CN107911091A - The method and circuit of a kind of adjust gain - Google Patents

Abstract

Embodiments of the present invention provide a method and circuit for adjusting gain, which are used to solve the technical problem of low accuracy in signal power adjustment of a communication system. The method includes: multiplying the first frame signal of the at least two frame signals included in the received input signal by the initial gain value to obtain the first frame gain signal corresponding to the first frame signal; the signal according to the first frame gain signal The power is first adjusted to the initial gain value to obtain the first gain value, and the first frame gain signal is multiplied by the first gain value to obtain the second frame gain signal; according to the signal power of the second frame gain signal to the first The gain value is adjusted for the second time to obtain the adjusted second gain value; wherein, the adjustment value of the first adjustment is greater than the adjustment value of the second adjustment, and the signal power corresponding to the second gain value is within the power range allowed by the system; The second gain value is determined as an initial gain value of a second frame signal following the first frame signal among the at least two frame signals.

Description

A method and circuit for adjusting gain

technical field

The invention relates to the field of communication technology, in particular to a method and circuit for adjusting gain.

Background technique

In the communication system, the size of the power directly affects the stability of the system, so the stability adjustment of the signal power has always been crucial.

Automatic gain control (automatic gain control, AGC) refers to the use of an effective combination of linear amplification and compression amplification to adjust the output signal. Through the AGC function, the input and output compression ratio can be changed to automatically control the gain range, so that the gain of the amplifier circuit is automatically adjusted with the signal strength. The automatic control method is actually to automatically adjust the amplification factor of the amplifier and use the principle of negative feedback. , to sample the amplitude of the output signal, and obtain the corresponding control value to reversely adjust the amplification factor of the amplifier.

At present, in order to avoid excessive power or low power of the signal, an AGC circuit is usually used for periodic detection. As shown in Figure 1, it is a schematic circuit diagram of an AGC circuit in the prior art, which mainly uses the gain adjustment module to perform a large increase or decrease of the signal gain for power adjustment, and then feeds back the adjusted gain value to the following one cycle. However, such large-scale adjustments are likely to cause sudden changes in the output signal and affect the characteristics of the signal itself.

To sum up, it can be seen that the communication system in the prior art has a poor control effect on the signal power of the signal, and the adjustment precision is low.

Contents of the invention

Embodiments of the present invention provide a method and a circuit for adjusting gain, which are used to solve the technical problems of poor signal power control effect and low adjustment accuracy in a communication system.

In a first aspect, an embodiment of the present invention provides a method for adjusting gain, including the following steps:

multiplying the first frame signal of the at least two frame signals included in the received input signal by the initial gain value to obtain a first frame gain signal corresponding to the first frame signal;

Perform a first adjustment to the initial gain value according to the signal power of the first frame gain signal to obtain a first gain value, and multiply the first frame gain signal by the first gain value to obtain a second frame gain signal;

Performing a second adjustment on the first gain value according to the signal power of the second frame gain signal to obtain an adjusted second gain value; wherein the first adjusted adjustment value is greater than the second adjusted adjustment value, and the signal power corresponding to the second gain value is within the power range allowed by the system;

The second gain value is determined as an initial gain value of a second frame signal after the first frame signal among the at least two frame signals.

Optionally, performing a first adjustment to the initial gain value according to the signal power of the first gain frame signal to obtain a first gain value includes:

determining a first preset power range in which the signal power of the first frame gain signal is located;

determining a gain adjustment value corresponding to the first preset power range according to a correspondence between a power range and a gain adjustment value;

The initial gain value is adjusted according to the gain adjustment value to obtain an adjusted first gain value.

Optionally, performing a second adjustment to the first gain value according to the signal power of the second frame gain signal to obtain an adjusted second gain value, including:

dividing the second frame gain signal into a plurality of subframe gain signals, and recording a power signal corresponding to each subframe gain signal;

Determining at least two subframe gain signals whose signal power is not within a second preset power range among the plurality of subframe gain signals; wherein, the power interval of the second preset power range is smaller than the first preset power range the power range;

Determine at least two sub-gain adjustment values corresponding to the at least two sub-frame gain signals according to the at least two sub-frame gain signals and the second preset power range;

The first gain value is sequentially adjusted according to the at least two sub-gain adjustment values to obtain a second gain value.

Optionally, determining at least two sub-gain adjustment values corresponding to the at least two sub-frame gain signals according to the at least two sub-frame gain signals and the second preset power range includes:

determining a magnitude relationship between the signal power of each subframe gain signal in the at least two subframe gain signals and the maximum and minimum values of the second preset power range;

If it is determined that the signal power of the subframe gain signal is greater than the maximum value, then determine that the sub-gain adjustment value corresponding to the subframe gain signal is the first adjustment value, or, if it is determined that the signal power of the subframe gain signal is less than the minimum value , then determine that the sub-gain adjustment value corresponding to the sub-frame gain signal is a second adjustment value;

Wherein, the first adjustment value is used to increase the first gain value by a first preset value, and the second adjustment value is used to decrease the first gain value by a second preset value.

