CN117440488A - Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system - Google Patents

Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system Download PDF

Info

Publication number
CN117440488A
CN117440488A CN202311251825.6A CN202311251825A CN117440488A CN 117440488 A CN117440488 A CN 117440488A CN 202311251825 A CN202311251825 A CN 202311251825A CN 117440488 A CN117440488 A CN 117440488A
Authority
CN
China
Prior art keywords
subnet
power
signal
transmitting power
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311251825.6A
Other languages
Chinese (zh)
Inventor
熊军
孙作亮
张旭
马杰
孙博韬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Yufei Electronic Technology Co ltd
Original Assignee
Xi'an Yufei Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi'an Yufei Electronic Technology Co ltd filed Critical Xi'an Yufei Electronic Technology Co ltd
Priority to CN202311251825.6A priority Critical patent/CN117440488A/en
Publication of CN117440488A publication Critical patent/CN117440488A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a power control method of a multi-subnet unmanned aerial vehicle frequency hopping communication system, which comprises the following steps: transmitting signals to the relay according to preset transmitting power, and adjusting the power intensity of the transmitting power until receiving feedback signals of the relay; receiving a transmitting power adjustment quantity determined by the relay according to the signal parameter statistic value of the subnet node, and adjusting the transmitting power of the subnet node according to the transmitting power adjustment quantity; time slots of frequency hopping communication between the subnet node and the repeater are acquired, and at the start time of each time slot, the gain of the receiver is adjusted according to the power of the received feedback signal. The scheme can improve the flexibility and stability of the power control of the multi-subnet frequency hopping communication system and reduce the interference of frequency hopping signals among the multiple subnets.

