CN109088838A - Pseudo-code-Doppler's quick capturing method of direct expansion dpsk signal under a kind of high dynamic - Google Patents
Pseudo-code-Doppler's quick capturing method of direct expansion dpsk signal under a kind of high dynamic Download PDFInfo
- Publication number
- CN109088838A CN109088838A CN201811046970.XA CN201811046970A CN109088838A CN 109088838 A CN109088838 A CN 109088838A CN 201811046970 A CN201811046970 A CN 201811046970A CN 109088838 A CN109088838 A CN 109088838A
- Authority
- CN
- China
- Prior art keywords
- code
- pseudo
- doppler
- direct expansion
- dpsk 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
Abstract
The invention discloses a kind of pseudo-code of direct expansion dpsk signal under high dynamic-Doppler's quick capturing methods, comprising the following steps: carries out down-converted to the intermediate frequency direct expansion dpsk signal received by carrier wave first；Doppler shift is captured using nonlinear transformation joint FFT later；Doppler shift value is recycled to be modified carrier wave；Down-converted is carried out to direct expansion dpsk signal with revised carrier wave later；Finally by the search that code phase compression correlator carries out the intermediate frequency direct expansion dpsk signal after multichannel continuous phase local pseudo-code and Doppler effect correction, pseudo-code estimated value is obtained.The present invention can be realized the capture of direct expansion dpsk signal under high dynamic, complete the Combined estimator of pseudo-code phase and Doppler shift, with lesser Doppler shift evaluated error performance, and there is good pseudo-code phase acquisition performance, capture time is short, to guarantee that receiving signal has obtained preferably slightly synchronizing before entering signal tracks processing module, complexity is lower, has stronger practical value.
Description
Technical field
The invention belongs to direct sequence signal receiver processing technology field, direct expansion dpsk signal under especially a kind of high dynamic
Pseudo-code-Doppler's quick capturing method.
Background technique
The final goal of direct expansion dpsk signal receiver processing is that despread-and-demodulation goes out to send data, pseudo-code phase and carrier frequency
The capture of rate is the precondition of correct despread-and-demodulation, and previous receiver is become under the direct expansion dpsk signal received mostly
Frequency carries out pseudo-code phase capture and carrier doppler capturing frequency deviation respectively after handling.Traditional method for acquiring pseudo code has sliding related
Method and matching matrix, there are contradictions between acquisition speed and implementation complexity.Simultaneously under high dynamic environment, receiver with
Usually there is very high radial velocity between transmitter, this makes reception signal, and there are tens the kHz even Doppler of several hundred kHz
Frequency displacement has a huge impact the capture and tracking of spreading code.It then becomes necessary to carrier Doppler frequency carry out capture and
Compensation, this is also referred to as carrier wave intercepting and capturing.Then the capture of pseudo-code signal, which becomes, catches pseudo-code phase and carrier doppler frequency deviation
It obtains, this capture time for just needing to grow very much.So being accurately rapidly performed by under high dynamic environment and being captured as technology hardly possible
Point.
G.J.R.Povey et al. first proposed based on numerical portion matched filter and FFT combination algorithm (PMF-
FFT Capturing Models), although this method alleviates influence of the Doppler shift to detection threshold to a certain extent, and
The two dimension capture of pseudo-code phase and carrier wave frequency deviation is realized, but the capture range of this method Doppler shift is smaller, height is dynamic
It is still not applicable under state environment.Thus, how accurately and rapidly to be completed under high dynamic environment spread-spectrum signal pseudo-code phase and
Doppler shift capture, becomes the key technology of direct expansion dpsk signal all-digital receiver.And there is no in the prior art can be very
It adapts to high dynamic environment well and reaches the method for more excellent capture effect, so that the performance of direct expansion dpsk signal all-digital receiver is not
It is good.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of to realize quickly catching for direct expansion dpsk signal under high dynamic
The method obtained completes the Combined estimator of pseudo-code phase and Doppler shift.
