TWI743744B - Beamforming device, calibration method and calibration system for the same - Google Patents

Abstract

A beamforming device, a calibration method and a calibration system for the same are provided. The beam forming device includes a processor, a memory unit, a baseband circuit, and a plurality of antenna modules. The baseband circuit is electrically connected to the processor and the memory unit. Each of the plurality of antenna modules includes a plurality of antenna units, a plurality of phase shifters and a plurality of amplifiers corresponding to the plurality of antenna units. The memory unit stores a plurality of reference codebooks and instruction data, each of the plurality of reference codebooks has a reference angle. The instruction data is used to enable the plurality of antenna modules to respectively designate a predetermined codebook from the plurality of reference codebook to control the plurality of antenna modules while transmitting and receiving signals.

Description

Beamforming device, correction method and correction system used therefor

Related applications

The present invention claims the priority of U.S. Provisional Application No. 62/851,111 (filing date: May 22, 2019), the complete content of which is incorporated into this invention patent specification for reference.

The present invention relates to a beamforming device, a correction method and a correction system used for the beamforming device, and more particularly to a beamforming device capable of correcting the phase difference between antenna modules, a correction method and a correction system used for the beamforming device.

In the field of millimeter wave communications, the path loss associated with the antenna module of the beamforming device is far greater than that of similar devices with lower operating frequencies. Beamforming technology is usually used to increase the communication range. The most common architecture is that one baseband module controls multiple antenna modules. In high-frequency applications, due to the small wavelength, it is difficult to meet the equipment requirements during manufacturing. For example, at an operating frequency of 60 GHz, its wavelength is only about 5 mm. This means that whenever a path change of 0.1mm occurs, a phase difference of 36 degrees will be caused between the antenna modules.

When there is a phase difference between the antenna modules, the phase difference will result in lower equivalent isotropically radiated power (EIRP) during beamforming, and even lead to poor sidelobe levels (Side- lobe Level, SLL), which in turn causes a deviation between the actual beamforming field pattern and the ideal beamforming field pattern.

Therefore, correcting the phase difference between the antenna modules of the beamforming module by means of correction to overcome the above-mentioned shortcomings has become one of the important issues to be solved by this business.

The technical problem to be solved by the present invention is to provide a beamforming device capable of correcting the phase difference between antenna modules, a correction method and a correction system for the beamforming device that can correct the phase difference between the antenna modules in view of the shortcomings of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a calibration method for a beamforming device, which is used in a beamforming device including a processor, a memory unit, a baseband circuit, and multiple antenna modules. , The plurality of antenna modules includes a reference antenna module and at least one calibration antenna module, and each of the plurality of antenna modules includes a plurality of antenna elements and a plurality of phase shifters corresponding to the plurality of antenna elements And a plurality of amplifiers, the calibration method includes: configuring the memory unit to store a first reference codebook, a second reference codebook, and a third reference codebook, wherein the first reference codebook is used to control the The multiple phase shifters and multiple amplifiers of the multiple antenna units of the reference antenna module, and the first reference codebook has a first reference angle, and the second reference codebook has a second reference Angle, the third reference code has a third reference angle; and performing a test procedure on the at least one calibration antenna module includes the following steps: configuring the baseband circuit according to a predetermined target field pattern to The multiple control data corresponding to the predetermined target field type in the first reference codebook control the reference antenna module, and the first reference codebook, the second reference codebook, and the first reference codebook are used to control the reference antenna module. The multiple control data corresponding to the predetermined target field pattern in the three reference codebooks control the at least one calibration antenna module to generate multiple test signals; configure a receiver to receive multiple test signals; configure the The computing device processes a plurality of the test signals to calculate equivalent isotropically radiated power (EIRP) of the plurality of test signals in the predetermined target field type, and generates a plurality of test results; and The calculation device is configured to select and set one of the first reference codebook, the second reference codebook, and the third reference codebook according to the maximum equivalent isotropic radiation power among the multiple test results One is at least one predetermined codebook used by the calibration antenna module to transmit and receive signals.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a correction system for a beamforming device, which includes a computing device, a beamforming device, a receiver, and a measuring device. The beamforming device is connected to the computing device, and the beamforming device includes a processor, a memory unit, a baseband circuit, and a plurality of antenna modules. A plurality of antenna modules includes a reference antenna module and at least one calibration antenna module, and each of the plurality of antenna modules includes a plurality of antenna elements and a plurality of phase shifters corresponding to the plurality of antenna elements, and Multiple amplifiers. Wherein, the baseband circuit is configured to store a first reference codebook, a second reference codebook, and a third reference codebook in a memory unit, and the first reference codebook is used to control the reference A plurality of phase shifters and a plurality of amplifiers of a plurality of the antenna units of the antenna module, and the first reference codebook has a first reference angle, and the second reference codebook has a second reference angle, The third reference code has a third reference angle. Wherein, the computing device is configured to perform a test procedure on the at least one calibration antenna module, which includes the following steps: configuring the baseband circuit according to a predetermined target field pattern, using the first reference codebook Multiple pieces of control data corresponding to the predetermined target field type control the reference antenna module, and respectively use the first reference codebook, the second reference codebook, and the third reference codebook corresponding to The multiple pieces of control data of the predetermined target field type control the at least one calibration antenna module to generate multiple test signals; configure a receiver to receive multiple test signals; configure the computing device to process multiple test signals Test signals to calculate equivalent isotropically radiated power (EIRP) of a plurality of the test signals in the predetermined target field type, and generate a plurality of test results; and configure the calculation device according to multiple The test results have the maximum equivalent isotropic radiation power to select and set one of the first reference codebook, the second reference codebook, and the third reference codebook as the calibration antenna At least one predetermined codebook used by the module to send and receive signals.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a beamforming device, which includes a processor, a memory unit, a baseband circuit, and a plurality of antenna modules. The baseband circuit is electrically connected to the processor and the memory unit. Each of the multiple antenna modules includes multiple antenna units and multiple phase shifters and multiple amplifiers corresponding to the multiple antenna units. Wherein, the memory unit stores a plurality of reference codebooks and instruction data, wherein each of the reference codebooks has a reference angle and is different from each other, and the instruction data is used to enable the plurality of antenna modules to transmit and receive When the signal is signaled, a predetermined codebook is designated from a plurality of the reference codebooks to control the plurality of antenna modules.