Description

Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system
Technical Field
The invention relates to the technical field of unmanned aerial vehicle multi-subnet communication, in particular to a power control method and device of a multi-subnet unmanned aerial vehicle frequency hopping communication system, an unmanned aerial vehicle terminal and a storage medium.
Background
The unmanned aerial vehicle self-organizing network adopts a centralized and distributed network architecture, the network architecture is divided into two layers, the network architecture is divided into a plurality of task sub-networks according to task demands, a cluster head unmanned aerial vehicle is selected in each sub-network to form a first layer network, and the unmanned aerial vehicles in the rest clusters are controlled by the cluster heads to form a second layer network. The large subnetwork can be divided into finer subnetworks, so that the diversity of combat tasks can be realized conveniently.
Because the signal bandwidth of each time the unmanned aerial vehicle terminal sends is wider, can not guarantee sufficient frequency interval in the operating bandwidth to reduce the mutual interference between a plurality of subnetworks. In order to reduce frequency interference between multiple subnets, a frequency hopping technique is generally adopted to make a fixed wireless transmitting frequency hop back and forth according to a certain rule and speed.
In an actual application scenario, the distance between the main nodes of a plurality of subnets is relatively short, and the intra-cluster nodes of each subnet may generate near-far effect. It is therefore desirable for each subnet node to be able to automatically adjust the transmit power while the receiver has automatic gain control capabilities. However, the existing power control method is not suitable for the multi-subnet unmanned aerial vehicle frequency hopping communication system.
Disclosure of Invention
In order to reduce frequency interference in a multi-subnet unmanned aerial vehicle frequency hopping communication system, the scheme provides a power control method, a device, an unmanned aerial vehicle terminal and a storage medium of the multi-subnet unmanned aerial vehicle frequency hopping communication system, and the mutual interference among multiple subnets is reduced on the premise of meeting link stability by adjusting the transmitting power of a subnet node according to feedback in a system downlink; according to the communication time slot and signal interference condition of the sub-network, the gain of the receiver is adaptively adjusted, so that the output signal can be correctly demodulated, thereby achieving the anti-interference purpose of the frequency hopping channel.
According to a first aspect of the present invention, there is provided a power control method of a multi-subnet unmanned aerial vehicle frequency hopping communication system, comprising: transmitting signals to the relay according to preset transmitting power, and adjusting the power intensity of the transmitting power until receiving feedback signals of the relay; receiving a transmitting power adjustment quantity determined by the relay according to the signal parameter statistic value of the subnet node, and adjusting the transmitting power of the subnet node according to the transmitting power adjustment quantity; time slots of frequency hopping communication between the subnet node and the repeater are acquired, and at the start time of each time slot, the gain of the receiver is adjusted according to the power of the received feedback signal.
The self power control is realized by the interactive power control and the gain adjustment performed once in each time slot, so that the normal operation of communication between multiple sub-networks can be ensured, the power interference to surrounding sub-networks caused by excessive power can be avoided, and the stability and the flexibility of the power control of the multi-sub-network frequency hopping communication system are improved.
Optionally, in the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system provided by the invention, if the subnet node does not receive the feedback signal of the repeater in the preset time slot, the transmitting power is gradually increased until the feedback signal of the repeater is received.
Optionally, in the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system provided by the invention, the signal parameter statistical value of the subnet node comprises a signal strength indication value, a signal to noise ratio and a receiving error rate.
Optionally, in the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system provided by the invention, if the signal strength indication value is larger than a first preset value, the signal to noise ratio is smaller than a second preset value or the receiving error rate is higher than a third preset value, the transmitting power of the subnet node is increased, and a first adjusting value of the transmitting power is determined;
if the signal strength indication value is smaller than the first preset value and the signal to noise ratio is higher than the second preset value, maintaining the current transmitting power;
if the signal strength indication value is larger than the first preset value and the signal to noise ratio is higher than the second preset value, reducing the transmitting power of the subnet node and determining a second adjusting value of the transmitting power;
and receiving a first adjustment value or a second adjustment value of the transmitting power issued by the relay, and adjusting the transmitting power of the subnet node according to the first adjustment value or the second adjustment value.
Optionally, in the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system provided by the invention, the subnet node adjusts the gain of the receiver once in each time slot; according to the power of the received signal, the gain of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier is regulated, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value; when the power of the received signal increases, the gain value of any one or more stages of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier is reduced, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value.
According to a second aspect of the present invention, there is provided a power control apparatus of a multi-subnet unmanned aerial vehicle communication system, comprising: the device comprises a first adjusting module, a second adjusting module and a third adjusting module.
The first adjusting module is suitable for transmitting signals to the relay according to preset transmitting power, and adjusting the power intensity of the transmitting power until receiving feedback signals of the relay;
the second adjusting module is used for receiving the transmitting power adjusting quantity determined by the relay according to the signal parameter statistic value of the subnet node and adjusting the transmitting power of the subnet node according to the transmitting power adjusting quantity;
and the third adjusting module is used for acquiring time slots of frequency hopping communication between the subnet node and the repeater, and adjusting the gain of the receiver according to the power of the received feedback signal at the starting time of each time slot.
