WO2020149434A1 - Electronic device for performing interference avoidance - Google Patents

Abstract

An electronic device according to the present invention comprises: a transmission and reception circuit including a first frequency converter of a first communication system, a second frequency converter of a second communication system, and an oscillator; and a baseband processor for controlling the transmission and reception circuit such that a signal of a second frequency which is obtained by shifting and multiplying a first frequency of the oscillator is input to the second frequency converter. Meanwhile, when connected to both the first communication system and the second communication system, the baseband processor changes a shift value of the first frequency in the transmission and reception circuit in order to reduce interference between an RF frequency band of the first communication system and an IF frequency band of the second communication system, and changes a shift value of a frequency shifter in order to reduce the interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system, such that avoidance of interference between a plurality of wireless interfaces is possible.

Description

Electronic devices that perform interference avoidance

The present invention relates to an electronic device that performs interference avoidance. More specifically, it relates to an electronic device that performs interference avoidance between a plurality of air interfaces.

Electronic devices may be divided into mobile/portable terminals and stationary terminals depending on whether they are movable. Again, electronic devices may be divided into handheld terminals and vehicle mounted terminals according to whether the user can directly carry them.

The functions of electronic devices are diversifying. For example, there are functions for data and voice communication, photo and video shooting through a camera, voice recording, music file playback through a speaker system, and output of an image or video to the display. In some terminals, an electronic game play function is added or a multimedia player function is performed. In particular, recent mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

As such electronic devices have diversified functions, for example, they are implemented in the form of a multimedia player equipped with complex functions such as taking pictures or videos, playing music or video files, and receiving games and broadcasts. have.

In order to support and increase the functions of such electronic devices, it may be considered to improve the structural part and/or software part of the terminal.

In addition to the above attempts, in recent years, a wireless communication system using LTE communication technology has been commercialized to provide various services. In addition, it is expected that wireless communication systems using 5G communication technology will be commercialized in the future to provide various services. Meanwhile, some of the LTE frequency bands may be allocated to provide 5G communication service.

In this regard, the mobile terminal may be configured to provide 5G communication service in various frequency bands. Recently, attempts have been made to provide a 5G communication service using a Sub6 band below the 6GHz band. However, in the future, it is expected to provide 5G communication service using millimeter wave (mmWave) band in addition to Sub6 band for faster data rate.

Meanwhile, a 5G Sub6 module and a 5G millimeter wave module may be disposed in one electronic device. At this time, since the 4G LTE module and the 5G Sub6 module do not perform beamforming in the terminal (electronic device), they can be implemented as one module. On the other hand, a communication system using a 5G millimeter wave band has a high frequency band and requires beamforming through an array antenna in order to maintain a certain coverage.

At this time, interference may occur between the RF signal of the 5G Sub6 module and the IF signal of the 5G millimeter wave module. Accordingly, there is a problem that interference between a plurality of wireless interfaces or a plurality of communication systems may increase.

In particular, when the 5G Sub6 RFIC and the 5G millimeter wave band RFIC are disposed in an electronic device as one module, interference between a plurality of air interfaces or a plurality of communication systems may be further increased.

The present invention aims to solve the above and other problems. In addition, another object is to provide an electronic device that performs interference avoidance between a plurality of air interfaces.

Another object of the present invention is to provide an electronic device capable of avoiding interference between an RF signal of a 5G Sub6 module and an IF signal of a 5G millimeter wave module.

In order to achieve the above or other object, an electronic device according to the present invention includes: a transceiver circuit including a first frequency converter of a first communication system, a second frequency converter of a second communication system, and an oscillator; And a baseband processor that controls the transceiver circuit so that a signal of a second frequency shifted and multiplyed to the first frequency of the oscillator is input to the second frequency converter. Meanwhile, the first frequency converter performs conversion between the first frequency and the RF frequency band, the second frequency converter performs conversion between the second frequency and the IF frequency band, and the baseband processor performs the first And when both are connected to the second communication system, by changing the transition value of the first frequency in the transceiver circuit to reduce interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system. , By changing the transition value of the frequency shifter so that interference is reduced between the RF frequency band of the first communication system and the IF frequency band of the second communication system, it is possible to avoid interference between a plurality of radio interfaces.

In one embodiment, the first communication system is a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system may be a 5G communication system operating in the millimeter wave frequency band.

In one embodiment, the first antenna operating in the 5G Sub6/4G frequency band; And a second antenna operating in the millimeter wave frequency band.

In one embodiment, the baseband processor, the harmonic signal of the first transmission signal transmitted through the first antenna is the second IF transmission signal and the second IF reception signal of the IF frequency band of the 5G communication system The transition value of the first frequency may be changed to reduce the interference of. Accordingly, there is an advantage in that the harmonic signal of the RF signal of the first communication system can reduce the level of interference to the IF signal of the second communication system.

In one embodiment, if the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band are in a standalone arrangement, the baseband processor may perform the following radiation pattern adjustment. . In the baseband processor, in a direction of the first transmission signal and the first reception signal, nulls of a radiation pattern through the second antenna are formed to form the first and second communication systems. In order to reduce inter-cell interference, the phase of each element of the second antenna may be controlled through an RF transceiver circuit.

In one embodiment, it may further include an RF transceiver circuit that is connected to the transceiver circuit and transmits and receives an RF signal of the second communication system. In addition, the RF transceiver circuit may include an IF/RF converter that converts the IF signal of the second communication system into an RF signal.

In one embodiment, the baseband processor, based on the shifted first frequency value, the IF/RF so that the RF frequency of the RF signal of the second communication system is output equal to the RF frequency before the transition value The oscillation frequency of the converter can be controlled.

In one embodiment, the transceiver circuit may include a frequency shifter connected to the first frequency converter. In addition, a frequency multiplier connected to the frequency shifter may be further included. At this time, a second frequency signal in which the first frequency value shifted through the frequency shifter is multiplied through the frequency multiplier may be input to the second frequency converter.

In one embodiment, the first frequency converter may include a first down converter connected to a receive amplifier and a first up converter connected to a power amplifier. Meanwhile, the IF/RF converter includes a second down converter connected to a second receive amplifier operating in the second communication system and a second up converter connected to a second power amplifier operating in the second communication system. Can be.

In an embodiment, the second down converter and the second up converter may be connected to a plurality of second receive amplifiers and a plurality of second power amplifiers through a power divider and a power combiner.

In one embodiment, the baseband processor, if the first transmission signal of the first communication system is greater than or equal to a threshold, before receiving the second reception signal through the second communication system, the transceiver circuit The transition value of the first frequency can be changed.

In one embodiment, if the difference between the harmonic frequency of the first frequency and the second frequency is equal to or less than a second threshold, the baseband processor may receive a second received signal through the second communication system. The transmission/reception circuit may change a transition value of the first frequency.

An electronic device according to another aspect of the present invention includes: a transceiver circuit including a first frequency converter of a first communication system, a second frequency converter of a second communication system, and an oscillator; An RF transceiver circuit connected to the transceiver circuit and transmitting and receiving an RF signal of the second communication system; And a control unit controlling the transceiver circuit so that a signal of a second frequency shifted and multiplyed to the first frequency of the oscillator is input to the second frequency converter. Meanwhile, the control unit may change the transition value of the first frequency in the transceiver circuit to reduce interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system. Accordingly, it is possible to avoid interference between a plurality of radio interfaces by changing the shift value of the frequency shifter so that interference is reduced between the RF frequency band of the first communication system and the IF frequency band of the second communication system.

According to at least one embodiment of the present invention, by changing the transition value of the frequency shifter to reduce interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system, interference avoidance between a plurality of radio interfaces is avoided. It is possible.

Further, according to at least one embodiment of the present invention, it is possible to provide an electronic device capable of reducing the level of interference of an RF signal of a first communication system to an IF signal of a second communication system.

1A is a block diagram illustrating an electronic device related to the present invention, and FIGS. 1B and 1C are conceptual views illustrating an example of an electronic device related to the present invention in different directions.

2 shows a configuration of a wireless communication unit of an electronic device operable in a plurality of wireless communication systems according to the present invention.

3A shows a detailed configuration of 5G RFFE and RFIC/IFIC according to an embodiment of the present invention.

Figure 3b shows a detailed configuration of 5G RFFE and RFIC + IFIC integrated structure according to another embodiment of the present invention.

