CN104125003B - A kind of portable satellite receiver satellite quick lock systems - Google Patents
A kind of portable satellite receiver satellite quick lock systems Download PDFInfo
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- CN104125003B CN104125003B CN201310148424.8A CN201310148424A CN104125003B CN 104125003 B CN104125003 B CN 104125003B CN 201310148424 A CN201310148424 A CN 201310148424A CN 104125003 B CN104125003 B CN 104125003B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of portable satellite receiver satellite quick lock systems, coarse adjustment module includes：Input module；Locating module；For the angle calculation module at the angle according to needed for receiver geographical location and satellite position calculation coarse adjustment；For the angle display module of angles of display result of calculation；Fine tuning module includes：For receiving the signal receiving module of satellite downlink beacon signal；For carrying out the satellite-signal power computation module of signal power calculating according to downlink beacon signal；For the power display module of the manual fine-tuning real-time display signal power according to user.Signal strength in power display module real-time display trim process of the present invention in bandwidth, intuitively whether the result of displaying fine tuning operation is accurate, and it is fast to finely tune easy to operate and speed；Signal receiving module receives satellite downlink beacon signal and passes through the measurement that satellite-signal power computation module realizes signal strength, without emitting signal by antenna, can effectively avoid and faces star interference, signal strength measurement essence higher.
Description
Technical field
The present invention relates to technical field of satellite communication, more particularly to a kind of portable satellite receiver satellite quick lock in
System.
Background technology
Satellite communication have three-dimensional seamless coverage ability, unique flexible universal service ability, overlay area it is removable
Property, wide area complex network form ability, wide area Internet interactive connection abilities and distinctive Wide Area Broadcast and multicast energy
Power can be adapted for multiple business, obtained increasingly in military communication, mobile communication, emergency communication and field of broadcast televisions
It is widely applied.
So far, there is the ground satellite station of multiple business ability, a variety of prices to meet different scenes
Application demand, as vehicle satellite communication in motion is usually applied to vehicular platform, and price is costly, but it is in some automobiles to limit to
The place that cannot be reached can not then use.Portable satellite receiver is exactly that one kind limits from any carrier, is low-cost
Satellite communication terminal.In use, staff carries or bears portable satellite receiver and reaches use site, expansion
The antenna of receiver, locking satellite（To star）The connection with command centre can be established afterwards.
However, traditional portable satellite receiver satellite quick lock systems only complete coarse adjustment and just terminate to star mostly
It operates, the accuracy of locking satellite signal is relatively low, and the communication reliability of satellite communication system is poor.Further, since tradition is just
The intrinsic reason for taking formula receiver prevents pitching, orientation, the mark of polarizing angle from infinitely refining, to be typically only capable to degree of being accurate to
（°）, this causes certain obstruction to the levels of precision directly operated manually.
Such as ZL200410064896.6, portable satellite receiver quickly searches star method and apparatus, according to receiving latitude
With receive constellation, by preset reception antenna reflecting surface orientation and the pitch angle of manually tabling look-up, by centered on preset orientation ±
90 ° of spatial domains are divided into several fields of search, one by one range searching, until the maximum locking orientation of signal and pitching.The tradition searches star method
It is had the following problems with device：（1）Region helix, which scans, to be realized to spatial domain using mechanization design, structure is complex, and sets
It is higher to count cost；（2）By preset reception antenna reflecting surface orientation and the pitch angle of manually tabling look-up, labor workload is larger, intelligence
Change degree is low, and angle calculation accuracy is not high enough；（3）Pitch angle and azimuth are only considered during locking satellite, is not examined
Consider the polarizing angle of receiver antenna, can not ensure that polarization oscillator is adjusted to the direction consistent with electromagnetic wave, it is dry to be susceptible to polarization
It disturbs, directly affects to star accuracy, so as to influence satellite signal receiving effect.
