CN106338746A - Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same - Google Patents
Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same Download PDFInfo
- Publication number
- CN106338746A CN106338746A CN201511031158.6A CN201511031158A CN106338746A CN 106338746 A CN106338746 A CN 106338746A CN 201511031158 A CN201511031158 A CN 201511031158A CN 106338746 A CN106338746 A CN 106338746A
- Authority
- CN
- China
- Prior art keywords
- bit
- group
- values
- finger values
- finger
- 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.)
- Withdrawn
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
-
- 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
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/37—Hardware or software details of the signal processing chain
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention is applicable to the field of navigation field and provides a Beidou satellite navigation receiver, and a method and a device for improving tracking sensitivity of the Beidou satellite navigation receiver. The method comprises the steps of: accumulating an I branch value and a Q branch value in each bit among continuous n bits separately to obtain n groups of bit accumulated values after successful bit synchronization and determination of a first millisecond of a bit period; multiplying the I branch values and the Q branch values in the n groups of bit accumulated values by 2<n> or 2<n-1> kinds of bit compensation values separately, so as to obtain 2<n> or 2<n-1> groups of compensated bit accumulated values; performing m-point FFT operation on the 2<n> or 2<n-1> groups of compensated bit accumulated values separately, so as to obtain 2<n> or 2<n-1> groups of FFT results, wherein each group of FFT results includes m values; finding out the maximum value of each group among the m values of each group of FFT results, so as to obtain 2<n> or 2<n-1> values; and finding out the maximum value of the 2<n> or 2<n-1> values, and confirming the group in which the maximum value exists as a real bit condition. By implementing the Beidou satellite navigation receiver, the method and the device, the maximum length of an integrator-eraser can be increased from 20 or 2 to a multiple of 20 or 2, thereby improving the tracking sensitivity.
Description
Technical field
The invention belongs to navigation field, more particularly, to a kind of Beidou satellite navigation receiver and improve it and follow the tracks of spirit
The method of sensitivity, device.
Background technology
Beidou satellite navigation system and gps system are all global positioning systems, play in present life
More and more important effect, in occupation of very important position in navigation, positioning, time service, the field such as test the speed
Put.The Beidou satellite navigation system of China is fast-developing, the navigation neceiver of Beidou satellite navigation system
Will be more and more universal.Navigation neceiver generally includes: antenna, radio-frequency module, base band signal process mould
Block and other application module.Wherein, baseband signal processing module major function includes searching defending on sky
Star simultaneously demodulates correct navigation message, produce for navigating, positioning, time service, the measurement of the application such as test the speed
Value.
In Beidou satellite navigation system, the signal that each satellite sends is all by uniquely corresponding with this satellite
Pseudo noise code (pseudo-random noise, prn) is modulated, and the cycle of pseudo noise code is 1ms, institute
It is the thick code (ca code) as 1ms for the cycle with the data signal after pscudo-random codc modulation.According to speed and structure
Difference, navigation message is divided into d1 navigation message and d2 navigation message.D1 navigation message speed is 50bps,
And it is modulated with the secondary coding that speed is 1kbps, content comprises basic navigation information (this satellite basic navigation
Information, whole satellite almanac information and other system time synchronization information)；D2 navigation message speed is 500
Bps, content comprise basic navigation information and strengthen information on services (difference of dipper system and integrity information and
Grid points ionosphere information).
Non- geostationary track (non geostationary earth orbit, ngeo) satellite, including in circularly ball rail
Road (medium earth orbit, meo)/inclination geostationary orbit (inclined geosynchronous
Satellite orbit, igso) satellite b1i signal broadcast d1 navigation message, geostationary orbit
The b1i signal broadcast d2 navigation message of (geostationary earth orbit, geo) satellite.