The technical solution for realizing the aim of the invention is as follows: pseudo-code-Doppler of direct expansion dpsk signal under a kind of high dynamic
Quick capturing method, comprising the following steps:
Step 1 passes through carrier wave fcDown-converted is carried out to the intermediate frequency direct expansion dpsk signal received；
Step 2 is chosen nonlinear transformation coefficient L and FFT points, and is become using nonlinear transformation joint FFT is lower to step 1
Dpsk signal after frequency carries out Doppler shift estimation, obtains Doppler shift value
Step 3 utilizes Doppler shift valueTo carrier wave fcIt is modified, obtains revised carrier wave fc'；
Step 4 passes through revised carrier wave fc' down-converted is carried out to the intermediate frequency direct expansion dpsk signal received, it obtains
Obtain the compensated intermediate frequency direct expansion dpsk signal of Doppler；
Step 5 carries out the intermediate frequency direct expansion dpsk signal after multichannel continuous phase local pseudo-code and step 4 Doppler effect correction
Search obtains pseudo-code estimated valueTo complete pseudo-code-Doppler's fast Acquisition.
Compared with prior art, the present invention its remarkable advantage are as follows: 1) the method for the present invention is simple, it is easy to accomplish, it may be implemented
The fast Acquisition of direct expansion dpsk signal under high dynamic completes the Combined estimator of pseudo-code phase and Doppler shift；2) present invention is logical
Nonlinear transformation joint FFT method estimating Doppler frequency deviation is crossed, there is lesser Doppler shift evaluated error performance；3) this hair
It is bright that fast search is carried out to code phase by code phase compressor, reduce total search number, greatly reduces capture time, energy
It is preferably thick synchronous to guarantee that reception signal has just obtained before entering signal tracking (essence is synchronous) processing module.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is pseudo-code-Doppler's quick capturing method flow chart of direct expansion dpsk signal under high dynamic of the invention.
Fig. 2 is that the present invention is based on the functional block diagrams of nonlinear transformation-FFT Nonlinear Transformation in Frequency Offset Estimation.
Fig. 3 is that code phase of the present invention compresses relevant functional block diagram.
Fig. 4 is the 3-D graphic schematic diagram that pseudo-code of the embodiment of the present invention-Doppler captures result.
Fig. 5 be the embodiment of the present invention detection probability and false-alarm probability with input signal-to-noise ratio change curve schematic diagram.
Specific embodiment
In conjunction with Fig. 1, pseudo-code-Doppler's quick capturing method of dpsk signal under a kind of high dynamic of the present invention, including it is following
Step:
Step 1 passes through carrier wave fcDown-converted carried out to the intermediate frequency direct expansion dpsk signal that receives, after down-converted
Dpsk signal are as follows:
In formula, ρ (n)=∑ γkR1(-iTc),For the signal after spread spectrum, N is spreading code period, dkTo pass
Transmission of data, ckFor spreading code, dk/NTo press spreading code periodic sampling to transmission data, | * |NFor the modulo-N arithmetic of " * "；R1(*) is to hold
The continuous time is TcBase band pulse shape；The centre frequency of BPSK modulator is f1=fc-1/(4Tc), fcFor carrier frequency, TcFor
Spreading code chip width；τ is pseudo- code error；fdFor Doppler shift；For initial phase, it will be assumed that be 0；RcFor spreading code speed
Rate；N (n) is white Gaussian noise.
Step 2 chooses nonlinear transformation coefficient L and FFT points, and using nonlinear transformation and FFT to step 1 down coversion
Dpsk signal afterwards carries out Doppler shift estimation, obtains Doppler shift valueBased on nonlinear transformation-FFT Doppler
The principle of offset estimation is as shown in Fig. 2, core concept is to carry out Doppler shift estimation using nonlinear transformation joint FFT.
After carrying out L nonlinear transformation to the direct expansion dpsk signal y (n) after down coversion, available y'(n) are as follows:
In formula, L is nonlinear transformation coefficient, N'(n) be
In formula, NL-1,…N0For the coefficient of each secondary item of noise expansion.
