A radar radio frequency channel system

Abstract

The present invention discloses a radar radio frequency channel system, which relates to the field of radar technology and includes a frequency source module, a control module and a channel module. The frequency source module is used to output radar signals; the control module includes a primary control core and a secondary control core, the primary control core is used to receive control commands, the secondary control core is used to collect working status information of the frequency source module, and input the working status information into the primary control core, and the primary control core issues control instructions based on the working status information; each Ka channel transceiver unit and X / Ku channel transceiver unit is connected in parallel with each other, and the secondary control core is used to switch the Ka channel transceiver unit and the X / Ku channel transceiver unit according to the working time period of the frequency source module. That is, when some sub-modules in the frequency source are damaged, the corresponding channels can still be used, which is conducive to increasing signal transmission density and improving the resource utilization rate of the channel module.

Description

Technical Field

[0001] The present invention relates to the field of radar technology, and in particular to a radar radio frequency channel system. Background Art

[0002] In recent years, the rapid development of information technology will inevitably profoundly change the form of future warfare. Information warfare will gradually become the main form of warfare, and information advantage will become the most important operational advantage in determining victory or defeat. Technology is the main way to acquire, transmit, and distribute military information such as target information, battlefield situation, intelligence, and command, as well as one of the main means of information warfare. The control of information requires that military electronic information systems must have the ability to sense, intercept, process, and transmit wide-spectrum radio frequency signals, and radio frequency integration technology can greatly enhance this capability. Modern weapon systems' coordinated operations, multi-task parallelism, long-range precision strikes, and survivability on the information battlefield require the multifunctional integration of electronic information equipment, while meeting the requirements of integration, miniaturization, lightweight, low power consumption, and high reliability to improve the comprehensive effectiveness of information warfare. Radio frequency integration technology is an effective technical approach to achieve multifunctional integration. Radio frequency integration technology adopts a universal, open, software-configurable architecture, which can reduce equipment costs, shorten the development cycle, and realize military electronic equipment.

[0003] Currently, application publication number CN 115575899 A discloses a design method for a phased array radar system based on antenna and RF transceiver integration. This method adopts a phased array radar integrated design concept based on silicon-based chip design, significantly reducing system costs and achieving miniaturized design. However, in actual use, the radar is vulnerable to attacks, which may cause damage to some submodules within the frequency source. The existing method shuts down the corresponding submodule of the frequency source, and the corresponding channel is also put into standby mode. The adjacent submodule is replaced, increasing the channel module workload of the replacement submodule, while the replaced channel module is in standby mode, resulting in low channel module resource utilization. Summary of the Invention

[0004] The technical problem solved by the present invention is: when some sub-modules in the frequency source are damaged, the corresponding sub-modules of the frequency source are currently shut down, and the corresponding channels are also in standby state, and replaced by the adjacent sub-modules, which increases the channel module task load of the sub-module used for replacement, while the replaced channel module is in standby state, resulting in low channel module resource utilization.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a radar radio frequency channel system, comprising a frequency source module, a control module and a channel module, wherein the frequency source module is used to output a radar signal; the control module comprises a primary control core and a secondary control core, wherein the primary control core is used to receive control commands, the secondary control core is used to collect working status information of the frequency source module, and input the working status information into the primary control core, and the primary control core issues control instructions based on the working status information; the channel module is used to receive a first transmit signal generated by the frequency source module and convert the first transmit signal into a second transmit signal, and is also used to receive a first receive signal and convert the first receive signal into a second receive signal, and the channel module is controlled by the secondary control core.

[0006] As a preferred solution of the radar RF channel system described in the present invention, the frequency source module includes a complex waveform generating unit, an agile frequency conversion unit, an up-conversion unit and a down-conversion unit. The secondary control core controls the configuration of the DDS inside the complex waveform generating unit, and can switch the frequency, amplitude and phase of the output waveform in real time to achieve the function of generating an arbitrary waveform; the secondary control core analyzes the operating frequency of the complex waveform generating unit in real time, and synchronously controls the parallel agile frequency conversion units to adapt to the current operating frequency; the signal output by the agile frequency conversion unit is frequency-converted by the up-conversion unit and the down-conversion unit, converted into a first transmission signal, and input into the channel module.

