CN109188343A - A kind of method, apparatus and computer storage medium for searching for signal source - Google Patents
A kind of method, apparatus and computer storage medium for searching for signal source Download PDFInfo
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- CN109188343A CN109188343A CN201810930060.1A CN201810930060A CN109188343A CN 109188343 A CN109188343 A CN 109188343A CN 201810930060 A CN201810930060 A CN 201810930060A CN 109188343 A CN109188343 A CN 109188343A
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- 238000010586 diagram Methods 0.000 description 11
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
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Abstract
A kind of method, apparatus and computer storage medium for searching for signal source, comprising: the performance number of antenna when deflecting into each preset direction of search from current initial direction according to antenna main lobe, it is determined whether complete signal source searching；When determining unfinished signal source searching, the performance number of antenna, determines the initial direction of the antenna main lobe in rear primary progress signal source searching when deflecting into each preset search direction from current initial direction according to determining antenna main lobe.According to antenna main lobe, the power of antenna in deflection carries out signal source searching to the embodiment of the present invention, shortens the sweep time sourced, reduces overhead, improves the response speed that antenna sources.
Description
Technical Field
The present disclosure relates to, but not limited to, antenna technology, and more particularly, to a method, apparatus, and computer storage medium for searching signal sources.
Background
Phased array antennas are preferred by users because they do not require the precision moving parts of conventional mechanical scanning antennas, but the application of ultra-magnetic permeability materials and expensive phase shifting units in the fields of portability, low cost, small space, etc. is limited.
The phased array antenna adopts the control of liquid crystal deflection to realize phase shift, thereby completing the beam scanning function. Since the deflection of the liquid crystal requires a certain time, how to quickly search for a beam and determine the response timeliness of the phased array antenna is critical.
At present, a phased array antenna in the related art adopts a method of performing global traversal scanning and then comparing and judging an optimal position to search a source, and the problems of long scanning time, high system overhead and untimely response exist.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
Embodiments of the present invention provide a method and an apparatus for searching a signal source, and a computer storage medium, which can shorten a source-searching scanning time, reduce system overhead, and increase a response speed of antenna source searching.
The embodiment of the invention provides a method for searching a signal source, which comprises the following steps:
determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
and when the incomplete signal source search is determined, determining the initial direction of the antenna main lobe when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
Optionally, before determining whether to complete the signal source search, the method further includes:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
Optionally, the determining whether to complete the signal source search includes:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
Optionally, the determining the initial direction when the signal source search is performed at the next time includes:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
Optionally, when the signal source search is performed for the first time, the method further includes:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
Optionally, the method further includes: recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
On the other hand, an embodiment of the present invention further provides a device for searching a signal source, including: a judging unit and a determining unit; wherein,
the judgment unit is used for: determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
the determination unit is used for: and when the judgment unit determines that the signal source search is not finished, the initial direction of the antenna main lobe is determined when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
Optionally, the apparatus further comprises a control unit, configured to:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
Optionally, the determining unit is specifically configured to:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
Optionally, the determining unit is specifically configured to:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
Optionally, the apparatus further includes a preset unit, configured to: when the signal source search is performed for the first time, the method further includes:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
Optionally, the apparatus further includes a recording unit, configured to:
recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
On the other hand, the embodiment of the present invention further provides a computer storage medium, where computer-executable instructions are stored in the computer storage medium, and the computer-executable instructions are used to execute the method for searching a signal source.
