Multifunctional transmitting assembly based on software definition

Abstract

The invention provides a multifunctional transmitting component based on software definition, after an excitation signal is input into the multifunctional transmitting component, the excitation signal is firstly amplified by a driving amplifier and then gated by a switch, the switch is controlled by a software definition signal in real time, gated according to a working mode and enters a switch filtering group, and a saturation amplifier is selected in a radar working mode; in the communication working mode, a linear amplifier is selected, in the interference working mode, a signal is directly connected, and after an emission signal enters the switch filtering group, the emission signal is subjected to switch filtering processing of the switch filtering group, and the final emission signal is output; the switch filtering group is controlled by software-defined signals in real time, and the filtering frequency is switched in real time according to the change of transmitted signals. The system can meet the requirements of different working modes such as saturation emission of radar, linear emission of communication and continuous emission of electronic interference on emission performance, is mainly used for a multifunctional comprehensive radio frequency system, and improves the integrated comprehensive capability of radar, interference and communication.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radar detection, and in particular to a multi-functional transmitting assembly based on software definition, mainly used in multi-functional integrated radio frequency system, and improving the integrated capability of radar, jamming and communication. BACKGROUND

[0002] For a long time, radar, communication and jamming systems have developed independently and vertically. However, with the development of science and technology, the difference between the hardware of various electronic systems is becoming smaller and smaller. It is increasingly urgent to use a set of antenna arrays to realize different application task functions.

[0003] Radar mainly detects targets by actively transmitting signals, the reconnaissance equipment of electronic warfare system passively detects targets by using the electromagnetic signals emitted by the targets, and communication data link realizes effective information transmission by communicating with cooperative targets. From the aspects of radio theory and system implementation, radar, electronic warfare and communication data link system are extremely similar. In principle, radar and communication are both electromagnetic wave transmission and reception processes; the reconnaissance of electronic warfare is electromagnetic wave reception, and electronic jamming is electromagnetic wave transmission; in system structure, the subsystems of the three have considerable overlap, such as antennas, transmitters, receivers, processors, etc. Although there are certain differences in the specific implementation of different functions, if the latest technological achievements are effectively utilized, it is entirely possible to realize the integration of radar, electronic warfare and communication data link functions by using common resources.

[0004] In system composition, the antenna arrays of radar, communication and jamming systems all include similar devices such as antennas, transmitters, receivers, signal processors, etc., and the signals have become increasingly similar, with overlapping frequency ranges, and the signal characteristics are no longer significantly different. Therefore, hardware and software resource sharing is feasible, and implementing multi-functional integrated design can greatly improve the combat capability of the system, while realizing the diversification of radar functions, making the excellent performance of radar available for communication and jamming tasks.

[0005] In implementation, with the rapid development of modern electronic system integration technology, multi-functional radio frequency integrated system is increasingly becoming the development trend of future battlefield electronic systems. For radar-communication-jamming integration, such a multi-functional radio frequency integrated system will be based on an integrated radio frequency front-end, a common radio frequency hardware platform, and through software programming and dynamic configuration, the system will have different functions such as radar, communication and jamming. In short, radar, communication and jamming systems can be integrated through hardware, i.e. sharing part or all of the antenna system, transmission system and reception system; or through software, i.e. after the communication signal is processed by spread spectrum, it is loaded onto the radar signal to form an integrated waveform, through the transmission of the integrated waveform, the detection and communication functions are realized at the same time, and then radar-communication integration is realized.

[0006] The radar, electronic warfare, communication data link various function ability demand, index requirement, work time, work object and so on are different, need to analyze and research the work flow of various functions, resource demand, the type of various functions is merged and combined, the system work mode, business sequence, state switching criterion and so on are determined, the system correlation matrix, dynamic combination model, function switching model and so on are established. Thus, different functions are realized on the same hardware platform through different software function components, co-site interference is eliminated through system resource management, active detection requirements are met, electronic warfare function requirements are met, and the required communication data link capability is also possessed.

[0007] The existing antenna array applied to the transmitting assembly cannot meet the requirements of different working modes such as radar saturation transmission, communication linear transmission and electronic interference continuous transmission on transmission performance, and research on a software-defined multifunctional transmitting assembly is urgently needed to ensure the reconstruction performance of the array. SUMMARY

[0008] In order to overcome the shortcomings of the prior art, the application provides a software-defined multifunctional transmitting assembly, which is mainly used in a multifunctional integrated radio frequency system to improve the integrated capability of radar, interference and communication.

[0009] The technical scheme adopted by the application to solve the technical problems is:

[0010] A software-defined multifunctional transmitting assembly, comprising a drive amplifier, a switch, a saturation amplifier, a linear amplifier and a switch filter group.

[0011] After the excitation signal is input into the multifunctional transmitting assembly, the excitation signal is amplified by the drive amplifier and then selected by the switch, the switch is controlled in real time by a software-defined signal, and the excitation signal is selected and enters the switch filter group according to the working mode, wherein the saturation amplifier is selected in the radar working mode, the linear amplifier is selected in the communication working mode, and the signal is directly transmitted in the interference working mode, the transmitting signal enters the switch filter group, is filtered by the switch of the switch filter group, and is finally output; the switch filter group is controlled in real time by a software-defined signal, and the filtering frequency is switched in real time according to the change of the transmitting signal.

[0012] When the excitation signal is amplified by the drive amplifier, the drive amplifier is in a continuous wave working state, and the three working modes are realized by the switch selection:

[0013] 1) Radar working mode: the saturation amplifier is used for saturated amplification of the signal, and then the switch filter group is used for filtering and outputting the transmitting signal;

[0014] 2) Communication working mode: the linear amplifier is used for linear amplification of the signal, and then the switch filter group is used for filtering and outputting the transmitting signal;

[0015] 3) Interference mode: the amplified signal of the driver amplifier is directly switched to the switch filter bank, thereby realizing the output of the filtered transmission signal.

[0016] The switch and the switch filter bank are both controlled in real time by a software-defined signal: the switch switches the working state of the component in real time; and the switch filter bank switches the filtering frequency in real time according to the change of the transmission signal, thereby ensuring the electromagnetic compatibility requirement of the system.

[0017] The duty cycle requirements in the three modes are as follows:

[0018] 1) Radar mode: the final amplifier is saturated, and the duty cycle is not greater than 35%;

[0019] 2) Communication mode: the final amplifier is linearly amplified, and the duty cycle is not greater than 50%;

[0020] 3) Interference mode: the final amplifier is continuously operated at low power, and the duty cycle is 100%.

[0021] The software-defined multifunctional transmission component has the advantages that it can meet the requirements of different working modes, such as saturated transmission of radar, linear transmission of communication, and continuous transmission of electronic interference, for transmission performance, and is mainly used in a multifunctional integrated radio frequency system, thereby improving the integrated capability of radar, interference, and communication. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a composition schematic diagram of the software-defined multifunctional transmission component.

[0023] Figure 2 is a flowchart of the multifunctional transmission component. DETAILED DESCRIPTION

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Referring to Figure 1 A software-defined multifunctional transmission component mainly comprises a driver amplifier, a switch, a saturated amplifier, a linear amplifier, and a switch filter bank.

[0026] After the excitation signal is input into the multifunctional transmission component, the signal is amplified by the driver amplifier, selected by the switch (which is controlled in real time by a software-defined signal and selected according to the working mode), and then processed by the saturated amplifier (in the radar mode), the linear amplifier (in the communication mode), or directly transmitted (in the interference mode). After the transmission signal enters the switch filter bank (which is controlled in real time by a software-defined signal and switches the filtering frequency in real time according to the change of the transmission signal), the final transmission signal is output after being processed by the switch filter bank.

[0027] Referring to Figure 2 After the excitation signal is amplified by the driving amplifier (the driving amplifier is in continuous wave operation), three working modes can be realized by switch selection: 1) radar working mode: the saturated amplifier (working according to the system requirement duty cycle, generally not more than 35%) realizes the saturated amplification of the signal, and then the switch filter group realizes the output of the filtered transmission signal; 2) communication working mode: the linear amplifier (working according to the system requirement duty cycle, generally not more than 50%) realizes the linear amplification of the signal, and then the switch filter group realizes the output of the filtered transmission signal; 3) interference working mode: the signal amplified by the driving amplifier is directly output to the switch filter group to realize the filtering of the transmission signal.

[0028] The switch and the switch filter group are controlled by the real-time software defined signal: the switch can switch the working state of the component in real time; the switch filter group can switch the filtering frequency in real time according to the change of the transmission signal, so as to ensure the electromagnetic compatibility requirement of the system.

[0029] The main features of the three working modes supported by the system are as follows:

[0030] 1) radar working mode: the final amplifier is saturated and amplified, and the duty cycle is not more than 35%;

[0031] 2) communication working mode: the final amplifier is linearly amplified, and the duty cycle is not more than 50%;

[0032] 3) interference working mode: the final amplifier works continuously at low power, and supports 100% duty cycle.

Claims

1.A multi-functional transmit component based on software definition, comprising a driver amplifier, a switch, a saturated amplifier, a linear amplifier and a switch filter bank, characterized in that: after the excitation signal is input into the multi-functional transmit component, the excitation signal is amplified by the driver amplifier, and then selected by the switch, which is controlled by a software-defined signal in real time, and selected according to the working mode and enters the switch filter bank, wherein the saturated amplifier is selected in the radar working mode, the linear amplifier is selected in the communication working mode, and the signal is directly transmitted in the interference working mode; after the transmit signal enters the switch filter bank, the transmit signal is filtered by the switch filter bank, and finally outputted; the switch filter bank is controlled by the software-defined signal in real time, and switches the filter frequency in real time according to the change of the transmit signal. 2.The multi-functional transmit component based on software definition according to claim 1, characterized in that: when the excitation signal is amplified by the driver amplifier, the driver amplifier is in a continuous wave working state, and the selection by the switch realizes three working modes: 1) radar working mode: the saturated amplifier is used to realize saturated amplification of the signal, and then the switch filter bank is used to realize filtering of the transmit signal and output the filtered transmit signal; 2) communication working mode: the linear amplifier is used to realize linear amplification of the signal, and then the switch filter bank is used to realize filtering of the transmit signal and output the filtered transmit signal; 3) interference working mode: the signal amplified by the driver amplifier is directly transmitted to the switch filter bank, so as to realize filtering of the transmit signal and output the filtered transmit signal. 3.The multi-functional transmit component based on software definition according to claim 1, characterized in that: the switch and the switch filter bank are both controlled by the software-defined signal in real time: the switch switches the working state of the component in real time; and the switch filter bank switches the filter frequency in real time according to the change of the transmit signal, so as to ensure the electromagnetic compatibility requirement of the system. 4.The multi-functional transmit component based on software definition according to claim 1, characterized in that: the duty cycle requirements in the three working modes are as follows: 1) radar working mode: the final amplifier is saturated, and the duty cycle is not greater than 35%; 2) communication working mode: the final amplifier is linearly amplified, and the duty cycle is not greater than 50%; 3) interference working mode: the final amplifier is continuously working at low power, and supports a duty cycle of 100%. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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