[0007] As a preferred solution of the radar radio frequency channel system described in the present invention, the first transmission signal includes radar signals of 20 MHz, 40 MHz, 80 MHz, 100 MHz, 200 MHz, and 400 MHz.

[0008] As a preferred solution of the radar RF channel system described in the present invention, wherein: the working state includes a working state, a non-working state and a non-working state: if the frequency source module is in a working state and a non-working state, the first-level control core does not send a startup instruction to the frequency source module; if the frequency source module is in a non-working state, the first-level control core sends a startup instruction to the acquisition frequency source module.

[0009] As a preferred solution of the radar RF channel system described in the present invention, the frequency source module also includes a switch power division matrix, which is composed of a single switch unit a. The switch unit a is controlled by the secondary control core, and the secondary control core synchronously controls the agile frequency unit through the switch unit a.

[0010] As a preferred solution of the radar radio frequency channel system described in the present invention, the control module further includes a clock unit, which is used to synchronize the secondary control core and the primary control core with an external timing signal.

[0011] As a preferred solution of the radar RF channel system described in the present invention, wherein: the channel module includes a Ka channel transceiver unit, an X / Ku channel transceiver unit, a broadband multi-channel receiving unit, a broadband transmitting power amplifier unit, a first switch matrix and a second switch matrix, the secondary control core is used to control the working status of the first switch matrix and the second switch matrix, the Ka channel transceiver unit and the X / Ku channel transceiver unit are connected in parallel to each other, the first switch matrix and the second switch matrix are used to control the on and off of the signal inputs at both ends of the Ka channel transceiver unit and the X / Ku channel transceiver unit, the first switch matrix is ​​connected to the broadband transmitting power amplifier unit, and the second switch matrix is ​​connected to the broadband multi-channel receiving unit.

[0012] As a preferred solution of the radar radio frequency channel system described in the present invention, the secondary control core adopts an FPGA chip to synchronously control the complex waveform generating unit, the first switch matrix and the second switch matrix.

[0013] As a preferred solution of the radar RF channel system described in the present invention, the broadband transmitting power amplifier unit is used to receive the first transmitting signal output by the up-conversion unit or the down-conversion unit, and after converting the first transmitting signal into a second transmitting signal, input the second transmitting signal into the corresponding Ka channel transceiver unit or the X / Ku channel transceiver unit through the first switch matrix, and then input the second transmitting signal into the antenna unit through the second switch matrix for transmission.

[0014] As a preferred solution of the radar RF channel system described in the present invention, the antenna unit receives a first receiving signal, inputs the first receiving signal into the broadband multi-channel receiving unit, converts the first receiving signal into a second receiving signal, inputs the first receiving signal into the corresponding Ka channel transceiver unit or X / Ku channel transceiver unit through the second switch matrix, and enters the processing unit through the first switch matrix.

[0015] The beneficial effects of the present invention are as follows: more than one group of Ka channel transceiver units and X / Ku channel transceiver units are arranged inside the channel module, and each Ka channel transceiver unit and X / Ku channel transceiver unit is connected in parallel with each other. The secondary control core is used to switch the Ka channel transceiver unit and the X / Ku channel transceiver unit according to the working time period of the frequency source module. That is, when some sub-modules in the frequency source are damaged, the corresponding channels can still be used, which is beneficial to increase the signal transmission density and improve the resource utilization rate of the channel module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the basic flow of a radar radio frequency channel system provided by one embodiment of the present invention.

[0017] Figure 2 A schematic diagram of a flow chart of a radar radio frequency channel system provided by one embodiment of the present invention.

[0018] Figure 3 A schematic diagram of switching between different channels of a radar radio frequency channel system provided by one embodiment of the present invention.

[0019] Figure 4 A schematic structural diagram of a radar radio frequency channel system provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, but not all of the embodiments.