Compared with the related art, the technical scheme of the application comprises the following steps: determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction; and when the incomplete signal source search is determined, determining the initial direction of the antenna main lobe when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction. According to the embodiment of the invention, the signal source searching is carried out according to the power of the antenna when the antenna main lobe deflects, the source searching scanning time is shortened, the system overhead is reduced, and the antenna source searching response speed is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of a method of searching a signal source according to an embodiment of the present invention;
fig. 2 is a schematic directional diagram of an antenna main lobe according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an antenna main lobe pointing to a radiation area according to an embodiment of the present invention;
FIG. 4 is a block diagram of an apparatus for searching a signal source according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a mapping plane according to an embodiment of the present invention;
fig. 6 is a schematic diagram of signal source searching according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 1 is a flowchart of a method for searching a signal source according to an embodiment of the present invention, as shown in fig. 1, including:
step 101, determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
optionally, before determining whether to complete the signal source search, the method according to the embodiment of the present invention further includes:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
It should be noted that, in the embodiment of the present invention, the antenna main lobe needs to be respectively deflected from the current initial direction to each preset search direction, and therefore, each time deflection is completed, the embodiment of the present invention may also reset the antenna main lobe to the direction before deflection. In addition, the deflection angle can be analytically determined by those skilled in the art based on the properties of the antenna. Fig. 2 is a schematic diagram of the direction of the main lobe of the antenna according to the embodiment of the present invention, as shown in fig. 2, the starting points of the rays located in two planes are located in the phased array antenna (a plane without a grid), and the two-dimensional plane with the grid to which the rays are directed is an imaginary radiation area used for representing the signal source search scan, which is assumed for convenience of understanding, and theoretically, the radiation area is a spatial area with a certain amplitude, and the grid may not be an even grid. The deflection of the antenna main lobe refers to that the direction of the antenna main lobe is deflected by a preset angle from an initial position and then reaches another position, the antenna main lobe is assumed to be deflected to four searching directions from a position with the direction as O, the deflection angles are the same, included angles between the searching directions are the same, the antenna main lobe points to A, B, C and D respectively after the deflection is completed, and the antenna main lobe can be reset to the position of O after the deflection is completed every time based on the working principle of the antenna. Fig. 3 is a schematic diagram of the antenna main lobe pointing to the radiation area according to the embodiment of the present invention, and as shown in fig. 3, the antenna main lobe points A, B, C and D, respectively, from the position pointing to O.
Optionally, the determining whether to complete the signal source search according to the embodiment of the present invention includes:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
Optionally, the determining the initial direction when the signal source is searched for the next time in the embodiment of the present invention includes:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
And 102, when the incomplete signal source search is determined, determining the initial direction of the antenna main lobe when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
Optionally, when the signal source is searched for the first time, the method according to the embodiment of the present invention further includes:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
It should be noted that the direction of the antenna main lobe set in the embodiment of the present invention may be determined by analyzing according to the antenna attribute by a person skilled in the art, for example, the direction of the antenna main lobe is set to be a direction directly above the radiation area.
Optionally, the method in the embodiment of the present invention further includes: recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
It should be noted that, in the embodiment of the present invention, the register may record, according to a group, a search direction of deflection of the main lobe of the antenna when the antenna has the maximum power, and if the register indicates that the power value of the current search direction is not the maximum value by recording 0, it may indicate that the power of the antenna is the maximum value when the current search direction is deflected by taking the value of 1, and in the signal source search process, once the maximum value changes, the register value is also updated accordingly.
Compared with the related art, the technical scheme of the application comprises the following steps: determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction; and when the incomplete signal source search is determined, determining the initial direction of the antenna main lobe when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction. According to the embodiment of the invention, the signal source searching is carried out according to the power of the antenna when the antenna main lobe deflects, the source searching scanning time is shortened, the system overhead is reduced, and the antenna source searching response speed is improved.
Fig. 4 is a block diagram of an apparatus for searching a signal source according to an embodiment of the present invention, as shown in fig. 4, including: a judgment unit 401 and a determination unit 402; wherein,
the determination unit 401 is configured to: determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
the determining unit 402 is configured to: and when the judgment unit determines that the signal source search is not finished, the initial direction of the antenna main lobe is determined when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
Optionally, the apparatus in this embodiment of the present invention further includes a control unit 403, configured to:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
It should be noted that, in the embodiment of the present invention, the antenna main lobe needs to be respectively deflected from the current initial direction to each preset search direction, and therefore, each time deflection is completed, the embodiment of the present invention may also reset the antenna main lobe to the direction before deflection.
