CN104125003A - Rapid satellite locking system of portable satellite receiver - Google Patents

Abstract

The invention discloses a rapid satellite locking system of a portable satellite receiver. A coarse tuning module contains an input module, a positioning module, an angle calculation module for calculating angles required by coarse tuning according to geographic position of the receiver and position of a satellite and an angle display module for displaying an angle calculation result. A fine tuning module contains a signal receiving module for receiving a downlink beacon signal of the satellite, a satellite signal power calculation module for calculating signal power according to the downlink beacon signal, and a power display module for displaying the signal power at real time according to manual fine-tuning of a user. The power display module displays signal intensity within bandwidth during the fine-tuning process at real time, and whether the result of the fine-tuning operation is accurate is visually shown. The fine-tuning operation is convenient and fast. The signal receiving module receives the downlink beacon signal of the satellite and measurement of the signal intensity is realized through the satellite signal power calculation module. It is not necessary to transmit a signal by an antenna. Adjacent satellite interference can be avoided effectively. Accuracy of signal intensity measurement is higher.

Description

A kind of portable satellite receiver satellite quick lock in system

Technical field

The present invention relates to technical field of satellite communication, particularly relate to a kind of portable satellite receiver satellite quick lock in system.

Background technology

Mobility, wide area complex network that satellite communication has three-dimensional seamless coverage ability, unique universal service ability, overlay area flexibly form ability, the mutual concatenation ability of wide area Internet, and distinctive wide area broadcast and multicast ability, go for multiple business, in military communication, mobile communication, emergency communication and field of broadcast televisions, obtained application more and more widely.

Up to now, occurred that the ground satellite station of multiple business ability, multiple price is meeting different scene application demands, as vehicle satellite communication in motion is applied to vehicular platform conventionally, and price is comparatively expensive, but limitation is that the place that can not arrive at some automobile cannot be used.Portable satellite receiver is exactly a kind of restriction of any carrier, satellite communication terminal with low cost of not being subject to.In use, staff carries or bears portable satellite receiver and arrive to use on-the-spotly, launches the antenna of receiver, can set up and being connected of command centre after locking satellite (to star).

Yet traditional portable satellite receiver satellite quick lock in system is mostly only accomplished to coarse adjustment and just finishes star to operate, the accuracy of locking satellite signal is lower, and the communication reliability of satellite communication system is poor.In addition, because the intrinsic reason of conventional portable receiver makes the infinitely refinement of sign of pitching, orientation, polarizing angle, conventionally can only degree of being accurate to (°), this levels of precision to manual direct control has caused certain obstruction.

As ZL200410064896.6, portable satellite receiver is searched star method and apparatus fast, according to receiving ground latitude and receiving constellation, by preset reception antenna reflecting surface orientation and the luffing angle of manually tabling look-up, by centered by preset orientation ± 90 ° of spatial domains are divided into some fields of search, range searching one by one, until signal maximum locking orientation and pitching.This tradition is searched star method and apparatus and is had following problem: (1) utilizes mechanization design to the helical scanning of feasible region, spatial domain, and structure is comparatively complicated, and design cost is higher; (2) by preset reception antenna reflecting surface orientation and the luffing angle of manually tabling look-up, labor workload is larger, and intelligent degree is low, and angle calculation accuracy is not high enough; (3) in the process of locking satellite, only consider the angle of pitch and azimuth, do not consider the polarizing angle of receiver antenna, the oscillator that cannot guarantee to polarize is adjusted to the direction consistent with electromagnetic wave, easily occurs polarization interference, directly affect star accuracy, thereby affect satellite signal receiving effect.

ZL201210286953.X and for example, Portable narrow band satellite communication equipment and control method thereof, the local information of extracting according to GPS module, calculates local position with respect to azimuth and the angle of pitch of certain communication satellite; According to azimuth, the angle of pitch and polarizing angle, carry out coarse adjustment to star; Beacon receiver uses the first bandwidth judgement signal strength values, according to signal strength values fine tuning azimuth, the angle of pitch and polarizing angle, until signal strength values is maximum.There is following problem to star method in this: (1), in the measuring process of satellite-signal intensity, this need to use two bandwidth to star method, has the restriction of amount of bandwidth; (2) in the measuring process of satellite-signal intensity: first send a radiofrequency signal by antenna, and then receive through satellite and forward the radiofrequency signal of getting off.Because receiver antenna when the signal strength measurement has only completed coarse adjustment, not completely to satelloid, therefore when to satellite emission signal, can face star and disturb because angular deviation causes, directly affected the measuring accuracy of satellite-signal intensity.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of portable satellite receiver satellite quick lock in system high to star accuracy is provided, angle calculation module is according to wanting the position of locking satellite and receiver local position from the required azimuth of host computer coarse adjustment, the angle of pitch and polarizing angle, and high, the intelligent degree of counting accuracy is high, easy to use; Power display module shows the signal strength signal intensity in bandwidth in trim process always, shows that intuitively whether the result of fine setting operation is accurate, finely tunes easy to operate and speed is fast; Consider azimuth, the angle of pitch and polarizing angle, adjust the polarizing angle oscillator that makes to polarize and adjust to the direction consistent with electromagnetic wave, the signal strength signal intensity of oscillator induction is maximum, can avoid occurring that polarization disturbs, and makes reception best, higher to star accuracy; First detect the signal strength signal intensity of current reception, obtain progressive minimizing bandwidth after maximum point, there is no the restriction of amount of bandwidth, make user see more clearly; The signal receiving module descending beacon signal of reception satellite via satellite signal power computing module are realized the measurement of signal strength signal intensity, without by antenna transmission signal, can effectively avoid facing the impact that star disturbs, and make the measuring accuracy of satellite-signal intensity higher.

The object of the invention is to be achieved through the following technical solutions: a kind of portable satellite receiver satellite quick lock in system, comprises coarse adjustment module and fine setting module.

Described coarse adjustment module comprises:

For inputting and select to want the input module of locking satellite;

Locating module for location receiver geographical position;

For according to the angle calculation module of receiver geographical position and the required angle of pitch of selected satellite position calculation coarse adjustment, azimuth, polarizing angle;

Angle calculation module comprises angle of pitch calculating sub module, declinometer operator module and polarizing angle calculating sub module.

The connecting line of satellite receiver and fixed statellite is called demand line, demand line projection on the ground, and the camber line between satellite receiver and substar is called the rhumb line of satellite receiver to fixed statellite, and the definite plane of rhumb line and demand line is called azimuth plane.The Due South that azimuth refers to satellite receiver place warp, to the angle forming with azimuth plane in the direction of the clock, represents with ∠ MAN, and the angle of pitch refers to the rhumb line of satellite receiver and the angle of demand line.

Fig. 1 has provided the geometrical relationship between fixed statellite S and satellite receiver A.In figure, A represents satellite receiver, and S represents fixed statellite, and O represents earth the earth's core, B is the warp of satellite receiver A and the intersection point in equator, the intersection point C that the line of O and S is gone up is at the earth's surface called substar, and the camber line AC of ordering by A point and C on earth surface is called rhumb line, the tangent line that AN is AC, AM is the tangent line of AB, face OAS is azimuth, and D is the intersection point of tangent line AM and equatorial plane, and E is the intersection point of tangent line AN and equatorial plane.

If the longitude of satellite receiver A and latitude are respectively and θ ₁, fixed statellite longitude is difference of longitude below specifically provide the required azimuth φ of satellite receiver antenna alignment satellite _a, angle of pitch φ _ewith polarizing angle φ _jformulation process.

Azimuthal computational process is as follows:

By Fig. 1, can be obtained:

AD＝ODsinθ ₁；

${\tan \mathrm{\φ}}_a=\frac{\mathrm{DE}}{\mathrm{AD}};$

The azimuth that can draw satellite receiver antenna by above three formulas:

Utilize the azimuth that above formula is obtained to take Due South to trying to achieve as benchmark, in accordance with regulations, direct north all be take as benchmark in azimuth, the azimuth on historical facts or anecdotes border, except need to converting according to the accuracy relation of antenna and satellite and position, also will be transformed into the coordinate system that direct north is benchmark.

The computational process of the angle of pitch is as follows:

For obtaining the angle of pitch, be the parallel lines SF of EA, the extended line of OA and SF intersect at a F, known in right-angled triangle AFS by parallel relation:

${\tan \mathrm{\φ}}_e={\tan \mathrm{\φ}}_f=\frac{\mathrm{AF}}{\mathrm{FS}}=\frac{\mathrm{OF}-\mathrm{OA}}{\mathrm{FS}};$

Again:

OF＝OScosα＝(OC+CS)cosα；

FS＝OSsinα＝(OC+CS)sinα；

Therefore have:

${\tan \mathrm{\θ}}_e=\frac{(\mathrm{OC}+\mathrm{CS})\cos \mathrm{\α}-\mathrm{OA}}{(\mathrm{OC}+\mathrm{CS})\sin \mathrm{\α}}=\frac{(R+h)\cos \mathrm{\α}-R}{(R+h)\sin \mathrm{\α}}=\frac{{\cos \mathrm{\θ}}_1\cos \mathrm{\φ}-\frac{R}{R+h}}{\sin \mathrm{\α}};$

In above formula OA and OC be satellite receiver apart from the distance in earth the earth's core, with R, represent, get 6378 kilometers of earth mean radiuss; All geostationary satellites are all distributed in overhead, equator, and its height represents with h, gets 35860 kilometers, brings above formula into and obtains:

Therefore the angle of pitch:

The computational process of polarizing angle is as follows:

The electromagnetic wave of aerial radiation all polarizes, polarization of electromagnetic wave is to define according to electromagnetic wave direction of electric field intensity in communication process, if electromagnetic electric field intensity be projected in direction of propagation vertical plane on track be a straight line, be referred to as linear polarization; If electric field intensity projected footprint is circle or oval, be circular polarization or elliptical polarization, the polarization definition datum of satellite radiation polarization wave polarization and ground level reception antenna is different, and for Yi Ge satellite receiving earth station, the polarization of its antenna be take ground level as benchmark definition.The electric wave of electric field intensity plane and earth surface is horizontal polarization, and the narrow limit of feed rectangular waveguide mouth is perpendicular to ground.

When the longitude of satellite receiver is when longitude equates in-orbit with satellite, the electric field component of polarized wave just in time parallel (or vertical) in the ground level of satellite receiver, now polarizing angle is zero.As long as satellite receiver and satellite be not on a longitude, just there is an angle in electric field and ground level in the polarized wave that satellite transmission comes, and this angle is called polarizing angle.For the reception having reached, adjust outside the azimuth and the angle of pitch of receiver antenna, also should adjust according to the numerical value of polarizing angle the direction of feed rectangular waveguide mouth, the oscillator that makes to polarize is adjusted to the direction consistent with electromagnetic wave, the now polarization coupling polarization next with satellite transmission completely, the signal strength signal intensity of oscillator induction is maximum, and reception is best.Its polarizing angle of the satellite receiver of diverse geographic location is also different, and the required theoretical polarizing angle of satellite receiver antenna alignment satellite is:

Further, described step S103 completes after the angle of pitch, azimuth and the polarizing angle calculating of satellite with respect to portable satellite receiver, also comprises a step that is related to corrected azimuth according to portable satellite receiver and satellite longitude.

For angles of display result of calculation, guides user, manually adjust receiver angle to complete the angle display module of coarse adjustment;

Described fine setting module comprises:

For receiving the signal receiving module of the descending beacon signal of satellite;

For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to the descending beacon signal of received satellite and finding out the satellite-signal power computation module of maximum power point;

Satellite-signal power computation module adopts Split Radix FFT Algorithm:

If sequence x (n) length is N, the expression formula X of split-radix FFT (k) can be represented by the formula:

$\left\{\begin{array}{cc}X\left(2k\right)=\underset{n=0}{\overset{N/2-1}{\mathrm{\Σ}}}{x}_2\left(n\right)W_N^{2\mathrm{kn}}=\mathrm{DFT}\left[x_2\left(n\right)\right]& 0\≤k\≤N/2-1\\ X(4k+1)=\underset{n=0}{\overset{N/4-1}{\mathrm{\Σ}}}{x}_4^1\left(n\right)W_N^{4\mathrm{kn}}=\mathrm{DFT}\left[x_4^1\left(n\right)\right]& 0\≤k\≤N/4-1\\ X(4k+3)=\underset{n=0}{\overset{N/4-1}{\mathrm{\Σ}}}{x}_4^2\left(n\right)W_N^{4\mathrm{kn}}=\mathrm{DFT}\left[x_4^2\left(n\right)\right]& 0\≤k\≤N/4-1\end{array}\right.;$

Wherein,

$\left\{\begin{array}{cc}{x}_2\left(n\right)=x\left(n\right)+x(n+N/2)& 0\≤n\≤N/2-1\\ x_4^1\left(n\right)=[x\left(n\right)-\mathrm{jx}(n+N/4)-x(n+N/2)+\mathrm{jx}(n+3N/4)]W_N^n& 0\≤n\≤N/4-1\\ x_4^2\left(n\right)=[x\left(n\right)+\mathrm{jx}(n+N/4)-x(n+N/2)-\mathrm{jx}(n+3N/4)]W_N^n& 0\≤n\≤N/4-1\end{array}\right.$

And $W_N^n=e^{-j2\mathrm{\πn}/N}.$

For show in real time the power display module of satellite-signal power according to user's manual fine-tuning.

Power display module shows the signal strength signal intensity in bandwidth in trim process always, whether the result of demonstration fine setting operation directly perceived is accurate: if find in azimuth or angle of pitch adjustment process, the intensity of beacon frequency declines, anisotropy is adjusted in explanation, needs back adjustment; If intensity improves, direction is correct, continues to adjust to this direction; After intensity is raised to certain maximum, start to decline, this maximum is optimum orientation, and azimuth and the angle of pitch are fixed on to this direction.

Further, locating module comprises GPS locating module or electronic compass locating module.

Further, the visual end-user interface that input module is receiver.

Further, coarse adjustment module also comprises that one for after completing the angle of pitch, azimuth and polarizing angle and calculating in angle calculation module, is related to the correcting module of corrected azimuth according to receiver and satellite longitude.

The invention has the beneficial effects as follows:

1) adopt manual coarse adjustment mode to replace traditional mechanization coarse adjustment mode, easy to use, coarse adjustment speed is fast;

2) angle calculation module is according to position and the autonomous computer azimuth angle of receiver local position, the angle of pitch and the polarizing angle of wanting locking signal satellite, and counting accuracy is high, speed is fast, and intelligent degree is high, easy to use;

3) power display module shows the signal strength signal intensity in bandwidth in trim process in real time, shows that intuitively whether the result of fine setting operation is accurate, finely tunes easy to operate and speed is fast;

4) consider azimuth, the angle of pitch and polarizing angle, adjust the polarizing angle oscillator that makes to polarize and adjust to the direction consistent with electromagnetic wave, the signal strength signal intensity of oscillator induction is maximum, avoiding occurring that polarization disturbs, and makes reception best, higher to star accuracy;

5) first detect the signal strength signal intensity of current reception, obtain progressive minimizing bandwidth after maximum point, there is no the restriction of amount of bandwidth, make user see more clearly;

6) signal receiving module receive the descending beacon signal of satellite and via satellite signal power computing module realize the measurement of signal strength signal intensity, without by antenna transmission signal, can effectively avoid facing the impact that star disturbs, make the measuring accuracy of satellite-signal intensity higher;

7) angle calculation module completes after the angle of pitch, azimuth and the polarizing angle calculating of satellite with respect to receiver, according to the longitude of receiver and satellite, is related to corrected azimuth, contributes to further to improve satellite locking accuracy;

8) applied widely, not only applicable to portable receiver, can also be applicable to well PTT, quiet in the satellite reception machine equipment such as exceedingly high line;

9) by the visual terminal with data processing function, intuitively and promptly realize lock star, can greatly improve the accuracy of conventional portable receiver locking satellite signal, thereby effectively promote the communication reliability of satellite communication system.

Accompanying drawing explanation

Fig. 1 is the geometry schematic diagram of the computer azimuth angle of angle calculation module, the angle of pitch, polarizing angle;

Fig. 2 is structural representation block diagram of the present invention;

Fig. 3 is coarse adjustment module operation flow chart of the present invention;

Fig. 4 is that the present invention finely tunes module operation flow chart.

Embodiment

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.

As shown in Figure 2, a kind of portable satellite receiver satellite quick lock in system, comprises coarse adjustment module and fine setting module: wherein, described coarse adjustment module comprises:

For inputting and select to want the input module of locking satellite, the visual end-user interface that input module is receiver;

For the locating module in location receiver geographical position, locating module comprises GPS locating module or electronic compass locating module;

For according to the angle calculation module of receiver geographical position and the required angle of pitch of selected satellite position calculation coarse adjustment, azimuth, polarizing angle;

With for angles of display result of calculation, guides user, manually adjust receiver angle to complete the angle display module of coarse adjustment.

Described angle calculation module comprises angle of pitch calculating sub module, declinometer operator module and polarizing angle calculating sub module, and the computational process of each angle calculation submodule is as follows:

The connecting line of receiver and fixed statellite is called demand line, demand line projection on the ground, and the camber line between satellite receiver and substar is called the rhumb line of satellite receiver to fixed statellite, and the definite plane of rhumb line and demand line is called azimuth plane.The Due South that azimuth refers to satellite receiver place warp, to the angle forming with azimuth plane in the direction of the clock, represents with ∠ MAN, and the angle of pitch refers to the rhumb line of satellite receiver and the angle of demand line.

Fig. 1 has provided the geometrical relationship between fixed statellite S and satellite receiver A.In figure, A represents satellite receiver, and S represents fixed statellite, and O represents earth the earth's core, B is the warp of satellite receiver A and the intersection point in equator, the intersection point C that the line of O and S is gone up is at the earth's surface called substar, and the camber line AC of ordering by A point and C on earth surface is called rhumb line, the tangent line that AN is AC, AM is the tangent line of AB, face OAS is azimuth, and D is the intersection point of tangent line AM and equatorial plane, and E is the intersection point of tangent line AN and equatorial plane.

If the longitude of satellite receiver A and latitude are respectively and θ ₁, fixed statellite longitude is difference of longitude below specifically provide the required azimuth φ of satellite receiver antenna alignment satellite _a, angle of pitch φ _ewith polarizing angle φ _jformulation process.

The computational process of declinometer operator module is as follows:

By Fig. 1, can be obtained:

AD＝ODsinθ ₁；

${\tan \mathrm{\φ}}_a=\frac{\mathrm{DE}}{\mathrm{AD}};$

The azimuth that can draw satellite receiver antenna by above three formulas:

Utilize the azimuth that above formula is obtained to take Due South to trying to achieve as benchmark, in accordance with regulations, direct north all be take as benchmark in azimuth, the azimuth on historical facts or anecdotes border, except need to converting according to the accuracy relation of antenna and satellite and position, also will be transformed into the coordinate system that direct north is benchmark.

The computational process of angle of pitch calculating sub module is as follows:

For obtaining the angle of pitch, be the parallel lines SF of EA, the extended line of OA and SF intersect at a F, known in right-angled triangle AFS by parallel relation:

${\tan \mathrm{\φ}}_e={\tan \mathrm{\φ}}_f=\frac{\mathrm{AF}}{\mathrm{FS}}=\frac{\mathrm{OF}-\mathrm{OA}}{\mathrm{FS}};$

Again:

OF＝OScosα＝(OC+CS)cosα；

FS＝OSsinα＝(OC+CS)sinα；

Therefore have:

${\tan \mathrm{\θ}}_e=\frac{(\mathrm{OC}+\mathrm{CS})\cos \mathrm{\α}-\mathrm{OA}}{(\mathrm{OC}+\mathrm{CS})\sin \mathrm{\α}}=\frac{(R+h)\cos \mathrm{\α}-R}{(R+h)\sin \mathrm{\α}}=\frac{{\cos \mathrm{\θ}}_1\cos \mathrm{\φ}-\frac{R}{R+h}}{\sin \mathrm{\α}};$

In above formula OA and OC be satellite receiver apart from the distance in earth the earth's core, with R, represent, get 6378 kilometers of earth mean radiuss; All geostationary satellites are all distributed in overhead, equator, and its height represents with h, gets 35860 kilometers, brings above formula into and obtains:

Therefore the angle of pitch:

The computational process of polarizing angle calculating sub module is as follows:

The electromagnetic wave of aerial radiation all polarizes, polarization of electromagnetic wave is to define according to electromagnetic wave direction of electric field intensity in communication process, if electromagnetic electric field intensity be projected in direction of propagation vertical plane on track be a straight line, be referred to as linear polarization; If electric field intensity projected footprint is circle or oval, be circular polarization or elliptical polarization, the polarization definition datum of satellite radiation polarization wave polarization and ground level reception antenna is different, and for Yi Ge satellite receiving earth station, the polarization of its antenna be take ground level as benchmark definition.The electric wave of electric field intensity plane and earth surface is horizontal polarization, and the narrow limit of feed rectangular waveguide mouth is perpendicular to ground.

When the longitude of satellite receiver is when longitude equates in-orbit with satellite, the electric field component of polarized wave just in time parallel (or vertical) in the ground level of satellite receiver, now polarizing angle is zero.As long as satellite receiver and satellite be not on a longitude, just there is an angle in electric field and ground level in the polarized wave that satellite transmission comes, and this angle is called polarizing angle.For the reception having reached, adjust outside the azimuth and the angle of pitch of receiver antenna, also should adjust according to the numerical value of polarizing angle the direction of feed rectangular waveguide mouth, the oscillator that makes to polarize is adjusted to the direction consistent with electromagnetic wave, the now polarization coupling polarization next with satellite transmission completely, the signal strength signal intensity of oscillator induction is maximum, and reception is best.Its polarizing angle of the satellite receiver of diverse geographic location is also different, and the required theoretical polarizing angle of satellite receiver antenna alignment satellite is:

Further, coarse adjustment module also comprises that one for after completing the angle of pitch, azimuth and polarizing angle and calculating in angle calculation module, is related to the correcting module of corrected azimuth according to receiver and satellite longitude.

As shown in Figure 3, coarse adjustment module operation step is as follows:

S101: locating module utilizes positioner to determine position and the orientation of portable satellite receiver;

S102: the satellite of inputting and select wish locking by input module;

S103: according to the positional information of satellite and portable satellite receiver, calculate this satellite with respect to the angle of pitch, azimuth and the polarizing angle information of receiver by angle calculation module;

S104: manually adjust the angle of receiver according to each angle information, make the satellite of its rough alignment wish locking, complete coarse adjustment.

Described fine setting module comprises:

For receiving the signal receiving module of the descending beacon signal of satellite;

For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to the descending beacon signal of received satellite and finding out the satellite-signal power computation module of maximum power point;

With for show in real time the power display module of satellite-signal power according to user's manual fine-tuning.