For another example ZL201210286953.X, Portable narrow band satellite communication device and its control method, carry according to GPS module
The local information taken calculates azimuth of the local position with respect to Mr. Yu telecommunication satellite and pitch angle；According to azimuth, pitching
Angle and polarizing angle carry out coarse adjustment to star；Beacon receiver judges signal strength values using the first bandwidth, thin according to signal strength values
Azimuth, pitch angle and polarizing angle are adjusted, until signal strength values are maximum.This has the following problems star method：（1）Believe in satellite
In the measurement process of number intensity, this needs star method using two bandwidth, and there are the limitations of amount of bandwidth；（2）Believe in satellite
In the measurement process of number intensity：A radiofrequency signal is sent by antenna first, then receives the radio frequency forwarded through satellite again
Signal.Since in signal strength measurement, receiver antenna has only completed coarse adjustment, not completely to satelloid, therefore to satellite
It can cause to face star interference due to angular deviation when emitting signal, directly affect the measuring accuracy of satellite signal strength.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of portable satellites high to star accuracy to connect
Receipts machine satellite quick lock systems, angle calculation module is according to the position and receiver local position for being intended to locking satellite from host computer
Azimuth, pitch angle and polarizing angle needed for coarse adjustment, counting accuracy is high, intelligence degree is high, easy to use；Power display module
Show the signal strength in bandwidth always in trim process, intuitively whether the result of displaying fine tuning operation is accurate, fine tuning behaviour
It is fast to make convenient and speed；Consider azimuth, pitch angle and polarizing angle, adjustment polarizing angle causes polarization oscillator to be adjusted to and electricity
The consistent direction of magnetic wave, the signal strength of oscillator sensing is maximum, can avoid the occurrence of polarization interference so that reception is optimal, right
Star accuracy higher；Currently received signal strength is detected first, progressive reduction bandwidth after maximum point is obtained, without amount of bandwidth
Limitation so that user, which sees, must become apparent from understanding；Signal receiving module receives satellite downlink beacon signal and is believed by satellite
Number power computation module realizes the measurement of signal strength, without emitting signal by antenna, can effectively avoid the influence for facing star interference,
So that the measuring accuracy higher of satellite signal strength.
The purpose of the present invention is what is be achieved through the following technical solutions：A kind of portable satellite receiver satellite fast lock
System is determined, including coarse adjustment module and fine tuning module.
The coarse adjustment module includes：
For inputting and selecting to be intended to the input module of locking satellite；
For the locating module in location receiver geographical location；
For pitch angle, azimuth, polarizing angle according to needed for receiver geographical location and selected satellite position calculation coarse adjustment
Angle calculation module；
Angle calculation module includes pitch angle computational submodule, declinometer operator module and polarizing angle computational submodule.
The connecting line of satellite receiver and fixed statellite is known as demand line, the projection of demand line on the ground, i.e. satellite connects
Camber line between receipts machine and substar is known as rhumb line of the satellite receiver to fixed statellite, the plane that rhumb line is determined with demand line
Referred to as azimuth plane.The due south direction of warp is formed in the direction of the clock with azimuth plane where azimuth refers to satellite receiver
Angle represents that pitch angle refers to the rhumb line of satellite receiver and the angle of demand line with ∠ MAN.
Fig. 1 gives the geometrical relationship between fixed statellite S and satellite receiver A.In figure, A represents satellite receiver, S
Represent fixed statellite, O represents earth the earth's core, and B is the warp of satellite receiver A and the intersection point in equator, and the line of O and S are in the earth
Intersection point C on surface is known as substar, is known as rhumb line by the camber line AC of A points and C points on earth surface, and AN is cutting for AC
Line, AM are the tangent line of AB, and face OAS is azimuth, and D is the intersection point of tangent line AM and equatorial plane, and E is tangent line AN and equatorial plane
Intersection point.
If the longitude and latitude of satellite receiver A are respectivelyAnd θ1, fixed statellite longitude isDifference of longitudeSatellite receiver antenna is provided in detail below to the azimuth φ needed for satelloida, pitch angle φeAnd polarizing angle
φjFormulation process.
