CN107275784B - Satellite signal receiving device and antenna field pattern adjusting method thereof - Google Patents
Satellite signal receiving device and antenna field pattern adjusting method thereof Download PDFInfo
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- CN107275784B CN107275784B CN201610210183.9A CN201610210183A CN107275784B CN 107275784 B CN107275784 B CN 107275784B CN 201610210183 A CN201610210183 A CN 201610210183A CN 107275784 B CN107275784 B CN 107275784B
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- 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
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Abstract
The invention relates to a satellite signal receiving device and an antenna field pattern adjusting method thereof. The antenna array comprises a main antenna and at least one field type adjusting antenna, wherein the main antenna is used for radiating the antenna field type, and the field type adjusting antenna is used for coupling the antenna field type so as to adjust the angle of the antenna field type. The control unit is coupled with the pattern adjusting antenna and used for calculating the average intensity of satellite signals of a plurality of target satellites. By using the satellite signal receiving device and the antenna pattern adjusting method thereof, the coupling relation between the main antenna and the plurality of pattern adjusting antennas is adjusted to adjust the angle of the antenna pattern, so that the average satellite signal intensity of the target satellite received by the antenna array is higher than a first preset intensity, and the receiving quality of the antenna of the satellite signal receiving device is effectively ensured.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to an antenna device, and more particularly, to a satellite signal receiving device and an antenna pattern adjusting method thereof.
[ background of the invention ]
With the progress of Satellite technology, technologies combining space satellites and communication technologies have been developed vigorously in the civilian market, such as Global Positioning System (GPS) and Global Navigation Satellite System (GNSS), which are navigation systems combining satellites and wireless technologies, and can provide users with accurate positioning, speed and time information. For example, a vehicle or a ship in motion can exactly determine the destination arrival time and the destination arrival path through a GPS; the ambulance can also effectively execute rescue tasks in an emergency; the driver of the automobile can know the current position and the destination of the current position through the electronic map.
However, since the position of the satellite in the sky varies with time, if the antenna for receiving the satellite signal receives the satellite signal with a fixed pattern, the pattern of the antenna is no longer the best pattern for receiving the satellite signal in some time periods, and the reception quality of the antenna is degraded.
[ summary of the invention ]
The invention provides a satellite signal receiving device and an antenna pattern adjusting method thereof, which can effectively ensure the antenna receiving quality of the satellite signal receiving device.
The satellite signal receiving device comprises an antenna array and a control unit. The antenna array is used for receiving satellite signals of a plurality of satellites and comprises a main antenna and at least one pattern adjusting antenna, wherein the main antenna is used for radiating an antenna pattern, and the pattern adjusting antenna is used for coupling the antenna pattern so as to adjust the angle of the antenna pattern. The control unit is coupled with the field type adjusting antenna, calculates the average intensity of satellite signals of a plurality of target satellites, judges whether the average intensity is lower than a first preset intensity, and adjusts the coupling relation between the main antenna and the field type adjusting antenna if the average intensity is lower than the first preset intensity so as to adjust the angle of the antenna field type and enable the average satellite signal intensity of the target satellites received by the antenna array to be higher than the first preset intensity.
In an embodiment of the invention, the control unit further selects a plurality of candidate satellites from the satellites according to the threshold strength, and calculates an average elevation angle of the candidate satellites.
In an embodiment of the invention, the control unit further calculates an average intensity of the satellite signals of the satellites, and adds a second preset intensity to the average intensity of the satellite signals of the satellites to obtain the threshold intensity.
In an embodiment of the invention, the control unit further determines whether the average elevation angle is smaller than a threshold angle, and does not adjust the angle of the antenna pattern if the average elevation angle is not smaller than the threshold angle.
In an embodiment of the invention, the threshold angle is 60 degrees.
In an embodiment of the present invention, if the average elevation angle is smaller than the threshold angle, the control unit selects a satellite signal intensity of a satellite with a satellite signal intensity N greater than the satellite signal intensity in the candidate satellites as a reference intensity, and determines whether the reference intensity is higher than the threshold intensity.
