WO2023189460A1 - 受信装置、受信方法、並びにプログラム - Google Patents

受信装置、受信方法、並びにプログラム Download PDF

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Publication number
WO2023189460A1
WO2023189460A1 PCT/JP2023/009514 JP2023009514W WO2023189460A1 WO 2023189460 A1 WO2023189460 A1 WO 2023189460A1 JP 2023009514 W JP2023009514 W JP 2023009514W WO 2023189460 A1 WO2023189460 A1 WO 2023189460A1
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Prior art keywords
gain
low
noise
signal
interference
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PCT/JP2023/009514
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English (en)
French (fr)
Japanese (ja)
Inventor
均 富山
嗣也 北山
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Sony Semiconductor Solutions Corp
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Sony Semiconductor Solutions Corp
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Priority to US18/849,517 priority Critical patent/US20250219665A1/en
Priority to JP2024511682A priority patent/JPWO2023189460A1/ja
Publication of WO2023189460A1 publication Critical patent/WO2023189460A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Definitions

  • the present technology relates to a receiving device, a receiving method, and a program, and for example, to a receiving device, a receiving method, and a program that can perform reception with reduced influence of interference waves.
  • IoT Internet of Things
  • LPWA Low Power Wide Area
  • LPWAN Low Power Wide Area Network
  • Patent Document 1 proposes, in a receiver capable of processing a plurality of frequencies, to select a frequency that is less affected by interference waves as a frequency to be used, based on frequency information and level in which interference waves are included.
  • the present technology has been developed in view of this situation, and is intended to enable reception with reduced effects of interference waves.
  • a receiving device includes a low-noise amplification unit into which a received signal is input, and a search process that searches for interference waves and sets a gain of the low-noise amplification unit that reduces the influence of the interference waves.
  • a receiving device comprising: a.
  • a receiving device including a low-noise amplification section into which a received signal is input searches for interference waves and adjusts the gain of the low-noise amplification section to reduce the influence of the interference waves. This is the reception method to be set.
  • a program according to an aspect of the present technology is such that a computer controlling a receiving device including a low-noise amplification unit to which a received signal is input searches for interference waves, and the low-noise amplification unit reduces the influence of the interference waves.
  • This is a program for executing processing including a step of setting the gain of .
  • a receiving device, a receiving method, and a program according to one aspect of the present technology include a low-noise amplification section into which a received signal is input, a low-noise amplification section that searches for interference waves, and reduces the influence of the interference waves. The gain of is set.
  • the receiving device may be an independent device or may be an internal block forming one device.
  • program can be provided by being transmitted via a transmission medium or by being recorded on a recording medium.
  • FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present technology is applied.
  • FIG. 3 is a diagram for explaining interference waves. It is a diagram showing an example of the configuration of a terminal.
  • FIG. 3 is a diagram for explaining reception timing.
  • FIG. 3 is a diagram for explaining the timing of execution of search processing.
  • 3 is a flowchart for explaining terminal processing. It is a figure which shows an example of a receiver characteristic table.
  • FIG. 2 is a diagram for explaining how to search for interference waves. It is a figure which shows an example of an interference wave information table.
  • FIG. 3 is a diagram for explaining IM3. It is a figure showing the calculation result of IM3.
  • FIG. 3 is a diagram showing an example of the value of IM3 regarding interference waves.
  • FIG. 3 is a diagram for explaining how to set a gain.
  • FIG. 3 is a diagram for explaining the relationship between the gain of LNA and IIP3.
  • FIG. 3 is a diagram for explaining the relationship between noise and IM3.
  • FIG. 3 is a diagram for explaining a recording medium.
  • FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present technology is applied.
  • the information processing system 1 includes terminals 11-1 to 11-3 and a base station 12.
  • the information processing system 1 is a system that exchanges data between the terminals 11-1 to 11-3 and the base station 12.
  • the information processing system 1 can be applied to, for example, an IoT (Internet of Things) related system.
  • the terminal 11 and the base station 12 communicate using, for example, LPWA (Low Power Wide Area) or LPWAN (Low Power Wide Area Network).
  • terminals 11-1 to 11-3 individually, they will simply be referred to as the terminal 11. Other parts will be described in the same way.
  • the transmitter 13-1 and the transmitter 13-2 are devices that transmit signals that have an adverse effect on the terminal 11-1 communicating with the base station 12.
  • the signal emitted by the transmitter 13 will be referred to as an interference wave.
  • the influence of the interference waves emitted by the transmitters 13-1 and 13-2 on the terminal 11-1 will be explained with reference to FIG. 2.
  • the transmitter 13-1 transmits a signal (assumed to be interference wave A) of frequency A and signal strength P1.
  • the transmitter 13-2 transmits a signal (assumed to be interference wave B) of frequency B and signal strength P1.
  • the transmitter 13-3 transmits a signal having a frequency C and a signal strength P2 (assumed to be an interference wave C)
  • the transmitter 13-4 transmits a signal having a frequency F and a signal strength P2.
  • a signal (designated as interference wave F) is transmitted.
  • the signal used by the terminal 11-1 to communicate with the base station 12 is a signal of frequency D and signal strength P4.
  • the signal received by this terminal 11-1 is appropriately described as a desired wave.
  • the trapezoid surrounding the arrow representing the signal of frequency D represents the reception band of the terminal 11-1.
  • a modulated wave is generated due to intermodulation between interference wave A and interference wave B, and this modulated wave is the signal shown by the broken line in FIG. Become. Since this modulated wave E is within the reception band of the terminal 11-1, it is difficult to attenuate the modulated wave E with a predetermined filter, which affects the reception of the desired wave.
  • Signal strength P1, signal strength P2, signal strength P3, and signal strength P4 are strong in this order. For example, if a signal with a signal strength of 60 db or more adversely affects terminal 11-1 due to the influence of intermodulation as described above, in the situation shown in Figure 2, interference wave A and interference wave
  • the interference wave B corresponds to a disturbance wave that causes an adverse effect
  • the interference wave C and the interference wave D do not fall under the interference wave that causes an adverse effect.
  • the communication distance between the terminal 11 and the base station 12 is long, for example, several tens of kilometers, and the output of the transmitted signal from the base station 12 is small, several hundred mV. Therefore, the strength of the received signal reaching the terminal side (in Figure 2 The signal strength P4) is low and may be below the level of noise such as thermal noise. Since the desired wave is a weak radio wave, it is desirable to reduce the influence of the modulated wave E and the like as much as possible so that the desired wave can be received well.
  • the terminal 11 which will be explained below, can reduce the influence of interference waves and improve reception of desired waves without changing the frequency.
  • FIG. 3 is a diagram showing an example of the configuration of the terminal 11.
  • the terminal 11 is a direct conversion receiving device that receives orthogonally modulated signals.
  • the present technology can be applied not only when the terminal 11 is a device that only performs reception, but also when it is a device that performs reception and transmission.
  • the configuration of the receiving part of the terminal 11 will be explained, and the description of the configuration of the transmitting part will be omitted.
  • the terminal 11 includes an antenna 21, a low noise amplifier circuit 22, mixer circuits 23A, 23B, a local oscillation circuit 24, LPF (Low Pass Filter) 25A, 25B, amplifier circuits 26A, 26B, and ADC (Analog to Digital Converter) 27A, 27B. , a signal processing section 28, and a search processing section 29.
  • LPF Low Pass Filter
  • ADC Analog to Digital Converter
  • the low-noise amplification circuit 22 is a circuit that amplifies the weak signal Srf0 having a high frequency component of frequency frf, which is received by the antenna 21, and outputs it as a signal Srf.
  • the signal-to-noise ratio (S/N ratio) of the terminal 11 as a whole can be increased, thereby making it possible to receive weak radio waves. It looks like this.
  • the low noise amplifier circuit 22 is configured to be able to operate with a low power supply voltage.
  • the local oscillation circuit 24 is an oscillation circuit that generates signals SI (SIP, SIN) and SQ (SQP, SQN) having the same frequency flo as the carrier wave, and is configured by, for example, a frequency synthesizer using a PLL (Phase Locked Loop). It is something that will be done.
  • the signal SI is for extracting an in-phase component from the signal Srf in a mixer circuit 23A to be described later
  • the signal SQ is for extracting a quadrature component from the signal Srf in a mixer circuit 23B to be described later.
  • Signal SIP and signal SIN have a phase difference of 180 degrees from each other
  • signal SQP and signal SQN have a phase difference of 180 degrees from each other.
  • the signal SQP has a phase delayed by 90 degrees from the signal SIP
  • the signal SQN has a phase delayed by 90 degrees from the signal SIN.
  • the mixer circuit 23A extracts the in-phase component of the signal Srf by multiplying the output signal Srf of the low-noise amplifier circuit 22 and the signal SI (SIP, SIN) and down-converting the signal.
  • the mixer circuit 23B extracts orthogonal components of the signal Srf by multiplying the output signal Srf of the low-noise amplifier circuit 22 and the signal SQ (SQP, SQN) and down-converting the resultant signal.
  • the LPFs 25A and 25B are low-pass filters for removing unnecessary frequency components, such as frequency (frf+flo) components, that occur when the signal Srf is multiplied by the signals SI and SQ in the mixer circuits 23A and 23B, respectively.
  • the amplifier circuits 26A and 26B are circuits that amplify the output signals of the LPFs 25A and 25B, respectively.
  • the ADCs 27A and 27B have a function of binarizing the output signals of the amplifier circuits 26A and 26B, respectively, and converting them into digital signals.
  • the signal processing unit 28 performs predetermined signal processing (baseband processing) according to the communication protocol based on the digital signal related to the in-phase component supplied from the ADC 27A and the digital signal related to the orthogonal component supplied from the ADC 27B. This circuit performs the processing and supplies the information to the search processing section 29.
  • the search processing unit 29 executes processing to search for interference waves, which will be described below, and executes processing to adjust the gain of the low-noise amplifier circuit 22.
  • FIG. 4 is a diagram for explaining the time transition of the communication method in the terminal 11.
  • Communication between the terminal 11 and the base station 12 uses the same frequency, and transmission and reception are performed alternately.
  • squares without diagonal lines represent uplinks (transmission), and squares with diagonal lines represent downlinks (reception).
  • the downlink signal is transmitted every 5 seconds, and the signal to be received is included in 0.4 seconds.
  • the numerical values shown in FIG. 4 are an example and are not a limitation.
  • the terminal 11 searches for interference waves before receiving the downlink signal, and as a result of the search, executes processing to reduce the influence of the detected interference waves. .
  • FIG. 5 is a diagram for explaining the timing at which the search process is executed.
  • the horizontal axis represents time and the vertical axis represents frequency.
  • the frequencies of desired wave D (signal from base station 12), interference wave B, and interference wave A are higher in that order. It is said that the arrangement is Interfering wave B is always output, and interfering wave A is output during a time period overlapping with the downlink signal.
  • the transmission signal from the base station 12 is transmitted (received) at predetermined intervals, such as every 5 seconds.
  • the search process is performed at a predetermined cycle. In the example shown in FIG. 5A, the search process is executed at time t1, time t2, time t3, time t4, and time t5.
  • the result of the search process performed at time t1 is reflected, and the process for desired wave D received after time t1 is executed.
  • the result of the search process performed at time t4 is reflected, and the process for desired wave D received after time t4 is executed.
  • the search process performed at time t5 is performed while receiving signals from the base station.
  • the search process may not be executed (stopped) even if a predetermined interval has elapsed and it is time for the search process to be performed. .
  • FIG. 5B is a diagram for explaining the timing of the search process when the terminal 11 side recognizes the timing at which the transmission signal is transmitted from the base station 12.
  • the terminal 11 executes the search process before receiving the signal from the base station 12, at time t11 and time t12 in FIG. 5B.
  • the search process may be performed immediately before receiving the signal from the base station 12, or may be performed a predetermined time earlier.
  • the result of the search process performed at time t11 is reflected, and the process for desired wave D received after time t11 is executed.
  • the result of the search process performed at time t12 is reflected, and the process for desired wave D received after time t12 is executed.
  • the search process is basically executed periodically. That will happen.
  • the base station 12 since the base station 12 transmits data periodically, even if the terminal 11 side performs the search process at the timing of signal reception, the search process will not be performed periodically. That will happen.
  • the search process is executed at the timing when the signal from the base station 12 is received, it can be handled even when the transmission cycle of the signal from the base station 12 is changed, and the number of times the search process is executed can be reduced. , can be set appropriately. Therefore, the power and processing time required for search processing can be reduced.
  • the interference wave search process performed by the terminal 11 will be explained with reference to the flowchart shown in FIG.
  • the interference wave search process is executed in the search processing section 29 (FIG. 3).
  • a receiver performance table is created.
  • the receiver performance table is a table regarding the performance related to the receiving function of the terminal 11, and is a table as shown in FIG. 7, for example.
  • the items in the receiver performance table are the gain of the low-noise amplifier circuit 22 (VAGC), the output gain from the LPF 25 (GAIN), the noise figure (Noise Figure: NFdsb), A modulation distortion intercept point (IIP3) is provided.
  • the low noise amplifier circuit 22 is configured to be able to change the gain in 3 dB increments from -30 dB to 21 dB. As a result of searching for interference waves, the gain of the low-noise amplifier circuit 22 is set to a gain that is less susceptible to interference waves, and the gain that can be set is listed in the VAGC column. For each gain, GAIN, NFdsb, and IIP3 are described in association with each other.
  • the receiver performance table shown in FIG. 7 is obtained at the time of circuit design and stored in the search processing section 29 (FIG. 3).
  • the receiver performance table shown in Figure 7 for example, when VAGC is "-30", GAIN is “3.396”, NFdsb is “52”, and IIP3 is "-0.655". are listed in relation to each other. For example, when VAGC is "-27”, it is written that GAIN is "6.282”, NFdsb is "49.11”, and IIP3 is "-0.655" in association with each other.
  • GAIN, NFdsb, and IIP3 according to VAGC are described in association with each other.
  • step S11 Since the receiver performance table is acquired at the time of circuit design and stored in the search processing unit 29, the process of step S11 can be omitted after storage.
  • the processing performed every time the interference wave search processing is executed is the processing from step S12 onwards.
  • step S12 a search for interference waves is performed. How to search for interference waves will be explained with reference to FIG. Although FIG. 8 is the same as the graph shown in FIG. 2, it only shows interference waves A, interference waves B, interference waves C, and interference waves F that can be interference waves.
  • the gain of the low-noise amplifier circuit 22 is set to a predetermined gain, for example, 21 db. Interference waves are detected while changing the receiving frequency band.
  • the search processing unit 29 (FIG. 3) changes the reception band while controlling the local oscillation circuit 24, receives a signal in the changed reception band, and when received, changes the frequency and signal that were set at that time. Retain strength in association.
  • the frequency at which the interference waves exist and the signal strength of the interference waves are detected.
  • the frequency and signal strength of the interference wave are detected while changing the receiving frequency band sequentially from the frequency A side to the frequency B side.
  • interference wave A with signal strength P1 is detected, and when searching with frequency B, interference wave B with signal strength P1 is detected.
  • searching with frequency C an interference wave C with signal strength P2 is detected, and when searching with frequency F, interference wave F with signal strength P2 is detected.
  • the interference waves that affect the terminal 11 are recognized as interference waves as a result of the interference wave search when the signal strength is "-60db" or higher. They become wave A and interference wave B. In order to detect such interference waves, information on the interference waves is acquired in step S13.
  • interference wave information table includes the interference wave frequency (Frf), the difference (Fud) when the desired wave frequency is subtracted from the interference wave frequency, and the interference signal. This is a table in which the intensity (Pud) of (detected signal) is associated.
  • the table shown in FIG. 9 assumes that the frequency of the desired wave is 921 MHz.
  • step S13 when the interference wave information table as shown in FIG. 9 is created, the process proceeds to step S14.
  • step S14 third-order intermodulation distortion (IM3) for each frequency combination is calculated from the interference wave information.
  • IM3 third-order intermodulation distortion
  • IM3 may occur due to the nonlinearity of the nonlinear circuit.
  • the nonlinear circuit outputs two signals having frequencies 2f1-f2 and 2f2-f1, in addition to the two basic signals having frequencies f1 and f2.
  • IM3 third-order intermodulation distortion
  • the modulated wave E which is IM3
  • the modulated wave E which is IM3
  • Basic signals with two adjacent frequencies f1 and f2 are input to a nonlinear circuit, and the output basic signals (signals with frequencies f1 and f2) and the frequency are calculated with respect to the input signal level (Pin) of the input basic signals.
  • the output basic signals (signals with frequencies f1 and f2) and the frequency are calculated with respect to the input signal level (Pin) of the input basic signals.
  • the output signal level of the basic signal is very high compared to the level of IM3.
  • the level of IM3 increases by 3 dB for every 1 dB increase in the output signal level of the fundamental signal, so the input signal level ( It can be seen that in the region where Pin) is high, the output signal level of the basic signal and the level of IM3 become close, and the influence of IM3 on the basic signal becomes large.
  • the input signal level at is called the third order input intercept point (Third Order Input Intercept Point: IIP3).
  • IIP3 indicates the device characteristics (linearity) of the nonlinear circuit, and further changes depending on various parameters such as the frequency of the input signal, the power supply voltage applied to the nonlinear circuit, and the ambient temperature during operation.
  • IM3 is calculated from the value of IIP3 and Pud (strength of interference wave in FIG. 9) using the following equation (1).
  • IM3 IIP3+2 ⁇ (Pub1-IIP3)+(Pub2-IIP3)...(1)
  • FIG. 11 shows a table in which the value of IM3 calculated based on formula (1) and the calculation formula are added to the interference wave information table shown in FIG.
  • the part surrounded by the bold square in FIG. 11 is the part added to the interference wave information table.
  • IM3 with FRF of 920.2 is “-114”, and the calculation formula at that time is “-15+2 ⁇ (-42-(-15))+(-60-(-15))”.
  • IM3 where FRF is 920.2 is the value for the combination of an interference wave with a frequency of 920.2MHz and an interference wave with a frequency of 920MHz. If the value listed in Pub is “ ⁇ -60”, “-60” is assigned.
  • IM3 with FRF of 920.4 is “-124”, and the calculation formula at that time is “-15+2 ⁇ (-47-(-15))+(-60-(-15))”.
  • IM3 where FRF is 920.4 is the value for the combination of an interference wave with a frequency of 920.4MHz and an interference wave with a frequency of 920MHz.
  • step S14 (FIG. 6), IM3 is calculated for each combination of frequencies of interference wave candidates listed in the interference wave information table. Note that the table shown in Figure 11 is for illustration purposes only, and the table itself does not need to include the calculation formula for IM3. It can also be configured so that the following processes are executed.
  • step S15 the combination of frequencies (Fud1, Fud2) that results in the highest IM3 is specified.
  • the IM3 with the largest value is "-100”
  • step S16 the values of the level Pud1 and the level Pud2 of the interference waves in Fud1 and Fud2 are input into the reception characteristic table, and IM3 in each VAGC is calculated.
  • the level Pud1 -44 dBm
  • the level Pud2 -42 dBm
  • the value of IIP3 obtained from the receiver performance table shown in Figure 7. is substituted into equation (1) to calculate IM3 due to the detected interference wave.
  • FIG. 12 shows a table in which IM3 (dBm) calculated from information on two detected interference waves is added to the receiver performance table.
  • IM3 sensitivity determined by NF (noise figure)
  • Sense(IM3) sensitivity determined by IM3 (distortion)
  • Sense(IM3) sensitivity determined by IM3 (distortion)
  • Sense(NF) is calculated using the following equation (2)
  • Sense(IM3) is calculated using the following equation (3).
  • Sense(NF) -144+NFdsb-5...(2)
  • Sense(IM3) IM3-30...(3)
  • Sense(NF) is written as -99.89
  • Sense(IM3) is written as -158.69.
  • Sense(NF), IM3, and Sense(IM3) are calculated for each VAGC and written in the receiver characteristic table.
  • step S17 in each VAGC, a process of selecting the larger of the value of Sense(NF) and the value of Sense(IM3) is executed.
  • Figure 13 shows the receiver performance table shown in Figure 12 with an additional rectangle indicating the result of the process of selecting the larger of the Sense(NF) value and the Sense(IM3) value. It is a table. In the receiver performance table shown in FIG. 13, the parts surrounded by squares indicate the selected values.
  • Sense is selected for VAGC from -30 to 15, and Sense (IM3) is selected for VAGC 18 and 21.
  • step S18 the gain (VAGC) of the low-noise amplifier circuit 22 that has the lowest sensitivity on the receiver performance table is specified.
  • step S17 the gain of the low noise amplifier circuit 22 at which the selected value switches from the value of Sense(NF) to the value of Sense(IM3) is changed to the gain of the low noise amplifier circuit 22 specified in step S18 ( VAGC).
  • Sense(NF) is -141.508 dBm, which is the lowest, that is, a good value.
  • FIG. 14 is a graph showing changes in GAIN, NFdsb, and IIP3 when the gain (VAGC) of the low-noise amplifier circuit 22 is changed.
  • FIG. 14 is a graph of the receiver performance table shown in FIG. 7, for example.
  • the horizontal axis of the graph shown in FIG. 14 represents the gain (LNA Gain) of the low noise amplifier circuit 22, and the vertical axis represents dB. It can be seen that as the gain (VAGC) of the low-noise amplifier circuit 22 is lowered (as it goes to the right in the graph), the value of the noise figure (NFdsb) becomes smaller. The smaller the value of the noise figure (NFdsb), the more degraded it is.
  • FIG. 15 is a graph showing the change in sensitivity when the gain of the low-noise amplifier circuit 22 is changed.
  • the horizontal axis of the graph shown in FIG. 15 represents the gain (LNA Gain) of the low noise amplifier circuit 22, and the vertical axis represents the value of Sense (NF) or Sense (IM3).
  • the graph shown in FIG. 15 is a graph at a predetermined Pud (signal strength of interfering wave), and the explanation will be continued here assuming that it is a graph obtained by plotting the graph shown in FIG. 13.
  • the noise figure sensitivity Sense decreases as the gain of the low-noise amplifier circuit 22 decreases (as it moves to the right in the graph), and the sensitivity worsens.
  • the third-order intermodulation distortion sensitivity Sense increases as the gain of the low-noise amplifier circuit 22 decreases (as it moves to the right in the graph), and the sensitivity improves.
  • the gain of the low-noise amplifier circuit 22 corresponding to the intersection of the noise figure sensitivity Sense (NF) and the third-order intermodulation distortion sensitivity Sense (IM3) is the optimal gain, and the interference This is the gain that can most reduce the influence of
  • the search can be performed by performing the processes of step S17 and step S18. That is, the point where the value selected in step S17 switches from the value of Sense(NF) to the value of Sense(IM3) is searched, and the gain of the low noise amplifier circuit 22 at the point of switching is determined as shown in the graph shown in FIG. It becomes an intersection.
  • the gain of the low-noise amplifier circuit 22 is configured to be adjustable in 1 dB increments, the gain corresponding to the intersection can be set, and it may be possible to do so, but as in the example, the gain can be adjusted in 3 dB increments. If so, the gain closest to the intersection and adjustable is set as the gain of the low-noise amplification circuit 22.
  • the gain of the low-noise amplifier circuit 22 set in this way is a gain that can suppress the influence of noise and the influence of third-order intermodulation distortion. In other words, it is the gain of the low-noise amplifier circuit 22 that can best suppress the influence of interference waves, and by setting the gain of the low-noise amplifier circuit 22 to such a gain, the desired signal can be detected while minimizing the influence of interference waves. can be received.
  • the search processing unit 29 searches for interference waves by executing the process shown in the flowchart shown in FIG. 6, and sets the gain of the low-noise amplification circuit 22 that is less susceptible to the interference waves. After the gain of the low-noise amplifier circuit 22 is set to the gain set by the search processing unit 29, the signal (desired wave) from the base station 12 is received. Therefore, desired waves can be received while the influence of interference waves is reduced.
  • the gain of the low-noise amplifier circuit 22 is changed, this change is a process that can be performed only on the terminal 11 side.
  • a gain suitable for the surrounding situation on the terminal 11 side can be set for each terminal 11. Further, settings for reducing the influence of interference waves can be made without performing bidirectional communication with the base station 12.
  • interference waves can be detected, an appropriate gain can be set, and reception can be performed at the set gain. Therefore, intermodulation distortion can be reduced and signal demodulation from the base station becomes possible.
  • the series of processes described above can be executed by hardware or software.
  • the programs that make up the software are installed on the computer.
  • the computer includes a computer built into dedicated hardware and, for example, a general-purpose personal computer that can execute various functions by installing various programs.
  • FIG. 16 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processes using a program.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • An input/output interface 2005 is further connected to the bus 2004.
  • An input section 2006, an output section 2007, a storage section 2008, a communication section 2009, and a drive 2010 are connected to the input/output interface 2005.
  • the input unit 2006 consists of a keyboard, mouse, microphone, etc.
  • the output unit 2007 includes a display, a speaker, and the like.
  • the storage unit 2008 includes a hard disk, nonvolatile memory, and the like.
  • the communication unit 2009 includes a network interface and the like.
  • the drive 2010 drives a removable medium 2011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
  • the CPU 2001 for example, loads the program stored in the storage unit 2008 into the RAM 2003 via the input/output interface 2005 and the bus 2004 and executes the program, thereby executing the above-mentioned series. processing is performed.
  • a program executed by the computer can be provided by being recorded on a removable medium 2011 such as a package medium, for example. Additionally, programs may be provided via wired or wireless transmission media, such as local area networks, the Internet, and digital satellite broadcasts.
  • the program can be installed in the storage unit 2008 via the input/output interface 2005 by attaching the removable medium 2011 to the drive 2010. Further, the program can be received by the communication unit 2009 via a wired or wireless transmission medium and installed in the storage unit 2008. Other programs can be installed in the ROM 2002 or the storage unit 2008 in advance.
  • the program executed by the computer may be a program in which processing is performed chronologically in accordance with the order described in this specification, in parallel, or at necessary timing such as when a call is made. It may also be a program that performs processing.
  • system refers to the entire device configured by a plurality of devices.
  • the present technology can also have the following configuration.
  • a low-noise amplifier into which the received signal is input; a search processing unit that searches for interference waves and sets a gain of the low-noise amplification unit that reduces the influence of the interference waves.
  • a gain at which the sensitivity of the noise figure of the interference wave and the sensitivity of IM3 (Third Inter Modulation distortion) of the interference wave intersect is set as the gain of the low noise amplification section.
  • IIP3 intermodulation distortion intercept point
  • the determined gain is set as the gain of the low-noise amplification section.
  • the receiving device according to (5) above.
  • the receiving device according to any one of (1) to (6), wherein the gain setting by the search processing unit is performed before receiving a signal from a base station.
  • a receiving device includes a low-noise amplification section into which the received signal is input, A reception method, comprising: searching for interference waves, and setting a gain of the low-noise amplification section to reduce the influence of the interference waves.
  • a computer that controls a receiving device including a low-noise amplification section into which the received signal is input, A program for executing processing including the steps of searching for interference waves and setting a gain of the low-noise amplification section to reduce the influence of the interference waves.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
PCT/JP2023/009514 2022-03-30 2023-03-13 受信装置、受信方法、並びにプログラム Ceased WO2023189460A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010068529A (ja) * 1994-12-16 2010-03-25 Qualcomm Inc 受信器の干渉イミュニティを向上させる方法および装置
WO2013046726A1 (ja) * 2011-09-28 2013-04-04 京セラ株式会社 通信装置およびこれを用いた無線中継装置並びに通信制御方法
JP2013168783A (ja) * 2012-02-15 2013-08-29 Alps Electric Co Ltd 放送受信装置
JP2015126365A (ja) * 2013-12-26 2015-07-06 パナソニック株式会社 受信機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010068529A (ja) * 1994-12-16 2010-03-25 Qualcomm Inc 受信器の干渉イミュニティを向上させる方法および装置
WO2013046726A1 (ja) * 2011-09-28 2013-04-04 京セラ株式会社 通信装置およびこれを用いた無線中継装置並びに通信制御方法
JP2013168783A (ja) * 2012-02-15 2013-08-29 Alps Electric Co Ltd 放送受信装置
JP2015126365A (ja) * 2013-12-26 2015-07-06 パナソニック株式会社 受信機

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