205 equal ω for frequency
01The CF signal generator.210 equal Ω (Ω=2 π F for frequency
Ω) positioning signal generator, the signal of its generation is cos Ω t.F
ΩBe a low frequency signal, as F
Ω=150KHz.204 is that (for the amplitude modulation system, modulator is a multiplier to modulator; For the frequency modulation system, modulator is a frequency modulator; For the coding system, the modulator here is an encoder etc.), when adopting the amplitude modulation system, the mathematic(al) representation of effective framing signal of modulator 204 outputs is cos (ω
01± Ω) t.203 is circulator, and 204 signal is delivered to antenna 202 and launched behind circulator.
If two users' distance is D.Effective framing signal that the antenna 102 of user B is received is,
cos(ω
01±Ω)(t+Δt)， Δt＝D/c
The c light velocity in the formula.This signal enters receiver module 106 through circulator 103.Receiver calculates cos (Ω t+ Ω Δ t).105 is the CF signal generator of user B, and operating frequency is ω
02104 is modulator.The signal cos (Ω t+ Ω Δ t) of receiver output is added to 104 modulators, and 104 are output as cos (ω
02± Ω) (t+ Δ t).This signal sends to user A through circulator 103, antenna 102.
The signal that the antenna 202 of user A is received is cos (ω
02± Ω) (t+2 Δ t).This signal is delivered to receiver module 206,206 through circulator 203 and is calculated signal cos (Ω t+2 Ω Δ t).Above-mentioned signal and 210 signal cos Ω t relatively and measure phase difference φ=2 Ω Δ t by phase discriminator 209 (or 109).So the distance between user A, B equals
As Δ φ during from 0～2 π, D is from 0～λ.F for example
Ω=150KHz, λ=1KM; As F
Ω=1KHz, λ=150KM.
When user A finds range, the commutator K of Unit 02
ABe connected the commutator K of Unit 01 with the 2-2 point
BBe connected with the 1-1 point.When user B finds range, the commutator K of Unit 02
ABe connected the commutator K of Unit 01 with the 1-1 point
BBe connected with the 2-2 point.In fact, two commutators can be electronic switches, and change according to certain frequency, make two users advance to finish range finding simultaneously by time-sharing approach.
For not influencing communication, wish F
Ω＞20KHz.For example get F
Ω=150KHz, maximum range D
0=1KM.If the precision of Measurement Phase is 0.5 degree, relative accuracy is 1/720=1.4 * 10
-3Concerning 1KM, precision is 1.4 meters.
To big communication distance, can adopt following measure: the location frequency spectrum during order transmits is two:
cosω
11t (1)
cosω
12t (2)
See Fig. 1.Frequency spectrum ω
11With frequency spectrum ω
12Mixing is got difference frequency and is got cos (ω
12-ω
11) t.Obviously, if F
11=150KHz, F
12=151KHz after treatment, can make F
ΩThe numerical value that two equivalences are arranged: one is 150KHz; Another is 1KHz.So, available F
Ω=1KHz carries out coarse range measuring in 150 kilometer range, use F
Ω=150KHz carries out accurate measurement in 1 kilometer, make the absolute measurement precision in whole 150 kilometer range reach 1.4 meters, and relative accuracy reaches 1 * 10
-5
In order to realize above-mentioned requirements, the transmitter module composition is seen Fig. 3.301 is frequency synthesizer, and it produces four frequency signals: transmitter carrier frequency frequencies omega
0Framing signal ω
11, ω
12And ω
12-ω
11305 is audio frequency amplifier, to the signal amplification of voice communication.302 is second fen modulator M
2, 303 is first fen modulator M
1, they can be amplitude modulaors, also frequency modulator or encoder etc.The CF signal ω that the frequency maker produces
0Be added to branch modulator M simultaneously
1And M
2Framing signal ω
11Be added to first fen modulator M
1, carrier signal is modulated.Framing signal ω
12Be added to second fen modulator M with voice signal
2, carrier signal is modulated.304 is power combiner, will divide modulator M
1And M
2The modulated signal of output synthesizes, and forms the desired spectrum structure of Fig. 1.