Azimuthal calculating process is as follows：
It can be obtained by Fig. 1：
AD=ODsin θ1；
The azimuth of satellite receiver antenna can be drawn by above three formula：
It is acquired using the azimuth that above formula is obtained on the basis of the direction of due south, by regulation, azimuth is all with due north
On the basis of direction, therefore actual azimuth according to the accuracy relation and position of antenna and satellite except converting
Outside, the coordinate system that be also transformed on the basis of direct north.
The calculating process of pitch angle is as follows：
For pitch angle is obtained, the extended line for being the parallel lines SF, OA of EA intersects at point F with SF, is understood by parallel relation
In right angled triangle AFS：
Again：
OF=OScos α=(OC+CS) cos α；
FS=OSsin α=(OC+CS) sin α；
Therefore have：
OA and OC is distance of the satellite receiver away from earth the earth's core in above formula, is represented with R, takes earth mean radius 6378 public
In；All geostationary satellites are all distributed overhead under the line, and height is represented with h, take 35860 kilometers, bring above formula into and obtain：
Therefore pitch angle：
The calculating process of polarizing angle is as follows：
The electromagnetic wave of aerial radiation is all polarized, and polarization of electromagnetic wave is that electric field is sweared in communication process according to electromagnetic wave
The direction of amount defines, if it is always that the electric field intensity of electromagnetic wave, which is projected in the track on the vertical plane of the direction of propagation,
Line, then referred to as linear polarization；If electric field intensity projected footprint is circle or oval, for circular polarisation or elliptic polarization, satellite spoke
The polarization of incident polarization ripple and the polarization of ground level reception antenna define benchmark difference, for a satellite receiving earth station,
The polarization of its antenna is defined on the basis of ground level.The electric wave of electric field intensity plane and earth surface is horizontal polarization, i.e.,
The narrow side of feed rectangular waveguide mouth is perpendicular to ground.
When the longitude of satellite receiver is equal with the in-orbit longitude of satellite, the electric field component of polarized wave is just parallel（Or it hangs down
Directly）In the ground level of satellite receiver, polarizing angle is zero at this time.As long as satellite receiver not on a longitude, is defended with satellite
Electric field in the polarized wave that star transmission comes there is an angle with ground level, this angle is known as polarizing angle.In order to reach
Good reception, adjusts outside the azimuth and pitch angle of receiver antenna, should also adjust feed according to the numerical value of polarizing angle
The direction of rectangular waveguide mouth so that polarization oscillator is adjusted to the direction consistent with electromagnetic wave, and polarization at this time exactly matches and satellite
The polarization that transmission comes, the signal strength of oscillator sensing is maximum, and reception is optimal.Its pole of the satellite receiver of diverse geographic location
Change angle is also different, and satellite receiver antenna is to the theoretical polarizing angle needed for satelloid：
Further, the step S103 completes pitch angle of the satellite compared with portable satellite receiver, azimuth
And after polarizing angle calculates, one is further included according to the step of portable satellite receiver and satellite longitude relation corrected azimuth.
For angles of display result of calculation, user is instructed to manually adjust receiver angle with complete the angle of coarse adjustment show mould
Block；
The fine tuning module includes：
For receiving the signal receiving module of satellite downlink beacon signal；
For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to received satellite downlink beacon signal
And find out the satellite-signal power computation module of maximum power point；
Satellite-signal power computation module uses Split Radix FFT Algorithm：
If sequence x (n) length is N, then the expression formula X (k) of split-radix FFT can be represented by the formula：
Wherein,
And
For the power display module of the manual fine-tuning real-time display satellite-signal power according to user.
Power display module shows the signal strength in bandwidth always in trim process, the knot of display fine tuning operation directly perceived
Whether fruit is accurate：If finding that the intensity of beacon frequency point declines during azimuth or pitch angle adjustment, illustrate adjustment direction mistake
By mistake, back is needed to adjust；If intensity improves, direction is correct, continues to adjust to the direction；When intensity is raised to certain maximum
After begin to decline, this maximum is optimum orientation, and azimuth and pitch angle are fixed on this direction.