In an embodiment of the invention, if the average intensity is not lower than the first predetermined intensity, the adjustment of the coupling relationship between the main antenna and the pattern adjustment antenna is stopped, and the average intensity of the satellite signal of the satellite is continuously calculated after a predetermined period of time.
In an embodiment of the invention, the control unit further determines whether the average intensities corresponding to the adjusted antenna patterns are all lower than a first preset intensity, and if the average intensities corresponding to the adjusted antenna patterns are all lower than the first preset intensity, the control unit stops adjusting the coupling relationship between the main antenna and the pattern-adjusted antennas, and continues to calculate the average intensity of the satellite signal of the satellite after a preset time period.
In an embodiment of the invention, the satellite signal receiving apparatus further includes a plurality of switches respectively coupled between the corresponding field adjusting antennas and the ground, and the control unit controls the on-state of the switches to adjust the coupling relationship between the main antenna and the field adjusting antennas.
The antenna field pattern adjusting method of the present invention includes the following steps. The average strength of the satellite signals of the plurality of target satellites is calculated. And judging whether the average intensity is lower than a first preset intensity. If the average intensity is lower than the first preset intensity, the coupling relation between the main antenna and the field pattern adjusting antenna is adjusted to adjust the angle of the antenna field pattern, so that the average satellite signal intensity of the target satellite received by the antenna array is higher than the first preset intensity.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. And selecting a plurality of candidate satellites with satellite signal intensity higher than the threshold intensity from the plurality of satellites according to the threshold intensity. An average elevation angle of the candidate satellite relative to the pattern of the antenna array is calculated.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. The average strength of the satellite signals of the satellites is calculated. And adding the average intensity of the satellite signals of the satellites to a second preset intensity to obtain the threshold intensity.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. And judging whether the average elevation angle is smaller than the threshold angle. If the average elevation angle is not smaller than the threshold angle, the angle of the antenna pattern is not adjusted.
In an embodiment of the invention, the threshold angle is 60 degrees.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. And if the average elevation angle is smaller than the threshold angle, selecting the satellite signal intensity of the satellite with the satellite signal intensity Nth highest in the candidate satellites as the reference intensity. And judging whether the reference intensity is higher than the threshold intensity, and if the reference intensity is higher than the threshold intensity, selecting a satellite with the satellite signal intensity from the maximum satellite signal intensity to the Nth satellite signal intensity in the candidate satellites as a target satellite, wherein N is a positive integer.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. If the average intensity is not lower than the first preset intensity, stopping adjusting the coupling relation between the main antenna and the field pattern adjusting antenna. And judging whether a preset time period passes or not. And if a preset time period passes, continuously calculating the average intensity of the satellite signals of the satellites.
In an embodiment of the invention, the method for adjusting the antenna pattern further includes the following steps. And judging whether the average intensity corresponding to each antenna field type after adjustment is lower than a first preset intensity. If the average intensity corresponding to each antenna field type after adjustment is lower than the first preset intensity, the adjustment of the coupling relation between the main antenna and the field type adjustment antenna is stopped. And judging whether a preset time period passes or not. And if a preset time period passes, continuously calculating the average intensity of the satellite signals of the satellites.
In an embodiment of the invention, in the step of adjusting the coupling relationship between the main antenna and the field adjusting antenna, the coupling relationship between the field adjusting antenna and the ground is controlled to adjust the coupling relationship between the main antenna and the field adjusting antenna.
Based on the above, the embodiments of the present invention adjust the coupling relationship between the main antenna and the plurality of pattern adjustment antennas to adjust the angle of the antenna pattern, so that the average satellite signal strength of the target satellite received by the antenna array is higher than the first predetermined strength, thereby effectively ensuring the reception quality of the antenna of the satellite signal receiving apparatus.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a satellite signal receiving apparatus according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an antenna array according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a satellite distribution according to an embodiment of the invention.
FIG. 4 is a schematic diagram of average elevation angles of candidate satellites according to an embodiment of the invention.
Fig. 5 is a flowchart illustrating an antenna pattern adjusting method according to an embodiment of the invention.