[0021] Example 1

[0022] Reference Figure 1 and Figure 2 , is an embodiment of the present invention, providing a radar RF channel system, including a frequency source module 100, a control module 200 and a channel module 300. The frequency source module 100 is used to output radar signals; the control module 200 includes a primary control core 201 and a secondary control core 202. The primary control core 201 is used to receive control commands, and the secondary control core 202 is used to collect working status information of the frequency source module 100 and input the working status information into the primary control core 201. The primary control core 201 issues control instructions based on the working status information.

[0023] In this embodiment, the primary control core 201 preferably utilizes a DDS chip. Compared to traditional frequency synthesizers, DDS chips offer advantages such as low cost, low power consumption, high resolution, and fast conversion time. Control instructions, including the radar's transmit and receive band, frequency, amplitude, phase, and time, are input into the primary control core 201. The secondary control core 202 collects operating status information from the frequency source module 100, including information such as the operating time period, output frequency, output power, and the band of the output signal. The operating time period of the frequency source module 100 can be used to determine whether the frequency source module 100 is currently operating. If the current time period is not within the working time period of the frequency source module 100, it indicates that the frequency source module 100 is not in a working state, indicating that the frequency source module 100 can be enabled at the current time, and the first-level control core 201 issues a control instruction to enable the frequency source module 100; if the current time period is within the working time period of the frequency source module 100, or it is detected that the frequency source module 100 has a large output power, it indicates that the frequency source module 100 is in a working state, and no control instruction to enable the frequency source module 100 is issued.

[0024] The channel module 300 is used to receive the first transmit signal generated by the frequency source module 100 and convert the first transmit signal into a second transmit signal. It is also used to receive the first receive signal and convert the first receive signal into a second receive signal. The channel module 300 is controlled by the secondary control core 202.

[0025] In this embodiment, the channel module 300 is preferably configured to receive the first transmit signal generated by the frequency source module 100, convert the first signal into a second transmit signal after analog filtering, amplification, and gain, and then transmit it via the antenna. The channel module 300 receives the first receive signal, filters it, performs low-noise amplification, and converts it into a second receive signal, facilitating signal processing by the signal processing chip. A Ka channel transceiver unit 301 and an X / Ku channel transceiver unit 302 form a group. The channel module 300 is internally configured with one or more Ka channel transceiver units 301 and X / Ku channel transceiver units 302, each connected in parallel. The secondary control core 202 is used to switch between the Ka channel transceiver units 301 and X / Ku channel transceiver units 302 based on the operating time of the frequency source module 100. This means that even if some submodules within the frequency source are damaged, the corresponding channels remain operational, increasing signal transmission density and improving channel module resource utilization.

[0026] Example 2

[0027] Reference Figure 1 and Figure 2 , is another embodiment of the present invention, which is different from the first embodiment.

[0028] The frequency source module 100 includes a complex waveform generating unit 101, an agile frequency conversion unit 102, an up-conversion unit 103 and a down-conversion unit 104. The secondary control core 202 controls the configuration of the DDS inside the complex waveform generating unit 101, and can switch the frequency, amplitude and phase of the output waveform in real time to achieve the function of generating an arbitrary waveform; the secondary control core 202 analyzes the operating frequency of the complex waveform generating unit 101 in real time, and synchronously controls the parallel agile frequency conversion unit 102 to adapt to the current operating frequency; the signal output by the agile frequency conversion unit 102 is frequency-converted by the up-conversion unit 103 and the down-conversion unit 104, converted into a first transmission signal, and input into the channel module 300.

[0029] In this embodiment, the complex waveform generation unit 101 is preferably configured using a DDS chip, enabling real-time switching of the frequency, amplitude, and phase of the output waveform to achieve arbitrary waveform generation and meet complex field requirements. The frequency agile unit 102 is equipped with a switching filter that switches between different frequencies to adapt to the current operating frequency. The up-conversion unit 103 is configured to amplify the signal output by the frequency agile unit 102 to a certain power and output it as the first transmission signal. The down-conversion unit 104 is configured to reduce the signal output by the frequency agile unit 102 to a certain power and output it as the first transmission signal.

