CN109239744A - A kind of quick anti-bit reversal quick capturing method based on complex signal phase - Google Patents

A kind of quick anti-bit reversal quick capturing method based on complex signal phase Download PDF

Info

Publication number
CN109239744A
CN109239744A CN201811221034.8A CN201811221034A CN109239744A CN 109239744 A CN109239744 A CN 109239744A CN 201811221034 A CN201811221034 A CN 201811221034A CN 109239744 A CN109239744 A CN 109239744A
Authority
CN
China
Prior art keywords
indicate
code phase
code
phase
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811221034.8A
Other languages
Chinese (zh)
Other versions
CN109239744B (en
Inventor
吴超
孙闽红
刘二小
滕旭阳
简志华
钟华
苏明坤
乔磊
仇兆炀
宋慧娜
汪立新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Dianzi University
Hangzhou Electronic Science and Technology University
Original Assignee
Hangzhou Electronic Science and Technology University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Electronic Science and Technology University filed Critical Hangzhou Electronic Science and Technology University
Priority to CN201811221034.8A priority Critical patent/CN109239744B/en
Publication of CN109239744A publication Critical patent/CN109239744A/en
Application granted granted Critical
Publication of CN109239744B publication Critical patent/CN109239744B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Present invention mainly discloses a kind of quick anti-bit reversal quick capturing method based on complex signal phase, by carrying out down-converted to reception signal, and to locally associated signal and receive signal progress piecemeal, the battle array for obtaining square is subjected to code phase search processing, obtain variable to be detected, it is detected again by coherent integration, obtain the coherent integration value of code phase search processing, it handles to obtain code phase processing variable to be detected to signal progress code phase is received, the bit data backward position of the estimation obtained, coherent integration detection is carried out again, finally obtain parameter code phase to be asked, the final capture parameter code phase and frequency for obtaining estimation, to realize the fast Acquisition of GNSS signal.The method of the present invention quickly can accurately estimate code phase, capture parameter Estimation under bit symbol Reversion to realize.

