Method and apparatus for dynamic configuration of OFDM subcarrier parameters based on interference awareness

Abstract

The application relates to an OFDM subcarrier parameter dynamic configuration method and device based on interference sensing, and belongs to the technical field of wireless communication. The method comprises the following steps: through real-time sensing of the interference condition of a target frequency band, an interference spectrum diagram is constructed, dynamic subcarrier mapping decision is conducted, an optimal subcarrier parameter configuration strategy under the current interference condition is acquired, and corresponding subcarrier parameter configuration information is dynamically generated; the subcarrier parameter configuration information is sent from a transmitting end to a receiving end, and an OFDM signal generated by modulation based on the subcarrier parameter configuration information is sent to the receiving end; the receiving end demodulates the received OFDM signal according to the configuration, communication quality monitoring is conducted according to the demodulation result, when the communication quality is lower than an expected target, the subcarrier parameter dynamic configuration is repeated, and when the communication quality reaches the expected target, communication is continued according to the current subcarrier parameter configuration information. The method can realize the balance between interference avoidance and spectrum resource optimization.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a method and apparatus for dynamic configuration of OFDM subcarrier parameters based on interference awareness. Background Technology

[0002] OFDM (Orthogonal Frequency Division Multiplexing) technology is widely used in modern wireless communication systems due to its high spectral efficiency and resistance to multipath fading. However, traditional OFDM systems have the following technical drawbacks: First, fixed carrier configuration: the subcarrier frequencies, spacing, and number of subcarriers in traditional OFDM systems are usually determined during the system design phase, lacking dynamic adjustment capabilities. Second, limited anti-interference capability: facing dynamically changing interference environments, fixed subcarrier configurations cannot effectively avoid interfering frequency bands. Third, low spectrum utilization: when some frequency bands are interfered with, the system continues to use damaged subcarriers, which not only increases the bit error rate but also reduces the system's effective spectrum utilization.

[0003] To address these challenges, existing technologies often employ strategies such as frequency hopping or adaptive modulation and coding. Frequency hopping avoids interference by periodically switching the operating frequency band, but it typically hops on an entire frequency band basis, making it impossible to finely control parameters such as frequency, bandwidth, and power of individual subcarriers. While adaptive modulation and coding can adjust the modulation order and coding rate to adapt to channel conditions, it does not change the resource configuration of the subcarriers themselves, thus still exhibiting significant performance bottlenecks in scenarios with uneven interference distribution.

[0004] In summary, traditional OFDM systems still have shortcomings in interference avoidance, and there is an urgent need to develop enhanced transmission schemes with flexible subcarrier-level configuration capabilities. Summary of the Invention

[0005] Therefore, it is necessary to provide a method and apparatus for dynamic configuration of OFDM subcarrier parameters based on interference awareness to address the aforementioned technical problems.

[0006] A method for dynamic configuration of OFDM subcarrier parameters based on interference awareness, the method comprising: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include subcarrier frequency, bandwidth and power. Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver. Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0007] In one embodiment, an interference spectrum map is constructed by performing full-band scanning and real-time interference sensing on the target frequency band, including: During idle communication time slots, the transmitter performs full-band scanning and real-time interference sensing of the target frequency band. It also uses a fast Fourier transform algorithm to analyze the real-time power spectral density of the interference signal and identify the type of interference. The interference spectrum map is then constructed, and the center frequency, bandwidth, and intensity of the interference are marked in the map.

