A communication target system

Abstract

The present invention discloses a communication target system, which relates to the field of communication countermeasure technology. The system includes: an unmanned aerial vehicle, which is used to simulate an aerial tactical communication target and fly according to a preset or specified track; an assessment signal generation unit, which is loaded on the unmanned aerial vehicle and is used to generate a tactical communication signal for assessment; a broadband antenna unit, which is electrically connected to the assessment signal generation unit and is used to radiate the tactical communication signal for assessment into a wireless channel; a control unit, which is electrically connected to the unmanned aerial vehicle, the assessment signal generation unit and the broadband antenna unit, respectively, and is used to plan the track of the unmanned aerial vehicle and send a generation control instruction for the tactical communication signal for assessment; a communication unit, which is electrically connected to the control unit and is used for unit access to the network and data transmission; a storage unit, which is electrically connected to the control unit and is used to record real-time longitude and latitude data, the type of tactical communication signal for assessment and the generation sequence. The communication target system provided by the present invention can meet the needs of various assessment tasks.

Description

Technical Field

[0001] The present invention relates to the field of communication countermeasure technology, and in particular to a communication target system. Background Art

[0002] Communication targets are an important support for conducting communication countermeasure training. Their function is to simulate tactical communication radio stations of various models and frequency bands. Trainees use them as combat targets for communication countermeasure reconnaissance and communication countermeasure interference.

[0003] In the related technologies, there are relatively few cases where communication targets are maturely applied in training activities. The public communication targets generally have problems such as single communication signal generation, limited adaptability to assessment subjects, poor scalability, and difficulty in network access, which makes it difficult to meet the needs of various assessment tasks such as communication countermeasure reconnaissance, direction finding, and interference. Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present invention is to provide a communication target system to meet the needs of various assessment tasks.

[0006] A communication target system provided according to an embodiment of the present invention includes:

[0007] Unmanned aerial vehicles (UAVs) are used to simulate aerial tactical communication targets and fly along preset or specified paths;

[0008] An assessment signal generating unit, mounted on the UAV, for generating a tactical communication signal for assessment;

[0009] A broadband antenna unit, electrically connected to the assessment signal generating unit, for radiating the assessment tactical communication signal into a wireless channel;

[0010] A control unit, electrically connected to the UAV, the assessment signal generating unit and the broadband antenna unit, respectively, for planning the trajectory of the UAV and sending a generation control instruction of a tactical communication signal for assessment;

[0011] A communication unit, electrically connected to the control unit, for unit access to the network and data transmission;

[0012] The storage unit is electrically connected to the control unit and is used to record the real-time latitude and longitude data of the UAV during flight, the type of tactical communication signals used for assessment, and the generation timing.

[0013] In an exemplary embodiment of the present invention, the generation control instruction includes the type, frequency band, quantity, time, sequence, modulation method, center frequency and code element width of the tactical communication signal for assessment.

[0014] In an exemplary embodiment of the present invention, the drone comprises:

[0015] A position controller, configured to receive preset or specified control parameters sent by the control unit, and obtain desired roll angle and pitch angle information according to the longitude and latitude data of the flight starting point and the longitude and latitude data of the flight end point or the airspace range data of the flight end point in the control parameters;

[0016] The attitude controller is electrically connected to the position controller and is used to receive the desired roll angle and pitch angle information and calculate an attitude control strategy to control the trajectory of the UAV.

[0017] In an exemplary embodiment of the present invention, the drone includes a DC power supply unit for providing DC power to the assessment signal generating unit.

[0018] In an exemplary embodiment of the present invention, the assessment signal generating unit includes:

[0019] A control instruction receiving module, used for receiving the generation control instruction sent from the control unit;

[0020] A CPU is electrically connected to the control instruction receiving module, and is used to calculate and obtain corresponding waveform data according to the generated control instruction, and process the waveform data to obtain a digital signal;

[0021] A digital-to-analog conversion chip is electrically connected to the CPU and is used to convert the digital signal into a tactical communication signal for assessment and send it to the broadband antenna unit.

[0022] In an exemplary embodiment of the present invention, the CPU includes a storage module for generating control instructions based on the tactical communication signal for assessment, calling preset waveform data corresponding to the control instructions generated by the tactical communication signal for assessment from the storage module, and processing the waveform data to obtain a digital signal.