Further, locating module includes GPS positioning module or electronic compass locating module.
Further, input module is the visualization end-user interface of receiver.
Further, coarse adjustment module further includes one for completing pitch angle, azimuth and polarization in angle calculation module
After angle calculates, according to receiver and the correcting module of satellite longitude relation corrected azimuth.
The beneficial effects of the invention are as follows：
1）Tradition machinery coarse adjustment mode is replaced using manual coarse adjustment mode, easy to use, coarse adjustment speed is fast；
2）Angle calculation module according to be intended to locking signal satellite position and the autonomous computer azimuth angle of receiver local position,
Pitch angle and polarizing angle, counting accuracy is high, speed is fast, and intelligence degree is high, easy to use；
3）Signal strength in power display module real-time display trim process in bandwidth, intuitively displaying fine tuning operate
As a result it is whether accurate, it is fast to finely tune easy to operate and speed；
4）Consider azimuth, pitch angle and polarizing angle, the adjustment polarizing angle oscillator that polarize is adjusted to and electromagnetic wave
Consistent direction, the signal strength of oscillator sensing is maximum, avoids the occurrence of polarization interference so that reception is optimal, accurate to star
Spend higher；
5）Currently received signal strength is detected first, progressive reduction bandwidth after maximum point is obtained, without amount of bandwidth
Limitation so that user, which sees, must become apparent from understanding；
6）Signal receiving module, which receives satellite downlink beacon signal and passes through satellite-signal power computation module, realizes signal
The measurement of intensity without emitting signal by antenna, can effectively avoid the influence for facing star interference so that the measurement of satellite signal strength
Accuracy higher；
7）After angle calculation module completes satellite compared with the calculating of the pitch angle of receiver, azimuth and polarizing angle, according to
The longitude relation corrected azimuth of receiver and satellite helps to further improve satellite locking accuracy；
8）It is applied widely, portable receiver is may be not only suitable for, push to talk, Jing Zhongtong can also be perfectly suitable for
The satellite receiver devices such as antenna；
9）Intuitively lock star is promptly realized by the visualization terminal with data processing function, can greatly improve biography
The accuracy of system portable receiver locking satellite signal, so as to effectively promote the communication reliability of satellite communication system.
Description of the drawings
Fig. 1 is angle calculation module computer azimuth angle, pitch angle, the geometry schematic diagram of polarizing angle；
Fig. 2 is the structural schematic block diagram of the present invention；
Fig. 3 is coarse adjustment module operational flowchart of the present invention；
Fig. 4 is present invention fine tuning module operational flowchart.
Specific embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in Fig. 2, a kind of portable satellite receiver satellite quick lock systems, including coarse adjustment module and fine tuning mould
Block：Wherein, the coarse adjustment module includes：
For inputting and selecting to be intended to the input module of locking satellite, input module is visualization terminal user circle of receiver
Face；
For the locating module in location receiver geographical location, locating module includes GPS positioning module or electronic compass is determined
Position module；
For pitch angle, azimuth, polarizing angle according to needed for receiver geographical location and selected satellite position calculation coarse adjustment
Angle calculation module；
With for angles of display result of calculation, user is instructed to manually adjust receiver angle show to complete the angle of coarse adjustment
Module.
The angle calculation module includes pitch angle computational submodule, declinometer operator module and polarizing angle and calculates son
Module, the calculating process of each angle calculation submodule are as follows：
The connecting line of receiver and fixed statellite is known as demand line, the projection of demand line on the ground, i.e. satellite receiver
Camber line between substar is known as rhumb line of the satellite receiver to fixed statellite, and the plane that rhumb line is determined with demand line is known as
Azimuth plane.The folder that the due south direction of warp where azimuth refers to satellite receiver is formed in the direction of the clock with azimuth plane
Angle represents that pitch angle refers to the rhumb line of satellite receiver and the angle of demand line with ∠ MAN.