After the trapping module of Beidou satellite navigation receiver captures visible satellite, subsequently enter tracking phase,
Meanwhile, trapping module is supplied to the numbering of this capture satellite of tracking module, Doppler frequency deviation, phase place (i.e. milli
Second border) etc. information.At the tracking phase initial stage, Beidou satellite navigation receiver passes through FLL, phaselocked loop
And code ring closed loop locking, by reduction reception unit frequency, phase place, code phase more accurately close to
Practical situation.By bit synchronous module, it is known that the initial millisecond position of bit.In track loop,
Integration-remover eliminates signal i and q high frequency signal composition and noise by integrating low-pass filter, with
Improve carrier-to-noise ratio.On the premise of knowing the initial millisecond position of bit, the greatest length of integration-remover,
Ngeo is 20 (i.e. 20ms bit periods), and geo is 2 (i.e. 2ms bit periods), yet with
The greatest length of integration-remover is only bit period, and length is too short, and therefore tracking sensitivity is relatively low.
Content of the invention
It is an object of the invention to provide a kind of Beidou satellite navigation receiver and the side improving its tracking sensitivity
, it is intended to the greatest length solving the integration-remover of prior art is only bit period, length is too for method, device
Short, the therefore relatively low problem of tracking sensitivity.
In a first aspect, a kind of the invention provides side of the tracking sensitivity improving Beidou satellite navigation receiver
Method, methods described includes:
In bit synchronization success it is determined that after first millisecond of bit period, by the every bit in continuous n-bit
Interior i finger values and q finger values are added up respectively, obtain n group bit accumulated value, n be more than or
Integer equal to 2；
I finger values in n group bit accumulated value and q finger values are multiplied by 2 respectivelynOr 2n-1Plant bit to compensate
Value, obtains 2nOr 2n-1Group compensate after bit accumulated value, every kind of bit offset include n respectively with n group
Bit accumulated value corresponding bit offset, each bit offset is 1 or -1；
Respectively to 2nOr 2n-1After group compensation, bit accumulated value carries out the fft computing of m point, obtains 2nOr 2n-1
Group fft result, every group of fft result includes m value, and m is more than or equal to n；
In m value of every group of fft result, find out every group of maximum, obtain 2nOr 2n-1Individual value；
2nOr 2n-1Maximum is found out, the group acknowledge that maximum is located is real bit case in individual value.
Second aspect, the invention provides a kind of dress of the tracking sensitivity improving Beidou satellite navigation receiver
Put, described device includes:
Accumulator module, in bit synchronization success it is determined that after first millisecond of bit period, by continuous n
The i finger values in every bit in bit and q finger values are added up respectively, obtain n group bit accumulated value,
N is the integer more than or equal to 2；
Compensating module, for being multiplied by 2 respectively by the i finger values in n group bit accumulated value and q finger valuesnOr
2n-1Plant bit offset, obtain 2nOr 2n-1Bit accumulated value after group compensation, every kind of bit offset includes n
Individual corresponding with n group bit accumulated value respectively bit offset, each bit offset is 1 or -1；
Fft computing module, for respectively to 2nOr 2n-1After group compensation, bit accumulated value carries out the fft of m point
Computing, obtains 2nOr 2n-1Group fft result, every group of fft result includes m value, and m is more than or equal to n；
First comparison module, for, in m value of every group of fft result, finding out every group of maximum, obtaining
To 2nOr 2n-1Individual value；
Second comparison module, for 2nOr 2n-1Maximum is found out, the group that maximum is located is true in individual value
Think real bit case.
The third aspect, the invention provides a kind of Beidou satellite navigation receiver, described Beidou satellite navigation connects
Receipts machine includes the device of the above-mentioned tracking sensitivity of raising Beidou satellite navigation receiver.
In the present invention, due to the true of every bit in the n-bit of input is known that using the method for the present invention
Real-valued.Therefore, it can be properly compensated for the every bit in n-bit, the n-bit after having compensated is just
Integration-the removing of loop can be tracked, thus by the greatest length of integration-remover from 20 (ngeo)
Or 2 (geo) brings up to 20n (ngeo) or 2n (geo), thus improve tracking sensitivity.