Optionally, adjusting the first gain value sequentially according to the at least two sub-gain adjustment values to obtain a second gain value includes:

determining an adjustment value corresponding to each sub-gain adjustment value in the at least two sub-gain adjustment values, where the adjustment value is the first adjustment value or the second adjustment value;

The first gain value is adjusted according to all the determined adjustment values to obtain an adjusted second gain value.

In the second aspect, an embodiment of the present invention provides a circuit for adjusting gain, including:

A signal receiving module, configured to receive an input signal and divide the input signal into at least two frames of signals;

A first signal gain module, configured to multiply the first frame signal of the at least two frame signals by an initial gain value to obtain a first frame gain signal corresponding to the first frame signal;

A first adjustment module, connected to the first signal gain module, configured to first adjust the initial gain value according to the signal power of the first frame gain signal to obtain a first gain value;

The second signal gain module is respectively connected to the first signal gain module and the first adjustment module, and is used to multiply the first frame gain signal by the first gain value to obtain a second frame gain signal ;

A second adjustment module, connected to the second signal gain module, configured to perform a second adjustment on the first gain value according to the signal power of the second frame gain signal to obtain an adjusted second gain value, and Feedback the second gain value to the first signal gain module, so that the second gain value is used as the initial gain value of the next frame signal; wherein, the first adjusted adjustment value is greater than the second The adjusted adjustment value, the signal power corresponding to the second gain value is within the power range allowed by the system.

Optionally, the circuit also includes:

A signal output module, connected to the first signal gain module, for outputting the signal processed by the first signal gain module.

Optionally, the first adjustment module includes:

The first power statistics module is used to record the signal power of the first frame gain signal currently received;

A first power comparison module, configured to compare the signal power of the first frame gain signal with a power range corresponding to each power range in multiple preset power ranges, and determine the signal power of the first frame gain signal the first preset power range;

The first gain adjustment module is configured to determine a gain adjustment value corresponding to the signal power of the first frame gain signal according to the correspondence between the power range and the gain adjustment value, and adjust the initial gain value according to the gain adjustment value, Get the first gain value.

Optionally, the second adjustment module includes:

The second power statistics module is configured to divide the received second frame gain signal into multiple subframe gain signals, and record the power signal corresponding to each subframe gain signal;

The second power comparison module is used to compare the signal power of each subframe gain signal with the maximum value and minimum value of the second preset power range, and determine that the signal power of the plurality of subframe gain signals is not within the second preset power range At least two subframe gain signals within a power range; wherein, the power interval of the second preset power range is smaller than the power interval of the first preset power range;

The second gain adjustment module is configured to determine at least two sub-gain adjustment values corresponding to the at least two sub-frame gain signals according to the at least two sub-frame gain signals and the second preset power range, and according to the at least two sub-frame gain adjustment values The two sub-gain adjustment values sequentially adjust the first gain value to obtain a second gain value.

Optionally, the second power comparison module is used for:

determining a magnitude relationship between the signal power of each subframe gain signal in the at least two subframe gain signals and the maximum and minimum values of the second preset power range;

If it is determined that the signal power of the subframe gain signal is greater than the maximum value, then determine that the sub-gain adjustment value corresponding to the subframe gain signal is the first adjustment value, or, if it is determined that the signal power of the subframe gain signal is less than the minimum value , then determine that the sub-gain adjustment value corresponding to the sub-frame gain signal is a second adjustment value;

Wherein, the first adjustment value is used to increase the first gain value by a first preset value, and the second adjustment value is used to decrease the first gain value by a second preset value.

Optionally, the second gain adjustment module is used for:

Determine the adjustment value corresponding to each sub-gain adjustment value in the at least two sub-gain adjustment values, and adjust the first gain value according to all the determined adjustment values to obtain an adjusted second gain value; wherein, The adjustment value is the first adjustment value or the second adjustment value.

In a third aspect, an embodiment of the present invention provides a computer device, the computer device includes a processor, and the processor is configured to implement the method described in the second aspect when executing a computer program stored in a memory.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and when the instructions are run on a computer, the computer executes the method as described in the second aspect .

In the embodiment of the present invention, the signal power of the gain signal is obtained by dividing the input signal into multiple frame signals, and multiplying the current frame signal with the initial gain value obtained in the previous cycle, and according to the signal power of the gain signal Adjust the initial gain value with different precision to obtain the adjusted second gain value whose corresponding signal power is within the power range allowed by the system, and realize the frame signal as the basis for adjustment, which can achieve real-time and fast adjustment effect with higher accuracy .

