Analog front end gain adjustment method, device and system and storage medium

Abstract

The invention relates to an analog front-end gain adjustment method, device and system and a storage medium, and the system comprises a sampling unit and an amplifier unit arranged in front of the sampling unit. The target echo signal output by the amplifier unit is transmitted to the sampling unit, and whether the sampling unit is saturated or not is judged according to the target echo signal received by the sampling unit; and when the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal which enables the sampling unit not to be saturated is output based on the reduced gain value. According to the invention, the problem that the saturation distortion of the echo signal output by the analog front end cannot be avoided is solved, the signal saturation distortion is avoided by optimizing the analog gain of the front end, and the signal-to-noise ratio of the whole link is ensured at the same time.

Description

Technical Field

[0001] The present application relates to the field of ultrasonic imaging technology, and in particular to an analog front-end gain adjustment method, device, system and storage medium. Background Art

[0002] Ultrasound imaging uses ultrasound to scan the human body and visualize the size, structure, and blood flow of organs in the body by receiving and processing reflected signals. Ultrasound waves will be strongly reflected at different tissue interfaces, and will attenuate to varying degrees according to tissue characteristics as they propagate over time, resulting in extremely weak echo signals received from focal points deep inside the body. For this reason, ultrasound equipment needs to set gain compensation to ensure subsequent imaging quality.

[0003] In the existing gain compensation method, the gain compensation parameters corresponding to the current ultrasound image data are calculated according to the selected gain compensation mode, and the calculated gain compensation parameters are used to perform gain compensation on the current ultrasound image data. However, the above method uses the back-end digital gain to adjust the image after the analog-to-digital converter samples, which cannot avoid the saturation distortion of the echo signal output by the analog front end to facilitate the back-end digital signal processing.

[0004] With regard to the problem in related technologies that the saturation distortion of the echo signal output by the analog front end cannot be avoided, no effective solution has been proposed so far. Summary of the invention

[0005] In this embodiment, an analog front-end gain adjustment method, device, system and storage medium are provided to solve the problem that saturation distortion of the echo signal output by the analog front-end cannot be avoided in the related art.

[0006] In a first aspect, an analog front-end gain adjustment method is provided in this embodiment, which is applicable to an analog front-end gain adjustment system; the system includes a sampling unit and an amplifier unit preceding the sampling unit; the method includes:

[0007] Transmitting the target echo signal output by the amplifier unit to the sampling unit, and judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit;

[0008] When the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

[0009] In some embodiments, judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit includes:

[0010] Determine the target echo signal received by the sampling unit; the target echo signal includes a plurality of array element echo signals;

[0011] When the maximum signal value of each of the array element echo signals exceeds a preset input threshold, determining that the sampling unit is saturated; or,

[0012] The ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals is determined, and when the ratio exceeds a preset ratio threshold, it is determined that the sampling unit is saturated.

[0013] In some embodiments, the amplifier unit includes at least a first target amplifier; reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated, comprises:

[0014] When the first gain value of the first target amplifier is not a preset first minimum gain value, the first gain value is reduced according to a first step until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0015] In some embodiments, the amplifier unit further includes a second target amplifier, and the first target amplifier is placed before the second target amplifier; reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated, comprises:

[0016] When the second gain value of the second target amplifier is not a preset second minimum gain value, reducing the second gain value according to a second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated;

[0017] When the second gain value is reduced to the second minimum gain value and the sampling unit is still saturated, the first gain value is reduced according to the first step until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0018] In some embodiments, the system further includes a low noise power amplifier in front of the amplifier unit; after determining whether the sampling unit is saturated according to the target echo signal received by the sampling unit, the method further includes:

[0019] When the sampling unit is saturated and the gain value of the amplifier unit cannot be reduced, the third gain value of the low-noise power amplifier is reduced according to a third step size until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated.

[0020] In some embodiments, after outputting the target echo signal so that the sampling unit is not saturated based on the reduced gain value, the method further includes:

[0021] Based on the target echo signal that makes the sampling unit not saturated, determining a corresponding first original echo signal; the first original echo signal is an input signal of the amplifier unit;

[0022] determining, according to the first original echo signal, whether the amplifier unit is saturated;

[0023] When the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is no longer saturated.

[0024] In some embodiments, the system further comprises a low noise power amplifier preceding the amplifier unit; after reducing the gain value of the amplifier unit until the amplifier unit is not saturated, the method further comprises:

[0025] Based on the target echo signal that makes the sampling unit not saturated, determining a second original echo signal corresponding to the target echo signal; the second original echo signal is an input signal of the low noise power amplifier;

[0026] determining, according to the second original echo signal, whether the low noise power amplifier is saturated;

[0027] When the low noise power amplifier is saturated, the third gain value of the low noise power amplifier is reduced according to a third step length until the low noise power amplifier is no longer saturated.