According to a third aspect of the present invention, there is provided a drone terminal comprising: at least one processor; and a memory storing program instructions, wherein the program instructions are configured to be adapted to be executed by the at least one processor, the program instructions comprising instructions for performing the power control method of the multi-subnet unmanned aerial vehicle communication system described above.
According to a fourth aspect of the present invention, there is provided a readable storage medium storing program instructions that, when read and executed by a drone terminal, cause the drone terminal to perform the power control method of the multi-subnet drone communication system described above.
According to the scheme of the invention, the transmitting power of the sub-network nodes is regulated according to feedback in the downlink of the system, so that the mutual interference among multiple sub-networks is reduced on the premise of meeting the link stability; according to the communication time slot and signal interference condition of the sub-network, the gain of the receiver is adaptively adjusted, so that the output signal can be correctly demodulated, thereby achieving the anti-interference purpose of the frequency hopping channel.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 shows a schematic structural diagram of a multi-subnet unmanned aerial vehicle frequency hopping communication system according to an embodiment of the invention;
fig. 2 shows a flow diagram of a power control method 200 of a multi-subnet unmanned aerial vehicle frequency hopping communication system according to one embodiment of the invention;
FIG. 3 illustrates a three-stage gain adjustment schematic of a subnet node receiver in accordance with one embodiment of the invention;
fig. 4 shows a schematic structural diagram of a power control apparatus 400 of a multi-subnet unmanned aerial vehicle communication system according to an embodiment of the invention;
fig. 5 shows a structural diagram of the unmanned aerial vehicle terminal 100 according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Frequency hopping is a method of spreading the frequency spectrum by continuously hopping the carrier frequency, which is resistant to interference at certain frequencies in the communication channel. The multi-subnet unmanned aerial vehicle communication system constructed based on the frequency hopping technology can effectively reduce the mutual interference among subnets.
Fig. 1 shows a schematic structural diagram of a multi-subnet unmanned aerial vehicle frequency hopping communication system according to an embodiment of the invention. As shown in fig. 1, the system includes a repeater network and a plurality of inter-machine cooperative networks, a subnet 1 performs information interaction with the repeater 1 through an f1 frequency band, a subnet 2 performs information interaction with the repeater 2 through an f2 frequency band, a subnet 3 performs information interaction with the repeater 3 through an f3 frequency band, information interaction is performed between the repeaters through an f5 frequency band, and frequency hopping frequency bands are mutually orthogonal.
Because the bandwidth of each unmanned aerial vehicle node transmitting signal in the multi-subnet unmanned aerial vehicle communication system is wider, enough frequency interval can not be ensured to reduce the mutual interference between a plurality of subnets. The distance between the subnet and the repeater is different, and subnet communication with a short distance can affect subnet communication with a long distance.
As shown in fig. 1, the subnet 1 is close to the repeater 1, and the subnet 2 is far from the repeater 2, and there is a near-far effect in performing the relay communication, that is, the transmission signal of the subnet 1 will interfere with the transmission signal of the subnet 2. In order to solve the near-far effect, the transmitting power of each subnet node can be adaptively adjusted.
In order to reduce the signal interference problem in the multi-subnet frequency hopping communication system, the scheme provides a power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system, and the transmitting power of a subnet node is regulated according to feedback in a system downlink, so that the mutual interference among multiple subnets is reduced on the premise of meeting the link stability; according to the communication time slot and signal interference condition of the sub-network, the gain of the receiver is adaptively adjusted, so that the output signal can be correctly demodulated, thereby achieving the anti-interference purpose of the frequency hopping channel.
Fig. 2 shows a flow diagram of a power control method 200 of a multi-subnet drone frequency hopping communication system according to one embodiment of the invention. As shown in fig. 2, the method 200 starts with step S210 of transmitting a signal to the relay according to a preset transmission power, and adjusting the power strength of the transmission power until a feedback signal of the relay is received.
When the subnet node initially accesses the system, the subnet node can transmit signals to the relay in the system according to the preset transmitting power intensity. At this time, if the subnet node does not receive the feedback signal of the repeater in the preset time slot, the transmitting power is gradually increased until the feedback signal of the repeater is received.
For example, a cooperative child node in the subnet 2 communicates with the relay 2, and the cooperative child node in the subnet 2 receives the broadcast signal and RSSI (signal strength indication) of the relay 2, sets its own transmission power level according to the RSSI signal. If the child node has not received the response of the repeater 2, the transmit power is increased until a feedback signal is received.
Step S220 is then executed, where the receiving repeater adjusts the transmission power of the subnet node according to the transmission power adjustment amount determined by the signal parameter statistic of the subnet node.
After completing the establishment of the communication connection by the open loop power control system in step S210, closed loop power control may be entered. The repeater can send the transmitting power adjustment quantity to the subnet node according to the received signal parameter statistic values such as RSSI (signal strength indication value), SNR (signal to noise ratio), BER (receiving error rate) and the like of the subnet node.
The RSSI represents the power strength of the received signal, and is usually represented by a negative number, for example, -60dBm, and in wireless communication, it is generally required to evaluate the signal quality according to the actual application scenario and the equipment characteristics, and further, it is required to consider the signal-to-noise ratio, the bit error rate and other relevant parameters to comprehensively determine whether the signal quality meets the requirements.
Specifically, if the signal strength indication value is greater than the first preset value, the signal to noise ratio is smaller than the second preset value or the receiving error rate is higher than the third preset value, the transmitting power of the subnet node is increased, and the first adjusting value of the transmitting power is determined.