Brief description
Fig. 1 is the side of the tracking sensitivity of raising Beidou satellite navigation receiver that the embodiment of the present invention one provides
Method flow chart.
Fig. 2 is the dress of the tracking sensitivity of raising Beidou satellite navigation receiver that the embodiment of the present invention two provides
Put structural representation.
Specific embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect become more apparent, below in conjunction with accompanying drawing
And embodiment, the present invention will be described in further detail.It should be appreciated that described herein be embodied as
Example, only in order to explain the present invention, is not intended to limit the present invention.
In order to technical solutions according to the invention are described, to illustrate below by specific embodiment.
Embodiment one:
Refer to Fig. 1, the tracking of the raising Beidou satellite navigation receiver that the embodiment of the present invention one provides is sensitive
The method of degree comprises the following steps:
S101, in bit synchronization success it is determined that after first millisecond of bit period, by continuous n-bit
I finger values in every bit and q finger values are added up respectively, obtain n group bit accumulated value, n is big
In or be equal to 2 integer.
Assume that the i finger values of ngeo satellite and the numbering of q finger values are i1, q1, i2, q2 ...,
I20, q20, i21, q21, i22, q22 ..., i40, q40 ..., i20xn, q20xn, wherein,
I20xn, q20xn represent the 20th i finger values and the q finger values corresponding to n-th bit respectively, i1,
Q1 represents the value of first millisecond corresponding to first bit.
Assume that the i finger values of geo satellite and the numbering of q finger values are i1, q1, i2, q2, i3, q3,
I4, q4 ..., i2xn, q2xn, wherein i2xn, q2xn represent the 2nd corresponding to n-th bit respectively
Individual i finger values and q finger values, i1, q1 represent the value of first millisecond corresponding to first bit.
In the embodiment of the present invention one, for geo satellite, s101 particularly as follows:
I finger values in every bit in continuous n-bit and q finger values are directly added up respectively, is obtained
To n group bit accumulated value.Particularly as follows: respectively i1, i2 are added up, q1, q2 are added up, and obtain
To the accumulated value of first bit, respectively i3, i4 are added up, q3, q4 are added up, obtained
I finger values in n-th bit and q finger values in the same manner, are tired out by the accumulated value of two bits respectively
Plus, obtain the accumulated value of n-th bit.
Because ngeo satellite is modulated with nh code, therefore, needed to compensate by nh code before cumulative.
For ngeo satellite, s101 specifically includes following steps:
The i finger values of the corresponding millisecond in the every bit in continuous n-bit and q finger values are entered with nh code
Row is multiplied, and obtains the i finger values after nh code compensates and q finger values, and wherein nh code is
(0,0,0,0,0,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0), nh code be 0, then correspond to millisecond i finger values and
It is 1 that q finger values take advantage of 1, nh code respectively, then correspond to the i finger values of millisecond and q finger values take advantage of -1 respectively；
For example: i1, q1 take advantage of 1, and i2, q2 take advantage of 1 ..., i18, q18 take advantage of -1, and i19, q19 take advantage of -1, i20,
Q20 takes advantage of 1；
The i finger values in every bit after nh code is compensated and q finger values are added up respectively, obtain n
Group bit accumulated value.As respectively by the i1 after the compensation of nh code, i2, i3 ..., i20 added up, respectively
Q1 after nh code is compensated, q2, q3 ..., q20 added up, obtain the cumulative of first bit
Value；Respectively by nh code compensation after i21, i22, i23 ..., i40 added up, respectively by nh code
Q21 after compensation, q22, q23 ..., q40 added up, obtain the accumulated value of second bit, with
Reason, the i finger values after compensating the nh code in n-th bit respectively and q finger values are added up, and obtain
Accumulated value to n-th bit.
S102, the i finger values in n group bit accumulated value and q finger values are multiplied by 2 respectivelynOr 2n-1Plant ratio
Special offset, obtains 2nOr 2n-1Bit accumulated value after group compensation, every kind of bit offset includes n respectively
Bit offset corresponding with n group bit accumulated value, each bit offset is 1 or -1.