[0030] The first transmission signal includes radar signals at 20 MHz, 40 MHz, 80 MHz, 100 MHz, 200 MHz, and 400 MHz. Due to the varying requirements for the linearly swept instantaneous bandwidth of the frequency source for active radar detection, the radar frequency source must be capable of outputting various instantaneous bandwidths. The radar frequency source should be designed to output a series of instantaneous bandwidths, capable of outputting linear frequency modulation signals of 20 MHz, 40 MHz, 80 MHz, 100 MHz, 200 MHz, and 400 MHz, forming a series of instantaneous bandwidths.

[0031] The working state includes a working state, a non-working state, and an inoperable state. When the frequency source module 100 is in the working state, it indicates that the complex waveform generating unit 101, the frequency agile unit 102, the up-conversion unit 103, or the down-conversion unit 104 is in an activated state, that is, in an operating state. During the time period in the working state, the complex waveform generating unit 101, the frequency agile unit 102, the up-conversion unit 103, or the down-conversion unit 104 cannot perform other work tasks. The non-working state indicates that the complex waveform generating unit 101, the frequency agile unit 102, the up-conversion unit 103, or the down-conversion unit 104 is not activated in the current time period and can accept new work tasks. The inoperable state indicates that part of the complex waveform generating unit 101, the frequency agile unit 102, the up-conversion unit 103, or the down-conversion unit 104 is damaged while in the activated state and cannot continue to operate.

[0032] If the frequency source module 100 is in a working state or a non-working state, the first-level control core 201 will not send a startup instruction to the frequency source module 100; if the frequency source module 100 is in a non-working state, the first-level control core 201 will send a startup instruction to the acquisition frequency source module 100. A startup instruction can be sent to the frequency source module 100 in a non-working state to make it work. Since the frequency source module 100 will periodically output a radar signal of a specific frequency when it is working, that is to say, each frequency source module 100 switches back and forth between the working state and the non-working state, and outputs radar signals of other frequencies in the gaps between the non-working states for detecting different targets, and a certain time margin is retained in adjacent output intervals to reduce mutual interference.

[0033] The frequency source module 100 further includes a switch power division matrix 105 , which includes a single switch unit 105 a . The switch unit 105 a is controlled by a secondary control core 202 . The secondary control core 202 performs synchronous control on the agile frequency conversion unit 102 through the switch unit 105 a .

[0034] In this embodiment, the switch unit 105a preferably adopts an existing switch power divider. The switch unit 105a is used to divide the signal generated by the complex waveform generating unit 101 into multiple input agile frequency conversion units 102. The various agile frequency conversion units 102 are connected in parallel with each other, and the agile frequency conversion unit 102 is connected in series with the up-conversion unit 103 or the down-conversion unit 104. The signal generated by the complex waveform generating unit 101 can be passed to the agile frequency conversion unit 102 that is not in a working state through the switch power divider, thereby improving its utilization rate.

[0035] The control module 200 further includes a clock unit 203 , which is used to synchronize the secondary control core 202 and the primary control core 201 with an external timing signal.

[0036] In this embodiment, the clock unit 203 can preferably use a crystal oscillator clock and use a power divider to divide the crystal oscillator signal to generate multiple clock signals to provide reference clock signals to other units, thereby ensuring control of the working time period and non-working time of the frequency source module 100.

[0037] The channel module 300 includes a Ka channel transceiver unit 301, an X / Ku channel transceiver unit 302, a broadband multi-channel receiving unit 303, a broadband transmitting power amplifier unit 304, a first switch matrix 305 and a second switch matrix 306. The secondary control core 202 is used to control the working status of the first switch matrix 305 and the second switch matrix 306. The Ka channel transceiver unit 301 and the X / Ku channel transceiver unit 302 are connected in parallel to each other. The first switch matrix 305 and the second switch matrix 306 are used to control the on and off of the signal inputs at both ends of the Ka channel transceiver unit 301 and the X / Ku channel transceiver unit 302. The first switch matrix 305 is connected to the broadband transmitting power amplifier unit 304, and the second switch matrix 306 is connected to the broadband multi-channel receiving unit 303.