[0008] In one embodiment, dynamic subcarrier mapping decision-making is performed based on the interference spectrum to obtain the optimal subcarrier parameter configuration strategy under the current interference conditions, including: Based on the interference signal information shown in the interference spectrum diagram, dynamic subcarrier mapping decisions are made to obtain the optimal subcarrier parameter configuration strategy under the current interference conditions, including avoidance strategies, water-filling strategies, and randomization strategies; the mechanism of dynamic subcarrier mapping decision-making includes: When the operating frequency band of the interference signal is relatively concentrated and occupies a relatively small proportion relative to the available operating frequency without interference, that is, when the operating frequency band without interference is sufficient to cover the effective signal bandwidth, an avoidance strategy is selected. The avoidance strategy is used to avoid frequency bands where the interference intensity exceeds the first threshold, and to configure the subcarriers in clean frequency bands where the interference intensity is lower than the second threshold, and to use the same subcarrier frequency spacing. Wherein the first threshold is higher than the second threshold. When the operating frequency bands of interfering signals are relatively dispersed and constitute a large proportion of the available operating frequencies without interference (i.e., when the interference-free operating frequency bands are discontinuous), a water-filling strategy is selected. This strategy involves densely configuring subcarriers within the interference-free operating frequency bands and sparsely configuring subcarriers within the interfering operating frequency bands. The subcarrier spectral density of each frequency band is adaptively adjusted based on the available operating frequencies without interference. The presence of interference in the operating frequency band is determined based on the signal-to-noise ratio (SNR) of the effective signal within the operating frequency band. If the SNR is higher than a preset signal demodulation threshold, it is considered interference-free; if the SNR is lower than the signal demodulation threshold, it is considered interference-free. When the interference signal is a tracking interference or interception interference, a randomization strategy is selected. The randomization strategy is used to generate subcarrier frequencies using chaotic sequences or pseudo-random sequences, so that the subcarriers are randomly distributed in the interference-free operating frequency band.

[0009] In one embodiment, the transmitting end sends subcarrier parameter configuration information to the receiving end, including: The transmitter sets a dedicated configuration information identifier in the physical layer frame header of the subcarrier parameter configuration information and transmits the subcarrier parameter configuration information to the receiver in the control channel. The configuration information identifier includes the mapping decision identifier, the number of subcarriers, the subcarrier frequency list, and the mapping parameters.

[0010] In one embodiment, the OFDM signal is modulated and generated based on subcarrier parameter configuration information, including: At the transmitting end, the number of points and parameters of the inverse fast Fourier transform are adjusted according to the subcarrier parameter configuration information to generate an OFDM signal with non-uniform subcarrier spacing.

[0011] An OFDM subcarrier parameter dynamic configuration device based on interference sensing, the device comprising: an interference sensing module, a dynamic subcarrier mapping module, and an information transmission and signal generation module located at the transmitting end, and a signal reception and demodulation module and a communication quality monitoring module located at the receiving end; The interference sensing module is used to construct an interference spectrum map by performing full-band scanning and real-time interference sensing of the target frequency band; The dynamic subcarrier mapping module includes a strategy selector and a configuration parameter generator. The strategy selector is used to make dynamic subcarrier mapping decisions based on the interference spectrum and obtain the optimal subcarrier parameter configuration strategy under the current interference conditions. The configuration parameter generator is used to allocate an operating frequency to each subcarrier using the optimal subcarrier parameter configuration strategy and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include subcarrier frequency, bandwidth and power. The information transmission and signal generation module is used to send subcarrier parameter configuration information to the receiving end and send the OFDM signal generated based on the subcarrier parameter configuration information to the receiving end. The signal receiving and demodulation module is used to demodulate the received OFDM signal according to the subcarrier parameter configuration information; The communication quality monitoring module is used to monitor the communication quality based on the demodulation results. When the communication quality is lower than the expected target, it repeatedly calls the interference sensing module, the dynamic subcarrier mapping module, and the information transmission and signal generation module to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, it continues to communicate according to the current subcarrier parameter configuration information.

[0012] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program performing the following steps: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include subcarrier frequency, bandwidth and power. Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver. Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0013] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following steps when executed by a processor: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include subcarrier frequency, bandwidth and power. Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver. Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0014] The aforementioned OFDM subcarrier parameter dynamic configuration method and apparatus based on interference perception constructs an interference spectrum map and makes dynamic subcarrier mapping decisions by sensing the interference situation of the target frequency band in real time. This enables the dynamic configuration of subcarrier parameters using the optimal subcarrier parameter configuration strategy for different interference situations, ensuring that subcarrier resource configuration information is bound to the interference environment in real time. This provides backward compatibility with traditional OFDM systems and improves the dynamic anti-interference capability of OFDM systems. Furthermore, after signal demodulation according to the subcarrier parameter configuration information, the dynamic configuration of subcarrier parameters is continuously performed based on communication quality monitoring. This avoids the unavailability of atomic carriers due to frequency band interference changes and allows for timely switching to new optimal subcarrier parameter configuration strategies for communication, thereby achieving higher spectrum utilization and stronger anti-interference capability. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating an interference-aware OFDM subcarrier parameter dynamic configuration method in one embodiment. Figure 2 This is a schematic diagram illustrating the implementation steps of an interference-aware OFDM subcarrier parameter dynamic configuration method in one embodiment. Figure 3 This is a structural diagram of an OFDM subcarrier parameter dynamic configuration device based on interference awareness in one embodiment. Figure 4 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0017] In one embodiment, such as Figure 1 and Figure 2 As shown, an interference-aware OFDM subcarrier parameter dynamic configuration method is provided, including the following steps: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band.