Because each bit offset has two kinds possible (i.e. -1 or 1), therefore n ratio peculiar 2nPlant bit
Offset is possible, and satellite emission signal adopts QPSK (qpsk) modulation it is contemplated that hardware is realized
Cost, here can be by 2nPlant and be reduced to 2n-1Planting may.Certainly, using 2nPlanting may be also possible,
The hardware costs simply expending is bigger.With n for 5, as a example Big Dipper ngeo satellite, have 24Plant possible, that is,
The possibility of 16 kinds of bit offsets, respectively (- 1-1-1-1-1), (- 1-1-1-1 1), (- 1-1-1
1 -1)、(-1 -1 -1 1 1)、(-1 -1 1 -1 -1)、(-1 -1 1 -1 1)、(-1 -1 1 1 -1)、
(-1 -1 1 1 1)、(-1 1 -1 -1 -1)、(-1 1 -1 -1 1)、(-1 1 -1 1 -1)、(-1 1 -1 1
1), (- 11 1-1-1), (- 11 1-1 1), (- 111 1-1), (- 1111 1), in addition 16
Kind of bit offset may can also be (1-1-1-1-1), (1-1-1-1 1), (1-1-1 1-1),
(1 -1 -1 1 1)、(1 -1 1 -1 -1)、(1 -1 1 -1 1)、(1 -1 1 1 -1)、(1 -1 1 1 1)、
(1 1 -1 -1 -1)、(1 1 -1 -1 1)、(1 1 -1 1 -1)、(1 1 -1 1 1)、(1 1 1 -1 -1)、
(1 1 1 -1 1)、(1 1 1 1 -1)、(1 1 1 1 1).If using 25Plant possible, then include above-mentioned
32 kinds of bit values possibility.
S103, respectively to 2nOr 2n-1After group compensation, bit accumulated value carries out the fft computing of m point, obtains
2nOr 2n-1Group fft result, every group of fft result includes m value, and m is more than or equal to n.
S104, in m of every group of fft result value, find out every group of maximum, obtain 2nOr 2n-1
Individual value.
S105,2nOr 2n-1Find out maximum in individual value, the group acknowledge that maximum is located be real than
Special situation.
Embodiment two:
Refer to Fig. 2, the tracking of the raising Beidou satellite navigation receiver that the embodiment of the present invention two provides is sensitive
The device of degree includes:
Accumulator module 11, in bit synchronization success it is determined that after first millisecond of bit period, will be continuous
The i finger values in every bit in n-bit and q finger values are added up respectively, obtain n group bit and add up
Value, n is the integer more than or equal to 2；
Compensating module 12, for being multiplied by 2 respectively by the i finger values in n group bit accumulated value and q finger valuesn
Or 2n-1Plant bit offset, obtain 2nOr 2n-1Bit accumulated value after group compensation, every kind of bit offset bag
Include n corresponding with n group bit accumulated value respectively bit offset, each bit offset is 1 or -1；
Fft computing module 13, for respectively to 2nOr 2n-1After group compensates, bit accumulated value carries out m point
Fft computing, obtains 2nOr 2n-1Group fft result, every group of fft result include m value, m more than or
Equal to n；
First comparison module 14, for, in m value of every group of fft result, finding out every group of maximum,
Obtain 2nOr 2n-1Individual value；
Second comparison module 15, for 2nOr 2n-1Maximum is found out, the group that maximum is located in individual value
Confirm as real bit case.
In the embodiment of the present invention two, for geostationary orbit geo satellite, described accumulator module is specifically used
In: the i finger values in the every bit in continuous n-bit and q finger values are directly added up respectively, is obtained
To n group bit accumulated value.