For example, RSSI is large in the unmanned aerial vehicle communication system and is in the range of-60 to-70 dbm, but the signal to noise ratio is lower than 70db or the error rate is higher than 10 -9 And indicating that the received signal is interfered, and increasing the transmitting power of the subnet node is needed to resist the external power interference.
If the signal strength indication value is smaller than the first preset value and the signal to noise ratio is higher than the second preset value, the current transmitting power is maintained.
For example, although the RSSI value is not large, the SNR is high, which means that the received signal is far away, but the interference is not received or the interference received is small, and the current transmission power is maintained.
If the signal strength indication value is larger than the first preset value and the signal to noise ratio is higher than the second preset value, the transmitting power of the subnet node is reduced, and a second adjusting value of the transmitting power is determined.
For example, a large RSSI value and a high SNR value indicate that the received signal is close in distance and has no interference, at which time the transmitted signal power may be reduced appropriately.
And finally, receiving a first adjustment value or a second adjustment value of the transmitting power issued by the relay by the subnet node, and increasing or reducing or maintaining the transmitting power of the subnet node according to the first adjustment value or the second adjustment value. Therefore, on the premise of meeting the link stability, the transmitting power of the sub-network nodes can be reduced as much as possible, and the signal interference among multiple sub-networks is reduced.
Finally, step S230 is executed to obtain time slots of frequency hopping communication between the subnet node and the repeater, and at a start time of each time slot, gain of the receiver is adjusted according to power of the received feedback signal.
After the interactive power control of the relay to the subnet node is completed, the subnet node can adaptively adjust the gains of the gain modules of the receiver according to the received signal power.
It should be noted that, for a frequency hopping communication system, if one frequency hopping system includes multiple hops, the gain of the receiver is adjusted only once per slot.
For example, a slot 100 hops, if all 100 hops are interfered, the output interference power is-14 DBFS. If 50 hops are not interfered, the signal without being interfered can be correctly demodulated, and the SNR measurement is also normal. At this time, the AGC gain is adjusted to-14 DBFS according to the signal which is not interfered, the power of the interfered signal is saturated and overflowed, and the LDPC/TURBO decoding is not participated after the saturated and overflowed signal power, so that the signal can be correctly demodulated even if half of the frequency hopping system is interfered.
Specifically, the gains of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier can be adjusted according to the power of the received signal, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value; when the power of the received signal increases, the gain value of any one or more stages of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier is reduced, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value.
Fig. 3 shows a three-stage gain adjustment schematic of a subnet node receiver in accordance with one embodiment of the invention. As shown in fig. 3, when the received power is-95 Dbm during the debugging, three gain adjusters (ADC analog-to-digital converter, VGA variable gain adjuster, TDX-AMP time division duplex amplifier) of the receiver are adjusted so that the signal power outputted from the ADC is equal to the preset maximum coding level value-14 Dbfs.
The agcv0=60 is recorded at this time, while the gain adjustment values adc_g0, VGA0, and tdx_amp of the respective regulators are recorded.
After waiting until the system is operated, if the power of the received signal becomes-90 DBM, the power of 5DB is increased over the debugging phase, and if the gains of the various stages of receivers (ADC_G0, VGA0 and TDX_AMP) are unchanged, the received signal power becomes-9 DBFS. At this time, a certain level of the three-level gain or a multi-level gain controller needs to be adjusted. For example, the FPGA-controlled VGA is adjusted down by 5DB, at which time the received signal power at the ADC output is still-14 DBFS, and the value of each 0.5DB is changed to 1, so agc_v is increased by 10 compared to agc_v0, and agc_v=70.
The power of the received signal can be reduced to near the receive sensitivity during the debug phase, e.g. when-95 DBM is the receiver sensitivity, the AGC adjustment value at the time of debug is recorded as 60 (ADC output-14 DBFS), when the received power is very low.
During system communication, if two devices are very close (when the subnet and the repeater are very close), the gain of the receiver needs to be continuously reduced, so that the high-power signal will not overflow to the ADC output, the received power is just-14 DBFS, and if the gain is reduced by 20DB (AGC value is 100) compared with the sensitivity, the power of the receiver is-75 DBM. In practice, the larger the AGC value, the more power the received signal, and the smaller the gain the receiver needs to adjust.
The AGC adjustment range is 60DB and the power of the received signal can be from-95 dbM to-25 dbM. If the ADC is 12 BITs, one BIT is a sign BIT, then the full scale I/Q amplitude is 2048 for an ADC signal of 11 BITs, if the output signal average amplitude I/Q is 400 dbfs1=20×log10 (400/2048); the average amplitude of this signal corresponds to an ADC output of-14 DBFS.
AGC adjusts only for slow fading signals so that one slot, e.g., 1ms, adjusts only once. For example, the drone node 1ms will only move 300m, so the decay is less than 0.5DB, so it is a slow fading process. The time slot is only adjusted once, so that the system can track the slow fading process of the upper system and can be adjusted more stably, and the gain cannot jump back and forth, so that the system is unstable.
Fig. 4 shows a schematic structural diagram of a power control apparatus 400 of a multi-subnet unmanned aerial vehicle communication system according to an embodiment of the invention. As shown in fig. 4, the apparatus includes a first adjustment module 410, a second adjustment module 420, and a third adjustment module 430.
The first adjustment module 410 may transmit a signal to the repeater according to a preset transmission power, and adjust the power strength of the transmission power until a feedback signal of the repeater is received.
The second adjusting module 420 may receive the transmit power adjustment amount determined by the relay according to the signal parameter statistics of the subnet node, and adjust the transmit power of the subnet node according to the transmit power adjustment amount;
the third adjustment module 430 may obtain time slots of the frequency hopping communication between the subnet node and the repeater, and adjust the gain of the receiver according to the power of the received feedback signal at a start time of each time slot.
