KR102538025B1 - An wireless communication apparatus performing selective noise filtering and method of operation thereof - Google Patents

Abstract

An operation method of a wireless communication device including a plurality of internal devices according to an aspect of the technical idea of the present disclosure relates to noises generated in a plurality of state conditions created by controlling an operation mode of each of the internal devices. Generating and storing a plurality of pieces of noise information, receiving an RF signal from the outside, obtaining the magnitude of noise interfering with the RF signal from noise information corresponding to a current condition among the noise information, and and performing noise filtering based on the magnitude of the RF signal and the acquired noise magnitude.

Description

A wireless communication apparatus performing selective noise filtering and method of operation thereof {An wireless communication apparatus performing selective noise filtering and method of operation thereof}

The technical idea of the present disclosure relates to a wireless communication device, and in particular, to a wireless communication device that performs a highly reliable communication operation and an operating method thereof.

As the performance of internal components included in recent wireless communication devices (eg, displays, image sensors, application processors, memory controllers, memory devices, etc.) has improved, it performs fast operations that meet user needs. did However, since the internal devices perform operations based on a clock signal having a high frequency, the internal devices generate noise having a high frequency, and these noises are factors that degrade the communication performance (in particular, reception performance) of the wireless communication device. worked.

Conventionally, since the overall noise analysis of the wireless communication device was performed based on the signal received through a separate external antenna, it was not possible to directly determine the effect of the noise on the modem inside the wireless communication device. Accordingly, there is a problem in that communication performance degradation due to noise generated from internal devices of the wireless communication device cannot be effectively improved.

An object to be solved by the technical spirit of the present disclosure is to provide a wireless communication device capable of improving communication performance by selectively filtering noises of internal devices of the wireless communication device and an operating method thereof.

In order to achieve the above object, an operating method of a wireless communication device including a plurality of internal devices according to an aspect of the technical idea of the present disclosure includes a plurality of states created by controlling an operation mode of each of the internal devices. Generating and storing a plurality of noise information about noises generated in conditions, receiving an RF signal from the outside, disturbing the RF signal from noise information corresponding to a current state condition among the noise information Acquiring the size of noise and performing noise filtering based on the size of the RF signal and the acquired noise size.

A wireless communication device according to another aspect includes internal devices operating to provide various services to users, and a plurality of noise information about noises generated in a plurality of state conditions according to operation modes of each of the internal devices. The magnitude of noise disturbing the RF signal is obtained from a memory for storing, an RF integrated circuit for processing an RF signal received from the outside, and noise information corresponding to a current state condition among the noise information, and the magnitude of the RF signal and a modem performing noise filtering on the RF signal based on the acquired noise level.

In addition, in a non-transitory processor-readable storage medium containing instructions according to another aspect, when the instructions are executed by a processor in a wireless communication device, the processor performs operations of each of the internal devices of the wireless communication device. By controlling the mode, a plurality of noise information about noises generated in a plurality of state conditions are generated and stored, and among the noise information, noise information corresponding to the current state condition is used to determine the noise that interferes with the RF signal. A size is obtained, and noise filtering is performed based on the size of the RF signal and the acquired noise size.

When performing a wireless communication operation, the wireless communication device according to the present disclosure can quickly and accurately identify noise that interferes with an RF signal by referring to noise information, and improves communication performance of the wireless communication device by selectively filtering the noise. There is an effect that can be made.

1 is a diagram illustrating a wireless communication device performing a wireless communication operation and a wireless communication system including the same.
2 is a block diagram illustrating a wireless communication device according to an embodiment of the present disclosure, and FIG. 3 is a block diagram illustrating internal devices of the wireless communication device of FIG. 2 .
4 is a diagram for explaining an operation of generating noise information of a wireless communication device according to an embodiment of the present disclosure, and FIGS. 5A to 5C are diagrams illustrating state conditions according to an embodiment of the present disclosure.
6 is a flowchart illustrating a method of generating noise information of a wireless communication device according to an embodiment of the present disclosure.
7a and 7b are block diagrams illustrating a wireless communication device according to an embodiment of the present disclosure.
8 is a block diagram illustrating a wireless communication device according to an embodiment of the present disclosure, and FIGS. 9A and 9B are graphs for explaining how the power meter of FIG. 8 measures the magnitude of noise.
10 is a diagram for explaining noise information according to an embodiment of the present disclosure.
11 is a flowchart illustrating a method of generating noise information by separating noise for each frequency subband according to an embodiment of the present disclosure.
12 is a block diagram illustrating a wireless communication device supporting a fast Fourier transform function according to an embodiment of the present disclosure, FIG. 13 is a fast Fourier transform result graph for explaining frequency resolution, and FIG. 14 is one of the present disclosure. It is a diagram for explaining noise information according to an embodiment.
15 is a block diagram illustrating a wireless communication device supporting an automatic gain control function according to an embodiment of the present disclosure.
16 is a flowchart illustrating a selective noise filtering operation of a wireless communication device according to an embodiment of the present disclosure.
17 is a block diagram illustrating selective noise filtering of a wireless communication device according to an embodiment of the present disclosure.
18 is a block diagram illustrating an implementation example of the noise filter of FIG. 17 .
19A and 19B are diagrams showing spectrums of RF signals to show examples in which tonal noise is removed or attenuated by the noise filter of FIG. 18 .
20 is a block diagram illustrating a wireless communication device according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a wireless communication device performing a wireless communication operation and a wireless communication system including the same.

Referring to FIG. 1, a wireless communication system 1 includes a ^5th generation (5G) system, a Long Term Evolution (LTE) system, a Code Division Multiple (CDMA) system, a Global System for Mobile Communication (GSM) system, and a Wireless WLAN (WLAN) system. Local Area Network) system and the like. In addition, a CDMA system can be implemented with various CDMA versions such as Wideband CDMA (WCDMA), Time Division Synchronized CDMA (TD-SCDMA), and cdma2000.

The wireless communication system 1 may include at least two base stations 11 and 12; and a system controller 15. Meanwhile, this is an exemplary embodiment and is not limited thereto, and the wireless communication system 1 may include a plurality of base stations and a plurality of network entities. The wireless communication device 10 may be referred to as a user equipment, a mobile station, a mobile terminal, a user terminal, a subscribe station, a portable device, and the like. there is. Base stations 11 and 12 may refer to fixed stations that communicate with wireless communication device 10 and/or other base stations, and communicate with wireless communication device 10 and/or other base stations to transmit data signals. And / or a radio frequency (RF) signal including control information may be transmitted and received. The base stations 11 and 12 may also be referred to as a Node B, an evolved-Node B (eNB), a base transceiver system (BTS), and an access point (AP).

The wireless communication device 10 is capable of communicating with the wireless communication system 1 and receiving signals from the broadcast station 14 . Furthermore, the wireless communication device 10 may receive a signal from a satellite 13 of a Global Navigation Satellite System (GNSS). The wireless communication device 10 may support a radio technology for wireless communication (eg, 5G, LTE, CDMA, cdma2000, WCDMA, TD-SCDMA, GSM, 802.11, etc.).

The wireless communication device 10 may include a plurality of internal devices for providing various services that meet the user's needs. As described above, the internal devices may generate noise that may interfere with the RF signal received by the wireless communication device 10, and the noise generated from the internal devices may differ depending on the operation mode of the internal devices. there is. The operating mode includes the on/off state of the internal device, the operating state defined based on the magnitude of the frequency of the clock signal that is the basis for the operation of the internal device, and various operating states defined when the internal device is in the on state (e.g. , an active state or an idle state), and the like. The type of operation mode may be the same or different for each internal device.

The wireless communication device 10 according to an embodiment of the present disclosure may create a plurality of state conditions by controlling the operation modes of each of the internal devices, and may generate a plurality of noises related to noises generated in each state condition. information can be created. The state condition is a parameter classified according to the operating modes of internal devices, and for each state condition, at least one operating mode of internal devices may be different from the operating modes of other internal devices. The state condition may be set based on the operating modes of all internal devices of the wireless communication device 10, but is not limited thereto, and may be set based on the operating modes of only some of the internal devices of the wireless communication device 10. there is. Furthermore, internal devices requiring operation mode control to create state conditions may be configured as devices that operate based on a clock signal having a frequency higher than or equal to a reference value. The wireless communication device 10 may store generated noise information in an internal memory. The noise information may include frequency information and size information of noise generated from internal devices in respective state conditions. Noise information is described in detail in FIGS. 10 and 13 .

The wireless communication device 10 may perform selective noise filtering on the RF signal using noise information organized according to state conditions. Specifically, when the wireless communication device 10 receives an RF signal for wireless communication from the base station 11, the wireless communication device 10 detects a current state condition according to the current operation mode of internal devices, Among the noise information, the size of the noise interfering with the RF signal may be obtained from the noise information corresponding to the current state condition. The wireless communication device 10 may perform selective noise filtering based on the size of the RF signal and the acquired noise.

When performing a wireless communication operation, the wireless communication device 10 according to the present disclosure can quickly and accurately identify noise interfering with an RF signal by referring to noise information, and selectively filtering the noise so that the wireless communication device 10 ) has the effect of improving the communication performance (in particular, reception performance)

2 is one of the present disclosure in the examples represents a wireless communication device according to is a block diagram , Figure 3 shows internal devices of the wireless communication device of FIG. It is a block diagram .

Referring to FIG. 2 , the wireless communication device 100 may include an antenna 120, an RF integrated circuit 140, a modem 160, and a memory 180. The antenna 120 may receive an RF signal from the outside. The RF integrated circuit 140 may convert the RF signal into a baseband signal, and may process so that only the data signal may be amplified while maximally suppressing noise included in the RF signal. The modem 160 may demodulate a baseband signal into an information signal according to a corresponding communication method of the wireless communication device 100 . For example, the modem 160 may demodulate a baseband signal based on a communication method such as CDMA, WCDMA, HSDPA, LTE, or 5G.

Modem 160 may include a noise filter 162 and a baseband processor 164 . The baseband processor 164 according to an embodiment of the present disclosure may generate a plurality of noises related to noises generated in a plurality of state conditions according to an operation mode of the internal devices 170 (FIG. 3) of the wireless communication device 100. Noise information 182 may be generated and stored in the memory 180 . When generating the noise information 182, the baseband processor 164 may control the RF integrated circuit 140 so that the wireless communication device 100 does not receive or transmit an external signal through the antenna 120. .

Further referring to FIG. 3 , the wireless communication device 100 may include internal devices 170 . The internal devices 170 may include an application processor 171 , a display 172 , a memory controller 173 , a memory device 174 , an image sensor 175 (or a camera), and the like. The internal devices 170 may further include various devices for providing various services to users in addition to the devices 171 to 175 shown in FIG. 3 . The internal devices 170 may each operate in various operation modes based on a clock signal having a predetermined frequency. When the wireless communication device 100 performs wireless communication, at least one of the internal devices 170 may perform its own operation, and due to this operation, noises (N1-Nn) that interfere with wireless communication are can happen The RF integrated circuit 140 is designed with a structure suitable for receiving signals, and accordingly, various noises (N1-Nn) generated according to the operation mode of each of the internal devices 170 are generated by the RF integrated circuit 140 can flow into Frequency characteristics and noise sizes may be the same or different for each noise (N1-Nn).

Returning to FIG. 2 , the baseband processor 164 may generate noise information 182 using a noise signal output from the RF integrated circuit 140 in each of a plurality of state conditions. When performing wireless communication, the baseband processor 164 may obtain information on current state conditions according to current operation modes of the internal devices 170 (FIG. 3), and from the noise information 182. Noise information corresponding to the current state condition may be acquired. The baseband processor 164 may find the frequency band of the RF signal received for wireless communication, and may obtain the magnitude of noise that interferes with the RF signal using the frequency band of the RF signal and acquired noise information. The baseband processor 164 may control the noise filter 162 based on the size of the RF signal and the acquired noise, and through this, selective noise filtering may be performed. Specifically, the baseband processor 164 turns on (or activates) the noise filter 162 when the ratio between the size of the RF signal and the obtained noise level exceeds a threshold value, and the noise filter 162 transmits the RF signal. Noise filtering may be performed by passing , and when the ratio does not exceed a threshold value, the noise filter 162 may be turned off (or deactivated).

4 is a diagram for explaining an operation of generating noise information of a wireless communication device according to an embodiment of the present disclosure, and FIGS. 5A to 5C are diagrams illustrating state conditions according to an embodiment of the present disclosure . Hereinafter, when generating noise information, a method of controlling the operation mode of each of the internal devices will be described in detail.

Referring to FIG. 4 , the wireless communication device 100 may include a baseband processor 164, an application processor 171, and internal devices 170'. The baseband processor 164 may generate or update noise information at a predetermined cycle. Specifically, as the usage period of the wireless communication device 100 increases, the state of the internal devices 170' may change, and accordingly, the characteristics of noise generated from the internal devices 170' may change. . Accordingly, whenever a predetermined usage period of the wireless communication device 100 is achieved, the baseband processor 164 may generate or update noise information. Also, noise information may be generated or updated when the power of the wireless communication device 100 is turned on or rebooted. In addition, the period may be changed differently according to the usage period of the wireless communication device 100 .

The baseband processor 164 may provide an operation mode control request (CSReq) for controlling the operation mode of the internal devices 170' to the application processor 171 to generate noise information. In response to the operation mode control request CSReq, the application processor 171 may control the operation mode of the application processor 171 and the operation mode of each of the internal devices 170'. The application processor 171 may provide the baseband processor 164 with state condition information SC indicating a state condition according to an operation mode of the application processor 171 and each operation mode of the internal devices 170'. The baseband processor 164 may generate noise information generated in the state condition. Until the application processor 171 provides state condition information (SC) for all state conditions to the baseband processor 164, each of the internal devices 170' along with its 171 operation mode. An operation mode may be controlled, and the baseband processor 164 may generate a plurality of pieces of noise information corresponding to all state conditions. However, the embodiment described in FIG. 4 is only an exemplary embodiment, and is not limited thereto, and the baseband processor 164 directly controls the operation modes of the application processor 171 and the internal devices 170'. can do.

In FIGS. 5A to 5C , it is assumed that first to fourth internal devices are selected from among internal devices of the wireless communication device 100 to generate noise information. However, it is clear that this is only an exemplary embodiment and is not limited thereto.

Referring to FIG. 5A , the first state condition SC_1 may be a state in which only the first internal device among the first to fourth internal devices is turned on and the remaining internal devices are turned off. In the second state condition SC_2, only the second internal device among the first to fourth internal devices may be turned on, and the remaining internal devices may be in an off state. The third state condition SC_3 may be the first to fourth internal devices. Among the devices, only the third internal device may be turned on, and the other internal devices may be turned off. In the fourth state condition SC_4, only the fourth internal device among the first to fourth internal devices may be turned on, and the remaining internal devices may be turned off. The baseband processor 164 (FIG. 4) may generate noise information by analyzing noise received from the RF IC 140 (FIG. 3) for each state condition (SC_1-SC_4). In this way, the state conditions (SC_1-SC_4) may be defined to analyze noise generated by independent factors of each of the first to fourth internal devices.

Referring to FIG. 5B , the first state condition SC_1 may be a state in which the first and second internal devices among the first to fourth internal devices are turned on and the remaining internal devices are turned off. The second state condition SC_2 may be a state in which the first and third internal devices among the first to fourth internal devices are turned on and the remaining internal devices are turned off. The third state condition SC_3 may be a state in which the first and fourth internal devices among the first to fourth internal devices are turned on and the remaining internal devices are turned off. In the fourth state condition SC_4, the second and third internal devices among the first to fourth internal devices may be turned on, and the remaining internal devices may be turned off. The fifth state condition SC_5 may be a state in which the second and fourth internal devices among the first to fourth internal devices are turned on and the remaining internal devices are turned off. In the sixth state condition SC_6, the third and fourth internal devices among the first to fourth internal devices may be turned on, and the remaining internal devices may be turned off. The baseband processor 164 (FIG. 4) may generate noise information by analyzing noise received from the RF IC 140 (FIG. 3) for each state condition (SC_1-SC_6). As such, the state conditions (SC_1-SC_6) may be defined to analyze noise generated by complex factors of two internal devices among the first to fourth internal devices.

Referring to FIG. 5C , the first to fourth internal devices have two types of operation modes (the first internal device has 'A1' and 'A2' operation modes, and the second internal device has 'B1', 'B1' and 'A2' operation modes). It is assumed that it has an operating mode of 'B2', a third internal device has an operating mode of 'C1' and 'C2', and a fourth internal device has an operating mode of 'F1' and 'F2'. However, this is an exemplary embodiment and is not limited thereto, and the first to fourth internal devices may have different types of operation modes. In the first state condition SC_1, only the first internal device among the first to fourth internal devices may be turned on and operated in the 'A1' operation mode, and the remaining internal devices may be turned off. In the second state condition SC_2, only the first internal device among the first to fourth internal devices may be turned on and operated in the 'A2' operation mode, and the remaining internal devices may be turned off. Since the third to eighth state conditions (SC_3-SC_8) are similar to the first and second state conditions (SC_1 and SC_2), detailed descriptions thereof are omitted. The baseband processor 164 (FIG. 4) may generate noise information by analyzing noise received from the RF IC 140 (FIG. 3) for each state condition (SC_1-SC_8). In this way, the state conditions (SC_1 to SC_8) may be defined to analyze noise generated by independent factors of each of the first to fourth internal devices.

The embodiment described in FIGS. 5A to 5C is only an exemplary embodiment, but is not limited thereto, and the state condition is an internal device to effectively analyze internal noises that may interfere with RF signals for wireless communication operation. It can be set in various ways in consideration of the frequency of the clock signal, power consumption, etc., which are based on the operation of the .

6 is one of the present disclosure in the examples of wireless communication devices according to noise to explain how to generate information is a flowchart .

Referring to FIG. 6 , the wireless communication device may set a noise scan frequency range (S100). The frequency range of the RF signal that the wireless communication device can receive from the outside may be in a predetermined state, and the wireless communication device may set the noise scan frequency range based on the frequency range of the RF signal that can be received (S100). For example, operators providing wireless communication infrastructure are each assigned a frequency for providing wireless communication services, and information about the range of frequencies allocated to the operator among the operators to which they subscribe is stored in the wireless communication device in advance. can be stored Accordingly, the wireless communication device may set the noise scan frequency range based on the stored information about the frequency range of the RF signal. The noise scan frequency range may include a plurality of frequency bands. The frequency band may have a different width and a different center frequency depending on the communication method such as CDMA, WCDMA, HSDPA, LTE, 5G, etc., and the wireless communication device separates noise within the noise scan frequency range for each frequency band corresponding to the communication method. It can be done (S110). The wireless communication device may measure the size of noise in an n-th (where n is a natural number equal to or greater than 1) frequency band, and generate n-th noise information based on the measured noise level and the n-th frequency band corresponding thereto. (S120). The wireless communication device may determine whether the n-th frequency band is the last frequency band within the noise scan frequency range (S130). When the n-th frequency band is not the last frequency band (S130, NO), step S120 may be performed again by counting up n. When the n-th frequency band is the last frequency band (S130, YES), the wireless communication device may store a plurality of pieces of noise information in an internal memory (S150).

7a and 7b are part of the present disclosure in the examples It is a block diagram showing a wireless communication device according to the present invention.

Referring to FIG. 7A , a wireless communication device 200 may include an antenna 220, an RF integrated circuit 240, and a modem 260. The RF integrated circuit 240 may include a duplexer 241, a low noise amplifier 242, filters 243 and 245, a mixer 244, a local oscillator 246, a PLL circuit 247 and an RF controller 248. can Modem 260 may include a baseband processor 264 and a power meter 266 . The duplexer 241 may be controlled to use the antenna 220 for transmission or reception. In the following description, it is assumed that the RF integrated circuit 240 is in the reception mode. The low noise amplifier 242 may amplify noise and provide the amplified noise to the band pass filter 243 . The amplified noise may pass through the band pass filter 243, and the filtered noise may be frequency downconverted to a signal generated from the local oscillator 246 through a mixer 244. The converted noise may pass through the low pass filter 245 and be provided to the modem 260 as a noise signal N_B.

In one embodiment, the wireless communication device 100 is currently shielded and cannot receive an external signal EXT_S through the antenna 220, and noise caused by internal devices may be introduced into the RF integrated circuit 240. . In this case, the noise may be generated from internal devices in the n-th state condition. The baseband processor 264 may provide the noise information generation control signal NIG_CS to the RF controller 248, and the RF controller 248 may respond to the noise information generation control signal NIG_CS to the PLL circuit 247. A frequency control signal F_CS may be provided. The PLL circuit 247 may control the local oscillator 246 to generate a signal having a desired frequency based on the frequency control signal F_CS.

In one embodiment, the baseband processor 264 may change the frequency of the signal generated from the local oscillator 246 through the RF controller 246, and the band pass filter 243, the mixer 244, and the low pass filter Noise can be separated by frequency band using (245). The power measurer 266 may measure the magnitude of the noise signal N_B for each frequency band. Hereinafter, the magnitude of a signal may mean the power of a signal. The baseband processor 264 generates noise information about noise generated in the next state condition when the power measurer 266 measures all the amplitudes of the noise signal N_B for each frequency band in the nth state condition. can control.

Referring to FIG. 7B, unlike FIG. 7A, instead of shielding the wireless communication device 200, the RF controller 248 receives a control signal in response to the noise information generating control signal NIG_CS received from the baseband processor 264. By providing (DU_CS) to the duplexer 241, the connection between the antenna 220 and the RF integrated circuit 240 may be disconnected. Through this, the wireless communication device 200 may not receive a signal from the outside or transmit a signal to the outside while generating noise information.

However, the configuration of the RF integrated circuit 240 shown in FIGS. 7A and 7B is merely an exemplary embodiment, and is not limited thereto, and various implementations for effectively separating noise by frequency band may be applied. In addition, although the power meter 266 and the baseband processor 264 of the modem 260 are shown as separate components, they may be integrated and implemented as one component of the baseband processor 264 .

8 is one of the present disclosure in the examples represents a wireless communication device according to is a block diagram 9a and 9b show that the power meter of FIG. 8 of noise It is a graph to explain how to measure the size.

Referring to FIG. 8 , a wireless communication device 200 may include an antenna 220, an RF integrated circuit 240, a modem 260, and a memory 280. The modem 260 may include an ADC 261 , a power meter 265 and a baseband processor 266 . As described above with reference to FIGS. 7A and 7B , the modem 260 may receive noise signals separated by frequency bands from the RF integrated circuit 240 . The noise signal may be an analog signal generated by filtering noise generated from internal devices of the wireless communication device 200 by the RF integrated circuit 240 and down-converting the frequency under the nth state condition.

Referring further to FIG. 9A , noise N generated from internal devices in the n-th state condition may be separated into first to fourth frequency bands BAND_1-BAND_4 by the RF integrated circuit 240 . Widths and center frequencies of the first to fourth frequency bands (BAND_1-BAND_4) may vary depending on the communication method of the wireless communication device 200. The ADC 261 may convert noise signals corresponding to the first to fourth frequency bands BAND_1 to BAND_4 into digital signals and provide the converted digital signals to the power meter 265 . The power measurer 265 may measure the magnitudes of the received noise signals.

Referring further to FIG. 9B , the power measurer 265 may measure the magnitude of the noise signal N_BD by accumulating the magnitude of the noise signal N_BD converted to a digital signal for a predetermined accumulation time tacc. The accumulation time tacc may vary according to an environment for measuring the size of the noise signal N_BD.

The power measurer 265 may provide the measured magnitudes of the noise signals to the baseband processor 266, and the baseband processor 266 may use the magnitudes of the noise signals and a frequency band corresponding to each of the noise signals to generate noise signals. information can be generated. The baseband processor 266 may store generated noise information in the memory 280 . In addition, the baseband processor 266 may perform an operation to generate noise information corresponding to the next state condition after generating noise information corresponding to the n-th state condition.

10 is one of the present disclosure in the examples followed noise It is a diagram for explaining information.

Referring to FIG. 10 , the baseband processor 266 (FIG. 8) may store a plurality of generated noise information (NI_1, NI_2, ??) in the memory 280 (FIG. 8). Noise information may be defined as a state condition field, a frequency band field, and a noise magnitude field. For example, in the first noise information (NI_1), the noise corresponding to the first frequency band (BAND_1) has a first magnitude (Amp_1) under the first state condition (SC_1), and the second state condition (SC_2) The noise corresponding to the frequency band BAND_2 has a second magnitude Amp_2, the noise corresponding to the third frequency band BAND_3 in the third state condition SC_3 has a third magnitude Amp_3, and the fourth It may indicate that noise corresponding to the fourth frequency band (BAND_4) has a fourth magnitude (Amp_4) in the state condition (SC_4). In this way, the noise information may indicate the magnitude of noise for each frequency band corresponding to the state condition.

11 is a flowchart illustrating a method of generating noise information by separating noise for each frequency subband according to an embodiment of the present disclosure . Hereinafter, it is assumed that the wireless communication device supports the fast Fourier transform function.

Referring to FIG. 11, after performing step S110 (FIG. 6), the wireless communication device may perform a Fast Fourier Transform (FFT) operation on noise corresponding to the n-th frequency band (S122). . As a result of performing the fast Fourier transform operation, noise may be separated for each sub-carrier frequency. The inter-frequency spacing of sub-carriers may correspond to subcarrier spacing. The wireless communication device may measure the size of noise for each sub-carrier (S124). The wireless communication device may sum up noise levels for each sub-carrier based on the set frequency resolution (S126). The wireless communication device may generate n-th noise information using the summed noise levels and frequency subbands corresponding thereto (S128). Through this, the wireless communication device can generate noise information by measuring the size of the noise by separating the noise into frequency subbands, and can perform a more sophisticated noise filtering operation based on the noise information.

12 is one of the present disclosure in the examples high speed according to Fourier Indicates a radio communication device that supports translation capabilities is a block diagram , Figure 13 is a high-speed for explaining the frequency resolution Fourier It is a conversion result graph, and FIG. 14 is one of the present disclosure in the examples followed noise It is a diagram for explaining information.

Referring to FIG. 12 , a wireless communication device 200 may include an antenna 220, an RF integrated circuit 240, a modem 260, and a memory 280. Modem 260 may further include an FFT circuit 267 compared to FIG. 8 . Below, the operation of the FFT circuit 267 will be mainly described.

The FFT circuit 267 may receive the noise signals for each frequency band converted into digital signals from the ADC 261 . 13, the FFT circuit 267 may perform fast Fourier transform on the received noise signal corresponding to the first frequency band (BAND_1), and convert the noise signal to the centers of 'A1' to 'An'. frequency can be separated into sub-carrier frequencies. The sub-carrier frequency interval P1 may be determined according to a communication method of the wireless communication device 200 and may correspond to sub-carrier spacing.

The power measurer 265 may sum up noise levels for each sub-carrier frequency based on the set frequency resolution. The frequency resolution may be determined by the number of sub-carriers (P2) whose magnitudes are summed. For example, as the number of sub-carriers (P2) to which the magnitudes are added increases, the frequency resolution may be lowered, and as the number of sub-carriers (P2) to which the magnitudes are added is reduced, the frequency resolution may be increased. The frequency resolution may depend on the number of sub-carriers P2 whose magnitudes are summed, and may be changed by the baseband processor 266. A frequency domain corresponding to subcarriers whose magnitudes are summed may be defined as a frequency subband.

The power measurer 265 may provide the magnitudes of the noise signals measured according to the frequency resolution to the baseband processor 266, and the baseband processor 266 may provide the magnitudes of the noise signals and a frequency band corresponding to each of the noise signals. , noise information may be generated using frequency subbands within each frequency band.

Referring further to FIG. 14 , the baseband processor 266 ( FIG. 12 ) may store the generated noise information (NI_1, NI_2, ??) in the memory 280 (FIG. 12). Noise information may be defined as a state condition field, a frequency band field, a frequency sub-band field, and a noise magnitude field. For example, the first noise information NI_1 may indicate noise levels Amp_1, Amp_2, and Amp_3 for each frequency subband Sub_BAND_1a-Sub_BAND_3a in the first frequency band BAND_1 under the first state condition SC_1. there is. In this way, the noise information may indicate the magnitude of noise for each frequency sub-band within a frequency band corresponding to each state condition. Also, in the noise information, the higher the frequency resolution, the larger the number of frequency subbands in the frequency band, and the lower the frequency resolution, the smaller the number of frequency subbands in the frequency band.

15 is one of the present disclosure in the examples Representing a wireless communication device supporting an automatic gain control function according to It is a block diagram .

15, a wireless communication device 200 may include an antenna 220, an RF integrated circuit 240, a modem 260, and a memory 280. In the modem 260, a power meter 265, FIG. 8) may be implemented as an automatic gain control circuit 265'. The RF integrated circuit 240 may further include a variable gain amplifier 248 for amplifying a noise signal. Automatic gain control circuit 265' may control the gain of the variable gain amplifier 248 so that the variable gain amplifier 248 outputs an amplified noise signal having a constant amplitude. The size of an actual noise signal can be measured using gain-related information By applying automatic gain control to measure the size of a noise signal, the dynamic range that can distinguish the size of a noise signal can be effectively increased .

16 is one of the present disclosure in the examples Depending on the wireless communication device's optional noise filtering to explain the action is a flowchart .

Referring to FIG. 16, a wireless communication device may receive an RF signal for wireless communication from the outside (S200). The wireless communication device may acquire the frequency band of the RF signal and the magnitude of the RF signal (S210). For example, the wireless communication device may perform a cell search operation to find a physical broadcast channel (PBCH) and obtain information about a frequency band in which an RF signal exists from the PBCH. A wireless communication device may measure the size of an RF signal to conform to a communication standard method. For example, the magnitude of the measured RF signal may conform to one of RSSI (Received Signal Strength Indicator), RSRP (Reference Signal Received Power), and RSRQ (Reference Signal Received Quality) according to the communication method. RSSI represents the total size of all signals received by a wireless communication device, and may include interference and thermal noise of a channel adjacent to the signal. RSRP may be determined based on the size of the reference signal received by the wireless communication device. RSRQ may be determined based on a ratio of the magnitudes of all signals received by the wireless communication device to the magnitudes of the reference signals.

The wireless communication device may acquire current state conditions for internal devices (S220). The wireless communication device may include an application processor that controls internal devices, and may obtain state conditions corresponding to current operation modes of internal devices through the application processor. The wireless communication device may acquire the size of noise that disturbs the RF signal using the noise information corresponding to the current state condition and the frequency band of the RF signal (S230). For example, using FIG. 10, assuming that the current state condition corresponds to the first state condition SC_1 and the frequency band of the RF signal corresponds to the second frequency band BAND_2, the wireless communication device currently A second amplitude (Amp_2) may be obtained as the size of noise matching the frequency band (BAND_2) of the RF signal from the first noise information (NI_1) corresponding to the state condition (SC_1) of .

The wireless communication device may determine whether the ratio between the magnitude of the RF signal and the acquired noise exceeds a threshold value (S240). The threshold is a value preset in the wireless communication device and may be changed according to the communication environment of the wireless communication device. When the ratio exceeds the threshold (S240, YES), the wireless communication device may perform noise filtering (S250). Also, when the ratio does not exceed the threshold (S240, NO), the wireless communication device may not perform noise filtering (S260).

That is, when noise present in the same or similar frequency band as the RF signal seriously interferes with the RF signal, the wireless communication device may perform noise filtering to prevent communication performance deterioration due to the noise, and the noise may interfere with the RF signal. When there is no significant effect, noise filtering may be skipped to reduce power consumption by the noise filter.

17 is one of the present disclosure in the examples Optional of a wireless communication device according to noise filtering to explain It is a block diagram .

Referring to FIG. 17 , a wireless communication device 200 may include an antenna 220, an RF integrated circuit 240, a modem 260, and a memory 280. The modem 260 may include an ADC 261 , a noise filter 262 and a baseband processor 266 . When performing a wireless communication operation, the baseband processor 266 may obtain the magnitude of noise interfering with the RF signal received from the outside from the noise information 282 . Specifically, the baseband processor 266 may obtain information about current state conditions according to current operation modes of internal devices from the application processor 171 (FIG. 4). The baseband processor 266 accesses the memory 280, detects noise information corresponding to the current state condition among the noise information 282, and obtains the magnitude of noise interfering with the RF signal from the detected noise information. can

The baseband processor 266 turns on the noise filter 262 by providing a filter control signal F_CS to the noise filter 262 based on whether the ratio between the magnitude of the RF signal and the obtained noise magnitude exceeds a threshold value. (or activated) or turned off (or deactivated).

When the noise filter 262 is turned on, noise generated from internal devices existing in the same or similar frequency band to that of the RF signal may be removed from the RF signal.

18 is the same as that of FIG. 17 noise Representing an example implementation of a filter It is a block diagram .

Referring to FIG. 18 , the noise filter 262 may include a switch SW and a tone rejection filter 262a. The tone rejection filter 262a may include digital mixers 262a_1 and 262a_3 and a high pass filter 262a_2. The tone rejection filter 262a converts the frequency of the noise to be removed into a direct current (DC) signal (or converts it into a low frequency band) through the digital mixer 262a_1, and passes it through the high pass filter 262a_2 to generate noise. can be removed. As an embodiment, the high pass filter 262a_2 may be implemented as an infinite impulse response (IIR) filter, a finite impulse response (FIR) filter, or the like, and the high pass filter 262a_2 may operate as a DC remover. Thereafter, it may be converted into a signal of an original frequency band through a digital mixer 262a_3.

In addition, the baseband processor 266 (FIG. 17) may control on/off of the noise filter 262 by controlling the switch SW. However, the implementation example of the noise filter 262 of FIG. 18 is only an exemplary embodiment, but is not limited thereto, and the noise filter 262 can be implemented in various ways in a configuration capable of removing noise and controlling on/off. there is.

19a and 19b are shown in FIG. 18 noise toned by filter noise It is a diagram showing the spectrum of an RF signal to show examples of being removed or attenuated.

Referring to FIG. 19A, the RF signal received by the wireless communication device may be subject to degradation of communication performance (in particular, reception performance) due to inflow of tone noise generated from internal devices. Therefore, a wireless communication device according to an embodiment of the present disclosure obtains information on tone noise that interferes with an RF signal from noise information and performs noise filtering to remove the tone noise. can

Referring further to FIG. 19B, when the ratio between the size of the RF signal and the size of the tone noise exceeds a threshold value, the wireless communication device performs tone rejection filtering on the tone noise through a noise filter. can be performed. As a result, communication performance can be improved by removing tone noise that seriously interferes with RF signals.

20 is one of the present disclosure to the examples represents a wireless communication device according to It is a block diagram .

Referring to FIG. 20, as an example of a communication device, a wireless communication device 1000 includes an application specific integrated circuit (ASIC) 1010, an application specific instruction set processor (ASIP) 1030, a memory 1050, and a main processor 1070. ) and a main memory 1090. Two or more of ASIC 1010, ASIP 1030 and main processor 1070 may communicate with each other. Also, at least two or more of the ASIC 1010, the ASIP 1030, the memory 1050, the main processor 1070, and the main memory 1090 may be embedded in one chip.

The ASIP 1030 is an integrated circuit customized for a specific purpose, and may support a dedicated instruction set for a specific application and execute instructions included in the instruction set. The memory 1050 may communicate with the ASIP 1030 and may store a plurality of instructions executed by the ASIP 1030 as a non-temporary storage device, and the memory 1050 may, for example, RAM (Random Access Memory) ), read only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and combinations thereof, and may include any type of memory accessible by the ASIP 1030. The ASIP 1030 or the main processor 1070 generates noise information about noises generated from internal devices as described in FIG. 1 by executing a series of instructions stored in the memory 1050, and the noise information Selective noise filtering can be performed using

The main processor 1070 may control the wireless communication device 1000 by executing a plurality of instructions. For example, the main processor 1070 may control the ASIC 1010 and the ASIP 1030, process data received through a wireless communication network, or process a user's input to the wireless communication device 1000. may be The main memory 1090 may communicate with the main processor 1070 and may store a plurality of instructions executed by the main processor 1070 as a non-temporary storage device.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

Claims (20)

A method of operating a wireless communication device including a plurality of internal components,
generating and storing a plurality of pieces of noise information about noises generated in a plurality of state conditions created by controlling an operation mode of each of the internal devices;
Receiving an RF signal from the outside;
obtaining the magnitude of noise generated by the internal devices and interfering with the RF signal from noise information corresponding to a current state condition among the noise information; and
and selectively performing noise filtering based on a ratio between the magnitude of the RF signal and the obtained noise magnitude. According to claim 1,
In the step of generating and storing the noise information,
The method of operation of a wireless communication device, characterized in that the wireless communication device does not receive or transmit a signal through an antenna. According to claim 1,
The noise information,
A method of operating a wireless communication device comprising frequency information and magnitude information of noise generated in each of the state conditions. According to claim 1,
Generating and storing the noise information,
and generating the noise information using a noise signal output from an RF integrated circuit of the wireless communication device in each of the state conditions. According to claim 1,
In the step of generating and storing the noise information, a plurality of loops are included, and an nth loop among the loops (where n is a natural number equal to or greater than 1),
filtering noise generated in the n-th state condition for each of various frequency bands, and measuring the size of the noise for each frequency band; and
and generating n-th noise information using the measured noise level for each frequency band. According to claim 5,
The step of measuring the magnitude of noise for each frequency band,
A method of operating a wireless communication device, characterized in that, based on fast Fourier transform, the noise for each frequency band is separated for each sub-carrier frequency, and the magnitude of the noise for each sub-carrier is measured. According to claim 6,
Generating the n-th noise information,
summing up the magnitudes of noise for each sub-carrier frequency measured based on the set frequency resolution; and
and generating the n-th noise information using the summed magnitude of the noise and a frequency subband corresponding thereto. According to claim 1,
The step of obtaining the magnitude of the noise,
The method of operating a wireless communication device, characterized in that by matching the noise information corresponding to the current state condition with a frequency band of the RF signal, and acquiring the magnitude of the noise based on the matching result. According to claim 1,
The magnitude of the RF signal is
A method of operating a wireless communication device, characterized in that it conforms to any one of RSSI (Received Signal Strength Indicator), RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality). According to claim 1,
The step of performing the noise filtering,
Comparing a ratio between the magnitude of the RF signal and the obtained noise magnitude and a threshold value; and
The method of operating a wireless communication device further comprising the step of determining whether or not to perform the noise filtering based on the comparison result. According to claim 1,
The step of performing the noise filtering,
A method of operating a wireless communication device, characterized in that for removing the noise that interferes with the RF signal using a tone rejection filter. Internal devices that operate to provide various services to users;
a memory for storing a plurality of pieces of noise information about noises generated in a plurality of state conditions according to operation modes of each of the internal devices;
an RF integrated circuit that processes an RF signal received from the outside; and
Among the noise information, the size of the noise generated by the internal devices and interfering with the RF signal is obtained from noise information corresponding to the current state condition, and the ratio between the size of the RF signal and the obtained noise is determined. A wireless communication device comprising a modem selectively performing noise filtering on the RF signal based on the According to claim 12,
The modem is
When generating the noise information, the wireless communication device characterized in that for controlling the RF integrated circuit not to receive a signal from the outside. According to claim 13,
The modem is
The wireless communication device, characterized in that for generating the noise information based on the frequency band of the noise signal output from the RF integrated circuit and the magnitude of the signal for each frequency band in each of the state conditions. According to claim 14,
The RF integrated circuit further includes a variable gain amplifier,
The modem is
and controlling the gain of the variable gain amplifier so that the noise signal has a constant level, and measuring the level of the signal for each frequency band using a gain value of the variable gain amplifier. According to claim 14,
The RF integrated circuit further includes a filter,
The modem is
Controlling the RF integrated circuit to change the degree of frequency down-conversion of the noise signal, and separating the noise signal for each frequency band by passing the frequency down-converted noise signal through the filter. . According to claim 12,
The wireless communication device further includes an application processor that manages operations of the internal devices,
The modem is
and obtaining information indicating the current state condition according to the current operation mode of each of the internal devices from the application processor. According to claim 12,
The modem is
Detecting noise information that matches the frequency band of the RF signal among the noise information, and acquiring the magnitude of the noise interfering with the RF signal from the matched noise information. According to claim 12,
The modem further includes a noise filter,
and controlling on/off of the noise filter based on whether a ratio between the RF signal level and the obtained noise level exceeds a threshold value. A non-transitory processor-readable storage medium containing instructions, comprising:
When the instructions are executed by a processor in the wireless communication device, the processor:
Generating and storing a plurality of noise information about noises generated in a plurality of state conditions created by controlling the operation mode of each of the internal devices of the wireless communication device;
Obtaining the magnitude of noise generated by the internal devices and disturbing the RF signal from noise information corresponding to a current state condition among the noise information;
and selectively performing noise filtering based on a ratio between the magnitude of the RF signal and the obtained noise magnitude.

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