阅读说明：本技术 一种双载波复合制导信号模拟方法 (Double-carrier composite guidance signal simulation method ) 是由 汪桃林 张贺 赵嫚 陈炜 倪博 于 2021-08-02 设计创作，主要内容包括：本发明提供一种双载波复合制导信号模拟方法,包括如下步骤：S1、通过软件对副载频调制信号进行仿真,按照时序要求对码信息进行排列,建立数学模型,得到一个周期的仿真；S2、通过波形编辑软件将所述步骤S1中仿真产生的分时副载波调制信号和脉冲开关信号分别加载到任意波形发生器的通道1和通道2,将通道1输出的副载波信号加载到微波信号源上进行相位调制,将通道2输出的脉冲开关信号加载到微波信号源上进行脉冲调制；S3、微波信号源控制输出载波频率的跳变,从而输出一个双载波复合调制信号,可用于雷达相关产品研发、生产阶段的调制参数测试。(The invention provides a double-carrier composite guidance signal simulation method, which comprises the following steps: s1, simulating the subcarrier frequency modulation signal through software, arranging code information according to time sequence requirements, and establishing a mathematical model to obtain a periodic simulation; s2, loading the time-sharing subcarrier modulation signal and the pulse switching signal generated in the simulation in the step S1 to a channel 1 and a channel 2 of any waveform generator respectively through waveform editing software, loading the subcarrier signal output by the channel 1 to a microwave signal source for phase modulation, and loading the pulse switching signal output by the channel 2 to the microwave signal source for pulse modulation; and S3, controlling the jump of the output carrier frequency by the microwave signal source, thereby outputting a double-carrier composite modulation signal which can be used for the modulation parameter test in the research and development and production stages of radar related products.)

1. A double-carrier composite guidance signal simulation method is characterized by comprising the following steps:

s1, simulating the subcarrier frequency modulation signal through software, arranging code information according to time sequence requirements, and establishing a mathematical model to obtain a periodic simulation model;

s2, loading the time-sharing subcarrier modulation signal and the pulse switching signal generated in the simulation in the step S1 to a channel 1 and a channel 2 of any waveform generator respectively through waveform editing software, loading the subcarrier signal output by the channel 1 to a microwave signal source for phase modulation, and loading the pulse switching signal output by the channel 2 to the microwave signal source for pulse modulation;

and S3, the microwave signal source controls the jump of the output carrier frequency, thereby outputting a double-carrier composite modulation signal.

2. The dual-carrier composite guidance signal simulation method of claim 1 wherein in step S1, the subcarrier modulation signals include an amplitude envelope signal, an address code modulation signal, an information code modulation signal, a unit subcarrier modulation signal, and a full period radio correction command signal simulation.

3. The dual-carrier composite guidance signal simulation method of claim 1, wherein in step S1, the switching signal is generated by controlling the high and low levels of different time sequences; and summing after the subcarrier signals are multiplied by the bit information, and carrying out envelope modulation to obtain subcarrier modulation signals containing identification codes and instruction information.

4. The dual-carrier composite guidance signal simulation method of claim 1, wherein in step S2, the microwave signal source is set to external phase modulation, and the subcarrier signal output by the arbitrary wave generator is loaded on the microwave signal for phase modulation; setting a microwave signal source as external pulse modulation, and connecting a pulse signal output end of an arbitrary waveform generator to a pulse input end of the microwave signal source; and setting the carrier frequency and the output signal power of the microwave signal source, opening the radio frequency switch, and outputting a complex intermittent irradiation radar signal by the microwave signal source.

Technical Field

The invention relates to the technical field of radar signal simulation and test, in particular to a double-carrier composite guidance signal simulation method.

Background

With the development of science and technology and the improvement of weapon guidance precision, people are required to fully utilize and expand the functions of a direct wave signal source to improve the tactical performance of the whole weapon system. Modern electro-optical weapons systems using target capture, guidance of different electromagnetic spectra have enabled the dream of first-hit to become realistic. However, the more advanced and high-precision electronic weapon systems are, the more the corresponding high-precision measurement and detection equipment, especially the high-precision automatic test system, needs to be equipped to ensure the use integrity of the electronic weapon system.

In order to improve the reliability of the weapon system matched test equipment, the invention simulates the double-carrier guide signal through software, establishes a mathematical model, generates a baseband guide signal coding waveform, and modulates the baseband guide signal coding waveform to the microwave signal generator so as to output a double-carrier composite modulation signal.

Disclosure of Invention

The invention aims to provide a double-carrier composite guidance signal simulation method to improve the reliability of the weapon system matched test equipment.

In order to achieve the technical effects, the technical scheme of the invention is as follows: a double-carrier composite guidance signal simulation method is provided, which comprises the following steps:

s1, simulating the subcarrier frequency modulation signal through software, arranging code information according to time sequence requirements, and establishing a mathematical model to obtain a periodic simulation;

s2, loading the time-sharing subcarrier modulation signal and the pulse switching signal generated in the simulation in the step S1 to a channel 1 and a channel 2 of any waveform generator respectively through waveform editing software, loading the subcarrier signal output by the channel 1 to a microwave signal source for phase modulation, and loading the pulse switching signal output by the channel 2 to the microwave signal source for pulse modulation;

and S3, the microwave signal source controls the jump of the output carrier frequency, thereby outputting a double-carrier composite modulation signal.

Further, in step S1, the subcarrier modulation signal includes an amplitude envelope signal, an address code modulation signal, an information code modulation signal, a unit subcarrier modulation signal, and a complete cycle radio correction instruction signal simulation.

Further, in step S1, a switching signal is generated by controlling the high and low levels of different timings; and summing after the subcarrier signals are multiplied by the bit information, and carrying out envelope modulation to obtain subcarrier modulation signals containing identification codes and instruction information.

Further, in step S2, the microwave signal source is set to be external phase modulation, and the subcarrier signal output by the arbitrary wave generator is loaded on the microwave signal for phase modulation; setting a microwave signal source as external pulse modulation, and connecting a pulse signal output end of an arbitrary waveform generator to a pulse input end of the microwave signal source; and setting the carrier frequency and the output signal power of the microwave signal source, opening the radio frequency switch, and outputting a complex intermittent irradiation radar signal by the microwave signal source.

The invention provides a double-carrier composite guidance signal simulation method, and the principle of the method can be applied to the requirements of the modulation parameter test of guide heads of various models.

Drawings

The invention is further described with reference to the accompanying drawings:

FIG. 1 is a schematic block diagram of a dual carrier composite guidance signal simulation method;

fig. 2 is a schematic diagram of a baseband modulation signal generation process.

Detailed Description

The following describes the dual-carrier composite guidance signal simulation method according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the invention.

The core idea of the invention is that the invention simulates two types of baseband guidance signals through MATLAB software, arranges code information of the two types according to the time sequence requirement and establishes an MATLAB mathematical model. And establishing an MATLAB mathematical model to obtain a simulation waveform of one period, and generating radar signal waveform data by using the established mathematical model of the signal. The waveform data is loaded to any waveform generator and modulated to a microwave signal generator so as to output a double-carrier composite modulation signal.

Fig. 1 is a schematic block diagram of a dual-carrier composite guidance signal simulation method, and fig. 2 is a schematic diagram of a baseband modulation signal generation process. As shown in fig. 1 and fig. 2, the technical solution of the present embodiment is as follows:

(1) hardware solution design

The method comprises the steps of simulating subcarrier modulation signals through MATLAB software, arranging code information according to time sequence requirements, establishing an MATLAB mathematical model to obtain simulation of one period, loading time-sharing subcarrier modulation signals and pulse switch signals generated by Matlab simulation to a channel 1 and a channel 2 of an arbitrary waveform generator 33500B through waveform editing software 33503A of Keysight corporation respectively, loading subcarrier signals output by the channel 1 to a microwave signal source E8257D for phase modulation, loading pulse switch signals output by the channel 2 to a microwave signal source E8257D for pulse modulation, and controlling the jump of output carrier frequency by the microwave signal source so as to output a double-carrier composite modulation signal. The scheme is shown in figure 1

(2) Software design

Simulation of complex modulated baseband signals, including simulation of blanking pulse signals and subcarrier modulated signals. Wherein the subcarrier modulation signal comprises an amplitude envelope signal, an address code modulation signal, an information code modulation signal, a unit subcarrier modulation signal and a complete cycle radio correction command signal simulation. The schematic diagram of the signal generation process is shown in fig. 2, and switching signals are generated by controlling the high and low levels of different time sequences; and summing after the subcarrier signals are multiplied by the bit information, and carrying out envelope modulation to obtain subcarrier modulation signals containing identification codes and instruction information. After the baseband signal is generated, the baseband signal is modulated to a frequency band in which the radar operates.

Specifically, a microwave signal source E8257D is set as external phase modulation, and a subcarrier signal output by an arbitrary wave generator is loaded on the microwave signal source E8257D for phase modulation; the microwave signal source E8257D is set to be in external pulse modulation, and the pulse signal output end of the arbitrary waveform generator is connected to the pulse input end of the E8257D. And setting the carrier frequency and the output signal power of the microwave signal source, opening the radio frequency switch, and outputting a complex intermittent irradiation radar signal by the microwave signal source.

Those not described in detail in this specification are within the skill of the art. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.