[0023] In an exemplary embodiment of the present invention, the assessment signal generating unit includes a GPU, and the GPU is electrically connected to the CPU. When the generation control instruction indicates the generation of a tactical communication signal for multi-channel transmission assessment, the GPU calculates the corresponding waveform data on different frequency bands and sends it to the CPU.

[0024] In an exemplary embodiment of the present invention, the generation control instruction is a multi-bit string, including an output channel selection bit, a signal type bit, an amplitude bit, a frequency band bit, and a timing bit.

[0025] In an exemplary embodiment of the present invention, the broadband antenna unit includes a first broadband antenna, a second broadband antenna and a third broadband antenna, wherein the first broadband antenna covers a frequency band range of 3MHz-30MHz, the second broadband antenna covers a frequency band range of 31MHz-300MHz, and the third broadband antenna covers a frequency band range of 1GHz-2GHz.

[0026] In an exemplary embodiment of the present invention, the control unit selects to connect one or more broadband antennas covering the corresponding frequency band range according to the type and frequency band information of the assessment tactical communication signal contained in the generated control instruction.

[0027] The technical solution provided by the present invention may include the following beneficial effects:

[0028] The communication target system provided by the present invention simulates an aerial tactical communication target through a drone, and flies according to a preset or specified track. The assessor sends a generation control instruction of a tactical communication signal for assessment and a drone control instruction to the control unit according to the assessment task, and realizes the simulation of communication countermeasure reconnaissance, direction finding or interference tasks in the process, and the storage unit can record the real-time latitude and longitude data of the drone during flight, the type and generation timing of the tactical communication signal for assessment, etc. Finally, the above data is transmitted to the ground data center through the communication unit, so that the assessor can carry out assessment and evaluation based on the above data. Therefore, the communication target system provided by the present invention can meet the needs of various assessments in practice.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0031] Figure 1 A block diagram showing a composition of a communication target system in an exemplary embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram showing a drone equipped with an assessment signal generating unit in an exemplary embodiment of the present invention;

[0033] Figure 3 A schematic diagram of an examination signal generating unit device in an exemplary embodiment of the present invention is shown;

[0034] Figure 4 A schematic diagram showing a structure of a test signal generating unit in an exemplary embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram of generating a control instruction character string in an exemplary embodiment of the present invention is shown;

[0036] Figure 6 A schematic diagram showing a structure framework of another assessment signal generating unit in an exemplary embodiment of the present invention is shown;

[0037] Figure 7 A schematic diagram of a broadband antenna unit in an exemplary embodiment of the present invention is shown.

[0038] Reference numerals:

[0039] 100, first box; 200, second box. DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0041] In addition, the accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0042] In this example implementation, a communication target system is provided, referring to Figure 1As shown, the system includes a drone, an assessment signal generating unit, a broadband antenna unit, a control unit, a communication unit and a storage unit. The drone is used to simulate an aerial tactical communication target and fly according to a preset or specified track; the assessment signal generating unit is loaded on the drone and is used to generate a tactical communication signal for assessment; the broadband antenna unit is electrically connected to the assessment signal generating unit and is used to radiate the tactical communication signal for assessment into a wireless channel; the control unit is electrically connected to the drone, the assessment signal generating unit and the broadband antenna respectively, and is used to plan the track of the drone and control the generation type and generation sequence of the tactical communication signal for assessment; the communication unit is electrically connected to the control unit and is used for unit access to the network and data transmission; the storage unit is electrically connected to the control unit and is used to record the real-time latitude and longitude data of the drone during flight, the type and generation sequence of the tactical communication signal for assessment.

[0043] The communication target system provided by the present invention simulates an aerial tactical communication target through a drone, and flies according to a preset or specified track. The assessor sends a generation control instruction of a tactical communication signal for assessment and a drone control instruction to the control unit according to the assessment task, and realizes the simulation of communication countermeasure reconnaissance, direction finding or interference tasks in the process, and the storage unit can record the real-time latitude and longitude data of the drone during flight, the type and generation timing of the tactical communication signal for assessment, etc. Finally, the above data is transmitted to the ground data center through the communication unit, so that the assessor can carry out assessment and evaluation based on the above data. Therefore, the communication target system provided by the present invention can meet the needs of various assessments in practice.