Fig. 6 and 7 are schematic flowcharts of an antenna pattern adjusting method according to another embodiment of the invention.
[ detailed description ] embodiments
Fig. 1 is a schematic diagram of a satellite signal receiving apparatus according to an embodiment of the invention, please refer to fig. 1. The satellite signal receiving apparatus 100 includes an antenna array 102 and a control unit 104, wherein the antenna array 102 includes a main antenna 106, a pattern adjusting antenna 108 and a pattern adjusting antenna 110, and the pattern adjusting antenna 108 and the pattern adjusting antenna 110 are coupled to the control unit 104. The antenna array 102 is configured to receive satellite signals of a plurality of satellites, wherein the main antenna 106 of the antenna array 102 is configured to form an antenna pattern, and the pattern adjusting antenna 108 and the pattern adjusting antenna 110 are configured to adjust an angle of the antenna pattern radiated by the main antenna 106. Further, the control unit 104 may calculate an average intensity of satellite signals of a plurality of specific target satellites, and determine whether the average intensity of satellite signals of the target satellites is lower than a first predetermined intensity (e.g., 42dB, but not limited thereto). If the average satellite signal strength of the target satellites is lower than the first predetermined strength, the control unit 104 may adjust the coupling relationship between the main antenna 106 and the pattern adjusting antennas 108 and 110 to adjust the angle of the antenna pattern of the main antenna 106, so that the average satellite signal strength of the target satellites received by the antenna array 102 is higher than the first predetermined strength to ensure the signal receiving quality of the antenna array of the satellite signal receiving apparatus 100.
It should be noted that the number of the field adjusting antennas in the antenna array is not limited to the embodiment shown in fig. 1, and in other embodiments, the number of the field adjusting antennas may be adjusted according to actual requirements. For example, fig. 2 is a schematic diagram of an antenna array according to an embodiment of the invention. In the present embodiment, the antenna array 200 includes 4 field adjusting antennas 204-1, 204-2, 204-3, and 204-4, one end of each of the field adjusting antennas 204-1, 204-2, 204-3, and 204-4 is coupled to ground through switches SW1, SW2, SW3, and SW4, respectively, and the other end of each of the field adjusting antennas 204-1, 204-2, 204-3, and 204-4 is an open end. In addition, the main antenna 202 of the antenna array 200 includes a helical antenna 202-1 and a central ground line 202-2, wherein the central ground line 202-2 is a straight line and has a ground point G1 at one end and an open end at the other end. The spiral antenna 202-1 has a feed point F1 at one end and an open end at the other end, and the spiral antenna 202-1 surrounds the central ground line 202-1 along the central ground line 202-2 from the ground point G1 of the central ground line 202-2 toward the open end of the central ground line 202-2, such that the open end of the spiral antenna 202-1 is adjacent to the open end of the central ground line 202-1. In addition, the control unit 104 is coupled to the field adjustment antennas 204-1, 204-2, 204-3 and 204-4 through switches SW1, SW2, SW3 and SW4, respectively, and the control unit 104 can control the on states of the switches SW1, SW2, SW3 and SW4 to adjust the coupling relationship between the main antenna 202 and the field adjustment antennas 204-1, 204-2, 204-3 and 204-4. For example, the control unit 104 may turn on the switch SW4 and turn off the switches SW1, SW2 and SW3 to deflect the antenna pattern of the main antenna 202 toward the direction of the pattern adjusting antenna 204-4.
It is noted that the main antenna 202 and the field adjustment antennas 204-1, 204-2, 204-3, and 204-4 of the present embodiment are only exemplary embodiments, and the implementation of the main antenna 202 and the field adjustment antennas 204-1, 204-2, 204-3, and 204-4 is not limited to the present embodiment.