Optionally, the determining unit 401 in the embodiment of the present invention is specifically configured to:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
Optionally, the determining unit 402 in the embodiment of the present invention is specifically configured to:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
Optionally, the apparatus in this embodiment of the present invention further includes a preset unit 404, configured to: when the signal source search is performed for the first time, the method further includes:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
Optionally, the apparatus in this embodiment of the present invention further includes a recording unit 405, configured to:
recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
The embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used for executing the method for searching the signal source.
The method of the embodiment of the present invention is described in detail below by using application examples, which are only used for illustrating the present invention and are not used for limiting the protection scope of the present invention.
Application example
Because the direction of a signal source cannot be determined initially, the embodiment of the invention presets that the main lobe of the antenna is aligned right above, and the direction of the main lobe of the antenna at the moment is taken as the direction of the main lobe of the antenna when the signal source is searched for the first time.
The method comprises the steps of starting from the set direction of an antenna main lobe, controlling the antenna main lobe to deflect to each preset searching direction from the current initial direction according to a preset deflection angle, supposing that the antenna main lobe deflects to four directions of a plane formed by a radiation area, wherein the four directions are respectively defined as up, down, left and right, recording the power value of an antenna after each deflection is finished, and then resetting the antenna main lobe to the direction before deflection. Comparing the power values in the four search directions, and recording the direction register value of the search direction with the maximum power value as 1 and recording the rest directions as 0.
When the first signal source search is finished, assuming that the signal source search is not finished, the main lobe of the antenna is deflected to the direction pointed by the main lobe of the antenna when the value of the direction register is 1, and the initial direction of the main lobe of the antenna is used as the initial direction of the main lobe of the antenna when the signal source search is carried out at the next time.
Deflecting again in the four search directions after the antenna main lobe is directed in the redetermined direction (for the direction of the antenna main lobe in which the antenna power value was determined at the previous deflection, since it has undergone the deflecting operation, the deflection in that direction can be omitted); the following describes various cases of signal source search:
firstly, after the antenna main lobe deflects from the current initial direction to each searching direction, the recorded power values are equal, and then the current pointed position of the antenna main lobe is the position of the signal source, at this time, the embodiment of the present invention can assign the position with the direction register value of 1 to 0, and end the search of the signal source.
After the antenna main lobe is deflected at the previous time and at the present time, the pointed positions of the antenna main lobe are the same when the antenna power value is maximum, and the pointed positions of the antenna main lobe are the positions of the signal sources when the antenna power value is maximum in the previous signal source searching;
in the deflection process, partial (for example, 2 in 4) power values are equal and are the maximum values, and the direction of one antenna main lobe after deflection is set as the initial direction of the antenna main lobe when signal source searching is carried out at the next time in the embodiment of the invention;
and fourthly, changing the direction of the antenna main lobe when the power value is maximum, and selecting the direction of the antenna main lobe when the power value is maximum as the initial direction of the antenna main lobe when the signal source searching is carried out at the next time.
The embodiment of the invention continuously determines whether the signal source is determined according to the power value, determines the direction of the main lobe of the antenna during the searching of the signal source at the next time according to the power of the antenna during the deflection of the main lobe of the antenna when the signal source is not determined, and continues searching.
According to the requirement, the phased array antenna can be used as one antenna to perform beam scanning by using the algorithm, and the phased array antenna can be divided into a plurality of small antennas to perform beam scanning by using the algorithm. The embodiments of the present invention may be applied to any kind of phased array antenna, for example, a phased array antenna based on a switching phase shifter such as a Micro Electro Mechanical System (MEMS), a PIN diode (a diode in which a thin layer of lightly doped Intrinsic (Intrinsic) semiconductor layer is added between P and N semiconductor materials), a Complementary Metal Oxide Semiconductor (CMOS), etc.; a phased array antenna based on a varactor-reflective phase shifter; a phased array antenna based on a loaded linear phase shifter with permeability adjustable media such as ferroelectrics.