4 shows a detailed configuration of an electronic device that provides a plurality of wireless interfaces according to the present invention.

5A shows a detailed configuration for avoiding interference into an mmWave IF band according to reception of a Sub6 band signal according to an embodiment of the present invention.

5B illustrates the operation of each component of interference avoidance due to reception of a Sub6 band signal as shown in FIG. 5A.

6A shows a detailed configuration for avoiding interference into an mmWave IF band according to transmission of a Sub6 band signal according to another embodiment of the present invention.

6B shows the operation of each component of interference avoidance due to transmission of a Sub6 band signal as shown in FIG. 6A.

7 is a conceptual diagram of a beam pattern adjustment method for avoiding inter-cell interference in a structure in which a plurality of base stations according to the present invention are arranged.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numbers regardless of the reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "modules" and "parts" for components used in the following description are given or mixed only considering the ease of writing the specification, and do not have meanings or roles distinguished from each other in themselves. In addition, in the description of the embodiments disclosed herein, when it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed herein, detailed descriptions thereof are omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed in the specification is not limited by the accompanying drawings, and all modifications included in the spirit and technical scope of the present invention , It should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as “comprises” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Electronic devices described herein include mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation, and slate PCs. , Tablet PC (tablet PC), ultrabook (ultrabook), wearable device (wearable device, for example, a watch-type terminal (smartwatch), glass-type terminal (smart glass), HMD (head mounted display), etc. may be included have.

However, the configuration according to the embodiment described in the present specification can be easily recognized by those skilled in the art that the configuration may be applied to a fixed terminal such as a digital TV, a desktop computer, and a digital signage, except when applicable only to a mobile terminal. will be.

1A to 1C, FIG. 1A is a block diagram illustrating an electronic device related to the present invention, and FIGS. 1B and 1C are conceptual views of an electronic device related to the present invention as viewed from different directions.

The electronic device 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190 ) And the like. The components shown in FIG. 1A are not essential for implementing an electronic device, and thus, the electronic device described herein may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 among the components, between the electronic device 100 and the wireless communication system, between the electronic device 100 and another electronic device 100, or the electronic device 100 and an external server It may include one or more modules that enable wireless communication between. Also, the wireless communication unit 110 may include one or more modules connecting the electronic device 100 to one or more networks. Here, the one or more networks may be, for example, a 4G communication network and a 5G communication network.

The wireless communication unit 110 may include at least one of a 4G wireless communication module 111, a 5G wireless communication module 112, a short-range communication module 113, and a location information module 114.

The 4G wireless communication module 111 may transmit and receive 4G base stations and 4G signals through a 4G mobile communication network. At this time, the 4G wireless communication module 111 may transmit one or more 4G transmission signals to a 4G base station. Also, the 4G wireless communication module 111 may receive one or more 4G reception signals from a 4G base station.

In this regard, uplink (UL) multi-input multi-output (MIMO) may be performed by a plurality of 4G transmission signals transmitted to a 4G base station. In addition, downlink (DL) multi-input multi-output (MIMO) may be performed by a plurality of 4G received signals received from a 4G base station.

The 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network. Here, the 4G base station and the 5G base station may have a non-stand-alone (NSA) structure. For example, the 4G base station and the 5G base station may be a co-located structure disposed at the same location in the cell. Alternatively, the 5G base station may be arranged in a stand-alone (SA) structure at a location separate from the 4G base station.

The 5G wireless communication module 112 may transmit and receive 5G base stations and 5G signals through a 5G mobile communication network. At this time, the 5G wireless communication module 112 may transmit one or more 5G transmission signals to a 5G base station. Also, the 5G wireless communication module 112 may receive one or more 5G reception signals from a 5G base station.

At this time, the 5G frequency band may use the same band as the 4G frequency band, which may be referred to as LTE re-farming. Meanwhile, as a 5G frequency band, a Sub6 band, which is a band of 6 GHz or less, may be used.

On the other hand, the millimeter wave (mmWave) band may be used as a 5G frequency band to perform broadband high-speed communication. When the millimeter wave (mmWave) band is used, the electronic device 100 may perform beam forming for communication coverage expansion with the base station.

Meanwhile, regardless of the 5G frequency band, a 5G communication system may support a larger number of multi-input multi-output (MIMO) to improve transmission speed. In this regard, uplink (UL) MIMO may be performed by a plurality of 5G transmission signals transmitted to a 5G base station. In addition, downlink (DL) MIMO may be performed by a plurality of 5G reception signals received from a 5G base station.

Meanwhile, the wireless communication unit 110 may be in a dual connectivity (DC) state with a 4G base station and a 5G base station through the 4G wireless communication module 111 and the 5G wireless communication module 112. As such, a dual connection between a 4G base station and a 5G base station may be referred to as EN-DC (EUTRAN NR DC). Here, EUTRAN is an Evolved Universal Telecommunication Radio Access Network, which means a 4G wireless communication system, and NR is New Radio, which means a 5G wireless communication system.

Meanwhile, if the 4G base station and the 5G base station have a co-located structure, throughput can be improved through inter-CA (carrier aggregation). Therefore, the 4G base station and the 5G base station can be In the EN-DC state, the 4G reception signal and the 5G reception signal can be simultaneously received through the 4G wireless communication module 111 and the 5G wireless communication module 112.

The short-range communication module 113 is for short-range communication, Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, NFC (Near Field Communication), by using at least one of Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) technology, it can support short-range communication. The short-range communication module 114 may be provided between the electronic device 100 and a wireless communication system, between the electronic device 100 and other electronic devices 100, or through the electronic device 100 through wireless area networks. ) And other electronic devices 100 or a network in which an external server is located may support wireless communication. The short-range wireless communication network may be wireless personal area networks (Wireless Personal Area Networks).

Meanwhile, short-range communication between electronic devices may be performed using the 4G wireless communication module 111 and the 5G wireless communication module 112. In an embodiment, short-range communication may be performed by a device-to-device (D2D) method between electronic devices without going through a base station.

Meanwhile, for improving transmission speed and convergence of a communication system, carrier aggregation (CA) is performed using at least one of the 4G wireless communication module 111 and the 5G wireless communication module 112 and the Wi-Fi communication module 113. This can be done. In this regard, 4G + WiFi carrier aggregation (CA) may be performed using the 4G wireless communication module 111 and the Wi-Fi communication module 113. Alternatively, 5G + WiFi carrier aggregation (CA) may be performed using the 5G wireless communication module 112 and the Wi-Fi communication module 113.

The location information module 114 is a module for acquiring a location (or current location) of an electronic device, and representative examples thereof include a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, if the electronic device utilizes a GPS module, the position of the electronic device may be acquired using a signal transmitted from a GPS satellite. As another example, when the Wi-Fi module is used as an electronic device, the location of the electronic device may be acquired based on information of a Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal. If necessary, the location information module 115 may perform any function of other modules of the wireless communication unit 110 in order to obtain data regarding the location of the electronic device by substitution or additionally. The location information module 115 is a module used to obtain a location (or current location) of the electronic device, and is not limited to a module that directly calculates or acquires the location of the electronic device.

Specifically, when the electronic device utilizes the 5G wireless communication module 112, the location of the electronic device may be obtained based on the information of the 5G wireless communication module and the 5G base station that transmits or receives the wireless signal. In particular, the 5G base station in the millimeter wave (mmWave) band is deployed in a small cell having a small coverage, so it is advantageous to acquire the location of the electronic device.

The input unit 120 may include a camera 121 for inputting a video signal or a video input unit, a microphone for inputting an audio signal (microphone 122), or an audio input unit, a user input unit 123 for receiving information from a user, for example , A touch key, a mechanical key, and the like. The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the electronic device, surrounding environment information surrounding the electronic device, and user information. For example, the sensing unit 140 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity G-sensor, gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor), fingerprint scan sensor, ultrasonic sensor , Optical sensor (e.g., camera (see 121)), microphone (see 122, battery), battery gauge, environmental sensor (e.g. barometer, hygrometer, thermometer, radioactivity sensor, Thermal sensor, gas sensor, etc.), and a chemical sensor (eg, an electronic nose, a health care sensor, a biometric sensor, etc.). Meanwhile, the electronic device disclosed in this specification may combine and use information sensed by at least two or more of these sensors.

The output unit 150 is for generating output related to vision, hearing, or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and an optical output unit 154 can do. The display unit 151 may form a mutual layer structure with the touch sensor or may be integrally formed, thereby realizing a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the electronic device 100 and a user, and at the same time, provide an output interface between the electronic device 100 and the user.

The interface unit 160 serves as a passage with various types of external devices connected to the electronic device 100. The interface unit 160 connects a device equipped with a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and an identification module. It may include at least one of a port, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port. In the electronic device 100, in response to an external device being connected to the interface unit 160, appropriate control related to the connected external device may be performed.

Also, the memory 170 stores data supporting various functions of the electronic device 100. The memory 170 may store a number of application programs (application programs) driven by the electronic device 100, data for operating the electronic device 100, and instructions. At least some of these applications can be downloaded from external servers via wireless communication. In addition, at least some of these application programs may exist on the electronic device 100 from the time of shipment for basic functions of the electronic device 100 (for example, an incoming call, a calling function, a message reception, and a calling function). Meanwhile, the application program may be stored in the memory 170 and installed on the electronic device 100 to be driven by the controller 180 to perform an operation (or function) of the electronic device.

The controller 180 controls the overall operation of the electronic device 100 in addition to the operations related to the application program. The controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170.

In addition, the controller 180 may control at least some of the components described with reference to FIG. 1A in order to drive the application program stored in the memory 170. Furthermore, the controller 180 may operate by combining at least two or more of the components included in the electronic device 100 to drive the application program.

Under the control of the controller 180, the power supply unit 190 receives external power and internal power to supply power to each component included in the electronic device 100. The power supply unit 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of an electronic device according to various embodiments described below. Further, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory 170.

1B and 1C, the disclosed electronic device 100 includes a terminal body in the form of a bar. However, the present invention is not limited to this, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type to which two or more bodies are movably coupled. . Although related to a specific type of electronic device, the description of a specific type of electronic device may be generally applied to other types of electronic devices.

Here, the terminal body may be understood as a concept referring to the electronic device 100 as at least one aggregate.

The electronic device 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. As illustrated, the electronic device 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on the front of the terminal body to output information. As illustrated, the window 151a of the display unit 151 is mounted on the front case 101 to form the front surface of the terminal body together with the front case 101.

In some cases, electronic components may also be mounted on the rear case 102. Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, and a memory card. In this case, a rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside. Meanwhile, some of the side surfaces of the rear case 102 may be implemented to operate as a radiator.

As shown, when the rear cover 103 is coupled to the rear case 102, a part of the side surface of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, an opening for exposing the camera 121b or the sound output unit 152b to the outside may be provided in the rear cover 103.

The electronic device 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, the first and second units Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, and an interface unit 160 may be provided.

The display unit 151 displays (outputs) information processed by the electronic device 100. For example, the display unit 151 may display execution screen information of an application program driven by the electronic device 100, or UI (User Interface) or GUI (Graphic User Interface) information according to the execution screen information. .

Also, two or more display units 151 may be present depending on the implementation form of the electronic device 100. In this case, the electronic devices 100 may have a plurality of display units spaced apart or integrally disposed on one surface, or may be disposed on different surfaces.

The display unit 151 may include a touch sensor that senses a touch on the display unit 151 so that a control command can be input by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 can be configured to generate a control command corresponding to the touch based on the touch. The content input by the touch method may be a letter or a number, or an instruction or designable menu item in various modes.

As such, the display unit 151 may form a touch screen together with a touch sensor, and in this case, the touch screen may function as a user input unit 123 (see FIG. 1A ). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.

The first sound output unit 152a may be implemented as a receiver that delivers a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia playback sounds. ).

The light output unit 154 is configured to output light to notify when an event occurs. Examples of the event include message reception, call signal reception, missed calls, alarm, schedule notification, email reception, information reception through an application, and the like. The control unit 180 may control the light output unit 154 so that the output of light is terminated when the user's event confirmation is detected.

The first camera 121a processes an image frame of a still image or video obtained by an image sensor in a shooting mode or a video call mode. The processed image frame may be displayed on the display unit 151, and may be stored in the memory 170.

The first and second operation units 123a and 123b are examples of the user input unit 123 operated to receive a command for controlling the operation of the electronic device 100, and may also be collectively referred to as a manipulating portion. have. The first and second manipulation units 123a and 123b may be employed in any manner as long as the user operates the device while receiving a tactile feeling, such as touch, push, scroll. Also, the first and second manipulation units 123a and 123b may be employed in such a way that the user operates without a tactile feeling through a proximity touch, a hovering touch, or the like.

Meanwhile, the electronic device 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive a user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.

The interface unit 160 is a passage through which the electronic device 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with other devices (eg, earphones, external speakers), a port for short-range communication (eg, an infrared port (IrDA Port), a Bluetooth port (Bluetooth) Port, Wireless LAN Port, etc.], or at least one of a power supply terminal for supplying power to the electronic device 100. The interface unit 160 may be implemented in the form of a socket that accommodates an external card such as a subscriber identification module (SIM) or a user identity module (UIM) or a memory card for storing information.

A second camera 121b may be disposed on the rear side of the terminal body. In this case, the second camera 121b has a shooting direction substantially opposite to the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix format. Such a camera may be referred to as an array camera. When the second camera 121b is configured as an array camera, images may be captured in a variety of ways using a plurality of lenses, and better quality images may be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. When the flash 124 photographs the subject with the second camera 121b, light is directed toward the subject.

A second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, or may be used to implement a speakerphone mode during a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be built in the terminal body or may be formed in the case. Meanwhile, a plurality of antennas connected to the 4G wireless communication module 111 and the 5G wireless communication module 112 may be disposed on the side of the terminal. Alternatively, the antenna may be formed of a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

On the other hand, a plurality of antennas disposed on the side of the terminal may be implemented in four or more to support MIMO. In addition, when the 5G wireless communication module 112 operates in a millimeter wave (mmWave) band, as each of the plurality of antennas is implemented as an array antenna, a plurality of array antennas may be disposed in the electronic device.

The terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the electronic device 100. The power supply unit 190 may include a battery 191 built in the terminal body or configured to be detachable from the outside of the terminal body.

Hereinafter, embodiments of a multi-transmission system structure according to the present invention and an electronic device having the same, in particular, a power amplifier and an electronic device having the same in a heterogeneous radio system will be described with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention.

2 shows a configuration of a wireless communication unit of an electronic device operable in a plurality of wireless communication systems according to the present invention. Referring to FIG. 2, the electronic device includes a first power amplifier 210, a second power amplifier 220 and an RFIC 250. Also, the electronic device may further include a modem (Modem 400) and an application processor (AP). Here, the modem (Modem, 400) and the application processor (AP, 500) is physically implemented in one chip, it may be implemented in a logical and functionally separated form. However, the present invention is not limited thereto, and may be implemented in the form of physically separated chips depending on the application.

Meanwhile, the RFIC 250 and the modem 400 may be referred to as a transceiver circuit (250) and a baseband processor (400), respectively.

Meanwhile, the electronic device includes a plurality of low noise amplifiers (LNAs) 410 to 440 at the receiver. Here, the first power amplifier 210, the second power amplifier 220, the control unit 250 and the plurality of low noise amplifiers 310 to 340 are all operable in the first communication system and the second communication system. In this case, the first communication system and the second communication system may be 4G communication systems and 5G communication systems, respectively.

2, the RFIC 250 may be configured as a 4G/5G integrated type, but is not limited thereto, and may be configured as a 4G/5G separated type according to an application. When the RFIC 250 is configured as a 4G/5G integrated type, it is advantageous in terms of synchronization between 4G/5G circuits, and has an advantage that control signaling by the modem 400 can be simplified.

Meanwhile, when the RFIC 250 is configured as a 4G/5G separated type, it may be referred to as a 4G RFIC and a 5G RFIC, respectively. In particular, when the band difference between the 5G band and the 4G band is large, such as when the 5G band is configured as a millimeter wave band, the RFIC 250 may be configured as a 4G/5G separated type. As described above, when the RFIC 250 is configured as a 4G/5G separated type, there is an advantage that the RF characteristics can be optimized for each of the 4G band and the 5G band.

Meanwhile, even when the RFIC 250 is configured as a 4G/5G separated type, it is possible that the 4G RFIC and the 5G RFIC are logically and functionally separated and physically implemented in one chip.

On the other hand, the application processor (AP, 500) is configured to control the operation of each component of the electronic device. Specifically, the application processor (AP, 500) may control the operation of each component of the electronic device through the modem 400.

For example, the modem 400 may be controlled through a power management IC (PMIC) for low power operation of an electronic device. Accordingly, the modem 400 may operate the power circuits of the transmitter and receiver through the RFIC 250 in a low power mode.

In this regard, when it is determined that the electronic device is in the idle mode, the application processors AP and 500 may control the RFIC 250 through the modem 300 as follows. For example, if the electronic device is in the idle mode, at least one of the first and second power amplifiers 110 and 120 operates in the low power mode or is turned off (RFIC) through the modem 300 250 can be controlled.

According to another embodiment, when the electronic device is in a low battery mode, the application processor AP, 500 may control the modem 300 to provide wireless communication capable of low-power communication. For example, when the electronic device is connected to a plurality of entities among a 4G base station, a 5G base station, and an access point, the application processor AP 500 may control the modem 400 to enable wireless communication at the lowest power. Accordingly, even if the throughput is slightly sacrificed, the application processors AP and 500 may control the modem 400 and the RFIC 250 to perform short-range communication using only the short-range communication module 113.

According to another embodiment, if the remaining battery power of the electronic device is greater than or equal to a threshold, the modem 300 may be controlled to select an optimal air interface. For example, the application processor (AP, 500) may control the modem 400 to receive through both the 4G base station and the 5G base station according to the remaining battery power and available radio resource information. At this time, the application processor (AP, 500) may receive the remaining battery information from the PMIC, the available radio resource information from the modem 400. Accordingly, if the remaining battery power and available radio resources are sufficient, the application processors AP and 500 may control the modem 400 and the RFIC 250 to receive through both the 4G base station and the 5G base station.

Meanwhile, the multi-transceiving system of FIG. 2 may integrate a transmitter and a receiver of each radio system into one transceiver. Accordingly, there is an advantage in that the circuit part that integrates the two types of system signals can be eliminated at the RF front-end.

In addition, since the front end components can be controlled by an integrated transmission/reception unit, it is possible to integrate the front end components more efficiently when the transmission/reception systems are separated for each communication system.

In addition, when it is separated for each communication system, it is impossible to control other communication systems as necessary, or it is impossible to efficiently allocate resources because the system delay is increased. On the other hand, the multi-transmission/reception system as shown in FIG. 2 can control other communication systems as necessary, and has the advantage of efficient resource allocation because it can minimize system delay.

Meanwhile, the first power amplifier 210 and the second power amplifier 220 may operate in at least one of the first and second communication systems. In this regard, when the 5G communication system operates in the 4G band or the Sub6 band, the first and second power amplifiers 220 are operable in both the first and second communication systems.

On the other hand, when the 5G communication system operates in the millimeter wave (mmWave) band, the first and second power amplifiers 210 and 220 may operate in the 4G band, and the other in the millimeter wave band. have.

Meanwhile, two different wireless communication systems can be implemented with one antenna by combining the transmitting and receiving unit and the transmitting and receiving antenna. At this time, 4x4 MIMO can be implemented using 4 antennas as shown in FIG. 2. At this time, 4x4 DL MIMO may be performed through downlink (DL).

Meanwhile, if the 5G band is a Sub6 band, the first to fourth antennas ANT1 to ANT4 may be configured to operate in both the 4G band and the 5G band. On the other hand, if the 5G band is a millimeter wave (mmWave) band, the first to fourth antennas ANT1 to ANT4 may be configured to operate in any one of the 4G band and the 5G band. At this time, if the 5G band is a millimeter wave (mmWave) band, each of a plurality of separate antennas may be configured as an array antenna in the millimeter wave band.

Meanwhile, 2x2 MIMO may be implemented using two antennas connected to the first power amplifier 210 and the second power amplifier 220 among the four antennas. At this time, 2x2 UL MIMO (2 Tx) may be performed through UL. Or, it is not limited to 2x2 UL MIMO, and can be implemented in 1 Tx or 4 Tx. At this time, when the 5G communication system is implemented with 1 Tx, only one of the first and second power amplifiers 210 and 220 needs to operate in the 5G band. Meanwhile, when the 5G communication system is implemented with 4Tx, an additional power amplifier operating in the 5G band may be further provided. Alternatively, a transmission signal may be branched from each of one or two transmission paths, and the branched transmission signal may be connected to a plurality of antennas.

Meanwhile, a switch-type splitter or a power divider is built in the RFIC corresponding to the RFIC 250, so there is no need for a separate component to be placed outside, thereby improving component mountability. Can. Specifically, a transmitter (TX) of two different communication systems can be selected by using a single pole double throw (SPDT) switch inside the RFIC corresponding to the controller 250.

Also, an electronic device operable in a plurality of wireless communication systems according to the present invention may further include a duplexer 231, a filter 232, and a switch 233.

The duplexer 231 is configured to separate the signals of the transmission band and the reception band from each other. At this time, signals of a transmission band transmitted through the first and second power amplifiers 210 and 220 are applied to the antennas ANT1 and ANT4 through the first output ports of the duplexer 231. On the other hand, the signals of the reception band received through the antennas ANT1 and ANT4 are received by the low noise amplifiers 310 and 340 through the second output port of the duplexer 231.

The filter 232 may be configured to pass signals in a transmission band or a reception band and block signals in the other band. In this case, the filter 232 may be composed of a transmission filter connected to the first output port of the duplexer 231 and a reception filter connected to the second output port of the duplexer 231. Alternatively, the filter 232 may be configured to pass only signals in the transmission band or only signals in the reception band depending on the control signal.

The switch 233 is configured to deliver either a transmit signal or a receive signal. In one embodiment of the present invention, the switch 233 may be configured in the form of a single pole double throw (SPDT) to separate a transmission signal and a reception signal in a time division duplex (TDD) method. At this time, the transmission signal and the reception signal are signals of the same frequency band, and accordingly, the duplexer 231 may be implemented in a circulator form.

Meanwhile, in another embodiment of the present invention, the switch 233 is also applicable to a frequency division multiplexing (FDD) method. At this time, the switch 233 may be configured in the form of a double pole double throw (DPDT) to connect or block the transmission signal and the reception signal, respectively. Meanwhile, since the transmission signal and the reception signal can be separated by the duplexer 231, the switch 233 is not necessary.

Meanwhile, the electronic device according to the present invention may further include a modem 400 corresponding to the control unit. In this case, the RFIC 250 and the modem 400 may be referred to as a first controller (or first processor) and a second controller (second processor), respectively. Meanwhile, the RFIC 250 and the modem 400 may be implemented as physically separated circuits. Alternatively, the RFIC 250 and the modem 400 may be physically divided into logical or functional circuits.

The modem 400 may perform control and signal processing for transmission and reception of signals through different communication systems through the RFIC 250. The modem 400 may be obtained through control information received from a 4G base station and/or a 5G base station. Here, the control information may be received through a physical downlink control channel (PDCCH), but is not limited thereto.

The modem 400 may control the RFIC 250 to transmit and/or receive signals through the first communication system and/or the second communication system at specific time and frequency resources. Accordingly, the RFIC 250 may control transmission circuits including the first and second power amplifiers 210 and 220 to transmit a 4G signal or a 5G signal in a specific time period. In addition, the RFIC 250 may control reception circuits including the first to fourth low noise amplifiers 310 to 340 to receive a 4G signal or a 5G signal in a specific time period.

Meanwhile, a detailed operation and function of an electronic device that performs power control according to the present invention equipped with a multiple transmission/reception system as shown in FIG. 2 will be described below. In more detail, specific operations and functions of electronic devices that perform power control on transmission signals in a plurality of communication systems will be discussed below.

Meanwhile, the electronic device according to the present invention can operate in a plurality of communication systems. Specifically, an electronic device that performs interference avoidance according to the present invention is operable in a first communication system and a second communication system. For example, the first communication system may be a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system may be a 5G communication system operating in the millimeter wave frequency band. However, the present invention is not limited thereto, and may be changed according to application, and is applicable to all communication systems capable of generating interference with each other.

Meanwhile, FIG. 3A shows a detailed configuration of 5G RFFE and RFIC/IFIC according to an embodiment of the present invention. In addition, Figure 3b shows a detailed configuration of 5G RFFE and RFIC + IFIC integrated structure according to another embodiment of the present invention. Here, RFFE means an RF front end.

Referring to FIG. 3A, the first transceiver circuit 1260 and the second transceiver circuit 1270 are physically separated structures. Here, the first transceiver circuit 1260 may be a Sub6/LTE RFIC 1260. Meanwhile, the second transmission/reception circuit 1270 may be mmWave IFIC 1270. At this time, the Sub6/LTE RF band may be a 5 GHz band, and the mmWave IF band may be a 10 GHz band. Therefore, there is a problem that the harmonic signal of the Sub6/LTE RF signal in the 5 GHz band may cause interference in the mmWave IF signal. Here, the harmonic signal is a signal in the 10 GHz band, which is a frequency band twice that of the 5 GHz band signal. Therefore, the frequency band of the harmonic signal of the Sub6/LTE RF signal in the 5 GHz band becomes the 10 GHz band equal to the frequency band of the mmWave IF signal, and mutual interference occurs.

On the other hand, referring to Figure 3b, the first transceiver circuit and the second transceiver circuit may be provided as a physically integrated structure of the transceiver circuit 1250. In this one-piece structure, interference between the Sub6/LTE RF band and the mmWave IF band may be further increased.

On the other hand, in the structure of FIG. 3A, as shown in FIG. 3B, a future transceiver module 1250 may be promoted in the direction of integrating RF of mmWave and RF of Sub6 (LTE). As described above, the RFC/IFIC, which is an integrated RFIC/IFIC, has a merit of implementing the RFIC/IFIC more slim and integrating digital conversion. However, as it is physically implemented in one circuit, the interference problem between Sub6(LTE) RF and mmWave IF increases, and it is necessary to supplement/solve this.

In order to solve this problem, the present invention is to propose a method for avoiding interference based on frequency shift. In this regard, the present invention relates to an attempt to integrate mmWave's IF and RF of Sub6 (LTE). On the other hand, the RF 5GHz of Sub6 and the IF 10GHz of mmWave are two times the frequency difference, so a harmonic component may cause interference problems. Accordingly, the present invention proposes an RF/IF integrated transceiver structure to avoid interference with the frequency (and phase) of the mmWave IF VCO by shifting and multiplexing the RF VCO output frequency of Sub6 to improve the interference problem. .

Meanwhile, FIG. 4 shows a detailed configuration of an electronic device providing a plurality of wireless interfaces according to the present invention. Referring to FIG. 4, with the configuration of the RF/IF transmitter circuit 1250, the first VCO 1251a output for RF signal reception may be set (provided) as the VCO for mmWave signal transmission.

Further, the second VCO 1251b output for RF signal transmission may be set (provided) as the VCO for mmWave signal reception. Here, the first and second VCOs 1251a and 1251b may be referred to as first and second (local) oscillators, first and second (frequency) synthesizers, and the like.

Meanwhile, in the simultaneous operation of different radio interfaces (communication systems), the first and second VCOs 1251a and 1251b may be used. At this time, the IF frequency of the third VCO 1251c may be set to a variable value rather than a fixed value. As such, there is an advantage in that interference by the harmonic signal of the Sub6/LTE RF signal can be avoided by the mmWave band IF frequency set to a variable value.

Referring to FIG. 4, the electronic device according to the present invention includes a transceiver 1250 and a baseband processor 1400 corresponding to a modem. In addition, it may further include an RF transceiver circuit 1500 operating in the mmWave band.

The method for avoiding interference based on frequency shift according to the present invention is characterized by the following components. In this regard, the present invention may be implemented by omitting some components or changing some components.

a. A transceiver circuit 1250 including a first frequency converter of a first communication system, a second frequency converter of a second communication system, and an oscillator;

b. A modem, i.e., a baseband processor 1400, which controls the transceiver circuit such that a signal of a second frequency shifted and multiplyed to the first frequency of the oscillator is input to the second frequency converter;

c. The first frequency converter performs conversion between the first frequency and the RF frequency band, and the second frequency converter performs conversion between the second frequency and the IF frequency band,

d. If the baseband processor 1400 is connected to both the first and second communication systems,

e. An electronic device that changes the transition value of the first frequency in the transceiver circuit so that interference is reduced between the RF frequency band of the first communication system and the IF frequency band of the second communication system.

On the other hand, the transceiver circuit 1250 is composed of an RF transceiver circuit of the first communication system and an IF transceiver circuit of the second communication system. Here, the first communication system may be a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system may be a 5G communication system operating in the millimeter wave frequency band.

To this end, the transceiver circuit 1250 includes first frequency converters 1252a and 1252b of the first communication system, second frequency converters 1252c of the second communication system, and oscillators, that is, first and second VCOs 1251a, 1252b).

On the other hand, the baseband processor 1400 shifts the first frequency of the oscillator 1251a (multiply) and multiply multiply the signal of the second frequency converter 1252c to be input to the transceiver circuit 1250. To control. In this case, the first frequency converters 1252a and 1252b may perform conversion between the first frequency and the RF frequency band. Also, the second frequency converter 1252c may perform conversion between the second frequency and the IF frequency band. In addition, since the transmit/receive RF frequency converter is separately provided in the RF transmitter/receiver circuit 1500 operating in the mmWave band, there is an advantage in that the IF band can be implemented with one second frequency converter 1252c.

Meanwhile, the frequency-converted signal through the first frequency converter 1252a, 1252b may be frequency filtered through a filter, and then converted into a digital signal through an analog-to-digital converter (ADC). Accordingly, the first transmission signal and the first reception signal in the Sub6/4G band and the second transmission signal and the second reception signal in the mmWave band may be converted into digital signals. The digitally converted first transmission signal, the first reception signal, the second transmission signal, and the second reception signal may be transmitted to the baseband processor 1400 through digital MUX.

Meanwhile, the baseband processor 1400 may change the transition value of the first frequency in the transceiver circuit 1250 to reduce interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system. At this time, when the baseband processor 1400 is connected to both the first and second communication systems, the baseband processor 1400 may change the transition value of the first frequency. In other words, the transition value of the first frequency can be changed only when both the first and second communication systems are connected and interference between different radio interfaces occurs.

For example, in relation to the Sub 6 band, an RF signal having a 100 MHz bandwidth in a 5 GHz band is assumed. At this time, with respect to the first frequency shift value, when shifting from 5 GHz to 100 MHz and shifting to a frequency of 2 times, the mmWave IF frequency band becomes a 10.2 GHz band. In this case, when the mmWave IF frequency bandwidth has a 200 MHz bandwidth, the mmWave IF frequency band is 10.1 to 10.3 GHz band. On the other hand, since the Sub 6 band is 4.95 to 5.05 GHz, the band of the Sub 6 harmonic signal is 9.9 to 10.1 GHz. Therefore, there is no overlap between the 9.9 to 10.1 GHz band of the Sub 6 harmonic signal and the 10.1 to 10.3 GHz band of the mmWave IF frequency band. Accordingly, there is an advantage that interference between the Sub 6 RF signal and the mmWave IF signal can be avoided.

On the other hand, the electronic device according to the present invention may be provided with an antenna for each communication system. The first antenna ANT1 is configured to operate in the 5G Sub6/4G frequency band, and the second antenna ANT2 can be configured to operate in the millimeter wave frequency band. At this time, the second antenna ANT2 may be configured as an array antenna composed of a plurality of antenna elements for transmitting and receiving signals within a certain coverage in the millimeter wave frequency band.

Meanwhile, the baseband processor 1400 may change the frequency shift value as described above in order to reduce interference to the mmWave IF band according to transmission/reception of Sub6 band signals. In this regard, FIG. 5A shows a detailed configuration for avoiding interference into an mmWave IF band according to reception of a Sub6 band signal according to an embodiment of the present invention. Meanwhile, FIG. 5B shows an operation for each component of interference avoidance due to reception of a Sub6 band signal as shown in FIG. 5A.