Further, regarding the selection of the target satellite. The control unit 104 may compare the satellite strength of each satellite distributed in the sky with the threshold strength, and select a plurality of candidate satellites from the satellites, wherein the satellite signal strength of the candidate satellites is higher than the threshold strength. The threshold intensity may be obtained, for example, by the control unit 104 calculating an average intensity of satellite signals of all satellites in the sky and adding a second predetermined intensity, wherein the second predetermined intensity may be, for example, 0.5dB, but not limited thereto, and the setting manner of the threshold intensity is also not limited thereto. In addition, the control unit 104 calculates an average azimuth and an average elevation of the candidate satellites, wherein the average azimuth and the average elevation can be used to estimate an adjustment angle of the antenna pattern, and the average elevation can be used to determine whether to adjust the antenna pattern. For example, the control unit 104 may determine whether the average elevation angle is smaller than a threshold angle, and if the average elevation angle is not smaller than the threshold angle, the angle of the antenna pattern is not adjusted, and conversely, if the average elevation angle is smaller than the threshold angle, the angle of the antenna pattern is adjusted.
For example, fig. 3 is a schematic distribution diagram of satellites according to an embodiment of the invention, in which an antenna array for receiving satellite signals is located at a center of a circle, and the antenna array can receive satellite signals from satellites 1 to 12. Wherein the satellite closer to the center of the circle in fig. 3 corresponds to a larger elevation angle, for example, the elevation angle corresponding to the satellite 6 is larger than the elevation angle corresponding to the satellite 4, and the elevation angle is equal to 90 ° when the satellite is located at the center of the circle, and in addition, E, N, W, S represents different azimuths, i.e., east, north, west, south, etc., respectively. The control unit 104 can calculate the average intensity of the satellite signals of the satellites 1-12 in the sky, and add a second preset intensity to the average intensity to obtain a threshold intensity. For example, the satellite signal strength received by the satellite signal receiving apparatus 100 in the embodiment of fig. 3 can be as shown in the following list one:
watch 1
The elevation angle is the elevation angle of the satellite relative to the position of the observer (i.e., the center of the circle) when facing the satellite, and the azimuth angle is calculated with respect to north (i.e., 0 degrees when the satellite is in north). The control unit 104 compares the satellite intensity of each satellite with a threshold intensity (e.g., set to 36dB, but not limited thereto), and selects a candidate satellite with a satellite signal intensity higher than the threshold intensity from the satellites 1-12, such as satellites 3, 6, 7, 9, 10, and 11. The control unit 104 can calculate the average azimuth angle and the average elevation angle of the selected candidate satellite ( satellites 3, 6, 7, 9, 10, 11) and determine whether to adjust the pattern of the antenna array. For example, fig. 4 is a schematic diagram of the average elevation angle of a candidate satellite according to an embodiment of the invention, wherein the xy plane is a plane in which the antenna array 102 is located, and the Z axis can be regarded as a normal of the plane in which the antenna array is located. In the embodiment shown in fig. 3, the average elevation angle of the candidate satellite is 45 °, that is, the average angle between the candidate satellite and the xy plane is 45 degrees (or the complementary angle between the candidate satellite and the Z axis is 45 degrees), and assuming that the threshold angle is 60 °, the control unit 104 needs to perform the angle adjustment of the antenna pattern because the average elevation angle is smaller than the threshold angle.
When the angle of the antenna pattern needs to be adjusted, the control unit 104 selects the satellite signal strength of the satellite with the highest satellite signal strength among the candidate satellites as the reference strength, where N is a positive integer. The control unit 104 determines whether the reference strength is higher than the threshold strength, and selects a satellite with the satellite signal strength from the largest satellite signal strength to the nth satellite signal strength among the candidate satellites as the target satellite if the reference strength is higher than the threshold strength, that is, selects the first N satellites with the satellite signal strength higher than the target satellite signal strength. For example, in fig. 3, if the satellites 6, 7, 10, and 11 are the first 4 satellites with higher satellite signal strength (i.e. N is set to be 4, but not limited thereto), the satellites 6, 7, 10, and 11 can be selected as the target satellites. On the contrary, if the reference strength is not higher than the threshold strength, the number of satellites with larger signal strength is too small to effectively improve the receiving quality of the antenna. At this time, the control unit 104 may recalculate the threshold strength to reselect the candidate satellites to ensure that the number of satellites with higher satellite signal strength is enough, and then use these satellites as target satellites to perform the angle adjustment of the antenna pattern.