Assuming that each square of the two-dimensional plane (in this application example, simply referred to as a mapping plane) of the radiation area in fig. 2 represents one direction in which the antenna main lobe can point, adjacent squares are different by one unit angle step (deflection angle), the above example is explained below by specific parameters. For example, if the antenna main lobe starts from the right above, and can deflect 5 ° upward, downward, left, and right, when stepping by a unit angle of 1 °, there are (5 × 2+1) × (5 × 2+1) squares on the mapping plane; if the angle step is 0.1 °, the mapping plane has (50 × 2+1) × (50 × 2+1) squares. Fig. 5 is a schematic diagram of a mapping plane according to an embodiment of the present invention, as shown in fig. 5, O in a radiation area is a position pointed before a preset deflection operation of an antenna main lobe, and X is a position of a signal source; the antenna main lobe can deflect 4 unit angle steps upwards, downwards, leftwards and rightwards from the initial pointing direction, and the total number of (4 x 2+1) × (4 x 2+1) ═ 81 grids are obtained. Assuming that the priority of the direction register is up > left > down > right, fig. 6 is a schematic diagram of signal source search performed according to the embodiment of the present invention, as shown in fig. 6, the direction of the antenna main lobe is scanned from point O to point X as shown in fig. 6, and the specific process is as follows:
the power value of the O point is written into a power value register, then the O point is taken as a reference, the O point is sequentially deflected for a unit angle step length upwards, downwards, leftwards and rightwards, after each deflection, the power value after each deflection is recorded, and then the main lobe of the antenna is reset to the initial direction represented by the O point. After comparing the power values in the four directions, the register value in the upward direction is set to 1, and the other directions are set to 0.
Since the upward direction register is 1 in the previous step, the main lobe of the antenna is deflected upward by one unit angle step. After the deflection is finished, the power value pointed by the current antenna main lobe is the maximum value of the antenna in the previous signal source search, so when the direction is taken as the direction of the main lobe antenna searched by the signal source before deflection, the antenna is not deflected downwards, and the antenna is deflected upwards, leftwards and rightwards by a unit angle step length in sequence. After each deflection, the application example of the present invention still records the power value after each deflection, and then resets the antenna main lobe to the direction before deflection. After comparing the power values in the three directions, the upward direction register value is set to 1 since the upward direction register has a higher priority, and the remaining directions are set to 0.
The signal source search is performed based on the method set forth in the application example of the present invention, assuming that the directivity of the antenna main lobe has been adjusted to point X. At this time, if the signal source is located near the X point, the upward scanning is continued assuming that it is located at a position higher than the X point. If the signal source is exactly coincided with the direction represented by the X point, the upward scanning is still continued according to the priority level appointed by the direction register. But the power value at this point reaches a maximum. After scanning upwards, compared with the point X, the direction represented by the point X is not the optimal direction, so the power value of the direction is smaller than the power value of the previous step X point direction stored in the power register, therefore, the main lobe is moved by one unit angle step in the direction opposite to the deflection direction of the previous step, and all four direction registers are set to be 0. The deflection direction of the previous step is upward, and thus, it is necessary to deflect downward by one unit angular step. At this time, the pointing direction of the antenna main lobe returns to the point X again, and the four direction registers are all 0, at this time, the scanning is finished.
Table 1 shows a value change of the direction register in the embodiment of the present invention, referring to table 1, the direction of the antenna main lobe at the maximum value of the antenna power value changes according to the position of the signal source; and a, b, c, d, e and f are maximum power values of the antenna searched for by the signal source in each step respectively.
