Electronic device including multiple flat panel antennas and method of operating the same

Abstract

An electronic device and an operating method thereof are provided. The electronic device includes a plurality of planar antennas and stores information about a plurality of codebooks, and the operating method of the electronic device includes: determining at least one planar antenna among the plurality of planar antennas based on environmental information; receiving control information from a base station; and selecting an optimal codebook among the plurality of codebooks based on the determined at least one planar antenna and the received control information.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims the benefit of priority from Korean Patent Application No. 10-2019-0043303, filed on April 12, 2019, and Korean Patent Application No. 10-2019-0095171, filed on August 5, 2019, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure relates to a wireless communication system, and more particularly, to an optimal codebook based beamforming of an electronic device including a plurality of panel antennas in the wireless communication system. Background Art

[0004] Recently, efforts have been made to develop enhanced 5G communication systems or pre-5G communication systems to meet the growing demand for wireless data services since the commercialization of the fourth generation (4G) communication system. For this reason, the 5G communication system or pre-5G communication system is called a super 4G network communication system or a post-long term evolution (LTE) system.

[0005] In order to achieve a high data transmission rate, a 5G communication system is implemented in an ultra-high frequency (millimeter wave) band (e.g., a 60-GHz band). Moreover, in order to reduce the path loss of electronic waves and increase the transmission distance of electronic waves in the ultra-high frequency band used for the 5G communication system, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, digital beamforming, hybrid beamforming, and massive antenna technology have been discussed. Summary of the invention

[0006] The present disclosure provides an electronic device for selecting an optimal codebook based on environmental information, the electronic device having a plurality of planar antennas.

[0007] According to one aspect of the present disclosure, there is provided an operating method of an electronic device having multiple flat panel antennas and storing information about multiple codebooks, the operating method comprising: determining at least one flat panel antenna among the multiple flat panel antennas based on environmental information corresponding to one or more of the multiple flat panel antennas; receiving control information from a base station; and selecting an optimal codebook among the multiple codebooks based on the determined at least one flat panel antenna and the received control information.

[0008] According to another aspect of the present disclosure, an electronic device is provided, comprising: a communication interface including multiple flat panel antennas; a storage device storing information about multiple codebooks; and a controller configured to determine at least one flat panel antenna among the multiple flat panel antennas based on environmental information corresponding to one or more of the multiple flat panel antennas, receive control information from a base station by using the communication interface, and select an optimal codebook among the multiple codebooks based on the determined at least one flat panel antenna and the received control information.

[0009] According to one aspect of the present disclosure, a wireless communication system is provided, including: a base station, which is configured to transmit control information to an electronic device; and an electronic device, which is configured to: determine at least one of the multiple flat panel antennas based on environmental information corresponding to one or more of the multiple flat panel antennas, select an optimal codebook among the multiple codebooks based on the determined at least one flat panel antenna and the control information, and perform beamforming based on the selected optimal codebook, wherein the environmental information includes at least one of temperature information, power consumption information, and channel state information of each of the multiple flat panel antennas, and wherein the control information includes timing information about a time interval for transmitting a reference signal for beam scanning and beam-related configuration information.

[0010] According to one aspect of the present disclosure, an electronic device is provided, comprising: a memory storing one or more instructions; and a processor configured to execute the one or more instructions to: determine at least one flat panel antenna among a plurality of flat panel antennas based on information corresponding to one or more flat panel antennas among the plurality of flat panel antennas; receive control information from a base station; and select an optimal codebook among a plurality of codebooks based on the determined at least one flat panel antenna and the received control information. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Embodiments of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0012] Figure 1 A wireless communication system according to an example embodiment of the present disclosure is shown;

[0013] Figure 2 is a block diagram of a base station according to an example embodiment of the present disclosure;

[0014] Figure 3A is a block diagram of an electronic device according to an example embodiment of the present disclosure;

[0015] Figure 3B is a diagram of an arrangement of a plurality of flat panel antennas according to an example embodiment of the present disclosure;

[0016] Figure 4 is a block diagram of a communication interface according to an example embodiment of the present disclosure;

[0017] Figure 5 is a flow chart of beamforming performed by an electronic device according to an example embodiment of the present disclosure;

[0018] Fig. 6A is a flow chart of selecting a flat panel antenna according to temperature information performed by an electronic device according to an example embodiment of the present disclosure;

[0019] Figure 6B is a flow chart of selecting a flat panel antenna according to holding information, performed by an electronic device, according to another exemplary embodiment of the present disclosure;

[0020] Figure 6C is a flow chart of selecting a flat panel antenna according to power information, performed by an electronic device according to another exemplary embodiment of the present disclosure;

[0021] Fig.6D is a flowchart of selecting a panel antenna based on a channel state, performed by an electronic device according to another exemplary embodiment of the present disclosure;

[0022] Figure 7 is a flowchart of selecting an optimal codebook executed by an electronic device according to another exemplary embodiment of the present disclosure;

[0023] Figure 8 shows an example of mutual coupling between antenna elements according to an example embodiment of the present disclosure;

[0024] Fig.9A An example of analog / digital beamforming according to an example embodiment of the present disclosure is shown;

[0025] Fig. 9B Another example of analog / digital beamforming according to another example embodiment of the present disclosure is shown; and

[0026] Fig.10 is a flowchart of selecting an optimal beam pattern performed by an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] Figure 1 A wireless communication system according to an example embodiment of the present disclosure is shown.

[0028] refer to Figure 1 According to an exemplary embodiment, a base station 110 and an electronic device 120 are provided in a wireless communication system 1. The base station 110 and the electronic device 120 may be illustrated as nodes using a radio channel in the wireless communication system 1.

[0029] The base station 110 is a network infrastructure that provides wireless connection to the electronic device 120. The base station 110 may have coverage, which is defined as a specific geographical area based on the distance over which a signal can be transmitted. The base station 110 may be replaced by "access point (AP)", "eNodeB (eNB)", "fifth generation (5G) node", "wireless point" or other terms having equivalent technical meanings.

[0030] According to various exemplary embodiments of the present disclosure, the base station 110 may be connected to one or more “transmission / reception points (TRPs)”. The base station 110 may transmit a downlink signal to the electronic device 120 or receive an uplink signal from the electronic device 120 through one or more TRPs.

[0031] The electronic device 120 is a device used by a user and can communicate with the base station 110 through a radio channel. The electronic device 120 may be replaced by "terminal", "user equipment (UE)", "mobile station", "subscriber station", "customer premises equipment (customerpremises equipment, CPE)", "remote terminal", "wireless terminal", "user equipment" or other terms with equivalent technical meanings.

[0032] The base station 110 and the electronic device 120 can transmit and receive radio signals in a millimeter wave frequency band (e.g., 28 GHz, 30 GHz, 38 GHz, or 60 GHz). In order to overcome the high attenuation characteristics of millimeter waves, the base station 110 and the electronic device 120 can perform beamforming. Here, beamforming may include transmission beamforming and reception beamforming. That is, the base station 110 and the electronic device 120 can give directionality to the transmission signal or the reception signal. To this end, the base station 110 and the electronic device 120 can select the optimal beam for wireless communication through beam searching, beam training, or beam management processes.

[0033] Figure 2 is a block diagram of a base station according to an example embodiment of the present disclosure.

[0034] refer to Figure 2 , the base station 110 may include a wireless communication interface 210 , a backhaul communication interface 220 , a storage device 230 , and a controller 240 .

[0035] The wireless communication interface 210 can perform functions for transmitting and receiving signals through a radio channel. According to an exemplary embodiment of the present disclosure, the wireless communication interface 210 can perform a conversion function between a baseband signal and a bit stream according to the physical layer standard of the system. For example, the wireless communication interface 210 can generate complex symbols by encoding and modulating the transmission bit stream during data transmission, and restore the received bit stream by demodulating and decoding the baseband signal during data reception. In addition, the wireless communication interface 210 can up-convert the baseband signal to a radio frequency (RF) band signal, and then transmit the RF band signal through an antenna, or down-convert the RF band signal received by the antenna to a baseband signal. To this end, the wireless communication interface 210 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog converter (DAC), an analog to digital converter (ADC), etc.

[0036] Moreover, the wireless communication interface 210 can transmit and receive signals. For example, the wireless communication interface 210 can transmit synchronization signals, reference signals, system information, messages, control information, data, etc. In addition, the wireless communication interface 210 can perform beamforming. The wireless communication interface 210 can apply beamforming weights to the signals to be transmitted or received in order to give the signals directionality. The wireless communication interface 210 can repeatedly transmit signals by changing the beam to be formed.

[0037] According to an example embodiment, backhaul communication interface 220 may provide an interface for communicating with other nodes in the network. That is, backhaul communication interface 220 may convert a bit stream to be transmitted from base station 110 to another node (e.g., another access node, another base station, a parent node, a core network, etc.) into a physical signal, and convert a physical signal received from another node into a bit stream.

[0038] According to an example embodiment, storage device 230 may store basic programs, application programs, and data such as configuration information for operations of base station 110. Storage device 230 may include volatile memory, nonvolatile memory, or a combination of volatile memory and nonvolatile memory.

[0039] According to an example embodiment, the controller 240 may control the operation of the base station 110. For example, the controller 240 transmits and receives signals through the wireless communication interface 210 or the backhaul communication interface 220. In addition, the controller 240 writes data in the storage device 230 and reads data from the storage device 230. To this end, the controller 240 may include at least one processor.

[0040] Figure 3A is a block diagram of an electronic device according to an example embodiment of the present disclosure.

[0041] refer to Figure 3A , the electronic device 120 may include a communication interface 310 , a storage device 320 , and a controller 330 .

[0042] The communication interface 310 performs functions for transmitting and receiving signals through a radio channel. For example, the communication interface 310 performs a conversion function between a baseband signal and a bit stream according to the physical layer standard of the system. For example, the communication interface 310 can generate complex symbols by encoding and modulating the transmission bit stream during data transmission, and restore the received bit stream by demodulating and decoding the baseband signal during data reception. In addition, the communication interface 310 can up-convert the baseband signal to an RF frequency band signal, and then transmit the RF frequency band signal through an antenna, or down-convert the RF frequency band signal received by the antenna to a baseband signal. For example, the communication interface 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. The communication interface 310 may perform beamforming. The communication interface 310 may apply beamforming weights to the signal to be transmitted or received so as to give the signal directionality. According to various exemplary embodiments of the present disclosure, the communication interface 310 may include a plurality of flat panel antennas, such as a first flat panel antenna 310-1 to an Nth flat panel antenna 310-N. According to example embodiments, each of the plurality of planar antennas 310 - 1 through 310 -N may include an array antenna and may be arranged at any location of the electronic device 120 .

[0043] The communication interface 310 can transmit and receive signals. The communication interface 310 can receive downlink signals. Downlink signals may include synchronization signals (synchronization signal, SS), reference signals (reference signal, RS), system information, configuration messages, control information, downlink data, etc. In addition, the communication interface 310 can transmit uplink signals. Uplink signals may include random access related signals or reference signals (e.g., sounding reference signals (sounding reference signals, SRS), or demodulation reference signals (demodulation reference signals, DM-RS)), uplink data, etc.

[0044] The storage device 320 may store basic programs, application programs, and data such as configuration information for the operation of the electronic device 120. The storage device 320 may include a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. In addition, the storage device 320 may provide the stored data in response to a request of the controller 330. According to various embodiments of the present disclosure, the storage device 320 may include a codebook storage device 325 storing information about a plurality of codebooks. The codebook storage device 325 may pre-store information such as beamforming weights for performing optimal beamforming using at least one planar antenna selected for wireless communication among the plurality of planar antennas 310-1 to 310-N.

[0045] The controller 330 controls the general operation of the electronic device 120. For example, the controller 330 can transmit and receive signals through the communication interface 310. In addition, the controller 330 can write data in the storage device 320 and read data from the storage device 320. To this end, the controller 330 may include at least one processor or microprocessor, or may be a part of a processor. When the controller 330 is a part of a processor, the communication interface 310 and a part of the controller 330 may be referred to as a communication processor (CP).

[0046] The controller 330 may include a codebook determination circuit 331, a channel state monitoring circuit 332, and a power monitoring circuit 333. The channel state monitoring circuit 332 may monitor the channel states of the plurality of planar antennas 310-1 to 310-N, and the power monitoring circuit 333 may monitor the power consumption values ​​of the plurality of planar antennas 310-1 to 310-N. For example, the channel state monitoring circuit 332 and the power monitoring circuit 333 may periodically transmit a reference signal received power (RSRP) value and a power consumption value of each of the plurality of planar antennas 310-1 to 310-N to the codebook determination circuit 331.

[0047] Codebook determination circuit 331 may determine at least one of the plurality of planar antennas 310-1 to 310-N according to the environmental information, and select an optimal codebook according to the scenario of electronic device 120. For example, a planar antenna for performing wireless communication may be determined by considering the temperature and power consumption of each planar antenna, and a codebook optimized for a usage scenario such as beam coverage or beam width may be determined among a plurality of codebooks corresponding to the determined planar antenna.

[0048] According to an example embodiment, the controller may communicate with one or more sensors, such as a temperature sensor 341 and a proximity sensor 342. The temperature sensor 341 and the proximity sensor 342 are provided as examples, but the present disclosure is not limited thereto. Therefore, according to another example embodiment, other types of sensors may be provided.

[0049] Figure 3B is a diagram of an arrangement of a plurality of flat panel antennas according to an example embodiment of the present disclosure.

[0050] refer to Figure 3B , electronic device 120 may include a plurality of planar antennas. For example, electronic device 120 may include first planar antenna 310 - 1 to fourth planar antenna 310 - 4 arranged at corners of electronic device 120 .

[0051] Each of the plurality of flat panel antennas 310-1 to 310-N may include a plurality of array antennas. For example, the first flat panel antenna 310-1 may include a first array antenna 311, a second array antenna 312, and a third array antenna 313. The array antennas included in the same flat panel antenna may be array antennas of different types. The first array antenna 311 may correspond to a patch array, and the second array antenna 312 and the third array antenna 313 may correspond to a dipole array. The second array antenna 312 and the third array antenna 313 may form beams in the lateral direction, respectively, and the first array antenna 311 may form a beam in a vertical direction relative to the plane of the electronic device 120.

[0052] Each of the array antennas may include a plurality of antenna elements. Each of the plurality of antenna elements included in the second array antenna 312 and the third array antenna 313 may correspond to a dipole antenna element, and each of the plurality of antenna elements included in the first array antenna 311 may correspond to a patch antenna element.

[0053] Although the array antenna and the antenna element have been described in the above embodiments with reference to the dipole antenna and the patch antenna, the embodiments are not limited thereto. In addition, although the above embodiments have been described with reference to the four planar antennas arranged in the corners of the electronic device 120, multiple planar antennas (e.g., the Kth planar antenna to the Nth planar antenna, including the Pth planar antenna and the Mth planar antenna) may also be arranged.

[0054] Figure 4 is a block diagram of a communication interface according to an example embodiment of the present disclosure.

[0055] According to various embodiments of the present disclosure, Figure 4 Shows Figure 3A An example of a detailed configuration of the communication interface 310 is shown in FIG. Figure 4 , the communication interface 310 may be a circuit including an encoder and modulator 410 , a digital beamformer 420 , a first transmission path 430 - 1 to an Nth transmission path 430 -N, and an analog beamformer 440 .

[0056] The encoder and modulator 410 performs channel coding. For channel coding, at least one of a low density parity check (LDPC) code, a convolutional code, and a polar code may be used. The encoder and modulator 410 generates modulation symbols by performing constellation mapping.

[0057] The digital beamformer 420 performs beamforming on a digital signal (e.g., a modulation symbol). To this end, the digital beamformer 420 multiplies the modulation symbol by a beamforming weight. Here, the beamforming weight is used to change the amplitude and phase of the signal, and may be referred to as a "precoding matrix", "precoder", etc. The digital beamformer 420 outputs the digital beamformed modulation symbol to the first transmission path 430-1 to the Nth transmission path 430-N. In this case, according to the MIMO transmission scheme, the modulation symbol may be multiplexed, or the same modulation symbol may be provided to the first transmission path 430-1 to the Nth transmission path 430-N.

[0058] The first transmission path 430-1 to the Nth transmission path 430-N converts the digital signal of the digital beam forming into an analog signal. To this end, each of the first transmission path 430-1 to the Nth transmission path 430-N may include an inverse fast Fourier transform (IFFT) arithmetic operator, a cyclic prefix (CP) inserter, a DAC and an up-converter. The CP inserter is used for orthogonal frequency division multiplexing (OFDM) scheme and can be excluded when another physical layer scheme (e.g., filter bank multi-carrier (FBMC)) is applied. That is, the first transmission path 430-1 to the Nth transmission path 430-N provide independent signal processing processes for multiple streams generated by digital beam forming. However, according to the embodiment, some components in the first transmission path 430-1 to the Nth transmission path 430-N can be used together. The analog beamformer 440 performs beamforming on the analog signal. To this end, the analog beamformer 440 multiplies the analog signal by a beamforming weight. Here, the beamforming weight is used to change the amplitude and phase of the signal.

[0059] although Figure 4An example based on a situation where a signal is transmitted to another electronic device (e.g., base station 110) is shown, but the exemplary embodiments of the present disclosure are not limited thereto. When a radio signal is received from another electronic device, the communication interface 310 may include a decoder and a demodulator and multiple receiving paths. For example, the communication interface 310 may receive a radio signal, convert the radio signal into a digital signal, and decode and demodulate the digital signal.

[0060] Figure 5 is a flowchart of beamforming performed by an electronic device according to an example embodiment of the present disclosure.

[0061] refer to Figure 5 In operation 510, the electronic device 120 may determine at least one flat panel antenna based on environmental information.

[0062] The environmental information may indicate information used by the electronic device 120 to determine which of the plurality of planar antennas 310-1 to 310-N is selected when transmitting a radio signal. The environmental information may be referred to as various terms, such as peripheral information or management information. The environmental information may include various pieces of information, including information about the temperature of each of the plurality of planar antennas 310-1 to 310-N, information indicating a channel state, information about the power consumption of the electronic device 120, information about the remaining battery capacity, and information about the shape in which the user holds the electronic device 120.

[0063] According to various exemplary embodiments of the present disclosure, the electronic device 120 may determine at least one flat panel antenna based on one or more pieces of environmental information. For example, the electronic device 120 may use only the temperature information in the environmental information. The electronic device 120 may select at least one flat panel antenna from among the flat panel antennas remaining by excluding the flat panel antennas exceeding the threshold temperature from the plurality of flat panel antennas 310-1 to 310-N for transmission and reception of radio signals. As another example, the electronic device 120 may determine at least one flat panel antenna based on the temperature information and power information in the environmental information. The electronic device 120 may select any number of flat panel antennas from among the flat panel antennas remaining by excluding the flat panel antennas exceeding the threshold temperature in order of lower power consumption. Reference will be made to the following. FIG. 6A to FIG. 6D Specific example embodiments for determining at least one panel antenna based on environmental information are described.