Fig. 5 shows a structural diagram of the unmanned aerial vehicle terminal 100 according to an embodiment of the present invention. As shown in fig. 5, in a basic configuration 102, the drone terminal 100 typically includes a system memory 106 and one or more processors 104. The memory bus 108 may be used for communication between the processor 104 and the system memory 106.
Depending on the desired configuration, the processor 104 may be any type of processor, including, but not limited to: a microprocessor (μp), a microcontroller (μc), a digital information processor (DSP), or any combination thereof. The processor 104 may include one or more levels of caches, such as a first level cache 110 and a second level cache 112, a processor core 114, and registers 116. The example processor core 114 may include an Arithmetic Logic Unit (ALU), a Floating Point Unit (FPU), a digital signal processing core (DSP core), or any combination thereof. The example memory controller 118 may be used with the processor 104, or in some implementations, the memory controller 118 may be an internal part of the processor 104.
Depending on the desired configuration, system memory 106 may be any type of memory including, but not limited to: volatile memory (such as RAM), non-volatile memory (such as ROM, flash memory, etc.), or any combination thereof. The physical memory in the drone terminal is typically referred to as volatile memory RAM, and the data in the disk needs to be loaded into the physical memory to be readable by the processor 104. The system memory 106 may include an operating system 120, one or more applications 122, and program data 124.
In some implementations, the application 122 may be arranged to execute instructions on an operating system by the one or more processors 104 using the program data 124. The operating system 120 may be, for example, linux, windows or the like, which includes program instructions for handling basic system services and performing hardware-dependent tasks. The application 122 includes program instructions for implementing various functions desired by the user, and the application 122 may be, for example, a browser, instant messaging software, a software development tool (e.g., integrated development environment IDE, compiler, etc.), or the like, but is not limited thereto. When the application 122 is installed into the drone terminal 100, a driver module may be added to the operating system 120.
When the drone terminal 100 starts up, the processor 104 reads the program instructions of the operating system 120 from the memory 106 and executes them. Applications 122 run on top of operating system 120, utilizing interfaces provided by operating system 120 and underlying hardware to implement various user-desired functions. When a user launches the application 122, the application 122 is loaded into the memory 106, and the processor 104 reads and executes the program instructions of the application 122 from the memory 106.
The drone terminal 100 also includes a storage device 132, the storage device 132 including a removable storage 136 and a non-removable storage 138, the removable storage 136 and the non-removable storage 138 each being connected to the storage interface bus 134.
The drone terminal 100 may also include an interface bus 140 that facilitates communication from various interface devices (e.g., output devices 142, peripheral interfaces 144, and communication devices 146) to the base configuration 102 via the bus/interface controller 130. The example output device 142 includes a graphics processing unit 148 and an audio processing unit 150. They may be configured to facilitate communication with various external devices such as a display or speakers via one or more a/V ports 152. Example peripheral interfaces 144 may include a serial interface controller 154 and a parallel interface controller 156, which may be configured to facilitate communication with external devices such as input devices (e.g., keyboard, mouse, pen, voice input device, touch input device) or other peripherals (e.g., printer, scanner, etc.) via one or more I/O ports 158. The example communication device 146 may include a network controller 160, which may be arranged to facilitate communication with one or more other drone terminals 162 over a network communication link via one or more communication ports 164.
The network communication link may be one example of a communication medium. Communication media may typically be embodied by computer readable instructions, data structures, program modules, and may include any information delivery media in a modulated data signal, such as a carrier wave or other transport mechanism. A "modulated data signal" may be a signal that has one or more of its data set or changed in such a manner as to encode information in the signal. By way of non-limiting example, communication media may include wired media such as a wired network or special purpose network, and wireless media such as acoustic, radio Frequency (RF), microwave, infrared (IR) or other wireless media. The term computer readable media as used herein may include both storage media and communication media. In the drone terminal 100 according to the present invention, the application 122 includes instructions for performing the power control method 200 of the multi-subnet drone hopping communication system of the present invention.
According to the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system, the transmitting power of the subnet nodes is adjusted according to feedback in the downlink of the system, and the mutual interference among multiple subnets is reduced on the premise of meeting the requirement of link stability; according to the communication time slot and signal interference condition of the sub-network, the gain of the receiver is adaptively adjusted, so that the output signal can be correctly demodulated, thereby achieving the anti-interference purpose of the frequency hopping channel.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules or units or components of the devices in the examples disclosed herein may be arranged in a device as described in this embodiment, or alternatively may be located in one or more devices different from the devices in this example. The modules in the foregoing examples may be combined into one module or may be further divided into a plurality of sub-modules.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.
Furthermore, some of the embodiments are described herein as methods or combinations of method elements that may be implemented by a processor of a computer system or by other means for performing the functions. Thus, a processor with the necessary instructions for implementing a method or a method element forms a means for implementing the method or the method element. Furthermore, the elements of the apparatus embodiments described herein are examples of the following apparatus: the apparatus is for carrying out the functions performed by the elements for carrying out the objects of the invention.
As used herein, unless otherwise specified the use of the ordinal terms "first," "second," "third," etc., to describe a general object merely denote different instances of like objects, and are not intended to imply that the objects so described must have a given order, either temporally, spatially, in ranking, or in any other manner.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of the above description, will appreciate that other embodiments are contemplated within the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention, which is defined by the appended claims.