Fig. 1 gives the geometrical relationship between fixed statellite S and satellite receiver A.In figure, A represents satellite receiver, S
Represent fixed statellite, O represents earth the earth's core, and B is the warp of satellite receiver A and the intersection point in equator, and the line of O and S are in the earth
Intersection point C on surface is known as substar, is known as rhumb line by the camber line AC of A points and C points on earth surface, and AN is cutting for AC
Line, AM are the tangent line of AB, and face OAS is azimuth, and D is the intersection point of tangent line AM and equatorial plane, and E is tangent line AN and equatorial plane
Intersection point.
If the longitude and latitude of satellite receiver A are respectivelyAnd θ1, fixed statellite longitude isDifference of longitudeSatellite receiver antenna is provided in detail below to the azimuth φ needed for satelloida, pitch angle φeAnd polarizing angle
φjFormulation process.
The calculating process of declinometer operator module is as follows：
It can be obtained by Fig. 1：
AD=ODsin θ1；
The azimuth of satellite receiver antenna can be drawn by above three formula：
It is acquired using the azimuth that above formula is obtained on the basis of the direction of due south, by regulation, azimuth is all with due north
On the basis of direction, therefore actual azimuth according to the accuracy relation and position of antenna and satellite except converting
Outside, the coordinate system that be also transformed on the basis of direct north.
The calculating process of pitch angle computational submodule is as follows：
For pitch angle is obtained, the extended line for being the parallel lines SF, OA of EA intersects at point F with SF, is understood by parallel relation
In right angled triangle AFS：
Again：
OF=OScos α=(OC+CS) cos α；
FS=OSsin α=(OC+CS) sin α；
Therefore have：
OA and OC is distance of the satellite receiver away from earth the earth's core in above formula, is represented with R, takes earth mean radius 6378 public
In；All geostationary satellites are all distributed overhead under the line, and height is represented with h, take 35860 kilometers, bring above formula into and obtain：
Therefore pitch angle：
The calculating process of polarizing angle computational submodule is as follows：
The electromagnetic wave of aerial radiation is all polarized, and polarization of electromagnetic wave is that electric field is sweared in communication process according to electromagnetic wave
The direction of amount defines, if it is always that the electric field intensity of electromagnetic wave, which is projected in the track on the vertical plane of the direction of propagation,
Line, then referred to as linear polarization；If electric field intensity projected footprint is circle or oval, for circular polarisation or elliptic polarization, satellite spoke
The polarization of incident polarization ripple and the polarization of ground level reception antenna define benchmark difference, for a satellite receiving earth station,
The polarization of its antenna is defined on the basis of ground level.The electric wave of electric field intensity plane and earth surface is horizontal polarization, i.e.,
The narrow side of feed rectangular waveguide mouth is perpendicular to ground.
When the longitude of satellite receiver is equal with the in-orbit longitude of satellite, the electric field component of polarized wave is just parallel（Or it hangs down
Directly）In the ground level of satellite receiver, polarizing angle is zero at this time.As long as satellite receiver not on a longitude, is defended with satellite
Electric field in the polarized wave that star transmission comes there is an angle with ground level, this angle is known as polarizing angle.In order to reach
Good reception, adjusts outside the azimuth and pitch angle of receiver antenna, should also adjust feed according to the numerical value of polarizing angle
The direction of rectangular waveguide mouth so that polarization oscillator is adjusted to the direction consistent with electromagnetic wave, and polarization at this time exactly matches and satellite
The polarization that transmission comes, the signal strength of oscillator sensing is maximum, and reception is optimal.Its pole of the satellite receiver of diverse geographic location
Change angle is also different, and satellite receiver antenna is to the theoretical polarizing angle needed for satelloid：
Further, coarse adjustment module further includes one for completing pitch angle, azimuth and polarization in angle calculation module
After angle calculates, according to receiver and the correcting module of satellite longitude relation corrected azimuth.