For non-geostationary track ngeo satellite, described accumulator module specifically includes:
Take advantage of module, for by the i finger values of the corresponding millisecond in the every bit in continuous n-bit and q branch road
Value is multiplied with nh code, obtains the i finger values after nh code compensates and q finger values, wherein nh code
For (0,0,0,0,0,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0), nh code is 0, then correspond to the i finger values of millisecond
Taking advantage of 1, nh code respectively with q finger values is 1, then correspond to the i finger values of millisecond and q finger values take advantage of -1 respectively；
Cumulative submodule, for the i finger values in the every bit after compensating nh code and q finger values difference
Added up, obtained n group bit accumulated value.
The embodiment of the present invention additionally provides a kind of Beidou satellite navigation receiver, and described Beidou satellite navigation receives
Machine includes the device of the tracking sensitivity of raising Beidou satellite navigation receiver of the embodiment of the present invention two offer.
In embodiments of the present invention, due to passing through the computing to all situations above and the comparison to result,
Know the actual value of every bit in the n-bit of input.Therefore, it can just carry out the every bit in n-bit
Really compensate, the n-bit after having compensated can be carried out the integration-removing of track loop, thus will integrate-
The greatest length of remover brings up to 20n (ngeo) or 2n (geo) from 20 (ngeo) or 2 (geo),
Thus improve tracking sensitivity.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is
Related hardware can be instructed complete by program, described program can be stored in a computer-readable
Take in storage medium, described storage medium, such as rom/ram, disk, CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any modification, equivalent and improvement made within bright spirit and principle etc., should be included in the present invention
Protection domain within.
Claims (7)
1. a kind of method of the tracking sensitivity improving Beidou satellite navigation receiver is it is characterised in that described
Method includes:
In bit synchronization success it is determined that after first millisecond of bit period, by the every bit in continuous n-bit
Interior i finger values and q finger values are added up respectively, obtain n group bit accumulated value, n be more than or
Integer equal to 2；
I finger values in n group bit accumulated value and q finger values are multiplied by 2 respectivelynOr 2n-1Plant bit to compensate
Value, obtains 2nOr 2n-1Group compensate after bit accumulated value, every kind of bit offset include n respectively with n group
Bit accumulated value corresponding bit offset, each bit offset is 1 or -1；
Respectively to 2nOr 2n-1After group compensation, bit accumulated value carries out the fft computing of m point, obtains 2nOr 2n-1
Group fft result, every group of fft result includes m value, and m is more than or equal to n；
In m value of every group of fft result, find out every group of maximum, obtain 2nOr 2n-1Individual value；
2nOr 2n-1Maximum is found out, the group acknowledge that maximum is located is real bit case in individual value.
2. the method for claim 1 is it is characterised in that for geostationary orbit geo satellite,
Described i finger values in every bit in continuous n-bit and q finger values are added up respectively, obtain n
Group bit accumulated value particularly as follows:
I finger values in every bit in continuous n-bit and q finger values are directly added up respectively, is obtained
To n group bit accumulated value.
3. the method for claim 1 is it is characterised in that for non-geostationary track ngeo satellite,
Described i finger values in every bit in continuous n-bit and q finger values are added up respectively, obtain n
Group bit accumulated value specifically includes:
The i finger values of the corresponding millisecond in the every bit in continuous n-bit and q finger values are entered with nh code
Row is multiplied, and obtains the i finger values after nh code compensates and q finger values, and wherein nh code is
(0,0,0,0,0,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0), nh code be 0, then correspond to millisecond i finger values and
It is 1 that q finger values take advantage of 1, nh code respectively, then correspond to the i finger values of millisecond and q finger values take advantage of -1 respectively；
The i finger values in every bit after nh code is compensated and q finger values are added up respectively, obtain n
Group bit accumulated value.
4. a kind of device of the tracking sensitivity improving Beidou satellite navigation receiver is it is characterised in that described
Device includes:
Accumulator module, in bit synchronization success it is determined that after first millisecond of bit period, by continuous n
The i finger values in every bit in bit and q finger values are added up respectively, obtain n group bit accumulated value,
N is the integer more than or equal to 2；
Compensating module, for being multiplied by 2 respectively by the i finger values in n group bit accumulated value and q finger valuesnOr
2n-1Plant bit offset, obtain 2nOr 2n-1Bit accumulated value after group compensation, every kind of bit offset includes n
Individual corresponding with n group bit accumulated value respectively bit offset, each bit offset is 1 or -1；
Fft computing module, for respectively to 2nOr 2n-1After group compensation, bit accumulated value carries out the fft of m point
Computing, obtains 2nOr 2n-1Group fft result, every group of fft result includes m value, and m is more than or equal to n；
First comparison module, for, in m value of every group of fft result, finding out every group of maximum, obtaining
To 2nOr 2n-1Individual value；
Second comparison module, for 2nOr 2n-1Maximum is found out, the group that maximum is located is true in individual value
Think real bit case.
5. device as claimed in claim 4 is it is characterised in that for geostationary orbit geo satellite,
Described accumulator module specifically for: the i finger values in the every bit in continuous n-bit and q finger values are divided
Directly do not added up, obtained n group bit accumulated value.
6. device as claimed in claim 4 is it is characterised in that for non-geostationary track ngeo satellite,
Described accumulator module specifically includes:
Take advantage of module, for by the i finger values of the corresponding millisecond in the every bit in continuous n-bit and q branch road
Value is multiplied with nh code, obtains the i finger values after nh code compensates and q finger values, wherein nh code
For (0,0,0,0,0,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0), nh code is 0, then correspond to the i finger values of millisecond
Taking advantage of 1, nh code respectively with q finger values is 1, then correspond to the i finger values of millisecond and q finger values take advantage of -1 respectively；
Cumulative submodule, for the i finger values in the every bit after compensating nh code and q finger values difference
Added up, obtained n group bit accumulated value.
7. a kind of Beidou satellite navigation receiver is it is characterised in that described Beidou satellite navigation receiver includes
The device of the tracking sensitivity of raising Beidou satellite navigation receiver described in any one of claim 4 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031158.6A CN106338746A (en) | 2015-12-31 | 2015-12-31 | Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031158.6A CN106338746A (en) | 2015-12-31 | 2015-12-31 | Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106338746A true CN106338746A (en) | 2017-01-18 |
Family
ID=57826676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511031158.6A Withdrawn CN106338746A (en) | 2015-12-31 | 2015-12-31 | Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106338746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650619A (en) * | 2020-07-17 | 2020-09-11 | 广东星舆科技有限公司 | Method and device for determining bit edge position, readable medium and bit synchronization method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090295631A1 (en) * | 2008-05-29 | 2009-12-03 | Qualcomm Incorporated | Apparatus and method for cross-correlation spur mitigation |
| US20120319899A1 (en) * | 2011-06-16 | 2012-12-20 | Jawaharlal Tangudu | Dynamic switching to bit-synchronous integration to improve gps signal detection |
| CN103091686A (en) * | 2011-10-31 | 2013-05-08 | 北京大学 | Bit synchronization method and device of compatible Beidou satellite navigation system and global position system (GPS) |
| CN103364809A (en) * | 2012-03-31 | 2013-10-23 | 迈实电子(上海)有限公司 | Apparatus and method for determining navigation bit boundary, receiving machine, mobile equipment and method for satellite navigation and positioning |
| CN104880720A (en) * | 2015-05-05 | 2015-09-02 | 惠州市峰华经纬科技有限公司 | Bit synchronization method of weak signal satellite navigation system |
-
2015
- 2015-12-31 CN CN201511031158.6A patent/CN106338746A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090295631A1 (en) * | 2008-05-29 | 2009-12-03 | Qualcomm Incorporated | Apparatus and method for cross-correlation spur mitigation |
| US20120319899A1 (en) * | 2011-06-16 | 2012-12-20 | Jawaharlal Tangudu | Dynamic switching to bit-synchronous integration to improve gps signal detection |
| CN103091686A (en) * | 2011-10-31 | 2013-05-08 | 北京大学 | Bit synchronization method and device of compatible Beidou satellite navigation system and global position system (GPS) |
| CN103364809A (en) * | 2012-03-31 | 2013-10-23 | 迈实电子(上海)有限公司 | Apparatus and method for determining navigation bit boundary, receiving machine, mobile equipment and method for satellite navigation and positioning |
| CN104880720A (en) * | 2015-05-05 | 2015-09-02 | 惠州市峰华经纬科技有限公司 | Bit synchronization method of weak signal satellite navigation system |
Non-Patent Citations (3)
| Title |
|---|
| QIDONG XIAO 等: ""A Novel Weak Signal Acquisition Scheme for Beidou nGEO Satellite Signals"", 《2015 5TH INTERNATIONAL CONFERENCE ON INFORMATION SCIENCE AND TECHNOLOGY (IC1ST)》 * |
| 王建辉 等: ""基于FFT和电文估计的GNSS弱信号载波跟踪方法"", 《国防科技大学学报》 * |
| 郑睿 等: ""一种自适应最大似然GPS比特同步方法"", 《系统仿真学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650619A (en) * | 2020-07-17 | 2020-09-11 | 广东星舆科技有限公司 | Method and device for determining bit edge position, readable medium and bit synchronization method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7898475B2 (en) | GNSS receiver with reduced storage requirements | |
| CN101650418B (en) | Method and system for processing signal | |
| CA2643574C (en) | Method and device for fast correlation calculation | |
| CA2583175C (en) | Systems and methods for acquisition and tracking of low cnr gps signals | |
| KR20160147775A (en) | Method and apparatus for processing radionavigation signals for atmospheric monitoring | |
| CN102540228A (en) | High precision single point positioning system of single frequency global positioning system (GPS) and method | |
| CN111381259A (en) | Method and system for enhancing Beidou navigation system by using low-earth-orbit satellite | |
| CN101498784A (en) | Apparatus and method for tracking satellite signal | |
| CN101937089B (en) | Method and apparatus for weak data bit sync in a positioning system | |
| Braasch et al. | Tutorial: GPS receiver architectures, front-end and baseband signal processing | |
| CN109782314A (en) | GNSS satellite signal receives classification processing Simulation Experimental Platform | |
| CN103399329A (en) | GNSS (global navigation satellite system) receiver and intermediate frequency data processing method thereof | |
| Li et al. | Design and implementation of an open-source BDS-3 B1C/B2a SDR receiver | |
| Süzer et al. | PRN code correlation in GPS receiver | |
| US20140372496A1 (en) | Method for performing and validating navigation bit synchronization | |
| US20120207144A1 (en) | Acquisition method with improved multi-frequency correlation | |
| CN106338746A (en) | Beidou satellite navigation receiver, and method and device for improving tracking sensitivity of same | |
| CN105527632A (en) | Weak signal processing method and device of global satellite navigation system | |
| CN102375149B (en) | Multi-associated-branch mixed spacing delay lock loop and application method thereof | |
| CN106338751A (en) | Satellite signal bit synchronization method and device, and navigation receiver | |
| CN108169773A (en) | A kind of satellite navigation signals tracking based on maximum likelihood coherent integration | |
| CN103339526B (en) | Equipment and method | |
| CN107479071B (en) | Pseudolite receiver and Pseudolite signal method of reseptance | |
| US11579311B2 (en) | Methods, devices, systems, media, and receivers for processing GNSS signals | |
| CN109782307B (en) | Polarity determination method and device for carrier phase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 518000 Guangdong, Nanshan District high tech Zone, Shenzhen Software Park Phase 1, building 4, room, building 4, 406-421 Applicant after: Shenzhen Shenyang electronic Limited by Share Ltd Address before: 518000 Guangdong, Nanshan District high tech Zone, Shenzhen Software Park Phase 1, building 4, room, building 4, 406-421 Applicant before: Aike Chuangxin Microelectronic Co., Ltd. |
|
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170118 |