[0064] In operation 520, the electronic device 120 may receive control information from the base station 110. The control information may include information for searching for an optimal beam between the base station 110 and the electronic device 120. For example, the control information may include information about a time point (e.g., which symbol timing number in which subframe number) at which a reference signal for beam scanning is transmitted and the length of an interval at which the reference signal is transmitted. In addition, the control information may include beam-related configuration information requested by the base station 110 from the electronic device 120. For example, the control information may include information related to the characteristics required for the main lobe and the side lobe of the beam.

[0065] In operation 530 , the electronic device 120 may select an optimal codebook based on the determined panel antenna and control information received from the base station 110 .

[0066] According to various embodiments of the present disclosure, the electronic device 120 may pre-store information about a plurality of codebooks. The plurality of codebooks may correspond to all subsets obtainable using the plurality of flat panel antennas 310-1 to 310-N, respectively. For example, assuming that the number of flat panel antennas 310-1 to 310-N is 4, the plurality of codebooks may include codebook information about the following: four subsets including only one activated flat panel antenna, six subsets including two activated flat panel antennas, four subsets including three activated flat panel antennas, and one subset including all activated flat panel antennas. The electronic device 120 may include codebook information corresponding to a scenario preset for each subset. This will be organized as follows.

[0067] [Table 1]

[0068]

[0069]

[0070] Referring to Table 1, there are many subsets that can be combined corresponding to the plurality of planar antennas 310-1 to 310-N included in the electronic device 120, and codebooks corresponding to a plurality of scenarios using the activated planar antennas can be predefined for the subsets, respectively. Although Table 1 shows a case where the electronic device 120 includes four planar antennas, the present embodiment is not limited thereto, and various numbers of scenarios and various numbers of planar antennas can be used.

[0071] Each of the multiple scenarios (first to Kth scenarios) shown in Table 1 may be determined based on at least the beamforming area of ​​the electronic device 120 and the beam-related configuration information between the base station 110 and the electronic device 120. For example, the beamforming area may be determined based on information about beam coverage, beam width, and mobility of the electronic device 120, and the beam-related configuration information may include information about characteristics of a main lobe of the beam and characteristics of a side lobe of the beam.

[0072] According to various embodiments of the present disclosure, the electronic device 120 may select a flat panel antenna for transmission and reception of a radio signal based on environmental information, and determine a codebook that is optimal for the selected flat panel antenna. For example, the electronic device 120 may select a codebook according to a scenario in a subset corresponding to an activated flat panel antenna by considering the reception timing of a beam management channel state information reference signal (BM CSI-RS) that can be obtained from control information, the characteristics of the main lobe and side lobe of the beam, the beam coverage, the beam width, the mobility of the electronic device 120, etc.

[0073] In operation 540, the electronic device 120 may perform beamforming according to the selected codebook. The electronic device 120 may control the analog beamformer 440 and / or the digital beamformer 420 according to the analog beamforming parameters and the digital beamforming parameters stored in the selected codebook.

[0074] In operation 550, electronic device 120 may transmit information indicating the determined planar antenna to base station 110. The information indicating the determined planar antenna may be transmitted through signaling of initial attachment between electronic device 120 and base station 110, or by being included in periodic measurement report information of electronic device 120 or user equipment capability information.

[0075] According to the present disclosure, the order of operations 510 to 550 is not limited to Figure 5 According to other exemplary embodiments of the present disclosure, the order of operations may be different, one or more other operations may be added, and one or more operations may be omitted.

[0076] Fig. 6A is a flowchart of selecting a planar antenna according to temperature information, which is performed by an electronic device according to an exemplary embodiment of the present disclosure.

[0077] refer to Fig. 6A In operation 511-1, electronic device 120 may obtain temperature information of each of the plurality of planar antennas 310-1 to 310-N from temperature sensor 341. Temperature sensor 341 may repeatedly transmit temperature information to controller 330 at each predetermined period. The number of temperature sensors 341 may correspond to the number of planar antennas 310-1 to 310-N. That is, each of the plurality of planar antennas 310-1 to 310-N may be connected to a single temperature sensor 341.

[0078] The electronic device 120 may obtain temperature information of each of the plurality of planar antennas 310-1 to 310-N and compare the temperature information with a threshold temperature value. The threshold temperature value may correspond to a value preset at a manufacturing time point. The threshold temperature value may indicate a temperature value that is too high to cause component failure. For example, the threshold temperature value may be 90.

[0079] In operation 511-2, the electronic device 120 may select the panel antennas remaining after excluding the panel antennas whose temperatures exceed the threshold temperature value from the plurality of panel antennas 310-1 to 310-N. The electronic device 120 may compare the temperature information of each of the plurality of panel antennas 310-1 to 310-N with the threshold temperature value, and perform beamforming by excluding the panel antennas that may cause a malfunction. For example, it is assumed that the plurality of panel antennas 310-1 to 310-N include the first panel antenna 310-1 to the fourth panel antenna 310-4, and the temperature values ​​of the first panel antenna 310-1 to the fourth panel antenna 310-4 are 100, 70, 85, and 91, respectively. The electronic device 120 may exclude the first panel antenna 310-1 and the fourth panel antenna 310-4 whose temperatures exceed the threshold temperature value 90. The electronic device 120 may determine to perform beamforming based on the second panel antenna 310-2, the third panel antenna 310-3, and a combination thereof. Therefore, the electronic device 120 can prevent malfunction due to the high temperature of the planar antenna in advance and obtain a substantial cooling effect.

[0080] Figure 6B is a flowchart of selecting a flat panel antenna according to hand holding position information, which is executed by an electronic device according to an exemplary embodiment of the present disclosure.

[0081] refer to Figure 6B In operation 512-1, the electronic device 120 may obtain position information of the hand holding the electronic device 120 from the proximity sensor 342. The position information may include information about which part of the electronic device 120 the user has held. The number of proximity sensors 342 may correspond to the number of planar antennas 310-1 to 310-N. That is, each of the plurality of planar antennas 310-1 to 310-N may be connected to a single proximity sensor 342.

[0082] According to another example embodiment, the electronic device 120 may obtain the position information of the object covering (or blocking) the flat panel antenna from the proximity sensor 342. That is, the position information may correspond to an object different from the hand holding the electronic device. For example, the object may be a housing or a holder, such as a holder for attaching the electronic device 120 to a vehicle.

[0083] The electronic device 120 may obtain position information from the proximity sensor 342 connected to the plurality of planar antennas 310-1 to 310-N, and identify the planar antenna blocked by the user's hand. For example, when position information having a logic high or "1" value is received from the proximity sensor 342 corresponding to the first planar antenna 310-1, it may be recognized that the user is in contact with the first planar antenna 310-1 while currently holding the electronic device 120. As another example, when the position information received from the proximity sensor 342 corresponding to the second planar antenna 310-2 has a logic low or "0" value, it may be recognized that the user is holding the electronic device 120 but is not in contact with the second planar antenna 310-2.

[0084] In operation 512-2, based on the position information, the electronic device 120 may select at least one of the planar antennas remaining by excluding the planar antenna in contact with the hand holding the electronic device 120 from the plurality of planar antennas 310-1 to 310-N. The electronic device 120 may receive the position information of the hand holding the electronic device 120 from the proximity sensors 342 respectively connected to the plurality of planar antennas 310-1 to 310-N, and select at least one of the planar antennas identified as not in contact with the user's hand. For example, when the value of the position information received from the proximity sensor 342 connected to the first planar antenna 310-1 is "1" or logic high, if beamforming is performed by the first planar antenna 310-1, normal communication may not be performed because the formed beam is blocked by the user's hand. Therefore, the electronic device 120 may perform beamforming by using the planar antenna remaining by excluding the planar antenna in contact with the user's hand. Therefore, even without measuring the reception sensitivity of each of the plurality of panel antennas 310 - 1 to 310 -N, electronic device 120 may perform effective beamforming by pre-excluding a panel antenna that cannot form a beam by using proximity sensor data.

[0085] Figure 6C is a flowchart of selecting a flat panel antenna according to power information, which is performed by an electronic device according to an exemplary embodiment of the present disclosure.

[0086] refer to Figure 6C In operation 513 - 1 , the electronic device 120 may obtain information about power consumption of each of the plurality of planar antennas 310 - 1 through 310 -N. Figure 3A The controller 330 may further include a power monitoring circuit 333 , and the power monitoring circuit 333 may monitor a power value consumed by each of the plurality of flat panel antennas 310 - 1 to 310 -N.

[0087] The electronic device 120 may obtain the power value consumed by each of the plurality of planar antennas 310-1 to 310-N through the power monitoring circuit 333, and compare the obtained power value with the threshold power value. The threshold power value may be a preset value, or may vary according to the remaining battery capacity of the electronic device 120. For example, when the remaining battery capacity of the electronic device 120 is 30%, the electronic device 120 may change the threshold power value to improve battery usage efficiency.

[0088] In operation 513-2, electronic device 120 may select the remaining flat panel antennas by excluding the flat panel antennas whose power consumption values ​​exceed the threshold power value from the plurality of flat panel antennas 310-1 to 310-N. For example, when the plurality of flat panel antennas 310-1 to 310-N include the first flat panel antenna 310-1 to the fourth flat panel antenna 310-4 and the first flat panel antenna 310-1 and the second flat panel antenna 310-2 consume power exceeding the threshold power value, electronic device 120 may perform beamforming according to the third flat panel antenna 310-3, the fourth flat panel antenna 310-4, and a combination thereof by excluding the first flat panel antenna 310-1 to the second flat panel antenna 310-2. Therefore, electronic device 120 may perform beamforming by using the flat panel antennas with small power consumption, thereby improving battery usage efficiency.

[0089] Fig.6D is a flowchart of selecting a panel antenna based on a channel state, performed by an electronic device according to an exemplary embodiment of the present disclosure.

[0090] refer to Fig.6D In operation 514 - 1 , the electronic device 120 may obtain an RSRP value of each of the plurality of planar antennas 310 - 1 to 310 -N. Figure 3A The controller 330 may further include a channel state monitoring circuit 332, and the channel state monitoring circuit 332 may measure the RSRP value of each of the plurality of flat panel antennas 310-1 to 310-N. The RSRP value is used only as a representative value of the state of the receiving channel, but is not limited thereto. For example, the electronic device 120 may obtain all types of information that may indicate the channel state, such as a received signal strength indicator (RSSI) and a reference signal received quality (RSRQ) other than RSRP, and measure the channel quality based on the obtained information.

[0091] The electronic device 120 may obtain the RSRP value of each of the plurality of flat panel antennas 310-1 to 310-N through the channel state monitoring circuit 332, and compare the obtained RSRP value with the threshold RSRP value. The threshold RSRP value may be a preset value or a variable value. For example, when the communication type of the electronic device 120 is real-time communication (e.g., ultra reliable low latency communication (URLLC)) or communication requiring high quality of service (QoS), the electronic device 120 may increase the threshold RSRP value, thereby preventing the use of a flat panel antenna with low reception sensitivity or poor channel quality for communication in advance.

[0092] In operation 514-2, the electronic device 120 may select the remaining flat panel antennas by excluding the flat panel antennas having RSRP values ​​less than the threshold RSRP value from the plurality of flat panel antennas 310-1 to 310-N. For example, the plurality of flat panel antennas 310-1 to 310-N may include the first flat panel antenna 310-1 to the fourth flat panel antenna 310-4, and the RSRP values ​​of the second flat panel antenna 310-2 and the third flat panel antenna 310-3 may be less than the threshold RSRP value. The electronic device 120 may perform beamforming according to the first flat panel antenna 310-1, the fourth flat panel antenna 310-4, and a combination thereof by excluding the second flat panel antenna 310-2 and the third flat panel antenna 310-3. Therefore, the electronic device 120 may perform beamforming by using a flat panel antenna having good channel quality or high reception sensitivity. According to the above embodiment, although the flat panel antenna having an RSRP value less than the threshold RSRP value is excluded, the embodiment is not limited thereto. The electronic device 120 may set the threshold RSRP value and select the flat panel antenna having an RSRP value greater than the threshold RSRP value.

[0093] refer to FIG. 6A to FIG. 6D , although the electronic device 120 selects at least one flat antenna based on one piece of information in the environmental information, FIG. 6A to FIG. 6D The embodiments are not limited thereto. According to various embodiments of the present disclosure, the electronic device 120 may select a flat panel antenna based on at least two pieces of information in the environmental information. For example, the electronic device 120 may select at least one flat panel antenna by considering both temperature information and power consumption value.

[0094] Figure 7 is a flowchart of selecting an optimal codebook performed by an electronic device according to an exemplary embodiment of the present disclosure.

[0095] refer to Figure 7In operation 530-1, the electronic device 120 may generate a mutual coupling matrix between antenna elements of the determined flat antenna. Figure 8 As shown, the mutual coupling matrix can be generated by actual measurement or determined by modeling. The mutual coupling matrix can correspond to the following. Figure 8 , showing a first array antenna 311, a second array antenna 312, and a third array antenna 313. Mutual coupling between antenna elements may occur not only between adjacent antenna elements in the same array antenna (e.g., the second array antenna 312), but also between antenna elements in different array antennas (e.g., the first array antenna 311 and the third array antenna 313).

[0096] [Equation 1]

[0097] C=(Z A +Z L )(Z L I N +Z) -1

[0098] In equation 1, z A can be expressed as the antenna impedance, z L can represent the load impedance, and Z can represent the mutual impedance matrix (I N can represent the N-dimensional identity matrix).

[0099] For a dipole antenna array, each antenna element can be represented by z ij =R ij +jX ij The definitions and the reactive and resistive components can be expressed as follows.

[0100] [Equation 2]

[0101]

[0102] [Equation 3]

[0103]

[0104] In Equation 2 and Equation 3, μ 0 It can represent the magnetic constant, ε 0 Can represent the electrical constant, μ 0 =2πd ij , And 1 can represent the length of the dipole antenna, Furthermore, in Equation 2 and Equation 3, the cosine integral and sine integral functions are respectively as follows, and γ may represent the Euler-Mascheroni constant.

[0105] [Equation 4]

[0106]

[0107] [Equation 5]

[0108]

[0109] In operation 530-2, the electronic device 120 may generate an array response vector. The array response vector may be generated based on modeling. For example, assuming that the origin is the reference point of the phase response (ie, zero degrees), then in the polar coordinate system (d x , δ x ) in the azimuth The phase response of and elevation angle θ can be expressed as follows.

[0110] [Equation 6]

[0111]

[0112] Here, assuming that the i-th antenna is on the polar axis, the corresponding polar coordinates are (d i , 0), and its phase response is as follows.

[0113] [Equation 7]

[0114]

[0115] Furthermore, the phase responses of the remaining antenna elements are as follows.

[0116] [Equation 8]

[0117]

[0118] With azimuth and the elevation angle θ p The components of the corresponding array response vector are the phase response and the antenna's unique pattern characteristics The product of and can be expressed as follows.

[0119] [Equation 9]

[0120]

[0121] Therefore, the array response vector It can be expressed as follows.

[0122] [Equation 10]

[0123]

[0124] In operation 530-3, the electronic device 120 may determine the optimal beam pattern based on the control information. According to various embodiments of the present disclosure, the optimal beam pattern may be set according to the purpose of use. For example, the optimal beam pattern may be determined based on beam coverage, beam width, beam scanning timing, time interval length, the structure of the selected flat panel array, etc. Fig.10 A specific embodiment of determining an optimal beam pattern is described below.

[0125] In operation 530-4, the electronic device 120 may determine an analog / digital beam vector and perform optimization. For example, the beam shape in a direction (eg, φ in the horizontal direction and θ in the vertical direction) when a beam vector (or weight vector) of a given antenna array is as follows.

[0126] [Equation 11]

[0127]

[0128] Here, in order to achieve a desired beam pattern, the beam vector of the antenna array may be optimized to minimize the distortion of the beam pattern. For example, the electronic device 120 may perform the optimization by weighting the distortion of the beam pattern.

[0129] [Equation 12]

[0130]

[0131] here, The weight of the importance for the corresponding direction may be expressed. In addition, to reduce complexity, the beam pattern may be derived by performing evaluation only in the existing sampling directions.

[0132] [Equation 13]

[0133]

[0134] According to various embodiments of the present disclosure, when the beam vector b opt When the B is determined according to the beamforming structure, the electronic device 120 can identify the operation of the analog end and the digital end. The identification of the analog end and the digital end can be determined according to the connection relationship between the analog end and the digital end. Analog and b digital In the form of, the connection relationship between the analog end and the digital end can be derived by equation 14. The optimization is to minimize the distortion of the beam pattern. The distortion of the beam pattern can be weighted.

[0135] [Equation 14]

[0136]

[0137] Make B Analog∈F Analog And b digital ∈F Digital

[0138] Here, F Analog and F Digital is the set of implementable beamforming that satisfies the hardware constraints, and The weight can represent the importance of the corresponding direction.

[0139] [Equation 15]

[0140]

[0141] Make B Analog ∈F Analog And b digital ∈F Digital

[0142] [Equation 16]

[0143]

[0144] Make B Analog ∈F Analog And b digital ∈F Digital

[0145] According to various exemplary embodiments of the present disclosure, the electronic device 120 may reduce complexity by applying the above equation.

[0146] Fig.9A and Fig. 9B An example of analog / digital beamforming according to an example embodiment of the present disclosure is shown.

[0147] refer to Fig.9A , showing the flat panel antenna and array antenna included therein. The first array antenna 311, the second array antenna 312, and the third array antenna 313 can independently perform beamforming. For example, each of the signal from the first array antenna 311, the signal from the second array antenna 312, and the signal from the third array antenna 313 can be processed by a digital signal processor. Therefore, beamforming can be performed by weighting each array antenna differently.

[0148] refer to Fig. 9B , the first array antenna 311 to the third array antenna 313 can perform beamforming interdependently. For example, the signals from the first array antenna 311, the second array antenna 312, and the third array antenna 313 are added as a single signal before being processed by the digital signal processor, so different weights cannot be applied to each array antenna, but beams can be formed according to common beamforming weights.

[0149] Fig.10 is a flowchart of selecting an optimal beam pattern performed by an electronic device according to an exemplary embodiment of the present disclosure.

[0150] refer to Fig.10 In operation 530-3-1, the electronic device 120 may determine beam coverage. The beam coverage may indicate a direction having a specific range in which a beam is formed by the electronic device 120 by reflecting a position relative to the base station 110.

[0151] In operation 530-3-2, the electronic device 120 may determine the beam width. The electronic device 120 may determine the beam width by considering the mobility (i.e., the moving speed) of the electronic device 120. For example, when the electronic device 120 moves quickly, if communication is performed with a beam having a narrow beam width, beam scanning should be performed frequently. Therefore, when the electronic device 120 moves quickly, it may be determined that a beam having a wide beam width is generated.

[0152] In operation 530-3-3, the electronic device 120 may determine beam distribution and overlap / non-overlap based on the control information.

[0153] The control information is information received from a base station and may include information indicating beam scanning timing and interval length. Therefore, the electronic device 120 may receive the control information and determine the overlap for stably performing beam scanning with the determined beam coverage and beam width. For example, when the beam coverage area is wide and the beam width is wide, beamforming may be performed to overlap between adjacent beams, thereby directly or indirectly measuring the channel quality in all directions of the wide coverage. The electronic device 120 may determine the beam distribution based on the connection relationship of the selected flat panel antenna. For example, Fig.9A As shown, when the first array antenna 311 to the third array antenna 313 can be independently controlled, the beams can be arranged unevenly in the beam coverage. As another example, Fig. 9B As shown, when the first array antenna 311 to the third array antenna 313 are dependently controlled, the beams can be uniformly arranged within the beam coverage.

[0154] According to the above embodiment, it has been described that the electronic device 120 selects at least one flat panel antenna based on environmental information, and transmits information indicating the selected at least one flat panel antenna to the base station 110, but the embodiment is not limited thereto. According to various embodiments of the present disclosure, the base station 110 may indicate at least one flat panel antenna for uplink transmission. For example, the base station 110 may transmit transmission configuration indicator (TCI) information or information indicating the identification (ID) of the flat panel antenna of the electronic device 120 to the electronic device 120 during downlink transmission to determine at least one flat panel antenna of the electronic device 120.

[0155] According to an embodiment of the present disclosure, the base station 110 may transmit TCI information to the electronic device 120. The TCI information may be transmitted to the electronic device 120 through downlink control information (DCI). The TCI information may be information indicating an antenna port of the electronic device 120. The antenna port may not correspond to a physical flat panel antenna, but may indicate a flat panel antenna having the same or similar communication environment. Flat panel antennas having the same or similar communication environment may be quasi-co-located (QCL) with each other. The QCL relationship may indicate a relationship in which it may be assumed that the large-scale properties of a signal received from one antenna port of the electronic device 120 are at least partially the same as the large-scale properties of a signal received from another antenna port. For example, the large-scale properties may include Doppler spread and Doppler shift associated with frequency offset, average delay and delay spread associated with time offset, and the like. That is, the plurality of flat panel antennas 310-1 to 310-N of the electronic device 120 may be grouped into QCL flat panel antennas. For example, TCI0 ​​may indicate a first antenna group including a QCL panel antenna, and TCI1 may indicate a second antenna group including a QCL panel antenna having a channel characteristic different from that of the first antenna group. That is, the first antenna group and the second antenna group may be different groups in terms of properties such as Doppler spread, Doppler shift, average delay, delay spread, etc.

[0156] The electronic device 120 may receive TCI information from the base station 110 and identify the flat panel antenna group indicated by the received TCI information. For example, when the base station 110 transmits TCI0, the electronic device 120 may identify the first antenna group. Here, each antenna group indicated by the TCI information may be pre-mapped and stored. The electronic device 120 may select at least one flat panel antenna based on environmental information among the flat panel antennas included in the identified first antenna group. The selection of at least one flat panel antenna based on environmental information performed by the electronic device 120 is the same as described above, and its detailed description is omitted. That is, the base station 110 may transmit TCI information to the electronic device 120 to receive an uplink signal through the flat panel antenna corresponding to the channel characteristics selected by the base station 110.

[0157] As another example, the base station 110 may transmit the panel antenna ID information to the electronic device 120 to determine the panel antenna through which the uplink signal is to be transmitted. It may be assumed that the base station 110 has performed beam training or beam scanning by transmitting and receiving a reference signal before transmitting the panel antenna ID information through the downlink. That is, the base station 110 may obtain the ID information of each panel antenna of the electronic device 120 in advance through beam training with the electronic device 120. The base station 110 may determine the panel antenna for the uplink, and transmit the ID information indicating the determined panel antenna to the electronic device 120 via the DCI. The electronic device 120 may decode the received panel antenna ID information to identify the panel antenna that the base station 110 wants to use for the uplink, and transmit the uplink signal to the base station 110 through the identified panel antenna.

[0158] According to another exemplary embodiment of the present disclosure, in addition to TCI information or flat panel antenna ID information, the electronic device 120 may also determine at least one flat panel antenna based on environmental information. For example, when the electronic device 120 receives TCI information, the electronic device 120 may identify an antenna group by decoding the TCI information. The electronic device 120 may select at least one flat panel antenna from among the multiple flat panel antennas included in the identified antenna group by using environmental information. For example, the electronic device 120 may transmit and receive radio signals by using the remaining flat panel antennas by excluding at least one of the flat panel antennas whose temperature exceeds a threshold temperature, the flat panel antennas in contact with the user's hand, the flat panel antennas whose power consumption value exceeds a threshold power value, and the flat panel antennas having an RSRP value less than a threshold RSRP value from the flat panel antennas included in the first antenna group. When all the flat panel antennas included in the first antenna group are not suitable for transmission and reception (for example, when the temperatures of all the flat panel antennas included in the first antenna group exceed the threshold temperature), for reliable reception of the base station 110, the electronic device 120 may transmit an uplink signal by using the flat panel antenna whose temperature exceeds the threshold temperature, and also transmit a signal indicating that the flat panel antenna needs to be changed. Alternatively, in order to prevent malfunction of the electronic device 120, the electronic device 120 may bypass the selection of the first antenna group that has been instructed by the base station 110 and transmit uplink signals by using other panel antennas.

[0159] According to another exemplary embodiment, when the electronic device 120 receives the flat panel antenna ID information, the electronic device 120 may also determine whether the flat panel antenna indicated by the flat panel antenna ID information has a temperature exceeding a threshold temperature, has an RSRP value less than a threshold RSRP value, consumes power exceeding a threshold power value, and is in contact with the user's hand. Even if the temperature of the flat panel antenna selected by the base station 110 exceeds the threshold temperature, for reliable reception of the base station 110, the electronic device 120 may transmit an uplink signal through the flat panel antenna indicated by the flat panel antenna ID information, and also transmit a signal indicating that the flat panel antenna needs to be changed in the future. Alternatively, in order to prevent a malfunction of the electronic device 120, the electronic device 120 may transmit the uplink information through another flat panel antenna selected based on the environmental information instead of the flat panel antenna indicated by the received flat panel antenna ID information.

[0160] While the present disclosure has been particularly shown and described with reference to embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims.

Claims

1. An operating method of an electronic device, the electronic device having a plurality of planar antennas and storing information about a plurality of codebooks, the operating method comprising: Based on the environmental information, determining at least one flat panel antenna among the plurality of flat panel antennas; receiving control information from a base station; as well as selecting an optimal codebook among the plurality of codebooks based on the determined at least one planar antenna and the received control information, The selection of the optimal codebook includes: generating a mutual coupling matrix between antenna elements included in the determined at least one panel antenna; determining an array response vector of the at least one panel antenna based on the mutual coupling matrix, The environmental information includes at least one of first information about a temperature of each of the plurality of flat panel antennas, second information about power consumption of each of the plurality of flat panel antennas, third information indicating a channel state of each of the plurality of flat panel antennas, and fourth information indicating a flat panel antenna close to a hand of a user, The control information includes timing information about the time interval for transmitting a reference signal for beam scanning and beam configuration information.

2. The operating method according to claim 1, further comprising Beamforming is performed based on the selected optimal codebook.

3. The operating method according to claim 1, further comprising: Information indicative of the determined at least one panel antenna is transmitted to the base station.

4. The operating method according to claim 1, further comprising: comparing a temperature of each of the plurality of panel antennas to a threshold temperature, and The panel antennas remaining among the panel antennas after excluding the panel antenna having a temperature exceeding the threshold temperature from the plurality of panel antennas are selected as the determined at least one panel antenna.

5. The operating method according to claim 1, further comprising: comparing a power value consumed by each of the plurality of panel antennas to a threshold power value, and A panel antenna remaining among the panel antennas after excluding the panel antenna consuming power exceeding the threshold power value from the plurality of panel antennas is selected as the determined at least one panel antenna.

6. The operating method according to claim 1, further comprising: comparing a channel quality value for each of the plurality of panel antennas to a threshold quality value, and A panel antenna having a channel quality value exceeding the threshold quality value among the plurality of panel antennas is selected as the determined at least one panel antenna.

7. The operating method according to claim 6, wherein The third information indicating the channel state includes at least one of a reference signal received power (RSRP), a received signal strength indicator (RSSI), and a reference signal received quality (RSRQ).

8. The operating method according to claim 1, further comprising: identifying one or more flat panel antennas in physical contact with a hand of a user based on the fourth information, and A panel antenna among the plurality of panel antennas remaining after excluding the identified one or more panel antennas in physical contact with a hand of a user from the plurality of panel antennas is selected as the determined at least one panel antenna.

9. The operating method according to claim 1, wherein: The selection of the optimal codebook further includes: determining an optimal beam pattern based on the control information received from the base station; and Determine analog / digital beam vectors and perform optimization.

10. The operating method according to claim 9, wherein: The determining of the optimal beam pattern includes: Determine beam coverage; determining beam width; and Beam distribution and overlap are determined based on the control information.

11. An electronic device, comprising: a communications interface comprising a plurality of planar antennas; a storage device storing information about a plurality of codebooks; as well as a controller configured to determine at least one flat panel antenna among the plurality of flat panel antennas based on environmental information, receiving control information from a base station by using the communication interface, and selecting an optimal codebook among the plurality of codebooks based on the determined at least one planar antenna and the received control information, The optimal codebook is selected by the controller, the controller generates a mutual coupling matrix between antenna elements included in the determined at least one flat panel antenna; and an array response vector of the determined at least one flat panel antenna is determined based on the mutual coupling matrix. The environmental information includes at least one of first information about a temperature of each of the plurality of flat panel antennas, second information about power consumption of each of the plurality of flat panel antennas, third information indicating a channel state of each of the plurality of flat panel antennas, and fourth information indicating a flat panel antenna close to a hand of a user, The control information includes information about the timing and time interval of transmitting reference signals for beam scanning and beam configuration information.

12. The electronic device according to claim 11, wherein The controller is further configured to perform beamforming based on the selected optimal codebook.

13. The electronic device according to claim 11, wherein The controller is further configured to transmit information indicating the determined at least one panel antenna to the base station by using the communication interface.

14. The electronic device according to claim 11, further comprising one or more sensors, in, measuring information about temperature by using a temperature sensor among the one or more sensors, and Wherein, the controller is further configured as: comparing a temperature of each of the plurality of panel antennas to a threshold temperature, and The at least one panel antenna among the panel antennas remaining by excluding panel antennas having a temperature exceeding the threshold temperature from the plurality of panel antennas is determined.

15. The electronic device according to claim 11, wherein The controller further includes a power monitoring circuit configured to monitor a power value consumed by each of the plurality of flat panel antennas, and in, The controller is also configured to: Based on the information about the power consumption of each of the plurality of flat panel antennas, a power value consumed by each of the plurality of flat panel antennas is compared with a threshold power value, and at least one flat panel antenna is determined among the remaining flat panel antennas by excluding flat panel antennas consuming power exceeding the threshold power value from the plurality of flat panel antennas.

16. The electronic device according to claim 11, wherein The controller is also configured to: comparing a channel quality value of each of the plurality of panel antennas to a threshold quality value based on information indicative of the channel state of each of the plurality of panel antennas, and The at least one of the panel antennas among the plurality of panel antennas having a channel quality value exceeding the threshold quality value is determined.

17. The electronic device according to claim 16, wherein The third information indicating the channel state is measured by a channel state monitoring circuit included in the controller, and in, The third information includes at least one of a reference signal received power (RSRP), a received signal strength indicator (RSSI), and a reference signal received quality (RSRQ).

18. The electronic device of claim 11, further comprising one or more sensors, in, The controller is also configured to: identifying one or more panel antennas in physical contact with a user's hand based on the fourth information received from the one or more sensors, and The at least one panel antenna among the panel antennas remaining after excluding the identified panel antenna from the plurality of panel antennas is selected.

19. The electronic device according to claim 11, wherein The controller that selects the optimal codebook determines an optimal beam pattern based on the control information received from the base station, determines an analog / digital beam vector, and performs optimization.

20. The electronic device according to claim 19, wherein The optimal beam pattern is selected by the controller determining beam coverage, determining beam width, and determining beam distribution and overlap based on the control information.

21. A wireless communication system, comprising: a base station configured to transmit control information to the electronic device; as well as The electronic device is configured to: Based on the environmental information, determining at least one flat panel antenna among a plurality of flat panel antennas, selecting an optimal codebook among a plurality of codebooks based on the determined at least one planar antenna and the control information, and performing beamforming based on the selected optimal codebook, The environmental information includes at least one of temperature information, power consumption information and channel state information of each of the plurality of planar antennas, and The control information includes timing information about a time interval for transmitting a reference signal for beam scanning and beam-related configuration information, The selection of the optimal codebook includes: A mutual coupling matrix between antenna elements included in the determined at least one flat panel antenna is generated; and an array response vector of the determined at least one flat panel antenna is determined based on the mutual coupling matrix.

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