For communication between two users and range finding, receiver module adopts some system frequently.In the some frequency system, the receiver module composition is seen Fig. 4.401 is low-noise high-frequency amplifier, and the signal that receives is put in advance.404 is first local oscillator, and the generation frequency is F
L1, F
L1=F
L1=F
0+ F
IFF
0Be carrier frequency frequency, F
IFBe IF-FRE, as 465KHz.
402 is frequency mixer, and it is output as the difference frequency component of signal and local oscillator.403 is intermediate frequency amplifier.405 is demodulator, depends on the communication system difference, can be the wave detector of amplitude-modulated signal, the frequency discriminator or the decoder of FM signal.The frequency spectrum of 405 outputs is exactly the spectrum of Fig. 1.First band pass filter (being called for short B.P.F.) 406 leaches voice signal, is connected with earphone after 409 amplifications, finishes voice communication tasks.
Second band pass filter 407 leaches ω
11The 3rd band pass filter 408 leaches two location frequency spectrum: ω
12And ω
11411 is second local oscillator, and output frequency is F
L2, F
L2=F
11+ 5 (unit is KHz).410 is low-converter.The centre frequency of band pass filter 412 is 5KHz.The centre frequency of filter 413 is 5-|F
12-F
11| (unit is KHz).414 is low-converter.The centre frequency of band pass filter 415 be (| F
12-F
11|).ω
11And ω
12-ω
11Enter phase measuring circuit, and finish the range finding task through phase measurement.
The range difference of measuring two fixed stations is the key technology of area positioning system.The point frequency receiver module that this application is required is seen Fig. 5.503 is frequency synthesizer.Carrier frequency frequency F according to pre-determined two fixed stations
01And F
02, frequency synthesizer produces local oscillation frequency F
L1=F
01+ F
1F, F
L2=F
02+ F
IF, F
L3=F
11+ 5KHz.
501,506 and 512 is No. one receiver.513,517 and 523 is another road receiver.The formation of this two-way receiver does not have different with the formation of Fig. 4 receiver.
524 is digital processor, and its major function is: carry out phase measurement (bigness scale) and to the phase measurement (accurate measurement) between the signal of 506 and 517 outputs, measure the range difference of receiver to two fixed station thus by the signal to 512 and 523 outputs; Receiver is managed, as predetermined F
0iWith adjustment F
LiDeng.
The panoramic receiver system is used for N communication and location (N＞2) between the user.The user can communicate with a plurality of targets simultaneously, and measure and each target between distance, range difference or the like.In the scanning system, the receiver module composition is seen Fig. 6.
604 is the linear frequency sweep generator, and its output frequency is linear growth in time.601 is the wideband low noise high-frequency amplifier.602 is low-converter, and 603 is intermediate frequency amplifier.605 is demodulator.608 is analog-to-digital converter (A/D converter), and 609 is digital signal processor.For realizing phase measurement, with ω
11And ω
12Receive the A/D converter that has the phase discriminator effect simultaneously simultaneously.
Area positioning system (APS) is formed: the user receives the framing signal of four fixed station stations (their geographical coordinate is known) emission, carries out phase measurement, just can determine the geographical coordinate (comprising position and height) of oneself.Around this principle the block diagram of the area positioning system of Gou Chenging (APS) is seen Fig. 7.
Among Fig. 7, A, B, C, D are the fixed station of four known geographic coordinates, and main website is A.705 and 706 for carrier frequency be ω
ATransmitter.703 is positioning signal generator, and its frequency is that Ω (comprises ω
11And ω
12).The signal of A station emission sends attached station B, C, D... and user simultaneously to.B, C, D... calculate Ω and (comprise ω after receiving the signal at A station
11And ω
12), and the constant phase that transmission range causes between the modifying factor fixed station moves, and uses different separately carrier frequency ω then
B, ω
C, ω
D... launch.
The geographical coordinate of the emission station is respectively the phase center of antenna 701,707,711 and 715.
