CN105591686A - Adaptive anti-interference satellite-aiming method for mobile satellite communication system - Google Patents
Adaptive anti-interference satellite-aiming method for mobile satellite communication system Download PDFInfo
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- CN105591686A CN105591686A CN201511017657.XA CN201511017657A CN105591686A CN 105591686 A CN105591686 A CN 105591686A CN 201511017657 A CN201511017657 A CN 201511017657A CN 105591686 A CN105591686 A CN 105591686A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
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Abstract
The invention discloses an adaptive anti-interference satellite-aiming method for a mobile satellite communication system. The mobile satellite communication system automatically acquires beacon bottom noises of the current place, dynamic tracking of a pitch angle of an antenna is realized via a heading attitude reference module fixedly connected with an antenna surface, one-dimensional scanning is performed via an azimuth axis of the antenna, differential determination is then performed, the maximum value of the automatic gain control voltage and the azimuth Euler angle of the moment appearing the maximum value are recorded, whether an error of the Euler angle is in the range is confirmed via no less than two times of comparison, and if the error is in the range, the satellite-aiming azimuth is given via the angle dichotomy. According to the method, a brand-new satellite-aiming method is adopted, the method is simple and easy, the cost is low, the reliability, the adaptability, and the anti-interference capability are high, the satellite-aiming speed is fast, and the accuracy is high.
Description
Technical field
The invention belongs to mobile satellite communication field, be specifically related to a kind of self adaptation anti-interference for mobile satellite communication system to star method.
Background technology
For mobile satellite communication system (hereinafter referred communication in moving), realizing is its follow-up basis that keeps antenna surface real-time stabilization tracking target satellite under carrier mobile status to star fast and accurately. Because communication in moving is often operated in motor-driven, emergent occasion, surrounding environment is comparatively complicated, and application site is unfixing, and satellite resource is unfixing, has therefore proposed higher technical requirement to searching star process. Analyze existing commercial communication in moving and search star scheme, substantially can be divided into following two kinds:
The first, mainly, by the GPS connecting firmly with carrier, obtains the absolute geographical coordinate of carrier and orientation after start, then according to target satellite parameter directly by the angle of pitch of antenna and azimuthal movement near angle on target, then realize star by acquisition beacon. This method need to be used differential GPS, or could obtain local azimuth by single GPS after wait carrier movement, although higher to the star degree of accuracy, searching the star time depends on that GPS provides the time of information, often can be for a few minutes, this will affect the use of contingency procedure greatly.
The second, searches star by Radio Beacon with to star thresholding, and this is also the scheme of most of miniaturized systems. According to the beacon level intensity of different satellites, manually arrange different from star thresholding by communication equipment. After start, make antenna movement arrive the star angle of pitch, then start orientation blind sweeping at a slow speed, after beacon level reaches setting value, stop azimuth axis motion, complete star. This method is simple, be easy to realize, but shortcoming also has a lot, and the first, need manually debug and set in advance the beacon level of typing multi-satellite, and beacon level is along with the difference of place to use also can be slightly variant, this gives in use and has brought very large trouble; The second, fixing level threshold makes anti-interference poor, once antenna has other reflecting surface or signal source (such as there are multiple portable stations in emergency communication place) around, can cause beacon level to obscure, thereby causes the generation of mistake to star phenomenon.
Summary of the invention
Goal of the invention: the problem existing for prior art, the invention provides one fast to star speed, there is the self adaptation anti-interference for mobile satellite communication system of high accuracy and reliability to star method.
Summary of the invention: the invention provides a kind of self adaptation anti-interference for mobile satellite communication system to star method, at the bottom of the automatic beacon that gathers current place of mobile satellite communication system, make an uproar, by the boat appearance referrer module (hereinafter referred connecting firmly with antenna surface, AHRS) angle of pitch of realizing antenna is dynamically followed the tracks of, carry out one-dimensional scanning by the azimuth axis of antenna simultaneously, judge again and record the maximum and the orientation Eulerian angles that occur the maximum moment of AGC voltage (hereinafter referred AGC voltage) by difference, be no less than the comparison of twice, confirm that Eulerian angles errors is whether within scope, if provide star azimuth by angle dichotomy within scope.