If the control unit 104 knows the antenna pattern angle corresponding to the coupling relationship between the main antenna and the pattern adjusting antenna, the control unit 104 can adjust the coupling relationship between the main antenna and the pattern adjusting antenna directly according to the calculated average azimuth angle and average elevation angle, so as to adjust the pattern of the antenna array to the angle corresponding to the average azimuth angle and average elevation angle. If the control unit 104 does not record the antenna pattern angle corresponding to the coupling relationship between the main antenna and the pattern adjusting antenna, the control unit 104 can alternately switch the coupling relationship between the main antenna and the pattern adjusting antenna to find the most suitable antenna pattern angle, so that the satellite signal strength meets the condition. For example, in the embodiment of fig. 2, the switches SW1 to SW4 may be turned on alternately to find the most suitable antenna pattern angle. In the process of turning on the switches SW 1-SW 4 in turn, if the average strength of the satellite signals of the target satellite is higher than the first preset strength, the switches SW 1-SW 4 are stopped from being switched continuously, that is, the coupling relationship between the main antenna and the field type adjusting antenna is stopped from being adjusted, and the antenna field type corresponding to the coupling relationship between the main antenna and the field type adjusting antenna is adopted to receive the satellite signals. Besides the way of turning on the switches SW 1-SW 4 alternately, the different combinations of the switches SW 1-SW 4 can also be turned on to generate different coupling relationships between the main antenna and the field adjusting antenna.
In addition, if the average intensity of the satellite signal of the target satellite is not lower than the first preset intensity, which means that the current antenna pattern angle of the antenna array is not required to be adjusted yet, the adjustment of the coupling relationship between the main antenna and the pattern adjusting antenna may be stopped, and after a preset time period, the average intensity of the satellite signal of the satellite and the threshold intensity may be calculated from the beginning to continuously determine whether the angle adjustment of the antenna pattern is required, where the preset time period may be, for example, 300 seconds, but is not limited thereto. In addition, the control unit 104 may also determine whether the average intensities corresponding to the adjusted antenna patterns are all lower than a first preset intensity, and if the average intensities corresponding to the adjusted antenna patterns are all lower than the first preset intensity, the adjustment of the coupling relationship between the main antenna and the pattern adjustment antenna may be stopped, and after a preset period of time, the average intensity of the satellite signals of the satellites may be calculated again, the threshold intensity may be recalculated, and candidate satellites and the target satellite may be reselected to perform the angle adjustment of the antenna patterns. Therefore, the problem that the calculation cost is wasted because the angle of the antenna pattern is continuously adjusted when the control unit 104 cannot adjust the angle of the antenna pattern corresponding to the target satellite can be avoided. By waiting for a preset time, the satellite moves to different relative positions and then angle adjustment of the antenna pattern is performed, and unnecessary adjustment attempts can be reduced.
Fig. 5 is a flowchart illustrating an antenna pattern adjusting method according to an embodiment of the invention, referring to fig. 5. In the above embodiments, the method for adjusting the antenna field pattern of the satellite signal receiving apparatus may include the following steps. First, the average intensities of the satellite signals of a plurality of target satellites are calculated (step S502). Then, it is determined whether the average intensity is lower than a first predetermined intensity (step S504), wherein the first predetermined intensity may be, for example, 42dB, but not limited thereto. If the average strength is lower than the first predetermined strength, the coupling relationship between the main antenna and the pattern-adjusting antenna is adjusted to adjust the angle of the antenna pattern so that the average satellite signal strength of the target satellite received by the antenna array is higher than the first predetermined strength (step S506). On the contrary, if the average intensity is not lower than the first predetermined intensity, the angle of the antenna pattern is not adjusted (step S508). The method of adjusting the coupling relationship between the main antenna and the field adjusting antenna may be, for example, controlling the coupling relationship between the field adjusting antenna and the ground, and further adjusting the coupling relationship between the main antenna and the field adjusting antenna.