Referring to FIG. 5A, the harmonic signal of the first received signal received through the first antenna ANT1 is set to a transition value of the first frequency so that interference to a signal (transmission/reception signal) of the IF frequency band is reduced. Can be changed. Specifically, the transition value of the first frequency may be changed so that the harmonic signal of the first received signal is reduced to the interference of the second IF transmission signal and the second IF reception signal in the IF frequency band of the 5G communication system. Here, the first frequency shift value is an output value of a frequency shifter (1253a, 1253b).

In this regard, if the harmonic signal of the first received signal interferes with the IF frequency band signal of the 5G communication system, it may affect the RF transmission/reception signal of the 5G communication system. For example, if the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band are in a collocated structure, intra-cell interference may occur due to the aforementioned interference. have.

In this regard, the harmonic signal of the first received signal is up-frequency converted and transmitted to the second base station through the second antenna ANT2 as the RF transmission signal of the 5G communication system. Accordingly, there is a problem that the interference in the cell increases. In addition, the RF reception signal of the 5G communication system is down-converted to the IF frequency band, and interference (in-cell interference) with the first reception signal may occur.

Meanwhile, if the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band have a stand-alone arrangement structure, inter-cell interference may occur due to the aforementioned interference.

In this regard, the harmonic signal of the first received signal is up-frequency converted and transmitted to the second base station through the second antenna ANT2 as the RF transmission signal of the 5G communication system. Accordingly, there is a problem in that interference between cells increases. In addition, the RF reception signal of the 5G communication system is down-converted to the IF frequency band, and interference (inter-cell interference) with the first reception signal may occur.

Meanwhile, referring to FIG. 5B, the electronic device corresponding to the terminal may perform the mmWave Tx operation (or mmWave Rx operation) according to the Sub6/LTE Rx operation (S110 ). At this time, the baseband processor (or control unit) 1400 corresponding to the modem may perform RFIC Synth Setting and mmWave RFIC IF Setting (S120). That is, the baseband processor (or control unit) 1400 may set a specific frequency of the oscillator 1251a. At this time, in order to avoid interference with the RF signal of Sub6, there is an advantage that the IF frequency of mmWave can be dynamically set through the frequency shifter 1253a and the frequency multiplier 1254a.

Meanwhile, the transceiver 1250 corresponding to the RF/IF IC has an RF VCO output, Freq. IF VCO Setting is performed by multiplying by frequency shift and multiplier with shifter (S130). That is, the transmitter/receiver circuit 1250 inputs the output of the first oscillator 1251a corresponding to Rx to the first frequency shifter 1253a to perform frequency shifting. In addition, the output of the first frequency shifter 1253a is input to the first frequency multiplier 1254a to perform frequency multiplication. Accordingly, it is possible to dynamically set the IF frequency of mmWave, thereby avoiding interference with the RF reception signal of Sub6.

Meanwhile, the RF transceiver circuit 1500 corresponding to mmWave RFIC may perform RF reception down converting and IF transmission up conversion, and perform RF/IF signal conversion (S140). At this time, the frequency of the third oscillator 1521 may be adjusted in consideration of the adjusted frequency by shifting to avoid interference. For example, if the IF frequency is adjusted by f _IF + 2*fs to avoid interference, the frequency of the third oscillator 1521 is adjustable to f _LO -2*fs.

Meanwhile, the above description also applies to a method for avoiding interference in mmWave IF band according to Sub6 band transmission. In this regard, FIG. 6A shows a detailed configuration for avoiding interference into an mmWave IF band according to transmission of a Sub6 band signal according to another embodiment of the present invention. Meanwhile, FIG. 6B shows an operation for each component of interference avoidance due to transmission of a Sub6 band signal as shown in FIG. 6A.

Referring to FIG. 6A, the harmonic signal of the first transmission signal transmitted through the first antenna ANT1 is set to a transition value of the first frequency so that interference to a signal (transmission/reception signal) of the IF frequency band is reduced. Can be changed. Specifically, the transition value of the first frequency may be changed so that the harmonic signal of the first transmission signal is reduced to the interference of the second IF transmission signal and the second IF reception signal of the IF frequency band of the 5G communication system. Here, the first frequency shift value is an output value of a frequency shifter (1253a, 1253b).

In this regard, when the 5G Sub 6 system operates with time division multiplexing (TDD), the first transition value and the second transition value of the first frequency for the first received signal and the first transmitted signal may be the same. . However, the present invention is not limited thereto, and the first shift value and the second shift value may be fine-tuned in consideration of specifically allocated frequency bands and interference.

On the other hand, when the 5G Sub 6 system operates with frequency division multiplexing (FDD), the first shift value and the second shift value of the first frequency for the first received signal and the first transmitted signal may be different. In this regard, the first shift value may be determined as an optimal value to avoid interference with the IF band in consideration of the frequency band of the first received signal. On the other hand, the second shift value may be determined as an optimal value to avoid interference with the IF band in consideration of the frequency band of the first transmission signal.

Meanwhile, referring to FIG. 6B, the electronic device corresponding to the terminal may perform an mmWave Rx operation (or mmWave Tx operation) according to the Sub6/LTE Tx operation (S210 ). At this time, the baseband processor (or control unit) 1400 corresponding to the modem may perform RFIC Synth Setting and mmWave RFIC IF Setting (S220). That is, the baseband processor (or control unit) 1400 may set a specific frequency of the oscillator 1251b. At this time, in order to avoid interference with the RF signal of Sub6, there is an advantage that the IF frequency of mmWave can be dynamically set through the frequency shifter 1253b and the frequency multiplier 1254b.

Meanwhile, the transceiver 1250 corresponding to the RF/IF IC has an RF VCO output, Freq. Perform IF VCO setting by multiplying with frequency shift and multiplier with shifter (S230). That is, the transmitter/receiver circuit 1250 inputs the output of the second oscillator 1251b corresponding to Rx to the second frequency shifter 1253b to perform frequency shifting. In addition, the output of the second frequency shifter 1253b is input to the second frequency multiplier 1254b so that frequency multiplication is performed. Accordingly, it is possible to dynamically set the IF frequency of mmWave, thereby avoiding interference with the RF transmission signal of Sub6.

Meanwhile, the RF transceiver circuit 1500 corresponding to mmWave RFIC may perform RF reception Down Converting and IF transmission Up Converting to perform RF/IF signal conversion (S240). At this time, the frequency of the third oscillator 1521 may be adjusted in consideration of the adjusted frequency by shifting to avoid interference. For example, if the IF frequency is adjusted by f _IF +2*fs to avoid interference, the frequency of the third oscillator 1521 is adjustable by f _LO -2*fs.

On the other hand, with the frequency shift based interference avoidance method according to the present invention, it is possible to dynamically adjust the beam pattern in order to reduce inter-cell interference in a stand-alone arrangement structure. In this regard, FIG. 7 is a conceptual diagram of a beam pattern adjustment method for avoiding interference between cells in a structure in which a plurality of base stations according to the present invention are arranged.

4 to 6B and 7, if the first base station and the second base station are in a standalone arrangement, the baseband processor 1400 RFs the phase of each antenna element of the second antenna ANT2 as follows. It can be controlled through the transceiver circuit 1500. To this end, the phase of the phase shifter 1510 connected to each antenna element of the RF transceiver circuit 1500 may be controlled. Here, the first base station and the second base station may be base stations of the 5G Sub6/4G communication system and base stations of the millimeter wave frequency band, respectively.

Specifically, the baseband processor 1400 may cause a null of a radiation pattern through the second antenna ANT2 to be formed in the direction of the first transmission signal and the first reception signal. To this end, the baseband processor 1400 RF transmits and receives the phase of each element of the second antenna ANT2 to reduce interference between cells of the first and second communication systems by a null formed at a specific angle. It can be controlled through the sub-circuit 1500. Specifically, interference information between cells of different communication systems may be shared through an interface between the first base station and the second base station, for example, an X2 interface. In this regard, as interference occurs between the harmonic signal of the 5G Sub6 RF band signal and the IF band signal of the millimeter wave frequency band, interference also occurs in the RF band signal of the millimeter wave frequency band.

Therefore, interference may occur in the cell of the second base station by the transmission signal to the first base station. In addition, interference may occur in the cell of the first base station by the transmission signal to the second base station.

In this regard, if the interference level in the cell of the first base station due to the transmission signal to the second base station is greater than or equal to a threshold, the UE may perform radiation pattern control. When the interference occurs, a main lobe is formed in the direction of the second base station, and a side lobe may be formed in the direction of the first base station.

Therefore, it is possible to adjust the null of the radiation pattern (radiation pattern) through the second antenna (ANT2) so that interference does not occur to the first base station by the side lobe (sidelobe) of the radiation pattern. To this end, the phase value of the phase shifter 1510 of FIG. 4 can be adjusted. In addition, the gain value or power value of the power amplifier and the reception amplifier connected to the second antenna ANT2 may be adjusted.

To this end, the baseband processor 1400, if the interference level of the cell of the first base station is greater than or equal to the threshold, the phase shifter 1510 and/or the power amplifier and the receive amplifier connected to the second antenna (ANT2) You can adjust the gain value or power value of. To this end, the baseband processor 1400 calculates the magnitude/phase value of a signal to be applied to each antenna element of the second antenna ANT2 based on a lookup table (LUT) or real-time processing when the interference level is greater than or equal to a threshold. Can be.

Accordingly, interference does not occur in the direction of the first base station due to sidelobe of the radiation pattern, and nulls of the radiation pattern may be formed in the direction of the first base station. Accordingly, even if the harmonic signal of the 5G Sub6 RF band signal and the mmWave IF band signal occur, there is an advantage that interference between cells can be prevented.

Accordingly, as illustrated in FIG. 7, transmission and reception of signals in the mmWave band are not performed in the first base station direction by the null in the first base station direction. Therefore, as described above, even if the interference between the 5G Sub6 RF transmission/reception signal and the mmWave IF signal occurs, there is an advantage in that inter-cell interference between the first base station and the second base station does not occur. In addition, interference between the Sub6 RF transmission/reception signal and the mmWave IF signal can be avoided, and inter-cell interference is further reduced through spatial diversity.

Meanwhile, referring to FIGS. 4 to 6B, the RF transceiver circuit 1500 is connected to the transceiver circuit 1250 and is configured to transmit and receive RF signals of the second communication system. Meanwhile, the RF transceiver circuit 1500 includes IF/ RF converters 1522a and 1522b that convert IF signals of the second communication system into RF signals.

On the other hand, the baseband processor 1400, based on the shifted first frequency value, the IF/ RF converters 1522a, 1522b such that the RF frequency of the RF signal of the second communication system is output equal to the RF frequency before the transition value. ) Can control the oscillation frequency. In this regard, the frequency of the third oscillator 1521 may be adjusted in consideration of the frequency adjusted by shifting to avoid interference. For example, if the IF frequency is adjusted by f _IF +2*fs to avoid interference, the frequency of the third oscillator 1521 is adjustable by f _LO -2*fs.

On the other hand, the transceiver circuit includes a frequency shifter (frequency shifter, 1253a, 1253b) and a frequency multiplier (frequency multiplier, 1254a, 1254b). The frequency shifters 1253a and 1253b are connected to the first frequency converters 1252a and 1252b, respectively. Meanwhile, the frequency multipliers 1254a and 1254b are connected to the frequency shifters 1253a and 1253b. At this time, a second frequency signal multiplied by the frequency multipliers 1254a and 1254b by the first frequency value shifted through the frequency shifters 1253a and 1253b may be input to the second frequency converter 1252c.

Meanwhile, the first frequency converters 1252a and 1252b include a first down converter 1252a connected to a receive amplifier LNA and a first up converter 1252b connected to a power amplifier PA.

Meanwhile, the IF/ RF converters 1522a and 1522b include a second down converter 1522a connected to a second receive amplifier operating in the second communication system and a second power amplifier connected to a second power amplifier operating in the second communication system. And an up converter 1522b. Here, the second reception amplifier and the second power amplifier are connected to each of the plurality of second antennas ANT2 through a duplexer (or switch). Meanwhile, the second reception amplifier and the second power amplifier may be connected to the phase shifter 1510 to perform transmission beamforming and reception beamforming. At this time, a phase shifter 1510 for transmitting beam forming and receiving beam forming may be separately provided. Alternatively, transmission beamforming and reception beamforming may be performed by the phase shifter 1510 for both transmission and reception.

Meanwhile, the second down converter 1522a and the second up converter 1522b may be connected to a plurality of second receive amplifiers and a plurality of second power amplifiers through a power divider and a power combiner. As described above, since a plurality of second receive amplifiers and a plurality of second power amplifiers are provided, there is an advantage that DC power consumption can be reduced more than in the case of one second receive amplifier and one power amplifier.

Meanwhile, the baseband processor 1400 may perform frequency shift before receiving a signal in the mmWave band in order to avoid interference when the transmission signal in the Sub6 band is greater than or equal to a threshold value. Accordingly, the method for avoiding interference according to the present invention has an advantage that the interference can be avoided by predicting it before the interference occurs.

To this end, the baseband processor 1400 may change the transition value of the first frequency when the first transmission signal of the first communication system is greater than or equal to a threshold value. Specifically, before receiving the second reception signal (or transmitting the second transmission signal) through the second communication system, the transmission/reception circuit 1250 may change the transition value of the first frequency. However, the present invention is not limited thereto, and prior to receiving the second received signal (or transmitting the second transmitted signal) through the second communication system based on the first received signal size of the first communication system, the transceiver circuit 1250 Can change the transition value of the first frequency.

Meanwhile, the baseband processor 1400 may change the frequency shift value in advance according to the degree of proximity of the frequency band that may cause interference.

To this end, the baseband processor 1400 receives the second received signal through the second communication system (or transmits the second transmitted signal) if the difference between the harmonic frequency of the first frequency and the second frequency is equal to or less than the second threshold value. ), the transmission/reception circuit 1250 may change the transition value of the first frequency. Here, the first frequency is the frequency of the signal input to the frequency shifters 1253a and 1253b, and the harmonic frequency of the first frequency is a frequency corresponding to a multiple of the first frequency. For example, the harmonic frequency of the first frequency is a frequency corresponding to twice the first frequency. The second frequency is the frequency of the signal output to the frequency multiplier 1254a, 1254b. However, the present invention is not limited thereto, and before the first reception signal is received (or the first transmission signal is transmitted) through the first communication system, the transition value of the first frequency may be changed in the transmission/reception circuit 1250.

Meanwhile, referring to FIGS. 4 to 6B, an electronic device performing interference avoidance between a plurality of wireless interfaces according to another aspect of the present invention includes a transceiver circuit 1250, a control unit 1400, and an RF transceiver circuit 1500 It can be configured to include.

The transceiver circuit 1250 is configured to include a first frequency converter of the first communication system, a second frequency converter of the second communication system, and an oscillator. Meanwhile, the RF transceiver circuit 1500 is connected to the transceiver circuit 1250 and is configured to transmit and receive RF signals of the second communication system.

Meanwhile, the control unit 1400 may control the phase transmitting and receiving circuit 1250 such that a signal of a second frequency that is multiply shifted and multiplied by the first frequency of the oscillator is input to the second frequency converter.

In addition, the control unit 1400 may change the transition value of the first frequency in the transceiver circuit 1250 so that interference is reduced between the RF frequency band of the first communication system and the IF frequency band of the second communication system. At this time, the first communication system is a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system may be a 5G communication system operating in the millimeter wave frequency band.

Meanwhile, the electronic device further includes a first antenna ANT1 operating in the 5G Sub6/4G frequency band and a second antenna ANT2 operating in the millimeter wave frequency band. Accordingly, the control unit 1400 is a harmonic signal of the first received signal received through the first antenna (ANT1) to the second IF transmission signal and the second IF received signal of the IF frequency band of the 5G communication system The first shift value of the first frequency may be changed so that interference is reduced. In addition, the harmonic signal of the first transmission signal transmitted through the first antenna (ANT1) is the first frequency of the first frequency so that interference to the second IF transmission signal and the second IF reception signal of the IF frequency band of the 5G communication system is reduced 2 You can change the transition value.

On the other hand, if the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band are in a standalone arrangement, the controller 1400 may perform the following mmWave beamforming. In this regard, the control unit 1400 may control to form a null of a radiation pattern through a second antenna in the directions of the first transmission signal and the first reception signal. Accordingly, the control unit 1400 may control the phase of each element of the second antenna through the RF transceiver circuit 1500 so that inter-cell interference of the first and second communication systems is reduced. have.

On the other hand, the RF transceiver circuit 1500 includes an IF/RF converter that converts the IF signal of the second communication system into an RF signal. At this time, based on the shifted first frequency value, the oscillation frequency of the IF/RF converter may be controlled such that the RF frequency of the RF signal of the second communication system is output equal to the RF frequency before the transition value.

On the other hand, the transceiver circuit 1250 is a frequency shifter (frequency shifter) connected to the first frequency converter; And a frequency multiplier connected to the frequency shifter. At this time, the second frequency signal in which the shifted first frequency value is multiplied through the frequency multiplier is input to the second frequency converter.

Meanwhile, the first frequency converter includes a first down converter connected to a receive amplifier and a first up converter connected to a power amplifier. At this time, the IF/RF converter includes a second down converter connected to a second receive amplifier operating in the second communication system. In addition, the IF/RF converter further includes a second up-converter connected to a second power amplifier operating in the second communication system.

Meanwhile, the second down converter and the second up converter may be connected to a plurality of second receive amplifiers and a plurality of second power amplifiers through a power divider and a power combiner.

In the above, electronic devices that perform interference avoidance between a plurality of air interfaces according to the present invention have been described. When describing the technical effect of the electronic device performing the interference avoidance as follows.

According to at least one embodiment of the present invention, by changing the transition value of the frequency shifter to reduce interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system, interference avoidance between a plurality of radio interfaces is avoided. It is possible.

Further, according to at least one embodiment of the present invention, it is possible to provide an electronic device capable of reducing the level of interference of an RF signal of a first communication system to an IF signal of a second communication system.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art, and thus, it should be understood that specific embodiments such as detailed description and preferred embodiments of the present invention are given as examples only.

In the context of the present invention described above, the design of the transmission unit including the power amplifier and the transceiver and the reception unit including the low-noise amplifier and the RFIC/IFIC and its driving can be implemented as computer readable code on a medium in which a program is recorded Do. The computer-readable medium includes all kinds of recording devices in which data that can be read by a computer system are stored. Examples of computer-readable media include a hard disk drive (HDD), solid state disk (SSD), silicon disk drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage device. This includes, and is also implemented in the form of a carrier wave (eg, transmission over the Internet). In addition, the computer may include a control unit (180, 250, 400, 1250, 1400) of the terminal. Accordingly, the above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Claims (18)

1. In electronic devices,

   A transceiver circuit comprising a first frequency converter of a first communication system, a second frequency converter of a second communication system and an oscillator; And

   And a baseband processor that controls the transceiver circuit so that a signal of a second frequency shifted and multiplyed to the first frequency of the oscillator is input to the second frequency converter,

   The first frequency converter performs conversion between the first frequency and the RF frequency band, and the second frequency converter performs conversion between the second frequency and the IF frequency band,

   If the baseband processor is connected to both the first and second communication systems,

   An electronic device that changes the transition value of the first frequency in the transceiver circuit so that interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system is reduced.
2. According to claim 1,

   The first communication system is a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system is a 5G communication system operating in the millimeter wave frequency band.
3. According to claim 2,

   A first antenna operating in the 5G Sub6/4G frequency band; And

   Further comprising a second antenna operating in the millimeter wave frequency band,

   The baseband processor,

   The first frequency of the first frequency so that the harmonic signal of the first received signal received through the first antenna is reduced interference to the second IF transmission signal and the second IF reception signal of the IF frequency band of the 5G communication system. An electronic device that changes the transition value.
4. According to claim 3,

   The baseband processor,

   Transition of the first frequency so that the harmonic signal of the first transmission signal transmitted through the first antenna is reduced to the interference of the second IF transmission signal and the second IF reception signal in the IF frequency band of the 5G communication system. An electronic device that changes values.
5. According to claim 3,

   If the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band are in a standalone arrangement,

   The control unit,

   In the direction of the first transmission signal and the first reception signal, a null of a radiation pattern through the second antenna is formed to inter-cell interference of the first and second communication systems (inter- An electronic device that controls the phase of each element of the second antenna through an RF transceiver circuit to reduce cell interference).
6. According to claim 1,

   It is connected to the transceiver circuit further comprises an RF transceiver circuit for transmitting and receiving RF signals of the second communication system,

   The RF transceiver circuit includes an IF/RF converter that converts the IF signal of the second communication system into an RF signal.
7. The method of claim 6,

   The baseband processor,

   Based on the shifted first frequency value, the electronic device to control the oscillation frequency of the IF/RF converter so that the RF frequency of the RF signal of the second communication system is output equal to the RF frequency before the transition value.
8. According to claim 1,

   The transceiver circuit,

   A frequency shifter connected to the first frequency converter; And

   And a frequency multiplier connected to the frequency shifter.

   An electronic device in which a third frequency signal in which the first frequency value shifted through the frequency shifter is multiplied through the frequency multiplier is input to the second frequency converter.
9. The method of claim 6,

   The first frequency converter includes a first down converter connected to a receive amplifier and a first up converter connected to a power amplifier,

   The IF/RF converter includes a second down converter connected to a second receive amplifier operating in the second communication system and a second up converter connected to a second power amplifier operating in the second communication system. device.
10. The method of claim 9,

    And the second down converter and the second up converter are connected to a plurality of second receive amplifiers and a plurality of second power amplifiers through a power divider and a power combiner.
11. According to claim 1,

    The baseband processor,

    If the first transmission signal of the first communication system is greater than or equal to a threshold,

    And receiving a second received signal through the second communication system, changing the transition value of the first frequency in the transceiver circuit.
12. According to claim 1,

    The baseband processor,

    If the difference between the harmonic frequency of the first frequency and the second frequency is less than or equal to a second threshold,

    And receiving a second received signal through the second communication system, changing the transition value of the first frequency in the transceiver circuit.
13. In electronic devices,

    A transceiver circuit comprising a first frequency converter of a first communication system, a second frequency converter of a second communication system and an oscillator;

    An RF transceiver circuit connected to the transceiver circuit and transmitting and receiving an RF signal of the second communication system; And

    And a control unit for controlling the circuit of the transmitting and receiving unit such that a signal of a second frequency shifted and multiplyed to the first frequency of the oscillator is input to the second frequency converter,

    The control unit,

    An electronic device that changes the transition value of the first frequency in the transceiver circuit so that interference between the RF frequency band of the first communication system and the IF frequency band of the second communication system is reduced.
14. The method of claim 13,

    The first communication system is a 5G Sub6/4G communication system operating in the 5G Sub6/4G frequency band, and the second communication system is a 5G communication system operating in the millimeter wave frequency band.
15. The method of claim 14,

    A first antenna operating in the 5G Sub6/4G frequency band; And

    Further comprising a second antenna operating in the millimeter wave frequency band,

    The control unit.

    The first frequency of the first frequency so that the harmonic signal of the first received signal received through the first antenna is reduced interference to the second IF transmission signal and the second IF reception signal of the IF frequency band of the 5G communication system. Change the transition value,

    Transition of the first frequency so that the harmonic signal of the first transmission signal transmitted through the first antenna is reduced to the interference of the second IF transmission signal and the second IF reception signal in the IF frequency band of the 5G communication system. An electronic device that changes values.
16. The method of claim 15,

    If the first base station of the 5G Sub6/4G communication system and the second base station of the millimeter wave frequency band are in a standalone arrangement,

    The control unit,

    In the direction of the first transmission signal and the first reception signal, a null of a radiation pattern through the second antenna is formed to inter-cell interference of the first and second communication systems (inter- An electronic device that controls the phase of each element of the second antenna through the RF transceiver circuit to reduce cell interference).
17. The method of claim 13,

    The RF transceiver circuit includes an IF/RF converter that converts the IF signal of the second communication system into an RF signal.

    Based on the shifted first frequency value, the electronic device to control the oscillation frequency of the IF/RF converter so that the RF frequency of the RF signal of the second communication system is output equal to the RF frequency before the transition value.
18. The method of claim 13,

    The transceiver circuit,

    A frequency shifter connected to the first frequency converter; And

    And a frequency multiplier connected to the frequency shifter.

    An electronic device in which a third frequency signal in which the first frequency value shifted through the frequency shifter is multiplied through the frequency multiplier is input to the second frequency converter.

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