Self-adaptive TACAN signal generation device and method

Abstract

The invention discloses a self-adaptive TACAN signal generation device and method, and relates to the technical field of TACAN signal debugging. The device comprises a pre-amplifier, a first isolator, a final-stage power amplifier PA, a second isolator, a coupler, a processor and a grid voltage generation circuit, the device further comprises a digital potentiometer and a signal feedback circuit. The device obtains the current pulse waveform collected by the ADC based on the signal feedback circuit, compares the current pulse waveform with the TACAN waveform, and continuously and automatically adjusts the output voltage of the digital potentiometer and the output signal amplitude of the grid voltage generation circuit until the output pulse waveform meets the TACAN waveform requirement. According to the invention, the problems of insufficient control precision, large modulation workload and heavy man-made subjective factors in the existing method are solved; meanwhile, the signal feedback circuit can also be used as a detection circuit for generating the health state of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of TACAN signal debugging, and particularly relates to an adaptive TACAN signal generating device and method. Background Art

[0002] TACAN is the abbreviation of Tactical Air Navigation, and it is the world's first system to provide both azimuth and distance information for aircraft. The TACAN system consists of a ground station and airborne equipment, and is a pulse system operating at 960 MHz to 1215 MHz. The waveform of the TACAN system adopts a standard Gaussian pulse waveform. As Figure 1 shown, most current TACAN transmitting devices are realized by modulating the final-stage high-power amplifier, and the transmitting power ranges from hundreds of watts to kilowatts.

[0003] Due to the individual differences of high-power amplifier tubes, traditional generation methods have disadvantages such as waveform distortion, being greatly affected by temperature drift, and large debugging workload. In order to ensure that the output waveform meets the standard, it is necessary to continuously adjust the grid voltage amplitude of the final-stage amplifier tube.

[0004] As Figure 2 shown, Figure 2 is a schematic diagram of a conventional TACAN signal transmitting device. The debugging and calibration method based on this transmitting device is divided into the following steps: 1) Taking frequency and temperature as variables, according to the output waveform of the transmitting device, change the compensation attenuation value (adjust the input power of the final-stage amplifier) and the grid voltage amplitude of the final-stage amplifier in the transmitting device.

[0005] 2) Manually read whether the output waveform of the transmitting device meets the TACAN standard requirements. If the waveform does not meet the requirements, repeat step 1); if it meets the requirements, write the adjusted value into the memory.

[0006] 3) Change the frequency and temperature, and repeat steps 1) and 2), covering all frequency points and temperatures.

[0007] 4) During normal operation, according to the frequency and temperature, read the adjusted value in the memory to make the transmitted output satisfy the pulse waveform required by the TACAN standard.

[0008] The above method has insufficient control accuracy (the control accuracy of the attenuator is generally 0.5 dB), a large debugging workload, and strong human subjective factors. There are often problems such as incomplete coverage of the adjusted values and a certain deviation between the final output waveform and the ideal waveform.

[0009] In view of this, this application is specifically proposed. Summary of the Invention

[0010] The object of the present invention is to provide an adaptive TACAN signal generation device and method. On the basis of the original circuit, the preamplification link is optimized, and a signal feedback circuit is added, which can realize the detection and adaptive adjustment of high-power output waveforms. The present invention solves the problems of insufficient control accuracy, large modulation workload, and heavy human subjective factors in the existing methods; at the same time, the signal feedback circuit can also be used as a detection circuit for the health status of the generation device.

[0011] The present invention is realized through the following technical solutions: In a first aspect, the present invention provides an adaptive TACAN signal generation device, which includes a preamplifier, a first isolator, a final power amplifier PA, a second isolator, a coupler, a processor, and a grid voltage generation circuit. The preamplifier, the first isolator, the final power amplifier PA, the second isolator, and the coupler are connected in sequence; the processor is connected to the grid voltage generation circuit, and the grid voltage generation circuit is connected to the grid of the final power amplifier PA; It further includes a digital potentiometer, one end of the digital potentiometer is connected to the processor, and the other end is connected to the preamplifier; It further includes a signal feedback circuit, one end of the signal feedback circuit is connected to the coupler, and the other end is connected to the processor; The device obtains the current pulse waveform sampled by the ADC based on the signal feedback circuit, compares the current pulse waveform with the TACAN waveform, and continuously and automatically adjusts the output voltage of the digital potentiometer and the output signal amplitude of the grid voltage generation circuit until the output pulse waveform meets the requirements of the TACAN waveform; wherein, the TACAN waveform is a standard Gaussian pulse waveform.

