Radio fuse simulator implementation method based on RFSOC platform

Abstract

The invention discloses a radio fuse simulator implementation method based on an RFSOC platform. Based on software radio, an RFSOC platform serves as a basic platform of the radio fuze, the fuze function is achieved through software, and the target detection and signal processing functions of the radio fuze of two systems are completed. The Xilinx latest RFSOC adaptive radio frequency development platform is used as a general software radio hardware platform, digital up / down conversion and ADC / DAC functions of radio fuze radio frequency signals are achieved through the RFSOC platform, the signal processing function is achieved on software, and final fuze starting signals are given out in a signal indicator light mode. The radio fuse simulator provided by the invention can generate emission signals of different systems and different parameters and realize signal processing function simulation of fuses of different systems.

Description

Technical Field

[0001] The invention relates to the technical field of radio fuzes, in particular to a method for realizing a radio fuze simulator based on an RFSOC platform. Background Art

[0002] As a control system for the ultimate damage of various ammunition, the fuze has increasingly shown its important position in modern warfare. Among them, the radio fuze is a non-trigger fuze that uses electromagnetic waves to obtain target information. It has the advantages of long range, high detection accuracy, and high target recognition rate. It is an important missile-borne equipment, mainly used to deal with close-range high-speed targets, as well as modern low-altitude penetration, low-altitude and ultra-low-altitude flying targets.

[0003] The FPGA development board used in the radio fuze simulator is Xilinx's latest RFSOC adaptive RF development platform. Eight ADC channels and DAC channels are integrated in one chip, and synchronous processing is simple, so it is very suitable for applications that require multi-channel collaborative processing or high-speed broadband communication applications. It also includes a high-efficiency digital down converter (DDC) and digital up converter (DUC) with programmable interpolation and extraction rates, a numerically controlled oscillator (NCO) and a composite mixer, which is very suitable as a platform for the radio fuze simulator in terms of functionality.

[0004] Currently, a radio fuze simulator based on the RFSOC platform has not yet been implemented. Summary of the invention

[0005] The purpose of the present invention is to provide a method for realizing a radio fuze simulator based on an RFSOC platform, so as to overcome the problem that there is currently a lack of realization of radio fuze simulators in the radio frequency band.

[0006] The technical solution to achieve the purpose of the present invention is: a method for implementing a radio fuze simulator based on RFSOC, the steps are as follows:

[0007] Construction of radio fuze simulator platform based on RFSOC platform: Xilinx's latest RFSOC platform is used as the main body of the radio fuze simulator; the external DAC interface and ADC interface of the RFSOC platform are connected to the RF circuit module. For the signal transmission link, the external DAC interface is first connected to the bandpass filter to filter out the harmonic components of the DAC output signal, and then connected to the power amplifier for signal power amplification, and finally connected to a bandpass filter to filter out the harmonic components generated by the power amplifier, and finally connected to the transmitting antenna to send out the signal; for the signal receiver link, the external receiving signal is first received by the receiving antenna, and then the receiving antenna is first connected to the low-noise amplifier in the RF circuit for amplification of the receiving signal, and then connected to the bandpass filter to filter out the clutter signal, and finally connected to the external ADC interface of the RFSOC platform; the power amplifier, low-noise amplifier and RFSOC platform of the RF circuit module are uniformly powered by the external power supply module;

[0008] Transmitting signal output: The software platform controls the generation of baseband signals, and controls the RFSOC platform to achieve frequency conversion processing of baseband signals. The signal after frequency conversion processing then enters the DAC module to achieve digital-to-analog conversion. Up to 8 RF signals can be controlled to be sent out simultaneously on the software platform; reasonable parameters can be set on the software platform to generate transmitting signals with different parameters; the digital signal generated by the software platform is converted into an analog signal after digital-to-analog conversion by the DAC. The analog signal first passes through a bandpass filter to filter out the harmonic components generated by the DAC, and then is connected to a power amplifier for power amplification of the analog signal, and finally is connected to a bandpass filter to filter out the harmonic components generated by the power amplifier, and finally is connected to the transmitting antenna to send out the signal. Using the software platform to control the radio fuze simulator can generate different types of transmitting signals, including linear frequency modulation, sinusoidal frequency modulation, pseudo-code phase modulation and various composite systems;

[0009] Echo signal reception: After the transmitted signal is reflected by the target, the echo signal is received by the receiving antenna of the radio fuze simulator. After the echo signal enters the RF circuit module, it first passes through a low-noise amplifier for signal amplification, and then is connected to a bandpass filter to filter out clutter signals to obtain the required echo signal. Finally, it is connected to the external ADC interface of the RFSOC platform through a wire. The echo signals received by different receiving antennas are finally connected to different interfaces of the ADC module, thereby realizing the simultaneous reception of multiple signals. The ADC module realizes analog-to-digital conversion and performs digital frequency conversion processing. Finally, the signal enters the signal processing module for subsequent processing;

[0010] Output target information and fuze activation signal: Use the signal processing module on the software platform to control the target information and fuze activation signal detected by the radio fuze; the signal processing module transmits the target information to the distance display module, and transmits the fuze activation signal to the output control module, and finally the detonation signal is output as the output activation signal of the radio fuze simulator.

[0011] Compared with the prior art, the present invention has the following significant advantages: the present invention is based on software radio, uses the RFSOC platform as the basic platform of the radio fuze, realizes the fuze function through software, and completes the target detection and signal processing functions of the two types of radio fuzes. The radio fuze simulator realized by the present invention can generate transmission signals of different systems and different parameters and realize the signal processing function simulation of fuzes of different systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the structural diagram of the radio fuze simulator based on RFSOC.

[0013] Figure 2 This is a physical picture of the radio fuze simulator.

[0014] Figure 3 This is the experimental scene diagram.

[0015] Figure 4 This is a diagram showing the transmitting and receiving signals of the radio fuse in the experiment.

[0016] Figure 5 This is the time domain diagram of the difference frequency signal of radio fuse band 1 in the experiment.

[0017] Figure 6 This is the time domain diagram of the difference frequency signal of band 2 of the radio fuse in the experiment.

[0018] Figure 7 This is the frequency domain and ranging result diagram of the difference frequency signal of radio fuse band 1 in the experiment.

[0019] Figure 8 This is the frequency domain and ranging result diagram of the radio fuse band 2 difference frequency signal in the experiment.

[0020] Fig. 9 This is a graph showing the results of the radio fuse activation signal in the experiment.

[0021] Fig.10 Start signal indicator diagram for the fuze simulator. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] The implementation method of radio fuze simulator based on RFSOC, such as Figure 1 , including the following steps:

[0024] Step 1, build a radio fuze simulator platform based on RFSOC. The present invention uses Xilinx's latest RFSOC platform as the main body of the radio fuze simulator. The external DAC interface and ADC interface of the RFSOC platform are connected to the RF circuit module. For the signal transmission link, the external DAC interface is first connected to the RF bandpass filter, and then connected to the power amplifier, and finally connected to a RF bandpass filter, and finally connected to the transmitting antenna to send out the signal; for the signal receiving link, the external receiving signal is first received by the receiving antenna, and the receiving antenna is first connected to the low-noise amplifier, and then connected to the RF bandpass filter, and finally connected to the external ADC of the RFSOC platform. The power amplifier and low-noise amplifier of the RF circuit module and the RFSOC platform are powered by an external power supply module. Figure 1 Shown is the structural diagram of the radio fuze simulator.

[0025] Step 2, generate a radio fuze simulator transmission signal. Use the software platform to control the radio fuze simulator to generate the required type of fuze transmission signal, set parameters on the IP core of VIO of the vivado software platform, and generate the fuze transmission signal. The digital signal generated by the software platform is converted digitally by the RFSOC platform and converted digitally to analog by the RF transmission module. It is then filtered out of harmonic components by a bandpass filter and a power amplifier, and the signal energy is amplified before being transmitted through the antenna. The radio fuze transmission signal is as follows: Figure 4 The first row is shown.

[0026] Step 3, echo signal reception. After the transmitted signal is reflected by the target, the echo signal is received by the receiving antenna of the radio fuze simulator. The echo signal is first processed by a low noise amplifier and a bandpass filter, and then transmitted to the RFSOC platform for analog-to-digital conversion and digital down-conversion processing, and finally further signal processing. Figure 4 The second row is shown.

[0027] Step 4, perform signal processing. The signal processing function and calculation of the radio fuze simulator based on the RFSOC platform are completed on the software platform. For the signal processing flow of the linear frequency modulation radio fuze, the echo signal and the transmission signal are first mixed and filtered, and the FFT algorithm is used to calculate the difference frequency of the linear frequency modulation system. The measurement module obtains the distance information through the difference frequency, and the measurement result is captured and displayed in real time through the software platform. The waveforms and data of the signal processing at each stage can be captured and observed by the software platform, including the echo signal, mixing signal, filter signal and difference frequency spectrum, such as Figures 5 to 8 As shown, the waveforms and data of each stage of signal processing can also be exported and saved locally.

[0028] Step 5, check the fuze activation signal. The radio fuze simulator is equipped with a fuze activation signal indicator light. If and only if the target information meets the activation conditions of the radio fuze, the indicator light will light up and flash continuously. By observing the status of the indicator light, you can determine the activation status of the radio fuze, such as Fig.10 shown.

[0029] Example

[0030] In order to verify the effectiveness of the present invention, the following actual scenario experiments are carried out. Figure 7 The system parameters are as follows: the radio fuze system adopts a dual-band composite detection method, a linear frequency modulated triangle wave signal, the bandwidth of band 1 is 100MHz, the modulation period is 5us, the bandwidth of band 2 is 100MHz, the modulation period is 10us, the target board distance is 6m, and the radio fuze start signal distance gate is preset to 6.0~8.0m. Figure 7 and Figure 8 The following is the ranging result of the fuze simulator: Fig. 9 The figure shows that the fuze start signal is pulled high. The experimental results are consistent with the preset and meet the design requirements.

[0031] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for implementing a radio fuze simulator based on the RFSOC platform, characterized in that: The following steps are involved: Construction of radio fuze simulator platform based on RFSOC platform: Xilinx's latest RFSOC platform is used as the main body of the radio fuze simulator; the external DAC interface and ADC interface of the RFSOC platform are connected to the RF circuit module. For the signal transmission link, the external DAC interface is first connected to the bandpass filter to filter out the harmonic components of the DAC output signal, and then connected to the power amplifier for signal power amplification, and finally connected to a bandpass filter to filter out the harmonic components generated by the power amplifier, and finally connected to the transmitting antenna to send out the signal; for the signal receiver link, the external receiving signal is first received by the receiving antenna, and then the receiving antenna is first connected to the low-noise amplifier in the RF circuit for amplification of the receiving signal, and then connected to the bandpass filter to filter out the clutter signal, and finally connected to the external ADC interface of the RFSOC platform; the power amplifier, low-noise amplifier and RFSOC platform of the RF circuit module are uniformly powered by the external power supply module; Transmitting signal output: The software platform controls the generation of baseband signals, and controls the RFSOC platform to achieve frequency conversion processing of baseband signals. The signal after frequency conversion processing then enters the DAC module to achieve digital-to-analog conversion. Up to 8 RF signals can be controlled to be sent out simultaneously on the software platform; reasonable parameters can be set on the software platform to generate transmitting signals with different parameters; the digital signal generated by the software platform is converted into an analog signal after digital-to-analog conversion by the DAC. The analog signal first passes through a bandpass filter to filter out the harmonic components generated by the DAC, and then is connected to a power amplifier for power amplification of the analog signal, and finally is connected to a bandpass filter to filter out the harmonic components generated by the power amplifier, and finally is connected to the transmitting antenna to send out the signal. Using the software platform to control the radio fuze simulator can generate different types of transmitting signals, including linear frequency modulation, sinusoidal frequency modulation, pseudo-code phase modulation and various composite systems; Echo signal reception: After the transmitted signal is reflected by the target, the echo signal is received by the receiving antenna of the radio fuze simulator. After the echo signal enters the RF circuit module, it first passes through a low-noise amplifier for signal amplification, and then is connected to a bandpass filter to filter out clutter signals to obtain the required echo signal. Finally, it is connected to the external ADC interface of the RFSOC platform through a wire. The echo signals received by different receiving antennas are finally connected to different interfaces of the ADC module, thereby realizing the simultaneous reception of multiple signals. The ADC module realizes analog-to-digital conversion and performs digital frequency conversion processing. Finally, the signal enters the signal processing module for subsequent processing; Output target information and fuze activation signal: Use the control signal processing module on the software platform to obtain the target information and fuze activation signal detected by the radio fuze; The signal processing module transmits the target information to the distance display module and transmits the fuze start signal to the output control module. Finally, the detonation signal is output as the output start signal of the radio fuze simulator.

2. The method for implementing a radio fuze simulator based on the RFSOC platform according to claim 1, characterized in that: The signal processing module has the following signal processing flow for the linear frequency modulation radio fuze: firstly, the echo signal and the transmission signal are mixed and low-pass filtered to obtain a difference frequency signal, the spectrum of the difference frequency signal is obtained by fast Fourier transform, then the difference frequency is calculated according to the peak position of the spectrum of the difference frequency signal, and finally the distance information of the target is obtained according to the difference frequency. The signal processing module transmits the distance information of the target to the distance display module, and transmits the fuze activation signal to the output control module; The measurement results are captured in real time through the software platform. The waveforms and data of the signal processing at each stage can also be observed online through the software platform, including the echo signal, mixing signal, filtering signal and difference frequency spectrum. The waveforms and data of the signal processing at each stage can be exported to local storage.

3. The method for implementing a radio fuze simulator based on the RFSOC platform according to claim 2 is characterized in that: Connect the external wire of the output control module to a fuze start signal indicator light. For the radio fuze start signal output by the output control module, the radio fuze start signal indicator light can be used to determine whether the radio fuze is started or not. If the indicator light is on, it indicates that a start signal is output.

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