[0038] In this embodiment, the Ka-channel transceiver unit 301 preferably converts the Ka-band frequency to the active X- or Ku-band during transmission, multiplexing it with the X / Ku-band multi-channel transceiver branch, and then converts it uniformly to the S-band. During reception, the process is reversed, but the principles remain the same. When receiving, the X / Ku-channel transceiver unit 302 performs processing such as limiting, blocking, and low-noise amplification on the RF signal fed from the antenna unit 307. It also performs image rejection mixing with the input RF local oscillator signal, amplifies the resulting intermediate frequency signal, performs AGC control, and filters. The RF transmit signal input by the frequency synthesizer is power-divided and amplified, outputting a transmit signal with a certain power. The broadband transmit power amplifier unit 304 consists of two parts: a transmit portion, whose primary function is to up-convert the system's input transmit intermediate frequency signal to (0.4-12) GHz and amplify it to a certain power level before outputting it; and a power amplifier portion, whose primary function is to amplify the 0.4-2 GHz and 2-12 GHz signals generated by the up-conversion unit to a certain power level before outputting them. The broadband multi-channel receiving unit 303 is used to receive signals. The first switch matrix 305 and the second switch matrix 306 are used to control the opening and closing of the Ka channel transceiver unit 301 and the X / Ku channel transceiver unit 302. The Ka channel transceiver unit 301 and the X / Ku channel transceiver unit 302 are connected in parallel, and the first switch matrix 305 and the second switch matrix 306 can be used to select either the Ka channel transceiver unit 301 or the X / Ku channel transceiver unit 302.

[0039] The secondary control core 202 uses an FPGA chip to synchronously control the complex waveform generation unit 101, the first switch matrix 305 and the second switch matrix 306. The secondary control core 202 uses the FPGA chip as the control core, and can program the device internally according to the on-site situation and change its internal operating program.

[0040] The broadband transmitting power amplifier unit 304 is used to receive the first transmitting signal output by the up-conversion unit 103 or the down-conversion unit 104, and after converting the first transmitting signal into a second transmitting signal, input it into the corresponding Ka channel transceiver unit 301 or the X / Ku channel transceiver unit 302 through the first switch matrix 305, and then input the second transmitting signal into the antenna unit 307 through the second switch matrix 306 for transmission.

[0041] The antenna unit 307 receives a first receiving signal and inputs the first receiving signal into the broadband multi-channel receiving unit 303, which converts the first receiving signal into a second receiving signal. The first receiving signal is input into the corresponding Ka channel transceiver unit 301 or X / Ku channel transceiver unit 302 through the second switch matrix 306, and enters the processing unit 308 through the first switch matrix 305.

[0042] When the frequency source module 100 is in the working state of reconnaissance of distant targets, the frequency of the transmitted radar signal is not high, the interval period is long, but the energy is relatively large wide pulse. The frequency source module 100 can be controlled to transmit radar signals in the first half of the wide pulse repetition period, such as short pulses with high frequency and short period, to achieve reconnaissance of close-range targets. This method of overlapping the transmission of radar signals can be used to reduce the search time interval, expand the search area within a repetition period, and search both near and far areas at the same time, effectively improving the search speed.