For example, in the case of the embodiment shown in fig. 2, the step S506 may turn on the switch SW1, and turn off the switches SW2, SW3 and SW4, i.e., couple the pattern adjusting antenna 204-1 to the ground, to adjust the antenna pattern to the first antenna pattern (step S506-1), and determine whether the average satellite signal strength of the target satellite is higher than a first predetermined strength (step S506-2). If the average satellite signal strength of the target satellite is higher than the first predetermined strength, the adjustment of the antenna pattern is completed (step S506-3). In this way, if the average satellite signal strength of the target satellite is not higher than the first predetermined strength, the switches SW2, SW3 and SW4 are turned on in turn, and the remaining switches are turned off, i.e., the pattern adjusting antenna 204-2 is coupled to the ground in turn, and the antenna pattern is adjusted to the second antenna pattern, the third antenna pattern or the fourth antenna pattern, and if the average satellite signal strength of the target satellite is higher than the first predetermined strength, the adjustment of the antenna pattern is completed (as shown in steps S506-4 to S506-9). If it is determined in step S506-9 that the average satellite signal strength of the target satellite is not higher than the first predetermined strength, that is, the average satellite signal strengths of the target satellites corresponding to all the adjusted antenna patterns are not higher than the first predetermined strength, it is determined whether a predetermined time period has elapsed (step S506-10). If the predetermined time has not elapsed, go back to step S506-10. If the preset time period has elapsed, the method may return to step S502 to recalculate the average intensity of the satellite signal of the target satellite. Therefore, the antenna pattern angle can be prevented from being continuously adjusted, and the antenna pattern angle can be adjusted after the target satellite moves to different positions by waiting for a preset time, so that unnecessary adjustment attempts are reduced. The preset time may be, for example, 300 seconds, but not limited thereto. After step S506-3, steps such as step S506-10 may be added to determine whether a predetermined time period has elapsed, and the process returns to step S502.
Fig. 6 and 7 are schematic flowcharts of an antenna pattern adjusting method according to another embodiment of the invention, and fig. 6 and 7 are shown. Compared with the embodiment of fig. 5, the antenna field pattern adjustment method of the satellite signal receiving apparatus in the embodiments of fig. 6 and 7 further includes a step of selecting a target satellite. First, the average intensity of satellite signals of a plurality of satellites in the sky is calculated (step S602). Then, a second predetermined intensity is added to the average intensity of the satellite signals of the plurality of satellites to obtain a threshold intensity (step S604), wherein the second predetermined intensity may be, for example, 0.5dB, but not limited thereto. Then, a plurality of candidate satellites with satellite signal strengths higher than the threshold strength are selected from the plurality of satellites according to the threshold strength (step S606), and then an average elevation angle and an azimuth angle of the candidate satellites with respect to the pattern of the antenna array are calculated (step S608), and it is determined whether the average elevation angle is smaller than a threshold angle (step S610), where the threshold angle may be, for example, 60 degrees, but not limited thereto, and in some embodiments, the threshold angle may be different depending on the implementation of the antenna array. If the average elevation angle is not smaller than the threshold angle, the angle of the antenna pattern is not adjusted (step S508). If the average elevation angle is smaller than the threshold angle, the satellite with the highest satellite signal strength is selected from the candidate satellites, and the satellite signal strength is taken as the reference strength (step S612). Then, it is determined whether the reference strength is higher than the threshold strength (step S614), and if the reference strength is higher than the threshold strength, a satellite with the satellite signal strength from the largest satellite signal strength to the nth satellite signal strength among the candidate satellites is selected as the target satellite (step S616), that is, the former N satellites with the satellite signal strength being larger are selected as the target satellite, where N may be, for example, 4, but not limited thereto. After the target satellite is selected, step S502 may be performed to calculate the average strength of the satellite 420 signals of the target satellites, and the following steps are already described in the embodiment of fig. 5, and thus are not repeated herein. On the contrary, if the reference strength is not higher than the threshold strength, it means that the number of satellites with larger satellite signal strength is too small, and if the previous N satellites with larger satellite signal strength are used as the target satellites and the angle adjustment of the antenna pattern is performed accordingly, the antenna pattern may not be accurately adjusted to the ideal angle, and the reception quality of the antenna may not be effectively improved. Therefore, if the reference strength is not higher than the threshold strength, the process returns to step S602 to recalculate the threshold strength, and then reselect the target satellite to perform the angle adjustment of the antenna pattern accordingly.