At the same time, by applying the gain value to the signal of the next frame, the signal power can be maintained within an ideal range and the stability of the signal power of the output signal can be guaranteed.

Description of drawings

Fig. 1 is the schematic diagram of AGC circuit in the prior art;

FIG. 2 is a schematic diagram of a circuit for adjusting gain provided in an embodiment of the present invention;

3 is a block diagram of a circuit for adjusting gain in an embodiment of the present invention;

4 is a schematic diagram of a power range and a corresponding gain adjustment value in an embodiment of the present invention;

FIG. 5 is a flowchart of a method for adjusting gain in an embodiment of the present invention;

FIG. 6 is a structural diagram of a computer device in an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following, the above technical solutions will be described in detail in conjunction with the accompanying drawings and specific implementation manners.

Embodiment one

The gain adjusting circuit provided in the embodiment of the present invention may be an AGC circuit, and its circuit structure is shown in FIG. 2 . The gain adjusting circuit includes a signal receiving module 10, a first signal gain module 20, a first adjusting module 30, a The second signal gain module 40 and the second adjustment module 50 .

In practical applications, the gain adjusting circuit further includes a signal output module 60, which is also shown in FIG. 2 . The gain adjusting circuit in the embodiment of the present invention may be applied in a communication system, for example, may be applied in signal reception/transmission.

Specifically, the signal receiving module 10 may be configured to receive an input signal and divide the input signal into at least two frames of signals. That is to say, the signal receiving module 10 can divide the received input signal into frames, so as to adjust the input signal into an applicable serial form. For example, the input signal is conditioned to an applicable serial form with 10 ms frame intervals.

In practical applications, the signal receiving module 10 may divide the input signal into frames in real time, and send the divided frame signals to the first signal gain module 20 in sequence.

The first signal gain module 20 may be configured to multiply the first frame signal of the at least two received frame signals by an initial gain value to obtain a first frame gain signal corresponding to the first frame signal. The first frame signal may refer to the frame signal from the signal receiving module 10 currently received by the first signal gain module 20 .

Wherein, the initial gain value mainly refers to the gain value obtained after adjustment in the previous cycle. That is, the initial gain value may represent the gain value determined by the adjustment module when the system adjusts the signal power of the previous frame signal of the current frame signal to a normal power range. When the adjustment module is used for the first time, the initial gain value may be a preset gain value, such as 1000.

In practical applications, the first signal gain module 20 may be an amplifier or a functional module including an amplifier. If the amplification factor of the amplifier is K=100, the corresponding gain may be 20*logK, that is, 40.

The first adjustment module 30, connected to the first signal gain module 20, may be configured to first adjust the initial gain value according to the signal power of the first frame gain signal to obtain a first gain value.

The module structure diagram of the circuit for adjusting the gain in the embodiment of the present invention is shown in FIG. 3 , where the arrow symbols may indicate the processing flow of the frame signal. Specifically, the first adjustment module 30 may include the following functional modules:

① The first power statistics module can be used to record the signal power of the currently received first frame gain signal.

In the statistical process, the first power statistics module can identify the frame header of the received frame signal, and record the signal power of the currently received frame signal. At the same time, the first power statistics module can also clean up the power records of previous statistics, such as records The signal power of the previous frame signal.

②The first power comparison module, connected to the first power statistics module, can be used to compare the signal power of the first frame gain signal with the power range corresponding to each power range in multiple preset power ranges, and determine the first frame The signal power of the gain signal is in the first preset power range. In practical applications, the first power comparison module may be a functional module provided with a comparator.

Wherein, the plurality of preset power ranges may be common power ranges preset in advance, for example, the range of signal power in which the received signal may be determined is determined according to the working nature of the system. One of the preset power ranges may correspond to a normal signal power range, which may be referred to as a rated preset power range herein.

In the embodiment of the present invention, multiple power thresholds can be set, two adjacent power thresholds correspond to a preset power range, and the power difference between two adjacent power thresholds among the multiple power thresholds Can be the same, for example, 3dB. For example, four power thresholds can be set in the system, which are in order from large to small: ADC overflow threshold, power high threshold 1, power high threshold 2, and power low threshold. To withstand the power to develop, the high power threshold 1 can be set according to the maximum power of the previous signal, the high power threshold 2 can be set according to the rated power peak value of the normal signal, and the low power threshold can be set according to the minimum signal power required by the test signal to formulate.

Multiple preset power ranges may be determined according to the above power threshold value. For example, if the signal power is P, then the preset power range determined according to the threshold value may include: the first power range, P≥ADC overflow threshold; the second power range, ADC overflow threshold>P≥power high threshold 1; In the III power range, the high power threshold 1≥P>the high power threshold 2; in the IV power range, the high power threshold 2≥P>the low power threshold; in the Vth power range, P≤the low power threshold. In the embodiment of the present invention, the power range formed by the high power threshold 2 and the low power threshold may be determined as the rated power range, and it is generally considered that a signal whose signal power is within the rated power range is a normal signal.