[0043] It should be appreciated that embodiments of the present invention can be implemented or practiced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The methods can be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner, according to the methods and figures described in the specific embodiments. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with the computer system. However, if desired, the program can be implemented in assembly or machine language. In any case, the language can be a compiled or interpreted language. In addition, the program can be run on a programmed application-specific integrated circuit for this purpose.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A radar radio frequency channel system, characterized in that: include A frequency source module (100), the frequency source module (100) being used to output a radar signal; A control module (200), the control module (200) comprising a primary control core (201) and a secondary control core (202), the primary control core (201) being used to receive control commands, the secondary control core (202) being used to collect working status information of the frequency source module (100) and input the working status information into the primary control core (201), and the primary control core (201) issuing control instructions based on the working status information; a channel module (300), the channel module (300) being used to receive a first transmission signal generated by the frequency source module (100) and convert the first transmission signal into a second transmission signal, and simultaneously being used to receive a first reception signal and convert the first reception signal into a second reception signal, the channel module (300) being controlled by a secondary control core (202); The frequency source module (100) includes a complex waveform generation unit (101), a frequency agility unit (102), an up-conversion unit (103), and a down-conversion unit (104); the secondary control core (202) controls the DDS inside the complex waveform generation unit (101) to configure and switch the frequency, amplitude, and phase of the output waveform in real time to achieve the function of generating an arbitrary waveform; The secondary control core (202) analyzes the operating frequency of the complex waveform generating unit (101) in real time and performs synchronous control on the parallel-connected agile frequency conversion unit (102) to adapt to the current operating frequency; The signal output by the agile frequency conversion unit (102) is frequency-converted by the up-conversion unit (103) and the down-conversion unit (104), converted into a first transmission signal, and input into the channel module (300); The working state includes working state, non-working state and non-working state: If the frequency source module (100) is in an operating state or an inoperable state, the first-level control core (201) does not send a start instruction to the frequency source module (100); If the frequency source module (100) is in a non-working state, the first-level control core (201) sends a start instruction to the acquisition frequency source module (100).

2. The radar radio frequency channel system according to claim 1, wherein: The first transmission signal includes radar signals of 20 MHz, 40 MHz, 80 MHz, 100 MHz, 200 MHz, and 400 MHz.

3. The radar radio frequency channel system according to claim 1, wherein: The frequency source module (100) further includes a switch power division matrix (105), wherein the switch power division matrix (105) is composed of a single switch unit (105a), the switch unit (105a) is controlled by a secondary control core (202), and the secondary control core (202) synchronously controls the agile frequency conversion unit (102) through the switch unit (105a).

4. The radar radio frequency channel system according to claim 1, wherein: The control module (200) further comprises a clock unit (203), wherein the clock unit (203) is used to synchronize the secondary control core (202) and the primary control core (201) with an external timing signal.

5. The radar radio frequency channel system according to claim 3, wherein: The channel module (300) comprises a Ka channel transceiver unit (301), an X / Ku channel transceiver unit (302), a broadband multi-channel receiving unit (303), a broadband transmitting power amplifier unit (304), a first switch matrix (305) and a second switch matrix (306); the secondary control core (202) is used to control the working states of the first switch matrix (305) and the second switch matrix (306); the Ka channel transceiver unit (301) and the X / Ku channel transceiver unit (302) are connected in parallel; the first switch matrix (305) and the second switch matrix (306) are used to control the on / off of signal inputs at both ends of the Ka channel transceiver unit (301) and the X / Ku channel transceiver unit (302); the first switch matrix (305) is connected to the broadband transmitting power amplifier unit (304), and the second switch matrix (306) is connected to the broadband multi-channel receiving unit (303).

6. The radar radio frequency channel system according to claim 1, wherein: The secondary control core (202) uses an FPGA chip to synchronously control the complex waveform generating unit (101), the first switch matrix (305) and the second switch matrix (306).

7. The radar radio frequency channel system according to claim 5, wherein: The broadband transmission power amplifier unit (304) is used to receive a first transmission signal output by the up-conversion unit (103) or the down-conversion unit (104), and after converting the first transmission signal into a second transmission signal, input the second transmission signal into the corresponding Ka channel transceiver unit (301) or the X / Ku channel transceiver unit (302) through the first switch matrix (305), and then input the second transmission signal into the antenna unit (307) through the second switch matrix (306) for transmission.

8. The radar radio frequency channel system according to claim 7, wherein: The antenna unit (307) receives a first receiving signal, inputs the first receiving signal into a broadband multi-channel receiving unit (303), converts the first receiving signal into a second receiving signal, inputs the first receiving signal into a corresponding Ka channel transceiver unit (301) or an X / Ku channel transceiver unit (302) through a second switch matrix (306), and enters a processing unit (308) through a first switch matrix (305).

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