In addition, in this embodiment, if it is determined that the average intensities of the satellite signals of the target satellites are not lower than the first predetermined intensity, or that the average intensities of the satellite signals of the target satellites corresponding to the antenna patterns are all lower than the first predetermined intensity, the adjustment of the coupling relationship between the main antenna and the pattern adjustment antenna may be stopped, and then the process proceeds to step S506-10 to determine whether a predetermined time period has elapsed. In the present embodiment, if a predetermined time period has elapsed, the method returns to step S602 to recalculate the threshold strength, and then reselects the target satellite to perform the angle adjustment of the antenna pattern accordingly. Therefore, the problem that the calculation cost is wasted due to the fact that the angle of the antenna pattern is continuously adjusted can be avoided, the satellite is enabled to move to different positions by waiting for a period of preset time, then the angle of the antenna pattern is adjusted, and unnecessary adjustment attempts can be reduced. The preset time may be, for example, 300 seconds, but not limited thereto.
In summary, the embodiments of the invention adjust the coupling relationship between the main antenna and the antennas by adjusting the main antenna and the plurality of patterns to adjust the angle of the antenna pattern, so that the average satellite signal strength of the target satellite received by the antenna array is higher than the first predetermined strength, thereby effectively ensuring the reception quality of the antenna of the satellite signal receiving apparatus.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (12)
1. A satellite signal receiving apparatus, comprising:
an antenna array for receiving satellite signals from a plurality of satellites, the antenna array comprising:
a main antenna for radiating an antenna pattern; and
at least one field adjusting antenna for coupling the antenna field to adjust the angle of the antenna field; and
a control unit coupled to the field adjustment antennas for calculating an average strength of satellite signals of the satellites, and adding a second preset strength to the average strength of the satellite signals of the satellites to obtain a threshold strength, selecting a plurality of candidate satellites from the satellites with satellite signal strengths higher than the threshold strength according to the threshold strength, and calculating an average elevation angle of the candidate satellites to determine whether the average elevation angle is smaller than a threshold angle, if the average elevation angle is smaller than the threshold angle, the control unit selecting a satellite signal strength of a satellite with a satellite signal strength that is the nth largest among the candidate satellites as a reference strength, the control unit determining whether the reference strength is higher than the threshold strength, if the reference strength is higher than the threshold strength, the control unit selecting the satellite with the satellite signal strength that is the largest to the nth largest among the candidate satellites as a target satellite, the control unit further calculates an average intensity of satellite signals of a plurality of target satellites, determines whether the average intensity of the satellite signals of the target satellites is lower than a first preset intensity, and adjusts a coupling relationship between the main antenna and the field type adjusting antennas to adjust an angle of the antenna field type so that the average satellite signal intensity of the target satellites received by the antenna array is higher than the first preset intensity if the average intensity of the satellite signals of the target satellites is lower than the first preset intensity.
2. The satellite signal receiving device of claim 1, wherein if the average elevation angle is not less than the threshold angle, the angle of the antenna pattern is not adjusted.
3. The satellite signal receiving device of claim 1, wherein the threshold angle is 60 degrees.
4. The satellite signal receiving device of claim 1, wherein if the average intensity of the satellite signals of the target satellites is not lower than the first predetermined intensity, the control unit stops adjusting the coupling relationship between the main antenna and the pattern adjusting antennas and continues to calculate the average intensity of the satellite signals of the satellites after a predetermined time period has elapsed.
5. The satellite signal receiving apparatus according to claim 1, wherein the control unit further determines whether the average intensities of the satellite signals of the target satellites corresponding to the adjusted antenna patterns are all lower than the first predetermined intensity, and stops adjusting the coupling relationship between the main antenna and the field-adjusted antennas if the average intensities of the satellite signals of the target satellites corresponding to the adjusted antenna patterns are all lower than the first predetermined intensity, and continues to calculate the average intensities of the satellite signals of the satellites after a predetermined period of time has elapsed.