Known ρ (n) ≈ ± 1, therefore when L is taken as even number, spread spectrum data do not influence the estimation of carrier wave frequency deviation, and frequency deviation value meeting
Become original L times.To y'(n) FFT operation is carried out, it will appear peak value on frequency spectrum, and the position of peak value is that Doppler estimates
Evaluation
In formula, RcFor spread-spectrum code rate；KmaxFor spectrum peak position；NFFTFor FFT points；L is nonlinear transformation
Coefficient.
By the minimal error of formula (4) available offset estimation are as follows:
Frequency offset estimation range are as follows:
Preferably, nonlinear transformation coefficient L takes 4, FFT points to take 2048.
Step 3 utilizes Doppler shift valueTo carrier wave fcIt is modified, obtains revised carrier wave fc', formula used
Are as follows:
Step 4 passes through revised carrier wave fc' down-converted is carried out to the intermediate frequency direct expansion dpsk signal received, it obtains
Obtain the compensated intermediate frequency direct expansion dpsk signal of Doppler.
Step 5, access code phase-compression COEFFICIENT Kl, correlator is compressed to multichannel continuous phase local pseudo-code by code phase
It is scanned for the intermediate frequency direct expansion dpsk signal after step 4 Doppler effect correction, obtains pseudo-code estimated valueTo complete pseudo-code-
Doppler's fast Acquisition.
When carrying out code phase search, will also occur correlation peak when pseudo-code phase is near received signal code phase, because
This can compress adjacent unit, reduce total search unit number, substantially reduce the thick capture time of signal.
It is as shown in Figure 3 that code phase compresses relevant principle.If the pseudo-code phase compressed coefficient is Kl, then locally compressed code is Kl
Road differs the sub- pseudo-code sequence summation an of code phase each other are as follows:
In formula, c (*) is local pseudo code sequence.Enable locally compressed code phaseI=0,1 ... SN/Kl- 1, wherein
N is PN code length, and total number of phases is SN, i.e., pseudo-code phase is divided into SN/KlA section, is denoted as H.The then resident sheet of i-th
Ground compressed code are as follows:
δ τ is enabled to indicate to receive the difference of code phase and locally compressed code phase: δ τ=τ-τc.If receiving code phaseThen thinkFor optimal compression code phase, it is denoted asτ withDifference be denoted asOptimal compression
Phase intervalIt is denoted as H1, other compression sections are denoted as H0.If taking correlation intergal length is entire PN-code capture
SN, locally compressed code phase areWhen, while ignoring initial phaseAnd noise contribution n (i), compression correlation function can be with table
It is shown as:
When its auto-correlation function may be expressed as: pseudo-code after over-sampling
Such as when S=2, only there are correlations on these three code phases.For formula (11), only whenWhen
There are significant correlation energy values, therefore can be by the value interval of m from [0 Kc- 1] it narrows down to
Following analysis considers a kind of optimal cases, and all 2S-1 there are the phase points of correlation to be entirely located in optimal compression code phase area
BetweenIt is interior, i.e.,AndAt this point, compression correlationIt can indicate
It is as follows:
Section 2 in above formula braces is approximately zero after integrating in a PN-code capture due to the presence of phase difference,
Formula (12) can abbreviation are as follows:
By above formula (13b) as can be seen that fdInfluence to correlation is mainly reflected in ∑ exp (the j2 π f of formula (13a)dn/
Rc), show as Sinc functional form, correlation bandwidth Bc=2Rc/L.Work as fdBeyond BcWhen can cause serious decline, influence correct
Capture.
Preferably, code phase compressed coefficient KlChoose 4.
Below with reference to embodiment, present invention is further described in detail.
Embodiment
Simulation parameter is arranged in the present embodiment are as follows: spreading code uses Gold sequence, code length N=1023；Sample frequency fs=
245.52MHz；Carrier frequency fc=76.725MHz, spread-spectrum code rate Rc=20.46Mchip/s, data rate Rb=
20kbps.Code phase error τ=200, Doppler shift fd=201250Hz, nonlinear transformation coefficient L=4, FFT points are
2048 points, pseudo-code compressed coefficient Kl=4, Signal to Noise Ratio (SNR)=- 10dB.