Claims (8)

1. The power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system is characterized by comprising the following steps of:
transmitting signals to the relay according to preset transmitting power, and adjusting the power intensity of the transmitting power until receiving feedback signals of the relay;
receiving a transmitting power adjustment quantity determined by a relay according to a signal parameter statistic value of a subnet node, and adjusting the transmitting power of the subnet node according to the transmitting power adjustment quantity;
time slots of frequency hopping communication between the subnet node and the repeater are acquired, and at the start time of each time slot, the gain of the receiver is adjusted according to the power of the received feedback signal.
2. The method for power control of a multi-subnet unmanned aerial vehicle frequency hopping communication system according to claim 1, wherein the step of adjusting the power strength of the transmission power until receiving the feedback signal of the repeater comprises:
if the feedback signal of the repeater is not received in the preset time slot, the transmitting power is gradually increased until the feedback signal of the repeater is received.
3. The method for controlling power of a frequency hopping communication system of a multi-subnet unmanned aerial vehicle according to claim 1, wherein the signal parameter statistic of the subnet node comprises a signal strength indication value, a signal-to-noise ratio and a receiving error rate.
4. The power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system according to claim 3, wherein the step of the receiving repeater adjusting the transmitting power of the subnet node according to the transmitting power adjustment amount determined according to the signal parameter statistic of the subnet node comprises:
if the signal strength indication value is larger than a first preset value, the signal to noise ratio is smaller than a second preset value or the receiving error rate is higher than a third preset value, increasing the transmitting power of the subnet node, and determining a first adjusting value of the transmitting power;
if the signal strength indication value is smaller than a first preset value and the signal to noise ratio is higher than a second preset value, maintaining the current transmitting power;
if the signal strength indication value is larger than a first preset value and the signal to noise ratio is higher than a second preset value, reducing the transmitting power of the subnet node and determining a second adjusting value of the transmitting power;
and receiving a first adjustment value or a second adjustment value of the transmitting power issued by the relay, and adjusting the transmitting power of the subnet node according to the first adjustment value or the second adjustment value.
5. The method for controlling power of a multi-subnet unmanned aerial vehicle frequency hopping communication system according to claim 1, wherein the step of the subnet node adjusting the gain of the receiver according to the power of the received feedback signal at the start time of each time slot comprises:
the subnet node adjusts the gain of the receiver once in each time slot;
according to the power of the received signal, the gain of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier is regulated, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value;
when the power of the received signal increases, the gain value of any one or more stages of the analog-to-digital converter, the variable gain regulator and the time division duplex amplifier is reduced, so that the signal coding level output by the analog-to-digital converter is a preset maximum coding level value.
6. A power control device of a multi-subnet unmanned aerial vehicle frequency hopping communication system, comprising:
the first adjusting module is suitable for transmitting signals to the relay according to preset transmitting power, and adjusting the power intensity of the transmitting power until receiving feedback signals of the relay;
the second adjusting module is used for receiving the transmitting power adjusting quantity determined by the relay according to the signal parameter statistic value of the subnet node and adjusting the transmitting power of the subnet node according to the transmitting power adjusting quantity;
and the third adjusting module is used for acquiring time slots of frequency hopping communication between the subnet node and the repeater, and adjusting the gain of the receiver according to the power of the received feedback signal at the starting time of each time slot.
7. A drone terminal, comprising:
at least one processor; and
a memory storing program instructions, wherein the program instructions are configured to be adapted to be executed by the at least one processor, the program instructions comprising instructions for performing the power control method of the multi-subnet unmanned aerial vehicle frequency hopping communication system of any of claims 1-5.
8. A readable storage medium storing program instructions that, when read and executed by a drone terminal, cause the drone terminal to perform the power control method of the multi-subnet drone frequency hopping communication system of any one of claims 1-5.
CN202311251825.6A 2023-09-26 2023-09-26 Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system Pending CN117440488A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311251825.6A CN117440488A (en) 2023-09-26 2023-09-26 Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311251825.6A CN117440488A (en) 2023-09-26 2023-09-26 Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system

