CN110611540B - Method, device and system for determining antenna forming gain - Google Patents
Method, device and system for determining antenna forming gain Download PDFInfo
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- CN110611540B CN110611540B CN201810613795.1A CN201810613795A CN110611540B CN 110611540 B CN110611540 B CN 110611540B CN 201810613795 A CN201810613795 A CN 201810613795A CN 110611540 B CN110611540 B CN 110611540B
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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Abstract
The application discloses a method, a device and a system for determining antenna forming gain, which are used for simply determining the transmitting performance of a large-scale antenna. The application provides a method for determining antenna forming gain, which comprises the following steps: when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna; when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles; and respectively determining angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset beam forming angle.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for determining antenna forming gain.
Background
The directivity of a single antenna is limited, and in order to be suitable for application in various occasions, two or more single antennas working at the same frequency are fed and spatially arranged according to certain requirements to form an antenna array, which is also called an antenna array.
The increase of the antenna array scale brings about a great increase of the available spatial degree of freedom, but the great extension of the antenna dimension also provides an unprecedented challenge for the design of the corresponding physical layer technical scheme.
Disclosure of Invention
The embodiment of the application provides a method, a device and a system for determining antenna forming gain, which are used for simply determining the transmitting performance of a large-scale antenna.
The method for determining the antenna forming gain provided by the embodiment of the application comprises the following steps:
when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna;
when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
and respectively determining angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset beam forming angle.
By the method, when the antenna works in a single-antenna transmission mode, the transmission power of the single antenna is determined; when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles; and determining the angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset wave beam forming angle, so that the transmitting performance of a large-scale antenna can be determined simply and conveniently, and a large amount of cost is saved.
Optionally, the determining broadcast forming power of the transmission signal of the antenna at multiple angles by performing full-angle measurement through the phase shifter specifically includes:
and measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through the phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method.
Optionally, the determining, for a lobe formed by the antenna at each preset beamforming angle, angle beamforming powers of a plurality of angles corresponding to the lobe specifically includes:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
Alternatively, every two adjacent sampling point angles are set at equal intervals.
Optionally, the method further includes calculating a broadcast beamforming gain using the following formula:
wherein, the broadcast forming Power is PowerBCAST(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
Optionally, the method further includes calculating the currently set beamforming angle BF by using the following formulaangThe following beamforming gains:
wherein, the angle forming Power of the special pilot demodulation reference signal DMRS is PowerDMRS(BFang)(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
Correspondingly, an apparatus for determining antenna forming gain provided in the embodiment of the present application includes:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna;
when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
and respectively determining angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset beam forming angle.
Optionally, the determining broadcast forming power of the transmission signal of the antenna at multiple angles by performing full-angle measurement through the phase shifter specifically includes:
and measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through the phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method.
Optionally, the determining, for a lobe formed by the antenna at each preset beamforming angle, angle beamforming powers of a plurality of angles corresponding to the lobe specifically includes:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
Alternatively, every two adjacent sampling point angles are set at equal intervals.
Optionally, the processor is further configured to: the broadcast beamforming gain is calculated using the following formula:
wherein, the broadcast forming Power is PowerBCAST(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
Alternatively,the processor is further configured to: calculating the currently set beamforming angle BF using the following formulaangThe following beamforming gains:
wherein, the angle forming Power of the special pilot demodulation reference signal DMRS is PowerDMRS(BFang)(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
Another apparatus for determining antenna forming gain provided in an embodiment of the present application includes:
the antenna comprises a first unit, a second unit and a third unit, wherein the first unit is used for determining the transmitting power of a single antenna when the antenna works in a single-antenna transmitting mode;
the second unit is used for carrying out full-angle measurement through the phase shifter when the antenna works in a broadcast forming state, and determining broadcast forming power of the antenna for transmitting signals at multiple angles;
and a third unit, configured to determine, for each lobe formed by the antenna at each preset beamforming angle, angle forming powers of multiple angles corresponding to the lobe.
The system for determining the antenna forming gain provided by the embodiment of the application comprises any one of the devices and a phase shifter.
Another embodiment of the present application provides a computing device, which includes a memory and a processor, wherein the memory is used for storing program instructions, and the processor is used for calling the program instructions stored in the memory and executing any one of the above methods according to the obtained program.
Another embodiment of the present application provides a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform any one of the methods described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a network system according to an embodiment of the present application;
fig. 2 is a schematic flowchart of a method for determining antenna forming gain according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an apparatus for determining antenna forming gain according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another apparatus for determining antenna forming gain according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a method, a device and a system for determining antenna forming gain, which are used for simply determining the transmitting performance of a large-scale antenna.
