11 results about "Software define radio" patented technology

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.

This invention discloses an efficient QR matrix decomposition method based on FPGA for implementing systolic matrices, belonging to the field of software-defined radio signal transmission technology for airborne networks. It is based on the design of a multi-channel digital front-end implemented on an FPGA chip. The method includes: designing a general handshake coordination mechanism, designing a timing flow for systolic matrix multiplication, performing fast QR matrix decomposition single-loop operations by calculating the Householder mirror transformation matrix, designing a top-level loop pipeline for QR matrix decomposition, and finally verifying the hardware scheme of the fast QR decomposition algorithm. This invention converts resource consumption into timing consumption by designing the overall pipeline logic and loop operations, enabling fast processing and accurate decomposition of digital information in a multi-channel digital front-end on an FPGA, effectively saving on-chip resources. In addition, this invention has excellent scalability, supporting 64 to 128-bit high-precision fixed-point number formats, and the data matrix order can reach up to 128.

This invention relates to the field of wireless communication network technology and provides a heterogeneous stream processing cluster interconnection device in a software radio system. By designing a heterogeneous computing power cluster interconnection architecture in which the radio frequency front-end layer, heterogeneous computing power pool layer, core interconnection layer, and cluster management layer work together, and with the core structure design of heterogeneous cluster internet gateway + high-speed cluster non-blocking switching + global cluster high-precision synchronization + layered cluster deployment, it breaks through the technical bottlenecks of existing heterogeneous computing power cluster integration from the hardware level, and achieves significant improvements in cluster collaboration performance, synchronization accuracy, transmission efficiency, compatibility, reliability, and engineering feasibility, effectively improving the cluster interconnection performance of the heterogeneous stream processing cluster.

This invention discloses a cognitive radio frequency (RF) signal digital fusion processing method, belonging to the fields of RF communication, software-defined radio, and radar signal processing technology. Based on a star-shaped decoupled architecture of "RF front-end - fusion processing center - digital processing back-end," this method achieves unified access and resource sharing of multiple heterogeneous RF front-ends through multi-source fusion access scheduling; adaptive analog conditioning regulates levels and bandwidth; end-to-end synchronous synchronization establishes a unified timing reference for the entire process; synchronous digitization and digital domain fusion processing complete signal standardization conversion; and intelligent routing and multi-protocol adaptation enable fusion distribution of multiple types of digital back-ends. This method fundamentally solves the pain points of traditional systems, such as high coupling, weak multi-source fusion capability, poor compatibility, low resource utilization, and insufficient synchronization, and can be widely applied to general signal processing scenarios such as communication, spectrum monitoring, radar detection, and electronic reconnaissance.

This invention discloses a sub-sampling high-precision wireless ranging and synchronization method based on ZC sequences, belonging to the field of wireless communication and signal processing technology. It addresses the problems of traditional software-defined radio devices being limited by the physical sampling grid of the ADC, and the systematic bias in parabolic interpolation caused by the asymmetry of correlation peaks in traditional pseudo-random sequences. This method generates a ZC (Zadoff-Chu) preamble sequence with a 0dB peak-to-average power ratio at the transmitter and transmits it at full power; at the receiver, the discrete peak index and amplitude are obtained through matched filtering; relying on the constant amplitude and zero autocorrelation characteristics of the ZC sequence, distortion-free sample points in the symmetrical neighborhood of the main peak are accurately extracted; unbiased quadratic least squares (QLS) is used for continuous domain extremum fitting to analyze the sub-sampling time offset, and finally outputs a high-resolution absolute time of flight that breaks through the physical grid. This invention greatly eliminates interpolation fitting errors, significantly improves the ranging signal-to-noise ratio, and achieves sub-nanosecond-level high-precision synchronization and centimeter-level high-precision ranging on computationally limited platforms.

Systems and methods provide architectures for various applications, for example, for software defined radios and other high frequency (HF) application. Embodiments can provide novel multi path ΣΔ architectures that form the basis for novel N path Sigma Delta (NΣΔ) modulators, NΣΔ digital to analog converters (NΣΔ DAC) and NΣΔ analog to digital converters (NΣΔ ADC).

The utility model discloses a kind of integrated multi-interface software radio machine box structure, including box, terminal board and respectively being equipped with top cover and side cover in the top and one side of the box, further include: mounting mechanism: the mounting mechanism is used to install and fix the side cover;Two limit holes, two movable holes and two digital interfaces of equidistance distribution are respectively equipped on the one side outer wall of the terminal board, wiring block of equidistance distribution is equipped on the one side outer wall of the terminal board, five wiring holes and two mounting holes are respectively equipped on the one side outer wall of the wiring block, second limit bolt is equipped on the inner wall of the mounting hole and the limit hole, two limit rods are equipped on the one side outer wall of the wiring block, the limit rod is used with the movable hole cooperation.The integrated multi-interface software radio machine box structure disclosed in the utility model has wiring mutual non-interference, wiring is simple and convenient, internal wiring and component condition can be observed, and wiring effect is better.

The application discloses a kind of based on single GNSS satellite scene direction method, using software radio and multiple antennas to build the satellite signal receiver of multiple channels, utilize the carrier phase difference of same satellite between multiple channels to build satellite signal direction vector, the direction of satellite signal is calculated by direction vector.In this process, first, the processing delay of software radio and the propagation delay of antenna are calibrated, the relative position between multiple antennas is measured, then multiple channels satellite signal receiver is built using software radio and multiple antennas, multiple channels simultaneously process the signal of same satellite, then in the tracking process, the direction vector of satellite signal is estimated using the carrier phase difference value of multiple channels, finally, the direction of satellite signal is estimated by direction vector.The application realizes the rapid satellite signal direction estimation, calculates the dual-antenna heading information by combining satellite message information, completes the orientation function under the scene of single visible satellite.

The application discloses a kind of based on SDR's custom Wi-Fi data packet transceiver device, the device includes custom Wi-Fi data packet module, Wi-Fi data packet and baseband signal conversion module, computer and software defined radio hardware interface module, software defined radio hardware module, antenna module of wireless signal transceiver.The sending process of the method of the device is that custom Wi-Fi data packet module is responsible for custom sending Wi-Fi data packet format;Wi-Fi data packet and baseband signal conversion module will custom Wi-Fi data packet frame be converted into Wi-Fi baseband signal data;Computer and software defined radio hardware interface module is responsible for transmitting Wi-Fi baseband signal data to software defined radio hardware module;Software defined radio hardware module converts Wi-Fi baseband signal data into radio frequency signal;Wireless signal transceiver antenna module sends radio frequency signal to air medium communication.The receiving process of the method of the device is contrary to sending process.

The present application relates to the technical field of electromagnetic compatibility monitoring and transient electromagnetic interference detection, in particular to a static discharge transient signal detection method and device based on software radio, comprising: collecting and digitizing and buffering static discharge transient signals, pre-processing the collected continuous signals, waveform window intercepting and standardizing the burst signals meeting the conditions, sending the standardized data into a double-branch recognition model for recognition processing, splicing the feature vectors of the two branches, and completing signal recognition after processing by a fusion discrimination layer, compared with the prior art, the method can effectively improve the distinguishing ability of ESD signals and interference signals, has high recognition accuracy and good engineering application value.

A wireless relay system includes a first software radio device that performs radio communication with a radio control device and a second software radio device that performs radio communication with a radio terminal. The first software radio device captures, as iq data, a radio signal received from the radio control device, transfers the captured iq data to the second software radio device in real time, converts the iq data transferred from the second software radio device into a radio signal, and transmits the radio signal to the radio control device. The second software radio device captures, as iq data, a radio signal received from the radio terminal, transfers the captured iq data to the first software radio device in real time, converts the iq data transferred from the first software radio device into a radio signal, and transmits the radio signal to the radio terminal.