50 results about "Software-defined radio" patented technology

The invention discloses an unmanned aerial vehicle flight control method for preventing wireless interference, and belongs to the technical field of multi-unmanned aerial vehicle control. The method comprises the following steps: acquiring and preprocessing an SDR signal; performing interference identification on the preprocessed signal and evaluating an interference identification result; a control strategy optimization framework is constructed based on reinforcement learning, and dynamic updating and optimization of flight control parameters are realized; through a multi-mode communication link and a data temporary storage mechanism, real-time monitoring of a task state in an extreme interference scene is ensured. According to the invention, by constructing a multi-sensor fusion autonomous navigation system, high-precision autonomous positioning and dynamic trajectory correction capability are realized; by introducing an intelligent spectrum decision-making mechanism combining software defined radio SDR and machine learning and utilizing fast Fourier transform FFT and reinforcement learning algorithms, full-band interference identification and adaptive frequency hopping communication capabilities are realized.

The invention discloses an intelligent signal scheduling and management system for a satellite transmission uplink station, particularly relates to the technical field of satellite communication, and innovatively adopts a three-layer architecture of intelligent decision-agile execution-closed loop optimization: a reinforcement learning decision engine based on multi-source data fusion dynamically generates a spectrum-power-modulation joint strategy; millisecond-level reconstruction of carrier parameters is realized through a software-defined radio interface; and disaster recovery switching is triggered by relying on service SLA grading. The problems of resource scheduling rigidness, interference response delay and extensive fault recovery of a traditional uplink station are solved, and the core effects of dynamic optimal distribution of transmission resources, adaptive interference rejection in a complex electromagnetic environment and zero-interruption guarantee of high-value services are achieved.

Systems and methods for direct-to-RF (radio frequency) software-defined radio implementation of an active load-pull system are provided. A system may include a controller, a primary field-programmable gate array (FPGA) to control and collect waveform data from vector signal analyzers (VSAs), each comprising an analog-to-digital converter (ADC) connected to an ADC signal-conditioning circuit to directly capture RF measurements of an input signal at an RF fundamental frequency of test and harmonics, each ADC signal-conditioning circuit altering a signal amplitude and isolating a wanted RF frequency of measurement at either the RF fundamental frequency of test or a harmonic to be received by its ADC, first and second couplers generating each input signal by extracting forward and reverse traveling waves at RF from input and output ports of a device under test (DUT), the VSAs capturing the input signals directly at the RF fundamental frequency of test or a harmonic.

The invention provides a prospecting system and method based on software defined radio, and belongs to the technical field of mineral detection, and the system comprises a software defined radio transmitting device which is used for generating transmitting parameters based on the geological structure and detection requirements of a to-be-detected area, an electromagnetic wave emission signal emitted to the to-be-detected area is generated based on the emission parameter; the software-defined radio receiving equipment is used for receiving electromagnetic wave receiving signals propagated in the to-be-detected area; and the mineral analysis module is used for determining a distortion mode based on the electromagnetic wave transmitting signal and the electromagnetic wave receiving signal, and determining the type and grade of minerals based on the distortion mode. According to the invention, the high flexibility of the software defined radio technology is utilized, rapid adjustment of emission parameters is realized to adapt to different geological structures and detection requirements, and the prospecting efficiency of the system is improved. Meanwhile, mineral detection is achieved based on the distortion mode, manual work is not needed, and the mineral detection accuracy is improved.

The invention belongs to the field of wireless communication security, and discloses an electromagnetic signal confrontation sample generation method based on signal-flow mapping and dynamic disturbance modeling. The method comprises the following steps: firstly, acquiring an original signal by using software-defined radio, dividing a time period by a sliding window, and training a classifier by using TimesNet; extracting time domain and frequency domain characteristics of each fragment, mapping the time domain and frequency domain characteristics into a network flow structure, and selecting core characteristics to set a disturbance target; generating a smooth disturbance curve by adopting a damping second-order kinetic model, adjusting disturbance intensity and speed through parameters, and mapping back to a signal domain to obtain an adversarial sample conforming to physical constraints; and if the classifier fails to be attacked, iteratively optimizing the parameters until success. Experiments show that in wireless identification systems for electric vehicle keys, automobile unlocking and the like, the accuracy rate can be reduced from 95% to 15%, meanwhile, disturbance energy is low, signal forms are kept consistent, and the system has double values of actual combat and testing.

The invention discloses a phase-free antenna measurement method, a phase-free antenna measurement system and a storage medium. The phase-free antenna measurement method comprises the following steps: constructing a measurement system comprising an antenna to be measured, a measurement probe, a fixed auxiliary reference antenna and software defined radio; the probe is controlled to move and sample on the scanning plane, and the SDR synchronously collects receiving signals of the probe and the reference antenna; based on the frequency domain transformation result of the two paths of signals, the radiation field amplitude of each sampling point and the relative phase relative to the reference antenna are directly calculated through non-iterative operation, so that complete complex electric field distribution on the scanning plane is reconstructed; and finally, obtaining a far-field directional diagram through near-field-far-field transformation. The fixed reference antenna is introduced to serve as a phase reference, synchronous acquisition and direct calculation are achieved in combination with the SDR, the antenna radiation field can be rapidly and accurately recovered without direct phase measurement or complex iteration in the single scanning plane and single scanning process, and the method has the advantages of being simple in system, high in measurement efficiency and high in signal drift resistance.

Techniques for processing of satellite sensor data by a mobile ground station are described. A satellite transmission from a tasked satellite is received by a mobile ground station, the satellite transmission including unprocessed downlink data. A software-defined radio (SDR) definition associated with a tasked satellite is selected from a plurality of SDR definitions stored by the mobile ground station. A sensor data processing (SDP) application associated with the tasked satellite is selected from a plurality of SDP applications stored by the mobile ground station. An SDR application is executed to extract the collected sensor data from the unprocessed downlink data, the SDR application is loaded with the selected SDR definition. The selected SDP application is executed to generate a product from the collected sensor data. The product is caused to be displayed on a display device.

The invention relates to the technical field of electronic countermeasures, in particular to an unmanned aerial vehicle group dynamic interception method and system based on distributed interference array collaboration. According to the method, an interference node cluster with autonomous logic association is dynamically deployed in a defense domain, and an elastically reconfigurable distributed interference field domain is formed through a software defined radio architecture; time-varying spectrum features are extracted through an adversarial neural network, and a dynamic threat fingerprint database is constructed; generating an interference vector with frequency band following and power self-adaption based on the dynamic threat fingerprint database, and updating the feature weight of the dynamic threat fingerprint database in real time according to interference efficiency feedback; and according to the situation evolution trend of the dynamic threat fingerprint database, a hierarchical interference wave sequence is generated based on a multi-agent consensus protocol, and a space-time coupled interception chain is formed. Through the method, the whole-process dynamic confrontation capability of the unmanned aerial vehicle group is realized, the efficient interception performance is maintained in a complex electromagnetic environment, and meanwhile, the interference risk on legal communication is reduced.

A radio access network (RAN) system comprises a plurality of capsules that operate in parallel to cooperatively perform RAN stack operations, each capsule utilizing a processor and a memory configured to perform a corresponding component of the RAN stack operations, wherein the plurality of capsules are configured to support slicing functionality to separately process different types of signals; wherein the different types of signals correspond to different data flows, wherein each data flow of the different data flows serves as a pipe to transfer user data from one or more applications in accordance with a corresponding quality of service requirement and wherein the RAN stack operations result in: communicating backhaul communications with a core communication network; communicating fronthaul communications with a plurality of radio units configured to engage in wireless communications with a plurality of user equipment (UEs) via a radio channel of a radio network; converting, in accordance with a communication standard, received fronthaul communications from the plurality of radio units into backhaul communications transmitted to the core communications network; and converting, in accordance with the communication standard, received backhaul communications from the core communications network into fronthaul communications transmitted to the plurality of radio units.

