58 results about "Channelized" patented technology

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 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.

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 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 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 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.

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.

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 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.

The invention provides a gain control method, system and device for a multi-system shared radio frequency front end and a medium, and the method comprises the following steps: converting a broadband analog signal output by the shared radio frequency front end into a broadband digital signal, and carrying out the digital channelization processing, thereby obtaining a plurality of digital sub-channel data streams; detecting the real-time power of each sub-channel, and identifying a strong signal component and a weak signal component; determining a radio frequency gain upper limit value based on the front-end linearity index and the strong signal power, and determining a radio frequency gain lower limit value based on the weak signal demodulation performance threshold, the noise floor of the analog-to-digital converter and the power; if the upper limit value is greater than or equal to the lower limit value, adjusting the analog gain to a target value between the two, otherwise, adjusting to the upper limit value; and after analog gain adjustment is completed, digital compensation processing is applied to each sub-channel. By implementing the technical scheme provided by the invention, the linearity and the sensitivity can be considered in a strong and weak signal coexistence scene, the gain adaptive fine control is realized, and the receiving quality of the system is improved.

A signal processing system includes channelizer circuitry that includes first delay circuitry that receives first data. The channelizer circuitry generates first combined data based on the first data and a first coefficient set and second combined data based on the first data and a second coefficient set. The first coefficient set differs from the second coefficient set. Further, the channelizer circuitry outputs a first signal based on at least one of the first combined data and the second combined data.

This invention relates to the field of radio communication and signal processing technology, specifically to a multi-band adaptive frequency hopping reconnaissance signal processing system for monitoring wireless communication networks. The system includes: acquiring broadband digital data to generate a time-frequency matrix and constructing steady-state time-frequency reference data accordingly; generating simulation excitation parameters based on preset parameters; calculating the theoretical residual between the excitation parameters and the reference data, as well as the actual residual between the real-time data and the reference data; calculating the time-frequency structural similarity between the theoretical and actual residuals; triggering the generation of narrowband data using channelization resources when the matching degree reaches a preset threshold, otherwise not triggering; performing parameter estimation and modulation identification on the narrowband data, and dynamically updating the reference data or simulation excitation parameters based on the decision and identification results. This invention significantly reduces the probability of false triggering by misjudging environmental noise as a frequency hopping target.

The invention discloses a broadband digital multi-beam joint detection method and system based on large beam amplitude selection, and belongs to the field of signal processing. Digital multi-beam forming is carried out on AD channel echo data of a receiving array plane; uniformly dividing the broadband signal into N paths of parallel narrowband channels according to a preset frequency interval by adopting a multi-filtering channelization technology; for the same channel, comparing each range gate signal amplitude of all beams on the channel, selecting a value with the maximum amplitude as the amplitude of a virtual detection beam of the channel, and performing signal detection; in each channel, according to the start of the signal envelope, comparing the average amplitude at the initial position of the envelope, determining a wave beam with the maximum amplitude as the arrival direction of the signal, marking the wave beam number of the signal as the wave beam, and switching the original data of the wave beam as the input of fine measurement; and in each channel, measuring each parameter of the signal by using the data of the selected beam.

The invention discloses a microwave photon channelization receiving method and receiver based on linear frequency modulation local oscillation, and the method comprises the steps: employing a linear frequency modulation signal as a local oscillation source, carrying out the power division of the linear frequency modulation signal into multiple paths, and introducing different delays to synthesize the local oscillation of each sub-channel, and the channelized receiving of the input radio-frequency signal is realized by combining optical signal mixing and combining, intermediate-frequency filtering and digital acquisition. According to the microwave photon channelization receiving method based on the linear frequency modulation local oscillator and the receiver, the linear frequency modulation local oscillator is combined with different optical delays to generate local oscillator signals of all sub-channels, and the problem that in a traditional channelization receiver, a plurality of dot frequency local oscillator synthesis links are complex is solved.

This invention relates to the field of radio communication and signal processing technology, specifically to a multi-band adaptive frequency hopping reconnaissance signal processing system for monitoring wireless communication networks. The system includes: acquiring broadband digital data to generate a time-frequency matrix and constructing steady-state time-frequency reference data accordingly; generating simulation excitation parameters based on preset parameters; calculating the theoretical residual between the excitation parameters and the reference data, and the actual residual between the real-time data and the reference data; calculating the time-frequency structural similarity between the theoretical and actual residuals; triggering the generation of narrowband data using channelization resources when the matching degree reaches a preset threshold, otherwise not triggering; performing parameter estimation and modulation identification on the narrowband data, and dynamically updating the reference data or simulation excitation parameters based on the decision and identification results. This invention significantly reduces the probability of false triggering by misjudging environmental noise as a frequency hopping target.

The application discloses a kind of based on IFFT's beam synthesis data reconstruction implementation method, belong to radar technical field.In sampling rate f s Below, received each frame N point channelization data (x0 [k],x1 [k],…x i [k],…x N‑1 [k]) is M times extraction, extracts with signal center frequency f c corresponding data point x i [k] as center N / M point carries out N / M point IFFT, wherein x i [k] is located zero frequency, as shown, other data points are arranged according to frequency relative relationship, if data point is not enough, can carry out zero filling processing, then IFFT result is carried out M times interpolation, after interpolation data is through low-pass filter with parameter [0M / N 2M / N 1], finally, after filtering data is multiplied with, spectrum shift is completed, wherein shift frequency can complete the recovery of original signal.

The invention relates to a channelized FPGA decomposition and reconstruction implementation method and system based on a WOLA structure, and belongs to the technical field of signal processing, and the method comprises the steps: intercepting L data points from a to-be-decomposed signal according to an m value, and carrying out the weighting processing on the L data points and a corresponding first WOLA structure filter bank coefficient point by point to obtain a first weighted signal; dividing the first weighted signals into L / K groups according to the number K of the sub-channels, and accumulating the data with the same sequence number in each sub-channel to obtain a first accumulated signal; performing FFT on the first accumulation signal to obtain a first transformation signal; converting the first conversion signal to a frequency domain, and after row-column conversion, integrating the same sub-channels to obtain a channel decomposition signal; and performing signal reconstruction processing on the channel decomposition signal after signal processing to obtain a signal reconstruction result. In channelized decomposition and reconstruction, the extraction multiple and the channel number do not need to be limited to be in a fixed proportion, odd and even channels do not need to be processed separately, implementation of an FPGA is facilitated, and the implementation effect is enhanced.

The invention discloses a satellite-borne multi-scale hybrid broadband switching system and method, and the system comprises a satellite-borne microwave photon transparent transponder which is used for receiving a radio frequency ultra-wideband signal of a first bandwidth scale, and completing the satellite-borne communication switching of the first bandwidth scale; the satellite-borne optical domain channelization switch is used for receiving the first bandwidth scale ultra-wideband mixing optical signal of the satellite-borne microwave photon transparent transponder and completing second bandwidth scale satellite-borne communication switching; the satellite-borne digital switch is used for receiving a second bandwidth scale broadband communication signal of the satellite-borne optical domain channelized switch and completing third bandwidth scale or data packet scale satellite-borne communication switching; and the satellite-borne comprehensive management and control machine is used for receiving the signaling channel data of the satellite-borne digital switch, completing instruction analysis and distribution, and managing and controlling the satellite-borne communication exchange. According to the invention, the utilization efficiency of the on-satellite spectrum and power is improved, a satellite communication system can be supported, and the capabilities of large port bandwidth, high communication capacity, fine exchange scale, flexibility and controllability, multi-satellite networking and the like can be realized at the same time.

This invention proposes an array signal detection method based on energy focusing in the space, time, and frequency domains. The implementation steps are as follows: initializing parameters; performing dynamic digital channelization processing on each array signal; performing beamforming processing on each reconstructed signal vector; and obtaining the detection results of the array signals. In the process of obtaining the detection results of the array signals, this invention sequentially performs dynamic digital channelization, beamforming, and autocorrelation accumulation processing on the array signals of each channel, achieving step-by-step energy focusing in the frequency, spatial, and time domains. This avoids the limitations of existing technologies that directly perform time-domain accumulation after channelization, resulting in limited energy gain and the inability to distinguish signals from different directions within the same frequency band. This effectively improves the signal separation capability in multi-signal environments and the detection accuracy under low signal-to-noise ratio conditions.