[0018] Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information, including subcarrier frequency, bandwidth and power.

[0019] Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver.

[0020] Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0021] The aforementioned OFDM subcarrier parameter dynamic configuration method based on interference awareness constructs an interference spectrum map and makes dynamic subcarrier mapping decisions by sensing the interference changes in the target frequency band in real time. This enables the optimal subcarrier parameter configuration strategy to be adopted for dynamic subcarrier parameter configuration under different interference conditions, ensuring that subcarrier resource configuration information is bound to the interference environment in real time. It is backward compatible with traditional OFDM systems and improves the dynamic anti-interference capability of OFDM systems. Furthermore, after signal demodulation according to the subcarrier parameter configuration information, the method continuously performs dynamic subcarrier parameter configuration based on communication quality monitoring. This avoids the unavailability of atomic carriers due to frequency band interference changes and allows timely switching to new optimal subcarrier parameter configuration strategies for communication, thereby achieving higher spectrum utilization and stronger anti-interference capability.

[0022] In one embodiment, an interference spectrum map is constructed by performing full-band scanning and real-time interference sensing on the target frequency band. This includes: the transmitter performing full-band scanning and real-time interference sensing on the target frequency band during communication idle time slots, and using a fast Fourier transform algorithm to analyze the real-time power spectral density of the interference signal and identify the interference type, thereby constructing an interference spectrum map and marking the interference center frequency, bandwidth, and intensity in the map.

[0023] In one embodiment, dynamic subcarrier mapping decision-making is performed based on the interference spectrum diagram to obtain the optimal subcarrier parameter configuration strategy under the current interference situation. This includes: performing dynamic subcarrier mapping decision-making based on the interference signal information shown in the interference spectrum diagram to obtain the optimal subcarrier parameter configuration strategy under the current interference situation, including avoidance strategies, water-filling strategies, and randomization strategies. The mechanism of dynamic subcarrier mapping decision-making includes: 1. When the operating frequency band of the interference signal is relatively concentrated and occupies a relatively small proportion relative to the available operating frequency without interference, that is, when the operating frequency band without interference is sufficient to cover the effective signal bandwidth, an avoidance strategy is selected. The avoidance strategy is used to avoid frequency bands where the interference intensity exceeds the first threshold, and to configure the subcarriers in clean frequency bands where the interference intensity is lower than the second threshold, and to use the same subcarrier frequency spacing. The first threshold is higher than the second threshold.

[0024] 2. When the operating frequency bands of interfering signals are relatively dispersed and account for a large proportion of the available operating frequencies without interference (i.e., when the interference-free operating frequency bands are discontinuous), a water-filling strategy is selected. The water-filling strategy is used to densely configure subcarriers in the interference-free operating frequency bands and sparsely configure subcarriers in the interfering operating frequency bands, and adaptively adjust the subcarrier spectral density of each frequency band according to the available operating frequencies without interference. The presence of interference in the operating frequency band can be judged based on indicators such as the signal-to-noise ratio (SNR) of the effective signal in the operating frequency band. When the SNR is higher than the preset signal demodulation threshold (usually determined by the system), it is determined to be interference-free; when the SNR is lower than the signal demodulation threshold, it is determined to be interference-free.

[0025] 3. When the interference signal is a tracking interference or interception interference, a randomization strategy is selected. The randomization strategy is used to generate subcarrier frequencies using chaotic sequences or pseudo-random sequences, so that the subcarriers are randomly distributed in the interference-free operating frequency band.

[0026] It should be understood that the avoidance strategy involves adjusting the subcarrier frequency and bandwidth to avoid the influence of strong interference frequency bands. This effectively improves anti-interference capability. Furthermore, by using the same subcarrier frequency spacing, interference signals can be avoided without affecting transmission efficiency. Simultaneously, the complexity of the subcarrier generation algorithm is reduced, thus effectively saving computing units, lowering system costs, and reducing system power consumption. The water-filling strategy ensures that most subcarriers operate in interference-free frequency bands, effectively resisting the influence of interference signals and maximizing system transmission efficiency. This results in a capacity increase of over 30% in interference environments, avoiding wasted transmission resources in damaged frequency bands. The randomization strategy makes signal characteristics difficult to identify and track, and the dynamically changing signal fingerprint increases the difficulty of interference, resulting in strong anti-interference capability. While being difficult to intercept, it also provides limited resistance to tracking interference. Furthermore, after obtaining the optimal subcarrier parameter configuration strategy, the optimal subcarrier parameter configuration strategy is further adopted to allocate a working frequency to each subcarrier, and the corresponding subcarrier parameter configuration information is dynamically generated. This makes the subcarrier parameters (frequency, bandwidth, power, etc.) no longer fixed, but can be dynamically and finely adjusted according to the real-time channel status and interference environment, thereby achieving higher spectrum utilization and stronger anti-interference capability.

[0027] In one embodiment, the transmitting end sends subcarrier parameter configuration information to the receiving end, including: the transmitting end setting a dedicated configuration information identifier in the physical layer frame header of the subcarrier parameter configuration information, and transmitting the subcarrier parameter configuration information to the receiving end in the control channel; the configuration information identifier includes a mapping decision identifier, the number of subcarriers, a subcarrier frequency list, and mapping parameters. The control channel is used to transmit signaling or synchronization data, and depending on the required function, the control channel can be defined as one of three types: broadcast, public, and dedicated control channels.

[0028] It should be understood that the configuration information identifier enables the receiver to efficiently and accurately parse and obtain the currently selected optimal subcarrier parameter configuration strategy and corresponding configuration when it receives the subcarrier parameter configuration information. This allows the receiver to adjust the number of points and parameters of the Fast Fourier Transform (FFT) for OFDM signal demodulation, thereby improving the efficiency and accuracy of signal demodulation.

[0029] In one embodiment, the OFDM signal is modulated and generated based on subcarrier parameter configuration information, including: at the transmitting end, adjusting the number of points and parameters of the inverse fast Fourier transform (IFFT) according to the subcarrier parameter configuration information to modulate and generate an OFDM signal with non-uniform subcarrier spacing.

[0030] In one embodiment, such as Figure 3 As shown, an OFDM subcarrier parameter dynamic configuration device based on interference awareness is provided, including: an interference awareness module, a dynamic subcarrier mapping module, and an information transmission and signal generation module located at the transmitting end, and a signal reception and demodulation module and a communication quality monitoring module located at the receiving end.

[0031] The interference sensing module is used to construct an interference spectrum map by performing full-band scanning of the target frequency band and real-time interference sensing.

[0032] The dynamic subcarrier mapping module includes a strategy selector and a configuration parameter generator. The strategy selector is used to make dynamic subcarrier mapping decisions based on the interference spectrum and obtain the optimal subcarrier parameter configuration strategy under the current interference conditions. The configuration parameter generator is used to allocate an operating frequency to each subcarrier using the optimal subcarrier parameter configuration strategy and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include parameters such as subcarrier frequency, bandwidth, and power.

[0033] The information transmission and signal generation module is used to send subcarrier parameter configuration information to the receiving end and send the OFDM signal generated based on the subcarrier parameter configuration information to the receiving end.

[0034] The signal receiving and demodulation module is used to demodulate the received OFDM signal according to the subcarrier parameter configuration information.

[0035] The communication quality monitoring module is used to monitor the communication quality based on the demodulation results. When the communication quality is lower than the expected target, it repeatedly calls the interference sensing module, the dynamic subcarrier mapping module, and the information transmission and signal generation module to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, it continues to communicate according to the current subcarrier parameter configuration information.

[0036] Specific limitations regarding the interference-aware OFDM subcarrier parameter dynamic configuration device can be found in the limitations of the interference-aware OFDM subcarrier parameter dynamic configuration method described above, and will not be repeated here. Each module in the aforementioned interference-aware OFDM subcarrier parameter dynamic configuration device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0037] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used to communicate with external terminals via a network connection. When executed by the processor, the computer program implements a dynamic configuration method for OFDM subcarrier parameters based on interference awareness. The display screen can be a liquid crystal display (LCD) or an e-ink display. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0038] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0039] In one embodiment, a computer device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to perform the following steps: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include parameters such as subcarrier frequency, bandwidth and power. Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver. Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0040] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and assign a working frequency to each subcarrier by adopting the optimal subcarrier parameter configuration strategy, and dynamically generate the corresponding subcarrier parameter configuration information. The subcarrier parameters include parameters such as subcarrier frequency, bandwidth and power. Step 3: The transmitter sends subcarrier parameter configuration information to the receiver and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiver. Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation results. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information.

[0041] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A method for dynamic configuration of OFDM subcarrier parameters based on interference awareness, characterized in that, The method includes: Step 1: Construct an interference spectrum map by performing full-band scanning and real-time interference sensing on the target frequency band; Step 2: Make dynamic subcarrier mapping decisions based on the interference spectrum diagram, obtain the optimal subcarrier parameter configuration strategy under the current interference situation, and dynamically generate corresponding subcarrier parameter configuration information by assigning a working frequency to each subcarrier using the optimal subcarrier parameter configuration strategy. The subcarrier parameters include subcarrier frequency, bandwidth and power. Step 3: The transmitting end sends the subcarrier parameter configuration information to the receiving end, and sends the OFDM signal generated based on the subcarrier parameter configuration information to the receiving end; Step 4: The receiving end demodulates the received OFDM signal according to the subcarrier parameter configuration information and monitors the communication quality based on the demodulation result. When the communication quality is lower than the expected target, steps 1 to 3 are repeated to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information. The process of making dynamic subcarrier mapping decisions based on the interference spectrum to obtain the optimal subcarrier parameter configuration strategy under the current interference conditions includes: Based on the interference signal information shown in the interference spectrum diagram, dynamic subcarrier mapping decisions are made to obtain the optimal subcarrier parameter configuration strategy under the current interference conditions, including avoidance strategies, water-filling strategies, and randomization strategies; the mechanism of dynamic subcarrier mapping decision-making includes: When the operating frequency band of the interference signal is relatively concentrated and occupies a relatively small proportion relative to the available operating frequency without interference, that is, when the operating frequency band without interference is sufficient to cover the effective signal bandwidth, an avoidance strategy is selected; the avoidance strategy is used to avoid frequency bands where the interference intensity exceeds a first threshold, and to configure subcarriers in clean frequency bands where the interference intensity is lower than a second threshold, and to use the same subcarrier frequency spacing; wherein the first threshold is higher than the second threshold. When the operating frequency bands of interfering signals are relatively dispersed and account for a large proportion of the available operating frequencies without interference (i.e., when the operating frequency bands without interference are discontinuous), a water-filling strategy is selected. This strategy involves densely configuring subcarriers within the interference-free operating frequency bands and sparsely configuring subcarriers within the interfering operating frequency bands. The subcarrier spectral density of each frequency band is adaptively adjusted based on the available operating frequencies without interference. The presence of interference in the operating frequency band is determined based on the signal-to-noise ratio (SNR) of the effective signal within the operating frequency band. When the SNR is higher than a preset signal demodulation threshold, it is determined to be interference-free; when the SNR is lower than the signal demodulation threshold, it is determined to be interference-free. When the interference signal is a tracking interference or interception interference, a randomization strategy is selected; the randomization strategy is used to generate subcarrier frequencies using chaotic sequences or pseudo-random sequences, so that the subcarriers are randomly distributed in the interference-free operating frequency band.

2. The method for dynamic configuration of OFDM subcarrier parameters based on interference awareness according to claim 1, characterized in that, By performing full-band scanning of the target frequency band and real-time interference sensing, an interference spectrum map is constructed, including: During idle communication time slots, the transmitter performs full-band scanning and real-time interference sensing of the target frequency band. It also uses a fast Fourier transform algorithm to analyze the real-time power spectral density of the interference signal and identify the type of interference. The interference spectrum map is then constructed, and the center frequency, bandwidth, and intensity of the interference are marked in the map.

3. The method for dynamic configuration of OFDM subcarrier parameters based on interference awareness according to claim 1, characterized in that, The transmitting end sends the subcarrier parameter configuration information to the receiving end, including: The transmitting end sets a dedicated configuration information identifier in the physical layer frame header of the subcarrier parameter configuration information, and transmits the subcarrier parameter configuration information to the receiving end in the control channel; the configuration information identifier includes a mapping decision identifier, the number of subcarriers, a subcarrier frequency list, and mapping parameters.

4. The method for dynamic configuration of OFDM subcarrier parameters based on interference awareness according to claim 3, characterized in that, Based on the subcarrier parameter configuration information, OFDM signals are modulated and generated, including: At the transmitting end, the number of points and parameters of the inverse fast Fourier transform are adjusted according to the subcarrier parameter configuration information to modulate and generate an OFDM signal with non-uniform subcarrier spacing.

5. A device for dynamic configuration of OFDM subcarrier parameters based on interference awareness, characterized in that, The device includes: an interference sensing module, a dynamic subcarrier mapping module, and an information transmission and signal generation module located at the transmitting end, and a signal reception and demodulation module and a communication quality monitoring module located at the receiving end. The interference sensing module is used to construct an interference spectrum map by performing full-band scanning and real-time interference sensing of the target frequency band. The dynamic subcarrier mapping module includes a strategy selector and a configuration parameter generator. The strategy selector is used to make dynamic subcarrier mapping decisions based on the interference spectrum diagram to obtain the optimal subcarrier parameter configuration strategy under the current interference situation. The configuration parameter generator is used to allocate an operating frequency to each subcarrier using the optimal subcarrier parameter configuration strategy and dynamically generate corresponding subcarrier parameter configuration information. The subcarrier parameters include subcarrier frequency, bandwidth, and power. The information transmission and signal generation module is used to send the subcarrier parameter configuration information to the receiving end, and send the OFDM signal generated based on the subcarrier parameter configuration information to the receiving end. The signal receiving and demodulation module is used to demodulate the received OFDM signal according to the subcarrier parameter configuration information; The communication quality monitoring module is used to monitor the communication quality based on the demodulation results. When the communication quality is lower than the expected target, the interference sensing module, the dynamic subcarrier mapping module, and the information transmission and signal generation module are repeatedly called to dynamically configure the subcarrier parameters until the communication quality reaches the expected target. Then, communication continues according to the current subcarrier parameter configuration information. Based on the interference spectrum diagram, a dynamic subcarrier mapping decision is made to obtain the optimal subcarrier parameter configuration strategy under the current interference condition, including: Based on the interference signal information shown in the interference spectrum diagram, dynamic subcarrier mapping decisions are made to obtain the optimal subcarrier parameter configuration strategy under the current interference conditions, including avoidance strategies, water-filling strategies, and randomization strategies; the mechanism of dynamic subcarrier mapping decision-making includes: When the operating frequency band of the interference signal is relatively concentrated and occupies a relatively small proportion relative to the available operating frequency without interference, that is, when the operating frequency band without interference is sufficient to cover the effective signal bandwidth, an avoidance strategy is selected; the avoidance strategy is used to avoid frequency bands where the interference intensity exceeds a first threshold, and to configure subcarriers in clean frequency bands where the interference intensity is lower than a second threshold, and to use the same subcarrier frequency spacing; wherein the first threshold is higher than the second threshold. When the operating frequency bands of interfering signals are relatively dispersed and account for a large proportion of the available operating frequencies without interference (i.e., when the operating frequency bands without interference are discontinuous), a water-filling strategy is selected. This strategy involves densely configuring subcarriers within the interference-free operating frequency bands and sparsely configuring subcarriers within the interfering operating frequency bands. The subcarrier spectral density of each frequency band is adaptively adjusted based on the available operating frequencies without interference. The presence of interference in the operating frequency band is determined based on the signal-to-noise ratio (SNR) of the effective signal within the operating frequency band. When the SNR is higher than a preset signal demodulation threshold, it is determined to be interference-free; when the SNR is lower than the signal demodulation threshold, it is determined to be interference-free. When the interference signal is a tracking interference or interception interference, a randomization strategy is selected; the randomization strategy is used to generate subcarrier frequencies using chaotic sequences or pseudo-random sequences, so that the subcarriers are randomly distributed in the interference-free operating frequency band.

6. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 4.

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