CN-121984463-A - Pulse delay automatic gain control method

CN121984463ACN 121984463 ACN121984463 ACN 121984463ACN-121984463-A

Abstract

The invention relates to a pulse delay automatic gain control method, which comprises the steps of determining attenuation initial values under each power configuration after starting according to self-checking signals and current environment temperature, detecting input radio frequency signals and output radio frequency signals in real time in a detection channel, reading peak values, judging signal amplitude, reading the attenuation initial values under the current input signals of the current environment temperature, calculating theoretical optimal gain values according to the detected output signal amplitude and expected target output amplitude, preferentially using the values to control power, detecting whether the pulse signals arrive or not, calculating new gain control values according to the relation among attenuator characteristics, voltage and power after the current pulse signals are ended or after the maximum signal period, amplifying or attenuating the output signals by adopting the new gain control values, and outputting signals with stable amplitude. The invention realizes the rapid and distortion-free gain control of the pulse signal.

Inventors

ZHOU CHENG
Hou Bengong
LUO XIAOFEI
LIN ZHAO
LI SICONG
LI WENCAI
LI BIAO
CHEN FULIANG

Assignees

航天恒星科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251229

Claims (10)

1. The pulse delay automatic gain control method is characterized by comprising the following steps of: Simulating a real use environment, and configuring and storing attenuation initial value tables under each temperature environment and each input power; Waiting for receiving a self-checking signal, searching an attenuation initial value table according to the self-checking signal and the current environment temperature, and determining an attenuation initial value of each power configuration after the terminal is started; In the detection channel, an amplitude detector is used for detecting an input radio frequency signal and an output radio frequency signal in real time, reading peaks of the input radio frequency signal and the output radio frequency signal, and judging the amplitudes of the input signal and the output signal; Waiting for a power control instruction, reading an attenuation initial value of a current input signal of the current ambient temperature, and calculating a theoretical optimal gain value according to the read attenuation initial value, the detected output signal amplitude and the expected target output amplitude, wherein the theoretical optimal gain value is used for power control preferentially after the terminal is electrified; Detecting whether a pulse signal arrives, if the difference between the current power and the target power exceeds an error threshold value, calculating a required new gain control value according to the relation among the characteristics of the attenuator, the voltage and the power after the current pulse signal is ended or after the longest signal period, amplifying or attenuating an output signal by adopting the new gain control value, and outputting a signal with stable amplitude, otherwise, keeping using a theoretical optimal gain value to continue power control.
2. The method of claim 1, wherein the peak reading is performed on the input rf signal and the output rf signal, and the reading period is generally one pulse width.
3. The method of claim 1, wherein the determining the amplitudes of the input and output signals, the signal amplitudes being the average of the currently detected multi-point peaks, uses three sets of data to average, reduces the data fluctuations and increases the stability of the rf output.
4. The method of claim 1, wherein the amplitude detector detects the undelayed input radio frequency signal and the undelayed output radio frequency signal in real time, and determines that the pulse is coming once the detected signal amplitude exceeds a preset trigger threshold, and determines that the pulse is finished when the detected signal amplitude is lower than a release threshold and lasts for a certain time.
5. A method of pulse delay automatic gain control according to claim 1, characterized in that the gain control value is allowed to be continuously fine-tuned during the pulse duration or the amount of attenuation is kept constant during the pulse application.
6. The method for controlling pulse delay automatic gain according to claim 1, wherein it is determined whether the calculated new gain control value is greater than a certain unit, if the signal amplitude to be adjusted is too large, the single adjustment is not greater than the maximum adjustment amplitude, and the adjustment of at most 10 units is ensured.
7. The method of claim 1, wherein calculating the new gain control value according to the attenuator characteristic, the voltage and the power relation comprises: Wherein, the In order to add the control value of the new benefit, For a theoretical optimum gain value, And The output voltage and the output power are respectively referred to, And The input voltage and the input power are respectively, And Voltage gain factor and power gain factor, respectively, allow Or (b) One of which takes a value of 0.
8. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor performs the steps of the method according to any one of claims 1 to 7.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1-7 when executing the computer program.
10. A computer program product comprising a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 7.

Description

Pulse delay automatic gain control method Technical Field The invention belongs to the technical fields of communication technology, radar signal processing and electronic countermeasure, and relates to a pulse delay automatic gain control method. Background An Automatic Gain Control (AGC) is a key module in a receiver, and is used for maintaining the amplitude of an output signal within a certain range under the condition that the dynamic range of the intensity of an input signal is large, so as to ensure the effectiveness of subsequent signal processing (such as analog-to-digital conversion, demodulation and the like). The current AGC technology focuses on the optimization design of hardware circuits, algorithm convergence and the like, so that the improvement of the performance of AGC in terms of system modulation precision, dynamic range, algorithm speed and the like is realized, for example, an AGC automatic gain control stabilizing circuit in patent literature, an automatic gain control loop for AGC gain control in patent literature and the like. However, current AGC techniques suffer from significant drawbacks when faced with Burst (Burst) or pulsed signals: (1) Leading edge distortion problems-useful information of a pulse signal tends to concentrate on the leading edge of the signal (e.g., the pulse header), and conventional AGC cannot provide the correct gain at the first time, resulting in distortion of critical information. (2) Overshoot and undershoot problems-to increase loop bandwidth in pursuit of fast response, gain adjustment overshoot (Overshoot) or undershoot (Undershoot) is easily caused, resulting in fluctuation of signal envelope, and adverse to subsequent processing. Accordingly, there is an urgent need for an Automatic Gain Control (AGC) method capable of responding to an impulse signal, effectively protecting a signal front and realizing stable amplitude control. Disclosure of Invention Aiming at the problems of front edge distortion, slow locking period, overshoot and undershoot in the prior art, the invention provides a pulse delay automatic gain control method which realizes the rapid and distortion-free gain control of pulse signals by combining delay processing with prejudgement gain calculation. The invention solves the technical problems by adopting a pulse delay automatic gain control method, which comprises the following steps: Simulating a real use environment, and configuring and storing attenuation initial value tables under each temperature environment and each input power; Waiting for receiving a self-checking signal, searching an attenuation initial value table according to the self-checking signal and the current environment temperature, and determining an attenuation initial value of each power configuration after the terminal is started; In the detection channel, an amplitude detector is used for detecting an input radio frequency signal and an output radio frequency signal in real time, reading peaks of the input radio frequency signal and the output radio frequency signal, and judging the amplitudes of the input signal and the output signal; Waiting for a power control instruction, reading an attenuation initial value of a current input signal of the current ambient temperature, and calculating a theoretical optimal gain value according to the read attenuation initial value, the detected output signal amplitude and the expected target output amplitude, wherein the theoretical optimal gain value is used for power control preferentially after the terminal is electrified; Detecting whether a pulse signal arrives, if the difference between the current power and the target power exceeds an error threshold value, calculating a required new gain control value according to the relation among the characteristics of the attenuator, the voltage and the power after the current pulse signal is ended or after the longest signal period, amplifying or attenuating an output signal by adopting the new gain control value, and outputting a signal with stable amplitude, otherwise, keeping using a theoretical optimal gain value to continue power control. Further, the peak reading is performed on the input rf signal and the output rf signal, and the reading period is usually one pulse width. Further, the amplitude of the input signal and the amplitude of the output signal are judged, the signal amplitude is the average value of the currently detected multipoint peak values, the three groups of data are used for averaging, and the fluctuation of the data is reduced to increase the stability of the radio frequency output. Further, the amplitude detector detects the input radio frequency signal and the output radio frequency signal without delay in real time, and determines that the pulse arrives once the detected signal amplitude exceeds a preset trigger threshold, and determines that the pulse ends after the detected signal amplitude is lower than a release threshold and lasts for a ce