Further, provided by the invention star method is comprised the following steps:
Step 1: after mobile satellite communication system is started working, the pitch axis of control antenna does elevating movement until top is spacing, realize antenna surface towards sky, then the azimuth axis of control antenna rotates, and the average voltage of the AGC voltage in during gathering azimuth axis and rotating is as the end voltage of making an uproar;
Step 2: according to the longitude of target satellite, polarization mode, and current geography information, calculate star polarizing angle and the angle of pitch;
Step 3: start the polarization motor in mobile satellite communication system, make antenna movement to calculated polarizing angle; Start pitching motor, make antenna movement to the angle of pitch calculating in step 2, and the Eulerian angles of the boat appearance referrer module output that connects firmly of utilization and antenna surface are carried out the tracking maintenance of the angle of pitch;
Step 4: start the azimuth-drive motor in mobile satellite communication system, according to the azimuth axis of inceptive direction rotary antenna, scanning one is enclosed, and gathers and record the maximum MAX_AGC of the central AGC voltage of a circle;
Step 5: the azimuth axis of mobile satellite communication system control antenna rotates and scan a circle according to the direction contrary with inceptive direction, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 4 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the first time1；
Step 6: the azimuth axis of mobile satellite communication system control antenna is according to rotating and scan a circle with the direction that in step 5, the azimuth axis direction of motion is contrary, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 5 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the second time2；
Step 7: judgement | A1-A2| value, if | A1-A2| < B, think to star success, star angle is taken as to A1And A2Mid point, system open search star program enter follow the tracks of servo-actuated; If B < | A1-A2| < 2B, gets new A1=（A1+A2)/2, then proceed step 6, and the number of turns of writing scan, if back and forth the number of turns exceedes maximum set value, re-start the scanning of step 4; If | A1-A2| > 2B, re-start the scanning of step 4, wherein B represents Eulerian angles error range.
Further, in described step 1, the azimuth axis of control antenna rotated in 10 seconds.
The maximum MAX_AGC of the AGC voltage collecting in the AGC voltage further, collecting in described step 5 and step 6 and step 4 differs while being less than 1.5dB and repeatedly confirms; When the maximum MAX_AGC of the AGC voltage collecting in the current AGC voltage collecting for continuous 5 times and step 4 differs while being less than 1.5dB, record azimuth now.
Further, in described step 7, Euler's angle error scope B is 6 ~ 10 degree.
Further, in described step 7, back and forth the maximum set value of the number of turns is 5.
Operation principle: method provided by the invention does not arrange fixed threshold, because by pitching, control separates with orientation, aim at maintenance by pitching, and rotational orientation finds the MAX_AGC of local institute to satellite, then by dichotomy oppositely the mode of confirmation find this to star orientation.
Beneficial effect: compared with prior art, the present invention adopts a kind of brand-new to star method, simple, with low cost, has reliability, adaptivity and the antijamming capability of height, and fast to star speed, accuracy is high.
Brief description of the drawings
Fig. 1 is workflow diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of self adaptation anti-interference for mobile satellite communication system to star method, specifically comprise the following steps:
Step 1: after mobile satellite communication system is started working, the pitch axis of control antenna does elevating movement until top is spacing, realize antenna surface towards sky, then the azimuth axis of control antenna rotates, and the average voltage of the AGC voltage in during gathering azimuth axis and rotating is as the end voltage of making an uproar. Wherein, mobile satellite communication system is three axle communication in moving, the sports bag of antenna is containing orientation, pitching, three axles of polarization, realize isolation carrier movement by controlling the motion of these three axles, moment keeps the wave beam of tracking satellite, connects firmly an AHRS module and measure in real time azimuth, the angle of pitch and the polarizing angle of antenna on antenna surface. In the time that system is started working, the pitch axis of antenna can do elevating movement, can touch a limit switch when pitch axis during to top, makes antenna surface towards sky. The azimuth axis of control antenna rotates generally just passable within 10 seconds, and azimuth axis rotates on one side, gathers AGC voltage on one side.
Step 2: according to the longitude of target satellite, polarization mode, and current geography information, calculate star polarizing angle and the angle of pitch. Wherein current geography information can be that system GPS or the Big Dipper provide.
Step 3: start the polarization motor in mobile satellite communication system, make antenna movement to calculated polarizing angle; Start pitching motor, make antenna movement to the angle of pitch calculating in step 2, and the Eulerian angles of the boat appearance referrer module output that connects firmly of utilization and antenna surface are carried out the tracking maintenance of the angle of pitch.
Step 4: start the azimuth-drive motor in mobile satellite communication system, according to the azimuth axis of inceptive direction rotary antenna, scanning one is enclosed, and gathers and record the maximum MAX_AGC of the central AGC voltage of a circle.
Step 5: the azimuth axis of mobile satellite communication system control antenna rotates and scan a circle according to the direction contrary with inceptive direction, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 4 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the first time1。
Step 6: the azimuth axis of mobile satellite communication system control antenna is according to rotating and scan a circle with the direction that in step 5, the azimuth axis direction of motion is contrary, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 5 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the second time2。
Wherein, because the maximum MAX_AGC of AGC voltage can have slight variations along with the power of satellite beacon, weather heat radiation situation, so differing while being less than 1.5dB, the maximum MAX_AGC of the AGC voltage collecting in the AGC voltage collecting in step 5 and step 6 and step 4 repeatedly confirms; When continuous acquisition is to current AGC voltage > (MAX_AGC-1.5dB) exceed after 5 times, confirm successfully, record azimuth now.
Step 7: judgement | A1-A2| value, if | A1-A2| < B, think to star success, star angle is taken as to A1And A2Mid point, system open search star program enter follow the tracks of servo-actuated; If B < | A1-A2| < 2B, gets new A1=（A1+A2)/2, then proceed step 6, and the number of turns of writing scan, if back and forth the number of turns exceedes maximum set value, re-start the scanning of step 4; If | A1-A2| > 2B, re-start the scanning of step 4, wherein B represents Eulerian angles error range, and in the present embodiment, Euler's angle error scope B is 6 ~ 10 degree, and Eulerian angles error range B depends on antenna beamwidth, the drift velocity of AHRS module, dynamic accuracy. Different antennas, different AHRS, need to arrange different numerical value. Antenna beam is wider, AHRS drift velocity is larger, dynamic accuracy is lower, and the setting of B is larger. Back and forth the maximum set value of the number of turns is 5.
Existing existing communication in moving on the market all will arrange according to satellite fixing to star thresholding, and this makes debug process comparatively loaded down with trivial details. Due to around have multiple portable stations, the reflection of multiple large antenna surfaces, reflected beam direction is a lot, often cause star mistake, to the satellite-signal to reflecting back, AGC voltage is also very high, and cannot proper communication, just there is not the phenomenon of mistake to star after adopting method provided by the invention. Speed to star also effectively raises.
Claims (6)
1. the self adaptation anti-interference for mobile satellite communication system is to star method, it is characterized in that: mobile satellite communication system is made an uproar at the bottom of automatically gathering the beacon in current place, realize the angle of pitch of antenna dynamically follows the tracks of by the boat appearance referrer module connecting firmly with antenna surface, carry out one-dimensional scanning by the azimuth axis of antenna simultaneously, judge again and record the maximum and the orientation Eulerian angles that occur the maximum moment of AGC voltage by difference, be no less than the comparison of twice, confirm that Eulerian angles errors is whether within scope, if provide star azimuth by angle dichotomy within scope.
2. the self adaptation anti-interference for mobile satellite communication system according to claim 1, to star method, is characterized in that: comprise the following steps:
Step 1: after mobile satellite communication system is started working, the pitch axis of control antenna does elevating movement until top is spacing, realize antenna surface towards sky, then the azimuth axis of control antenna rotates, and the average voltage of the AGC voltage in during gathering azimuth axis and rotating is as the end voltage of making an uproar;
Step 2: according to the longitude of target satellite, polarization mode, and current geography information, calculate star polarizing angle and the angle of pitch;
Step 3: start the polarization motor in mobile satellite communication system, make antenna movement to calculated polarizing angle; Start pitching motor, make antenna movement to the calculated angle of pitch, and the Eulerian angles of the boat appearance referrer module output that connects firmly of utilization and antenna surface are carried out the tracking maintenance of the angle of pitch;
Step 4: start the azimuth-drive motor in mobile satellite communication system, according to the azimuth axis of inceptive direction rotary antenna, scanning one is enclosed, and gathers and record the maximum MAX_AGC of the central AGC voltage of a circle;
Step 5: the azimuth axis of mobile satellite communication system control antenna rotates and scan a circle according to the direction contrary with inceptive direction, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 4 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the first time1；
Step 6: the azimuth axis of mobile satellite communication system control antenna is according to rotating and scan a circle with the direction that in step 5, the azimuth axis direction of motion is contrary, gather and record the central AGC voltage of a circle, after collecting that the maximum MAX_AGC of the AGC voltage collecting in AGC voltage and step 5 is close and repeatedly confirming, record azimuth is now azimuth A when maximum occurs for the second time2；
Step 7: judgement | A1-A2| value, if | A1-A2| < B, think to star success, star angle is taken as to A1And A2Mid point, system open search star program enter follow the tracks of servo-actuated; If B < | A1-A2| < 2B, gets new A1=（A1+A2)/2, then proceed step 6, and the number of turns of writing scan, if back and forth the number of turns exceedes maximum set value, re-start the scanning of step 4; If | A1-A2| > 2B, re-start the scanning of step 4, wherein B represents Eulerian angles error range.
3. the self adaptation anti-interference for mobile satellite communication system according to claim 2, to star method, is characterized in that: in described step 1, the azimuth axis of control antenna rotated in 10 seconds.
4. the self adaptation anti-interference for mobile satellite communication system according to claim 2, to star method, is characterized in that: the maximum MAX_AGC of the AGC voltage collecting in the AGC voltage collecting in described step 5 and step 6 and step 4 differs while being less than 1.5dB and repeatedly confirms; When the maximum MAX_AGC of the AGC voltage collecting in the current AGC voltage collecting for continuous 5 times and step 4 differs while being less than 1.5dB, record azimuth now.
5. the self adaptation anti-interference for mobile satellite communication system according to claim 2, to star method, is characterized in that: in described step 7, Euler's angle error scope B is 6 ~ 10 degree.
6. the self adaptation anti-interference for mobile satellite communication system according to claim 2, to star method, is characterized in that: in described step 7, back and forth the maximum set value of the number of turns is 5.
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Cited By (4)
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| CN108449098A (en) * | 2018-03-22 | 2018-08-24 | 京东方科技集团股份有限公司 | Signal acceptance method and device |
| CN108493609A (en) * | 2018-03-16 | 2018-09-04 | 北京爱科迪通信技术股份有限公司 | A kind of Ka wave band antennas star searching system and method |
| CN109921844A (en) * | 2019-04-03 | 2019-06-21 | 天通盛邦通信科技（苏州）有限公司 | A kind of communication in moving searches the update method of star thresholding and to star method |
| CN110570711A (en) * | 2019-09-11 | 2019-12-13 | 江苏君知仕智能科技有限公司 | satellite communication simulation training system and satellite alignment strategy thereof |
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