719 is receiver P
1, it can receive the signal of two stations (as A and B) in four stations at least the while (or order), and calculates phase difference (the range difference D of these two stations (A and B)
a-D
h).Measure AC then, the range difference between CD.Calculate position and the height of receiver P1 thus.720 is receiver P
2, 722 is receiver P
N, their all available geographical coordinates of determining oneself with quadrat method.If P
1, P
2... P
NBehind definite coordinate separately, the A of main website is given in timed sending Deng the user, and the A of main website is forwarded to all users again, so any one user not only can know the position of oneself, can also know the positional information of other target in this zone.Among Xu Shu the APS, oneself finishes range finding the user in the above, also the range finding result can be passed to the base station.In this working method, the user does not need to transmit fully, is the framing signal of passive reception base station.
Another kind of area positioning system (APS) is the position by the base station measurement user, also can tell the user with measurement result, but the user must receive signal of base station and launch an inverse signal.The principle with " dual user range finding " shown in Figure 2 is identical basically to determine the principle of customer location by the base station, as long as but finish each base station to user's range finding.Therefore, can remove the related circuit part of Measurement Phase in the subscriber computer.Determine that by the base station block diagram of customer location system sees Fig. 8.Wherein the A station produces a location spectral line Ω (for solving the contradiction of range and precision, also can adopt two location spectral lines), through modulator M
ABe transmitted to the user.The user calculates Ω through demodulator, returns base station A then after the modulators modulate of receiver.After the signal demodulation of base station receiver with the user, obtain the signal that frequency is Ω.Measure Δ φ by phase discriminator
A, can measure the distance of base station A to the user.B station among Fig. 8, C station and D station use the same method and measure Δ φ
B, Δ φ
CWith Δ φ
D, promptly measure the distance of each base station, and further determine user's position and height to the user.This method need not to utilize GPS, and certainty of measurement can be in several meters.
Claims (3)
1. radio communication, ranging system, it comprises two above subscriber computers, each subscriber computer comprises the CF signal generator, telephone transmitter, positioning signal generator, modulator, circulator, antenna, receiver and the receiver that is connected receiver, the signal of telephone transmitter and CF signal generator is input to modulator and modulates, circulator receives the signal of modulator and antenna and is sent to antenna and receiver respectively, it is characterized in that: native system also comprises phase discriminator and commutator, commutator is connected between receiver and the modulator and links to each other with phase discriminator with positioning signal generator, a kind of state of commutator is that receiver and modulator directly join, and makes modulator can accept the location contrast signal of receiver output; Another state is that the location contrast signal of receiver output adds to phase discriminator, and the positioning reference signal of locating the generator generation this moment also adds to modulator when adding to phase discriminator.
2. radio communication according to claim 1, ranging system, the CF signal generator and the positioning signal generator that it is characterized in that subscriber computer are made up of a frequency maker, the positioning reference signal of positioning signal generator frequency maker generation just is made of two close sinusoidal signals of frequency, modulator was by first fen modulator, modulator was formed with the power synthesis circuit that receives these two branch modulator output signals in second minute, two branch modulators all receive CF signal the generator just signal that produces of frequency maker and two positioning reference signals that receive positioning signal generator respectively, wherein second fen modulator also receives voice signal, after synthesizing, the modulated signal that power synthesis circuit is exported two branch modulators sends into circulator, through the antenna emission, by the receiver reception of another subscriber computer; For communication between two users, the receiver of subscriber computer can comprise a high-frequency amplifier, it receives from the signal of antenna through circulator, the output signal of high-frequency amplifier and the signal of local oscillator add to frequency mixer together, the signal of its output is the difference frequency component of CF signal and local oscillation signal and is added to a demodulator after an intermediate frequency amplifier amplifies, baseband signal before demodulator will be modulated restores, and be added to first band pass filter respectively, on second band pass filter and the 3rd band pass filter, first band pass filter leaches voice signal, delivers to loud speaker or earphone after the amplification; The low frequency output signal of second band pass filter and another low frequency local oscillator are added to first low-converter, the output of this low-converter all is added to second low-converter respectively behind two low frequency bandpass filters, after the output of this low-converter through centre frequency is the band pass filter of difference of two sinusoidal framing signal frequencies then, export the equal low frequency signal of difference of a frequency and two sinusoidal framing signal frequencies, be used for coarse range measuring, the 3rd band pass filter leaches in the close sinusoidal framing signal of two frequencies, is used for fine range measurement.