Then, the first power comparison module can compare the statistical signal power of the first frame gain signal with the set power threshold value to locate which interval the signal power is in this time, or it can also judge the first frame gain signal Whether the preset power range of the signal power is within the rated power range.

③The first gain adjustment module is connected with the first power comparison module, and is used to determine the gain adjustment value corresponding to the signal power of the first frame gain signal according to the corresponding relationship between the power range and the gain adjustment value, and to adjust the initial gain adjustment value according to the gain adjustment value. The gain value is adjusted to obtain the first gain value.

That is to say, each power range in multiple preset power ranges can correspond to a gain adjustment value. In the set preset power range, the greater the power threshold value of the power range, the greater the effect of the preset power range on the signal power. The larger the adjustment, the larger the adjusted gain adjustment value can be.

For example, both the first power range and the adjusted signal power corresponding to the first power range can be -3dB (that is, reduce the power by 3dB), and the corresponding gain adjustment value can be -200, that is, reduce the initial gain value by 200. The adjusted signal power corresponding to the third power range can be -1dB, and the corresponding gain adjustment value can be -150, that is, the initial gain value is reduced by 150; the fourth power range can be the rated power range, and the corresponding gain adjustment value can be 0, That is to say, if the signal power is within this range, there is no need to adjust the gain value; the adjusted signal power corresponding to the Vth power range may be +1 dB, and the corresponding gain adjustment value may be +150.

Each preset power range and the corresponding adjusted signal power are shown in Figure 4. In the figure, the double arrow indicates the power difference between the two thresholds, and the unidirectional upward arrow indicates increasing the signal power (corresponding to increasing the first Gain value), and a unidirectional downward arrow means reducing the signal power (corresponding to reducing the first gain value).

Therefore, after the first gain adjustment module determines the preset power range in which the signal power of the gain signal of the first frame is located, it can adjust the initial gain value according to the gain value corresponding to the preset power range to obtain the adjusted gain value.

For example, the initial gain value is 1000, if it is determined that the signal power of the first frame gain signal is greater than the ADC overflow threshold, that is, within the first power range, the initial gain value can be adjusted to 800. Alternatively, if it is determined that the signal power of the gain signal in the first frame is within the third range, the initial gain value may be adjusted to 850. Alternatively, if it is determined that the signal power of the gain signal of the first frame is within the fourth range, there is no need to adjust the gain value, and at this time, the determined first gain value may be the same as the initial gain value.

In the embodiment of the present invention, the first adjustment module 30 determines to increase or decrease the signal power by determining the preset power range of the signal power, so as to make a large adjustment to the initial gain value, that is, based on the power adjustment requirement, The initial gain value is correspondingly increased or decreased, so that the signal power corresponding to the adjusted first gain value is at or closer to the rated power range.

The second signal gain module 40 is connected to the first signal gain module 20 and the first adjustment module 30 respectively, and is used for multiplying the first gain signal frame by the first gain value to obtain the second gain signal frame.

Specifically, after determining the first gain value, the first gain adjustment module sends the first gain value to the second signal gain module 40 . At the same time, the second signal gain module 40 also receives the first frame gain signal sent by the first signal gain module 20, and multiplies the first frame gain signal with the first gain value by a multiplier to obtain the second frame gain signal. The gain signals of the second frame and the gain signal of the first frame have different signal amplitudes.

In the embodiment of the present invention, the first adjustment module 30 first adjusts the initial gain signal according to the signal power of the first frame gain signal, and feeds back the adjusted first gain value to act on the first frame gain signal, A first AGC circuit loop is formed.

The second adjustment module 50 is connected to the second signal gain module 40, and is used to perform a second adjustment to the first gain value according to the signal power of the second gain signal frame, obtain the adjusted second gain value, and convert the second gain The value is fed back to the first signal gain module 20, so that the second gain value is used as the initial gain value of the next signal frame; wherein, the first adjusted adjustment value is greater than the second adjusted adjustment value, and the signal power corresponding to the second gain value It is within the power range allowed by the system.

That is to say, further small adjustments to the first gain value by the second adjustment module 50 can make the determined signal power corresponding to the second gain value within the power range allowed by the system.

Specifically, the second adjustment module 50 includes the following functional modules:

① The second power statistics module is configured to divide the received second frame gain signal into multiple subframe gain signals, and record the power signal corresponding to each subframe gain signal. For example, the 10ms second frame gain signal is divided into ten 1ms subframe gain signals, and the signal power of each subframe gain signal is recorded.

②The second power comparison module is used to compare the signal power of each subframe gain signal with the maximum value and minimum value of the second preset power range, and determine that the signal power in the multiple subframe gain signals is not at the second preset power At least two subframe gain signals within the range; wherein, the power interval of the second preset power range is smaller than the power interval of the first preset power range.

Wherein, the maximum value (or high power threshold) and minimum value (or low power threshold) of the second preset power range may be determined by the highest power value and the lowest power value allowed by normal signals.

The second power comparison module may determine a magnitude relationship between the signal power of each subframe gain signal in the at least two subframe gain signals and the maximum and minimum values of the second preset power range.

If it is determined that the signal power of the subframe gain signal is greater than the maximum value, then determine that the sub-gain adjustment value corresponding to the subframe gain signal is the first adjustment value, or, if it is determined that the signal power of the subframe gain signal is less than the minimum value, then determine the The sub-gain adjustment value corresponding to the sub-frame gain signal is a second adjustment value; wherein, the first adjustment value is used to increase the first gain value by a first preset value, for example, the first gain value may be +100, and the second adjustment value The value is used to reduce the first gain value by a second preset value, for example, the first gain value may be -100.

Therefore, the second power comparison module can determine the adjustment value corresponding to each sub-gain adjustment value in the at least two sub-gain adjustment values, for example, +100 or -100, and perform the adjustment on the first gain value according to all the determined adjustment values. Adjusting to obtain an adjusted second gain value, where the adjusted value is the first adjusted value or the second adjusted value.

③ The second gain adjustment module is configured to determine at least two sub-gain adjustment values corresponding to at least two sub-frame gain signals according to at least two sub-frame gain signals and the second preset power range, and perform sequential adjustment according to the at least two sub-gain adjustment values The first gain value is adjusted to obtain the second gain value.

In the embodiment of the present invention, the second adjustment module 50 further adjusts the first gain signal according to the signal power of the second frame gain signal, and feeds back the adjusted second gain value to the first signal gain module 20, so as to It acts on the second frame signal to form a second AGC circuit loop, and the second AGC circuit loop can realize fine adjustment of signal power, so the whole circuit system can be realized by a large coarse adjustment and a small fine adjustment Control the signal power of the system to achieve the technical effect of keeping the signal power within an ideal range.

At the same time, in the embodiment of the present invention, the digital signal processing method is adopted, and the signal power is adjusted with two different adjustment precisions, which is higher than the AGC circuit gain adjustment accuracy in the prior art, and the adjustment interval is more stable. Moreover, in the embodiment of the present invention, the frame signal is used as the adjustment basis, which can achieve real-time and fast adjustment effect, higher accuracy, more convenient platform transplantation, and more convenient use and maintenance.

Embodiment two

FIG. 5 provides a gain adjustment method according to an embodiment of the present invention, and the method may be applied to a circuit having the gain adjustment circuit shown in FIG. 2 and/or a device including the gain adjustment circuit. The method can be described as follows:

S11: Multiply the first frame signal of at least two frame signals included in the received input signal by the initial gain value to obtain a first frame gain signal corresponding to the first frame signal;

S12: Perform a first adjustment to the initial gain value according to the signal power of the first frame gain signal to obtain a first gain value, and multiply the first frame gain signal by the first gain value to obtain a second frame gain signal;

S13: Perform a second adjustment on the first gain value according to the signal power of the second frame gain signal to obtain an adjusted second gain value; wherein, the first adjusted adjustment value is greater than the second adjusted adjustment value, and the second gain The signal power corresponding to the value is within the power range allowed by the system;

S14: Determine the second gain value as an initial gain value of a second frame signal after the first frame signal among at least two frame signals.

In the embodiment of the present invention, the circuit system may divide the received input signal into multi-frame signals in frame form in S11, for example, adjust the input signal into an applicable serial form with a frame interval of 10 ms. Furthermore, a multiplier may be used to multiply the current first frame signal by an initial gain value, and the initial gain value may be an adjusted gain value in the last period.

In practical applications, after the first frame signal is multiplied by the initial gain value to obtain the first frame gain signal, the first frame gain signal can be output through a corresponding signal output module.

In S12, the initial gain value is roughly adjusted according to the signal power of the gain signal in the first frame, that is, an adjustment with a large power range is performed. For example, the first adjustment can increase or decrease the initial gain value by 200dB, corresponding to the signal power On, that is to increase or decrease the signal power by 3dB.

Specifically, the process of S12 may be to determine the first preset power range in which the signal power of the gain signal of the first frame is located, and determine the gain adjustment value corresponding to the first preset power range according to the correspondence between the power range and the gain adjustment value , and then adjust the initial gain value according to the gain adjustment value to obtain an adjusted first gain value. Wherein, for each preset power range and the corresponding adjusted signal power, please still refer to FIG. 4 and the corresponding description, which will not be repeated here.

That is to say, after determining the signal power of the gain signal in the first frame, the power range in which it is located can be determined by comparing the signal power with the power threshold value, and then according to the gain adjustment value corresponding to the power range, That is, the initial gain value can be adjusted so that the signal power corresponding to the first gain value obtained after the first adjustment is at or close to the rated power range, that is, the power range formed by the high power threshold 2 and the low power threshold in FIG. 4 .

In the embodiment of the present invention, the process of S13 may include the following processes:

(1) Divide the second frame gain signal into multiple subframe gain signals, and record the power signal corresponding to each subframe gain signal. For example, the 10ms second frame gain signal is divided into ten 1ms subframe gain signals, and the signal power of each subframe gain signal is recorded.

(2) Determine at least two subframe gain signals whose signal power is not within the second preset power range among the plurality of subframe gain signals; wherein, the power interval of the second preset power range is smaller than that of the first preset power range power range.

Wherein, the maximum value (or high power threshold) and minimum value (or low power threshold) of the second preset power range may be determined by the highest power value and the lowest power value allowed by normal signals, and the maximum and minimum The difference may be small, such as 1dB, that is, the power interval of the second preset power range may be 1dB, and the power interval of the first preset power range may be larger, such as 3dB. In the embodiment of the present invention, a signal whose signal power is within the second preset power range may be regarded as a normal signal.

The at least two subframe gain signals may be signals whose signal power is greater than the maximum value in the second preset power range and whose signal power is smaller than the minimum value in the second preset power range among the multiple subframe gain signals.

(3) Determine at least two sub-gain adjustment values corresponding to the at least two sub-frame gain signals according to the at least two sub-frame gain signals and the second preset power range.

Wherein, the at least two sub-gain adjustment values may be values with small adjustment ranges, that is, each self-gain adjustment value corresponds to a small range of adjusted signal power, such as 1dB or 0.5dB, and so on.

Specifically, when determining at least two sub-gain adjustment values, the magnitude relationship between the signal power of each sub-frame gain signal in the at least two sub-frame gain signals and the maximum value and minimum value of the second preset power range may be determined, if If it is determined that the signal power of the subframe gain signal is greater than the maximum value, then determine that the sub-gain adjustment value corresponding to the subframe gain signal is the first adjustment value, or if it is determined that the signal power of the subframe gain signal is less than the minimum value, then determine The sub-gain adjustment value corresponding to the sub-frame gain signal is a second adjustment value. Wherein, the first adjustment value can be used to increase the first gain value by a first preset value, and the second adjustment value can be used to decrease the first gain value by a second preset value, and the first preset value can be +100 (the corresponding signal power increases by 0.5dB), and the second preset value may be -100 (the corresponding signal power decreases by 0.5dB).

(4) Adjust the first gain value sequentially according to at least two sub-gain adjustment values to obtain a second gain value.

That is to say, the adjustment value corresponding to each sub-gain adjustment value in the at least two sub-gain adjustment values is determined, and the adjustment value is the determined first adjustment value or the second adjustment value, and then, according to all the determined adjustment value interface pairs The first gain value is adjusted to obtain an adjusted second gain value.

For example, the first adjustment modulation value is 800, if the signal power of 5 subframe gain signals among the 10 subframe gain signals of 1 ms is not within the second preset power range, the correspondingly determined sub-gain adjustment values are respectively -100 , -100, +100, -100 and +100, the second adjustment value obtained is 700 through the effects of these self-gain adjustment values.

Of course, in practical applications, when the gain value is finely adjusted based on the multiple subframe gain signals corresponding to the second frame gain signal, it may be performed in real time. That is, the signal power of each sub-frame gain signal is counted according to the receiving sequence, and compared with the threshold value of the preset power range, so as to determine the corresponding sub-adjustment gain value according to the comparison result, and based on the sub-adjustment gain value to adjust the gain value Make adjustments.

For example, the first adjusted gain value is 800, and the second frame gain signal corresponds to 3 subframe gain signals. If it is first determined that the sub-adjustment gain value corresponding to the first sub-frame gain signal is +100 (corresponding to a signal power increase of 0.5dB), the first gain value is increased by 100, and then, the sub-adjustment gain value corresponding to the second sub-frame gain signal is determined. The adjusted gain value is 0 (the signal power is within the second preset power range), then the first gain value remains unchanged on the basis of an increase of 100, and then, if the sub-adjusted gain value corresponding to the third sub-frame gain signal is determined If the value is -100 (corresponding to a 0.5dB decrease in signal power), then the first gain value is increased by 100 and then decreased by 100 to finally obtain a finely adjusted gain value of 800, which is the second gain value.

In the embodiment of the present invention, after the second gain value is determined in S13, the second gain value can be fed back to the next cycle, that is, it can be used as the initial gain value of the next frame signal.

Therefore, in the embodiment of the present invention, by adopting a digital signal processing method, two different adjustment precisions are used to adjust the signal power, that is, a large-scale coarse adjustment and a small-amplitude fine adjustment, so as to keep the signal power in the ideal range The technical effect within is higher than the accuracy of gain adjustment of the AGC circuit in the prior art, and the adjustment range is more stable. Moreover, the frame signal is used as the adjustment basis in the embodiment of the present invention, which can achieve real-time and fast adjustment effect, higher precision, more convenient platform transplantation, and more convenient use and maintenance.

Embodiment Three

In the embodiment of the present invention, a computer device is also provided, the structure of which is shown in FIG. The steps of the method for adjusting the gain provided in the second embodiment.

Optionally, the processor 31 may specifically be a central processing unit, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), may be one or more integrated circuits for controlling program execution, and may use a field programmable gate array ( The hardware circuit developed by Field Programmable Gate Array (FPGA) can be a baseband processor.

Optionally, the processor 31 may include at least one processing core.

Optionally, the electronic device further includes a memory 32, and the memory 32 may include a read only memory (Read Only Memory, ROM), a random access memory (Random Access Memory, RAM), and a disk memory. The memory 32 is used to store data required by the processor 31 during operation. The number of memory 32 is one or more.

Embodiment four

The embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and when the computer instructions are run on the computer, the method for adjusting the gain as provided in the second embodiment of the present invention can be realized. step.

In the embodiments of the present invention, it should be understood that the disclosed method and circuit for adjusting the gain may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

Each functional unit in the embodiment of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the technical solutions of the embodiments of the present invention can be embodied in the form of software products, the computer software products are stored in a storage medium, including several instructions to make a computer device, for example, can be A personal computer, a server, or a network device, etc., or a processor (Processor) executes all or part of the steps of the method in each embodiment of the present invention. The aforementioned storage media include: Universal Serial Bus flash drive (Universal Serial Bus flash drive, USB), removable hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), Various media that can store program codes, such as magnetic disks or optical disks.

The above embodiments are only used to describe the technical solutions of the present invention in detail, but the descriptions of the above embodiments are only used to help understand the methods of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Changes or substitutions that can be easily imagined by those skilled in the art should fall within the protection scope of the embodiments of the present invention.

Claims (13)

1. A kind of 1. method of adjust gain, it is characterised in that including：

   The first frame signal at least two frame signals included by the input signal of reception is multiplied with initial yield value, obtains institute State the corresponding first frame gain signal of the first frame signal；

   First adjustment carries out the initial yield value according to the signal power of the first frame gain signal, obtains the first gain Value, and the first frame gain signal is multiplied with first yield value, obtain the second frame gain signal；

   Second adjustment is carried out to first yield value according to the signal power of the second frame gain signal, after being adjusted Second yield value；Wherein, the adjusted value of first adjustment is more than the adjusted value of the second adjustment, and second yield value Corresponding signal power is in the power bracket of system permission；

   The second frame that second yield value is determined as at least two frame signals after first frame signal is believed Number initial yield value.
2. 2. the method as described in claim 1, it is characterised in that according to the signal power of the first gain frame signal to described Initial yield value carries out the first adjustment, obtains the first yield value, including：

   Determine the first predetermined power scope residing for the signal power of the first frame gain signal；

   According to the correspondence of power bracket and gain adjustment value, the corresponding Gain tuning of the first predetermined power scope is determined Value；

   The initial yield value is adjusted according to the gain adjustment value, the first yield value after being adjusted.
3. 3. method as claimed in claim 2, it is characterised in that according to the signal power of the second frame gain signal to described First yield value progress second adjustment, the second yield value after being adjusted, including：

   The second frame gain signal is divided into multiple sub-frame gains signals, records the corresponding power of each sub-frame gains signal Signal；

   Determine that signal power is not at least two subframes in the range of the second predetermined power in the multiple sub-frame gains signal Gain signal；Wherein, the power interval of the second predetermined power scope is less than the power area of the first predetermined power scope Between；

   According at least two sub-frame gains signal and the second predetermined power scope, determine that at least two subframe increases The corresponding at least two sub- gain adjustment value of beneficial signal；

   First yield value is adjusted successively according to described at least two sub- gain adjustment values, obtains the second yield value.
4. 4. method as claimed in claim 3, it is characterised in that according at least two sub-frame gains signal and described second Predetermined power scope, determines the corresponding at least two sub- gain adjustment value of at least two sub-frame gains signal, including：

   Determine the signal power of each sub-frame gains signal and the described second default work(at least two sub-frame gains signal Magnitude relationship between the maximum and minimum value of rate scope；

   If it is determined that the signal power of sub-frame gains signal is more than the maximum, it is determined that the corresponding sub- increasing of the sub-frame gains signal Beneficial adjusted value is the first adjusted value, or, however, it is determined that the signal power of sub-frame gains signal is less than the minimum value, it is determined that should The corresponding sub- gain adjustment value of sub-frame gains signal is second adjustment value；

   Wherein, first adjusted value is used to first yield value increasing the first preset value, and the second adjustment value is used for First yield value is reduced into the second preset value.
5. 5. method as claimed in claim 4, it is characterised in that according to described at least two sub- gain adjustment values successively to described First yield value is adjusted, and obtains the second yield value, including：

   Determine the corresponding adjusted value of every sub- gain adjustment value in described at least two sub- gain adjustment values, the adjusted value is institute State the first adjusted value or the second adjustment value；

   First yield value is adjusted according to definite whole adjusted values, the second yield value after being adjusted.
6. A kind of 6. circuit of adjust gain, it is characterised in that including：

   Signal receiving module, at least two frame signals are divided into for receiving input signal, and by the input signal；

   First signal gain module, for the first frame signal at least two frame signals to be multiplied with initial yield value, is obtained Obtain the corresponding first frame gain signal of first frame signal；

   First adjustment module, is connected with the first signal gain module, for the signal according to the first frame gain signal Power carries out the initial yield value the first adjustment, obtains the first yield value；

   Secondary signal gain module, is connected with the first signal gain module and the first adjustment module, for inciting somebody to action respectively The first frame gain signal is multiplied with first yield value, obtains the second frame gain signal；

   Second adjustment module, is connected with the secondary signal gain module, for the signal according to the second frame gain signal Power is to first yield value progress second adjustment, the second yield value after being adjusted, and second yield value is anti- Feed the first signal gain module, the initial yield value using second yield value as next frame signal；Wherein, institute The adjusted value for stating the first adjustment is more than the adjusted value of the second adjustment, and the corresponding signal power of second yield value, which is in, is Unite in the power bracket allowed.
7. 7. circuit as claimed in claim 6, it is characterised in that the circuit further includes：

   Signal output module, is connected with the first signal gain module, for exporting the first signal gain resume module Signal afterwards.
8. 8. circuit as claimed in claim 7, it is characterised in that the first adjustment module includes：

   First power statistic module, for recording the signal power of currently received first frame gain signal；

   First power comparison module, for will in the signal power of the first frame gain signal and multiple predetermined power scopes it is every The corresponding power bracket of a power bracket scope is compared, and determines residing for the signal power of the first frame gain signal One predetermined power scope；

   First gain regulation module, for the correspondence according to power bracket and gain adjustment value, determines that the first frame gain is believed Number the corresponding gain adjustment value of signal power, and the initial yield value is adjusted according to the gain adjustment value, obtained Obtain the first yield value.
9. 9. circuit as claimed in claim 8, it is characterised in that the second adjustment module includes：

   Second power statistic module, for the second frame gain signal of reception to be divided into multiple sub-frame gains signals, and Record the corresponding power signal of each sub-frame gains signal；

   Second power comparison module, for by the maximum of the signal power of each sub-frame gains signal and the second predetermined power scope Value and minimum value are compared, and determine that signal power is not in the range of the second predetermined power in the multiple sub-frame gains signal At least two sub-frame gains signals；Wherein, the power interval of the second predetermined power scope is less than the described first default work( The power interval of rate scope；

   Second gain regulation module, for according at least two sub-frame gains signal and the second predetermined power scope, Determine the corresponding at least two sub- gain adjustment value of at least two sub-frame gains signal, and increase according to described at least two sons Beneficial adjusted value is successively adjusted first yield value, obtains the second yield value.
10. 10. circuit as claimed in claim 9, it is characterised in that the second power comparison module is used for：

    Determine the signal power of each sub-frame gains signal and the described second default work(at least two sub-frame gains signal Magnitude relationship between the maximum and minimum value of rate scope；

    If it is determined that the signal power of sub-frame gains signal is more than the maximum, it is determined that the corresponding sub- increasing of the sub-frame gains signal Beneficial adjusted value is the first adjusted value, or, however, it is determined that the signal power of sub-frame gains signal is less than the minimum value, it is determined that should The corresponding sub- gain adjustment value of sub-frame gains signal is second adjustment value；

    Wherein, first adjusted value is used to first yield value increasing the first preset value, and the second adjustment value is used for First yield value is reduced into the second preset value.
11. 11. circuit as claimed in claim 10, it is characterised in that second gain regulation module is used for：

    Determine the corresponding adjusted value of every sub- gain adjustment value in described at least two sub- gain adjustment values, and according to definite complete The adjusted value in portion is adjusted first yield value, the second yield value after being adjusted；Wherein, the adjusted value is institute State the first adjusted value or the second adjustment value.
12. 12. a kind of computer installation, including memory, processor and it is stored on the memory and can be on the processor The computer program of operation, it is characterised in that the processor realizes claim 1 to 5 times when performing the computer program The step of one claim the method.
13. 13. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program The step of claim 1 to 5 any claim the method is realized when being executed by processor.