The invention provides an instrument landing waveform design method and system based on an operator component. The method comprises the following steps: S1, carrying out operator splitting on an ILS waveform function; each operator undertakes a single signal processing function, has an independent input / output interface and configurable parameters, and forms a minimum functional unit. And S2, realizing the function of the operator component. For the function of each operator, an input / output interface and a parameter type are designed according to a core signal processing algorithm of an operator assembly. And S3, carrying out universal packaging on the operator assembly. By defining a unified interface standard and establishing an operator registration mechanism, general data stream adaptation and scheduling during operation are realized, and standardized packaging of operator components is completed. And S4, assembling the operator assembly. And assembling the packaged operators according to an ILS signal processing flow to generate a complete ILS waveform signal chain. The waveform component can be rapidly transplanted and deployed in different software defined radio systems, the development and verification period is short, the transportability is high, and the reusability is high.

The present invention relates to the field of wireless communication technology and discloses a rapid networking method for integrating multiple communication devices based on software-defined radio. The method implements information exchange and data transmission between cross-platform and cross-protocol communication devices through four steps: preliminary networking, integrated strategy decision-making and broadcasting, response and integration of direct neighbor devices, and integration of indirect neighbor devices with other devices. A layer-by-layer diffusion integration mechanism is adopted to ensure the orderliness and efficiency of the networking process. This method does not require manual configuration of network parameters, reduces the complexity and cost of networking, and improves the efficiency and flexibility of networking. It is particularly suitable for scenarios requiring fast and flexible networking, such as emergency communications, the Internet of Things, and military communications.

A programmable digitally-controlled oscillator (DCO) for time-domain symbol generation is described in an embodiment. The programmable DCO comprising: an odd number (n) of multi delay cells (MDGs) to form a ring oscillator, the odd number (n) being equal to or more than three, and the odd number (n) of MDCs being adapted to generate n-1 number of multiplexed phases for phase shift keying (PSK) modulation, wherein each of the n number of MDCs comprises: two or more multi jitter cells (MJCs), each of the two or more MJCs being adapted to activate a corresponding delay for tuning a period of one cycle to represent a corresponding bit of a frequency shift keying (FSK) modulation, wherein each of the two of more MJCs comprises: two or more replica basic delay cells (BDCs) configured to adjust jitter, wherein each of the two or more replica BDC is adapted to provide a predetermined jitter target and comprises: two or more sets of reconfigurable inverter gates having different channel lengths and corresponding frequency ranges, the two or more reconfigurable inverter gates being selectable based on a target frequency range. A backscattered software-defined radio (SDR) transmitter system is also described in an embodiment.

A method may use hybrid-TDMA / FDMA frames to synchronize participating nodes to an orchestrator node of a virtual antenna array as the virtual antenna array transmits to a target node. The virtual antenna array is formed by the orchestrator node and the participating nodes. The orchestrator node synchronizes the participating nodes periodically using the hybrid-TDMA / FDMA frames. The virtual antenna array directs joint communications toward and receives communication from the target node. The communication from the target node may be used to learn channel state information (CSI) between the virtual antenna array and the target node. The nodes may include software-defined radios which execute the hybrid-TDMA / FDMA frames. The hybrid-TDMA / FDMA frames may include concurrent transmissions of signal data and metadata. The hybrid-TDMA / FDMA frames may decouple the duty-cycle from the number of nodes.

This application proposes a method and system for transmitting time synchronization signals based on general-purpose software-defined radio (SDR). The method includes: constructing a time synchronization signal data frame based on input time information; performing direct sequence spread spectrum (DSSS) on the time synchronization signal data frame to obtain a spread digital sequence; modulating and mapping the spread digital sequence into a digital baseband IQ signal; transmitting the digital baseband IQ signal to a general-purpose software-defined radio peripheral; processing the signal through the peripheral; transmitting it via an antenna; and performing time delay calibration on the system before transmission to compensate for internal system delays. This application, by employing a software-defined radio architecture combined with a high-precision clock reference, achieves software-based, general-purpose, and high-precision processing throughout the entire process of time synchronization signal generation, processing, transmission, and calibration. The overall approach offers multiple advantages, including high flexibility, high precision, high reliability, low cost, easy scalability, and open research potential.

A radio access network (RAN) system comprises a plurality of capsules that operate in parallel to cooperatively perform RAN stack operations corresponding to a plurality of RAN stacks, each capsule utilizing a processor and a memory configured to perform a corresponding component of the RAN stack operations, wherein the RAN stack operations result in: communicating backhaul communications with a core communications network; communicating fronthaul communications with a plurality of radio units configured to engage in wireless communications with a plurality of user equipment (UEs) via a radio channel of a radio network; converting, in accordance with a communication standard, received fronthaul communications from the plurality of radio units into backhaul communications transmitted to the core communications network; and converting, in accordance with the communication standard, received backhaul communications from the core communications network into fronthaul communications.

Techniques for sharing resources between a radio access technology (RAT) modem (e.g., an LTE modem) and a processor-based radio (e.g., a software-defined radio) are described. In an example, operation of the RAT modem establishes an extended discontinuous reception mode (eDRX) cycle with a cellular system. The RAT modem sends eDRX scheduling information, that is based at least in part on the eDRX cycle, to the processor-based radio. Operation of the processor-based radio identifies paging opportunities (POs) of the eDRX cycle, based at least in part on the eDRX scheduling information. Operation of the processor-based radio manages usage of shared resources (e.g., transmit and receive amplifiers, digital signal processing elements, memory devices, elements of physical layer(s), and / or antenna(s), etc.). The managing may be based at least in part on the identified POs. The managing avoids conflicts between the RAT modem and the processor-based radio over the shared resources.

Methods and systems are described herein for adaptive beamforming and ultra-low frequency GPR surveying using a time synchronized distributed sensor array system ("distributed system"). The distributed system may be a software-defined radio using multi-input- multi-output antenna elements. The distributed system includes multiple sensor nodes which are time synchronized using status information from a sensor node (e.g., timestamp of an occurrence of an event such as receipt of a request for local timestamp, a receipt of a calibration signal). The synchronized distributed system enables the generation of an adaptive beam profile that directs high-directionality beams toward desired targets (e.g., geological features, resource deposits, drill bits, etc.) while cohering the low-frequency signal to generate viable range resolutions and SNR at depths greater than 5000 meters. Further, the distributed system makes use of a scalable multistatic array to provide telecommunication and electromagnetic wave manipulation operations for applications of varying scale.

This disclosure describes the operating concept and medium access control protocols of a wireless communication system that uses Code Division Multiple Access with Interference Avoidance (CDMA-IA) as its physical layer. The system can dynamically share a common band with other networks without a central radio resource controller. In one embodiment, the wireless communication system includes several radio nodes forming a wireless mesh network, where pairs of radio nodes use individually optimized time-division duplexing. At least one radio node includes a software-defined radio, memory, and an electronic processor. The electronic processor is configured to control the software-defined radio to transmit a pilot signal and share various status information with the other nodes in the network.The shared information includes local spectrum usage and node connectivity sets. The dominant sharing of spectrum usage among all nodes allows for maximizing the use of the shared band.

The present application relates to the technical field of electronic countermeasure, in particular to a method and system for dynamic interception of UAV group based on distributed jamming array cooperation. The method deploys a cluster of jamming nodes with autonomous logical association in the defense domain dynamically, forms a distributed jamming field with elastic reconfiguration through software-defined radio architecture; extracts time-varying spectral features through adversarial neural network, and constructs a dynamic threat fingerprint library; generates a jamming vector with frequency band following and power self-adaptation based on the dynamic threat fingerprint library, and updates the feature weight of the dynamic threat fingerprint library in real time according to the jamming effectiveness feedback; generates a hierarchical jamming wave sequence based on the multi-agent consensus protocol according to the trend of the situation evolution of the dynamic threat fingerprint library, and forms a time-space coupled interception chain. The present application realizes the whole process dynamic countermeasure capability of UAV group, maintains high efficient interception performance in complex electromagnetic environment, and reduces the interference risk to legal communication.

The invention discloses an artificial rainfall experimental method based on software-defined radio, and the method comprises the steps: building an experimental system based on software-defined radio, and enabling the experimental system to comprise a software-defined radio transmitting module, a receiving module, an artificial rainfall device, an experimental environment control module and a data processing terminal, an artificial rainfall device is used for simulating environments with different rainfall intensities, and the rainfall intensities are monitored in real time; a preset test signal is generated and sent at a software-defined radio transmitting end, and a receiving end collects the signal and extracts channel state information; analyzing characteristic changes of channel state information data under different rainfall intensities, and extracting parameters such as signal amplitude attenuation and phase deviation; a mathematical model between rainfall intensity and signal characteristic changes is established, and the rainfall attenuation law is researched. Accurate analysis of the relation between the channel state information and the rainfall intensity under the artificial rainfall condition is achieved, the experimental environment is controllable, the result repeatability is high, and an important basis is provided for detecting environmental rainfall through wireless microwave signals.

The application belongs to the technical field of navigation positioning, and specifically provides a high-precision positioning signal test system based on a software-defined radio (SDR) platform, which comprises a transmitting module, a receiving module, a demodulation and analysis module and a power module; the transmitting module generates positioning signals and transmits them into space; the receiving module receives the positioning signals and performs digital processing; the demodulation and analysis module demodulates and analyzes the digital signals after digital processing, extracts positioning messages, and evaluates signal coverage performance and positioning accuracy; and the power module supplies power to each module; as described above, the application can realize the modulation and demodulation of Beidou signal systems and the processing of navigation signals on the SDR platform, receive and process positioning signals in the 4800MHz-4900MHz frequency band, extract navigation positioning messages, and evaluate signal coverage performance and positioning accuracy.

The application relates to the technical field of wireless communication, in particular to a multi-band dynamic reconfigurable switching system based on software-defined radio, which comprises an environment sensing module, a frequency band analysis module, a reconfiguration decision module, a switching execution module and a verification module; wherein: the environment sensing module is used for collecting original time domain signals; the frequency band analysis module is used for generating a feature list of available frequency bands; the reconfiguration decision module is used for calculating comprehensive scores of each frequency band and generating corresponding reconfiguration configuration instructions; the switching execution module is used for configuring an SDR radio frequency front end; and the verification module is used for detecting whether to confirm a response. Through real-time sensing of a multi-band environment, intelligent decision and self-verification switching, the application constructs a dynamic wireless communication system with high-precision spectrum identification and rapid reconfiguration capability, thereby significantly improving communication stability and spectrum utilization efficiency.

The invention relates to the technical field of computers, and discloses an electronic tag online detecting and marking method and system. The method comprises the following steps: modeling a software defined radio detection node as a cellular automaton cell; constructing a distributed non-cooperative game model based on neighborhood information, and optimizing conflict probability and energy consumption by taking frequency and power as strategy space; dynamically adjusting radio frequency parameters and broadcasting the state; executing self-organizing anti-conflict detection, and identifying effective tags through matching of signal intensity and timestamps; and generating and writing a unique mark instruction. The system is composed of a plurality of detection nodes with state sensing and game decision-making capabilities. According to the scheme, high throughput, low conflict rate, high robustness and energy efficiency optimization in an ultra-high density scene are realized.

The invention provides an airborne communication identification navigation system detector and a detection method thereof, relates to the technical field of test and maintenance of avionics equipment, and solves the problem that the existing airborne communication identification navigation system detection equipment is difficult to meet the rapid, comprehensive and intelligent maintenance requirements of an external field. In the detector, a core processing and control unit is constructed based on a general processing platform, a programmable logic device and a software-defined radio transceiver module, and is used for executing overall control, a signal processing algorithm and protocol analysis; the multi-band radio frequency conditioning unit comprises a configurable digital-to-analog conversion channel, an analog-to-digital conversion channel and a plurality of radio frequency conditioning channels, and is used for carrying out sending conditioning and receiving conditioning on radio frequency signals of different bands; the integrated interface unit comprises a multi-band antenna interface used for being connected with antennas of different bands and a man-machine interaction interface used for providing operation display. According to the invention, one-machine multi-purpose comprehensive detection of a plurality of airborne communication identification navigation devices on one platform can be efficiently realized.

The present disclosure describes systems, apparatuses, methods, and computer-readable media for multi-channel software-defined radio (SDR) audio transceivers, multi-user audio systems using the same, and methods of using the same. SDR audio transceivers can comprise an antenna and / or radio transmitter. SDR audio transceivers can be configured for multi-channel audio transmission. The multi-channel audio transmission can include wideband channels or channels allocated across a wideband of spectrum. The multi-channel audio transmission can include narrowband channels or channels allocated to a relatively narrower band of spectrum.

This invention discloses an integrated VHF tactical radio based on software-defined radio (SDR), belonging to the field of VHF tactical communication and electronic warfare. It utilizes an AD9361 RF transceiver and a Zynq-7020 SoC chip to construct an SDR hardware platform, supporting full-band signal processing from 30MHz to 1000MHz. The system integrates three major functional modules: communication, reconnaissance, and jamming. The communication software supports AM / FM analog and BPSK / 16QAM digital communication with a hopping rate of up to 1000 hops / second. The reconnaissance software achieves 1GHz / s spectrum scanning through an FFT algorithm, combined with a machine learning model to achieve an identification accuracy of over 95%. The jamming software supports three modes: fixed-frequency suppression, frequency sweeping jamming, and forwarding deception, and possesses 100% friendly signal evasion capability. This invention achieves 20ms periodic spectrum monitoring, automatic identification of friend or foe signals, adaptive selection of jamming patterns, and intelligent power adjustment, forming a closed-loop control system. The device has a volume ≤2L and a weight ≤3kg, suitable for both vehicle-mounted and individual soldier deployments, significantly improving the overall combat effectiveness of tactical communication.

The invention provides a firmware loading method and device based on dual-chip collaboration, belongs to the field of software defined radio, and is used for solving the problems of poor efficiency and flexibility of firmware loading in modern electronic equipment in related technologies. The firmware loading device gives consideration to loading efficiency and flexibility, the firmware loading method can enable the firmware loading device to analyze and determine a strategy for loading firmware by a vacant cache chip in the firmware loading device based on a perceived environment and data experience, and intelligent firmware loading for the firmware loading device is realized. Therefore, the performance of the firmware loading device can be further improved.

Aspects of the subject disclosure may include, for example, a system including a cross-segment slice controller (CSSC) configured to interface with a software-defined network (SDN) controller and a software-defined radio (SDR) controller. The SDN controller may be associated with a core network and the SDR controller may be associated with a radio access network (RAN). The system further includes a machine learning (ML) component configured to obtain and analyze data regarding the core network and the RAN, and an intelligent end-to-end (E2E) orchestration platform (IEOP) configured to coordinate with the SDN controller and the SDR controller via the CSSC based on outputs of the ML component to provide dynamic cross-segment network slice management. Other embodiments are disclosed.