According to the embodiment of the application, different forming and transmitting angles are realized by setting the forming coefficient of the base station, and dotting power detection of lobes is realized through the antenna phase-shifting network, so that measurement of large-scale antenna gain and drawing of a gain directional diagram are completed. The shaped gain is obtained by comparing the standard broadcast shaped and original omnidirectional antenna power.
According to the method and the device, a large number of expected pointing results of the antenna can be verified, a simple verification means for the algorithm can be realized, and great application value is achieved in the research and development process.
According to the embodiment of the application, different lobe emission angles are realized by setting the shaping coefficient of the base station, and the power detection of the lobes is realized through the antenna phase-shifting network, so that the measurement of the large-scale antenna gain and the drawing of the gain directional diagram are completed. The shaped gain is obtained by comparing the standard broadcast shaped and original omnidirectional antenna power.
Because the antenna phase shifting network can only obtain power of one lobe angle after setting a value each time, a series of angle sampling points need to be set through the phase shifting network, then each angle profile of the lobe angle is obtained, and finally the whole lobe shape is obtained through an interpolation mode.
In practical tests, there are two methods of implementation:
the method one, through the angle of the program control phase shifter, the position sample point interval of lobe peak estimated is 1 degree, and the sample point interval near the trough is 2.5 degrees;
and secondly, setting an angle based on a feedback mode of measuring gain, firstly measuring the power in the angle forming direction, then trying to adjust the angle of the phase shifter, wherein the maximum stepping range is 5 degrees, the minimum stepping range is 0.5 degrees, and the adjustment target is that the change of the current receiving gain does not exceed 0.5db of the last correct measurement value. In the initial state, stepping is 0.5 degrees, when the gain change of 0.5 degrees does not exceed 0.5db, the stepping is increased by 0.5 degrees, and then measurement is continued until the stepping reaches 5 degrees or the gain conversion exceeds 0.5 db; when the gain exceeds 0.5db, a step angle of about 1/2 is backed off (by a multiple of 0.5 degrees) on the last basis and then remeasured. When the step is 0.5 degree, the step density is maintained unchanged.
The above-mentioned way of drawing the whole contour by sampling is simply referred to as dotting.
The overall test method is shown in fig. 1 and comprises the following test steps:
step one, testing the reference power of a single antenna: setting a large-scale antenna (namely an antenna array) to work in a single-antenna transmission mode through a phase shifter control console, and then setting a phase shifter to be in a direct-through mode, wherein the transmission power of a single antenna can be obtained at the moment and is used as the basis of measurement;
step two, testing the broadcast forming gain: the large-scale antenna is set to work in a broadcast forming state through the console, the antenna can send signals in an omnidirectional mode at the moment, and the power with the same amplitude can be tested at all direction angles (usually within 65 degrees). Because the phase shifter can only set one angle at a time; therefore, the phase shifter is set at uniform equal intervals within 0-180 degrees, and then the broadcast forming power value corresponding to the current angle is obtained. After obtaining each sample value of 0-180 degrees, obtaining a broadcast forming power pattern within the whole 180 degrees by an interpolation method;
step three, beam forming gain test: through the console, firstly, the angle BF of beam forming is setang(ii) a In this case, theoretically, a large-scale antenna would form a BFangAn angular lobe; then, uniformly setting the lobe at equal intervals within 0-180 degrees through a phase shifter to obtain power value sampling points of the lobe, and obtaining an angle forming power pattern within the whole 180 degrees through an interpolation method; and after the test is finished for one angle, newly setting one angle, and repeating the steps to obtain the beam forming power patterns of a plurality of angles.
Obtaining a pattern by the broadcast forming gain, and subtracting a 64-antenna reference power test result to obtain a broadcast forming gain pattern; the reference power test result of 64 single antennas can be obtained by superposing the power obtained when each antenna works independently, or can be obtained by sampling and testing a plurality of antennas, then averaging and finally multiplying the average by the total number of the antennas.
And subtracting the reference power test result of 64 single antennas from the beamforming gain of a certain angle to obtain a beamforming gain pattern of the angle. In the actual test, the angles can be selected densely or randomly.
The gain is calculated as follows:
the premise hypothesis is that:
after the shaping angle of the base station is fixed (for example, the vertical normal direction is selected), the shape of the waveform transmitted by the base station is fixed, and at this time, each angle direction of the waveform transmitted by the base station can be measured by a phase shifter connected with an antenna, so that the corresponding lobe shape is obtained. I.e. measuredThe Power of dedicated pilot Demodulation Reference Signal (DMRS) is PowerDMRS(BFang)(ang),
Wherein BFangRepresenting the currently set beamforming angular direction and ang the respective angular direction of the current lobe.