As shown in figure 3, coarse adjustment module operating procedure is as follows：
S101：Locating module determines the position and orientation of portable satellite receiver using positioner；
S102：It is inputted by input module and selects the satellite to be locked；
S103：According to satellite and the location information of portable satellite receiver, which is calculated by angle calculation module
Compared with the pitch angle of receiver, azimuth and polarization angle information；
S104：The angle of receiver is manually adjusted according to each angle information, makes its rough alignment satellite to be locked, is completed
Coarse adjustment.
The fine tuning module includes：
For receiving the signal receiving module of satellite downlink beacon signal；
For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to received satellite downlink beacon signal
And find out the satellite-signal power computation module of maximum power point；
With the power display module for the manual fine-tuning real-time display satellite-signal power according to user.
Wherein, the satellite-signal power computation module uses Split Radix FFT Algorithm：
If sequence x (n) length is N, then the expression formula X (k) of split-radix FFT can be represented by the formula：
Wherein,
And
The power display module shows the signal strength in bandwidth always in trim process, display fine tuning behaviour directly perceived
Whether the result of work is accurate：If finding that the intensity of beacon frequency point declines during azimuth or pitch angle adjustment, illustrate to adjust
Anisotropy needs back to adjust；If intensity improves, direction is correct, continues to adjust to the direction；When intensity is raised to centainly
It is begun to decline after maximum, this maximum is optimum orientation, and azimuth and pitch angle are fixed on this direction.
As shown in figure 4, fine tuning module operating procedure is as follows：
S201：On the basis of coarse adjustment, signal receiving module receives satellite downlink beacon signal, and by satellite-signal power meter
Calculate the satellite-signal power calculation in the certain BREATHABLE BANDWIDTH of module progress；
S202：Draw the maximum power point of satellite-signal；
S203：In power display module（Visualize terminal）The lower fine tuning portable satellite receiver of power instruction pitching
Angle and azimuth are allowed to be directed at the maximum power point；
S204：Fine tuning polarizing angle and the maximum power point for observing visualization terminal are selected in trim process and cause power most
Big polarizing angle completes fine tuning.
Claims (3)
1. a kind of portable satellite receiver satellite quick lock systems including coarse adjustment module and finely tune module,
The coarse adjustment module includes：
For inputting and selecting to be intended to the input module of locking satellite；
For the locating module in location receiver geographical location；
For the angle of pitch angle, azimuth, polarizing angle according to needed for receiver geographical location and selected satellite position calculation coarse adjustment
Spend computing module；
For angles of display result of calculation, user is instructed to manually adjust receiver angle to complete the angle display module of coarse adjustment；
The fine tuning module includes：
For receiving the signal receiving module of satellite downlink beacon signal；
For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to received satellite downlink beacon signal and looking for
Go out the satellite-signal power computation module of maximum power point；
For the power display module of the manual fine-tuning real-time display satellite-signal power according to user, it is characterised in that：
Coarse adjustment module operating procedure is as follows：
S101：Locating module determines the position and orientation of portable satellite receiver using positioner；
S102：It is inputted by input module and selects the satellite to be locked；
S103：According to satellite and the location information of portable satellite receiver, it is opposite which is calculated by angle calculation module
In the pitch angle of receiver, azimuth and polarization angle information；
S104：The angle of receiver is manually adjusted according to each angle information, makes its rough alignment satellite to be locked, is completed thick
It adjusts；
It is as follows to finely tune module operating procedure：
S201：On the basis of coarse adjustment, signal receiving module receives satellite downlink beacon signal, and by satellite-signal power calculation mould
