236 results about "Software define radio" patented technology

The invention relates to the field of wireless communication and intelligent networks, in particular to a software defined radio-based ad hoc network dynamic slicing architecture and a management and control method, comprising a basic communication layer, an intelligent control layer and a service execution layer. The basic communication layer adopts a multi-distribution multi-center clustering architecture; the intelligent control layer is responsible for intelligent management and resource scheduling of the self-organizing network, and the intelligent control layer comprises a plurality of command and control nodes; and the service execution layer adopts a micro-service-based architecture, and encapsulates different network functions and service logics into independent micro-service modules. According to the method, the technical problems of high plane coupling, resource scheduling rigidness, insufficient survivability and high hardware dependency in the prior art are solved.

The invention discloses an unmanned aerial vehicle multi-mode interference device based on a digital source, and relates to the technical field of electromagnetic security and protection. According to the unmanned aerial vehicle multi-mode interference device based on the digital source, airspace wireless signals are monitored in real time through multi-channel software defined radio SDR equipment, frequency hopping data of a target unmanned aerial vehicle are collected, and historical data traceability analysis is combined; backtracking the frequency hopping decision logic of the unmanned aerial vehicle by using a digital source, extracting a communication mode and predicting possible frequency hopping points in the future; in the interference implementation stage, a predictive interference strategy is adopted, when a target unmanned aerial vehicle hops to a predictive frequency band, directional high-power interference is triggered immediately, a communication link of the target unmanned aerial vehicle is blocked, the frequency hopping logic of the target unmanned aerial vehicle is invalid, the target unmanned aerial vehicle is forced to enter a blind frequency hopping state, and the communication stability is reduced; the communication mode of the target unmanned aerial vehicle is copied in combination with a signal mirroring technology, and a part of credible communication signals are forged to guide the target unmanned aerial vehicle to misjudge the optimal communication frequency, so that the target unmanned aerial vehicle enters a frequency band susceptible to interference by mistake, the communication capability is further reduced, and the interference effect is improved.

The invention relates to the technical field of wireless communication, in particular to a multimode chip core architecture system realized based on a software radio technology, which comprises an anti-interference module used for executing real-time optimization on a multi-system compatible baseband data stream and calling a dynamic compensation mechanism based on dynamic frequency shift characteristics in an environment characteristic data set, adjusting a local frequency source and a channel equalization parameter through multi-stage compensation operation to obtain an anti-interference enhanced data stream; and the packaging module is used for packaging the anti-interference enhanced data stream and the positioning data into a time-hopping pulse-direct sequence code division multiple access fusion frame structure and sending the fusion frame structure through a radio frequency unit. Through an ASIC and SDR hybrid architecture and a four-level hierarchical design, a multi-system communication function is integrated, and the hardware efficiency is improved and the power consumption is reduced.

The invention belongs to the technical field of mobile communication networks. The invention provides a virtual terminal simulation device and a network access test method thereof. According to the embodiment of the invention, the virtual terminal simulation device based on the software radio platform is adopted, the authentication signaling between the MME and the HSS is utilized, and the bidirectional authentication between the virtual terminal simulation device and the LTE core network is broken through, so that the real network access and specific service test of the virtual terminal equipment without the SIM card are realized. Compared with the prior art, great flexibility is provided, protocol stacks and related business process algorithms are allowed to be realized and modified from a software level, customized development and testing are carried out for specific business scenes, and researchers can deeply explore security vulnerabilities in a network and test the effectiveness of various security measures.

The utility model discloses a cluster channel machine based on RF Transceiver software radio, which comprises an FPGA, a DSP, an ARM, a clock management chip, an LNA, a PA, a DSA and a SAW Filter, the FPGA is respectively connected with the DSP, the ARM, a Flash3 and the clock management chip, the DSP is connected with an SDRAM1 and a Flash1, the ARM is connected with an SDRAM2 and a Flash2, the clock management chip is connected with a TCXO, the cluster channel machine comprises an RF Transceiver connected with the FPGA and the clock management chip, the input end and the output end of the RF Transceiver are both connected with the SAW Filter, and the input end and the output end of the RF Transceiver are connected with the LNA, the PA, the DSA and the SAW Filter. And the LNA, the PA, the DSA, the SAW Filter and the RF Transceiver are sequentially connected and arranged to form an RF RX receiving channel and an RF TX transmitting channel. According to the utility model, the circuit of an RF transmitting and receiving channel is simplified, multiple paths of radio frequency signals can be directly adopted, the radio frequency signals from 300MHz to 6GHz are output, and the functions of digital filtering, digital up and down converters, digital combination, modulation and demodulation, automatic power control and the like are integrally realized; different functions can be realized by loading different waveforms, different requirements can be met without changing hardware, the cost, the power consumption and the size are reduced, the debugging process is reduced, and the production is more convenient.

A low-complexity unmanned aerial vehicle signal reconnaissance and interference system comprises a software radio receiver, a software radio transmitter, an unmanned aerial vehicle signal reconnaissance module and an unmanned aerial vehicle signal interference module. The software radio receiver sweeps frequency in a specified frequency range and outputs frequency spectrum slices, and the unmanned aerial vehicle signal reconnaissance module stores reconnaissance results in structural body data after carrying out fixed-frequency signal detection and parameter estimation, frequency hopping signal detection and parameter estimation and broadband signal parameter estimation processing on the frequency spectrum slices step by step. And the software radio transmitter radiates interference signals and interferes the unmanned aerial vehicle signal with the largest threat. According to the method, a general software radio receiver and a transmitter are used as an algorithm deployment platform, unmanned aerial vehicle signal reconnaissance in a complex electromagnetic environment is realized by using a low-complexity signal detection and parameter estimation algorithm, and unmanned aerial vehicle signal interference is guided by rapidly utilizing reconnaissance information through a simple interference strategy; and detection and countering of the unmanned aerial vehicle are realized.

Implementations of a method of detecting a plurality of radio pulses may include, using at least one signal processor: pre-processing a wideband intermediate frequency signal to form a channelized segment from a software defined radio; performing coherent single-pulse correlation using a spectrogram of the channelized segment; and performing multi-pulse combining with the spectrogram, and determining whether a pulse train including a plurality of radio pulses from a desired pulsed radio signal may be present in the spectrogram.

The present invention discloses a radio frequency cancellation circuit and an anti-interference receiver. The radio frequency cancellation circuit includes a radio frequency phase detection circuit, a baseband filtering and processing circuit, and a vector modulation circuit; the baseband filtering and processing circuit includes an AD circuit, a DA circuit, and a microprocessor; the output signal of the radio frequency phase detection circuit is converted into a digital circuit by the AD circuit, and then digitally filtered and phase adjusted by the microprocessor, and then converted into a reference low-frequency baseband signal by the DA circuit. The anti-interference receiver adopts the radio frequency circuit to eliminate in-band interference. In the present invention, due to the use of software radio technology, through the microprocessor and the supporting circuit, the cancellation strategy can be adjusted in real time according to the spectrum form and signal bandwidth of the interference signal, so as to achieve a good adaptive cancellation effect.

The invention discloses a digital receiver signal demodulation method, system and device and a storage medium, and relates to the technical field of communication software radio, and the method comprises the steps: obtaining a complex signal, and judging the quadrant of the complex signal on a coordinate system; rotating the complex signal to a first quadrant of a coordinate system according to absolute values of a real part and an imaginary part of the complex signal; determining the rotation angle and the number of iterations of the complex signal; the complex signal is subjected to multiple times of iterative rotation according to a specific rotation angle until the last iteration result is close to a real axis, and the complex signal and the iterated phase of the complex signal are output; performing error compensation on the real part of the output complex signal to serve as the amplitude of the output complex signal, and restoring the iterated phase according to the quadrant to which the initial complex signal belongs to serve as the phase of the output complex signal; according to the method, a pipeline structure is adopted according to the iteration characteristics, the data throughput is increased, and the data operation efficiency is improved. And partial operation is replaced by adopting a table look-up form, so that the resource overhead is saved.

The invention discloses a radiation source new individual identification method based on signal enhancement double contrast learning, and belongs to the field of software radio. According to the method, a multi-physical domain enhancement operator sequence is adopted, so that the risk that feature distortion is possibly introduced in traditional data enhancement is overcome, and a high-quality feature discrimination basis is provided for subsequent comparative learning by constructing positive and negative sample pairs with strong correlation. A feature decoupling architecture of double comparative learning is adopted, and the category discrimination advantage of supervised comparative learning and the feature decoupling capability of unsupervised comparative learning are organically fused. Dynamic semi-supervised clustering is realized by adopting a dual decision clustering mechanism, firstly, the number of potential categories is determined by utilizing density peak clustering DPC, secondly, a semi-supervised decision module is introduced to realize known category accurate identification and unknown category adaptive discovery of radiation source individuals, and then new radiation source individual identification is realized. The method is suitable for the field of software radio, and high-precision radiation source new individual identification is realized.

The invention relates to a reconfigurable equipment simulation system based on software radio, and the system achieves the high-integration, user-friendly and efficient-management reconfigurable equipment simulation system through the modularization and seamless integration of a radio waveform design function, an equipment simulation user operation interface design, a business logic function design and a project management function. Therefore, even if a user does not have a deep programming capability, the user can quickly construct, test, manage and deploy the equipment simulator with complete functions. The system is rich in waveform component and UI component library, customizable in function and good in flexibility, software radio waveform design and equipment simulation are innovatively and seamlessly integrated, automatic non-inductive or manual upgrading can be achieved, the universality is good, various equipment simulators can be designed, the designed equipment simulators have open function expansion, and the system is suitable for popularization and application. And a complete project management process is provided.

The invention discloses an integrated communication system channel test system and method based on a software radio architecture. The system comprises an integrated communication system hardware platform and upper computer test software, and the integrated communication system hardware platform is formed by connecting a general channel module, a security secrecy module, a general control module, a general exchange module, a general information processing module and a general storage module through a backboard module bus. The upper computer test software is connected with the general control module. The method comprises the steps that upper computer test software generates a test data packet and sends the test data packet to a target hardware module; the target hardware module receives the test data packet and then sends a response data packet to the universal control module; and the general control module sends the response data packet to the upper computer test software so as to judge whether the channel between the system modules is normal or not. According to the method, the problem of channel testing between hardware modules in the integrated communication system is solved, the channel debugging time is shortened, the manpower cost is reduced, and the integration efficiency of the integrated communication system is improved.

The invention discloses a multi-scene signal data-oriented multi-block mixed expert radio frequency fingerprint identification method, and belongs to the field of software radio. According to the implementation method, a plurality of expert modules are adopted, and each expert module is designed to be used for extracting feature representations under different conditions so as to cope with signal changes under various complex scenes. A lightweight and efficient route selection module is adopted to dynamically distribute and input signals to the most matched expert module according to the dimensionalities such as statistical characteristics, frequency domain structures or time sequence characteristics of the input signals, or output results are weighted and fused among a plurality of experts, so that the pertinence and flexibility of feature extraction and recognition are improved. A cooperative mechanism between expert modules is optimized by adopting a joint training strategy, so that an individual recognition model can maintain the independent expression ability of experts, and the convergence speed and stability of the whole model are improved by sharing bottom-layer expression and high-layer decision-making. The method is suitable for the field of software radio, and high-precision radiation source individual identification is realized.

The invention discloses a virtuality and reality combined communication network semi-physical simulation platform and method, relates to the technical field of computer simulation, and can meet accurate simulation requirements under the condition of a large-scale wireless network. The platform comprises a physical node, a virtual node, a radio frequency channel simulator and a link channel simulator. The physical node comprises a first container server and a software radio platform, and the first container server deploys a non-real-time part; deploying a real-time part by the software radio platform; and the container server is connected with the software radio platform through a network port. The virtual node comprises a second container server and a software radio baseband processing board, and the second container server deploys a non-real-time part; the software radio baseband processing board deploys a real-time part, and the container server is connected with the software radio baseband processing board through a network port. The physical nodes are interconnected through the radio frequency channel simulator, the virtual nodes are interconnected through the link channel simulator, and the virtual nodes and the physical nodes are interconnected through the container network.

The invention relates to a radio frequency front-end transmitting link and a state detection method thereof, the transmitting link adopts four-stage series power amplification circuits, and the four-stage series power amplification circuits comprise a first-stage power amplification circuit, a second-stage power amplification circuit, a third-stage power amplification circuit and a fourth-stage power amplification circuit; the first-stage power amplification circuit is composed of a first pi attenuator and a low-noise amplification chip and used for radio frequency small signal gain amplification. The second-stage power amplification circuit is formed by cascading a temperature compensation attenuator, a filter and a gallium arsenide power amplifier tube, and the filter is a broadband filter, a tuned filter or a frequency hopping filter; the third-stage power amplification circuit is formed by cascading a numerical control attenuator and a three-stage gallium nitride power amplifier tube; and the fourth-stage power amplification circuit is formed by cascading a second pi-type attenuator and a last-stage gallium nitride power amplifier tube. The method has the advantages of being high in dynamic range and good in adaptability in a software radio system.

The invention relates to the technical field of wireless communication, in particular to a software defined radio-based multi-band dynamic reconfigurable switching system, which comprises an environment sensing module, a band analysis module, a reconfiguration decision module, a switching execution module and a verification module, wherein the environment sensing module is used for collecting an original time domain signal; the frequency band analysis module is used for generating an available frequency band feature list; the reconstruction decision module is used for calculating a comprehensive score of each frequency band and generating a corresponding reconstruction configuration instruction; the switching execution module is used for configuring an SDR radio frequency front end; and the verification module is used for detecting whether response is confirmed. According to the invention, a dynamic wireless communication system with high-precision spectrum identification and rapid reconstruction capabilities is constructed by realizing real-time sensing, intelligent decision and self-verification switching of a multi-band environment, so that the communication stability and the spectrum utilization efficiency are remarkably improved.

The invention relates to the technical field of wireless communication, and discloses a rapid networking method based on software defined radio fusion of multiple communication devices, which comprises the following four steps: preliminary networking, strategy decision and broadcast integration, direct neighbor device response and integration, and indirect neighbor device and other device integration. Information exchange and data transmission between cross-platform and cross-protocol communication devices are realized. And an integration mechanism of layer-by-layer diffusion is adopted, so that orderliness and high efficiency of the networking process are ensured. According to the method, network parameters do not need to be configured manually, the networking complexity and cost are reduced, and the networking efficiency and flexibility are improved. The method is especially suitable for emergency communication, Internet of Things, military communication and other scenes requiring rapid and flexible networking.

The invention discloses a software radio unified modeling method and system, and belongs to the field of software radio, and the method comprises the steps: determining modeling objects as platform modeling and waveform modeling; wherein during platform modeling, abstract modeling is performed on each calculation unit, and during waveform modeling, waveform component modeling and waveform application modeling are included; in the waveform component modeling, at least one modeled waveform component runs on a calculation unit, and a plurality of waveform components can be deployed on the calculation unit at the same time; the waveform application modeling comprises the following steps: establishing a connection relation between waveform components, and assembling into waveform application; then executing a modeling process of creating a platform model, creating a waveform model and establishing a platform and waveform connection relationship, and performing modeling detection; establishing a basic model set after modeling detection; the basic model set comprises a platform model subset and a waveform model subset. The modeling efficiency and the standardization degree are improved.

The invention discloses a high-reliability three-dimensional integrated direct sampling software radio architecture radio frequency microsystem, which is based on a direct sampling software radio system architecture and a multi-layer glass-based TGV adapter plate wafer-level bonded POP three-dimensional stacked packaging architecture. A high-performance glass antenna, silicon-based single core particle Fan-in and Fan-out packaging, mixed multi-core particle integration of an embedded glass-based TGV adapter plate, mixed bonding integration of a silicon-based digital TSV adapter plate and the glass-based TGV adapter plate are combined, and a glass antenna, a direct sampling core particle, a silicon-based computing power circuit, a silicon-based storage circuit and a silicon-based interface circuit are integrated. And the three-dimensional heterogeneous integration of the microsystem is realized. According to the micro-system, a glass substrate is used as a main body packaging material, a radio frequency circuit and a digital-analog hybrid circuit are fused, three-dimensional heterogeneous integration from a glass antenna to a baseband storage and calculation integrated processing circuit is realized, and a complete integrated airtight packaging micro-system is formed and can cover a DC-20GHz frequency band.

The invention discloses an ASM signal time delay measuring and calculating system based on a software radio peripheral. The system comprises a transmitting end and a receiving end, the transmitting end comprises a signal generator, a first time-frequency synchronization device and a VHF transmitting antenna; the first time-frequency synchronization equipment externally triggers the signal generator to send a pre-generated ASM signal through the VHF transmitting antenna; the receiving end comprises software radio equipment, second time-frequency synchronization equipment, a computing host and a VHF receiving antenna; and the second time-frequency synchronization equipment externally triggers the software radio equipment to receive ASM signals through the VHF receiving antenna, the software radio equipment sends a processed receiving signal sequence to the computing host, and accurate time delay is obtained through a sliding correlation algorithm. According to the invention, the ASM signal is received based on the USRP, and the signal time delay is calculated by using the good autocorrelation of the ASM signal, so that the signal transmission time delay measurement precision is improved, and the ship navigation safety is ensured.

The invention relates to the technical field of software defined radio communication, and discloses a dual-mode adaptive communication method and system based on SDR. The method comprises the following steps: receiving an original wireless signal, preliminarily judging a protocol family, and activating a corresponding signal analysis engine and a channel evaluation engine; the signal analysis engine restores a complete communication message unit, and the channel evaluation engine quantitatively represents a channel state. The information of the two information is input into a dynamic decision-making network, and the network learns an implicit association rule between the semantic integrity of the message and the transmission reliability of the channel and outputs a collaborative decision-making instruction containing a mode priority weight vector. The instruction is finally compiled into a hardware configuration parameter sequence, and the radio frequency front end and the baseband unit are driven to reconfigure, so that mode self-adaptive switching is realized. According to the invention, cross-layer intelligent decision and flexible multi-mode scheduling are realized, and the reliability and efficiency of communication in a complex wireless environment are improved.

This invention discloses a comprehensive identification test device and method based on software-defined radio technology, belonging to the field of avionics equipment testing. The device includes: a core processing and control unit, employing a multi-channel high-speed AD / DA and MPSoC FPGA architecture, supporting concurrent operation of various conventional aircraft identification functions through multiple internally integrated models; a radio frequency transceiver module, connected to the core processing and control unit, used for digital frequency conversion and analog-to-digital conversion of signals; a high-power radio frequency front-end component, internally equipped with multi-stage attenuation circuits and isolation devices, used for physical isolation and filtering attenuation of transmitted and received signals, ensuring its power covers the dynamic range of airborne received signals; and a remote control interface for receiving remote control commands to achieve automated test linkage. This invention allows direct connection to test the receiving performance of airborne equipment without the need for external high-power accessories, achieving a high degree of integration and automation of the test equipment, significantly improving detection and troubleshooting efficiency.

The invention discloses a software-defined aviation data link ADS-B message receiving and sending method based on a software radio platform, wherein the platform includes a GNSS positioning module, a pressure altitude module, an aircraft flight control data module, a sending data processing module Raspberry Pi, a software radio sending module HackRF ONE, a sending antenna, a receiving antenna, a software radio receiving module HackRF ONE and a receiving data processing module Raspberry Pi; the method comprises: based on the platform, according to the electromagnetic spectrum situation of the monitored airspace, a software-defined aviation data link is selected to monitor the flight status of the aircraft, and data complementation and distributed base station data completion are performed at the same time, so as to realize unified continuous ADS-B message receiving and sending and monitoring of all aircraft in the airspace. The flight safety of unmanned aerial vehicles in low-altitude airspace near the ground is guaranteed, and the unmanned aerial vehicle air traffic control agency is convenient for real-time monitoring of the flight process of the unmanned aerial vehicle.

The invention relates to a software radio waveform library with indefinite characteristic attributes, a method and equipment, and aims to design an attribute characteristic library, a waveform management library and a binding relationship between the attribute characteristic library and the waveform management library by optimizing a data type representation mode and a multi-level data structure design under the condition that the characteristic attributes are variable and uncertain. Software radio waveform library design of indefinite feature attributes is completed, user-defined feature attribute categories, feature attributes and waveform feature attribute templates are supported, and great flexibility is provided for waveform feature representation; the binding quantity and types of the characteristic attributes based on the design waveform do not influence the system performance; data types with more feature attributes, such as dimension data, are supported; and the design of the binding relationship between the feature attributes and the waveform library supports rapid retrieval for the feature attributes.

The invention discloses a target distance and speed measurement system and method based on a direct detection laser radar compatible with software radio, and belongs to the technical field of target distance and speed measurement. According to the invention, the problems of low utilization rate of echo light power, complex structure, crosstalk of microwave and optical frequency signals, and low precision of distance measurement and speed measurement in the prior art are solved. According to the improved direct detection laser radar structure compatible with the software radio provided by the invention, a radio frequency signal can be demodulated from echo signal light of the laser radar only by a single square-rate photoelectric detector, so that the structure is simpler; and the frequencies for transmitting and receiving the microwave radio-frequency signals are different, so that the microwave crosstalk of the transmitting end and the receiving end is avoided. Due to the fact that the receiving and transmitting separated optical antenna is adopted, crosstalk of optical frequency signals can be eliminated. Moreover, the method effectively improves the measurement precision of the target distance and speed. The method can be applied to target distance and speed measurement.

The invention discloses a resource management method and system for software radio communication equipment with visible heterogeneous resources, and belongs to the field of software radio, and the method comprises the steps: dividing an internal processor of the software radio communication equipment into two types of middleware supporting CORBA and middleware not supporting the CORBA; deploying a manager for a processor supporting CORBA middleware, and carrying out platform modeling according to a software radio modeling method; for a processor which does not support the CORBA middleware, splitting a test function to form test behavior elements, and providing an interface conversion and connector; then the connector is connected with the manager, the manager generates platform topology data according to registration information of the connector, and a unified connection mode of CORBA and MHAL / MOCB is constructed in a fusion mode. According to the invention, the unified management capability of the internal resource management mechanism of the software radio equipment to the processor can be constructed, and the universality level of the platform is improved.

An apparatus configured to detect small particles of a substance suspended in a matrix using ultrasound, may include: a container device configured to receive a sample in an inner volume, including: a first ultrasonic transducer mechanically coupled to or disposed on a first exterior portion of the container device and oriented toward the inner volume, the first ultrasonic transducer may include: a first ultrasonic transmitter; and a first ultrasonic receiver; optionally a first receiver amplifier coupled to the first receiver; optionally the first transmitter amplifier coupled to the first transmitter amplifier; and either: a) a software defined radio (SDR), or b) a signal generator and an oscilloscope, where SDR or signal generator and oscilloscope are electronically coupled to the first ultrasonic transmitter and electronically coupled to the first ultrasonic receiver amplifier; and the electronic controller coupled to the SDR or the signal generator and the oscilloscope.

The present invention discloses a VHF data link simulation device based on software radio, which includes a controller; a vector signal transceiver connected to the controller; a VHF data link component connected to the vector signal transceiver; wherein the vector signal transceiver is used to receive the pulse signal sent by the VHF data link component and decode it to obtain a message according to the control of the controller, and to perform VDL encoding and up-conversion according to the configuration operation of the user to output the corresponding VHF data link signal; the pulse signal or the VHF data link signal is a VHF data link mode A signal or a VHF data link mode 2 signal. It can be seen that the present invention can realize the simulation of pulse signal sending and receiving of two VDL modes, and overcome the problems of low efficiency and incomplete functions of existing similar VHF data link simulation devices.

The invention relates to an unmanned aerial vehicle countering system and a software radio module. The software radio module comprises a function module and an interface assembly. The functional module is electrically connected with the interface assembly, and the interface assembly is also used for being detachably and electrically connected with a control end and / or interface assemblies of other software radio modules. The interface assembly is used for receiving control information of the control end. The function module is used for generating a radio frequency signal of a corresponding frequency band based on the control information. According to the technical scheme, the flexibility of system configuration is improved.

The present application at least describes a method for waveform synthesis. The method may include a step of transmitting a stimulus signal to a software defined radio (SDR) operating in a first state. The method may also include a step of receiving, via the SDR, an output signal based upon the transmitted stimulus signal. The method may also include a step of. determining, based upon the received output signal, a delay state of the SDR from a plurality of predetermined delay states of the SDR. The delay state may be associated with a parameter of the SDR. The parameter may include any one or more of a receive frequency, transmit frequency or bandwidth. The method may further include a step of generating a calibrated signal based upon the determined delay state. The method may even further include a step of sending the calibrated signal to the SDR to adjust a time.