[0012] Furthermore, the device further includes a memory, the memory is connected to the processor, and is used to store the adjustment values that meet the requirements of the TACAN waveform, and during normal operation, the processor can call the adjustment values.

[0013] Furthermore, the signal feedback circuit includes an analog-to-digital converter ADC and a detector. One end of the detector is connected to the output end of the coupler, the other end is connected to the analog-to-digital converter ADC, and the analog-to-digital converter ADC is connected to the processor.

[0014] Furthermore, the grid voltage generation circuit includes a digital-to-analog converter DAC and an operational amplifier. One end of the digital-to-analog converter DAC is connected to the processor, the other end is connected to the operational amplifier, and the operational amplifier is connected to the grid of the final power amplifier PA.

[0015] In a second aspect, the present invention further provides an adaptive TACAN signal generation method, which is based on the above-mentioned adaptive TACAN signal generation device, and the method includes: S1: The processor initializes the control signal to obtain the initial control signal; the initial control signal includes the digital potentiometer output voltage configuration data and the DAC data of the gate voltage generation circuit; S2: The processor obtains the pulse waveform sampled by the ADC from the signal feedback circuit, and based on the pulse waveform sampled by the ADC, performs multiple averaging to generate the pulse power amplitude corresponding to the final-stage power amplifier PA; S3: Determine whether the pulse power amplitude meets the requirements. If the pulse power amplitude does not meet the requirements, adjust the digital potentiometer output voltage; S4: If the pulse power amplitude meets the requirements, maintain the current digital potentiometer output voltage, and use the three-segment method to calculate and generate a set of DAC data, and successively determine whether the pulse width, rising edge, and falling edge of the device output signal meet the requirements based on the pulse waveform sampled by the ADC and perform gate voltage adjustment; S5: Store the digital potentiometer output voltage and DAC data that meet the requirements in the memory according to the current temperature and frequency; S6: By changing the frequency and / or temperature, repeat the above steps S1 to S5 to traverse all frequency segments and / or temperature segments; S7: When powered on and working, retrieve the data in the corresponding memory according to the frequency and / or temperature.

[0016] Further, step S1 includes: The processor controls the digital potentiometer to generate the output voltage of the digital potentiometer; Meanwhile, the processor controls the gate voltage generation circuit to generate DAC data with a pulse width of a preset pulse width value.

[0017] The above technical solution adaptively adjusts the output waveform of the power pulse without manual intervention.

[0018] Further, adjusting the output voltage of the digital potentiometer in step S3 includes: According to the current pulse power amplitude, increase or decrease the digital potentiometer output voltage in a preset step; Repeat steps S1 to S3. When the pulse power amplitude of the final-stage power amplifier PA meets the requirements, record the adjustment value of the current digital potentiometer.

[0019] Further, using the three-segment method to calculate and generate a set of DAC data in step S4, and successively determining whether the pulse width, rising edge, and falling edge of the device output signal meet the requirements based on the pulse waveform sampled by the ADC and performing gate voltage adjustment includes: A: The processor calculates and generates a set of DAC data using a three - stage method according to the standard waveform signal formula; the first - stage data in the three - stage method is the duration of the half - power value from the start of the signal to the rising edge, that is, from 0 - 0.5a (rising edge), where a is the peak power of the output pulse signal, and the first standard deviation is , which is used to adjust the rising edge of the output pulse; the second - stage data is the duration from the half - power value of the rising edge to the half - power value of the falling edge, that is, from 0.5a (rising edge of the output pulse) - 0.5a (falling edge of the output pulse), and the second standard deviation is , which is used to adjust the pulse width; the third - stage data is the duration from the half - power value of the falling edge to the end of the signal, that is, from 0.5a - 0 (falling edge), where a is the peak power of the output pulse signal, and the third standard deviation is , which is used to adjust the falling edge of the output pulse; B: According to the pulse waveform collected by the ADC, determine whether the pulse width of the device output signal meets the first preset value; if not, change the magnitude of the second standard deviation in the standard waveform signal formula until the pulse width of the device output signal meets the first preset value, and record the DAC data of the current second - stage data; C: According to the pulse waveform collected by the ADC, determine whether the rising edge (the time required for the peak power to reach 10% - 90%) of the device output signal meets the second preset value; if not, change the magnitude of the first standard deviation in the standard waveform signal formula to adjust the rising - edge time until the rising edge of the device output signal meets the second preset value, and record the DAC data of the current first - stage data; D: According to the pulse waveform collected by the ADC, determine whether the falling edge (the time required for the peak power to reach 90% - 10%) of the device output signal meets the third preset value; if not, change the magnitude of the third standard deviation in the standard waveform signal formula to adjust the falling - edge time until the falling edge of the device output signal meets the third preset value, and record the DAC data of the current third - stage data; E: Generate a set of DAC data according to the DAC data of the current second - stage data, the DAC data of the current first - stage data, and the DAC data of the current third - stage data.

