Multi-system radar signal synthesis transmission device and method based on software radio

Abstract

The present invention relates to a multi-system radar signal synthesis transmission device and method based on software radio. By adopting the waveform synthesis technology of "component-waveform mixing" combined with the solution of software-defined radio architecture, the generation and synthesis transmission of different types of radar signals have high flexibility, and it is no longer necessary to add special hardware circuits for different types of radar signals. Only software configuration on a host computer is required to achieve the generation and synthesis of different types of radar signals, thereby effectively reducing the hardware cost of the equipment and greatly increasing the diversity of waveforms. The independent radar signal generator also has software-defined programmable characteristics, with a short research and development cycle and strong maintainability. The components support module updates and additions, which can expand the types of radar signals, thereby increasing the complexity of the synthesized signals. Functional upgrades can be completed without replacing hardware, which can well meet the construction needs of diverse complex electromagnetic environment scenarios.

Description

Technical Field

[0001] The invention belongs to the technical field of radar signal processing, and relates to a multi-system radar signal synthesis transmitting device and method based on software radio. Background Art

[0002] With the continuous promotion and application of various intelligent terminals, the use of radar signals is becoming more and more extensive. There are many types and systems of radar signals. From the duration of transmission, they are divided into pulse signals and continuous wave signals. From the modulation mode, there are generally frequency modulation (linear frequency modulation, nonlinear frequency modulation, step frequency, frequency agility) and phase modulation (two-phase and multi-phase modulation). The free combination of the above radar signals will produce a variety of different signals. However, the generation of traditional radar signals is usually realized by hardware circuits. Its signal type, signal bandwidth and specific signal parameters all depend on the hardware circuits. It is not flexible enough in modern intelligent applications. It is impossible to modify signal parameters in real time, switch signal synthesis types and increase or decrease the number of signal synthesis. Therefore, the hardware circuits of traditional radar signals have problems of low efficiency in signal synthesis transmission applications, such as single generated signal type, insufficient flexibility, poor reconfigurability and high hardware cost. Summary of the invention

[0003] In view of the problems existing in the hardware circuit of the above-mentioned traditional radar signal in the application of signal synthesis transmission, the present invention proposes a multi-system radar signal synthesis transmission device based on software radio and a multi-system radar signal synthesis transmission method based on software radio, which can greatly improve the utilization efficiency of radar signal synthesis transmission.

[0004] In order to achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0005] On the one hand, a multi-system radar signal synthesis transmission device based on software radio is provided, comprising a host computer, a general software radio RF module, a power amplifier and a directional wide-band antenna, wherein the host computer is connected to the directional wide-band antenna through the general software radio RF module and the power amplifier;

[0006] The host computer deploys the Linux operating system and installs a scalable software radio architecture platform, encapsulating various radar signal waveforms in a componentized and modular form. The host computer also deploys a signal synthesizer module, which is used to calculate the number of periodic samples of each radar signal waveform generated by the scalable software radio architecture platform and then calculate the lowest common multiple of different periodic sample numbers, and then perform weighted accumulation and normalization processing after periodically filling all radar signal waveforms to the length of the lowest common multiple, and output the target radar signal to be transmitted; the scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a stepped frequency signal generator and a frequency agile signal generator that adopt software radio technology componentized and modularized;

[0007] The general software radio RF module is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier is used to amplify the power of the target RF signal and send it to the directional wide-band antenna for real-time transmission.

[0008] On the other hand, a method for synthesizing and transmitting multi-system radar signals based on software radio is also provided, which is based on a multi-system radar signal synthesis transmitting device based on software radio, the multi-system radar signal synthesis transmitting device includes a host computer, a universal software radio RF module, a power amplifier and a directional wide-band antenna, the host computer is connected to the directional wide-band antenna through the universal software radio RF module and the power amplifier;

[0009] The host computer deploys the Linux operating system and installs a scalable software radio architecture platform, encapsulating various radar signal waveforms in a componentized and modular form. The host computer also deploys a signal synthesizer module, which is used to calculate the number of periodic samples of each radar signal waveform generated by the scalable software radio architecture platform and then calculate the lowest common multiple of different periodic sample numbers, and then perform weighted accumulation and normalization processing after periodically filling all radar signal waveforms to the length of the lowest common multiple, and output the target radar signal to be transmitted; the scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a stepped frequency signal generator and a frequency agile signal generator that adopt software radio technology componentized and modularized;

[0010] The general software radio RF module is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier is used to amplify the power of the target RF signal and send it to the directional wide-band antenna for real-time transmission;

[0011] The multi-system radar signal synthesis transmission method based on software radio comprises the following steps:

[0012] According to the requirements of the current complex electromagnetic environment application scenarios, each signal generator to be used is connected to the signal synthesizer module;

[0013] The waveform data of multiple radar signals are generated by each signal generator and sent to the signal synthesizer module for signal synthesis to obtain the target radar signal to be transmitted;

[0014] Use a general software radio RF module to convert the target radar signal into a target RF signal suitable for antenna transmission;

[0015] After the target RF signal is amplified by a power amplifier, the target RF signal is radiated by a directional wide-band antenna.

[0016] One of the above technical solutions has the following advantages and beneficial effects:

[0017] The above-mentioned multi-system radar signal synthesis and transmission device and method based on software radio adopts the waveform synthesis technology of "component-waveform mixing" combined with the software defined radio architecture solution, so that the generation and synthesis transmission of different types of radar signals have high flexibility. It is no longer necessary to add special hardware circuits for different types of radar signals. Only software configuration on a host computer is required to realize the generation and synthesis of different types of radar signals, thereby effectively reducing the hardware cost of the equipment and greatly increasing the diversity of waveforms.

[0018] Compared with the traditional radar signal hardware circuit in which the radar signal generator only sends a single or specific signal type, the independent radar signal generator in the above solution also has software-defined programmable characteristics, with a short R&D cycle and strong maintainability. The components support module updates and additions, and can expand the types of radar signals, thereby increasing the complexity of the synthetic signal. Functional upgrades can be completed without replacing hardware, which can well meet the construction needs of diverse and complex electromagnetic environment scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a multi-system radar signal synthesis transmitting device based on software radio in one embodiment;

[0021] Figure 2 The figure is a flow chart of a method for synthesizing and transmitting multi-system radar signals based on software radio in one embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] It should be noted that the reference to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The presentation of this phrase at various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It will be appreciated by those skilled in the art that the embodiments described herein may be combined with other embodiments. The term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0024] The following will describe the implementation of the present invention in detail with reference to the accompanying drawings in the embodiment diagram of the present invention.

[0025] There are many types and systems of radar signals. According to the duration of transmission, they can be divided into pulse signals and continuous wave signals. According to the modulation method, there are generally frequency modulation (such as linear frequency modulation, nonlinear frequency modulation, stepped frequency and frequency agility) and phase modulation (such as two-phase modulation and multi-phase modulation). Nonlinear frequency modulation can be divided into cosine frequency modulation, tangent frequency modulation, inverse tangent frequency modulation, hyperbolic frequency modulation and parabolic frequency modulation. Two-phase modulation (coding sequence) can be divided into Barker code, M sequence and L sequence. Multi-phase modulation (coding sequence) can be divided into Frank code and P-phase code (including P1, P2, P3 and P4). According to whether the phase is coherent, it can be divided into coherent signals and non-coherent signals. According to the change mode of pulse repetition frequency, it can be divided into repetition frequency jitter, repetition frequency slip and repetition frequency variation. The free combination of the above signals will produce a variety of different signals.

[0026] In one embodiment, Figure 1As shown, a multi-system radar signal synthesis transmitting device 100 based on software radio is provided, which may include a host computer 11, a general software radio RF module 13, a power amplifier 15 and a directional wide-band antenna 17. The host computer 11 is connected to the directional wide-band antenna 17 through the general software radio RF module 13 and the power amplifier 15. The host computer 11 deploys the Linux operating system and installs the self-developed scalable software radio architecture platform, encapsulating various radar signal waveforms in a componentized and modularized form. The host computer 11 is also deployed with a signal synthesizer module, which is used to calculate the number of periodic samples of each radar signal waveform generated by the scalable software radio architecture platform and then calculate the least common multiple of the number of different periodic samples, and periodically fill all radar signal waveforms to the length of the least common multiple, and then perform weighted accumulation and normalization processing to output the target radar signal to be transmitted. The scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a step frequency signal generator, and a frequency agile signal generator that are componentized and modularized using software radio technology.

[0027] The general software radio RF module 13 is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier 15 is used to amplify the power of the target RF signal and send it to the directional wide-band antenna 17 for real-time transmission.

[0028] It can be understood that in order to solve the problems existing in the hardware circuits of traditional radar signals in signal synthesis and transmission applications, software-defined radio technology is adopted in this embodiment, and various radar signal waveforms are generated in the host computer 11 using software programming, and then the complex waveform data is loaded into a unified hardware platform (i.e., a general software radio RF module 13) through multi-signal synthesis for real-time transmission, and after adding a power amplifier 15, it is applied in the simulation of various radar signals in complex electromagnetic environments.

[0029] The basic hardware components may include a host computer 11, a general software radio RF module 13, and a directional wide-band antenna 17. The host computer 11 deploys a self-developed scalable software radio architecture platform installed on a Linux operating system, which encapsulates various radar signal waveforms in a componentized and modular form, generates complex waveform signal data in real time through a signal synthesizer module, and communicates with the general software radio RF module 13 for RF processing, and then transmits it in real time through a directional wide-band antenna 17 after power amplification by a power amplifier 15, in order to meet the construction requirements of a complex radar electromagnetic environment. Its working principle can be as follows: Figure 1 shown.

[0030] The signal synthesizer module adopts a variety of signal synthesis technology, which uses the parameters of each signal generator: the periodic sample number label. By using the label technology of software radio, the periodic sample number of different radar signals can be obtained, and then the lowest common multiple of different periodic sample numbers can be calculated. After all radar signals are periodically filled to the length of the lowest common multiple, weighted accumulation and normalization are performed to synthesize the target radar signal, so that it can be sent to the general software radio RF module 13 for RF processing and then enter the directional wide-band antenna 17 for transmission through the power amplifier 15.

[0031] Specifically, the basic steps of signal synthesis and transmission can be as follows: first, according to the type and principle of the radar signal, the signal generator is encapsulated as a software-defined component by software programming, thereby forming a component library of various independent radar signals, which can be used to generate various radar signal waveforms for subsequent signal synthesis. Then, according to the needs of the current complex electromagnetic environment application scenario (such as which types of radar signals need to be included in the complex waveform signal to be transmitted in the current scenario), each signal generator to be used (with its corresponding signal parameters configured) can be connected to the signal synthesizer module to use each signal generator to generate waveform data of multiple radar signals (theoretically, the waveform data of more radar signals can be expanded by software definition, and the specific number is not limited in this specification). Finally, the signal synthesizer module is connected to the general software radio RF module 13 (which is an independent module and has been configured with RF parameters such as RF center frequency, transmission channel and gain) through a signal transmission interface, and radiated through the power amplifier 15 and the directional wide-band antenna 17 after up-conversion. The general software radio RF module 13 is an independent RF front-end module defined by software. Its RF parameters can be configured according to different RF signals that need to be compatible in actual use, and is used to simulate the functions of existing RF front-ends; the directional wide-band antenna 17 is designed to be wide-band in order to be fully compatible with and adapt to the transmission requirements of target radar signals in various possible frequency bands output by the signal synthesizer module.

[0032] The above-mentioned multi-system radar signal synthesis and transmission device 100 based on software radio adopts the waveform synthesis technology of "component-waveform mixing" combined with the software defined radio architecture solution, so that the generation and synthesis transmission of different types of radar signals have high flexibility. It is no longer necessary to add special hardware circuits for different types of radar signals. Only software configuration on a host computer 11 is required to realize the generation and synthesis of different types of radar signals, thereby effectively reducing the hardware cost of the equipment and greatly increasing the diversity of waveforms.

[0033] Compared with the traditional radar signal hardware circuit in which the radar signal generator only sends a single or specific signal type, the independent radar signal generator in the above solution also has software-defined programmable characteristics, with a short R&D cycle and strong maintainability. The components support module updates and additions, and can expand the types of radar signals, thereby increasing the complexity of the synthetic signal. Functional upgrades can be completed without replacing hardware, which can well meet the construction needs of diverse and complex electromagnetic environment scenarios.

[0034] In one embodiment, the host computer 11 is connected to the general software radio RF module 13 via USB 3.0, a Gigabit Ethernet port or a 10 Gigabit optical fiber.

[0035] It can be understood that in this embodiment, the signal synthesizer module in the host computer 11 can be connected to the general software radio RF module 13 via USB3.0, Gigabit network port or 10 Gigabit optical fiber, so that according to the design requirements of the actual application scenario, the transmission speed, bandwidth, applicable scenarios and cost of the radar signal can be flexibly taken into account to adapt to different application scenarios.

[0036] In one embodiment, each signal generator of the scalable software radio architecture platform is implemented using C++ software programming.

[0037] It can be understood that for the software generation of various independent radar signals in the host computer 11, its signal parameters need to be reasonably designed, and considering the performance of radar signal generation, each signal generator is implemented by C++ software programming. The more types of radar signals that need to be used, the richer the signal parameters, the more complex the synthesized target radar signal is, and the closer it can be to the real complex electromagnetic environment. Among them, the signal parameters of the linear frequency modulation signal generator can be designed as follows: sampling rate, baseband signal frequency deviation, time width corresponding to the positive frequency modulation slope, time width corresponding to the negative frequency modulation slope, starting frequency, signal bandwidth, amplitude, pulse repetition period, signal type (pulse or continuous wave), whether it is coherent, and period sample number label.

[0038] The signal parameters of the nonlinear frequency modulation signal generator can be designed as follows: sampling rate, baseband signal frequency deviation, signal bandwidth, amplitude, pulse width, pulse modulation type (such as cosine frequency modulation, tangent frequency modulation, arctangent frequency modulation, hyperbolic frequency modulation and parabolic frequency modulation, etc.), pulse repetition period, signal type (pulse or continuous wave), whether it is coherent, and the number of periodic samples label.

[0039] The signal parameters of the multi-phase coded signal generator can be designed as follows: sampling rate, baseband signal frequency deviation, number of bits per symbol, number of sampling points per symbol, phase coding sequence, amplitude, pulse width, pulse repetition period, signal type (pulse or continuous wave), and period sample number label. The signal parameters of the stepped frequency signal generator can be designed as follows: sampling rate, baseband signal frequency deviation, time width corresponding to the positive slope, time width corresponding to the negative slope, starting frequency, signal bandwidth, number of stepped frequency points, amplitude, pulse repetition period, signal type (pulse or continuous wave), whether it is coherent, and period sample number label.

[0040] The signal parameters of the frequency agile signal generator can be designed as follows: sampling rate, baseband signal frequency deviation, number of samples per frequency point, frequency hopping bandwidth, number of agile frequency points, agile frequency mode (random or ascending or descending), amplitude, pulse repetition period, signal type (pulse or continuous wave), whether it is coherent, and periodic sample number label.

[0041] In one embodiment, Figure 2 As shown, a method for synthesizing and transmitting a multi-system radar signal based on software radio is also provided, which is based on a multi-system radar signal synthesis transmitting device based on software radio. The multi-system radar signal synthesis transmitting device includes a host computer, a general software radio RF module, a power amplifier and a directional wide-band antenna. The host computer is connected to the directional wide-band antenna through the general software radio RF module and the power amplifier. The host computer deploys a Linux operating system and installs a scalable software radio architecture platform, which encapsulates various radar signal waveforms in a componentized modular form. The host computer is also deployed with a signal synthesizer module, which is used to calculate the number of periodic samples of each radar signal waveform generated by the scalable software radio architecture platform and then calculate the least common multiple of different periodic sample numbers, and periodically fill all radar signal waveforms to the length of the least common multiple, and then perform weighted accumulation and normalization processing to output the target radar signal to be transmitted. The scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a step frequency signal generator and a frequency agile signal generator that are componentized and modularized using software radio technology. The general software radio RF module is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier is used to amplify the power of the target RF signal and send it to the directional wide-band antenna for real-time transmission;

[0042] The software radio-based multi-system radar signal synthesis transmission method may include the following processing steps S12 to S18:

[0043] S12, according to the requirements of the current complex electromagnetic environment application scenario, connecting each signal generator to be used to the signal synthesizer module;

[0044] S14, generating waveform data of multiple radar signals through each signal generator and sending the waveform data to the signal synthesizer module for signal synthesis to obtain the target radar signal to be transmitted;

[0045] S16, using a general software radio RF module to convert the target radar signal into a target RF signal suitable for antenna transmission;

[0046] S18, after amplifying the power of the target radio frequency signal by using a power amplifier, radiate the target radio frequency signal by using a directional wide-band antenna.

[0047] The above-mentioned multi-system radar signal synthesis and transmission method based on software radio adopts the waveform synthesis technology of "component-waveform mixing" combined with the software defined radio architecture solution, so that the generation and synthesis transmission of different types of radar signals have high flexibility. It is no longer necessary to add special hardware circuits for different types of radar signals. Only software configuration on a host computer is required to realize the generation and synthesis of different types of radar signals, thereby effectively reducing the hardware cost of the equipment and greatly increasing the diversity of waveforms.

[0048] Compared with the traditional radar signal hardware circuit in which the radar signal generator only sends a single or specific signal type, the independent radar signal generator in the above solution also has software-defined programmable characteristics, with a short R&D cycle and strong maintainability. The components support module updates and additions, and can expand the types of radar signals, thereby increasing the complexity of the synthetic signal. Functional upgrades can be completed without replacing hardware, which can well meet the construction needs of diverse and complex electromagnetic environment scenarios.

[0049] In one embodiment, the host computer is connected to the general software radio RF module via USB 3.0, a Gigabit Ethernet port or a 10 Gigabit optical fiber.

[0050] In one embodiment, each signal generator of the scalable software radio architecture platform is implemented using C++ software programming.

[0051] For the specific limitations of the multi-system radar signal synthesis transmission method based on software radio, please refer to the limitations of the multi-system radar signal synthesis transmission device based on software radio above, which will not be repeated here.

[0052] It should be understood that although Figure 2 The steps in the flowchart are shown in sequence as indicated by the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of the steps, and the steps can be executed in other orders. Moreover, Figure 2At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0053] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus dynamic random access memory (RambusDRAM, referred to as RDRAM) and interface dynamic random access memory (DRDRAM).

[0054] 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.

[0055] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of protection of the invention. It should be pointed out that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A multi-system radar signal synthesis transmitting device based on software radio, characterized in that: It includes a host computer, a general software radio RF module, a power amplifier and a directional wide-band antenna, wherein the host computer is connected to the directional wide-band antenna through the general software radio RF module and the power amplifier; The host computer deploys a Linux operating system and installs a scalable software radio architecture platform, encapsulates various radar signal waveforms in a componentized and modularized form, and the host computer is also deployed with a signal synthesizer module, the signal synthesizer module is used to use the periodic sample number label of each signal generator to calculate the periodic sample number of each radar signal waveform generated by the scalable software radio architecture platform, and then calculate the lowest common multiple of different periodic sample numbers, and then perform weighted accumulation and normalization processing after periodically filling all radar signal waveforms to the length of the lowest common multiple, and output the target radar signal to be transmitted; the scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a stepped frequency signal generator, and a frequency agile signal generator that are componentized and modularized using software radio technology; The general software radio RF module is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier is used to amplify the power of the target RF signal and then send it to the directional wide-band antenna for real-time transmission.

2. The multi-system radar signal synthesis transmitting device based on software radio according to claim 1 is characterized in that: The host computer is connected to the general software radio RF module via USB3.0, Gigabit network port or 10 Gigabit optical fiber.

3. The multi-system radar signal synthesis transmitting device based on software radio according to claim 1 or 2 is characterized in that: Each signal generator of the scalable software radio architecture platform is implemented by C++ software programming.

4. A method for synthesizing and transmitting multi-system radar signals based on software radio, characterized in that: Based on a multi-system radar signal synthesis transmitting device based on software radio, the multi-system radar signal synthesis transmitting device includes a host computer, a general software radio radio frequency module, a power amplifier and a directional wide-band antenna, and the host computer is connected to the directional wide-band antenna through the general software radio radio frequency module and the power amplifier; The host computer deploys a Linux operating system and installs a scalable software radio architecture platform, encapsulates various radar signal waveforms in a componentized and modularized form, and the host computer is also deployed with a signal synthesizer module, the signal synthesizer module is used to use the periodic sample number label of each signal generator to calculate the periodic sample number of each radar signal waveform generated by the scalable software radio architecture platform, and then calculate the lowest common multiple of different periodic sample numbers, and then perform weighted accumulation and normalization processing after periodically filling all radar signal waveforms to the length of the lowest common multiple, and output the target radar signal to be transmitted; the scalable software radio architecture platform includes a linear frequency modulation signal generator, a nonlinear frequency modulation signal generator, a multi-phase coded signal generator, a stepped frequency signal generator, and a frequency agile signal generator that are componentized and modularized using software radio technology; The general software radio RF module is used to convert the target radar signal into a target RF signal suitable for antenna transmission, and the power amplifier is used to amplify the power of the target RF signal and then send it to the directional wide-band antenna for real-time transmission; The software radio-based multi-system radar signal synthesis transmission method comprises the following steps: According to the requirements of the current complex electromagnetic environment application scenarios, each signal generator to be used is connected to the signal synthesizer module; The waveform data of multiple radar signals are generated by each signal generator and sent to the signal synthesizer module for signal synthesis to obtain the target radar signal to be transmitted; Using a general software radio frequency module to convert the target radar signal into a target radio frequency signal suitable for antenna transmission; After the target radio frequency signal is amplified by a power amplifier, the target radio frequency signal is radiated by a directional wide-band antenna.

5. The method for synthesizing and transmitting multi-system radar signals based on software radio according to claim 4 is characterized in that: The host computer is connected to the general software radio RF module via USB3.0, Gigabit network port or 10 Gigabit optical fiber.

6. The method for synthesizing and transmitting multi-system radar signals based on software radio according to claim 4 or 5, characterized in that: Each signal generator of the scalable software radio architecture platform is implemented by C++ software programming.

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