Wherein, described satellite-signal power computation module adopts Split Radix FFT Algorithm:

If sequence x (n) length is N, the expression formula X of split-radix FFT (k) can be represented by the formula:

$\left\{\begin{array}{cc}X\left(2k\right)=\underset{n=0}{\overset{N/2-1}{\mathrm{\Σ}}}{x}_2\left(n\right)W_N^{2\mathrm{kn}}=\mathrm{DFT}\left[x_2\left(n\right)\right]& 0\≤k\≤N/2-1\\ X(4k+1)=\underset{n=0}{\overset{N/4-1}{\mathrm{\Σ}}}{x}_4^1\left(n\right)W_N^{4\mathrm{kn}}=\mathrm{DFT}\left[x_4^1\left(n\right)\right]& 0\≤k\≤N/4-1\\ X(4k+3)=\underset{n=0}{\overset{N/4-1}{\mathrm{\Σ}}}{x}_4^2\left(n\right)W_N^{4\mathrm{kn}}=\mathrm{DFT}\left[x_4^2\left(n\right)\right]& 0\≤k\≤N/4-1\end{array}\right.;$

Wherein,

$\left\{\begin{array}{cc}{x}_2\left(n\right)=x\left(n\right)+x(n+N/2)& 0\≤n\≤N/2-1\\ x_4^1\left(n\right)=[x\left(n\right)-\mathrm{jx}(n+N/4)-x(n+N/2)+\mathrm{jx}(n+3N/4)]W_N^n& 0\≤n\≤N/4-1\\ x_4^2\left(n\right)=[x\left(n\right)+\mathrm{jx}(n+N/4)-x(n+N/2)-\mathrm{jx}(n+3N/4)]W_N^n& 0\≤n\≤N/4-1\end{array}\right.$

And $W_N^n=e^{-j2\mathrm{\πn}/N}.$

Described power display module shows the signal strength signal intensity in bandwidth in trim process always, whether the result of demonstration fine setting operation directly perceived is accurate: if find in azimuth or angle of pitch adjustment process, the intensity of beacon frequency declines, anisotropy is adjusted in explanation, needs back adjustment; If intensity improves, direction is correct, continues to adjust to this direction; After intensity is raised to certain maximum, start to decline, this maximum is optimum orientation, and azimuth and the angle of pitch are fixed on to this direction.

As shown in Figure 4, fine setting module operation step is as follows:

S201: on coarse adjustment basis, signal receiving module receives the descending beacon signal of satellite, and carries out the satellite-signal power calculation in certain BREATHABLE BANDWIDTH by satellite-signal power computation module;

S202: the maximum power point that draws satellite-signal;

S203: the angle of pitch and the azimuth of fine setting portable satellite receiver under the power indication of power display module (visual terminal), make it to aim at this maximum power point;

S204: fine setting polarizing angle is also observed the maximum power point of visual terminal, makes prominent polarizing angle in selected trim process, completes fine setting.

Claims (3)

1. a portable satellite receiver satellite quick lock in system, comprises coarse adjustment module and fine setting module, it is characterized in that:

Described coarse adjustment module comprises:

For inputting and select to want the input module of locking satellite;

Locating module for location receiver geographical position;

For according to the angle calculation module of receiver geographical position and the required angle of pitch of selected satellite position calculation coarse adjustment, azimuth, polarizing angle;

For angles of display result of calculation, guides user, manually adjust receiver angle to complete the angle display module of coarse adjustment;

Described fine setting module comprises:

For receiving the signal receiving module of the descending beacon signal of satellite;

For carrying out satellite-signal power calculation in certain BREATHABLE BANDWIDTH according to the descending beacon signal of received satellite and finding out the satellite-signal power computation module of maximum power point;

For show in real time the power display module of satellite-signal power according to user's manual fine-tuning.

2. a kind of portable satellite receiver satellite quick lock in system according to claim 1, is characterized in that: described locating module comprises GPS locating module or electronic compass locating module.

3. a kind of portable satellite receiver satellite quick lock in system according to claim 1, it is characterized in that: described coarse adjustment module also comprises that one for after completing the angle of pitch, azimuth and polarizing angle and calculating in angle calculation module, according to receiver and satellite longitude, be related to the correcting module of corrected azimuth.