3. radio communication according to claim 1, ranging system, the receiver that it is characterized in that subscriber computer also comprises a wideband low noise high-frequency amplifier, linear frequency sweep generator and A/D converter, the CF signal generator of subscriber computer and positioning signal generator are made up of a frequency maker, the frequency maker produces two sinusoidal signals that frequency is close, constitute the positioning reference signal, the linear frequency sweep generator is controlled by a digital processor, this digital processor also is a phase discriminator simultaneously, high-frequency amplifier receives the signal that arrives through circulator from antenna, the signal that the output signal of high-frequency amplifier and linear frequency sweep generator produce enters a low-converter, its output is after an intermediate frequency amplification and a demodulator demodulation, two positioning reference signals that produce with the frequency maker enter the A/D converter, become and enter digital processor after the digital signal and handle, thereby distance is calculated.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001228056A CN1184748C (en) | 2000-08-25 | 2000-08-25 | Radio communication, ranging and region positioning system |
| PCT/US2001/022246 WO2002006766A1 (en) | 2000-07-17 | 2001-07-16 | Method and system for determining a cellular phone's position within a communication network |
| AU2001275924A AU2001275924A1 (en) | 2000-07-17 | 2001-07-16 | Method and system for determining a cellular phone's position within a communication network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001228056A CN1184748C (en) | 2000-08-25 | 2000-08-25 | Radio communication, ranging and region positioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1339879A CN1339879A (en) | 2002-03-13 |
| CN1184748C true CN1184748C (en) | 2005-01-12 |
Family
ID=4589326
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001228056A Expired - Fee Related CN1184748C (en) | 2000-07-17 | 2000-08-25 | Radio communication, ranging and region positioning system |
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| Country | Link |
|---|---|
| CN (1) | CN1184748C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100362365C (en) * | 2003-02-07 | 2008-01-16 | 西门子公司 | Method for finding the position of a subscriber in a radio communications system |
| CN101275999B (en) * | 2007-03-28 | 2011-10-12 | 王海舟 | Method and system of traffic communication distance measuring |
| CN101055309B (en) * | 2007-05-25 | 2012-07-04 | 北京东方联星科技有限公司 | Configurable general radio frequency processing method and system of navigation satellite signal |
| CN101210965B (en) * | 2007-12-21 | 2011-06-29 | 新动力(北京)建筑科技有限公司 | Wireless distance finding method, wireless distance finding and position finding method, apparatus and system |
| CN102508199A (en) * | 2011-11-12 | 2012-06-20 | 太原理工大学 | Positioning method based on radio phase discriminating technology |
| CN105044670B (en) * | 2015-07-13 | 2018-04-24 | 重庆大学 | A kind of fireman meets an urgent need indoor locating system |
| CN106413040B (en) * | 2015-07-31 | 2019-06-21 | 北京信威通信技术股份有限公司 | A kind of frequency sweeping method of multicarrier system |
| CN107014360B (en) * | 2017-04-10 | 2019-04-23 | 广州力赛计量检测有限公司 | A kind of positioning system and localization method for antenna or Field probe |
| CN107121675B (en) * | 2017-05-04 | 2020-12-29 | 成都零点科技有限公司 | Remote displacement measuring device, system and method with clutter suppression function |
| CN110018451A (en) * | 2018-01-10 | 2019-07-16 | 于威 | A kind of DOR signal-data processing method based on sparse FFT |
| CN116413713A (en) * | 2021-12-31 | 2023-07-11 | 景玄科技（上海）有限公司 | Regional positioning method, ranging device and electronic equipment |
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|---|---|
| CN1339879A (en) | 2002-03-13 |
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