Description

A kind of quick anti-bit reversal quick capturing method based on complex signal phase
Technical field
The invention belongs to fields of communication technology, and in particular to a kind of quick anti-bit reversal based on complex signal phase is quick Catching method.
Background technique
With the progress of scientific and technological level, wireless communication technique and GPS (GPS) technology are more and more Every aspect applied to daily life starts.Wherein, Global Navigation Satellite System (Global Navigation Satellite System, is abbreviated as GNSS), positioning was seen using pseudorange, ephemeris, satellite launch time of one group of satellite etc. What measurement came, while must also be noted that user's clock deviation.Satellite navigation receiver captures and tracks the signal of multiple GNSS satellites, so The navigation data wherein modulated is demodulated afterwards.Satellite navigation receiver using ranging code calculate GNSS satellite and user it is opposite away from From resolving satellite position and time model using the almanac data in navigation data, and then calculate the position of user.Satellite is led Location technology of navigating at present substantially instead of ground based radio navigation, traditional geodesic survey and astronomical surveing navigator fix technology, And the completely new development of geodesic survey Yu navigator fix field is pushed.Therefore, GNSS system is national security and social economy's hair The infrastructure of exhibition.
During detection receives GNSS signal (i.e. satellite signal acquisition), parameter frequency to be estimated and code phase be will receive Data reversal influence (such as GPS L1C/A code receive signal, wherein L1 be carrier signal, C/A code be GPS satellite sending A kind of pseudo noise code for bigness scale away from capture GPS satellite), causing to detect peak value reduces, so that estimation parameter inaccuracy Influence detection speed.
In order to promote detection efficiency, the present age main catching method is used based on Fast Fourier Transform (FFT) method estimation capture ginseng Number.But acquisition speed needs to be further improved, and the randomness of signal data bit reversal to be detected, needing to formulate more has The harvesting policy of effect.In order to further enhance acquisition speed, acquisition algorithm complexity is reduced, needs further to study by bit Capture parameter fast Acquisition problem under data symbol Reversion.
Summary of the invention
The purpose of the present invention is to solve catching method speed is promoted under data bit Reversion, provide A kind of code phase and frequency for quickly and accurately estimating GNSS signal, to realize the quick anti-bit based on complex signal phase Invert quick capturing method.
In order to achieve the above object, adopted by the present invention the specific technical proposal is:
A kind of quick anti-bit reversal quick capturing method based on complex signal phase, comprising the following steps:
S1. down-converted is carried out to reception signal R (n), and to locally associated signal and receives signal progress piecemeal, obtained Matrix after to piecemealWithWherein, i indicates the i-th time of integration, and D indicates number Local pseudo noise code, ND indicate local pseudo noise code when no data bit influences when influencing according to bit, and M, 2N respectively indicate square The line number and columns of battle array；
S2. S1 is obtained into matrix and carries out code phase search processing, obtain variable to be detectedWithIt is detected again by coherent integration, obtains the coherent integration value of code phase search processingWherein i0For the bit data backward position of estimation,To estimate frequency, drFor code phase search processing estimation code phase parameter value, i The i-th time of integration is indicated, when D indicates that local pseudo noise code when data bit influence, ND indicate that no data bit influences Local pseudo noise code, fd,kIndicate search rate, dcIndicate the chip offset of search；
S3. code phase is carried out to reception signal to handle to obtain code phase processing variable to be detectedIt is obtained according to S1 Estimation bit data backward position i0, rightCoherent integration detection is carried out, finally obtains parameter code phase to be asked, most The capture parameter code phase and frequency for obtaining estimation eventually, to realize the fast Acquisition of GNSS signal.
Further, signal R (n) is received are as follows:
Wherein, q is the code phase for receiving signal, fdFor Doppler frequency, C () is pseudo noise code, and D () is modulation data, fsFor sample frequency, p (n) indicate real and imaginary parts obey mean value be 0, variance σ2Gaussian noise, n indicate sampled point, n =0,1 ...,
It receives signal R (n) and carries out down-converted, obtain down-conversion signal are as follows:
Wherein, down-conversion signal f (n) are as follows:
Wherein, fd,kFor search rate, fsFor sample frequency, n indicates sampled point.
Two kinds of locally associated signals are respectively as follows:
LD(n)=(- 1)k-1C(n)；
LND(n)=C (n)；
Wherein, n=iT+k0, T is PN code periodic sampling points, k0=0 ..., T-1, C () are pseudo noise code, and i indicates the The i time of integration, LD(n) and LND(n) local pseudo noise code when having respectively indicated data bit influence is influenced without data bit When local pseudo noise code；
Locally associated signal and down-conversion signal are carried out piecemeal, and (all letter characters etc. that following formula is related to need to solve Release, if before occur, also need to reinterpret herein):
Wherein, NL=2 (i-1) MN+dc, i=1 ..., Nc, NcFor coherent integration time, NR=(i-1) MN, M, 2N difference The line number and columns of representing matrix, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration.
Further, described that S1 is obtained matrix progress code phase search processing, the specific method is as follows:
Wherein, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration, and D indicates local when data bit influence Pseudo noise code, ND indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate the code of search Piece offset, works as dc- 1 < 0, dc- 1=dc-1+M；If dc+ 1 > M, dc+ 1=dc+ 1-M is detected by coherent integration:
Wherein, i1Indicate that the possible upturned position of data bit symbol, D indicate local pseudorandom when data bit influence Code, ND indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate the chip offset of search, drIndicate the code offset of code phase search processing prediction, i0Indicate prediction data bit reversal position, fd,k0For the signal of estimation Frequency.
Further, the phase estimator processing that signal carries out code phase processing is received for described pair, the specific method is as follows:
Wherein, D indicates that local pseudo noise code when data bit influence, ND indicate local pseudo- when no data bit influences Random code,I-th when expression does not have bit reversal in the phase estimator that code phase is handledNSecondary time of integration chip Offset is d2When receive signal integration value,I-th when expression has bit reversal in the phase estimator that code phase is handledN Secondary time of integration chip offset is d2When receive signal integration value, iNIt indicates i-th when no bit reversalNThe secondary time of integration, iD= i0+ 1 indicates i-th when data bit overturningDThe time of integration, M, N indicate the piecemeal square of the code phase prediction of code phase search processing Battle array parameter, i0Indicate prediction data bit reversal position, N=M2N2, M2、N2Indicate that the code phase of code phase processing predicts piecemeal square Battle array parameter, then carry out coherent integration detection:
Wherein, dr2Indicate that the code phase of code phase processing predicts parameter,When the code phase prediction of code phase processing Coherent integration after detection limit, D indicates that local pseudo noise code when data bit influence, ND indicate that no data bit influences When local pseudo noise code, i0Indicate prediction data bit reversal position, d2Indicate that chip is inclined when the code phase prediction of code phase processing It moves, it, can proper d according to PN code relevant nature2=dr2When obtain maximum value are as follows:
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts that parameter, M indicate the code phase of code phase search processing Predict matrix in block form parameter, M2、N2Indicate that the code phase of code phase processing predicts matrix in block form parameter.Enable X2(dr2) phase angle isThen
Wherein, cr2Indicate that the code phase of code phase processing predicts parameter, N2Indicate the code phase prediction point of code phase processing Block matrix parameter.Finally, received estimation code phase can be expressed as
Q=(cr2M2+dr2)M+dr；
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts parameter, drIndicate the code phase of code phase search processing Predict that parameter, M indicate that the code phase of code phase search processing predicts matrix in block form parameter, M2Indicate the code phase of code phase processing Predict matrix in block form parameter.
Above technical scheme is used, the present invention has the beneficial effects that bit symbol of the invention reversion can be Inside integrating range, transformation signal is based on using two steps and answers phase estimation signal code phase method for quick estimating, by code phase point Code phase is estimated for different segments.Code phase quickly can be accurately estimated based on above-mentioned Two-step estimation code phase method, thus It realizes and captures parameter Estimation under bit symbol Reversion.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the quick anti-bit reversal quick capturing method based on complex signal phase of the present invention.