[0044] Next, we will refer to Figure 1-Figure 7 The various components of the above system in this example implementation are described in more detail.

[0045] It is understandable that drones are mainly used to simulate aerial tactical communication targets and fly according to preset or specified tracks according to instructions. Specifically, the preset track specifies the latitude and longitude of the starting point and the latitude and longitude of the end point of the drone, and the drone flies in a straight line according to the starting point and end point data. Of course, drones can also fly according to the instructions of ground operators.

[0046] However, whether the drone is flying according to a preset track or according to instructions, it is necessary to record the drone's latitude, longitude, speed, altitude and other information in real time in the storage unit as a basic basis for training evaluation. Specifically, the movement trajectory can be recorded in real time using GPS or Beidou module.

[0047] In addition, the drone needs to have a certain carrying capacity and be able to carry the assessment signal generation unit and move along a predetermined trajectory or a trajectory specified by the operator.

[0048] Furthermore, to ensure that the drone is in the air for a long time, the test signal generation unit needs to be small in size and multi-functional. To ensure stability, the drone can also be designed as an integrated unit with the test signal generation unit. Of course, in order to facilitate repair and save costs, the test signal generation unit and the drone can also be assembled.

[0049] like Figure 2 and Figure 3 As shown, a first box 100 loaded with a control unit, a broadband antenna unit, a communication unit and a storage unit is provided below the drone, and a second box 200 for mounting an assessment signal generating unit is provided below the first box 100, and the assessment signal generating unit is detachably fixed in the second box 200 by bolts or the like. Specifically, the first box 100 is a closed box to prevent the various functional units installed therein from falling. The second box 200 may be provided with an open port to disassemble and maintain the assessment signal generating unit through the open port. Of course, in other embodiments, the second box 200 may not be provided, and a special fixed card slot may be provided directly below the first box 100 to fix the assessment signal generating unit directly below the first box 100.

[0050] On the other hand, the UAV also includes a DC power supply unit, which enables the UAV to have a certain continuous power supply capability and can also provide DC input for the assessment signal generating unit.

[0051] In one embodiment, the drone includes a position controller and an attitude controller. The position controller is used to receive preset or specified control parameters sent by the control unit, and obtain the desired roll angle and pitch angle information according to the longitude and latitude data of the flight start point and the longitude and latitude data of the flight end point or the airspace range data of the flight end point in the control parameters. The attitude controller is electrically connected to the position controller, and is used to receive the desired roll angle and pitch angle information, and calculate the attitude control strategy to control the trajectory of the drone.

[0052] Specifically, position control can be divided into depth control and horizontal control, and the working state formula of the position controller is:

[0053] (1)

[0054] in, , , Different control input parameters for depth control, , , They are different control input parameters for horizontal control. Input parameters for overall control, is the disturbance parameter.

[0055] Furthermore, the analog control input parameter is introduced into the working state of the position controller, and the formula is:

[0056] (2)

[0057] (3)

[0058] (4)

[0059] in, is the mass of the drone, G is the gravity parameter, , Input parameters for different simulation controls, is the track deviation angle, is the pitch angle, For parameters The pitch angle below For parameters The track deviation angle under For parameters The track deviation angle under For parameters The pitch angle below.

[0060] Taking the intersection of depth control and horizontal control as the reference point, define the control error at the reference point, and design a dynamic monitoring module. The formula is:

[0061] (5)

[0062] in, is the control error parameter, is the control error parameter at the horizontal position, To dynamically monitor module parameters, is the error parameter of the pitch angle, It is the depth control error parameter under different control input parameters.

[0063] After obtaining the dynamic monitoring results, the hidden control dynamic equations of horizontal control and depth control are calculated, and the formula is:

[0064] (6)

[0065] (7)

[0066] in, is the disturbance function at the horizontal position, is the hidden coefficient, is the observation coefficient.