TABLE 1
In summary, assuming that the initial direction of the main lobe of the antenna is directly above the antenna, the number of unit angle steps that the main lobe can deflect in each direction (up, down, left, and right) is m. In the extreme case (X points located at the four corners of the mapping plane), the required number of scans is 2m +1, while the number of scans for the global traversal is (2m) ^ 2. It can be determined by analysis that there is 2m +1< (2m) ^2 only when m is 0, but m is 0 meaning that the antenna main lobe direction is not adjustable and does not conform to the characteristics of the phased array antenna. Thus, for a phased array antenna, i.e., m >1 arbitrary, there is always 2m +1> (2m) ^ 2. Furthermore, embodiments of the present invention only require 5 registers (i.e., 4 direction registers and 1 power value register) rather than storing power values for all possible directions. Therefore, the scanning time of the phased array antenna is shortened and the system overhead is saved by applying the example method.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in hardware, for example, by an integrated circuit to implement its corresponding function, or in software, for example, by a processor executing a program/instruction stored in a memory to implement its corresponding function. The present invention is not limited to any specific form of combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. A method of searching for a signal source, comprising:
determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
and when the incomplete signal source search is determined, determining the initial direction of the antenna main lobe when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
2. The method of claim 1, wherein before the determining whether to complete the signal source search, the method further comprises:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
3. The method of claim 1, wherein the determining whether to complete the signal source search comprises:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
4. The method of claim 3, wherein determining the initial pointing direction at the time of the subsequent signal source search comprises:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
5. The method according to any one of claims 1 to 4, wherein the first time the signal source search is performed, the method further comprises:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
6. The method according to any one of claims 1 to 4, further comprising: recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
7. An apparatus for searching a signal source, comprising: a judging unit and a determining unit; wherein,
the judgment unit is used for: determining whether signal source searching is finished or not according to the power value of the antenna when the main lobe of the antenna deflects from the current initial direction to each preset searching direction;
the determination unit is used for: and when the judgment unit determines that the signal source search is not finished, the initial direction of the antenna main lobe is determined when the signal source search is carried out at the next time according to the power value of the antenna when the determined antenna main lobe deflects from the current initial direction to each preset search direction.
8. The apparatus according to claim 7, further comprising a control unit for:
controlling the main lobe of the antenna to deflect from the current initial direction to each preset search direction respectively according to a preset deflection angle;
wherein the search direction comprises: three or more search directions equally angularly spaced.
9. The apparatus according to claim 7, wherein the determining unit is specifically configured to:
when the power values of the antenna are equal when the antenna main lobe deflects from the current initial direction to the preset searching directions, taking the current initial direction position of the antenna main lobe as a signal source position, and finishing the signal source searching;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are different, and the searching direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the current signal source searching process is taken as a first direction; taking the search direction to which the antenna main lobe corresponding to the maximum power value of the antenna deflects in the previous signal source search process as a second direction; when the first direction and the second direction are opposite to each other, the position pointed by the antenna main lobe in the previous signal source search is used as the position of a signal source, and the signal source search is ended; the first direction and the second direction are not opposite to each other, and the signal source searching is determined to continue;
and when the power values of the antennas are partially equal and are all the maximum values when the antenna main lobe deflects from the current initial direction to each preset searching direction, determining to continue the signal source searching.
10. The apparatus according to claim 9, wherein the determining unit is specifically configured to:
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antennas are unequal, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, the position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction when the signal source searching is carried out at the next time;
when the antenna main lobe deflects from the current initial direction to each preset searching direction, the power values of the antenna are partially equal and are all maximum values, and when the antenna main lobe deflects from the current initial direction to each preset searching direction, one position to which the antenna main lobe corresponding to the maximum power value of the antenna deflects is used as the initial direction in the signal source searching process at the next time according to a first preset strategy.
11. The device according to any one of claims 7 to 10, further comprising a presetting unit for: when the signal source search is performed for the first time, the method further includes:
and setting the direction of any one antenna main lobe according to a second preset strategy as the initial direction before the antenna main lobe deflects to each preset searching direction when the signal source searching is carried out for the first time.
12. The apparatus according to any one of claims 7 to 10, further comprising a recording unit for:
recording a search direction to which the corresponding antenna main lobe deflects when the maximum power value of the antenna is recorded through a preset register;
and when the signal source searching is determined to be finished, clearing the searching direction to which the antenna main lobe deflects corresponding to the maximum antenna power value recorded in the register.
13. A computer storage medium having computer-executable instructions stored therein for performing the method of searching for a signal source of any one of claims 1-6.
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| CN102292870A (en) * | 2011-06-16 | 2011-12-21 | 华为技术有限公司 | Phased-array antenna aligning method and device and phased-array antenna |
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