Fig. 2 is art methods and the quick anti-bit reversal quick capturing method pair the present invention is based on complex signal phase Compare flow chart.
Fig. 3 is art methods and the present invention is based on the quick anti-bit reversal quick capturing methods of complex signal phase Richness plus calculation amount comparison diagram.
Fig. 4 is art methods and the present invention is based on the quick anti-bit reversal quick capturing methods of complex signal phase Multiply calculation amount comparison diagram again.
Specific embodiment
As shown in Figure 1, a kind of quick anti-bit reversal quick capturing method based on complex signal phase, which is characterized in that The following steps are included:
S1. down-converted is carried out to reception signal R (n), and to locally associated signal and receives signal progress piecemeal, obtained Matrix after to piecemealWithWherein, i indicates the i-th time of integration, and D indicates data Local pseudo noise code, ND indicate local pseudo noise code when no data bit influences when bit influences, and M, 2N respectively indicate matrix Line number and columns.
It receives signal R (n) are as follows:
Wherein, q is the code phase for receiving signal, fdFor Doppler frequency, C () is pseudo noise code, and D () is modulation data, fsFor sample frequency, p (n) indicate real and imaginary parts obey mean value be 0, variance σ2Gaussian noise, n indicate sampled point, n =0,1 ...,
It receives signal R (n) and carries out down-converted, obtain down-conversion signal are as follows:
Wherein, down-conversion signal f (n) are as follows:
Wherein, fd,kFor search rate, fsFor sample frequency, n indicates sampled point.
Two kinds of locally associated signals are respectively as follows:
LD(n)=(- 1)k-1C(n)；
LND(n)=C (n)；
Wherein, n=iT+k0, T is PN code periodic sampling points, k0=0 ..., T-1, C () are pseudo noise code, and i indicates the The i time of integration, LD(n) and LND(n) local pseudo noise code when having respectively indicated data bit influence is influenced without data bit When local pseudo noise code；
Locally associated signal and down-conversion signal are subjected to piecemeal:
Wherein, NL=2 (i-1) MN+dc, i=1 ..., Nc, NcFor coherent integration time, NR=(i-1) MN, M, 2N difference The line number and columns of representing matrix, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration.
S2. S1 is obtained into matrix and carries out code phase search processing, obtain variable to be detectedWithIt is detected again by coherent integration, obtains the coherent integration value of code phase search processingWherein i0For the bit data backward position of estimation,To estimate frequency, drFor code phase search processing estimation code phase parameter value, i The i-th time of integration is indicated, when D indicates that local pseudo noise code when data bit influence, ND indicate that no data bit influences Local pseudo noise code, fd,kIndicate search rate, dcIndicate the chip offset of search.
Described that S1 is obtained matrix progress code phase search processing, the specific method is as follows:
Wherein, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration, and D indicates local when data bit influence Pseudo noise code, ND indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate the code of search Piece offset, works as dc- 1 < 0, dc- 1=dc-1+M；If dc+ 1 > M, dc+ 1=dc+ 1-M is detected by coherent integration:
Wherein, i1Indicate that the possible upturned position of data bit symbol, D indicate local pseudorandom when data bit influence Code, ND indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate the chip offset of search, drIndicate the code offset of code phase search processing prediction, i0Indicate prediction data bit reversal position, fd,k0For the signal of estimation Frequency.
S3. code phase is carried out to reception signal to handle to obtain code phase processing variable to be detectedIt is obtained according to S1 Estimation bit data backward position i0, rightCoherent integration detection is carried out, finally obtains parameter code phase to be asked, most The capture parameter code phase and frequency for obtaining estimation eventually, to realize the fast Acquisition of GNSS signal.
Described pair receives the phase estimator processing that signal carries out code phase processing, and the specific method is as follows:
Wherein, D indicates that local pseudo noise code when data bit influence, ND indicate local pseudo- when no data bit influences Random code,I-th when expression does not have bit reversal in the phase estimator that code phase is handledNSecondary time of integration chip Offset is d2When receive signal integration value,I-th when expression has bit reversal in the phase estimator that code phase is handledN Secondary time of integration chip offset is d2When receive signal integration value, iNIt indicates i-th when no bit reversalNThe secondary time of integration, iD= i0+ 1 indicates i-th when data bit overturningDThe time of integration, M, N indicate the piecemeal square of the code phase prediction of code phase search processing Battle array parameter, i0Indicate prediction data bit reversal position, N=M2N2, M2、N2Indicate that the code phase of code phase processing predicts piecemeal square Battle array parameter, then carry out coherent integration detection:
Wherein, dr2Indicate that the code phase of code phase processing predicts parameter,When the code phase prediction of code phase processing Coherent integration after detection limit, D indicates that local pseudo noise code when data bit influence, ND indicate that no data bit influences When local pseudo noise code, i0Indicate prediction data bit reversal position, d2Indicate that chip is inclined when the code phase prediction of code phase processing It moves, it, can proper d according to PN code relevant nature2=dr2When obtain maximum value are as follows:
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts that parameter, M indicate the code phase of code phase search processing Predict matrix in block form parameter, M2、N2Indicate that the code phase of code phase processing predicts matrix in block form parameter.Enable X2(dr2) phase angle isThen
Wherein, cr2Indicate that the code phase of code phase processing predicts parameter, N2Indicate the code phase prediction point of code phase processing Block matrix parameter.Finally, received estimation code phase can be expressed as
Q=(cr2M2+dr2)M+dr；
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts parameter, drIndicate the code phase of code phase search processing Predict that parameter, M indicate that the code phase of code phase search processing predicts matrix in block form parameter, M2Indicate the code phase of code phase processing Predict matrix in block form parameter.
As shown in Figure 2, wherein C (n) is local signal, and NF is sampling number in the unit time of integration.R0It (m) is not have Data modulate a PN-code capture and obtain integrated value, R1(m) integrated value is obtained there are data to modulate a PN-code capture, m is code Piece offset.Assuming that it is R that i-th of PN-code capture, which does not have integrated value when data modulation,0, i(m), it is assumed that i-th of PN-code capture does not count It is R according to integrated value when modulation1, i(m), then upper figure accumulates result are as follows:
Wherein K is integration time, k=1 ..., K.According to above-mentioned accumulation peak value it can be concluded that maximum value, maximum value correspondence code Piece offset is received signal code phase estimation value.
Table 1 is flowed out according to the prior art and proposition method, obtains art methods and the present invention is based on complex signal phases Being added with calculation amount and multiplying calculation amount again for the quick anti-bit reversal quick capturing method of position compares:
Table 1
Wherein NcIndicate the time of integration, NFSampling number in the unit time of integration.Wherein M, N, M2And N2Such as formula step S2 And the parameter that S3 is indicated, indicate the first and second step piecemeal parameter.
Fig. 3 is art methods and the quick anti-bit reversal quick capturing method the present invention is based on complex signal phase Richness plus calculation amount comparison diagram.
Fig. 4 is art methods and the quick anti-bit reversal quick capturing method the present invention is based on complex signal phase Richness multiplies calculation amount comparison diagram.
From Fig. 3,4, we can be found that the method for the present invention has and use estimated code phase transition to estimation complex signal phase On than it is existing fewer answering consumed based on Fast Fourier Transform (FFT) multiply calculation amount and be added with calculation amount, it is possible to more quickly Estimation capture parameter, achievees the purpose that fast Acquisition.
Wherein, Nc=1~11ms, NF=1023, M=N=32, M2=4, N2=8, P1=P2=8.From the graph it can be seen that It is proposed method can greatly reduce calculation amount than contemporary methodologies.
Wherein, it is calculating quickly fastly for discrete fourier transform (DFT) that FFT, which is FFT (Fast Fourier Transformation), Method.
Pseudo noise code herein refers to that (Pseudo-Noise, PN code) has the 0 of the automatic correlative property similar with white noise The coded sequence constituted with 1.
It should be appreciated by those skilled in the art, the principle of a specific embodiment of the invention for explaining only the invention, And it is not intended to limit the present invention.It is all according to the present invention in the equivalent change or modification made of design spirit, this should all be fallen into The protection scope of invention.

Claims (4)

1. a kind of quick anti-bit reversal quick capturing method based on complex signal phase, which comprises the following steps:
S1. down-converted is carried out to reception signal R (n), and to locally associated signal and receives signal progress piecemeal, divided Matrix after blockWithWherein, i indicates the i-th time of integration, and D indicates data bit Local pseudo noise code, ND indicate local pseudo noise code when no data bit influences when influence, and M, 2N respectively indicate the row of matrix Several and columns；
S2. S1 is obtained into matrix and carries out code phase search processing, obtain variable to be detectedWithAgain It is detected by coherent integration, obtains the coherent integration value of code phase search processingWherein i0For the bit of estimation Data reversal position,To estimate frequency, drFor code phase search processing estimation code phase parameter value, i indicates i-th integral Time, D indicate that local pseudo noise code when data bit influence, ND indicate local pseudo noise code when no data bit influences, fd,kIndicate search rate, dcIndicate the chip offset of search；
S3. code phase is carried out to reception signal to handle to obtain code phase processing variable to be detectedEstimated according to what S1 was obtained The bit data backward position i of calculation0, rightCoherent integration detection is carried out, parameter code phase to be asked is finally obtained, finally obtains The capture parameter code phase and frequency that must be estimated, to realize the fast Acquisition of GNSS signal.
2. a kind of quick anti-bit reversal quick capturing method based on complex signal phase as described in claim 1, feature It is, receives signal R (n) are as follows:
Wherein, q is the code phase for receiving signal, fdFor Doppler frequency, C () is pseudo noise code, and D () is modulation data, fsFor Sample frequency, p (n) indicate real and imaginary parts obey mean value be 0, variance σ2Gaussian noise, n indicate sampled point, n=0, 1,…,
It receives signal R (n) and carries out down-converted, obtain down-conversion signal are as follows:
Wherein, down-conversion signal f (n) are as follows:
Wherein, fd,kFor search rate, fsFor sample frequency, n indicates sampled point,
Two kinds of locally associated signals are respectively as follows:
LD(n)=(- 1)k-1C(n)；
LND(n)=C (n)；
Wherein, n=iT+k0, T is PN code periodic sampling points, k0=0 ..., T-1, C () are pseudo noise code, and i indicates i-th product Between timesharing, LD(n) and LND(n) local pseudo noise code when having respectively indicated data bit influence, sheet when being influenced without data bit Ground pseudo noise code；
Locally associated signal and down-conversion signal are subjected to piecemeal:
Wherein, NL=2 (i-1) MN+dc, i=1 ..., Nc, NcFor coherent integration time, NR=(i-1) MN, M, 2N are respectively indicated The line number and columns of matrix, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration.
3. a kind of quick anti-bit reversal quick capturing method based on complex signal phase as described in claim 1, feature It is:
Described that S1 is obtained matrix progress code phase search processing, the specific method is as follows:
Wherein, M, N indicate that matrix in block form parameter, i indicate the i-th time of integration, when D indicates data bit influence local puppet with Machine code, ND indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate that the chip of search is inclined It moves, works as dc- 1 < 0, dc- 1=dc-1+M；If dc+ 1 > M, dc+ 1=dc+ 1-M is detected by coherent integration:
Wherein, i1Indicate that the possible upturned position of data bit symbol, D indicate local pseudo noise code, ND when data bit influence Indicate local pseudo noise code, f when no data bit influencesd,kIndicate search rate, dcIndicate the chip offset of search, drIt indicates The code offset of code phase search processing prediction, i0Indicate prediction data bit reversal position, fd,k0For the signal frequency of estimation.
4. a kind of quick anti-bit reversal quick capturing method based on complex signal phase as described in claim 1, feature It is:
Described pair receives the phase estimator processing that signal carries out code phase processing, and the specific method is as follows:
Wherein, D indicates that local pseudo noise code when data bit influence, ND indicate local pseudorandom when no data bit influences Code,I-th when expression does not have bit reversal in the phase estimator that code phase is handledNSecondary time of integration chip offset For d2When receive signal integration value,I-th when expression has bit reversal in the phase estimator that code phase is handledNSecondary product Chip offset is d between timesharing2When receive signal integration value, iNIt indicates i-th when no bit reversalNThe secondary time of integration, iD=i0+1 It indicates i-th when data bit overturningDThe time of integration, M, N indicate the matrix in block form of the code phase prediction of code phase search processing Parameter, i0Indicate prediction data bit reversal position, N=M2N2, M2、N2Indicate that the code phase of code phase processing predicts matrix in block form Parameter,
Coherent integration detection is carried out again:
Wherein, dr2Indicate that the code phase of code phase processing predicts parameter,Phase when the code phase prediction of code phase processing Detection limit after dry integral, D indicate that local pseudo noise code when data bit influence, ND indicate sheet when no data bit influences Ground pseudo noise code, i0Indicate prediction data bit reversal position, d2Indicate chip offset when the code phase prediction of code phase processing, It, can proper d according to PN code relevant nature2=dr2When obtain maximum value are as follows:
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts that parameter, M indicate the code phase prediction of code phase search processing Matrix in block form parameter, M2、N2Indicate that the code phase of code phase processing predicts matrix in block form parameter.Enable X2(dr2) phase angle isThen
Wherein, cr2Indicate that the code phase of code phase processing predicts parameter, N2Indicate that the code phase of code phase processing predicts piecemeal square Battle array parameter.Finally, received estimation code phase can be expressed as
Q=(cr2M2+dr2)M+dr；
Wherein, cr2、dr2Indicate that the code phase of code phase processing predicts parameter, drIndicate the code phase prediction of code phase search processing Parameter, M indicate that the code phase of code phase search processing predicts matrix in block form parameter, M2Indicate the code phase prediction of code phase processing Matrix in block form parameter.
CN201811221034.8A 2018-10-19 2018-10-19 Rapid anti-bit-reversal rapid capturing method based on complex signal phase Active CN109239744B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811221034.8A CN109239744B (en) 2018-10-19 2018-10-19 Rapid anti-bit-reversal rapid capturing method based on complex signal phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811221034.8A CN109239744B (en) 2018-10-19 2018-10-19 Rapid anti-bit-reversal rapid capturing method based on complex signal phase

Publications (2)

Publication Number Publication Date
CN109239744A true CN109239744A (en) 2019-01-18
CN109239744B CN109239744B (en) 2020-10-09

Family

ID=65080672

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811221034.8A Active CN109239744B (en) 2018-10-19 2018-10-19 Rapid anti-bit-reversal rapid capturing method based on complex signal phase

Country Status (1)

Country Link
CN (1) CN109239744B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008107160A (en) * 2006-10-24 2008-05-08 Toyota Motor Corp Satellite radio wave receiver for mobile unit
JP2011203234A (en) * 2010-10-19 2011-10-13 Seiko Epson Corp Signal acquisition method, signal acquisition apparatus and electronic device
CN102608626A (en) * 2012-03-09 2012-07-25 暨南大学 High-sensitivity satellite navigation signal capturing method and system
CN106093981A (en) * 2016-06-06 2016-11-09 电子科技大学 Circuit is captured based on the GPS optimizing parallel code phase search
CN107247276A (en) * 2017-07-05 2017-10-13 西安电子科技大学 Weak signal catching method based on overlapping polylith zero padding algorithm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008107160A (en) * 2006-10-24 2008-05-08 Toyota Motor Corp Satellite radio wave receiver for mobile unit
JP2011203234A (en) * 2010-10-19 2011-10-13 Seiko Epson Corp Signal acquisition method, signal acquisition apparatus and electronic device
CN102608626A (en) * 2012-03-09 2012-07-25 暨南大学 High-sensitivity satellite navigation signal capturing method and system
CN106093981A (en) * 2016-06-06 2016-11-09 电子科技大学 Circuit is captured based on the GPS optimizing parallel code phase search
CN107247276A (en) * 2017-07-05 2017-10-13 西安电子科技大学 Weak signal catching method based on overlapping polylith zero padding algorithm

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ZHANG XIANG-LI ET AL.: "Semi-bit Frequency Compensation Differential Combining Post-Correlation Processing for GNSS Weak Signal Environment", 《2017 2ND ASIA-PACIFIC CONFERENCE ON INTELLIGENT ROBOT SYSTEMS (ACIRS)》 *
李卫斌等: "微弱 GPS 信号的翻转位预测捕获算法", 《计算机应用》 *

Also Published As

Publication number Publication date
CN109239744B (en) 2020-10-09

Similar Documents

Publication Publication Date Title
CN104536016B (en) GNSS new-system signal capturing device and method
CN101099089B (en) Method and apparatus for increasing coherent integration length while receiving positioning signal
Ma et al. Implementation of a software GPS receiver
CN101464508B (en) Method for capturing C/A code signal of GPS
CN102435999B (en) Baseband module of GPS (global positioning system) receiver and GPS signal acquiring and tracing method
CN102759739A (en) Rapid associated acquisition device and method thereof
US9270323B2 (en) Wireless communication synchronization system
CN105553506B (en) A kind of quick capturing method and device of long code spread-spectrum signal
CN103176189A (en) Near-far effect suppressor for high-flexibility satellite navigation receiver and near-far effect suppressing method thereof
CN102854516A (en) Method and system for estimating carrier-to-noise ratio in GNSS (Global Navigation Satellite System) receiver
CN100501441C (en) Method and system for locating a GPS correlated peak signal
CN102565825B (en) Received signal strength fiduciary level decision maker, method and code phase error calculation method
CN103809192A (en) Dynamic correction algorithm of GNSS receiver
CN104215979A (en) Large frequency shift GNSS signal capture method based on segmented correlative combination and FFT computation
CN109581434B (en) B2a signal capturing method and device
Tamazin et al. Robust fine acquisition algorithm for GPS receiver with limited resources
CN103941269A (en) PN code capturing method used for satellite navigation system
CN2854622Y (en) System for GPS position at small signal environment
US8494094B2 (en) Demodulation of data collected prior to bit edge detection
CN103207400A (en) Method Of Capturing Satellite Signal And Device For Capturing Satellite Signal
US20110050496A1 (en) Energy Domain Based Peak Reconstruction Methods And Apparatuses
CN102590834A (en) Method of determining adequacy and adequacy determining device
CN1690726B (en) Down-scaling apparatus and method, GPS synchronization acquisition method, and GPS receiver
CN109239744A (en) A kind of quick anti-bit reversal quick capturing method based on complex signal phase
CN102193096A (en) Signal acquisition method and signal acquisition apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant