104 results about "Channelized" patented technology

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 invention belongs to the technical field of electronic search, and relates to a radio reconnaissance method and system based on multichannel parallel processing and intelligent clustering, and the method comprises the steps: carrying out the multi-phase filtering digital channelization processing of a broadband radio signal, so as to obtain adjacent channel sequences with overlapped frequency bands; performing square law detection and constant false alarm detection on each channel sequence to generate an initial pulse description word; establishing a candidate corresponding relationship in adjacent channels based on arrival time similarity and noise consistency, and determining a cross-channel merging relationship according to frequency range continuity and frequency-time relationship slope consistency to generate a complete pulse description word; performing hierarchical clustering sorting based on the arrival angle and the pulse width; and performing multi-stage differential analysis on a clustering result to extract a repetition frequency sequence and determine a repetition frequency type. According to the technical scheme, the stability and consistency of cross-channel pulse merging and sorting results can be kept under the broadband high-density condition, and the radio search processing precision under the complex electromagnetic environment is improved.

The invention discloses a multi-channel integrated radio frequency system based on double-threshold interference detection and dynamic spectrum aggregation. A radio frequency front-end unit is used for realizing broadband spectrum access and performing analog-to-digital conversion; the digital channel processing unit is used for realizing channelized segmentation through up-conversion and down-conversion, carrying out band elimination filtering to shield unavailable channels and outputting filtering parameters to support dynamic channel recombination; the digital signal parallel processing unit performs parallel access by using the divided channels; the spectrum sensing unit is used for carrying out double-threshold channel interference detection and real-time spectrum analysis according to the parallel access signals; and the frequency spectrum decision-making unit is used for judging the channel state and fusion detection judgment according to the interference detection result, judging the availability of a specific channel in the data link network and carrying out cooperative dynamic frequency spectrum aggregation. According to the method, a consistent spectrum access decision is realized by adopting a spectrum monitoring, sensing convergence and fusion decision mechanism, and consistent understanding of an available frequency set and high-reliability network domain dynamic spectrum aggregation are guaranteed.

The invention relates to the technical field of channelized receiver management, in particular to a dynamic range channelized receiver method and system based on a block floating point and AGC (Automatic Gain Control), in the system, an automatic gain control module is used for detecting the power of an obtained intermediate frequency analog signal, generating an AGC voltage corresponding to the intermediate frequency analog signal and feeding back the AGC voltage to an analog front end; and dynamically updating the gain of the variable gain amplifier in the radio frequency signal preprocessing process. According to the invention, each channel has independent block floating point gain control, and the channels do not interfere with each other, so that parallel signal-to-noise ratio processing is realized; meanwhile, a complete gain control history is constructed by jointly recording the AGC gain and block floating point processing, data support is provided for recovering the original absolute power value of the signal in each channel, and the contradiction between gain control and information reservation is solved to a certain extent.

The application belongs to the technical field of optical communication and relates to a frequency-shift-free microwave photonic channelized receiving device, which comprises a carrier light frequency comb generating unit, a local light frequency comb generating unit, an electro-optical modulation unit, an optical phase shift unit, a channel selection and spectrum processing unit and a plurality of photoelectric conversion units. The received broadband radio frequency signal is modulated on each comb tooth of the carrier light frequency comb through the electro-optical modulation unit, and the frequency alignment between the optical local oscillator and the required receiving sub-channel can be realized based on the "vernier" effect caused by the different free spectral ranges of the carrier light frequency comb and the local light frequency comb and the inherent frequency alignment of the same pump laser. The mirror image sub-channel suppression is realized based on the opposite optical phase shifts on both sides of the pump light. The application has a simple structure, omits the frequency shift and special modulation structure required for frequency alignment, effectively suppresses the inter-channel crosstalk problem in the channelized receiving process, and can flexibly increase the channelization quantity according to actual needs.

The application relates to a chip verification method. The method comprises the following steps: acquiring a to-be-tested chip program and signal constraint parameters corresponding to each to-be-tested function module in the to-be-tested chip program; based on a preset signal generation function, extracting the signal constraint parameters corresponding to each to-be-tested function module, generating a value constraint condition, and generating each simulation signal by traversing all the value constraint conditions; in a verification environment, performing channelization processing on each simulation signal by the to-be-tested function module to obtain each processing result; acquiring reference results corresponding to the to-be-tested function module, and determining a verification result of the to-be-tested function module according to each reference result and each processing result. The method can improve the accuracy of the chip verification method.

The application provides a photon-assisted ultra-wideband millimeter wave multi-channel receiver, and the ultra-wideband millimeter wave multi-channel signal is channelized and divided by adopting the radio frequency local oscillator microwave photon frequency conversion, high-frequency stable multi-channel channelization local oscillator generation and multi-channel parallel coherent detection technology; under the constraint of a low-cost analog-digital converter, the function of high-sensitivity parallel narrowband reception of the ultra-wideband millimeter wave signal is realized through parallel channel analog-digital conversion and reception processing, and large capacity and long-distance transmission of millimeter wave wireless communication are supported. The application solves the problems of ultra-wideband signal reception, analog-digital conversion and processing in millimeter wave wireless communication, supports large capacity and long-distance transmission of millimeter wave wireless communication, and can be applied to an ultra-wideband millimeter wave wireless communication system; the principle is simple, the scheme is simple and efficient, and the application value is high.

The invention discloses a service-adaptive satellite-borne non-uniform multicarrier demodulation device, and belongs to the field of digital signal processing. The method comprises the following steps of: firstly, performing orthogonal down-conversion and resampling filtering processing on a digital intermediate frequency signal sampled by an ADC (Analog to Digital Converter), processing the digital intermediate frequency signal by a non-uniform channelization splitter, and then serially outputting the digital intermediate frequency signal to a spread spectrum ratio self-adaptive variable burst capturer according to fixed quadruple sampling to capture a leading head and identify the spread spectrum ratio; the method comprises the following steps: completing symbol synchronization and de-spreading processing on an input signal according to a spread spectrum ratio, then completing carrier coarse synchronization and pattern word identification, completing modulation mode identification and carrier synchronization according to a pattern word, performing channel decoding through a multi-mode decoder to recover to an information bit stream, and outputting the information bit stream. And the information bit stream is sent to a service frame recombination processor for search identification and recombination splicing, and output is carried out after whole-frame CRC check is carried out. The method has the advantages of flexibility in use, low resource occupation and capability of realizing adaptive demodulation of variable-rate, multi-modulation-mode and multi-coding-mode service transmission signals without parameter configuration.

The present disclosure provides a multi-mode satellite mobile communication uplink signal real-time detection and identification method and system. Applied to the field of satellite mobile communication technology, the method comprises: performing wideband sampling on the obtained received signal to obtain sampling data, performing signal carrier detection on the sampling data, judging whether the sampling data contains a target signal, and if so, proceeding to the next step; performing channelization processing on the sampling data to obtain narrowband signals in different satellite system corresponding narrowband channels; performing TDMA signal detection on the narrowband signals to obtain signal specifications, wherein the TDMA signal detection comprises energy detection, correlation detection, and signal identification. The present disclosure has the advantages of: significantly improving the accurate identification capability of various satellite mobile communication terminal uplink signals, with a detection and identification accuracy of 99%; and the hardware cost of the present disclosure increases little, and has a low-cost application prospect.

The invention discloses a simultaneous diversity signal real-time detection method, and belongs to the technical field of radar signal reconnaissance. Comprising the following steps: S1, full-channel signal detection and parameter measurement; s2, performing hierarchical cache management on pulse description words; s3, performing matching detection and fusion processing on the simultaneous diversity signals; s4, data re-caching and detection circulation are carried out; according to the simultaneous diversity signal real-time detection and measurement method provided by the invention, aiming at the technical pain point that a traditional digital channelized radar reconnaissance receiver is difficult to detect the simultaneous diversity signal quickly and effectively in real time, through the core design of hierarchical cache management, fixed reference matching fusion and closed-loop circulation detection, the real-time detection of the simultaneous diversity signal is realized; according to the method, accurate and real-time detection and parameter extraction of simultaneous diversity signals are achieved, meanwhile, excellent engineering realizability and scene adaptability are achieved, breakthrough is achieved from multiple aspects of signal detection performance, processing real-time performance, hardware landing performance, engineering practicability and the like, and the signal processing capacity of a radar reconnaissance system in a complex electromagnetic environment is greatly improved.

A signal acquisition device includes a signal channelizer module and a signal processing module. The signal channelizer module is configured to channelize an incoming signal from a moving platform into a first plurality of channels across a first range of frequencies to produce a first channelized signal, to channelize the first channelized signal into a second plurality of channels across a second range of frequencies to produce a second channelized signal, and to store the second channelized signal into a memory. The signal processing module is configured to retrieve the second channelized signal from the memory and search the second channelized signal for a signal of interest. The search may exclude channels tagged to be excised during the storing operation.

Methods, systems, and devices may assist in channelization and LBT for NR unlicensed band. This may apply to NR-U from 52.6 GHz to 71 GHz and above. In an example, a method may include configuring listen before talk (LBT) bandwidth (BW) and channel occupation time (COT) sharing schemes when co-exist other radio access technology's (RAT'S) channel BW for NR-U from 52.6 to 71 GHz and above; and when LBT or a resource block (RB) set BW is set to equal to each component carrier (CC) BW Nor transmission BW, performing LBT for each CC, primary cell (PCell), primary secondary cell (PSCell), or a scheduling secondary cell (SCell) can co-schedule LBT results for other CC.

Techniques pertaining to designs of channelization of the 60 GHz band for next-generation wireless local area networks (WLANs) are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus by communicating with a channelization design of the 60 GHz band having a channel center frequency being equal to (a channel starting frequency+ΔF)+ΔF*channelIndex, with ΔF denoting a half of a channel spacing and with channelIndex denoting a channel index value.

The invention provides a dual-multistatic radar system based on an all-optical architecture, which comprises a transmitting station and a receiving station, adopts the all-optical architecture, fully adopts microwave photon technical achievements, and comprises an optical frequency source, optical up / down conversion filtering, an optical phase shift network, optical beam forming, optical channelization and an optical ADC (Analog to Digital Converter). The characteristics of wide working band, low phase noise dispersion, low delay loss and the like of microwave photons are fully utilized; the system adopts a dual multi-base mechanism, supports receiving and transmitting separation and multi-view target observation, and has the system advantages of extremely strong anti-stealth, low interception, anti-interference and the like; the system adopts a wireless synchronization technology based on 1PPS signals to solve the problems of synchronization and signal coherence of the double-base radar and the multi-base radar, the practical scene of the system is effectively widened, and the layout difficulty of the system is reduced.

Methods and apparatus are provided for coordinating single-site sensing, for example, associated with IEEE 802.11 EDMG sites simultaneously transmitting single-site sensing PPDUs. A DMG sensing request frame from the sensing initiator coordinates the sensing responder; each frame includes a STA ID field, a number of STAs in exchange field, and a BW field, which guide the timing and channelization of the sensing PPDU. In some embodiments, IEEE 802.11 service cycles are allocated for transmission operations (e.g., simultaneous single-site sensing PPDUs on different channels) and related operations (e.g., sensing request frames, sensing response frames, polling, reporting, acknowledgment, etc.). In some embodiments, single-site sensing is performed using IEEE 802.11 contention-based access cycles. The responder determines whether they are the receiver of the last sensing request frame and operates accordingly to transmit their single-site sensing PPDU. This can be determined based on the STA ID field.

The application discloses a GPU channelization receiving method based on adaptive bandwidth threshold segmentation, which comprises the following steps: S1, transmitting wideband input signal data from a host memory buffer to a corresponding device memory buffer, wherein the host is a CPU end, and the device is a GPU end; S2, calculating an optimal bandwidth threshold according to all input signal bandwidths, thereby calculating a polyphase filter extraction multiple, wherein D is the extraction multiple; S3, performing polyphase filter calculation on input data according to the extraction multiple, thereby dividing the input data into D channel data; S4, segmenting the input signal according to the bandwidth threshold: if the signal bandwidth is less than the bandwidth threshold, performing down-conversion calculation on the channel data, otherwise, performing down-conversion calculation on the original input data; S5, performing down-sampling calculation according to the down-converted data, thereby changing the output data sampling rate to a specified size; S6, performing low-pass filter calculation according to the down-sampled data, thereby obtaining final output data; and S7, copying data from the device memory buffer to the corresponding host memory buffer. The technical scheme provided by the application can channelize signals of any size and maximize the use of polyphase filters, so that the channelization performance is optimal. The application is realized based on a CUDA computing platform, and the running speed is obviously improved compared with a CPU platform. The application adopts a software processing flow, is more controllable, has better portability, and meets the requirements of channelization acceleration processing with large bandwidth and high throughput.

The application belongs to the technical field of wireless communication, and discloses a sub-channel preprocessing method, a preprocessing system and a channelized receiving system. The sub-channel preprocessing system comprises a photoelectric detection array, a detector, a processor and a matrix switch. The photoelectric detection array is used for beat frequency processing of optical signals of each sub-channel to obtain a set of radio frequency signals, and is also used for dividing each radio frequency signal in the set of radio frequency signals into two paths. The detector is used for obtaining one path signal of each radio frequency signal and performing power detection. The processor takes a sub-channel satisfying a preset power condition as an output channel according to a power detection result of the detector. The matrix switch is controlled by the processor to open the output channel, and outputs another path signal corresponding to the output channel. In summary, power optimization is used to realize selective output of sub-channels, thereby effectively releasing the processing capacity of empty channels and eliminating the redundancy of a digital processing structure.

The invention provides a multi-standard satellite mobile communication uplink signal real-time detection and identification method and system. The method is applied to the technical field of satellite mobile communication, and comprises the following steps: carrying out broadband sampling on an obtained receiving signal to obtain sampling data, carrying out signal carrier detection on the sampling data, judging whether the sampling data contains a target signal or not, and if so, entering the next step; carrying out channelization processing on the sampling data to obtain narrowband signals in narrowband channels corresponding to different satellite systems; and performing TDMA signal detection on the narrowband signal to obtain a signal specification, wherein the TDMA signal detection comprises energy detection, correlation detection and signal identification. The method has the advantages that the capability of accurately recognizing uplink signals of various satellite mobile communication terminals is remarkably improved, and the detection and recognition accuracy reaches 99%; the hardware cost is not increased much, and the method has a low-cost application prospect.

The invention discloses a multi-channel integrated radio frequency system and a dynamic digital channelization method. The system comprises a plurality of groups of radio frequency front ends and antenna units which are used for sampling signals of different working frequency bands; the digital channel processing unit is used for performing down-sampling and frequency deviation on the broadband signal to form a plurality of narrowband channels; the digital signal parallel processing unit is used for carrying out parallel processing on the digital signals of the plurality of narrowband channels; the spectrum sensing unit is used for performing real-time spectrum detection and channel interference detection and judging a spectrum occupation condition and a spectrum hole; the frequency spectrum decision-making unit is used for carrying out fusion detection judgment, judging the availability of a specific narrowband channel in the whole data link network communication system, and aggregating available channels to form a continuous or discontinuous available frequency spectrum; and the spectrum aggregation and channelization reconstruction unit is used for dividing a plurality of sub-bands, analyzing and filtering by adopting a comprehensive filter bank or a cosine modulation filter bank, and carrying out channel reconstruction. And the purpose of simultaneously resisting partial frequency band blocking interference and narrowband comb spectrum interference can be achieved.

The invention relates to the technical field of radio communication and digital signal processing, in particular to a short-wave broadband radio signal receiving and channelization processing system, which comprises a broadband digital receiving front end, a short-wave digital receiving rear end, a short-wave digital receiving front end and a short-wave digital receiving rear end, the spectrum analysis and signal detection module is used for performing spectrum analysis on the high-speed digital signals and identifying and positioning all signal sources contained in the high-speed digital signals; the dynamic channelization resource management module is used for calculating and distributing corresponding channelization processing resources in real time; the reconfigurable parallel channelization processing engine is used for performing parallel dynamic digital down-conversion and filtering extraction on the high-speed digital signals so as to extract a plurality of independent narrowband signal data streams; a plurality of independent signals in a broadband spectrum can be adaptively detected and simultaneously received; according to the invention, the problem of frequency offset caused by Doppler effect or medium change is effectively solved, and the complexity of rear-end signal processing is reduced.

In accordance with a method for performing frequency subchannelization, a digital signal is received at an original sampling rate. A plurality of multirate frequency channels is produced by dividing the digital signal into an integer number of multirate frequency channels such that a sampling rate of each of the multirate frequency channels is proportional to a center frequency of the frequency channel. Signal processing is performed on each of the multirate frequency channels. The original sampling rate is reconstructed using the multirate frequency channels.

An integrated circuit for a modular digital signal processor comprises a plurality of receivers, a plurality of channelisers, a combined switching and beamforming network, a plurality of combiners, and a plurality of digital-to-analogue converters (DACs). The combined switching and beamforming network is operable to perform switching and beamforming on first channelised signals received from the channelisers, and / or on one or more second signals, to obtain a plurality of first beamformed signals. The second signals can comprise second channelised signals and / or second beamformed signals received from one or more other components of the modular digital signal processor. The first and / or second beamformed signals are combined into respective digital output signals by the combiners, and converted into analogue output signal by the DACs, or transmitted over a wider beamforming network comprised of a plurality of such integrated circuits. A modular digital signal processor comprising a plurality of the integrated circuits is also disclosed, together with a signal processing apparatus comprising the modular digital signal processor and an analogue beamformer.

The invention relates to the field of wireless communication, and provides an ultra-wideband receiving channelization processing method, device, equipment, medium and product, the method comprises the following steps: adopting a plurality of deFDM processing branches to process receiving signals of each frequency band, and the processing of the deFDM processing branches is as follows: a wideband deFDM module carries out multi-phase frequency conversion on the receiving signals according to the rough division of frequency band channels, a multi-phase frequency conversion signal is obtained; a multi-phase filtering module performs multi-phase filtering downsampling on the multi-phase frequency conversion signal to obtain a first-stage solution FDM signal; a fine deFDM module performs fine frequency conversion on the first-stage deFDM signal through frequency band channel fine division to obtain a fine frequency conversion signal; and the low-pass filtering module performs low-pass filtering on the fine frequency conversion signal by adopting a parameter symmetry design and a resource time division multiplexing method. According to the invention, ultra-wideband signal frequency decomposition multiplexing with excellent filtering performance and low resource complexity can be realized.

The invention provides a GSM-R spurious interference identification method and device. The method comprises the following steps: acquiring radio signal data, positioning information and machine account information of a GSM-R frequency band; performing spectrum analysis on the radio signal data to obtain bottom noise data; determining a signal characteristic parameter of the radio signal data based on the floor noise data; channelizing the radio signal data to obtain radio signal data of each frequency point; screening the radio signal data of each frequency point to obtain effective channel radio data; determining GSM-R signal data based on the effective channel radio data; determining GSM-R spurious interference information through signal power symmetry analysis, signal period correlation analysis and signal power correlation analysis; stray interference identification is carried out in combination with radio signal data, the scientificity and accuracy of GSM-R stray interference identification are improved, the misjudgment risk is reduced, and the GSM-R stray interference identification method is suitable for large-scale and high-frequency dynamic detection scenes.

The application discloses a DDC phase synchronization method and system based on FPGA system multi-channel sampling, and relates to the technical field of signal processing, and comprises the following steps: a plurality of analog-to-digital converters collect original multi-channel AD data by using a common clock; phase errors between channel data are calculated by using pre-cached partial AD data; if the phase errors are within a transmission error range, a plurality of digital mixers with uniform start signals are used to respectively perform digital down-conversion on the AD data after phase error calibration, so that the phases of output signals of the digital mixers are all from 0 degrees, and the phases of multi-channel AD data after mixing are consistent. When the application deals with multi-channel AD sampling, phase calibration is performed on original data, digital down-conversion is used to synchronously start mixers, and the mixing output phases are consistent. Compared with a traditional channelization mode, the same effect of output data phase synchronization is achieved, and the digital down-conversion configuration is more flexible.

This invention belongs to the field of electronic search technology and relates to a radio reconnaissance method and system based on multi-channel parallel processing and intelligent clustering. The method includes: performing polyphase filtering and digital channelization processing on broadband radio signals to obtain adjacent and overlapping channel sequences; performing square-law detection and constant false alarm rate detection on each channel sequence to generate initial pulse descriptors; establishing candidate correspondences within adjacent channels based on similarity of arrival time and noise consistency, and determining cross-channel merging relationships based on frequency range continuity and frequency-time relationship slope consistency to generate complete pulse descriptors; performing hierarchical clustering and sorting based on angle of arrival and pulse width; and performing multi-level differential analysis on the clustering results to extract repetition frequency sequences and determine repetition frequency types. The technical solution of this application can maintain the stability and consistency of cross-channel pulse merging and sorting results under broadband and high-density conditions, and improve the accuracy of radio search processing in complex electromagnetic environments.

The invention discloses a microwave photon channelized receiving method based on a double-vernier effect. The method comprises the following steps: S1, generating two paths of coherent optical frequency comb signals of which the initial frequency and the free spectral range are slightly different; s2, performing single side band modulation on the two paths of optical frequency comb signals by using the original radio frequency signal; s3, respectively carrying out wavelength division multiplexing on the two paths of modulated optical signals, separating out each comb tooth and radio-over-fiber signal components at the same frequency with each comb tooth in the other path of modulated optical signals, and then forming a local oscillator / signal pair by the comb teeth at the same frequency and the radio-over-fiber signal components; and S4, performing dual-output image frequency suppression mixing on each group of local oscillator / signal pairs. The invention further discloses a microwave photon channelization receiving device based on the double-vernier effect. Compared with the prior art, the channelization efficiency and the image frequency suppression effect can be greatly improved.

This document relates generally to wireless communications, including a first communication node determining at least one functional block for processing a physical channel or signal in an enhancement mode. The first communication node and the second communication node communicate and transmit a physical channel or signal processed in the enhancement mode by the at least one functional block.

The invention discloses a two-dimensional interferometer direction finding method based on a multi-frequency sparse area array. The method mainly solves the problems that in the prior art, the array arrangement space size is limited, and the two-dimensional DOA estimation precision is poor in a low signal-to-noise ratio scene. Comprising the following steps: 1) constructing a sparse plane physical array; 2) carrying out channelization processing on the broadband signal received by the antenna; 3) acquiring a vector signal model of the mapped channel by taking the center frequency of the Lth channel signal as a reference; 4) selecting effective channel data from L-1 channels, mapping all the center frequencies of the effective channel data to the center frequency of the Lth channel signal, and combining the signals; 5) calculating the covariance of the signal, and extracting the phase of a triangular element on the matrix; and 6) selecting a phase difference corresponding to the virtual baseline from the extracted phases, and realizing two-dimensional interferometer unambiguous direction finding by using a long and short baseline method. According to the method, two-dimensional DOA high-precision estimation can be effectively realized, and the method can be used for realizing two-dimensional direction finding of a target by a small unmanned aerial vehicle in a low-signal-to-noise-ratio environment.

The invention discloses a broadband linear frequency modulation signal splicing and real-time identification method, which comprises the following steps of: judging whether pulse description words of pulse strings containing linear frequency modulation type identifiers have correlation in time or not, if the pulse description words have the correlation, splicing the pulse strings with the correlation in time, and if the pulse description words do not have the correlation in time, splicing the residual pulse strings which do not meet the correlation in time, the method comprises the following steps of: determining whether the modulation slope meets a preset threshold, if the modulation slope is within a preset threshold range, considering that the modulation slope belongs to the same pulse string sequence and splicing the modulation slope, and then splicing cross-local oscillator target signals which are detected in a time-sharing manner and are obtained by splicing in a pulse data stream and carrying out radar radiation source identification. According to the scheme, time-frequency domain association fusion is gradually carried out on channelized full-pulse data by fully utilizing the time-frequency domain characteristics of the signals, split original signals are spliced and fused to form a new signal, and parameters of the new signal are recalculated, so that adverse effects caused by digital channelized detection and a frequency synthesizer module are reduced, and the detection accuracy is improved. And the target interception probability is improved.