CN105068094A - High-precision directional signal receiving device and method - Google Patents
High-precision directional signal receiving device and method Download PDFInfo
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- CN105068094A CN105068094A CN201510476996.8A CN201510476996A CN105068094A CN 105068094 A CN105068094 A CN 105068094A CN 201510476996 A CN201510476996 A CN 201510476996A CN 105068094 A CN105068094 A CN 105068094A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related
Abstract
The invention discloses a high-precision directional signal receiving device and a high-precision directional signal receiving method. The high-precision directional signal receiving device comprises a master antenna and a slave antenna, wherein the master antenna is connected with an acquisition module and a master signal tracking loop through a master RF channel; the slave antenna is connected with a slave signal tracking loop through a slave RF channel; the acquisition module is connected with the master signal tracking loop and the slave signal tracking loop; and the master signal tracking loop is connected with the slave signal tracking loop. according to the high-precision directional signal receiving device and the high-precision directional signal receiving method, the two channels share the same acquisition module, thus the number of calling times of the acquisition module is reduced by half and the signal acquisition time is shortened by half when compared with that of the existing master-slave channel independent operation manner; and since signals of the master and slave channels are close, the code phase difference is within a range of one chip, thus the master and slave channels can share a same code generator, thereby saving the resource of one code generator and reducing occupancy of channel resources.
Description
Technical field
The present invention relates to a kind of high-precision fixed to signal receiving device and method.
Background technology
Current satellite navigation direction-finding receiver Signal reception algorithm continues to use the algorithm of location receiver, and principal and subordinate's two passages receiving same satellite signal work alone each other.
Main radio-frequency channel input signal catching through main trapping module, must arrive main channel and catch result, main tracking channel carries out signal trace as initial value; From radio-frequency channel input signal through catching from trapping module, obtain catching result from passage, carry out signal trace from tracking channel as initial value.The each self-contained code NCO of principal and subordinate's tracking channel, separate work.
Existing method signal capture schedule speed is slow, and channel resource consumption is large.
Summary of the invention
Technical matters to be solved by this invention is, not enough for prior art, provides a kind of high-precision fixed to signal receiving device and method.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of high-precision fixed to signal receiving device, comprise main antenna with from antenna: described main antenna is connected with trapping module, main signal track loop by main radio-frequency channel; Described from antenna by being connected from radio-frequency channel with from signal trace loop; Described trapping module is with main signal track loop, be connected from signal trace loop; Described main signal track loop is connected from signal trace loop with described.
Described main signal track loop comprises:
Carrier wave NCO: for generating sine and cosine local signal, and be multiplied with the satellite-signal that main radio-frequency channel exports, peels off carrier wave, obtains in-phase branch signal i (n) and quadrature branch signal q (n);
Code generator: for generating morning, accurate, slow three road precision codes, doing relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtaining the signal that ranging codes are peeled off on six tunnels;
Six coherent integration-removing modules: for accumulating the signal of six tunnels stripping ranging codes respectively, obtain two-way early code tributary signal, two-way slow code tributary signal, the accurate code tributary signal of two-way;
Envelope range value acquisition module: for obtaining the envelope range value of two-way code tributary signal morning, the slow code tributary signal of two-way;
Two non-coherent integration-removing modules: be respectively used to accumulate code tributary signal morning after the process of envelope range value acquisition module, late code tributary signal;
Code phase error detection module: for detecting the code phase error of the signal after two non-coherent integrations-removing resume module;
Code loop filter: for carrying out filtering to the output of code phase error detection module, and filtered signal is exported to a yard NCO;
Code NCO: generate morning, accurate, slow three road precision codes for control code generator;
Carrier loop Discr.: for differentiating the carrier error of two punctual tributary signals;
Carrier loop wave filter: for carrying out filtering process to the output of carrier loop Discr., and the signal after filtering process is exported to carrier wave NCO, generates sinusoidal and cosine local signal for carrier wave NCO.
Describedly to comprise from signal trace loop:
From carrier wave NCO: for generating sine and cosine local signal, and be multiplied with the result of catching exported from radio-frequency channel, peel off carrier wave, obtain in-phase branch signal i (n) and quadrature branch signal q (n), the morning described in-phase branch signal i (n), quadrature branch signal q (n) generated to described main channel code generator, standard, slow three road precision codes do relevant, obtain the signal that ranging code is peeled off on six tunnels;
Six from coherent integration-removing module: for accumulating the signal of six tunnels stripping ranging codes respectively, obtain two-way early code tributary signal, two-way slow code tributary signal, the accurate code tributary signal of two-way;
From envelope range value acquisition module: for obtaining the envelope range value of two-way code tributary signal morning, the slow code tributary signal of two-way;
Two from non-coherent integration-removing module: be respectively used to through accumulating from code tributary signal morning after the process of envelope range value acquisition module, late code tributary signal;
From code phase error detection module: for detecting through two code phase errors from the signal after non-coherent integration-removing resume module;
From code loop filter: for carrying out filtering to the output from code phase error detection module, and filtered signal is exported to from code NCO;
From code NCO: generate morning, accurate, slow three road precision codes for control code generator; From carrier loop Discr.: for differentiating the carrier error of two punctual tributary signals;
From carrier loop wave filter: for carrying out filtering process to the output from carrier loop Discr., and the signal after filtering process is exported to from carrier wave NCO, for generating sinusoidal and cosine local signal from carrier wave NCO.