Block carries out the satellite-signal power calculation in certain BREATHABLE BANDWIDTH；
S202：Draw the maximum power point of satellite-signal；
S203：Pitch angle and the azimuth of portable satellite receiver are finely tuned under the power instruction of power display module, is allowed to
It is directed at the maximum power point；
S204：Fine tuning polarizing angle and the maximum power point for observing visualization terminal are selected in trim process so that prominent
Polarizing angle completes fine tuning；
Adjustment polarizing angle causes polarization oscillator to be adjusted to the direction consistent with electromagnetic wave, and the signal strength of oscillator sensing is maximum；It is first
Currently received signal strength is first detected, obtains progressive reduction bandwidth after maximum point；Signal receiving module receives satellite downlink letter
Mark signal simultaneously passes through the measurement that satellite-signal power computation module realizes signal strength, without emitting signal by antenna；
The longitude and latitude of the satellite receiver be respectivelyAnd θ1, fixed statellite longitude isDifference of longitude
AD=OD sin θs1；
tanφa=DE/AD, wherein, φaSatellite receiver antenna represents satellite receiver, S to the azimuth needed for satelloid, A
Represent fixed statellite, O represents earth the earth's core, and B is the warp of satellite receiver A and the intersection point in equator, and the line of O and S are in the earth
Intersection point C on surface is known as substar, is known as rhumb line by the camber line AC of A points and C points on earth surface, and AN is cutting for AC
Line, AM are the tangent line of AB, and face OAS is azimuth, and D is the intersection point of tangent line AM and equatorial plane, and E is tangent line AN and equatorial plane
Intersection point；
For pitch angle is obtained, the extended line for being the parallel lines SF, OA of EA intersects at point F with SF, from parallel relation, at right angle
In triangle AFS：
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<mi>h</mi>
</mrow>
</mfrac>
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OA and OC is distance of the satellite receiver away from earth the earth's core in above formula, is represented with R, takes 6378 kilometers of earth mean radius；
All geostationary satellites are all distributed overhead under the line, and height is represented with h, take 35860 kilometers, then for：
It is so as to calculate pitch angle：
Theoretical polarizing angle is：
Wherein, the satellite-signal power computation module uses Split Radix FFT Algorithm：If sequence x (n) length is N, then divide
The expression formula X (k) of base FFT can be represented by the formula：
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And
2. a kind of portable satellite receiver satellite quick lock systems according to claim 1, it is characterised in that：It is described
Locating module include GPS positioning module or electronic compass locating module.
3. a kind of portable satellite receiver satellite quick lock systems according to claim 1, it is characterised in that：It is described
Coarse adjustment module further include one for completing pitch angle in angle calculation module, after azimuth and polarizing angle calculate, according to connecing
The correcting module of receipts machine and satellite longitude relation corrected azimuth.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339435A (en) * | 2008-08-08 | 2009-01-07 | 上海杰盛无线通讯设备有限公司 | Method for searching and tracking satellite |
| CN102662188A (en) * | 2012-04-11 | 2012-09-12 | 北京星网宇达科技股份有限公司 | Initializing method of mobile satellite communication antenna |
| CN102843179A (en) * | 2012-08-13 | 2012-12-26 | 北京盈想东方科技发展有限公司 | Portable narrow band satellite communication device and control method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101339435A (en) * | 2008-08-08 | 2009-01-07 | 上海杰盛无线通讯设备有限公司 | Method for searching and tracking satellite |
| CN102662188A (en) * | 2012-04-11 | 2012-09-12 | 北京星网宇达科技股份有限公司 | Initializing method of mobile satellite communication antenna |
| CN102843179A (en) * | 2012-08-13 | 2012-12-26 | 北京盈想东方科技发展有限公司 | Portable narrow band satellite communication device and control method thereof |
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Address after: 610000 Building 1, No. 11, Gaopeng Avenue, Chengdu hi tech Zone, Chengdu, Sichuan Patentee after: Chengdu Guoheng Space Technology Engineering Co.,Ltd. Address before: No. 1 high tech Zone Gaopeng road in Chengdu city of Sichuan Province in 610041 Patentee before: CHENGDU GUOHENG SPACE TECHNOLOGY ENGINEERING Co.,Ltd. |