[0067] Calculate the total disturbance parameters of the position controller , the expected roll angle of the input parameters And the pitch angle , complete the position control of the UAV, the formula is:

[0068] (8)

[0069] (9)

[0070] (10)

[0071] Then, the desired roll angle and pitch angle output by the position controller become the working instructions of the attitude controller. Therefore, the control strategy of the attitude controller can be calculated according to the input desired roll angle and pitch angle. Under this control strategy, the hidden coefficients , expected roll angle And the pitch angle The value of is:

[0072] (11)

[0073] (12)

[0074] (13)

[0075] in, , , The hidden coefficients are , expected roll angle And the pitch angle The observed value of The hidden coefficients of the attitude controller under the control strategy The value of is the expected roll angle of the attitude controller under the control strategy The value of is the pitch angle of the attitude controller under the control strategy The value of .

[0076] In order to use the attitude controller to achieve accurate UAV trajectory control, it is necessary to calculate the control dynamic angle parameter of the attitude controller using formula (14): , , , and finally use , , Complete the trajectory control of the UAV, including is the track deviation angle, is the observation coefficient, , , It is the depth control error parameter under different control input parameters.

[0077] (14)

[0078] In this way, the trajectory error of the drone can be smaller, the stability is better, and the anti-interference ability is stronger.

[0079] refer to Figure 4 As shown, the assessment signal generation unit includes a control instruction receiving module, a CPU, and a digital-to-analog converter (DAC) chip. The control instruction receiving module is used to receive the generation control instruction of the assessment tactical communication signal from the control unit; the CPU is electrically connected to the control instruction receiving module, and is used to calculate the corresponding waveform data according to the generation control instruction, and process the waveform data to obtain a digital signal; the DAC chip is electrically connected to the CPU, and is used to convert the digital signal into a tactical communication signal for assessment, and send it to the broadband antenna.

[0080] It can be understood that the above-mentioned generation control instructions include information such as the type, frequency band, quantity, time, sequence, modulation method, center frequency and code element width of the tactical communication signal used for assessment.

[0081] Specifically, the control instructions may be generated based on a control signal with fixed timing and fixed signal parameters that is pre-set in the control unit; or the control unit may receive instructions from a commander and make real-time adjustments to the preset fixed signal parameters before generating the instructions.

[0082] Furthermore, the above generation control instruction is as follows Figure 5The figure shows a multi-bit string, including output channel selection bit, signal type bit, amplitude bit, frequency band bit and timing bit. Among them, the output channel selection bit is used to indicate whether it is single-channel transmission or multi-channel transmission. The signal type bit is used to indicate the specific analog signal modulation type, such as amplitude modulation (AM) signal, frequency modulation (FM) signal, universal serial bus (USB) signal, least significant bit (LSB) signal, continuous wave (CW) signal, double-sideband modulation (DSB) signal, quadrature amplitude modulation (QAM) signal, frequency-shift keying (FSK) signal, minimum shift keying (MSK) signal, phase shift keying (PSK) signal and other common tactical communication signal types. The amplitude bit is used to indicate the two maximum values ​​reached by the signal waveform in one cycle. The frequency band bit is used to indicate the frequency of the signal and the frequency band it is in. The timing bit is used to indicate the transmission order and duration of each signal.

[0083] In one embodiment, the CPU also includes a storage module for generating control instructions based on the tactical communication signal for assessment, calling preset waveform data corresponding to the control instructions generated by the tactical communication signal for assessment from the storage module, and processing the waveform data to obtain a digital signal.

[0084] It is understandable that after the CPU generates waveform data according to the generation control instruction, all waveform data will be directly stored in the storage module. When the generation control instruction is received again, it will first search for a match in the storage module to see if there is the same waveform data. If so, it will be directly called, and if not, it will be generated again. In this way, the generation speed of the assessment signal is greatly improved.

[0085] In addition, the CPU also includes a timing module for processing the generation order and transmission order of each signal.

[0086] In another embodiment, Figure 6 As shown, the assessment signal generating unit also includes a GPU, and the GPU is electrically connected to the CPU. When the generation control instruction indicates the generation of a tactical communication signal for multi-channel transmission assessment, the GPU calculates the corresponding waveform data on different frequency bands and sends it to the CPU.

[0087] The advantage of the above-mentioned GPU and CPU parallel computing is that it can improve computing speed and processing power, especially when processing large-scale data and complex computing tasks, it can greatly shorten the computing time.

[0088] Specifically, when the control instruction receiving module receives the generated control instruction, the CPU first determines whether the generated control instruction is for single-channel transmission or multi-channel transmission. If it is for single-channel transmission, the CPU directly calculates the corresponding waveform data according to the generated control instruction. If it is for multi-channel transmission, the GPU calculates the corresponding waveform data on different frequency bands and sends it to the CPU, and finally the CPU processes the waveform data to obtain a digital signal.