Present invention also offers a kind of said apparatus that utilizes and realize the high-precision fixed method to Signal reception, the main implementation procedure of the method is: main radio-frequency channel and receive identical satellite-signal from radio-frequency channel, trapping module catches the data of main radio-frequency channel input, after acquisition success, trapping module will be caught result and be exported to main signal track loop and from signal trace loop simultaneously, main signal tracking channel catches result for initial value with from signal trace passage with identical, carries out main radio-frequency channel signal trace respectively and from radio-frequency channel signal trace.
Described main channel signal tracking is: described main radio-frequency channel outputs signal the sine that generates with carrier wave NCO respectively and cosine local signal is multiplied, and peels off carrier wave, obtains in-phase branch signal i (n) and quadrature branch signal q (n); Code generator generates early, accurate, slow three road precision codes, do relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtain the signal that ranging code is peeled off on six tunnels, be respectively iE, iP, iL and qE, qP, qL, the signal of ranging code is peeled off through coherent accumulation in six tunnels, carry out signal accumulation, obtain IE, IP, IL and QE, QP, QL respectively; By two early code tributary signal IE, QE, two slow code tributary signal IL, QL get envelope range value respectively, after carrying out no-coherence cumulating, carry out code phase error detection to envelope range value; Code phase error exports to a yard NCO after code tracking loop filtering, and code NCO control code generator generates early in real time, accurate, slow three road precision codes, exports to from tracking channel by morning, standard, slow three road precision codes simultaneously; Get two punctual tributary signal IP, QP and carry out carrier error discriminating; Carrier error exports to carrier wave NCO after carrier tracking loop filtering, for generating sinusoidal and cosine local signal.
Describedly from channel signal tracking be: to be describedly multiplied with the sine generated from carrier wave NCO and cosine local signal respectively from radio-frequency channel output signal, peel off carrier wave, obtain in-phase branch signal i (n) and quadrature branch signal q (n); The morning inputted by described main channel code NCO, standard, slow three road precision codes do relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtain the signal that ranging code is peeled off on six tunnels, be respectively iE, iP, iL and qE, qP, qL, the signal of ranging code is peeled off through coherent accumulation in six tunnels, obtains IE, IP, IL and QE, QP, QL respectively; By two early code tributary signal IE, QE, two slow code tributary signal IL, QL get envelope range value respectively, after carrying out no-coherence cumulating, carry out code phase error detection to envelope range value; Carrier error is exported to from carrier wave NCO after carrier tracking loop filtering, for generating sinusoidal and cosine local signal.
Compared with prior art, the beneficial effect that the present invention has is: the present invention's two passages share a trapping module, and compared with working alone with existing principal and subordinate's passage, trapping module call number decreases half, signal capture time shorten half; Because principal and subordinate's channel signal is close, code phase error is in 1 chip range, and therefore principal and subordinate's passage can share code generator, can save a code generator resource like this, reduces channel resource and takies.Particularly for needing the application scenario adopting independent special ranging code generating chip, code generator chip demand can be reduced to 1 from 2 by the inventive method, significantly can reduce receiver cost.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention structure drawing of device;
Fig. 2 is one embodiment of the invention main signal track loop structural drawing.
Embodiment
As Fig. 1, the inventive system comprises main antenna with from antenna: described main antenna is connected with trapping module, main signal track loop by main radio-frequency channel; Described from antenna by being connected from radio-frequency channel with from signal trace loop; Described trapping module is with main signal track loop, be connected from signal trace loop; Described main signal track loop is connected from signal trace loop with described.
As Fig. 2, main signal track loop comprises:
Carrier wave NCO: for generating sine and cosine local signal, and be multiplied with the result of catching that main radio-frequency channel exports, peels off carrier wave, obtains in-phase branch signal i (n) and quadrature branch signal q (n);
Code generator: for generating morning, accurate, slow three road precision codes, doing relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtaining the signal that ranging codes are peeled off on six tunnels;
Six coherent integration-removing modules: for carrying out coherent accumulation to the signal of six tunnels stripping ranging codes respectively, obtain two-way early code tributary signal, two-way slow code tributary signal, the accurate code tributary signal of two-way;
Envelope range value acquisition module: for obtaining the envelope range value of two-way code tributary signal morning, the slow code tributary signal of two-way;
Two non-coherent integration-removing modules: be respectively used to carry out no-coherence cumulating to code tributary signal morning after the process of envelope range value acquisition module, late code tributary signal;
Code phase error detection module: for detecting the code phase error of the signal after two integrate and dump resume module;
Code loop filter: for carrying out filtering to the output of code phase error detection module, and filtered signal is exported to a yard NCO;
Code NCO: generate morning, accurate, slow three road precision codes for control code generator;
Carrier loop Discr.: for differentiating the carrier error of two punctual tributary signals;
Carrier loop wave filter: for carrying out filtering process to the output of carrier loop Discr., and the signal after filtering process is exported to carrier wave NCO, generates sinusoidal and cosine local signal for carrier wave NCO.
The first step of digital signal processing carries out signal capture.The satellite that principal and subordinate's channel reception is identical, trapping module is only connected with main radio-frequency channel, catches the data of main radio-frequency channel input.After acquisition success, the result of catching of trapping module is exported to simultaneously and advocated peace from signal trace loop.Principal and subordinate's passage is caught result for initial value carry out signal trace respectively with identical.Because the spacing of principal and subordinate's antenna is less than 15 meters usually, two interchannel code phase errors are within 1 chip, and therefore principal and subordinate's passage shares and samely catches the error originated from input scope that result can meet follow-up signal track loop.
In signal trace loop, principal and subordinate's passage shares a code generator, and its principle as shown in Figure 2.
In main signal track loop, the sine that main radio-frequency channel input signal generates with carrier wave NCO respectively and cosine local signal are multiplied, and peel off carrier wave, obtain in-phase branch i (n) and quadrature branch q (n).Code generator generates early, accurate, slow three road precision codes, do relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtain the signal that ranging code is peeled off on 6 tunnels, be respectively iE, iP, iL and qE, qP, qL, 6 road signals, through coherent accumulation, obtain IE, IP, IL and QE, QP, QL respectively.By two early code branch road IE, QE, two slow code branch road IL, QL get envelope range value respectively, after carrying out coherent accumulation, carry out code phase error detection to envelope range value.Code phase error exports to a yard NCO after code tracking loop filtering, generates morning, accurate, slow three road precision codes in real time by code NCO control code generator.Three road codes are exported to from passage simultaneously.Get two punctual branch road IP, QP and carry out carrier error discriminating.Carrier phase error exports to carrier wave NCO after carrier tracking loop filtering, for generating sinusoidal and cosine local signal.
From the signal trace loop procedure of passage and main channel basically identical, do not comprise code generator unlike from passage, the code generator of main channel is directly received from passage, and principal and subordinate's passage shares identical ranging code.Because principal and subordinate's channel signal is close, code phase error is in 1 chip range, and therefore principal and subordinate's passage can share code generator, can save a code generator resource like this, reduces channel resource and takies.Particularly for needing the application scenario adopting independent special ranging code generating chip, code generator chip demand can be reduced to 1 from 2 by the inventive method, significantly can reduce receiver cost.
Claims (7)
1. high-precision fixed to a signal receiving device, it is characterized in that, comprise main antenna with from antenna: described main antenna is connected with trapping module, main signal track loop by main radio-frequency channel; Described from antenna by being connected from radio-frequency channel with from signal trace loop; Described trapping module is with main signal track loop, be connected from signal trace loop; Described main signal track loop is connected from signal trace loop with described.
2. according to claim 1 high-precision fixed to signal receiving device, it is characterized in that, described main antenna, be less than 15 meters from the distance between antenna.
3. according to claim 1 and 2 high-precision fixed to signal receiving device, it is characterized in that, described main signal track loop comprises:
Carrier wave NCO: for generating sine and cosine local signal, and be multiplied with the satellite-signal that main radio-frequency channel exports, peels off carrier wave, obtains in-phase branch signal i (n) and quadrature branch signal q (n);
Code generator: for generating morning, accurate, slow three road precision codes, doing relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtaining the signal that ranging codes are peeled off on six tunnels;
Six coherent integration-removing modules: for accumulating the signal of six tunnels stripping ranging codes respectively, obtain two-way early code tributary signal, two-way slow code tributary signal, the accurate code tributary signal of two-way;
Envelope range value acquisition module: for obtaining the envelope range value of two-way code tributary signal morning, the slow code tributary signal of two-way;
Two non-coherent integration-removing modules: be respectively used to accumulate code tributary signal morning after the process of envelope range value acquisition module, late code tributary signal;
Code phase error detection module: for detecting the code phase error of the signal after two non-coherent integrations-removing resume module;
Code loop filter: for carrying out filtering to the output of code phase error detection module, and filtered signal is exported to a yard NCO;
Code NCO: generate morning, accurate, slow three road precision codes for control code generator;
Carrier loop Discr.: for differentiating the carrier error of two punctual tributary signals;
Carrier loop wave filter: for carrying out filtering process to the output of carrier loop Discr., and the signal after filtering process is exported to carrier wave NCO, generates sinusoidal and cosine local signal for carrier wave NCO.