[0020] Further, the standard waveform signal formula is: ; Where, represents the value of the signal at time t ; is the amplitude, that is, the maximum value of the signal; is the base of the natural logarithm; is the time; is the center position, that is, the t value corresponding to when the signal reaches the maximum value; is the standard deviation, which determines the width of the signal.

[0021] Further, the first preset value is 3.5us ± 0.5us; the second preset value is 2.5us; the third preset value is 3us.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects: An adaptive TACAN signal generation device and method of the present invention optimizes the preamplification link and adds a signal feedback circuit on the basis of the original circuit, and can realize the detection and adaptive adjustment of high-power output waveforms. The present invention solves the problems of insufficient control accuracy, large modulation workload, and heavy human subjective factors in the existing methods; at the same time, the signal feedback circuit can also be used as a detection circuit for the health status of the generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings: Figure 1 is a standard Gaussian pulse waveform; Figure 2 is a schematic diagram of a conventional TACAN signal transmitting device; Figure 3 is a schematic diagram of an adaptive TACAN signal generation device of the present invention; Figure 4 is a flowchart of an adaptive TACAN signal generation method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In the following, the term "comprising" or "may comprise" that may be used in various embodiments of the present invention indicates the presence of the functions, operations, or elements of the present invention, and does not limit the addition of one or more functions, operations, or elements. Further, as used in various embodiments of the present invention, the terms "comprising", "having" and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing items, and should not be construed as precluding the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0025] In various embodiments of the present invention, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0026] Expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0027] It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. On the contrary, when one constituent element is "directly connected" to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.

[0028] The terms used in the various embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the various embodiments of the present invention pertain. The terms (such as those defined in a commonly used dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present invention.

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments and descriptions of the present invention are only for explaining the present invention and do not serve as a limitation to the present invention.

[0030] Most current transmitting devices are implemented using the final-stage PA modulation method. The Gaussian pulse output waveform of the transmitting device is related to the RF input power, the output power of the preamplifier, and the PA gate voltage. The input range nominal value (i.e., the small-signal input for excitation) is generally within ±3 dB. The present invention controls the power input range of the final-stage power amplifier by adjusting the output voltage of the digital potentiometer to change the amplification factor of the preamplifier. The final-stage power amplifier PA generally selects a GaN amplifier in the kilowatt range, and the final output waveform is adjusted by controlling its gate voltage waveform to output a high-power signal.

[0031] The core of the present invention is to obtain the final output pulse waveform sampled back by the ADC based on the signal feedback circuit, find the deviation from the standard waveform, and control the output voltage of the digital potentiometer (as a variable voltage divider circuit) and the gate voltage amplitude of the final power amplifier PA, so that the high-power output signal of the device meets the requirements of Gaussian pulses.

[0032] Embodiment 1 As Figure 3 shown, Figure 3 is a schematic diagram of an adaptive TACAN signal generating device of the present invention; An adaptive TACAN signal generating device of the present invention includes a preamplifier, a first isolator, a final power amplifier PA, a second isolator, a coupler, a processor, and a gate voltage generating circuit. The preamplifier, the first isolator, the final power amplifier PA, the second isolator, and the coupler are connected in sequence; the processor is connected to the gate voltage generating circuit, and the gate voltage generating circuit is connected to the gate of the final power amplifier PA; It further includes a digital potentiometer, one end of the digital potentiometer is connected to the processor, and the other end is connected to the preamplifier; It further includes a signal feedback circuit, one end of the signal feedback circuit is connected to the coupler, and the other end is connected to the processor; It further includes a memory, the memory is connected to the processor, and is used to store the adjustment values that meet the TACAN waveform requirements, and during normal operation, the processor can call the adjustment values; wherein, the TACAN waveform is a standard Gaussian pulse waveform.

[0033] The device obtains the current pulse waveform sampled back by the ADC based on the signal feedback circuit, compares the current pulse waveform with the TACAN waveform, and continuously and automatically adjusts the output voltage of the digital potentiometer and the output signal amplitude of the DAC in the gate voltage generating circuit until the output pulse waveform meets the TACAN waveform requirements, and stores the adjustment values that meet the TACAN waveform requirements in the memory. During normal operation, the processor can call the adjustment values in the memory.

[0034] In this embodiment, the signal feedback circuit includes an analog-to-digital converter ADC and a detector. One end of the detector is connected to the output end of the coupler, and the other end is connected to the analog-to-digital converter ADC, and the analog-to-digital converter ADC is connected to the processor. Specifically, the detector is used to perform detection processing on the analog signal output by the coupler to obtain the detected voltage signal; the analog-to-digital converter ADC is used to perform analog-to-digital conversion on the detected voltage signal, that is, to obtain the current pulse waveform sampled back by the ADC.

[0035] In this embodiment, the gate voltage generation circuit includes a digital-to-analog converter (DAC) and an operational amplifier PB. One end of the DAC is connected to the processor, and the other end is connected to the operational amplifier PB. The operational amplifier PB is connected to the gate of the final power amplifier PA. Specifically, the gate voltage generation circuit is the same as that in the conventional TACAN signal transmitting device, and will not be elaborated here one by one.

[0036] In this embodiment, a temperature sensor is also provided near the final power amplifier PA, and the temperature sensor is connected to the processor.

[0037] Based on the original circuit, the present invention optimizes the preamplification link and adds a signal feedback circuit, which can realize the index detection and adaptive adjustment of the high-power output waveform. Specifically, by continuously comparing the difference between the current output pulse waveform of the coupler and the standard Gaussian pulse waveform, the output voltage of the digital potentiometer and the output signal amplitude of the DAC in the gate voltage generation circuit are automatically adjusted until the output pulse waveform (i.e., the high-power signal output) meets the TACAN waveform requirements.

[0038] Embodiment 2 As Figure 4 shown, Figure 4 is a flowchart of an adaptive TACAN signal generation method of the present invention; the difference between this embodiment and Embodiment 1 is that this embodiment provides an adaptive TACAN signal generation method, which is based on the adaptive TACAN signal generation device of Embodiment 1. The method includes: S1: The processor initializes the control signal to obtain an initial control signal; the initial control signal includes the digital potentiometer output voltage configuration data and the DAC data of the gate voltage generation circuit; Specifically, step S1 includes: The processor controls the digital potentiometer to generate a digital potentiometer output voltage; At the same time, the processor controls the gate voltage generation circuit to generate DAC data with a pulse width of a preset pulse width value.

[0039] In this embodiment, the processor controls the digital potentiometer to generate a digital potentiometer output voltage of +5V (the recommended power supply voltage for the preamplifier), and controls the gate voltage generation circuit to generate DAC data of 0xFFF with a pulse width of 6us (duty cycle 1%) (the DAC data is 0x000 at other times).

[0040] S2: The processor obtains the pulse waveform sampled by the ADC from the signal feedback circuit, and generates the pulse power amplitude corresponding to the final power amplifier PA through multiple averaging according to the pulse waveform sampled by the ADC; S3: Determine whether the pulse power amplitude meets the requirements. If the pulse power amplitude does not meet the requirements, adjust the digital potentiometer output voltage; In this embodiment, adjusting the output voltage of the digital potentiometer in step S3 includes: According to the current pulse power amplitude, increasing or decreasing the output voltage of the digital potentiometer in steps of 0.1V (the minimum resolution of the digital potentiometer is 5.5V / 1024≈0.005V); Repeat steps S1 to S3. When the pulse power amplitude of the final power amplifier PA meets the requirements, record the adjustment value of the current digital potentiometer.

[0041] S4: If the pulse power amplitude meets the requirements, keep the current output voltage of the digital potentiometer, and use the three-segment method to calculate and generate a set of DAC data. Then, successively determine whether the pulse width, rising edge, and falling edge of the output signal of the device meet the requirements according to the pulse waveform collected by the ADC, and perform grid voltage adjustment; In this embodiment, step S4 includes: A: The processor calculates and generates a set of DAC data using the three-segment method according to the standard waveform signal formula, and the output voltage of the digital potentiometer remains unchanged; as Figure 1 shown, the first segment of data in the three-segment method is the duration of the half-power value from the start of the signal to the rising edge, that is, from 0 - 0.5a (rising edge), where a is the peak power of the output pulse signal, and the first standard deviation is and is used to adjust the rising edge of the output pulse; the second segment of data is the duration from the half-power value of the rising edge to the half-power value of the falling edge, that is, from 0.5a (output pulse rising edge) - 0.5a (output pulse falling edge), and the second standard deviation is and is used to adjust the pulse width; the third segment of data is the duration from the half-power value of the falling edge to the end of the signal, that is, from 0.5a - 0 (falling edge), where a is the peak power of the output pulse signal, and the third standard deviation is and is used to adjust the falling edge of the output pulse; Specifically, the standard waveform signal formula is: ; where represents the value of the signal at time t ; is the amplitude, that is, the maximum value of the signal; is the base of the natural logarithm; is the time; is the center position, that is, the t value corresponding to when the signal reaches the maximum value; is the standard deviation, which determines the width of the signal.

[0042] B: Determine whether the pulse width of the device output signal meets the first preset value according to the pulse waveform collected by the ADC. The first preset value is 3.5us ± 0.5us. If it does not meet the requirement, change the second standard deviation in the standard waveform signal formula. The larger the , the larger the pulse width. The smaller the , the narrower the pulse. Until the pulse width of the device output signal meets the first preset value, and record the DAC data of the current second segment of data. C: Determine whether the rising edge of the device output signal meets the second preset value according to the pulse waveform collected by the ADC. The second preset value is 2.5us. If it does not meet the requirement, change the first standard deviation in the standard waveform signal formula. Adjust the time of the rising edge until the rising edge of the device output signal meets the second preset value, and record the DAC data of the current first segment of data. D: Determine whether the falling edge of the device output signal meets the third preset value according to the pulse waveform collected by the ADC. The third preset value is 3us. If it does not meet the requirement, change the third standard deviation in the standard waveform signal formula. Adjust the time of the falling edge until the falling edge of the device output signal meets the third preset value, and record the DAC data of the current third segment of data.

[0043] S5: According to the current temperature and frequency, store the digital potentiometer output voltage and DAC data that meet the requirements in the memory. For example, it can be stored in the corresponding address of the FLASH. S6: By changing the frequency and / or temperature, repeat the above steps S1 to S5 to traverse all frequency segments and / or temperature segments. In this embodiment, (1) change the frequency point, repeat steps S1 to S5 to traverse all frequency bands (10MHz is one frequency band). (2) Change the temperature, repeat steps S1 to S5 to traverse all temperature segments (10°C is one temperature segment).

[0044] S7: When powering on and working, retrieve the data in the corresponding memory according to the current frequency and / or temperature.

[0045] For the above technical solutions, an adaptive TACAN signal generation method can automatically compare the difference between the output pulse waveform and the standard Gaussian pulse waveform, dynamically adjust the state of the device, and perform precise secondary adjustment according to the advantages and disadvantages of the output waveforms before and after adjustment, thereby accelerating the debugging progress. This method enables fully automated debugging, reduces the debugging workload, and maximally avoids the interference of human factors.

[0046] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adaptive TACAN signal generating device, characterized in that: The device comprises a preamplifier, a first isolator, a final power amplifier PA, a second isolator, a coupler, a processor and a gate voltage generating circuit, wherein the preamplifier, the first isolator, the final power amplifier PA, the second isolator and the coupler are connected in sequence; the processor is connected to the gate voltage generating circuit, and the gate voltage generating circuit is connected to the gate of the final power amplifier PA; It also includes a digital potentiometer, one end of which is connected to the processor and the other end of which is connected to the preamplifier; It also includes a signal feedback circuit, one end of which is connected to the coupler and the other end of which is connected to the processor; The device obtains the current pulse waveform collected by the ADC based on a signal feedback circuit, compares the current pulse waveform with the TACAN waveform, and continuously and automatically adjusts the output voltage of the digital potentiometer and the output signal amplitude of the gate voltage generating circuit until the output pulse waveform meets the TACAN waveform requirements; wherein the TACAN waveform is a standard Gaussian pulse waveform.

2. The adaptive TACAN signal generating device according to claim 1, characterized in that: The device also includes a memory, which is connected to the processor and is used to store adjustment values ​​that meet the TACAN waveform requirements. When working normally, the processor can call the adjustment values.

3. The adaptive TACAN signal generating device according to claim 1, characterized in that: The signal feedback circuit comprises an analog-to-digital converter ADC and a detector. One end of the detector is connected to the output end of the coupler and the other end is connected to the analog-to-digital converter ADC. The analog-to-digital converter ADC is connected to the processor.

4. The adaptive TACAN signal generating device according to claim 1, characterized in that: The gate voltage generating circuit comprises a digital-to-analog converter DAC and an operational amplifier. One end of the digital-to-analog converter DAC is connected to the processor, and the other end is connected to the operational amplifier. The operational amplifier is connected to the gate of the final-stage power amplifier PA.

5. An adaptive TACAN signal generation method, characterized in that: The method includes: S1: The processor initializes the control signal to obtain an initial control signal; the initial control signal includes the output voltage configuration data of the digital potentiometer and the DAC data of the gate voltage generating circuit; S2: The processor obtains the pulse waveform sampled by the ADC from the signal feedback circuit, and performs multiple averaging based on the pulse waveform sampled by the ADC to generate the pulse power amplitude of the corresponding final-stage power amplifier PA; S3: judging whether the pulse power amplitude meets the requirement, if the pulse power amplitude does not meet the requirement, adjusting the output voltage of the digital potentiometer; S4: If the pulse power amplitude meets the requirements, the current output voltage of the digital potentiometer is maintained, and a set of DAC data is calculated by the three-segment method, and the pulse width, rising edge, and falling edge of the device output signal are judged in turn according to the pulse waveform collected by the ADC to see whether they meet the requirements and the gate voltage is adjusted; S5: According to the current temperature and frequency, the digital potentiometer output voltage and DAC data that meet the requirements are stored in the memory; S6: Repeat the above steps S1 to S5 to traverse all frequency segments and / or temperature segments by changing the frequency and / or temperature; S7: When powered on, the data in the corresponding memory can be retrieved according to the frequency and / or temperature.

6. The adaptive TACAN signal generation method according to claim 5, characterized in that: Step S1 includes: The processor controls the digital potentiometer to generate a digital potentiometer output voltage; At the same time, the processor controls the gate voltage generating circuit to generate DAC data with a pulse width equal to a preset pulse width value.

7. The adaptive TACAN signal generation method according to claim 5, characterized in that: In step S3, the output voltage of the digital potentiometer is adjusted, including: According to the current pulse power amplitude, the digital potentiometer output voltage is increased or decreased in a preset step; Repeat steps S1 to S3, and when the pulse power amplitude of the final power amplifier PA meets the requirement, the current adjustment value of the digital potentiometer is recorded.

8. The adaptive TACAN signal generation method according to claim 5, characterized in that: In step S4, a set of DAC data is calculated and generated by the three-stage method, and the pulse width, rising edge, and falling edge of the output signal of the device are judged in turn according to the pulse waveform collected by the ADC to see whether they meet the requirements and adjust the gate voltage, including: A: The processor uses the three-segment method to calculate and generate a set of DAC data according to the standard waveform signal formula; the first segment of data in the three-segment method is the duration of the half-power value from the start of the signal to the rising edge, and the first standard deviation is ; The second segment of data is the duration from the half-power value of the rising edge to the half-power value of the falling edge, and the second standard deviation is ; The third segment of data is the duration from the half-power value of the falling edge to the end of the signal, and the third standard deviation is ; B: judging whether the pulse width of the output signal of the device meets the first preset value according to the pulse waveform collected by the ADC; if not, changing the second standard deviation in the standard waveform signal formula until the first preset value is met, and recording the DAC data of the current second segment of data; C: judging whether the rising edge of the output signal of the device meets the second preset value according to the pulse waveform collected by the ADC; if not, changing the first standard deviation in the standard waveform signal formula, adjusting the time of the rising edge until the second preset value is met, and recording the DAC data of the current first segment of data; D: judging whether the falling edge of the output signal of the device meets the third preset value according to the pulse waveform collected by the ADC; if not, changing the third standard deviation in the standard waveform signal formula, adjusting the time of the falling edge until the third preset value is met, and recording the DAC data of the current third segment of data; E: Generate a set of DAC data according to the DAC data of the current second segment data, the DAC data of the current first segment data and the DAC data of the current third segment data.

9. The adaptive TACAN signal generation method according to claim 8, characterized in that: The standard waveform signal formula is: ； in, represents the signal at time t The value of is the amplitude, i.e. the maximum value of the signal; is the base of natural logarithms; for the moment; is the center position, that is, the corresponding position when the signal reaches its maximum value t value; is the standard deviation, which determines the width of the signal.

10. The adaptive TACAN signal generation method according to claim 8, characterized in that: The first preset value is 3.5us±0.5us; the second preset value is 2.5us; and the third preset value is 3us.

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