In conjunction with Fig. 4 three-dimensional figure it is found that simulation result pseudo-code differ estimated value1chip is differed with preset value；
Doppler shift is estimated as250Hz is differed with preset value, is in teachings, calculation is thus demonstrated
Method has preferable accuracy.
Fig. 5 is Signal to Noise Ratio (SNR) uniform value, Doppler shift f in [- 30dB, 0dB] ranged=80kHz, false-alarm are general
Rate PfThe detection probability of 5000 Monte Carlo simulations and the change curve of false-alarm probability are carried out when=0.001.In Fig. 5, due to
CFAR detection thresholding is set, and the constant approach of false-alarm probability is 0；And when SNR >=-21dB, thus detection probability 1 proves to calculate
Method has preferable working performance under low signal-to-noise ratio environment.
The method of the present invention is simple, it is easy to accomplish, fast search is carried out to code phase by code phase compressor, is reduced total
Search number, greatly reduce capture time, and have that algorithm complexity is small, be completed at the same time pseudo-code phase and Doppler shift is caught
Obtain, evaluated error is small, expands the advantages such as processing gain, suitable for the application environment of high dynamic, there is stronger practical value.
Claims (7)
1. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under a kind of high dynamic, which is characterized in that including following
Step:
Step 1 passes through carrier wave fcDown-converted is carried out to the intermediate frequency direct expansion dpsk signal received；
After step 2 chooses nonlinear transformation coefficient L and FFT points, and utilization nonlinear transformation joint FFT is to step 1 down coversion
Dpsk signal carry out Doppler shift estimation, obtain Doppler shift value
Step 3 utilizes Doppler shift valueTo carrier wave fcIt is modified, obtains revised carrier wave fc'；
Step 4 passes through revised carrier wave fc' down-converted is carried out to the intermediate frequency direct expansion dpsk signal received, it how general obtains
Strangle compensated intermediate frequency direct expansion dpsk signal；
Step 5 searches multichannel continuous phase local pseudo-code and the intermediate frequency direct expansion dpsk signal after step 4 Doppler effect correction
Rope obtains pseudo-code estimated valueTo complete pseudo-code-Doppler's fast Acquisition.
2. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 1, special
Sign is, the dpsk signal in step 1 after down-converted are as follows:
In formula, ρ (n)=∑ γkR1(-iTc),For the signal after spread spectrum, N is spreading code period, dkTo transmit number
According to ckFor spreading code, dk/NTo press spreading code periodic sampling to transmission data, | * |NFor the modulo-N arithmetic of " * "；R1(*) is when continuing
Between be TcBase band pulse shape；The centre frequency of BPSK modulator is f1=fc-1/(4Tc), fcFor carrier frequency, TcFor spread spectrum
Code chip width；τ is pseudo- code error；fdFor Doppler shift；For initial phase；RcFor spread-spectrum code rate；N (n) is white Gaussian
Noise.
3. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 2, special
Sign is, carries out Doppler shift to the dpsk signal after step 1 down coversion using nonlinear transformation joint FFT described in step 2
Estimation obtains Doppler shift valueFormula used are as follows:
In formula, RcFor spread-spectrum code rate；KmaxFor spectrum peak position；NFFTFor FFT points；L is nonlinear transformation coefficient；
It y'(n is) the direct expansion dpsk signal after L nonlinear transformation.
4. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 1, special
Sign is that the L of nonlinear transformation coefficient described in step 2 takes 4, FFT points to take 2048.
5. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 1, special
Sign is, Doppler shift value is utilized described in step 3To carrier wave fcIt is modified, obtains revised carrier wave fc', public affairs used
Formula are as follows:
6. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 1, special
Sign is, described in step 5 to the intermediate frequency direct expansion dpsk signal after multichannel continuous phase local pseudo-code and step 4 Doppler effect correction into
Row search, obtains pseudo-code estimated valueSpecifically:
Access code phase-compression COEFFICIENT Kl, it is how general to multichannel continuous phase local pseudo-code and step 4 that correlator is compressed by code phase
It strangles compensated intermediate frequency direct expansion dpsk signal to scan for, obtains pseudo-code estimated value
7. the pseudo-code of direct expansion dpsk signal-Doppler's quick capturing method under high dynamic according to claim 6, special
Sign is, the code phase compressed coefficient KlChoose 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046970.XA CN109088838B (en) | 2018-09-08 | 2018-09-08 | Pseudo code-Doppler fast capturing method of direct sequence spread spectrum DPSK signal under high dynamic condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046970.XA CN109088838B (en) | 2018-09-08 | 2018-09-08 | Pseudo code-Doppler fast capturing method of direct sequence spread spectrum DPSK signal under high dynamic condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109088838A true CN109088838A (en) | 2018-12-25 |
| CN109088838B CN109088838B (en) | 2020-11-06 |
Family
ID=64841179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811046970.XA Active CN109088838B (en) | 2018-09-08 | 2018-09-08 | Pseudo code-Doppler fast capturing method of direct sequence spread spectrum DPSK signal under high dynamic condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109088838B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581435A (en) * | 2018-12-28 | 2019-04-05 | 合肥工业大学 | GNSS signal two-step captures data symbol overturning removing method and device |
| CN111082835A (en) * | 2019-12-03 | 2020-04-28 | 南京理工大学 | Pseudo code and Doppler combined capturing method of direct sequence spread spectrum signal under high dynamic condition |
| CN112910497A (en) * | 2021-01-18 | 2021-06-04 | 清华大学 | Quick code capture method for short-spreading-ratio satellite communication system |
| CN113904905A (en) * | 2021-09-22 | 2022-01-07 | 湖南艾科诺维科技有限公司 | Capturing device and method for dynamic direct sequence spread spectrum keying (GMSK) signal |
| CN113972929A (en) * | 2021-10-26 | 2022-01-25 | 上海无线电设备研究所 | Method for capturing spread spectrum signal under high dynamic Doppler |
| CN115250134A (en) * | 2021-12-28 | 2022-10-28 | 中科芯集成电路有限公司 | PMF-FFT (pulse-modulated fast Fourier transform) capturing method under large Doppler frequency |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060205437A1 (en) * | 2005-03-08 | 2006-09-14 | Samsung Electronics Co., Ltd. | Apparatus and method for channel estimation in an SDMA-OFDM system |
| KR20100107716A (en) * | 2009-03-26 | 2010-10-06 | 성균관대학교산학협력단 | Spread spectrum code acquisition apparatus and method thereof |
| CN102098074A (en) * | 2011-02-15 | 2011-06-15 | 北京理工大学 | High-dynamic weak-signal rapid capture method for direct sequence spread spectrum system |
| CN104253774A (en) * | 2014-09-16 | 2014-12-31 | 重庆邮电大学 | System and method for estimating Doppler frequency offset under high-dynamic environment |
| CN104407323A (en) * | 2014-12-11 | 2015-03-11 | 中国工程物理研究院电子工程研究所 | Measuring method for pseudo code delay of spread spectrum signal with high dynamic range and low signal-to-noise ratio |
| CN105158779A (en) * | 2015-07-06 | 2015-12-16 | 中国电子科技集团公司第二十研究所 | Improved PMF-FFT PN code capture method |
