A gain interval division method of adaptive ctle in high-speed digital transmission

Abstract

The application provides a gain interval division method of adaptive CTLE in high-speed digital transmission, and relates to the technical field of high-speed digital signal transmission system. The method comprises the following steps: obtaining a first preset tap coefficient of a decision feedback equalizer; determining a first target tap coefficient of a channel impulse response according to the first preset tap coefficient; determining a first threshold, a second threshold and a third threshold of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution; dividing the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold, the second threshold and the third threshold; and adaptively adjusting the gain of CTLE by using the first preset tap coefficient and the multiple intervals. In this way, the adaptive adjustment based on the first preset tap coefficient and the noise power reduces signal distortion and bit error rate, improves the stability of gain convergence, and improves the adaptability of the high-speed digital signal transmission system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-speed digital signal transmission system, and particularly relates to a gain interval division method of adaptive CTLE in high-speed digital transmission. BACKGROUND

[0002] With the vigorous development of information technology, the application range of high-speed digital communication technology in modern society is continuously expanding, and the data transmission rate has rapidly increased from several Gbps to tens of Gbps or even higher. However, with the continuous increase of transmission rate, the signal integrity challenges faced by the signal in the transmission process are increasingly prominent, mainly embodied in channel attenuation, intersymbol interference (ISI) and high-frequency signal distortion. Channel attenuation mainly embodies the attenuation phenomenon of high-frequency signals, which causes the distortion of the received signal; ISI is caused by the mutual interference of signals in the transmission process, which leads to the error of the received signal decision; and high-frequency signal distortion aggravates the distortion degree of the signal. These problems jointly act on the bit error rate of the communication system, limit the transmission distance, and seriously affect the system performance. In order to solve the above problems, equalization technology is widely used in high-speed digital signal transmission system. Common equalization technologies include linear equalizer, continuous time linear equalizer (CTLE) and decision feedback equalizer (DFE). Among them, CTLE is widely used in high-speed digital communication system due to its simple structure and easy implementation, and is mainly used to compensate for channel frequency response distortion. CTLE can enhance high-frequency signal components by adjusting the gain, thereby effectively alleviating the influence of channel loss. DFE uses a feedback mechanism to effectively compensate for the influence of ISI. DFE uses the feedback of the already judged signal to effectively eliminate the interference between the front and rear code elements, thereby improving the signal quality.

[0003] At present, CTLE with fixed gain and single threshold adjustment gain are usually used. However, the CTLE with fixed gain does not have dynamic adjustment capability, and the fixed gain setting may not provide the best equalization effect in different channel environments, thereby causing signal distortion and bit error rate rising; the use of single threshold to adjust the gain makes the adjustment of CTLE gain lack of precision, which may make the convergence of gain unstable in some cases; due to the simple adjustment mechanism, the convergence speed of CTLE gain may be slow, which makes it difficult to adapt to the dynamic changes of the channel in time, and the adaptability of the high-speed digital signal transmission system is poor. SUMMARY

[0004] The embodiment of the application aims to provide a gain interval division method of adaptive CTLE in high-speed digital transmission, and solve the problems of signal distortion and rising of bit error rate, unstable convergence of gain and poor adaptability of high-speed digital signal transmission system.

[0005] To solve the above technical problems, the embodiment of the application provides the following technical scheme.

[0006] The first aspect of the application provides a gain interval division method of adaptive CTLE in high-speed digital transmission, comprising:

[0007] obtaining a first preset tap coefficient of a decision feedback equalizer;

[0008] determining a first target tap coefficient of a channel impulse response according to the first preset tap coefficient;

[0009] determining a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution;

[0010] dividing the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value;

[0011] adaptively adjusting a CTLE gain by using the first preset tap coefficient and the multiple intervals.

[0012] The second aspect of the application provides a gain interval division device of adaptive CTLE in high-speed digital transmission, comprising:

[0013] a decision feedback equalizer module, configured to generate a first preset tap coefficient of a decision feedback equalizer;

[0014] a threshold value calculation module, configured to determine a first target tap coefficient of a channel impulse response according to the first preset tap coefficient, and determine a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution;

[0015] a division module, configured to divide the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value;

[0016] a CTLE control module, configured to adaptively adjust a CTLE gain by using the first preset tap coefficient and the multiple intervals.

[0017] Compared with the prior art, the application provides a gain interval division method of adaptive CTLE in high-speed digital transmission, a first preset tap coefficient of a decision feedback equalizer is obtained; a first target tap coefficient of a channel impulse response is determined according to the first preset tap coefficient; a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient are determined according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution; the range corresponding to the first preset tap coefficient is divided into multiple intervals by using the first threshold value, the second threshold value and the third threshold value; and the CTLE gain is adaptively adjusted by using the first preset tap coefficient and the multiple intervals. In this way, the first threshold value, the second threshold value and the third threshold value can be adaptively adjusted according to the noise power corresponding to the first preset tap coefficient and the standard deviation of noise, fine and stable gain control is realized, the adaptive adjustment based on the first preset tap coefficient and the noise power makes the division of the range corresponding to the first preset tap coefficient more fine and accurate, so as to reduce signal distortion and bit error rate, improve the stability of gain convergence, effectively cope with burst high noise interference to improve the equalization effect, and make it possible to improve the adaptability of the high-speed digital signal transmission system. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which a number of embodiments of the application are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0019] Figure 1 An architectural block diagram of the gain interval division method of adaptive CTLE in high-speed digital transmission is schematically shown;

[0020] Figure 2 A flowchart of the gain interval division method of adaptive CTLE in high-speed digital transmission is schematically shown;

[0021] Figure 3 A structural diagram of a gain interval division device of adaptive CTLE in high-speed digital transmission is schematically shown. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0023] It should be noted that: unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the skilled person in the field to which the present application belongs.

[0024] The method in the embodiments of the present application is described in detail below.

[0025] Figure 1 The architecture block diagram of the gain interval division method of adaptive CTLE in high-speed digital transmission is schematically shown, which includes a sending end, a channel, a CTLE module, a CTLE control module, a threshold calculation module, an Automatic Gain Control (AGC) module and a DFE module. The receiving end includes a CTLE module, a CTLE control module, a threshold calculation module, an AGC module and a DFE module. Among them, the receiving end receives the digital signal after the sending end and the channel, that is, the received signal, which will be affected by factors such as inter-symbol interference and noise. The digital signal passes through the CTLE module, the AGC module and the DFE module in turn, and the first preset tap coefficient of the DFE is generated in the DFE module . The first preset tap coefficient is fed back to the threshold calculation module, which can calculate the standard deviation of the noise according to the digital signal, the transmission signal and the total number of noise samples, and determine the first target tap coefficient of the channel impulse response based on the first preset tap coefficient , determine the first threshold, the second threshold and the third threshold corresponding to the CTLE gain according to the first target tap coefficient , the standard deviation of the noise and the inverse function of the standard normal distribution, and divide the range corresponding to the first preset tap coefficient into four intervals by using the first threshold, the second threshold and the third threshold; the CTLE control module dynamically adjusts the gain of the CTLE according to the transition of the first preset tap coefficient in the four intervals. Among them, any two intervals are compared, and the interval with smaller values can be called a low interval, and the interval with higher values can be called a high interval. Specifically, if the value of the first preset tap coefficient transfers from a low interval to a high interval, the CTLE control module outputs +1, and correspondingly, the CTLE module selects a configuration with a higher gain; on the contrary, if the value of the first preset tap coefficient transfers from a high interval to a low interval, the CTLE control module outputs -1, and correspondingly, the CTLE module selects a configuration with a lower gain, so as to finally realize the stable dynamic convergence of the CTLE gain.

[0026] Figure 2A flowchart illustrating the gain interval partitioning method for adaptive CTLE in high-speed digital transmission according to an embodiment of the present invention is shown. See [link to flowchart illustration]. Figure 2 As shown, the gain interval division method for adaptive CTLE in this high-speed digital transmission may include:

[0027] S201. Obtain the first preset tap coefficient of the decision feedback equalizer.

[0028] The first preset tap factor of DFE It is obtained in real time.

[0029] Before obtaining the first preset tap coefficient of the decision feedback equalizer, the following steps are also included:

[0030] In digital communication systems, noise is typically modeled as additive white Gaussian noise, and the corresponding expression for the received signal is:

[0031] ;

[0032] in, For the first Received signal at discrete time sampling points For the first Transmission signal at discrete time sampling points For the first Gaussian white noise at discrete time sampling points has a mean of 0 and a variance of _(noise variance)_. Gaussian white noise.

[0033] The following can be determined from the expression of the received signal: .

[0034] for For each noise sample, the noise power is calculated as follows: ,in, For noise power, This represents the total number of noise samples.

[0035] Standard deviation of noise for: .

[0036] S202. Determine the first target tap coefficient of the channel impulse response based on the first preset tap coefficient.

[0037] The first preset tap factor of the DFE is used to eliminate inter-symbol interference from the previous time step. The value of the first preset tap factor of the DFE is related to the channel impulse response and noise.

[0038] Specifically, based on the first preset tap coefficient, the first target tap coefficient of the channel impulse response is determined, including:

[0039] Step A1: determining an expected value of the first preset tap coefficient.

[0040] Step A2: determining the expected value as the first target tap coefficient.

[0041] For a conventional channel model, the expression of the first target tap coefficient is:

[0042] ;

[0043] wherein, is the first target tap coefficient, is the first preset tap coefficient, is the expected value of the first preset tap coefficient.

[0044] In order to determine the values of the first threshold and the second threshold , the statistical characteristics of the first preset tap coefficient need to be analyzed. Since the first preset tap coefficient is an estimated value based on noise, the value of the first preset tap coefficient will fluctuate with the change of noise. Therefore, the first threshold and the second threshold need to be set so that the gain of the CTLE can be correctly and effectively adjusted in the presence of noise.

[0045] After step S202, it further includes:

[0046] Step B1: determining an estimated value of the first preset tap coefficient.

[0047] wherein the estimated value is subject to a Gaussian distribution with a mean of the first target tap coefficient and a variance of a noise variance.

[0048] Specifically, the estimated value of the first preset tap coefficient is subject to a Gaussian distribution with a mean of the first target tap coefficient and a variance of a noise variance :

[0049] ;

[0050] wherein, is the estimated value of the first preset tap coefficient, is a normal distribution, is the noise variance.

[0051] Step B2: determining the probability that the value of the first expression is less than the value of the second expression as a false positive probability.

[0052] wherein the first expression is an expression of the difference between the estimated value and the difference of the first target tap coefficient divided by the standard deviation of the noise. The second expression is an expression of the first threshold minus the difference of the first target tap coefficient divided by the standard deviation of the noise.

[0053] In order to ensure that the gain adjustment of the CTLE is effective in the presence of noise, the value of the first threshold satisfies the condition that:

[0054] ;

[0055] wherein is the probability, is the first threshold, is the false alarm probability, is usually taken as a smaller value, for example, the value of is 0.05 or 0.01.

[0056] According to the properties of the normal distribution, the above formula is adjusted to the following expression of the false alarm probability:

[0057] ;

[0058] wherein is the false alarm probability, is the estimated value, is the first target tap coefficient, is the standard deviation of the noise, is the first threshold, is the probability. is the first expression, is the second expression.

[0059] Step B3: Determine the inverse function of the standard normal distribution according to the false alarm probability and the standard normal distribution table.

[0060] The expression of the inverse function of the standard normal distribution is:

[0061] ;

[0062] wherein is the false alarm probability corresponding to the inverse function of the standard normal distribution.

[0063] The inverse function of the standard normal distribution corresponding to the value can be obtained by looking up the standard normal distribution table.

[0064] S203, determining the first threshold value, the second threshold value and the third threshold value of the range corresponding to the first preset tap coefficient according to the first target tap coefficient, the standard deviation of the noise and the inverse function of the standard normal distribution.

[0065] Specifically, the first threshold value, the second threshold value and the third threshold value of the range corresponding to the first preset tap coefficient are determined according to the first target tap coefficient, the standard deviation of the noise and the inverse function of the standard normal distribution, including:

[0066] Step C1: determining the first target tap coefficient as the second threshold value.

[0067] The second threshold value is equal to the optimal value of the first preset tap coefficient , and the expression of the second threshold value is:

[0068] ;

[0069] The second threshold value is the first target tap coefficient .

[0070] The expression of the second threshold value can determine that when the estimated value of the first preset tap coefficient is equal to the first target tap coefficient of the channel impulse response, the gain of the CTLE reaches the optimum.

[0071] Step C2: determining the first threshold value and the third threshold value according to the first target tap coefficient, the inverse function of the standard normal distribution and the standard deviation of the noise.

[0072] The expression of the first threshold value is:

[0073] ;

[0074] The first threshold value is the first target tap coefficient , the false positive probability is the inverse function of the standard normal distribution corresponding to the false positive probability , and the standard deviation of the noise . The first threshold value

[0075] depends on the false positive probability and the standard deviation of the noise .

[0076] The first threshold value and the third threshold value ​Regarding the second threshold value Symmetric, so the expression of the third threshold value can be determined as:

[0077] ;

[0078] Wherein, is the third threshold value, is the second threshold value, is the first threshold value, is the first target tap coefficient, is the false positive probability, is the false positive probability corresponding to the inverse function of the standard normal distribution, is the standard deviation of the noise.

[0079] S204, using the first threshold value, the second threshold value and the third threshold value, the range corresponding to the first preset tap coefficient is divided into multiple intervals.

[0080] The multiple intervals can be four intervals, the range corresponding to the first preset tap coefficient includes a left boundary value and a right boundary value, and the four intervals can be in turn [left boundary value, first threshold value ], [first threshold value , second threshold value ], [second threshold value , third threshold value ] and [third threshold value , right boundary value].

[0081] S205, using the first preset tap coefficient and the multiple intervals, the CTLE gain is adaptively adjusted.

[0082] Specifically, according to the transition of the first preset tap coefficient in the four intervals, the CTLE gain is dynamically adjusted. Among them, any two intervals in the four intervals are compared, and the interval with smaller value in any two intervals can be called low interval, and the interval with higher value can be called high interval. For example, in the four intervals: [left boundary value, first threshold value ] and [first threshold value , second threshold value ], [second threshold value , third threshold value ], [third threshold value , right boundary value] are compared, [left boundary value, first threshold value ] is the low interval, [first threshold value , second threshold value ], [second threshold value , third threshold value ] and [third threshold value [Right boundary value] All three intervals are high intervals; [First threshold] Second threshold ] and the second threshold Third threshold [Third threshold] Comparing the two intervals, [right boundary value], [first threshold] Second threshold All are low ranges, second threshold. Third threshold ] and [third threshold] [Right boundary value] are all in the high interval; [Second threshold] Third threshold [and [third threshold]] [Right boundary value] comparison, [Second threshold] Third threshold [This is the low interval, [the third threshold]] The right boundary value is the high interval.

[0083] Specifically, if the first preset tap coefficient If the value shifts from the low range to the high range, the output of the CTLE control module is incremented by 1, and the CTLE module is configured to select a higher gain level; conversely, if the first preset tap coefficient... When the value shifts from the high range to the low range, the output of the CTLE control module is reduced by 1. Correspondingly, the CTLE module is configured to select a lower gain level, ultimately achieving stable dynamic convergence of the CTLE gain.

[0084] The three thresholds for adaptive CTLE gain in high-speed digital signal transmission systems can be designed for adaptive dynamic adjustment, since the three thresholds acquired in real time can be based on the first target tap coefficient. and the standard deviation of noise To be dynamically adjusted, and the first target tap coefficient It is determined by the first preset tap coefficient. Determined by the standard deviation of noise It is determined by the noise power, so it can be understood that the three thresholds are based on the first preset tap coefficient. It adaptively adjusts noise power to achieve more precise and stable gain control, better meeting the needs of different users.

[0085] Based on the above Figure 1As can be seen from the implementation mode, the embodiment of the application acquires a first preset tap coefficient of a decision feedback equalizer; determines a first target tap coefficient of a channel impulse response according to the first preset tap coefficient; determines a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution; divides the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value; and adaptively adjusts a CTLE gain by using the first preset tap coefficient and the multiple intervals. In this way, the first threshold value, the second threshold value and the third threshold value can be adaptively adjusted according to a noise power corresponding to the first preset tap coefficient and the standard deviation of noise, fine and stable gain control is realized, the range interval corresponding to the first preset tap coefficient is divided more finely and accurately based on the adaptive adjustment of the first preset tap coefficient and the noise power, signal distortion and bit error rate are reduced, the stability of gain convergence is improved, the equalization effect is improved by effectively coping with burst high noise interference, and the adaptability of a high-speed digital signal transmission system can be improved.

[0086] Based on the same inventive concept, as an implementation of the above-mentioned gain interval division method of the adaptive CTLE in the high-speed digital transmission, the embodiment of the application further provides a gain interval division device of the adaptive CTLE in the high-speed digital transmission. Figure 3 The structure diagram of the gain interval division device of the adaptive CTLE in the high-speed digital transmission in the embodiment of the application is shown in FIG. 3, which can include: Figure 3

[0087] The decision feedback equalizer module 301 is configured to generate a first preset tap coefficient of a decision feedback equalizer.

[0088] The threshold value calculation module 302 is configured to determine a first target tap coefficient of a channel impulse response according to the first preset tap coefficient, and determine a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution.

[0089] The division module 303 is configured to divide the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value.

[0090] The CTLE control module 304 is configured to adaptively adjust a CTLE gain by using the first preset tap coefficient and the multiple intervals.

[0091] ​The threshold calculation module 302 is specifically configured to determine an expected value of the first preset tap coefficient; determine the expected value as a first target tap coefficient; determine the first target tap coefficient as a second threshold; and determine a first threshold and a third threshold according to the first target tap coefficient, an inverse function of a standard normal distribution, and a standard deviation of noise.

[0092] In the threshold calculation module 302, an expression of the first target tap coefficient is as follows:

[0093] ;

[0094] Wherein, the first target tap coefficient is denoted as, the first preset tap coefficient is denoted as, an expected value of the first preset tap coefficient is denoted as.

[0095] The gain interval division device of the adaptive CTLE in the high-speed digital transmission can further include:

[0096] The estimation value determination module is configured to, after determining the first target tap coefficient of the channel impulse response according to the first preset tap coefficient, determine an estimation value of the first preset tap coefficient, the estimation value being subject to a Gaussian distribution with a mean value of the first target tap coefficient and a variance of a noise variance.

[0097] The misjudgment probability determination module is configured to determine a probability that a value of a first expression is less than a value of a second expression as a misjudgment probability, the first expression being an expression of a difference between the estimation value and the first target tap coefficient divided by a standard deviation of the noise, and the second expression being an expression of a difference between the first threshold and the first target tap coefficient divided by the standard deviation of the noise.

[0098] The inverse function of the standard normal distribution determination module is configured to determine the inverse function of the standard normal distribution according to the misjudgment probability and a standard normal distribution table.

[0099] In the misjudgment probability determination module, an expression of the misjudgment probability is as follows:

[0100] ;

[0101] Wherein, the misjudgment probability is denoted as, the estimation value is denoted as, the first target tap coefficient is denoted as, a standard deviation of the noise is denoted as, the first threshold is denoted as, a probability is denoted as.

[0102] In the threshold calculation module 302, an expression of the second threshold is as follows:

[0103] ;

[0104] wherein, is a second threshold value, is a first target tap coefficient.

[0105] In the threshold calculation module 302, the expression of the first threshold value is:

[0106] ;

[0107] wherein, is a first threshold value, is a first target tap coefficient, is a false positive probability, is a false positive probability is an inverse function of a standard normal distribution corresponding to the false positive probability, is a standard deviation of the noise.

[0108] In the threshold calculation module 302, the expression of the third threshold value is:

[0109] ;

[0110] wherein, is a third threshold value, is a second threshold value, is a first threshold value, is a first target tap coefficient, is a false positive probability, is a false positive probability is an inverse function of a standard normal distribution corresponding to the false positive probability, is a standard deviation of the noise.

[0111] It is pointed out here that the above description of the embodiment of the gain interval division device of the adaptive CTLE in high-speed digital transmission is similar to the above description of the embodiment of the gain interval division method of the adaptive CTLE in high-speed digital transmission, and has similar beneficial effects as the embodiment of the gain interval division method of the adaptive CTLE in high-speed digital transmission. For technical details not disclosed in the embodiment of the gain interval division device of the adaptive CTLE in high-speed digital transmission of the present application, please refer to the description of the embodiment of the gain interval division method of the adaptive CTLE in high-speed digital transmission of the present application for understanding.

[0112] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gain range partitioning method for adaptive CTLE in high-speed digital transmission, characterized in that, The method comprises the following steps: obtaining a first preset tap coefficient of a decision feedback equalizer in real time; determining a first target tap coefficient of a channel impulse response according to the first preset tap coefficient; determining a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution; dividing the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value; adaptively adjusting a CTLE gain by using the first preset tap coefficient and the multiple intervals; an expression of the first target tap coefficient is: ； wherein, is the first target tap coefficient, is the first preset tap coefficient, is an expected value of the first preset tap coefficient.

2. The method of claim 1, wherein the gain range partitioning of the adaptive CTLE in high-speed digital transmission is characterized by, after determining the first target tap coefficient of the channel impulse response according to the first preset tap coefficient, the method further comprises the following steps: determining an estimated value of the first preset tap coefficient, wherein the estimated value is subject to a Gaussian distribution with a mean value of the first target tap coefficient and a variance of a noise variance; determining a misjudgment probability according to a probability that a value of a first expression is less than a value of a second expression, wherein the first expression is an expression of a ratio of a difference between the estimated value and the first target tap coefficient to the standard deviation of the noise, and the second expression is an expression of a ratio of a difference between the first target tap coefficient and the first threshold value to the standard deviation of the noise; determining the inverse function of the standard normal distribution according to the misjudgment probability and a standard normal distribution table.

3. The method of claim 2, wherein the gain interval is divided into a plurality of gain intervals according to a gain interval division table. an expression of the misjudgment probability is: ； wherein, is the false positive probability, is the estimate, is the first target tap coefficient, is the standard deviation of the noise, is the first threshold, is the probability.

4. The method of claim 2, wherein the gain interval is divided into a plurality of gain intervals according to a gain interval division table. the method of determining the first threshold value, the second threshold value and the third threshold value of the range corresponding to the first preset tap coefficient according to the first target tap coefficient, the standard deviation of the noise and the inverse function of the standard normal distribution comprises the following steps: determining the first target tap coefficient as the second threshold value; determining the first threshold value and the third threshold value according to the first target tap coefficient, the inverse function of the standard normal distribution and the standard deviation of the noise.

5. The gain bin partitioning method for adaptive CTLE in high-speed digital transmission of claim 4, wherein, an expression of the second threshold value is: ； wherein, is the second threshold value, is the first target tap coefficient.

6. The method of claim 4, wherein, an expression of the first threshold value is: ； wherein, is the first threshold value, is the first target tap coefficient, is the false positive probability, is the false positive probability is the inverse function of the standard normal distribution, is the standard deviation of the noise.

7. The method of claim 4, wherein the gain range partitioning of the adaptive CTLE in high-speed digital transmission is characterized by, an expression of the third threshold value is: ； wherein, is the third threshold value, is the second threshold value, is the first threshold value, is the first target tap coefficient, is the false positive probability, is the false positive probability is the inverse function of the standard normal distribution, is the standard deviation of the noise.

8. A gain range partitioning device for adaptive CTLE in high-speed digital transmission, characterized in that, The method comprises the following steps: a decision feedback equalizer module is configured to generate a first preset tap coefficient of a decision feedback equalizer in real time; a threshold calculation module is configured to determine a first target tap coefficient of a channel impulse response according to the first preset tap coefficient, and determine a first threshold value, a second threshold value and a third threshold value of a range corresponding to the first preset tap coefficient according to the first target tap coefficient, a standard deviation of noise and an inverse function of a standard normal distribution; a division module is configured to divide the range corresponding to the first preset tap coefficient into multiple intervals by using the first threshold value, the second threshold value and the third threshold value; a CTLE control module is configured to adaptively adjust a CTLE gain by using the first preset tap coefficient and the multiple intervals; in the threshold calculation module, an expression of the first target tap coefficient is: ； wherein, is the first target tap coefficient, is the first preset tap coefficient, is an expected value of the first preset tap coefficient.

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