6. The satellite signal receiving apparatus according to claim 1, further comprising:
the control unit controls the conducting state of the switches so as to adjust the coupling relation between the main antenna and the field type adjusting antennas.
7. An antenna field pattern adjustment method, comprising:
using an antenna array to receive satellite signals of a plurality of satellites, wherein the antenna array comprises a main antenna and at least one pattern adjusting antenna, the main antenna is used for radiating an antenna pattern, and the pattern adjusting antennas are used for coupling the antenna pattern to adjust the angle of the antenna pattern;
calculating the average strength of the satellite signals of the satellites;
adding a second preset intensity to the average intensity of the satellite signals of the satellites to obtain a threshold intensity;
selecting a plurality of candidate satellites with satellite signal intensity higher than the threshold intensity from the satellites according to the threshold intensity;
calculating the average elevation angle of the candidate satellites relative to the antenna pattern of the antenna array;
judging whether the average elevation angle is smaller than a threshold angle;
if the average elevation angle is smaller than the threshold angle, selecting the satellite signal intensity of the satellite with the satellite signal intensity Nth highest from the candidate satellites as a reference intensity;
judging whether the reference intensity is higher than the threshold intensity, if so, selecting a satellite with the satellite signal intensity from the largest satellite signal intensity to the Nth satellite signal intensity in the candidate satellites as a target satellite, wherein N is a positive integer and is more than or equal to 4;
calculating an average intensity of satellite signals of a plurality of target satellites;
judging whether the average intensity of the satellite signals of the target satellites is lower than a first preset intensity or not; and
if the average satellite signal strength of the target satellites is lower than the first preset strength, the coupling relation between the main antenna and the field pattern adjusting antennas is adjusted to adjust the angle of the antenna field pattern, so that the average satellite signal strength of the target satellites received by the antenna array is higher than the first preset strength.
8. The antenna field adjustment method of claim 7, further comprising:
if the average elevation angle is not smaller than the threshold angle, the angle of the antenna pattern is not adjusted.
9. The method of claim 7 wherein the threshold angle is 60 degrees.
10. The antenna field adjustment method of claim 7, further comprising:
if the average intensity of the satellite signals of the target satellites is not lower than the first preset intensity, stopping adjusting the coupling relation between the main antenna and the field type adjusting antennas;
judging whether a preset time period passes or not; and
if a preset time period elapses, the average intensity of the satellite signals of the satellites is continuously calculated.
11. The antenna field adjustment method of claim 7, further comprising:
judging whether the average intensity of the satellite signals of the target satellites corresponding to the various antenna patterns after adjustment is lower than the first preset intensity;
if the average intensity of the satellite signals of the target satellites corresponding to the adjusted antenna patterns is lower than the first preset intensity, stopping adjusting the coupling relation between the main antenna and the pattern adjusting antennas;
judging whether a preset time period passes or not; and
if a preset time period elapses, the average intensity of the satellite signals of the satellites is continuously calculated.
12. The method according to claim 7, wherein in the step of adjusting the coupling relationship between the main antenna and the field adjusting antennas, the coupling relationship between the field adjusting antennas and a ground is controlled to adjust the coupling relationship between the main antenna and the field adjusting antennas.
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| CN109462433B (en) * | 2018-11-07 | 2019-11-26 | 北京天海达科技有限公司 | A kind of Big Dipper short message sending device and method |
| US11201398B2 (en) * | 2019-10-28 | 2021-12-14 | Nanning Fugui Precision Industrial Co., Ltd. | Antenna device and method for determining radiation pattern |
| CN112583457B (en) * | 2020-11-27 | 2022-04-15 | 上海龙旗科技股份有限公司 | Intelligent antenna system |
| CN113900134B (en) * | 2021-12-07 | 2022-03-15 | 天津仁爱学院 | Anti-interference satellite positioning equipment with multiple coupled positioning systems |
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