[0089] It is understandable that multi-channel transmission means transmitting multiple tactical communication signals simultaneously on different frequency bands. The transmitted tactical communication signals are timed and transmitted in the form of events. The transmission order can be transmitted in sequence according to the order specified by the assessment group, or it can be transmitted randomly in a disorderly order. Each assessment event needs to last for a certain period of time and at least contain key information such as modulation mode, center frequency, and symbol width.

[0090] In one embodiment, the broadband antenna unit is the basis for radiating communication signals outward. Therefore, communication countermeasures need to be equipped with broadband antennas that at least cover all test signal frequency bands such as shortwave, ultra-shortwave, and L-band.

[0091] The control unit can use the switch to select the corresponding antenna in the broadband antenna unit according to the band to which the test signal belongs, so as to radiate the electromagnetic signal of the corresponding frequency band. For example, the frequency band covered by the broadband antenna is 1.5MHz-2000MHz. It should be noted that the control unit can generate multiple test signals of different frequency bands at the same time, can control the broadband antenna unit to connect to one broadband antenna, and can also control the broadband antenna unit to connect to multiple broadband antennas at the same time.

[0092] refer to Figure 7 As shown, the broadband antenna unit may include a first broadband antenna, a second broadband antenna and a third broadband antenna, wherein the first broadband antenna covers a frequency band range of 3MHz-30MHz, which covers shortwave, the second broadband antenna covers a frequency band range of 31MHz-300MHz, which covers ultrashortwave, and the third broadband antenna covers a frequency band range of 1GHz-2GHz, which covers the L band. Of course, in practice, depending on the assessment requirements, there may also be broadband antennas that can cover other frequency bands, which will not be described here.

[0093] It is understandable that the present disclosure does not limit the number of the first broadband antenna, the second broadband antenna, and the third broadband antenna. In actual application, the control unit selects one or more broadband antennas covering the corresponding frequency band range according to the type and frequency band information of the assessment tactical communication signal contained in the generated control instruction, so as to realize the simultaneous radiation of communication signals of one or more frequency bands.

[0094] The specific structure of the broadband antenna includes a V-shaped conductor and a microstrip coupler, and the two sides of the V-shaped conductor are respectively connected to the microstrip coupler. The length and width of the V-shaped conductor determine the center frequency and bandwidth of the antenna. When the width of the V-shaped conductor gradually decreases, the center frequency of the antenna will increase; conversely, when the width of the V-shaped conductor gradually increases, the center frequency of the antenna will decrease. Reflection occurs at the position where the conductor gradually narrows. The reflected current will move upward again, thereby realizing the radiation of the antenna.

[0095] It is understandable that the control unit is the brain of the entire target, and its specific functions include the following aspects: First, it controls the timing of the target's signal transmission, which can be transmitted in a predetermined order, or it can adjust the transmission order, transmission parameters, working frequency band and other contents of the assessment signal at any time according to the commander's instructions; second, it controls the flight trajectory of the drone. The flight trajectory of the drone is a key element in the assessment and evaluation of direction finding and positioning. The control unit can read the preset track pre-stored in the storage unit to control the flight of the drone, and can also receive the control data sent by the drone operator in real time to control the flight track of the drone, and store the real-time flight track data of the drone, such as longitude and latitude, speed, altitude and other data, in the storage unit. After the training is completed, the ground assessment personnel can compare and evaluate the above data transmitted to the ground data center by the communication unit.

[0096] The communication unit uses wired and wireless communication methods to establish a data transmission network between the communication target and other equipment, for example, to transmit the data stored in the storage unit to the ground data center. Therefore, the communication unit needs to have basic IP networking functions, addressing functions, information exchange functions, etc. For details, please refer to the structure of the existing communication unit, which will not be repeated here.

[0097] The communication target system provided by the present invention simulates an aerial tactical communication target through a drone, and flies according to a preset or specified track. The assessor sends a generation control instruction of a tactical communication signal for assessment and a drone control instruction to the control unit according to the assessment task, and realizes the simulation of communication countermeasure reconnaissance, direction finding or interference tasks in the process, and the storage unit can record the real-time latitude and longitude data of the drone during flight, the type and generation timing of the tactical communication signal for assessment, etc. Finally, the above data is transmitted to the ground data center through the communication unit, so that the assessor can carry out assessment and evaluation based on the above data. Therefore, the communication target system provided by the present invention can meet the needs of various assessments in practice.