| CN105790788A (en) * | 2016-04-28 | 2016-07-20 | 南京理工大学 | Pseudocode-Doppler combined capturing method of direct sequence spread spectrum MSK signal |
| CN106209160A (en) * | 2016-06-29 | 2016-12-07 | 南京理工大学 | A kind of DS msk signal two dimension joint acquisition method based on compressed sensing |
| CN107135013A (en) * | 2017-05-04 | 2017-09-05 | 中国电子科技集团公司第五十四研究所 | A kind of Rapid Acquisition for Direct Sequence Spread-Spectrum Signals method |
| CN107493117A (en) * | 2016-06-12 | 2017-12-19 | 南京理工大学 | The two-dimentional joint acquisition method of DS msk signal under a kind of high dynamic |
-
2018
- 2018-09-08 CN CN201811046970.XA patent/CN109088838B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060205437A1 (en) * | 2005-03-08 | 2006-09-14 | Samsung Electronics Co., Ltd. | Apparatus and method for channel estimation in an SDMA-OFDM system |
| KR20100107716A (en) * | 2009-03-26 | 2010-10-06 | 성균관대학교산학협력단 | Spread spectrum code acquisition apparatus and method thereof |
| CN102098074A (en) * | 2011-02-15 | 2011-06-15 | 北京理工大学 | High-dynamic weak-signal rapid capture method for direct sequence spread spectrum system |
| CN104253774A (en) * | 2014-09-16 | 2014-12-31 | 重庆邮电大学 | System and method for estimating Doppler frequency offset under high-dynamic environment |
| CN104407323A (en) * | 2014-12-11 | 2015-03-11 | 中国工程物理研究院电子工程研究所 | Measuring method for pseudo code delay of spread spectrum signal with high dynamic range and low signal-to-noise ratio |
| CN105158779A (en) * | 2015-07-06 | 2015-12-16 | 中国电子科技集团公司第二十研究所 | Improved PMF-FFT PN code capture method |
| CN105790788A (en) * | 2016-04-28 | 2016-07-20 | 南京理工大学 | Pseudocode-Doppler combined capturing method of direct sequence spread spectrum MSK signal |
| CN107493117A (en) * | 2016-06-12 | 2017-12-19 | 南京理工大学 | The two-dimentional joint acquisition method of DS msk signal under a kind of high dynamic |
| CN106209160A (en) * | 2016-06-29 | 2016-12-07 | 南京理工大学 | A kind of DS msk signal two dimension joint acquisition method based on compressed sensing |
| CN107135013A (en) * | 2017-05-04 | 2017-09-05 | 中国电子科技集团公司第五十四研究所 | A kind of Rapid Acquisition for Direct Sequence Spread-Spectrum Signals method |
Non-Patent Citations (7)
| Title |
|---|
| LINGLONG DAI等: "Joint Code Acquisition and Doppler Frequency Shift Estimation for GPS Signals", 《IEEE》 * |
| PING HUANG等: "Performance Analysis of PN Code Acquisition Using Fast Fourier Transform", 《IEEE》 * |
| YONG GAO等: "A New Demodulation Algorithm of DPSK Signals in High Dynamic Circumstance", 《 2009 IET INTERNATIONAL COMMUNICATION CONFERENCE ON WIRELESS MOBILE & COMPUTING (CCWMC 2009)》 * |
| 张家庆等: "串行直扩MSK调制信号产生及FPGA实现_张家庆", 《信息技术》 * |
| 朱唯唯等: "一种直扩MSK信号的码相位跟踪方法", 《信息技术》 * |
| 李弋鹏: "高动态大多普勒频移伪码快速捕获技术研究", 《数字技术与应用》 * |
| 赵琦: "高动态多普勒条件下伪码快速捕获技术", 《数据采集与处理》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581435A (en) * | 2018-12-28 | 2019-04-05 | 合肥工业大学 | GNSS signal two-step captures data symbol overturning removing method and device |
| CN109581435B (en) * | 2018-12-28 | 2023-07-25 | 合肥工业大学 | GNSS signal double-step captured data symbol overturn elimination method and device |
| CN111082835A (en) * | 2019-12-03 | 2020-04-28 | 南京理工大学 | Pseudo code and Doppler combined capturing method of direct sequence spread spectrum signal under high dynamic condition |
| CN112910497A (en) * | 2021-01-18 | 2021-06-04 | 清华大学 | Quick code capture method for short-spreading-ratio satellite communication system |
| CN112910497B (en) * | 2021-01-18 | 2022-01-25 | 清华大学 | Quick code capture method for short-spreading-ratio satellite communication system |
| CN113904905A (en) * | 2021-09-22 | 2022-01-07 | 湖南艾科诺维科技有限公司 | Capturing device and method for dynamic direct sequence spread spectrum keying (GMSK) signal |
| CN113972929A (en) * | 2021-10-26 | 2022-01-25 | 上海无线电设备研究所 | Method for capturing spread spectrum signal under high dynamic Doppler |
| CN115250134A (en) * | 2021-12-28 | 2022-10-28 | 中科芯集成电路有限公司 | PMF-FFT (pulse-modulated fast Fourier transform) capturing method under large Doppler frequency |
| CN115250134B (en) * | 2021-12-28 | 2024-01-19 | 中科芯集成电路有限公司 | PMF-FFT capturing method under large Doppler frequency |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109088838B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109088838A (en) | Pseudo-code-Doppler's quick capturing method of direct expansion dpsk signal under a kind of high dynamic | |
| CN106646546B (en) | A kind of satellite-signal multidimensional quick capturing method and system | |
| CN105790788B (en) | A kind of pseudo-code of direct expansion msk signal-Doppler's joint acquisition method | |
| CN101082664B (en) | Devices and methods for fast catching signal in high dynamic satellite navigation receiving machine | |
| CN105141340B (en) | The digital method of reseptance of DS msk signal | |
| CN107026810A (en) | The PN synchronization method of burst directly-enlarging system and its DS waveform that happens suddenly | |
| CN107493117B (en) | The two-dimentional joint acquisition method of direct expansion msk signal under a kind of high dynamic | |
| CN101969321B (en) | FFT (Fast Fourier Transform) based large frequency offset secondary catching method of direct sequence spread spectrum system | |
| CN105553506B (en) | A kind of quick capturing method and device of long code spread-spectrum signal | |
| CN108401581B (en) | A kind of PN code quick capturing methods in satellite spectrum-spread communication system | |
| CN101132191A (en) | Baseband signal processing method for GNSS receiver | |
| CN109412644B (en) | Doppler frequency estimation method for direct sequence spread spectrum MSK signal | |
| CN111131117B (en) | Spread spectrum signal multi-period capture fast demodulation method and de-spread receiver | |
| CN110071738A (en) | Spread-spectrum signal based on more pseudo-code branch receivers de-spreads tracking | |
| CN112910499B (en) | Spread spectrum signal accurate acquisition system | |
| CN104065397A (en) | Method and device for synchronously capturing pseudo codes in real time | |
| CN107315186A (en) | The BOC signal capture algorithms based on adding window PMF FFT under residual frequency deviation | |
| CN108196274A (en) | Be applicable in BOC (n, n) signal without fuzziness catching method and device | |
| CN110336583A (en) | A kind of quick catching device and method of Direct Sequence Spread Spectrum Signal | |
| CN108169772A (en) | A kind of satellite signal tracking method of windowing FFT | |
| CN103941269A (en) | PN code capturing method used for satellite navigation system | |
| CN101436877B (en) | Method for capturing multi-path interference resistant PN code self-adapting threshold | |
| CN103427871A (en) | Forwarding interference method for restraining SmartAGC anti-interference capability | |
| CN111082835A (en) | Pseudo code and Doppler combined capturing method of direct sequence spread spectrum signal under high dynamic condition | |
| Chen et al. | Evaluation of binary offset carrier signal capture algorithm for development of the digital health literacy instrument |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20181225 Assignee: NANJING PAIYISHENG ELECTRONIC TECHNOLOGY Co.,Ltd. Assignor: NANJING University OF SCIENCE AND TECHNOLOGY Contract record no.: X2022980002317 Denomination of invention: A pseudo code Doppler fast acquisition method of DSSS DPSK signal under high dynamic Granted publication date: 20201106 License type: Common License Record date: 20220309 |
|
| EE01 | Entry into force of recordation of patent licensing contract |