CN107085222A - A kind of BOC signal acquisition methods and satellite navigation receiver - Google Patents
A kind of BOC signal acquisition methods and satellite navigation receiver Download PDFInfo
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- CN107085222A CN107085222A CN201710352110.8A CN201710352110A CN107085222A CN 107085222 A CN107085222 A CN 107085222A CN 201710352110 A CN201710352110 A CN 201710352110A CN 107085222 A CN107085222 A CN 107085222A
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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
Abstract
The present invention is applied to satellite navigation positioning, and there is provided a kind of BOC signal acquisition methods and satellite navigation receiver.Methods described includes：Receive the intermediate frequency BOC signals of multistage predetermined length；The mode of quadrature demodulation is respectively adopted in the intermediate frequency BOC signals of multistage predetermined length and local carrier is mixed to carry out carrier wave stripping, in-phase signal and orthogonal signalling is obtained；Local BOC signals are split as strange cell signal and even cell signal simultaneously；The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed, and obtains the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated, and obtains final detection limit；Judge whether BOC signals accurately capture according to final detection limit.While its narrow related main peak advantage is retained multimodality is completely eliminated, and improve acquisition sensitivity in the present invention.
Description
Technical field
The invention belongs to satellite navigation positioning technical field, more particularly to a kind of BOC signal acquisition methods and satellite navigation
Receiver.
Background technology
Current GNSS (Global Navigation Satellite System, GPS) is mainly wrapped
Include：GPS (Global Positioning System, global positioning system), the GLONASS (GLONASSs of Russia in the U.S.
Satellite navigation system), the BD (Beidou satellite navigation system) of China and European Galileo (Galilean satellite alignment system).
These systems are generally modulated using BOC (Binary Offset Carrier, binary offset carrier).With BPSK (Binary
Phase Shift Keying, binary phase shift keying) modulation compare, BOC modulation advantage be mainly two aspects：One is
Square wave subcarrier premodulated pseudo noise code is first used in BOC modulation so that signal spectrum symmetrical fissions in band edge, and separation away from
Change from the change with order of modulation, make full use of limited frequency spectrum resource, reduce the interference between signal；Two be that BOC is adjusted
There is narrower related main peak in the auto-correlation function of system, beneficial to raising acquisition accuracy.The major defect of BOC modulated signals is：BOC
There is multimodality in the auto-correlation function of modulation, easily side is caught by mistake in acquisition procedure in the span of chips of main peak both sides ± 1
Peak, causes to capture fuzziness.The method that problem is caught in elimination by mistake is broadly divided into two classes：One is BPSK LIKE (class binary phase-shift keys
Control method) method, BOC signals are regarded to the superposition of multiple bpsk signals as, obtained detection peak is one unimodal, but its related main peak
Span is widened 1 chip, and the processing of linear filter causes the loss of signal energy, increases the complexity of receiver；Two be phase
The method for closing function reconstruct, such as ASPeCT (autocorrelation side-peak cancellation technique, from
Dependence edge peak null method) itself and PRN (pseudo-random square are subtracted using BOC (n, n) signal auto-correlation function
Noise, pseudo noise) sequence cross-correlation function square, do the processing of side peak cancellation, effectively inhibit at same code phase
Bian Feng, but the algorithm to the elimination of multimodality not fully, it is adaptable to BOC (n, n) signal.BOC modulated signals mainly include
Two parameters：Sub-carrier frequencies fsWith chip rate fc.Symbolically is BOC (m, n), and wherein m represents that sub-carrier frequencies fs is
M times of reference frequency, n represents chip rate fcIt is n times of reference frequency, wherein reference frequency is 1.023MHz.As m=n,
BOC modulated signals are designated as BOC (n, n).SCM (Side-peak Cancellation Scheme, side peak null method) using with
Subcarrier cycle identical, the adjustable reference signal of dutycycle does related to receiving BOC signals, complete by reconstructing correlation function
The side peak except auto-correlation function is totally disappeared, but the amplitude of its related main peak can be reduced.
The content of the invention
It is an object of the invention to provide a kind of BOC signal acquisition methods, satellite navigation receiver and computer-readable deposit
Storage media, it is intended to solve prior art eliminate caught by mistake caused by auto-correlation function multimodality in BOC signals or the algorithm of leakage in,
What is had can eliminate multimodality, and can not retain the characteristic of its narrow related main peak, and what is had can retain the characteristic of narrow related main peak, but
Multimodality eliminates incomplete problem.
In a first aspect, the invention provides a kind of BOC signal acquisition methods, methods described includes：
Receive the intermediate frequency BOC signals of multistage predetermined length；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out
Carrier wave is peeled off, and obtains in-phase signal and orthogonal signalling；Local BOC signals are split as strange cell signal simultaneously and even unit is believed
Number；
The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed,
Obtain the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；
Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated,
Obtain final detection limit；
Judge whether BOC signals accurately capture according to final detection limit.
Second aspect, the invention provides a kind of computer-readable recording medium, it is stored for electronic data interchange
Computer program, the computer program causes computer to perform BOC signal acquisition methods described above.
The third aspect, the invention provides a kind of satellite navigation receiver, including：
One or more processors；
Memory；And
One or more programs, wherein one or more of programs are stored in the memory, and are configured
Into by one or more of computing devices, described program includes the instruction for being used to perform following steps：
Receive the intermediate frequency BOC signals of multistage predetermined length；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out
Carrier wave is peeled off, and obtains in-phase signal and orthogonal signalling；Local BOC signals are split as strange cell signal simultaneously and even unit is believed
Number；
The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed,
Obtain the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；
Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated,
Obtain final detection limit；
Judge whether BOC signals accurately capture according to final detection limit.
In the present invention, due to thought of the BOC signal acquisition methods based on splitting and reorganizing, ground BOC signals are split as very
Cell signal and even cell signal, the unit of the BOC signals after strange cell signal and even cell signal are peeled off to carrier wave are related
Function is reconstructed, and obtains the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；Using noncoherent mode,
The detection limit that nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated, and obtains final detection limit.Therefore protecting
While staying its narrow related main peak advantage, multimodality is completely eliminated, and improve acquisition sensitivity.Caught this avoid multimodality
During obtaining caused by catch by mistake with leakage problem so that improve acquisition accuracy and reduce search time.In addition, the present invention is can be full
Sufficient BOC (n, n), TMBOC (6, Isosorbide-5-Nitrae/33) captured with CBOC (6,1,1/11) modulated signal without fuzziness, i.e., suitable for current
The main BOC modulation used in major satellite navigation systems, it is ensured that algorithm applicability is extensive.
Brief description of the drawings
Fig. 1 is the BOC signal acquisition methods flow charts that the embodiment of the present invention one is provided.
Fig. 2 is the BOC signal acquisition methods that the embodiment of the present invention one is provided, i.e. unit correlation method and prior art
The detection probability of ASPeCT methods and BPSK-LIKE methods and carrier-to-noise ratio relation curve.
Fig. 3 is 3 D captured result figure of the unit correlation method to BOC (1,1) signal when carrier-to-noise ratio is 39dBHz.
Fig. 4 is two dimension capture result figure of the ASPeCT methods to BOC (1,1).
Fig. 5 is two dimension capture result figure of the unit correlation method to BOC (1,1).
Fig. 6 is the concrete structure block diagram for the satellite navigation receiver that the embodiment of the present invention three is provided.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Embodiment one：
The BOC signal acquisition methods that the embodiment of the present invention one is provided comprise the following steps：
S101, the intermediate frequency BOC signals for receiving multistage predetermined length.
In the embodiment of the present invention one, S101 is specifically as follows：
The intermediate frequency BOC signals of M sections of 1ms length are received, S is designated as(l)(t), wherein l=1,2 ..., M, M are greater than or waited
In 2 natural number.
The mathematic(al) representation of the intermediate frequency BOC signals of reception is as follows：
Wherein：PsFor the power of input signal, C (t) is pseudo noise code, and D (t) is navigation message, and τ is the code of input signal
Delay, fDFor the Doppler frequency shift of input signal, fIFFor signal intermediate frequency, SC (t) is subcarrier, and n (t) is white noise.
S102, the mode and local carrier that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted to quadrature demodulation are mixed
To carry out carrier wave stripping, in-phase signal and orthogonal signalling are obtained；Local BOC signals are split as strange cell signal and even single simultaneously
First signal.
It is described that quadrature demodulation is respectively adopted in the intermediate frequency BOC signals of multistage predetermined length in the embodiment of the present invention one
Mode is mixed to carry out carrier wave stripping with local carrier, obtains in-phase signal and orthogonal signalling are specifically as follows：
The mode that the intermediate frequency BOC signals of M sections of 1ms length are respectively adopted into quadrature demodulation is mixed with local carrier to be carried
Ripple is peeled off, and obtains in-phase signal I(l)(t) with orthogonal signalling Q(l)(t).Wherein,
Navigation data bits saltus step is not considered in above formula, navigation message D is that constant can be saved, TsFor the cycle of BOC signals,
n(l)(t) white noise for l sections.