[0028] In a second aspect, an analog front-end gain adjustment device is provided in this embodiment, which is applicable to an analog front-end gain adjustment system; the system includes a sampling unit and an amplifier unit in front of the sampling unit; the device includes:

[0029] a judgment module, configured to transmit the target echo signal output by the amplifier unit to the sampling unit, and judge whether the sampling unit is saturated according to the target echo signal received by the sampling unit;

[0030] The adjustment module is used to reduce the gain value of the amplifier unit when the sampling unit is saturated, until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

[0031] In a third aspect, an analog front-end gain adjustment system is provided in this embodiment, the system comprising an amplifier unit, a sampling unit and a control unit; wherein the sampling unit is connected to the amplifier unit, and the control unit is connected to the amplifier unit and the sampling unit respectively;

[0032] The amplifier unit is used to amplify the received original echo signal to obtain a corresponding target echo signal;

[0033] The sampling unit is used to convert the target echo signal into a corresponding digital signal;

[0034] The control unit is used to execute the analog front-end gain adjustment method described in the first aspect above.

[0035] In a fourth aspect, a computer device is provided in this embodiment, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the analog front-end gain adjustment method described in the first aspect when executing the computer program.

[0036] In a fourth aspect, a storage medium is provided in this embodiment, on which a computer program is stored, and when the program is executed by a processor, the analog front-end gain adjustment method described in the first aspect is implemented.

[0037] Compared with the related art, the analog front-end gain adjustment method, device, system and storage medium provided in this embodiment, wherein the system includes a sampling unit and an amplifier unit in front of the sampling unit; the target echo signal output by the amplifier unit is transmitted to the sampling unit, and whether the sampling unit is saturated is determined according to the target echo signal received by the sampling unit; when the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated, thereby solving the problem of the saturation distortion of the echo signal output by the analog front end that cannot be avoided, and achieving the avoidance of signal saturation distortion by optimizing the front-end analog gain while ensuring the signal-to-noise ratio of the entire link.

[0038] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0040] Figure 1 It is a hardware structure block diagram of a terminal device of an analog front-end gain adjustment method provided in an embodiment of the present application;

[0041] Figure 2 is a flow chart of an analog front-end gain adjustment method provided by an embodiment of the present application;

[0042] Figure 3 is a structural schematic diagram of an amplifier unit provided in an embodiment of the present application;

[0043] Figure 4 is a structural schematic diagram of an amplifier unit provided in another embodiment of the present application;

[0044] Figure 5 It is a flowchart of an analog front-end gain adjustment method provided by an embodiment of the present application;

[0045] Figure 6 is a flow chart of an analog front-end gain adjustment method provided by another embodiment of the present application;

[0046] Figure 7 is a flow chart of an analog front-end gain adjustment method provided by a preferred embodiment of the present application;

[0047] Figure 8 is a structural block diagram of an analog front-end gain adjustment device provided in one embodiment of the present application;

[0048] Fig. 9 It is a structural block diagram of an analog front-end gain adjustment system provided in one embodiment of the present application.

[0049] In the figure: 102, processor; 104, memory; 106, transmission device; 108, input and output device; 10, judgment module; 20, adjustment module; 100, amplifier unit; 110, time gain compensation amplifier; 120, programmable gain amplifier; 200, sampling unit; 300, control unit; 400, storage unit; 500, low noise power amplifier. DETAILED DESCRIPTION

[0050] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0051] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0052] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Figure 1 FIG. 1 is a hardware structure diagram of a terminal of the analog front-end gain adjustment method of this embodiment. Figure 1 As shown, the terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data, wherein processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0053] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the analog front-end gain adjustment method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0054] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0055] In this embodiment, a method for adjusting the gain of an analog front end is provided. Figure 2 is a flow chart of the analog front-end gain adjustment method of this embodiment. Figure 2 As shown, the process includes the following steps:

[0056] Step S210, transmitting the target echo signal output by the amplifier unit to the sampling unit, and judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit;

[0057] Step S220 , when the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

[0058] It should be noted that the ultrasonic imaging system usually uses an analog front end to process the ultrasonic echo signal. The analog front end includes a sampling unit and multiple target amplifiers in front of the sampling unit. Each target amplifier is used to amplify the received echo signal. The sampling unit is used to convert the amplified echo signal into a corresponding digital signal to facilitate the back-end digital signal processing to obtain the final image. Among them, the sampling unit can use an analog to digital converter (ADC) and the like, and the target amplifier includes but is not limited to a low noise power amplifier (LNA), a time gain compensation amplifier (TGC) and a programmable gain amplifier (PGA).

[0059] Specifically, after the original echo signal is processed by each target amplifier, a target echo signal is obtained, which is the input signal of the sampling unit, and the target echo signal includes multiple array element echo signals. According to the target echo signal collected by the sampling unit, it is determined whether the sampling unit is saturated. Among them, it is determined whether the maximum signal value of each array element echo signal exceeds the preset input threshold. If the maximum signal value of each array element echo signal exceeds the preset input threshold, it is determined that the sampling unit is saturated; or, the ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals is calculated, and it is determined whether the ratio exceeds the preset ratio threshold. If the calculated ratio exceeds the preset ratio threshold, it is determined whether the sampling unit is saturated.

[0060] When it is detected that the sampling unit is saturated, the gain value of the amplifier unit in front of the sampling unit is reduced in advance until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated, that is, a target echo signal output based on the adjusted gain value is not saturated in the sampling unit, thereby achieving preliminary optimization of the front-end analog gain and maximizing the utilization of the dynamic range of the sampling unit.

[0061] Wherein, when the amplifier unit includes a first target amplifier, it is determined whether the first gain value of the first target amplifier is a preset first minimum gain value. When the first gain value of the first target amplifier is not the preset first minimum gain value, the first gain value is reduced according to the first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated. Or, when the amplifier unit includes a first target amplifier and a second target amplifier, and the first target amplifier is placed before the second target amplifier, it is determined whether the second gain value of the second target amplifier is a preset second minimum gain value. When the second gain value of the second target amplifier is not the preset second minimum gain value, the second gain value is reduced according to the second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated. If the second gain value is reduced to the second minimum gain value, but the sampling unit is still saturated, the first gain value is reduced according to the first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated. It should be noted that this embodiment does not limit the type of amplifier in the amplifier unit, and the optional amplifiers include but are not limited to programmable gain amplifiers and time gain compensation amplifiers.

[0062] After outputting the target echo signal that makes the sampling unit not saturated, based on the target echo signal that makes the sampling unit not saturated, the corresponding first original echo signal is calculated, and whether the amplifier unit is saturated is determined according to the first original echo signal. When the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is not saturated. Further, based on the target echo signal that makes the sampling unit not saturated, the second original echo signal corresponding to the target echo signal is calculated, and whether the low-noise power amplifier is saturated is determined according to the second original echo signal. When the low-noise power amplifier is saturated, the third gain value of the low-noise power amplifier is reduced according to the third step until the low-noise power amplifier is not saturated, so as to gradually adjust the gain value of each link from the back end of the link to the front, so that the signal range of each stage is slightly lower than the input range of the next stage, and the signal saturation distortion is prevented while the signal is fully amplified, thereby ensuring the signal-to-noise ratio of the entire link. Among them, the principle of judging whether the amplifier unit or the low-noise power amplifier is saturated is the same as that of judging whether the sampling unit is saturated, which will not be repeated here.

[0063] In the existing gain compensation method, the gain compensation parameters corresponding to the current ultrasound image data are calculated according to the selected gain compensation mode, and the calculated gain compensation parameters are used to perform gain compensation on the current ultrasound image data. However, the above method uses the back-end digital gain to adjust the image after the analog-to-digital converter samples, which cannot avoid the saturation distortion of the echo signal output by the analog front end to facilitate the back-end digital signal processing.

[0064] Compared with the prior art, the present application transmits the target echo signal output by the amplifier unit to the sampling unit, and determines whether the sampling unit is saturated according to the target echo signal received by the sampling unit; when the sampling unit is saturated, the gain value of the amplifier unit is reduced until the target echo signal that does not saturate the sampling unit is output based on the reduced gain value. Based on this, by gradually adjusting the gain value of each link from the back end of the link to the front end, the target echo signal that does not saturate the sampling unit is output, which solves the problem of the echo signal saturation distortion output by the analog front end that cannot be avoided, and achieves the avoidance of signal saturation distortion by optimizing the front end analog gain, while ensuring the signal-to-noise ratio of the entire link.

[0065] In some embodiments, judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit in step S210 includes the following steps:

[0066] Step S211, determining a target echo signal received by a sampling unit; the target echo signal includes a plurality of array element echo signals;

[0067] Step S212, when the maximum signal value of each element echo signal exceeds a preset input threshold, it is determined that the sampling unit is saturated; or,

[0068] Step S213, determining the ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals, and determining that the sampling unit is saturated when the ratio exceeds a preset ratio threshold.

[0069] Specifically, the target echo signal collected by the sampling unit includes multiple array element echo signals, and it is determined whether the maximum signal value of each array element echo signal exceeds a preset input threshold or a certain proportion of the input threshold, such as 80% of the input threshold. If the maximum signal value of each array element echo signal exceeds the input threshold or a certain proportion of the input threshold, it is determined that the sampling unit is saturated.

[0070] In addition, a statistical method can be used to analyze whether the sampling unit is saturated, and the ratio of the number of element echo signals whose maximum signal value exceeds the input threshold to the number of all element echo signals is calculated. It is determined whether the ratio exceeds a preset ratio threshold, and if the ratio exceeds the preset ratio threshold, it is determined that the sampling unit is saturated.

[0071] Through this embodiment, a target echo signal received by a sampling unit is determined, and the target echo signal includes a plurality of array element echo signals; when the maximum signal value of each array element echo signal exceeds a preset input threshold, it is determined that the sampling unit is saturated, or the ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals is determined, and when the ratio exceeds a preset ratio threshold, it is determined that the sampling unit is saturated, thereby improving the accuracy of analyzing whether the sampling unit is saturated.

[0072] In some embodiments, the amplifier unit includes at least a first target amplifier; and reducing the gain value of the amplifier unit in step S220 until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated comprises the following steps:

[0073] When the first gain value of the first target amplifier is not a preset first minimum gain value, the first gain value is reduced according to the first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0074] Specifically, determine whether the first gain value of the first target amplifier is a preset first minimum gain value. When the first gain value of the first target amplifier is not the preset first minimum gain value, reduce the first gain value according to the first step until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0075] like Figure 3 As shown, taking the use of a time gain compensation amplifier as the first target amplifier as an example, when it is detected that the first gain value of the time gain compensation amplifier is not a preset first minimum gain value, it indicates that the gain value of the time gain compensation amplifier can be reduced, and the first gain value is reduced according to a preset first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0076] Through this embodiment, when the first gain value of the first target amplifier is not the preset first minimum gain value, the first gain value is reduced according to the first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated, thereby avoiding signal saturation distortion.

[0077] In some embodiments, the amplifier unit further includes a second target amplifier, and the first target amplifier is placed before the second target amplifier; and reducing the gain value of the amplifier unit in step S220 until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated includes the following steps:

[0078] When the second gain value of the second target amplifier is not the preset second minimum gain value, reducing the second gain value according to the second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated;

[0079] When the second gain value decreases to the second minimum gain value and the sampling unit is still saturated, the first gain value is decreased according to the first step until a target echo signal is output based on the decreased first gain value so that the sampling unit is not saturated.

[0080] Specifically, it is determined whether the second gain value of the second target amplifier is a preset second minimum gain value. When the second gain value of the second target amplifier is not the preset second minimum gain value, the second gain value is reduced according to the second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated. In addition, if the second gain value is reduced to the second minimum gain value, but the sampling unit is still saturated, the first gain value is reduced according to the first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0081] For example, Figure 4 As shown, the amplifier unit includes a time gain compensation amplifier and a programmable gain amplifier connected in sequence. When the sampling unit is saturated, it is determined whether the second gain value of the programmable gain amplifier is a preset second minimum gain value. If the second gain value of the programmable gain amplifier is not the second minimum gain value, the second gain value of the programmable gain amplifier is reduced according to a preset second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated; if the second gain value of the programmable gain amplifier is reduced to the second minimum gain value and the sampling unit is still saturated, the first gain value of the time gain compensation amplifier is reduced according to a preset first step length until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0082] Through this embodiment, when the second gain value of the second target amplifier is not the preset second minimum gain value, the second gain value is reduced according to the second step size until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated, and when the second gain value is reduced to the second minimum gain value and the sampling unit is still saturated, the first gain value is reduced according to the first step size until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated, thereby preventing the sampling signal from being saturated and distorted, and at the same time maximizing the use of the dynamic range of the sampling unit.

[0083] In some embodiments, the analog front-end gain adjustment system further includes a low-noise power amplifier in front of the amplifier unit; after determining whether the sampling unit is saturated according to the target echo signal received by the sampling unit, the analog front-end gain adjustment method further includes the following steps:

[0084] When the sampling unit is saturated and the gain value of the amplifier unit cannot be reduced, the third gain value of the low noise power amplifier is reduced according to a third step size until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated.

[0085] Specifically, when the sampling unit is saturated, it is determined whether the gain value of the amplifier unit can be reduced. The amplifier unit may be a combination of multiple amplifiers, for example, the amplifier unit includes a time gain compensation amplifier, or the amplifier unit includes a programmable gain amplifier and a time gain compensation amplifier connected in sequence. It is understandable that when the amplifier unit includes multiple amplifiers, the gain value of each amplifier cannot be reduced, indicating that the gain value of the amplifier unit cannot be reduced.

[0086] Further, when it is detected that the gain value of the amplifier unit cannot be reduced, the third gain value of the low noise power amplifier is reduced according to a preset third step size until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated.

[0087] Through this embodiment, when the sampling unit is saturated and the gain value of the amplifier unit cannot be reduced, the third gain value of the low-noise power amplifier is reduced according to the third step size until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated, thereby avoiding saturation distortion of the sampling signal.

[0088] In some of the embodiments, after outputting the target echo signal so that the sampling unit is not saturated based on the reduced gain value, the following steps are also included:

[0089] Based on the target echo signal that makes the sampling unit not saturated, determining a corresponding first original echo signal; the first original echo signal is an input signal of the amplifier unit;

[0090] determining whether the amplifier unit is saturated according to the first original echo signal;

[0091] When the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is no longer saturated.

[0092] Specifically, after the target echo signal that makes the sampling unit not saturated is output based on the reduced gain value, the corresponding first original echo signal is inferred and calculated based on the target echo signal that makes the sampling unit not saturated, and the first original echo signal is the input signal of the amplifier unit. It can be understood that in this embodiment, in order to output the target echo signal that makes the sampling unit not saturated, the current gain value of the amplifier unit has changed compared with the initial gain value. When calculating the first original echo signal, the current gain values ​​of the amplifier unit are summed to obtain the total gain value, and the ratio of the target echo signal that makes the sampling unit not saturated to the total gain value is calculated to obtain the corresponding first original echo signal.

[0093] Afterwards, it is determined whether the amplifier unit is saturated according to the first original echo signal, and when the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is not saturated. It should be noted that the principle of determining whether the low-noise power amplifier is saturated is the same as that of determining whether the sampling unit is saturated, which will not be described in detail here, and the method for preventing the amplifier unit from being saturated in this embodiment is also applicable to the case where the gain value of the amplifier unit is not adjusted, that is, the sampling unit is not saturated.

[0094] Exemplarily, when the amplifier unit includes a time gain compensation amplifier and a programmable gain amplifier connected in sequence, the preset time gain compensation amplifier does not need to consider the saturation problem, and the specific calculation formula of the first original echo signal is as follows:

[0095] S1=S1′ / M1 (1)

[0096] In formula (1), S1 represents the first original echo signal; S1′ represents the target echo signal that makes the sampling unit not saturated; M1 represents the current gain value of the programmable gain amplifier. At this time, according to the first original echo signal, it is determined whether the programmable gain amplifier is saturated, and when the amplifier unit is saturated, the gain value of the programmable gain amplifier is reduced. The gain value of the programmable gain amplifier is reduced according to the preset minimum step size, or the amount to be adjusted of the programmable gain amplifier is determined according to the current input range of the first original echo signal and the maximum input range allowed by the programmable gain amplifier, and the gain value of the programmable gain amplifier is reduced according to the amount to be adjusted.

[0097] Through this embodiment, based on the target echo signal that prevents the sampling unit from being saturated, the corresponding first original echo signal is determined, and based on the first original echo signal, it is determined whether the amplifier unit is saturated. When the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is not saturated. On the basis that the sampling unit is not saturated, it is further ensured that the amplifier unit is not saturated, and the gain value of each link is gradually adjusted from the back end of the link to the front, so that the signal range of each stage is slightly lower than the input range of the next stage. While fully amplifying the signal, signal saturation distortion is prevented, thereby ensuring the signal-to-noise ratio of the entire link.

[0098] In some embodiments, the analog front-end gain adjustment system further includes a low-noise power amplifier in front of the amplifier unit; after reducing the gain value of the amplifier unit until the amplifier unit is not saturated, the analog front-end gain adjustment method further includes the following steps:

[0099] Based on the target echo signal that does not cause saturation in the sampling unit, determine a second original echo signal corresponding to the target echo signal; the second original echo signal is an input signal of the low noise power amplifier;

[0100] determining, according to the second original echo signal, whether the low noise power amplifier is saturated;

[0101] When the low noise power amplifier is saturated, the third gain value of the low noise power amplifier is reduced according to a third step length until the low noise power amplifier is no longer saturated.

[0102] Specifically, when the amplifier unit is not saturated, the current gain values ​​of the low-noise power amplifier and the amplifier unit are summed to obtain a total gain value, and the ratio of the target echo signal that makes the sampling unit not saturated to the total gain value is calculated to obtain a corresponding second original echo signal, which is the input signal of the low-noise power amplifier.

[0103] Exemplarily, when the system includes a low-noise power amplifier, a time gain compensation amplifier, a programmable gain amplifier, and a sampling unit connected in sequence, the specific calculation formula of the second original echo signal is as follows:

[0104] S2=S2′ / M2 (2)

[0105] In formula (2), S2 represents the second original echo signal; S2′ represents the target echo signal that prevents the sampling unit from being saturated; and M2 represents the total gain value of the low noise power amplifier, the time gain compensation amplifier, and the programmable gain amplifier.

[0106] Further, according to the second original echo signal, it is determined whether the low noise power amplifier is saturated, and when the low noise power amplifier is saturated, the third gain value of the low noise power amplifier is reduced according to the third step size until the low noise power amplifier is not saturated. The principle of determining whether the low noise power amplifier is saturated is the same as that of determining whether the sampling unit is saturated, which will not be repeated here.

[0107] It should be noted that, when the amplifier unit does not need to consider the saturation problem, the second original echo signal corresponding to the target echo signal can be directly calculated to determine whether the low-noise power amplifier is saturated.

[0108] In this embodiment, in addition to reducing the third gain value of the low noise power amplifier according to the third step size, the amount to be adjusted of the low noise power amplifier can be determined according to the current input range and the preset maximum input range corresponding to the second original echo signal, and the third gain value of the low noise power amplifier can be reduced according to the amount to be adjusted. For example, if the amount to be adjusted is calculated to be G times, the second gain value of the low noise power amplifier is reduced by G times. The specific calculation formula of the amount to be adjusted is as follows:

[0109] G=S / S0 (3)

[0110] In formula (3), G represents the amount to be adjusted of the low noise power amplifier; S represents the maximum input range allowed by the second original echo signal; and S0 represents the current input range of the second original echo signal.

[0111] Through this embodiment, based on the target echo signal that makes the sampling unit not saturated, the corresponding second original echo signal is determined, and according to the second original echo signal, it is judged whether the low noise power amplifier is saturated, and when the low noise power amplifier is saturated, the third gain value of the low noise power amplifier is reduced according to the third step size until the low noise power amplifier is not saturated. In this way, on the basis that the sampling unit is not saturated, it is further ensured that the low noise power amplifier is not saturated, and the gain value of each link is gradually adjusted from the back end of the link to the front, so that the signal range of each stage is slightly lower than the input range of the next stage, and while the signal is fully amplified, the signal saturation distortion is prevented, thereby ensuring the signal-to-noise ratio of the entire link.

[0112] The present embodiment is described and illustrated by means of specific examples below.

[0113] Figure 5 is a flow chart of the analog front-end gain adjustment method of this embodiment, such as Figure 5 As shown, each amplifier combination is a low-noise power amplifier and a time gain compensation amplifier connected in sequence, and the specific process of the gain adjustment method includes the following steps:

[0114] The target echo data is collected by the ADC S510, and it is determined whether the ADC is saturated according to the target echo data S520. When the ADC is saturated, it is determined whether the first gain value of the TGC is the preset minimum gain value, that is, whether the TGC gain can be reduced S530. If the first gain value of the TGC is the minimum gain value, the first gain value of the LNA is reduced S540, and the process jumps to step S510; if the first gain value of the TGC is not the minimum gain value, indicating that the TGC gain can be reduced, the first gain value of the TGC is reduced S550, and the process jumps to step S510.

[0115] When the ADC is not saturated, the input signal of the LNA is calculated by inference S560, and based on the calculated input signal, it is determined whether the LNA is saturated S570. If the LNA is saturated, the process jumps to step S550; if the LNA is not saturated, the adjusted gain values ​​of each amplifier are applied S580.

[0116] Figure 6 is a flow chart of the analog front-end gain adjustment method of this embodiment, such as Figure 6 As shown, each amplifier combination is a low-noise power amplifier, a time gain compensation amplifier and a programmable gain amplifier connected in sequence. The specific process of the gain adjustment method includes the following steps:

[0117] The target echo data is collected by the ADC S601, and it is determined whether the ADC is saturated according to the target echo data S602. When the ADC is saturated, it is determined whether the first gain value of the PGA is the preset first minimum gain value, that is, whether the PGA gain can be reduced S603. If the first gain value of the PGA is not the first minimum gain value, indicating that the PGA gain can be reduced, the first gain value of the PGA is reduced S604, and the process jumps to step S601; if the first gain value of the PGA is the first minimum gain value, it is determined whether the first gain value of the TGC is the preset second minimum gain value, that is, whether the TGC gain can be reduced S605, and the process jumps to step S601.

[0118] Further, when the first gain value of TGC is the second minimum gain value, the first gain value of LNA is reduced S606, and the process jumps to step S601; when the first gain value of TGC is not the second minimum gain value, it indicates that the TGC gain can be reduced, the first gain value of TGC is reduced S607, and the process jumps to step S601.

[0119] When the ADC is not saturated, the input signal of the PGA is calculated by inference S608, and based on the calculated input signal of the PGA, it is determined whether the PGA is saturated S609. If the PGA is saturated, the process jumps to step S603; if the PGA is not saturated, the input signal of the LNA is calculated by inference S610, and based on the calculated input signal of the LNA, it is determined whether the LNA is saturated S611. If the LNA is saturated, the process jumps to step S606; if the LNA is not saturated, the adjusted gain values ​​of each amplifier are applied S612.

[0120] The present embodiment is described and illustrated below through preferred embodiments.

[0121] Figure 7 is a flow chart of the analog front-end gain adjustment method of the preferred embodiment. Figure 7 As shown, the analog front-end gain adjustment method includes the following steps:

[0122] Step S710, transmitting the target echo signal output by the amplifier unit to the sampling unit; the target echo signal includes a plurality of array element echo signals;

[0123] Step S720, determining the ratio of the number of array element echo signals whose maximum signal value does not exceed the input threshold to the number of all array element echo signals; when the ratio exceeds a preset ratio threshold, determining that the sampling unit is saturated;

[0124] Step S730, when the sampling unit is saturated, reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated;

[0125] Step S740, determining a corresponding first original echo signal based on the target echo signal that causes the sampling unit to not be saturated; the first original echo signal is an input signal of the amplifier unit;

[0126] Step S750: judging whether the amplifier unit is saturated according to the first original echo signal; when the amplifier unit is saturated, reducing the gain value of the amplifier unit until the amplifier unit is not saturated.

[0127] Step S760, based on the target echo signal that does not cause saturation in the sampling unit, determining a second original echo signal corresponding to the target echo signal; the second original echo signal is an input signal of the low noise power amplifier;

[0128] Step S770, judging whether the low noise power amplifier is saturated according to the second original echo signal; when the low noise power amplifier is saturated, reducing the third gain value of the low noise power amplifier according to the third step size until the low noise power amplifier is not saturated.

[0129] Through this embodiment, the target echo signal output by the amplifier unit is transmitted to the sampling unit, and the target echo signal includes multiple array element echo signals. The ratio of the number of array element echo signals whose maximum signal value does not exceed the input threshold to the number of all array element echo signals is determined. When the ratio exceeds the preset ratio threshold, it is determined that the sampling unit is saturated, and the gain value of the amplifier unit is reduced until the target echo signal that does not saturate the sampling unit is output based on the reduced gain value, which solves the problem that the saturation distortion of the echo signal output by the analog front end cannot be avoided, and realizes avoiding the signal saturation distortion by optimizing the front-end analog gain.

[0130] Afterwards, based on the target echo signal that prevents the sampling unit from being saturated, the corresponding first original echo signal is determined, and according to the first original echo signal, whether the amplifier unit is saturated is judged; when the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is not saturated, and then based on the target echo signal that prevents the sampling unit from being saturated, the second original echo signal corresponding to the target echo signal is determined, and according to the second original echo signal, whether the low-noise power amplifier is saturated is judged, and when the low-noise power amplifier is saturated, the third gain value of the low-noise power amplifier is reduced according to the third step size until the low-noise power amplifier is not saturated, so as to gradually adjust the gain value of each link from the back end of the link to the front, so that the signal range of each stage is slightly lower than the input range of the next stage, and while fully amplifying the signal, preventing signal saturation distortion, thereby ensuring the signal-to-noise ratio of the entire link.

[0131] It should be noted that the steps shown in the above process or the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0132] In this embodiment, an analog front-end gain adjustment device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. The terms "module", "unit", "subunit", etc. used below can implement a combination of software and / or hardware of predetermined functions. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0133] Figure 8 : is a structural block diagram of the analog front-end gain adjustment device of this embodiment, such as Figure 8 As shown, the device comprises:

[0134] A judgment module 10 is used to transmit the target echo signal output by the amplifier unit to the sampling unit, and judge whether the sampling unit is saturated according to the target echo signal received by the sampling unit;

[0135] The adjustment module 20 is used to reduce the gain value of the amplifier unit when the sampling unit is saturated, until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

[0136] Through the device provided in this embodiment, the target echo signal output by the amplifier unit is transmitted to the sampling unit, and whether the sampling unit is saturated is determined based on the target echo signal received by the sampling unit; when the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated, thereby solving the problem of unavoidable saturation distortion of the echo signal output by the analog front end, and achieving the goal of avoiding signal saturation distortion by optimizing the front-end analog gain while ensuring the signal-to-noise ratio of the entire link.

[0137] In some of the embodiments, the judgment module 10 is further used to determine a target echo signal received by the sampling unit; the target echo signal includes a plurality of array element echo signals; when the maximum signal value of each array element echo signal exceeds a preset input threshold, it is determined that the sampling unit is saturated; or, the ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals is determined, and when the ratio exceeds a preset ratio threshold, it is determined that the sampling unit is saturated.

[0138] In some of the embodiments, the adjustment module 20 is further used to reduce the first gain value according to the first step length when the first gain value of the first target amplifier is not a preset first minimum gain value, until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0139] In some of the embodiments, the adjustment module 20 is further used to reduce the second gain value according to a second step size when the second gain value of the second target amplifier is not a preset second minimum gain value, until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated; and when the second gain value is reduced to the second minimum gain value and the sampling unit is still saturated, reduce the first gain value according to the first step size until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

[0140] In some of the embodiments, the adjustment module 20 is also used to reduce the third gain value of the low-noise power amplifier according to a third step size when the sampling unit is saturated and the gain value of the amplifier unit cannot be reduced, until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated.

[0141] In some of the embodiments, the adjustment module 20 is also used to determine a corresponding first original echo signal based on a target echo signal that prevents the sampling unit from being saturated; the first original echo signal is an input signal of the amplifier unit; based on the first original echo signal, it is determined whether the amplifier unit is saturated; when the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is not saturated.

[0142] In some of the embodiments, the adjustment module 20 is also used to determine a second original echo signal corresponding to the target echo signal based on the target echo signal that prevents the sampling unit from being saturated; the second original echo signal is an input signal of the low-noise power amplifier; based on the second original echo signal, determine whether the low-noise power amplifier is saturated; when the low-noise power amplifier is saturated, reduce the third gain value of the low-noise power amplifier according to a third step size until the low-noise power amplifier is not saturated.

[0143] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0144] In this embodiment, an analog front-end gain adjustment system is also provided. Fig. 9 As shown, the system includes an amplifier unit 100, a sampling unit 200 and a control unit 300; wherein the sampling unit 200 is connected to the amplifier unit 100, and the control unit 300 is connected to the amplifier unit 100 and the sampling unit 200 respectively;

[0145] The amplifier unit 100 is used to amplify the received original echo signal to obtain a corresponding target echo signal;

[0146] The sampling unit 200 is used to convert the target echo signal into a corresponding digital signal;

[0147] The control unit 300 is used to execute the steps in any of the above method embodiments.

[0148] In some of the embodiments, the system further includes a storage unit 400 , which is used to store the digital signal processed and output by the sampling unit 200 .

[0149] In some of the embodiments, the amplifier unit 100 includes a time gain compensation amplifier 110 .

[0150] In some embodiments, the amplifier unit 100 includes a time gain compensation amplifier 110 and a programmable gain amplifier 120 connected in sequence.

[0151] In some of the embodiments, the system further includes a low noise power amplifier 500 .

[0152] Optionally, in this embodiment, the control unit may be configured to execute the following steps through a computer program:

[0153] S1, transmitting the target echo signal output by the amplifier unit to the sampling unit, and judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit;

[0154] S2, when the sampling unit is saturated, reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

[0155] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0156] In addition, in combination with the analog front-end gain adjustment method provided in the above embodiments, a storage medium can also be provided in this embodiment to implement the method. The storage medium stores a computer program; when the computer program is executed by a processor, any analog front-end gain adjustment method in the above embodiments is implemented.

[0157] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0158] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0159] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0160] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. An analog front-end gain adjustment method, characterized in that: Applicable to an analog front-end gain adjustment system; the system comprises a sampling unit and an amplifier unit preceding the sampling unit; the method comprises: Transmitting the target echo signal output by the amplifier unit to the sampling unit, and judging whether the sampling unit is saturated according to the target echo signal received by the sampling unit; When the sampling unit is saturated, the gain value of the amplifier unit is reduced until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

2. The analog front-end gain adjustment method according to claim 1, characterized in that: The step of judging whether saturation occurs in the sampling unit according to the target echo signal received by the sampling unit includes: Determine the target echo signal received by the sampling unit; the target echo signal includes a plurality of array element echo signals; When the maximum signal value of each of the array element echo signals exceeds a preset input threshold, determining that the sampling unit is saturated; or, The ratio of the number of array element echo signals whose maximum signal value exceeds the input threshold to the number of all array element echo signals is determined, and when the ratio exceeds a preset ratio threshold, it is determined that the sampling unit is saturated.

3. The analog front-end gain adjustment method according to claim 1, characterized in that: The amplifier unit includes at least a first target amplifier; the step of reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated comprises: When the first gain value of the first target amplifier is not a preset first minimum gain value, the first gain value is reduced according to a first step until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

4. The analog front-end gain adjustment method according to claim 3, characterized in that: The amplifier unit further includes a second target amplifier, and the first target amplifier is placed before the second target amplifier; the step of reducing the gain value of the amplifier unit until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated comprises: When the second gain value of the second target amplifier is not a preset second minimum gain value, reducing the second gain value according to a second step length until a target echo signal is output based on the reduced second gain value so that the sampling unit is not saturated; When the second gain value is reduced to the second minimum gain value and the sampling unit is still saturated, the first gain value is reduced according to the first step until a target echo signal is output based on the reduced first gain value so that the sampling unit is not saturated.

5. The analog front-end gain adjustment method according to claim 1, characterized in that: The system further includes a low noise power amplifier in front of the amplifier unit; after determining whether the sampling unit is saturated according to the target echo signal received by the sampling unit, the method further includes: When the sampling unit is saturated and the gain value of the amplifier unit cannot be reduced, the third gain value of the low-noise power amplifier is reduced according to a third step size until a target echo signal is output based on the reduced third gain value so that the sampling unit is not saturated.

6. The analog front-end gain adjustment method according to any one of claims 1 to 5, characterized in that: After outputting the target echo signal so that the sampling unit is not saturated based on the reduced gain value, the method further includes: Based on the target echo signal that makes the sampling unit not saturated, determining a corresponding first original echo signal; the first original echo signal is an input signal of the amplifier unit; determining, according to the first original echo signal, whether the amplifier unit is saturated; When the amplifier unit is saturated, the gain value of the amplifier unit is reduced until the amplifier unit is no longer saturated.

7. The analog front-end gain adjustment method according to claim 6, characterized in that: The system further includes a low noise power amplifier in front of the amplifier unit; after reducing the gain value of the amplifier unit until the amplifier unit is not saturated, the method further includes: Based on the target echo signal that makes the sampling unit not saturated, determining a second original echo signal corresponding to the target echo signal; the second original echo signal is an input signal of the low noise power amplifier; determining, according to the second original echo signal, whether the low noise power amplifier is saturated; When the low noise power amplifier is saturated, the third gain value of the low noise power amplifier is reduced according to a third step length until the low noise power amplifier is no longer saturated.

8. An analog front-end gain adjustment device, characterized in that: Applicable to an analog front-end gain adjustment system; the system comprises a sampling unit and an amplifier unit placed before the sampling unit; the device comprises: a judgment module, configured to transmit the target echo signal output by the amplifier unit to the sampling unit, and judge whether the sampling unit is saturated according to the target echo signal received by the sampling unit; The adjustment module is used to reduce the gain value of the amplifier unit when the sampling unit is saturated, until a target echo signal is output based on the reduced gain value so that the sampling unit is not saturated.

9. An analog front-end gain adjustment system, characterized in that: The system comprises an amplifier unit, a sampling unit and a control unit; wherein the sampling unit is connected to the amplifier unit, and the control unit is connected to the amplifier unit and the sampling unit respectively; The amplifier unit is used to amplify the received original echo signal to obtain a corresponding target echo signal; The sampling unit is used to convert the target echo signal into a corresponding digital signal; The control unit is used to execute the analog front-end gain adjustment method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the analog front-end gain adjustment method according to any one of claims 1 to 8 are implemented.

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