One of the beneficial effects of the present invention is that the beamforming device, the correction method and the correction system provided by the present invention use different phases and the reference codebook for a single antenna module to perform phase shifter correction. , The phase precision supported by the phase shifter can be effectively improved based on the reference angles corresponding to multiple reference codebooks, and the number of pre-stored codebooks and the correction time can be reduced.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "beamforming device, correction method and correction system" disclosed in the present invention. Those skilled in the art can understand the advantages of the present invention from the content disclosed in this specification. And effect. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

Fig. 1 is a block diagram of a correction system for a beamforming device according to an embodiment of the present invention. Referring to FIG. 1, the first embodiment of the present invention provides a correction system 1 for a beamforming device, which includes a beamforming device 10, a computing device 12 and a receiver 14.

The beamforming device 10 may include a processor 100, a memory unit 102, a baseband circuit 104, and a plurality of antenna modules 106-1, 106-2...106-M. Further reference may be made to FIG. 2, which is a schematic structural diagram of a beamforming apparatus according to an embodiment of the present invention. As shown in FIG. 2, the antenna modules 106-1, 106-2...106-M each include a plurality of antenna units and a plurality of phase shifters and a plurality of amplifiers respectively corresponding to the plurality of antenna units. For example, the antenna module 106-1 may include antenna units AT11, AT12...AT1N, and phase shifters PS11, PS12...PS1N and amplifier circuits AP11, AP12...AP1N respectively corresponding to the antenna units AT11, AT12...AT1N. The phase shifters PS11, PS12...PS1N can set different moving phases for individual antenna units AT11, AT12...AT1N, and the amplifier circuits AP11, AP12...AP1N can each include multiple amplifiers to amplify the phase shifters PS11, PS12...PS1N The phase-shifted signal is not limited to the number shown in Figure 2 to achieve the desired beamforming.

In addition, the processor 100 may be, for example, a microcontroller, a microprocessor, or a digital signal processor (DSP), which is used to obtain a codebook (codebook) from the memory unit 102. ) To assign the corresponding phase and amplifier parameters to the antenna units AT11, AT12...AT1N, and the baseband circuit 104 may be, for example, a baseband processor, which controls the antenna module 106 based on the assigned phase and amplifier parameters. -1, 106-2...106-M.

The antenna module 106-1 may also include a digital to analog converter (DAC) to convert the base frequency digital signal from the base frequency circuit 104 into an analog radio frequency signal. Similarly, the antenna module 106-2 may include antenna units AT21, AT22...AT2N, and phase shifters PS21, PS22...PS2N and amplifier circuits AP21, AP22...AP2N respectively corresponding to the antenna units AT21, AT22...AT2N.

The beamforming device 10 shown in FIG. 2 includes multiple antenna modules 106-1, 106-2...106-M, and the antenna modules 106-1, 106-2...106-M may There are many errors. When the beamforming device 10 has these hardware errors, it is possible that the main transmission direction of the composite beam is shifted, transmitted in the wrong direction, or the beam energy is attenuated due to the gain and phase error of the hardware, which will be difficult to achieve. Correct beamforming. For example, when designing a codebook for the antenna module 106-1, the phase difference θ1 between the baseband circuit 104 and the antenna module 106-1 itself is preset to be a fixed value, and the structure of the antenna module 106-2 is similar to that of the antenna module 106-1. The antenna module 106-1 is the same. Theoretically, the phase difference θ2 of the baseband circuit 104 plus the antenna module 106-2 itself should be the same as the phase difference θ1. However, in reality, different radio frequency integrated circuits may cause problems. The predicted phase deviation, if the same codebook is used for control, may directly affect the angle and SLL of the maximum EIRP of beamforming. Considering the influence caused by hardware errors, it is necessary to adopt the correction system and correction method for the beamforming device of the present invention.

Generally speaking, under the architecture of FIG. 1, when beamforming is performed by synchronously controlling the antenna modules 106-1, 106-2,..., 106-M, the system gain can be improved. When designing the codebook for the above-mentioned antenna modules 106-1, 106-2,..., 106-M, the corresponding phase shifters (such as phase shifters PS11, PS12...PS1N and phase shifters PS21, PS22...PS2N) to adjust the phase deviation between different antenna modules.

However, the aforementioned calibration precision is still difficult to meet the precision requirements of beamforming modules currently operating at the millimeter wave level. To this end, the present invention further provides a correction method for the beamforming device based on the above-mentioned method. In the present invention, the antenna modules 106-1, 106-2...106-M may include a reference antenna module and at least one calibration antenna module. For example, the antenna module 106-1 may be set as a reference antenna module, Then the antenna modules 106-2...106-M are set as calibration antenna modules.

In this embodiment, the computing device 12 may be a microcontroller, a microprocessor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). , Digital logic circuits, mobile computing devices, computers and other electronic devices that can provide computing capabilities. In one embodiment, the computing device 12 may be a computer, which is configured to be electrically connected to the receiver 14 to obtain required information from the receiver 14.

The receiver 14 is, for example, a horn antenna, a wireless base station, or a mobile device. The beamforming device 10 and the receiver 14 can communicate through wireless signal transmission. The receiver 20 may include, for example, a power sensor for detecting the strength of the wireless signal from the beamforming device 10. The receiver 20 can measure the signal strength of the beamforming device 10 at different angles.

Please refer to FIG. 3 below, which is a flowchart of a calibration method for a beamforming device according to an embodiment of the present invention. Referring to FIG. 3, an embodiment of the present invention provides a calibration method for a beamforming device, which is applicable to the calibration system 1 of the foregoing embodiment, and includes at least the following steps:

Step S100: Configure the baseband circuit 104 to store the first reference codebook REF1, the second reference codebook REF2, and the third reference codebook REF3 in the memory unit. Wherein, the first reference codebook REF1 is used to control multiple phase shifters and multiple amplifiers of multiple antenna units of the reference antenna module. Wherein, the first reference codebook REF1 includes multiple reference control data, divided by multiple target field types, and multiple reference control data are used to set multiple antenna elements of the reference antenna module and correspond to multiple antenna elements respectively Multiple phase shifters and multiple amplifiers.

For example, the first reference codebook REF1 can be as shown in Table 1 below:

Table 1 Reference codebook Antenna unit 1 Antenna unit 2 ... Antenna unit N Field Type 1 Phase 0 degree 90 degrees 180 degree Amplifier open open shut Field Type 2 Phase 0 degree 90 degrees 180 degree Amplifier open open shut ... Field Type L Phase 0 degree 90 degrees ... 180 degree Amplifier open open shut

In the first reference codebook REF1, multiple reference control data include multiple phase shifter reference parameters and multiple amplifier reference parameters for setting multiple antenna units of the reference antenna module, and multiple phase shifter reference parameters Corresponding to multiple reference phases, and multiple amplifier reference parameters corresponding to multiple switch state codes used to indicate the switch states of multiple amplifiers (for example, turn on is represented by 1 and turn off is represented by 0). As shown in Table 1, the first reference codebook REF1 may include multiple reference control data for field type 1 to field type L. Field type 1 to field type L are radiation field types directed at different angles. Each control data includes the phase of the phase shifter corresponding to the antenna unit 1, the antenna unit 2 to the antenna unit N, and the parameters for turning on or off the amplifier. Wherein, the phase shifter may be, for example, a 2-bit phase shifter, and the switchable phases are 0 degrees, 90 degrees, 180 degrees, and 270 degrees respectively, which can be used as the aforementioned reference phases, but the present invention is not limited thereto.

Among them, taking each antenna module with 6 antenna units as an example, the first reference codebook REF1 generation method can refer to Figure 4, Figure 5A, Figure 5B and Figure 5C, Figure 4 is used to generate the embodiment of the present invention The flowchart of the manner of referring to the codebook, FIGS. 5A to 5C are schematic diagrams of multiple phases used to generate the first reference codebook according to an embodiment of the present invention.

As shown in Figure 4, the correction method used for the beamforming device further includes:

Step S1000: Obtain an initial codebook. The initial codebook has multiple antenna phases of multiple antenna elements of the reference antenna module.

As shown in FIG. 5A, for example, the antenna module 106-1 is set as the reference antenna module, and the field type 1 is set at the same time, for example, the field type 1 (assuming a 0 degree angle, that is, the beamforming device 10 or the receiver 14 The electric field information measured at the angle between), the initial phases of the antenna elements AT11, AT12, AT13, AT14, AT15, and AT16 of the antenna module 106-1 shown in FIG. 5A can be measured to be 80, 223, 145, 113, 283, 119 degrees. Then, for other angles, the angle between the two can be changed by rotating the beamforming device 10 or the receiver 14, and the initial angles under other field types can be generated in the same way to obtain the initial code Book.

Step S1001: Use one of the multiple antenna phases as a reference antenna phase, and adjust the multiple antenna phases according to the reference antenna phase to generate multiple adjusted antenna phases.

Among them, if the signal generated by the antenna unit AT11 is the strongest, the antenna unit AT11 can be used as the reference, and the initial phases of the antenna units AT12, AT13, AT14, AT15, and AT16 can be shifted by -80 degrees respectively by 223, 145, 113, 283, and 119 degrees. The phases of the antenna elements AT12, AT13, AT14, AT15, and AT16 are changed to 143, 65, 33, 203, and 39 degrees, as shown in FIG. 5B. The initial codebook has an initial precision determined by the number of precision bits supported by the phase shifter.

Step S1002: Based on the first reference angle, the second reference angle, and the third reference angle, the phases of the multiple adjustment antennas are adjusted with multiple phase shifter parameters respectively, so that the phases of the multiple adjustment antennas are located based on the first reference angle and the second reference angle. The angle and the third reference angle are within a predetermined phase range, and the difference between the first reference angle, the second reference angle, and the third reference angle is minimized, and multiple antenna phases to be tested are generated at the same time.

In detail, by adjusting the phase shifters corresponding to the antenna units AT12, AT13, AT14, AT15, and AT16, the phases of the antenna units AT12, AT13, AT14, AT15, and AT16 can be adjusted based on a phase reference value, such as 0 degrees. . Since the radio frequency circuit of the antenna module 106-1 has a built-in phase shifter PS11~PS1N with a precision of 2 bits, it can ^{be minimized by 360/2 2} =90 degrees to achieve phase matching. In this embodiment , The first reference angle is set to 0 degrees, and the phases of the antenna units AT12, AT13, AT14, AT15, and AT16 are adjusted with the phase shifter parameters of 180 degrees, 270 degrees, 0 degrees, 180 and 0 degrees, respectively, to obtain 323 degrees, 337 degrees, 33 degrees, 383 degrees, and 39 degrees. Since the phase is cycled by 360 degrees, phases of -37 degrees, -25 degrees, 33 degrees, 23 degrees, and 39 degrees are obtained, which is the closest to the first reference. The angle is 0 degrees. At this time, the first reference codebook REF is obtained in the predetermined field type of field type 1 (0 degree angle), and the phase shifter parameters corresponding to the antenna units AT12, AT13, AT14, AT15 and AT16 are respectively 180 degrees and 270 degrees. , 0 degrees, 180 and 0 degrees. Other field types can be adjusted in a similar manner to generate the first reference codebook REF1.

In the above embodiment, the first reference codebook REF1 can be directly used to control the reference antenna module (that is, the antenna module 106-1) to send and receive signals. Next, an antenna for calibrating the antenna module needs to be generated. The first reference codebook REF1, the second reference codebook REF2, and the third reference codebook REF3 of the modules 106-2,...,106-M.

It should be noted that the first reference codebook REF1 has a first reference angle, the second reference codebook REF2 has a second reference angle, and the third reference codebook REF3 has a third reference angle. Here, the so-called first reference angle can be traced back to Fig. 4B and Fig. 4C. During the process from Fig. 4B to Fig. 4C, the phase shifters corresponding to the antenna units AT12, AT13, AT14, AT15, and AT16 have been adjusted so that the antenna unit AT12 The phases of AT13, AT14, AT15, and AT16 are based on a phase reference value, such as 0 degrees, and the phase reference value (0 degrees) corresponding to the first reference codebook REF1 is the first reference angle. In some embodiments, the second reference angle and the third reference angle may be different from the first reference angle by a predetermined angle, for example, 45 degrees. Therefore, the second reference angle and the third reference angle may be 45 degrees and respectively. -45 degree.

Therefore, for the calibration antenna module, the same process as the above-mentioned FIG. 5A to FIG. 5C is used to generate the second reference codebook REF2 with the second reference angle.

Refer to FIGS. 6A, 6B, and 6C. FIGS. 6A to 6C are schematic diagrams of multiple phases used to generate a second reference codebook according to an embodiment of the present invention. As shown in FIGS. 6A, 6B, and 6C, for example, to set the field type 1, such as the electric field information measured at an angle of 0 degrees, the antenna unit of the antenna module 106-1 shown in FIG. 5A can be used to measure The initial phases of AT11, AT12, AT13, AT14, AT15, and AT16 are shifted by -80 degrees as the initial phases of the antenna elements AT21, AT22, AT23, AT24, AT25, and AT26 of the antenna module 106-2, which are 0, 143, 65, 33, 203, 39 degrees. Then, by adjusting the phase shifters corresponding to the antenna units AT21, AT22, AT23, AT24, AT25, and AT26, the phases of the antenna units AT21, AT22, AT23, AT24, AT25, and AT26 are based on another phase reference value (that is, the second phase shifter). Reference angle), such as 45 degrees. Since the RF circuit of the antenna module 106-2 has a built-in phase shifter PS21~PS2N with a precision of 2 bits, it can ^{be minimized by 360/2 2} =90 degrees. Phase matching, that is, adjusting the phase of the antenna units AT21, AT22, AT23, AT24, AT25 and AT26 with phase shifter parameters of 0 degree, 270 degree, 0 degree, 0 degree, 180 degree and 0 degree respectively to obtain 0 degree , 413 degrees, 65 degrees, 33 degrees, 383 degrees, and 39 degrees. Since the phase cycle is 360 degrees, the phases of 0 degrees, 53 degrees, 65 degrees, 33 degrees, 23 degrees, and 39 degrees are obtained equivalently, that is, The closest to the second reference angle, which is 45 degrees. At this time, the second reference codebook REF2 is obtained in a predetermined field pattern at an angle of 0 degrees, and the phase shifter parameters corresponding to the antenna units AT21, AT22, AT23, AT24, AT25, and AT26 are 0 degrees, 270 degrees, and 0 degrees, respectively. , 0 degrees, 180 degrees and 0 degrees. Among them, the phase adjusted by the phase shifter has the smallest phase difference between 0 degrees, 53 degrees, 65 degrees, 33 degrees, 23 degrees, and 39 degrees, and 45 degrees, respectively.

Then, for other angles, since the rotating beamforming device 10 or the receiver 14 in the initial codebook has generated phases in other field types, these phases can be minimized in a similar manner with respect to the second reference angle (45 degrees). In this way, the second reference codebook REF2 is obtained.

A similar approach can also be used to generate a third reference codebook REF3 with a third reference angle. Refer to FIGS. 7A, 7B, and 7C. FIGS. 7A to 7C are schematic diagrams of multiple phases used to generate a third reference codebook according to an embodiment of the present invention. As shown in Fig. 7A, Fig. 7B and Fig. 7C, for example, setting the field pattern 1, such as the electric field information measured at an angle of 0 degrees, can be used to measure the antenna unit of the antenna module 106-1 shown in Fig. 4A The initial phases of AT11, AT12, AT13, AT14, AT15, and AT16 are shifted by -80 degrees as the initial phases of the antenna elements AT21, AT22, AT23, AT24, AT25, and AT26 of the antenna module 106-2, which are 0, 143, 65, 33, 203, 39 degrees. Then, by adjusting the phase shifters corresponding to the antenna units AT21, AT22, AT23, AT24, AT25, and AT26, the phases of the antenna units AT21, AT22, AT23, AT24, AT25, and AT26 are based on another phase reference value (that is, the third Reference angle), such as -45 degrees. Since the RF circuit of the antenna module 106-2 has a built-in phase shifter PS21~PS2N with a precision of 2 bits, it can ^{be minimized by 360/2 2} =90 degrees. Achieve phase matching, that is, adjust the phases of the antenna units AT21, AT22, AT23, AT24, AT25 and AT26 with phase shifter parameters of 0 degrees, 180 degrees, 270 degrees, 270 degrees, 90 degrees, and 270 degrees to obtain 0 Degrees, 323 degrees, 335 degrees, 303 degrees, 293 degrees, and 309 degrees. Since the phase cycle is 360 degrees, it is equivalent to 0 degrees, -37 degrees, -25 degrees, -57 degrees, -67 degrees and -51 Degree phase. At this time, the third reference codebook REF3 is obtained in a predetermined field pattern with an angle of 0 degrees, and the phase shifter parameters corresponding to the antenna units AT21, AT22, AT23, AT24, AT25, and AT26 are 0 degrees, 180 degrees, and 270 degrees, respectively. , 270 degrees, 90 degrees and 270 degrees. Among them, the phase adjusted by the phase shifter has the smallest phase difference between 0 degrees, -37 degrees, -25 degrees, -57 degrees, -67 degrees, and -51 degrees, and -45 degrees, respectively.

Then, for other angles, since the rotating beamforming device 10 or the receiver 14 has already generated the phases in other field types in the initial codebook, these phases can be compared to the third reference angle (-45 degrees) in a similar manner. Minimize, thereby obtaining the third reference codebook REF3.

In an alternative embodiment, the first reference angle, the second reference angle, and the third reference angle are not limited to the 0, 45 degrees, and -45 degrees described in the foregoing embodiment, and may also be 0, 30 degrees, and -30 degrees.

Step S1003: Generate a first reference codebook, a second reference codebook, and a third reference codebook according to the phases of the multiple antennas to be tested.

Returning to the calibration method of the present invention, proceed to step S101: perform a test procedure on the at least one calibration antenna module. Here, the test procedure includes the following steps.

Step S102: Configure the baseband circuit according to a predetermined target field type, control the reference antenna module with multiple control data corresponding to the predetermined target field type in the first reference codebook, and use the first reference codebook and the second reference codebook respectively. The multiple control data corresponding to the predetermined target field pattern in the codebook and the third reference codebook control the calibration antenna module to generate multiple test signals.

Step S103: Configure the receiver 14 to receive multiple test signals.

Step S104: Configure the computing device 12 to process a plurality of test signals to respectively calculate Equivalent isotropically radiated power (EIRP) of the plurality of test signals in a predetermined target area, and generate a plurality of test results.

Step S105: The configuration calculating device 12 sets the codebook with the maximum equivalent omnidirectional radiation power as the predetermined codebook used when the antenna module is calibrated to transmit and receive signals according to the multiple test results. For example, when calibrating the antenna module 106-2, the maximum equivalent isotropic radiation power can be obtained with the first reference codebook REF1, which means that the antenna module 106-2 and the antenna module 106- 1 It has the smallest phase difference when transmitting and receiving signals at the same time. In other words, it can eliminate the hardware error between the antenna modules 106-1 and 106-2. Therefore, the first reference codebook REF1 can be set as the predetermined codebook used by the antenna module 106-2 when transmitting and receiving signals.

Then, the computing device 12 can be further configured to generate the instruction data INS based on the above steps and store it in the memory unit 102, so that when the beamforming device 10 transmits and receives signals in a plurality of predetermined target field patterns, the baseband circuit 104 can be based on the predetermined target field patterns. When transmitting and receiving signals, corresponding predetermined codebooks are obtained from the first reference codebook REF1, the second reference codebook REF2, and the third reference codebook REF3 to control the antenna modules 106-1 to 106-M.

Therefore, after applying the calibration method for a beamforming device of the present invention, a beamforming device 10 as shown in FIG. 1 can be further provided, which includes a processor 100, a memory unit 102, a baseband circuit 104, and multiple antennas. Modules 106-1 to 106-M. The memory unit 102 stores a first reference codebook REF1, a second reference codebook REF2, a third reference codebook REF3, and indication data INS. The first reference codebook REF1, the second reference codebook REF2, and the third reference codebook REF3 Each includes multiple pieces of control data divided into multiple target field types, and the first reference codebook REF1, the second reference codebook REF2, and the third reference codebook REF3 each have a reference angle (that is, as described in the above embodiment). 0 degrees, 45 degrees and -45 degrees) and different from each other.

The instruction data INS is used to allow the antenna modules 106-1 to 106-M to transmit and receive signals, respectively, to designate a predetermined codebook from multiple reference codebooks to control the multiple antenna modules.

In a specific embodiment, when the system of the beamforming device 10 is initialized, its processor 100 can automatically read the instruction data INS from the memory unit 102, and reorganize the predetermined codebook indicated by the instruction data INS to generate a complete version The codebook can be used directly when the baseband circuit 104 controls the antenna modules 106-1 to 106-M to transmit and receive signals.

[Beneficial effects of the embodiment]

One of the beneficial effects of the present invention is that the beamforming device, the calibration method and the calibration system provided by the present invention can be generated based on the initial codebook of a single antenna module, which is applicable to multiple antenna modules and has different characteristics. The reference codebook of the reference angle, and the phase shifter correction is performed by testing the equivalent isotropic radiation power, which can effectively change the phase precision supported by the phase shifter to the reference angle corresponding to multiple reference codebooks. Upgrade, and can reduce the number of pre-stored codebooks and correction time.

The content disclosed above is only the preferred and feasible embodiments of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

1: Correction system of beamforming device 10: Beamforming device 12: Computing device 14: receiver 100: processor 102: memory unit 104: Fundamental frequency circuit 106-1, 106-2...106-M: Antenna Module AT11, AT12, AT13, AT14, AT15, AT16,..., AT1N, AT21, AT22, AT23, AT24, AT25, AT26,..., AT2N: antenna unit PS11, PS12...PS1N, PS21, PS22...PS2N: Phase shifter AP11, AP12...AP1N, AP21, AP22...AP2N: amplifier circuit θ2: Phase difference θ1: Phase difference REF1: The first reference codebook REF2: The second reference codebook REF3: The third reference codebook INS: instruction data

Fig. 1 is a block diagram of a correction system for a beamforming device according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a beamforming apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart of a correction method for a beamforming device according to an embodiment of the present invention.

Fig. 4 is a flowchart of a method for generating a reference codebook according to an embodiment of the present invention.

5A to 5C are schematic diagrams of multiple phases used to generate a first reference codebook according to an embodiment of the present invention.

6A to 6C are schematic diagrams of multiple phases used to generate a second reference codebook according to an embodiment of the present invention.

7A to 7C are schematic diagrams of multiple phases used to generate a third reference codebook according to an embodiment of the present invention.

1: Correction system of beamforming device

10: Beamforming device

12: Computing device

14: receiver

100: processor

102: memory unit

104: Fundamental frequency circuit

106-1, 106-2...106-M: Antenna Module

REF1: The first reference codebook

REF2: The second reference codebook

REF3: The third reference codebook

INS: instruction data

Claims (11)

A correction method for a beamforming device, used for a beamforming device including a processor, a memory unit, a baseband circuit, and a plurality of antenna modules, the plurality of antenna modules including a reference antenna module And at least one calibration antenna module, and each of the plurality of antenna modules includes a plurality of antenna units and a plurality of phase shifters and a plurality of amplifiers corresponding to the plurality of antenna units, and the calibration method includes: The memory unit is configured to store a first reference codebook, a second reference codebook, and a third reference codebook, wherein the first reference codebook is used to control a plurality of the antennas of the reference antenna module Unit multiple phase shifters and multiple amplifiers, and the first reference codebook has a first reference angle, the second reference codebook has a second reference angle, and the third reference code has a first reference angle. Three reference angles; and Performing a test procedure on the at least one calibration antenna module includes the following steps: The baseband circuit is configured to control the reference antenna module according to a predetermined target field pattern with multiple pieces of control data corresponding to the predetermined target field pattern in the first reference codebook, and use the first Multiple pieces of control data corresponding to the predetermined target field pattern in the reference codebook, the second reference codebook, and the third reference codebook control the at least one calibration antenna module to generate multiple test signals; Configuring a receiver to receive a plurality of the test signals; The calculation device is configured to process a plurality of the test signals to respectively calculate the Equivalent isotropically radiated power (EIRP) of the plurality of test signals in the predetermined target field pattern, and generate a plurality of tests Result; and The calculation device is configured to select and set one of the first reference codebook, the second reference codebook, and the third reference codebook according to the maximum equivalent isotropic radiation power among the multiple test results One is at least one predetermined codebook used by the calibration antenna module to transmit and receive signals. The correction method for a beamforming device according to claim 1, wherein the second reference angle and the third reference angle are different from the first reference angle by a predetermined angle, respectively. The correction method for a beamforming device as described in claim 1, further includes: Obtaining an initial codebook, the initial codebook having multiple antenna phases of the multiple antenna units of the reference antenna module; Use one of the multiple antenna phases as a reference antenna phase, and adjust the multiple antenna phases according to the reference antenna phase to generate multiple adjusted antenna phases; Based on the first reference angle, the second reference angle, and the third reference angle, the phases of a plurality of the adjustment antennas are adjusted with a plurality of phase shifter parameters respectively, so that the phases of the plurality of the adjustment antennas are located on the basis of the Within a predetermined phase range of the first reference angle, the second reference angle, and the third reference angle, and between the first reference angle, the second reference angle, and the third reference angle Minimize the difference between, resulting in multiple antenna phases to be tested; and The first reference codebook, the second reference codebook, and the third reference codebook are generated according to a plurality of the antenna phases to be tested. The correction method for a beamforming device as described in claim 3 further includes: Execute the test procedure for each of the at least one calibration antenna module to set the at least one predetermined codebook; and The initial codebook has an initial precision determined by a number of precision bits of the plurality of phase shifters. The calibration method for a beamforming device according to claim 1, further comprising recording the generated at least one predetermined codebook to generate an instruction data, and storing the instruction data in the memory unit, wherein the instruction data Is used to enable the baseband circuit to obtain the corresponding signal from the first reference codebook, the second reference codebook, and the third reference codebook when the baseband circuit transmits and receives signals according to the predetermined target field pattern. At least one predetermined codebook is used to control a plurality of the antenna modules. A correction system for a beamforming device, which includes: A computing device; A beamforming device connected to the computing device, the beamforming device comprising: A processor A memory unit; A baseband circuit; and A plurality of antenna modules includes a reference antenna module and at least one calibration antenna module, and each of the plurality of antenna modules includes a plurality of antenna elements and a plurality of phase shifters corresponding to the plurality of antenna elements, and Multiple amplifiers; A receiver; and A measuring device; The baseband circuit is configured to store a first reference codebook, a second reference codebook, and a third reference codebook in a memory unit, and the first reference codebook is used to control the reference antenna The multiple phase shifters and multiple amplifiers of the multiple antenna units of the module, and the first reference codebook has a first reference angle, the second reference codebook has a second reference angle, so The third reference code has a third reference angle; The computing device is configured to execute a test procedure on the at least one calibration antenna module, which includes the following steps: The baseband circuit is configured to control the reference antenna module according to a predetermined target field pattern with multiple pieces of control data corresponding to the predetermined target field pattern in the first reference codebook, and use the first Multiple pieces of control data corresponding to the predetermined target field pattern in the reference codebook, the second reference codebook, and the third reference codebook control the at least one calibration antenna module to generate multiple test signals; Configuring a receiver to receive a plurality of the test signals; The calculation device is configured to process a plurality of the test signals to respectively calculate the Equivalent isotropically radiated power (EIRP) of the plurality of test signals in the predetermined target field pattern, and generate a plurality of tests Result; and The calculation device is configured to select and set one of the first reference codebook, the second reference codebook, and the third reference codebook according to the maximum equivalent isotropic radiation power among the multiple test results One is at least one predetermined codebook used by the calibration antenna module to transmit and receive signals. The correction system for a beamforming device according to claim 6, wherein the second reference angle and the third reference angle are different from the first reference angle by a predetermined angle, respectively. The correction system for a beamforming device according to claim 6, wherein the calculation device is configured to: Obtaining an initial codebook, the initial codebook having multiple antenna phases of the multiple antenna units of the reference antenna module; Use one of the multiple antenna phases as a reference antenna phase, and adjust the multiple antenna phases according to the reference antenna phase to generate multiple adjusted antenna phases; Based on the first reference angle, the second reference angle, and the third reference angle, the phases of a plurality of the adjustment antennas are adjusted with a plurality of phase shifter parameters respectively, so that the phases of the plurality of the adjustment antennas are located on the basis of the Within a predetermined phase range of the first reference angle, the second reference angle, and the third reference angle, and between the first reference angle, the second reference angle, and the third reference angle Minimize the difference between, and generate multiple antenna phases to be tested at the same time; and The first reference codebook, the second reference codebook, and the third reference codebook are generated according to a plurality of the antenna phases to be tested. The calibration system for a beamforming device according to claim 8, wherein the computing device is configured to execute the test program on each of the at least one calibration antenna module to set the at least one predetermined codebook ； The initial codebook has an initial precision determined by a number of precision bits of the plurality of phase shifters, and the at least one predetermined codebook has a correction precision higher than the initial precision . The calibration system for a beamforming device according to claim 6, wherein the computing device is configured to record the generated at least one predetermined codebook to generate an instruction data, and store it in the memory unit , Wherein the instruction data is used to enable the baseband circuit to transmit and receive signals according to the predetermined target field type from the first reference codebook, the second reference codebook, and the third reference codebook Obtain the corresponding at least one predetermined codebook to control a plurality of the antenna modules. A beamforming device includes: A processor A memory unit; A baseband circuit electrically connected to the processor and the memory unit; and A plurality of antenna modules, and each of the plurality of antenna modules includes a plurality of antenna units and a plurality of phase shifters and a plurality of amplifiers corresponding to the plurality of antenna units, The memory unit stores a plurality of reference codebooks, wherein the multiple reference codebooks respectively have a reference angle and are different from each other; An instruction data is used to designate a predetermined codebook from the multiple reference codebooks to control the multiple antenna modules when the multiple antenna modules transmit and receive signals.

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