It is described local BOC signals to be split as strange cell signal and even cell signal is specifically as follows：
Local PRN code modulating subcarrier obtains BOC signals, and local BOC signals are split as into strange cell signal CO(t) it is and even
Cell signal CE(t)。
Wherein, the mathematical modeling of local PRN code is：
Wherein, TcIt is a spread-spectrum code chip cycle,It is T in the cycle to becRectangular pulse, CiIt is the symbol of i-th of chip
Number, Ci∈(-1,1)。
Locally BOC (n, n) subcarrier mathematical modeling is：
Wherein,It is T in the cycle to bescRectangular pulse, djIt is T each duration of subcarrier that={ 1, -1 }, which is,SC's
Impulse code, and TSC=TC/ 2, N are the subcarrier pulse sums in a pseudorandom chip.Because subcarrier and PRN code are tight
Lattice synchronization, above-mentioned two mathematical modeling is utilized, local BOC (n, n) sequence is produced：
The each chip of local BOC (n, n) sequence is divided into 2 equal portions, each identical equal portions of pseudorandom chip is intercepted successively
Clip information, strange cell signal C can be split asO(t) with even cell signal CE(t).Strange cell signal CO(t) with even unit
Signal CE(t) it is as follows respectively：
S103, the unit correlation function progress by the BOC signals after strange cell signal and even cell signal and carrier wave stripping
Reconstruct, obtains the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length.
In the embodiment of the present invention one, S103 specifically includes following steps：
To in-phase signal I(l)With orthogonal signalling Q(l)Complex signal I+jQ modulus；
By the output of modulus and strange cell signal CO(t)With even cell signal CE(t) it is multiplied respectively, it is integrated, respectively obtain
L sections of first integral resultWith second integral result
Wherein：RO(Δτ)、RE(Δ τ) is respectively the unit phase of strange cell signal and even cell signal with receiving BOC signals
Function is closed, Δ τ is code phase error, Δ fDFor Doppler's residual error, NO、NEFor white Gaussian noise, it is 0 to obey average, and variance is σ2
Gaussian Profile, be reduced to：
L sections of first integral resultWith second integral resultThird integral result is obtained according to reconfiguration ruleWith the 4th integral resultAgain by third integral resultWith the 4th integral resultModulus is subtracted each other, and obtains no mould
The detection limit of paste
L sections of first integral resultWith second integral resultThird integral result is obtained according to reconfiguration ruleWith the 4th integral resultSpecially：
L sections of first integral resultWith second integral resultIt is added according to reconfiguration ruleSubtract each other
Arrive
S104, using noncoherent mode, the fuzzy detection limit of nothing to the intermediate frequency BOC signals of multistage predetermined length is carried out
Restructuring, obtains final detection limit.
In the embodiment of the present invention one, S104 specifically includes following steps：
The detection limit obscured using noncoherent mode, the nothing to the intermediate frequency BOC signals of M sections of predetermined lengthsWeighed
Group, obtains final detection limit Sc。
Wherein,
S105, according to final detection limit judge whether BOC signals accurately capture.
In the embodiment of the present invention one, S105 specifically may comprise steps of：
Judge final detection limit ScWhether default detection threshold value is more than, if detection limit is more than detection threshold value,
Judge that BOC signals are accurately captured, if detection limit is less than detection threshold value, reselect satellite number, produce local BOC codes,
It is then back to step S101.
Fig. 2 be the embodiment of the present invention one provide BOC signal acquisition methods in unit correlation method and prior art
The detection probability of ASPeCT methods and BPSK-LIKE methods and carrier-to-noise ratio relation curve.The influence factor and biography of BOC signal detection performances
The difference of system bpsk signal, by noise and other peak joint effect.Assuming that input BOC (1,1) signal, coherent integration time is 1ms,
False-alarm probability Pfa=10-3.If using 90% detection probability as standard, it is about 42dBHz's that ASPeCT methods, which can detect carrier-to-noise ratio,
Signal, unit correlation method detects the signal that carrier-to-noise ratio is about 39dBHz, and acquisition sensitivity about improves 3dBHz.
When carrier-to-noise ratio is 39dBHz, unit correlation method to the 3 D captured result figure of BOC (1,1) signal as shown in figure 3,
Capture obtained code phase, Doppler frequency consistent with default parameter in emulation.Unit correlation method is realized based on Matlab
Emulation, inputs BOC (1,1) signal, and setting centre frequency is fIF=4.309MHz, sample frequency is fS=40.92MHz, is concerned with
The time of integration is T=1ms, and doppler range is [- 10KHz, 10KHz], and stepping takes 1000Hz, and Doppler shift is
fD=2000Hz, code skew is the sampled point of τ=601.
Fig. 4 and Fig. 5 are respectively the two-dimentional capture result figure of the normalization of ASPeCT methods, unit correlation method to BOC (1,1), with
Maximum correlation peaks are as search thresholding, and the parameter for capturing estimation is consistent with default parameter.Simulation result shows, unit phase
Pass method can keep the characteristic of the narrow related main peak of BOC signals to ASPeCT methods, but multimodal can not be completely eliminated in ASPeCT methods
Property；AndIn chip range, the value of the other blob detection amount of ASPeCT methods is 0.0949, the other blob detection of unit correlation method
The value of amount is about 0.001, i.e., in the range of estimation same code phase error τ=1/3, unit correlation method catches other peak probability by mistake is
The 1.05% of ASPeCT methods.
In the embodiment of the present invention one, due to thought of the BOC signal acquisition methods based on splitting and reorganizing, by ground BOC signals
Strange cell signal and even cell signal are split as, the BOC signals after strange cell signal and even cell signal are peeled off with carrier wave
Unit correlation function is reconstructed, and obtains the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；Using incoherent
Mode, the fuzzy detection limit of the nothing to the intermediate frequency BOC signals of multistage predetermined length recombinates, and obtains final detection limit.
Therefore while its narrow related main peak advantage is retained, multimodality is completely eliminated, and improve acquisition sensitivity.This avoid many
Peak in acquisition procedure caused by catch by mistake with leakage problem so that improve acquisition accuracy and reduce search time.In addition, this hair
It is bright be can meet BOC (n, n), TMBOC (6, Isosorbide-5-Nitrae/33) and CBOC (6,1,1/11) modulated signal without fuzziness capture, that is, fit
For the main BOC modulation used in current major satellite navigation systems, it is ensured that algorithm applicability is extensive.Simulation result table
It is bright：During M=2, the acquisition sensitivity based on related BOC (n, n) the signal capture algorithm of unit is improved about than ASPeCT method
3dBHz, operand is the 41.46% of ASPeCT methods.
The embodiment of the present invention two additionally provides a kind of computer-readable recording medium, and it is stored for electronic data interchange
Computer program, the computer program causes computer to perform the BOC signal acquisition methods such as the embodiment of the present invention one.
Embodiment three：
Fig. 6 shows the concrete structure block diagram for the satellite navigation receiver that the embodiment of the present invention three is provided, the satellite navigation
Receiver 100, including：
One or more processors 102；
Memory 101；And
One or more programs, wherein one or more of programs are stored in the memory 101, and by with
It is set to and is performed by one or more of processors 102, described program includes the instruction for being used to perform following steps：
Receive the intermediate frequency BOC signals of multistage predetermined length；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out
Carrier wave is peeled off, and obtains in-phase signal and orthogonal signalling；Local BOC signals are split as strange cell signal simultaneously and even unit is believed
Number；
The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed,
Obtain the fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；
Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated,
Obtain final detection limit；
Judge whether BOC signals accurately capture according to final detection limit.
In the embodiment of the present invention three,
The intermediate frequency BOC signals for receiving multistage predetermined length are specifically as follows：
Receive the intermediate frequency BOC signals S of M sections of 1ms length(l)(t), wherein l=1,2 ..., M, M are greater than or equal to 2
Natural number.
It is described by the intermediate frequency BOC signals of multistage predetermined length be respectively adopted the mode of quadrature demodulation and local carrier be mixed with
Carrier wave stripping is carried out, in-phase signal is obtained and orthogonal signalling is specifically as follows：
The mode that the intermediate frequency BOC signals of M sections of 1ms length are respectively adopted into quadrature demodulation is mixed with local carrier to be carried
Ripple is peeled off, and obtains in-phase signal I(l)(t) with orthogonal signalling Q(l)(t), wherein,
Wherein, fDFor the Doppler frequency shift of input signal, fIFFor signal intermediate frequency, TsFor the cycle of BOC signals, n(l)(t) it is
L sections of white noise.
It is described local BOC signals to be split as strange cell signal and even cell signal is specifically as follows：
Local pseudo random number PRN code modulating subcarrier obtains BOC signals, and local BOC signals are split as into strange cell signal
CO(t) with even cell signal CE(t)；
Wherein, the mathematical modeling of local PRN code is：
Wherein, TcIt is a spread-spectrum code chip cycle,It is T in the cycle to becRectangular pulse, CiIt is the symbol of i-th of chip
Number, Ci∈(-1,1)；
Locally BOC (n, n) subcarrier mathematical modeling is：
Wherein,It is T in the cycle to bescRectangular pulse, djIt is T each duration of subcarrier that={ 1, -1 }, which is,SC's
Impulse code, and TSC=TC/ 2, N are the subcarrier pulse sums in a pseudorandom chip, using above-mentioned two mathematical modeling,
Produce local BOC (n, n) sequence：
The each chip of local BOC (n, n) sequence is divided into 2 equal portions, each identical equal portions of pseudorandom chip is intercepted successively
Clip information, be split as strange cell signal CO(t) with even cell signal CE(t) it is as follows respectively：
It is described to be weighed strange cell signal and even cell signal and the unit correlation function of the BOC signals after carrier wave stripping
Structure, obtaining the fuzzy detection limit of nothing of the intermediate frequency BOC signals of multistage predetermined length can specifically include：
To in-phase signal I(l)With orthogonal signalling Q(l)Complex signal I+jQ modulus；
By the output of modulus and strange cell signal CO(t) with even cell signal CE(t) it is multiplied respectively, it is integrated, respectively obtain
L sections of first integral resultWith second integral result
L sections of first integral resultWith second integral resultThe 4th integration knot is added to obtain according to reconfiguration rule
ReallySubtract each other and obtain third integral resultAgain by third integral resultWith the 4th integral resultModulus phase
Subtract, obtain without fuzzy detection limit
Described to utilize noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is carried out
Restructuring, obtaining final detection limit can specifically include：
The detection limit obscured using noncoherent mode, the nothing to the intermediate frequency BOC signals of M sections of predetermined lengthsWeighed
Group, obtains final detection limit Sc, wherein,
The final detection limit of the basis, which judges whether BOC signals accurately capture, can specifically include：
Judge final detection limit ScWhether default detection threshold value is more than, if detection limit is more than detection threshold value,
Judge that BOC signals are accurately captured, if detection limit is less than detection threshold value, reselect satellite number, produce local BOC codes,
The step of being then back to the intermediate frequency BOC signals of the reception multistage predetermined length.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of binary offset carrier BOC signal acquisition methods, it is characterised in that methods described includes：
Receive the intermediate frequency BOC signals of multistage predetermined length；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out carrier wave
Peel off, obtain in-phase signal and orthogonal signalling；Local BOC signals are split as strange cell signal and even cell signal simultaneously；
The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed, and obtains
The fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；
Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated, obtained
Final detection limit；
Judge whether BOC signals accurately capture according to final detection limit.
2. the method as described in claim 1, it is characterised in that the intermediate frequency BOC signals of the reception multistage predetermined length are specific
For：
Receive the intermediate frequency BOC signals S of M sections of 1ms length(l)(t), wherein l=1,2 ..., M, M are greater than or equal to 2 nature
Number.
3. method as claimed in claim 2, it is characterised in that described to adopt the intermediate frequency BOC signals of multistage predetermined length respectively
It is mixed with the mode and local carrier of quadrature demodulation to carry out carrier wave stripping, obtains in-phase signal and orthogonal signalling are specially：
The mode that the intermediate frequency BOC signals of M sections of 1ms length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out carrier wave stripping
From obtaining in-phase signal I(l)(t) with orthogonal signalling Q(l)(t), wherein,
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</mtd>
</mtr>
<mtr>
<mtd>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mo>&lsqb;</mo>
<mn>2</mn>
<mi>&pi;</mi>
<mo>(</mo>
<msub>
<mi>f</mi>
<mrow>
<mi>I</mi>
<mi>F</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>f</mi>
<mi>D</mi>
</msub>
<mo>)</mo>
<msub>
<mi>T</mi>
<mi>s</mi>
</msub>
<mo>&rsqb;</mo>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>+</mo>
<msup>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
</mrow>
Wherein, fDFor the Doppler frequency shift of input signal, fIFFor signal intermediate frequency, TsFor the cycle of BOC signals, n(l)(t) it is l sections
White noise.
4. method as claimed in claim 3, it is characterised in that described that local BOC signals are split as strange cell signal and idol
Cell signal is specially：
Local pseudo noise PRN code modulating subcarrier obtains BOC signals, and local BOC signals are split as into strange cell signal CO
(t) with even cell signal CE(t)；
Wherein, the mathematical modeling of local PRN code is：
<mrow>
<mi>P</mi>
<mi>R</mi>
<mi>N</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mi>C</mi>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein, TcIt is a spread-spectrum code chip cycle,It is T in the cycle to becRectangular pulse, CiIt is the symbol of i-th of chip, Ci∈
(-1,1)；
Locally BOC (n, n) subcarrier mathematical modeling is：
<mrow>
<mi>S</mi>
<mi>c</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<mrow>
<mi>N</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</munderover>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein,It is T in the cycle to bescRectangular pulse, djIt is T each duration of subcarrier that={ 1, -1 }, which is,SCPulse
Symbol, and TSC=TC/ 2, N are the subcarrier pulse sums in a pseudorandom chip, using above-mentioned two mathematical modeling, are produced
Local BOC (n, n) sequence：
<mrow>
<msub>
<mi>S</mi>
<mrow>
<mi>B</mi>
<mi>O</mi>
<mi>C</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<mrow>
<mi>N</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
The each chip of local BOC (n, n) sequence is divided into 2 equal portions, the code of each identical equal portions of pseudorandom chip is intercepted successively
Piece information, is split as strange cell signal CO(t) with even cell signal CE(t) it is as follows respectively：
<mrow>
<msub>
<mi>C</mi>
<mi>O</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>C</mi>
<mi>E</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>.</mo>
</mrow>
5. method as claimed in claim 4, it is characterised in that described to peel off strange cell signal and even cell signal with carrier wave
The unit correlation function of BOC signals afterwards is reconstructed, and obtains the fuzzy detection of the nothing of the intermediate frequency BOC signals of multistage predetermined length
Amount is specifically included：
To in-phase signal I(l)With orthogonal signalling Q(l)Complex signal I+jQ modulus；
By the output of modulus and strange cell signal CO(t) with even cell signal CE(t) it is multiplied respectively, it is integrated, respectively obtain l
The first integral result of sectionWith second integral result
L sections of first integral resultWith second integral resultThe 4th integral result is added to obtain according to reconfiguration ruleSubtract each other and obtain third integral resultAgain by third integral resultWith the 4th integral resultModulus is subtracted each other,
Obtain without fuzzy detection limit
6. method as claimed in claim 5, it is characterised in that described to utilize noncoherent mode, to multistage predetermined length
The fuzzy detection limit of the nothing of intermediate frequency BOC signals is recombinated, and is obtained final detection limit and is specifically included：
The detection limit obscured using noncoherent mode, the nothing to the intermediate frequency BOC signals of M sections of predetermined lengthsRecombinated, obtained
To final detection limit Sc, wherein,
7. method as claimed in claim 6, it is characterised in that the final detection limit of the basis judges whether BOC signals are accurate
Really capture is specifically included：
Judge final detection limit ScWhether it is more than default detection threshold value, if detection limit is more than detection threshold value, judges
BOC signals are accurately captured, if detection limit is less than detection threshold value, are reselected satellite number, are produced local BOC codes, then
The step of returning to the intermediate frequency BOC signals of the reception multistage predetermined length.
8. a kind of computer-readable recording medium, it stores the computer program for electronic data interchange, it is characterised in that institute
Computer program is stated so that computer performs the BOC signal acquisition methods as described in any one of claim 1 to 7.
9. a kind of satellite navigation receiver, including：
One or more processors；
Memory；And
One or more programs, wherein one or more of programs are stored in the memory, and be configured to by
One or more of computing devices, described program includes the instruction for being used to perform following steps：
Receive the intermediate frequency BOC signals of multistage predetermined length；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out carrier wave
Peel off, obtain in-phase signal and orthogonal signalling；Local BOC signals are split as strange cell signal and even cell signal simultaneously；
The unit correlation function of BOC signals after strange cell signal and even cell signal are peeled off with carrier wave is reconstructed, and obtains
The fuzzy detection limit of the nothing of the intermediate frequency BOC signals of multistage predetermined length；
Using noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated, obtained
Final detection limit；
Judge whether BOC signals accurately capture according to final detection limit.
10. satellite navigation receiver as claimed in claim 9, it is characterised in that
It is described receive multistage predetermined length intermediate frequency BOC signals be specially：
Receive the intermediate frequency BOC signals S of M sections of 1ms length(l)(t), wherein l=1,2 ..., M, M are greater than or equal to 2 nature
Number；
The mode that the intermediate frequency BOC signals of multistage predetermined length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out
Carrier wave is peeled off, and obtains in-phase signal and orthogonal signalling are specially：
The mode that the intermediate frequency BOC signals of M sections of 1ms length are respectively adopted into quadrature demodulation is mixed with local carrier to carry out carrier wave stripping
From obtaining in-phase signal I(l)(t) with orthogonal signalling Q(l)(t), wherein,
<mrow>
<msup>
<mi>I</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msup>
<mi>S</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mo>&lsqb;</mo>
<mn>2</mn>
<mi>&pi;</mi>
<mo>(</mo>
<msub>
<mi>f</mi>
<mrow>
<mi>I</mi>
<mi>F</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>f</mi>
<mi>D</mi>
</msub>
<mo>)</mo>
<mi>t</mi>
<mo>&rsqb;</mo>
<mo>+</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mo>&lsqb;</mo>
<mn>2</mn>
<mi>&pi;</mi>
<mo>(</mo>
<msub>
<mi>f</mi>
<mrow>
<mi>I</mi>
<mi>F</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>f</mi>
<mi>D</mi>
</msub>
<mo>)</mo>
<msub>
<mi>T</mi>
<mi>s</mi>
</msub>
<mo>&rsqb;</mo>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>+</mo>
<msup>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msup>
<mi>Q</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msup>
<mi>S</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mfenced open = "[" close = "]">
<mtable>
<mtr>
<mtd>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mo>&lsqb;</mo>
<mn>2</mn>
<mi>&pi;</mi>
<mo>(</mo>
<msub>
<mi>f</mi>
<mrow>
<mi>I</mi>
<mi>F</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>f</mi>
<mi>D</mi>
</msub>
<mo>)</mo>
<mi>t</mi>
<mo>&rsqb;</mo>
<mo>+</mo>
</mtd>
</mtr>
<mtr>
<mtd>
<mi>c</mi>
<mi>o</mi>
<mi>s</mi>
<mo>&lsqb;</mo>
<mn>2</mn>
<mi>&pi;</mi>
<mo>(</mo>
<msub>
<mi>f</mi>
<mrow>
<mi>I</mi>
<mi>F</mi>
</mrow>
</msub>
<mo>+</mo>
<msub>
<mi>f</mi>
<mi>D</mi>
</msub>
<mo>)</mo>
<msub>
<mi>T</mi>
<mi>s</mi>
</msub>
<mo>&rsqb;</mo>
</mtd>
</mtr>
</mtable>
</mfenced>
<mo>+</mo>
<msup>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
</msup>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
</mrow>
Wherein, fDFor the Doppler frequency shift of input signal, fIFFor signal intermediate frequency, TsFor the cycle of BOC signals, n(l)(t) it is l sections
White noise；
It is described local BOC signals to be split as strange cell signal and even cell signal is specially：
Local PRN code modulating subcarrier obtains BOC signals, and local BOC signals are split as into strange cell signal CO(t) with even unit
Signal CE(t)；
Wherein, the mathematical modeling of local PRN code is：
<mrow>
<mi>P</mi>
<mi>R</mi>
<mi>N</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mi>C</mi>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein, TcIt is a spread-spectrum code chip cycle,It is T in the cycle to becRectangular pulse, CiIt is the symbol of i-th of chip, Ci∈
(-1,1)；
Locally BOC (n, n) subcarrier mathematical modeling is：
<mrow>
<mi>S</mi>
<mi>c</mi>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<mrow>
<mi>N</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</munderover>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein,It is T in the cycle to bescRectangular pulse, djIt is T each duration of subcarrier that={ 1, -1 }, which is,SCPulse
Symbol, and TSC=TC/ 2, N are the subcarrier pulse sums in a pseudorandom chip, using above-mentioned two mathematical modeling, are produced
Local BOC (n, n) sequence：
<mrow>
<msub>
<mi>S</mi>
<mrow>
<mi>B</mi>
<mi>O</mi>
<mi>C</mi>
</mrow>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<mrow>
<mi>N</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
</mrow>
The each chip of local BOC (n, n) sequence is divided into 2 equal portions, the code of each identical equal portions of pseudorandom chip is intercepted successively
Piece information, is split as strange cell signal CO(t) with even cell signal CE(t) it is as follows respectively：
<mrow>
<msub>
<mi>C</mi>
<mi>O</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<msub>
<mi>C</mi>
<mi>E</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mo>-</mo>
<mi>&infin;</mi>
</mrow>
<mi>&infin;</mi>
</munderover>
<msub>
<mi>C</mi>
<mi>i</mi>
</msub>
<msub>
<mi>d</mi>
<mi>j</mi>
</msub>
<msub>
<mi>P</mi>
<msub>
<mi>T</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
</msub>
<mrow>
<mo>(</mo>
<mi>t</mi>
<mo>-</mo>
<msub>
<mi>iT</mi>
<mi>C</mi>
</msub>
<mo>-</mo>
<msub>
<mi>jT</mi>
<mrow>
<mi>S</mi>
<mi>c</mi>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mo>;</mo>
</mrow>
It is described that strange cell signal and even cell signal and the unit correlation function of the BOC signals after carrier wave stripping are reconstructed,
The fuzzy detection limit of nothing for obtaining the intermediate frequency BOC signals of multistage predetermined length is specifically included：
To in-phase signal I(l)With orthogonal signalling Q(l)Complex signal I+jQ modulus；
By the output of modulus and strange cell signal CO(t) with even cell signal CE(t) it is multiplied respectively, it is integrated, respectively obtain l
The first integral result of sectionWith second integral result
L sections of first integral resultWith second integral resultThe 4th integral result is added to obtain according to reconfiguration ruleSubtract each other and obtain third integral resultAgain by third integral resultWith the 4th integral resultModulus is subtracted each other,
Obtain without fuzzy detection limit
Described to utilize noncoherent mode, the detection limit that the nothing to the intermediate frequency BOC signals of multistage predetermined length is obscured is recombinated,
Final detection limit is obtained to specifically include：
The detection limit obscured using noncoherent mode, the nothing to the intermediate frequency BOC signals of M sections of predetermined lengthsRecombinated, obtained
To final detection limit Sc, wherein,
The final detection limit of the basis judges whether accurately capture is specifically included BOC signals：
Judge final detection limit ScWhether it is more than default detection threshold value, if detection limit is more than detection threshold value, judges
BOC signals are accurately captured, if detection limit is less than detection threshold value, are reselected satellite number, are produced local BOC codes, then
The step of returning to the intermediate frequency BOC signals of the reception multistage predetermined length.
Priority Applications (1)
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| CN108089212A (en) * | 2018-01-23 | 2018-05-29 | 华东交通大学 | The BOC signal acquisition methods and system of reconstruct are split based on cross-correlation function |
| CN108196274A (en) * | 2018-01-24 | 2018-06-22 | 桂林电子科技大学 | Be applicable in BOC (n, n) signal without fuzziness catching method and device |
| CN108254767A (en) * | 2018-01-02 | 2018-07-06 | 桂林电子科技大学 | A kind of BOC signal acquisition methods and baseband synchronization receiver |
| CN108469623A (en) * | 2018-03-27 | 2018-08-31 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method for eliminating the modulated signal auto-correlation function sides BOC peak |
| CN108490462A (en) * | 2018-03-21 | 2018-09-04 | 桂林电子科技大学 | BOC based on correlation function reconstruct is without fuzzy tracking method |
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| CN111610539A (en) * | 2020-06-04 | 2020-09-01 | 桂林电子科技大学 | BOC (n, n) signal capturing method and device based on segmented reconstruction |
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| CN108089212A (en) * | 2018-01-23 | 2018-05-29 | 华东交通大学 | The BOC signal acquisition methods and system of reconstruct are split based on cross-correlation function |
| CN108196274A (en) * | 2018-01-24 | 2018-06-22 | 桂林电子科技大学 | Be applicable in BOC (n, n) signal without fuzziness catching method and device |
| CN108490462B (en) * | 2018-03-21 | 2021-02-19 | 桂林电子科技大学 | BOC (Bill of material) unambiguous tracking method based on correlation function reconstruction |
| CN108490462A (en) * | 2018-03-21 | 2018-09-04 | 桂林电子科技大学 | BOC based on correlation function reconstruct is without fuzzy tracking method |
| CN108469623A (en) * | 2018-03-27 | 2018-08-31 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method for eliminating the modulated signal auto-correlation function sides BOC peak |
| CN108562918A (en) * | 2018-04-26 | 2018-09-21 | 桂林电子科技大学 | Based on associated shift BOC (n, n) without fuzziness catching method and device |
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| CN108897009B (en) * | 2018-06-08 | 2022-06-28 | 桂林电子科技大学 | BOC navigation signal receiver and code tracking method thereof |
| CN111610539A (en) * | 2020-06-04 | 2020-09-01 | 桂林电子科技大学 | BOC (n, n) signal capturing method and device based on segmented reconstruction |
| CN112213748A (en) * | 2020-09-28 | 2021-01-12 | 四川九洲北斗导航与位置服务有限公司 | BOC signal capturing method, signal receiver and signal capturing system |
| CN113721272A (en) * | 2021-08-31 | 2021-11-30 | 广东工业大学 | Method for capturing Beidou satellite navigation B1C signal and related device thereof |
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