4. according to claim 3 high-precision fixed to signal receiving device, it is characterized in that, describedly to comprise from signal trace loop:
From carrier wave NCO: for generating sine and cosine local signal, and be multiplied with the result of catching exported from radio-frequency channel, peel off carrier wave, obtain in-phase branch signal i (n) and quadrature branch signal q (n), the morning described in-phase branch signal i (n), quadrature branch signal q (n) generated to described main channel code generator, standard, slow three road precision codes do relevant, obtain the signal that ranging code is peeled off on six tunnels;
Six from coherent integration-removing module: for accumulating the signal of six tunnels stripping ranging codes respectively, obtain two-way early code tributary signal, two-way slow code tributary signal, the accurate code tributary signal of two-way;
From envelope range value acquisition module: for obtaining the envelope range value of two-way code tributary signal morning, the slow code tributary signal of two-way;
Two from non-coherent integration-removing module: be respectively used to through accumulating from code tributary signal morning after the process of envelope range value acquisition module, late code tributary signal;
From code phase error detection module: for detecting through two code phase errors from the signal after non-coherent integration-removing resume module;
From code loop filter: for carrying out filtering to the output from code phase error detection module, and filtered signal is exported to from code NCO;
From code NCO: generate morning, accurate, slow three road precision codes for control code generator; From carrier loop Discr.: for differentiating the carrier error of two punctual tributary signals;
From carrier loop wave filter: for carrying out filtering process to the output from carrier loop Discr., and the signal after filtering process is exported to from carrier wave NCO, for generating sinusoidal and cosine local signal from carrier wave NCO.
5. one kind utilizes the device described in claim 4 to realize the high-precision fixed method to Signal reception, it is characterized in that, the main implementation procedure of the method is: main radio-frequency channel and receive identical satellite-signal from radio-frequency channel, trapping module catches the data of main radio-frequency channel input, after acquisition success, trapping module will be caught result and be exported to main signal track loop and from signal trace loop simultaneously, main signal tracking channel catches result for initial value with from signal trace passage with identical, carries out main radio-frequency channel signal trace respectively and from radio-frequency channel signal trace.
6. method according to claim 5, it is characterized in that, described main channel signal tracking is: described main radio-frequency channel outputs signal the sine that generates with carrier wave NCO respectively and cosine local signal is multiplied, peel off carrier wave, obtain in-phase branch signal i (n) and quadrature branch signal q (n); Code generator generates early, accurate, slow three road precision codes, do relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtain the signal that ranging code is peeled off on six tunnels, be respectively iE, iP, iL and qE, qP, qL, the signal of ranging code is peeled off through coherent accumulation in six tunnels, carry out signal accumulation, obtain IE, IP, IL and QE, QP, QL respectively; By two early code tributary signal IE, QE, two slow code tributary signal IL, QL get envelope range value respectively, after carrying out no-coherence cumulating, carry out code phase error detection to envelope range value; Code phase error exports to a yard NCO after code tracking loop filtering, and code NCO control code generator generates early in real time, accurate, slow three road precision codes, exports to from tracking channel by morning, standard, slow three road precision codes simultaneously; Get two punctual tributary signal IP, QP and carry out carrier error discriminating; Carrier error exports to carrier wave NCO after carrier tracking loop filtering, for generating sinusoidal and cosine local signal.
7. method according to claim 6, it is characterized in that, describedly from channel signal tracking be: to be describedly multiplied with the sine generated from carrier wave NCO and cosine local signal respectively from radio-frequency channel output signal, peel off carrier wave, obtain in-phase branch signal i (n) and quadrature branch signal q (n); The morning inputted by described main channel code NCO, standard, slow three road precision codes do relevant to in-phase branch signal i (n) and quadrature branch signal q (n) respectively, obtain the signal that ranging code is peeled off on six tunnels, be respectively iE, iP, iL and qE, qP, qL, the signal of ranging code is peeled off through coherent accumulation in six tunnels, obtains IE, IP, IL and QE, QP, QL respectively; By two early code tributary signal IE, QE, two slow code tributary signal IL, QL get envelope range value respectively, after carrying out no-coherence cumulating, carry out code phase error detection to envelope range value; Carrier error is exported to from carrier wave NCO after carrier tracking loop filtering, for generating sinusoidal and cosine local signal.
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