After the fixed base station is used for broadcast shaping, the power condition of each angle of a broadcast lobe of the base station can be obtained by changing the angle of the phase shifter, so that the shape of the broadcast lobe is obtained. Recording the measured broadcast Power as PowerBCAST(ang),
Where ang is the angular direction of the current lobe.
When only a single antenna of the base station is reserved and the phase shifter is set to be in a through state, the transmitting power of the single antenna can be measured. Note that the Power of the nth antenna is Powerant(n),
And (3) calculating the result:
the broadcast beamforming gain is as follows:
and BFangThe beamforming gain for the angle is as follows:
in the same way, BFangThe gain of angle beamforming versus broadcast beamforming is calculated as follows:
GainBF_cast(ang)＝GainBF(BFang)(ang)-GainBcast(ang)
through the formula, the receiving gain power and the beam forming gain of the broadcast beam can be calculated, and the corresponding test pattern can be drawn.
The power test of broadcast beamforming can be obtained by selecting a non-directional Reference Signal, such as a Cell Reference Signal (CRS) (LTE) or a Tracking Reference Signal (TRS) (5G NR). The power test of the angle beamforming may be obtained by selecting a Demodulation Reference Signal (DMRS), for example, a Demodulation Reference Signal (DMRS) dedicated to the user.
The fixed channel simulator in fig. 1 functions to include: and simulating the distance between the receiver and the antenna to be measured. Because the shaping can only take effect after a certain distance, in order to simulate a microwave darkroom or an actual air interface state, the distance from the receiver to the antenna to be measured needs to be increased.
The function of the frequency spectrograph comprises: and measuring the reference power of the single antenna and the power gain of broadcast forming and beam forming by adopting the average power under the test bandwidth. The power gain value can be accurately obtained by using the channel power measurement of the frequency spectrograph.
In summary, referring to fig. 2, for an antenna array, that is, a large-scale antenna, a method for determining an antenna forming gain provided in an embodiment of the present application includes:
s101, when the antenna works in a single-antenna transmitting mode, determining the transmitting power of a single antenna;
the antenna described in this method is a large-scale antenna.
S102, when the antenna works in a broadcast forming state, carrying out full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
s103, determining angle forming power of a plurality of angles corresponding to a lobe for each preset beam forming angle of the antenna.
By the method, when the antenna works in a single-antenna transmission mode, the transmission power of the single antenna is determined; when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles; and determining the angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset wave beam forming angle, so that the transmitting performance of a large-scale antenna can be determined simply and conveniently, and a large amount of cost is saved.
Optionally, the determining broadcast forming power of the transmission signal of the antenna at multiple angles by performing full-angle measurement through the phase shifter specifically includes:
and measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through the phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method.
And obtaining the corresponding power of a plurality of points in the measuring range by adopting a dotting mode. As can be seen from the dotting mode, the power difference of each point is not greater than 0.5dB, and the angle change is not greater than 5 degrees. The power change between each point can be considered as a linear change relative to the measured distance and the dimensions of the antenna and the receiver.
For example, at two sampling points of 89 ° and 90 °, the power difference is 0.2dB, and it can be considered that the power change and the angle change are in a linear relationship between 89 ° and 90 °, and the two points can be connected by a straight line or a smooth curve. The rule corresponds to each sampling point, and all the sampling points can be connected to obtain a required shaping effect graph.
Optionally, the determining, for a lobe formed by the antenna at each preset beamforming angle, angle beamforming powers of a plurality of angles corresponding to the lobe specifically includes:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
For example, for beamforming of a single user, a main lobe and two side lobes are generated after beamforming. There is theoretically a zero power point between the main lobe and the side lobe where the beams cancel coherently. By adopting the same sampling rule, the highest power point of the main lobe and the side lobe can be accurately measured, and the equal power angles at two sides of the zero power point can be measured. And by combining with the theoretical calculation of beam coherence, the judgment of whether the forming effect accords with the theoretical expectation can be made.
Alternatively, every two adjacent sampling point angles are set at equal intervals.
According to the sampling method and the drawing rule, the accuracy of the shaped effect graph is determined by the density of the sampling points. The sampling method of 0.5dB power difference is relatively large-scale antenna, and the power scale of the antenna is far larger than the measurement precision. The error allowable range of the shaping effect required by the client is far larger than the measurement accuracy. In the actual use process, the shaped effect graph can be simply and quickly obtained by sampling at equal angle intervals, such as every 1-degree interval.
Optionally, the method further includes calculating a broadcast beamforming gain using the following formula:
wherein, the broadcast forming Power is PowerBCAST(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas of the antenna array.
Optionally, the method further includes calculating the currently set beamforming angle BF by using the following formulaangThe following beamforming gains:
wherein, the angle forming Power of the special pilot demodulation reference signal DMRS is PowerDMRS(BFang)(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas of the antenna array.
Accordingly, referring to fig. 3, an apparatus for determining an antenna forming gain according to an embodiment of the present application may be, for example, the phase shifter console shown in fig. 1, and specifically includes:
a memory 11 for storing program instructions;
a processor 12 for calling the program instructions stored in the memory and executing, according to the obtained program:
when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna;
when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
and respectively determining angle forming power of a plurality of angles corresponding to the lobe aiming at the lobe formed by the antenna at each preset beam forming angle.
Optionally, the determining broadcast forming power of the transmission signal of the antenna at multiple angles by performing full-angle measurement through the phase shifter specifically includes:
and measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through the phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method.
Optionally, the determining, for a lobe formed by the antenna at each preset beamforming angle, angle beamforming powers of a plurality of angles corresponding to the lobe specifically includes:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
Alternatively, every two adjacent sampling point angles are set at equal intervals.
Optionally, the processor is further configured to: the broadcast beamforming gain is calculated using the following formula:
wherein, the broadcast forming Power is PowerBCAST(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
Optionally, the processor is further configured to: calculating the currently set beamforming angle BF using the following formulaangThe following beamforming gains:
wherein, the angle forming Power of the special pilot demodulation reference signal DMRS is PowerDMRS(BFang)(ang),
The Power of the nth antenna is Powerant(n),
N denotes the total number of antennas.
The processor 12 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).
Referring to fig. 4, another apparatus for determining antenna forming gain provided in the embodiment of the present application includes:
a first unit 21, configured to determine a transmission power of a single antenna when the antenna operates in a single antenna transmission mode;
a second unit 22, configured to perform full-angle measurement through the phase shifter when the antenna operates in a broadcast forming state, and determine broadcast forming power of a transmission signal of the antenna at multiple angles;
a third unit 23, configured to determine, for each lobe formed by the antenna at each preset beamforming angle, angle forming powers of multiple angles corresponding to the lobe.
An antenna forming gain determination system provided in an embodiment of the present application, for example, a network system shown in fig. 1, includes the apparatus described in any of the embodiments of the present application, a phase shifter, and the like.
The embodiment of the present application provides a computing device, which may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a Central Processing Unit (CPU), memory, input/output devices, etc., the input devices may include a keyboard, mouse, touch screen, etc., and the output devices may include a Display device, such as a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT), etc.
The memory may include Read Only Memory (ROM) and Random Access Memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiments of the present application, the memory may be used for storing a program of any one of the methods provided by the embodiments of the present application.
The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained program instructions by calling the program instructions stored in the memory.
Embodiments of the present application provide a computer storage medium for storing computer program instructions for an apparatus provided in the embodiments of the present application, which includes a program for executing any one of the methods provided in the embodiments of the present application.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to terminal equipment and also can be applied to network equipment.
The Terminal device may also be referred to as a User Equipment (User Equipment, abbreviated as "UE"), a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), or the like, and optionally, the Terminal may have a capability of communicating with one or more core networks through a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), a computer with Mobile property, or the like, and for example, the Terminal may also be a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or a gNB in 5G system. The embodiments of the present application are not limited.
The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
In summary, the technical solution provided in the embodiment of the present application performs full angle measurement based on phase shift of a transmission signal, and implements measurement of transmission performance and forming gain of a large-scale antenna by comparing single antenna test power, broadcast forming signal power, and angle beam forming signal power; and based on the mode of uniformly setting angles (dotting), then obtaining a complete gain pattern through an interpolation mode; and, the broadcast forming adopts TRS or CRS to carry out power estimation; the angle beamforming uses DMRS for power estimation.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (11)
1. A method for determining antenna forming gain, the method comprising:
when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna;
when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
respectively determining angle forming power of a plurality of angles corresponding to a lobe formed by the antenna at each preset beam forming angle;
the performing full-angle measurement through the phase shifter to determine the broadcast forming power of the antenna at a plurality of angles for transmitting signals specifically includes:
measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through a phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method;
the method also includes calculating a broadcast beamforming gain using the following formula:
wherein the broadcast forming power is
The power of the nth antenna is
N denotes the total number of antennas.
2. The method according to claim 1, wherein the determining, for each lobe formed by the antenna at each preset beamforming angle, the angular beamforming powers of a plurality of angles corresponding to the lobe comprises:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
3. The method according to claim 1 or 2, wherein the angles of every two adjacent sampling points are set at equal intervals.
4. The method of claim 2, further comprising calculating an angle BF of currently set beamforming using the following formulaangDown beamformingShape gain:
wherein, the angle forming power of the special pilot demodulation reference signal DMRS is
The power of the nth antenna is
N denotes the total number of antennas.
5. An apparatus for determining antenna forming gain, comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
when the antenna works in a single-antenna transmission mode, determining the transmission power of the single antenna;
when the antenna works in a broadcast forming state, performing full-angle measurement through a phase shifter, and determining broadcast forming power of a transmission signal of the antenna at a plurality of angles;
respectively determining angle forming power of a plurality of angles corresponding to a lobe formed by the antenna at each preset beam forming angle;
the performing full-angle measurement through the phase shifter to determine the broadcast forming power of the antenna at a plurality of angles for transmitting signals specifically includes:
measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through a phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method;
the processor is further configured to: the broadcast beamforming gain is calculated using the following formula:
wherein the broadcast forming power is
The power of the nth antenna is
N denotes the total number of antennas.
6. The apparatus according to claim 5, wherein the determining, for each lobe formed by the antenna at each preset beamforming angle, the angular beamforming powers of a plurality of angles corresponding to the lobe comprises:
and respectively measuring the angle forming power of the lobe corresponding to each sampling point angle within 180 degrees by a phase shifter aiming at the lobe formed by the antenna at each preset beam forming angle, and then obtaining the angle forming power of the lobe within the whole 180 degrees by an interpolation method.
7. The apparatus according to claim 5 or 6, wherein the angles of every two adjacent sampling points are set at equal intervals.
8. The apparatus of claim 6, wherein the processor is further configured to: calculating the currently set beamforming angle BF using the following formulaangThe following beamforming gains:
wherein, the angle forming power of the special pilot demodulation reference signal DMRS is
Power of nth antennaA rate of
N denotes the total number of antennas.
9. An apparatus for determining antenna forming gain, comprising:
the antenna comprises a first unit, a second unit and a third unit, wherein the first unit is used for determining the transmitting power of a single antenna when the antenna works in a single-antenna transmitting mode;
the second unit is used for carrying out full-angle measurement through the phase shifter when the antenna works in a broadcast forming state, and determining broadcast forming power of the antenna for transmitting signals at multiple angles;
a third unit, configured to determine, for each lobe formed by the antenna at each preset beamforming angle, angle forming powers of multiple angles corresponding to the lobe;
the performing full-angle measurement through the phase shifter to determine the broadcast forming power of the antenna at a plurality of angles for transmitting signals specifically includes:
measuring the broadcast forming power corresponding to each sampling point angle within 180 degrees through a phase shifter, and then obtaining the broadcast forming power within the whole 180 degrees through an interpolation method;
the second unit is further configured to: the broadcast beamforming gain is calculated using the following formula:
wherein the broadcast forming power is
The power of the nth antenna is
N denotes the total number of antennas.
10. A system for determining the antenna forming gain, comprising the apparatus of any one of claims 5 to 9, and a phase shifter.
11. A computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1 to 4.
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Citations (3)
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|---|---|---|---|---|
| CN101222257A (en) * | 2007-01-09 | 2008-07-16 | 中兴通讯股份有限公司 | Test approach of intelligent antenna figuration gain |
| CN102035588A (en) * | 2010-12-01 | 2011-04-27 | 北京交通大学 | Multicast transmit beamforming method and system based on angle information |
| CN102480330A (en) * | 2010-11-25 | 2012-05-30 | 大唐移动通信设备有限公司 | Testing method and equipment for intelligent antenna broadcast forming of base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222257A (en) * | 2007-01-09 | 2008-07-16 | 中兴通讯股份有限公司 | Test approach of intelligent antenna figuration gain |
| CN102480330A (en) * | 2010-11-25 | 2012-05-30 | 大唐移动通信设备有限公司 | Testing method and equipment for intelligent antenna broadcast forming of base station |
| CN102035588A (en) * | 2010-12-01 | 2011-04-27 | 北京交通大学 | Multicast transmit beamforming method and system based on angle information |
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