[0098] It should be noted that, although several units or modules of the system for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above can be concretized in one module. Conversely, the features and functions of a unit or module described above can be further divided into multiple units or modules for concretization. Some or all of the units or modules can be selected according to actual needs to achieve the purpose of the present invention. Those of ordinary skill in the art can understand and implement without paying creative work.

[0099] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed by the present invention.

Claims

1. A communication target system, characterized in that: include: Unmanned aerial vehicles, used to simulate aerial tactical communication targets, flying along preset or specified paths; An assessment signal generating unit, mounted on the UAV, for generating a tactical communication signal for assessment; A broadband antenna unit, electrically connected to the assessment signal generating unit, for radiating the assessment tactical communication signal into a wireless channel; A control unit, electrically connected to the UAV, the assessment signal generating unit and the broadband antenna unit, respectively, for planning the trajectory of the UAV and sending a generation control instruction of a tactical communication signal for assessment; A storage unit, electrically connected to the control unit, for recording the real-time latitude and longitude data of the UAV during flight, the type and generation sequence of the tactical communication signal for assessment; A communication unit, electrically connected to the control unit, used for unit access to the network and data transmission, wherein the communication unit transmits the real-time latitude and longitude data stored in the storage unit, the type and generation timing of the tactical communication signal for assessment to the ground data center, so that the assessor can carry out assessment and evaluation based on the received data; Among them, the generation control instruction includes the type, frequency band, quantity, time, sequence, modulation method, center frequency and code element width of the tactical communication signal for assessment; the control unit selects one or more broadband antennas covering the corresponding frequency band range to radiate electromagnetic signals of the corresponding frequency band according to the type and frequency band information of the tactical communication signal for assessment contained in the generation control instruction.

2. The communication target system according to claim 1, characterized in that: The drone comprises: A position controller, configured to receive preset or specified control parameters sent by the control unit, and obtain desired roll angle and pitch angle information according to the longitude and latitude data of the flight starting point and the longitude and latitude data of the flight end point or the airspace range data of the flight end point in the control parameters; The attitude controller is electrically connected to the position controller and is used to receive the desired roll angle and pitch angle information and calculate an attitude control strategy to control the trajectory of the UAV.

3. The communication target system according to claim 1, characterized in that: The drone includes a DC power supply unit for providing DC power to the assessment signal generating unit.

4. The communication target system according to claim 1, characterized in that: The assessment signal generating unit comprises: A control instruction receiving module, used for receiving the generation control instruction sent from the control unit; A CPU, electrically connected to the control instruction receiving module, for calculating corresponding waveform data according to the generated control instruction, and processing the waveform data to obtain a digital signal; A digital-to-analog conversion chip is electrically connected to the CPU and is used to convert the digital signal into a tactical communication signal for assessment and send it to the broadband antenna unit.

5. The communication target system according to claim 4, characterized in that: The CPU includes a storage module for generating control instructions according to the tactical communication signal for assessment, calling preset waveform data corresponding to the control instructions generated by the tactical communication signal for assessment from the storage module, and processing the waveform data to obtain a digital signal.

6. The communication target system according to claim 5, characterized in that: The assessment signal generating unit includes a GPU, which is electrically connected to the CPU. When the generation control instruction indicates the generation of a tactical communication signal for multi-channel transmission assessment, the GPU calculates the corresponding waveform data on different frequency bands and sends it to the CPU.

7. The communication target system according to claim 1, characterized in that: The generation control instruction is a multi-bit string, including an output channel selection bit, a signal type bit, an amplitude bit, a frequency band bit, and a timing bit.

8. The communication target system according to claim 1, characterized in that: The broadband antenna unit includes a first broadband antenna, a second broadband antenna and a third broadband antenna, wherein the first broadband antenna covers a frequency band range of 3MHz-30MHz, the second broadband antenna covers a frequency band range of 31MHz-300MHz, and the third broadband antenna covers a frequency band range of 1GHz-2GHz.

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