Publications (1)

Publication Number Publication Date
CN117440488A true CN117440488A (en) 2024-01-23

Family

ID=89556098

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311251825.6A Pending CN117440488A (en) 2023-09-26 2023-09-26 Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system

Country Status (1)

Country Link
CN (1) CN117440488A (en)

Similar Documents

Publication Publication Date Title
US7529528B2 (en) Power consumption controlling apparatus for high frequency amplifier
CN102422684B (en) Allocating transmit power among multiple air interfaces
US20060092889A1 (en) High density WLAN system
CA2519646C (en) Method and system for power control during the traffic channel initialization period in a cdma network
US20090290516A1 (en) Automatic gain control apparatus and method in a wireless communication system
CN102388666A (en) Method and apparatus for managing device-to-device interference
US10826597B2 (en) Interference level variation mitigation for satellite communication systems
US10925063B2 (en) User selection method for non-orthogonal multiple access system and base station thereof
CN108781120B (en) Gain control of a radio frequency RF front end of a base station
WO2013085831A1 (en) Wireless repeater implementing multi-parameter gain management
US9768854B2 (en) Systems and methods for adaptive repeaters
US20200329380A1 (en) Adaptive Channel Orchestration
WO2015100596A1 (en) Method, device and system for suppressing uplink background noise in indoor distributed system
US10028222B2 (en) Apparatus and method for controlling power in a communication system
CN106714292A (en) Optimal power control method based on limited interference power and service quality in cognitive network
CN117440488A (en) Power control method of multi-subnet unmanned aerial vehicle frequency hopping communication system
CN111510935B (en) Uplink signal sending method, receiving method, device and system
Ghazanfari et al. Sum power minimization for cellular systems with underlay D2D communications
WO2022042257A1 (en) Method and device for power configuration
CN103795427A (en) Anti-jamming method and anti-jamming device for wireless communication system
Hasan et al. Channel capacity of dual-branch maximal ratio combining under worst case of fading scenario
US9148852B2 (en) Method and apparatus for controlling receive diversity on a wireless device
TW202105946A (en) Communications apparatus and method for mitigating interference in a communications apparatus
KR20160082096A (en) Interference cancellation repeater
WO2023226928A1 (en) Power control method and relay device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination