30 results about "Coherent information" patented technology

Various kinds of business and other information are tracked in real time. A coherent information visualization, for example as a time line, automatically, simultaneously presents relevant information to a user across multiple dimensions. Tools are provided that allow the user to establish and manipulate multi-dimensional linkages to develop insights into information gathered from multiple domains.

The invention discloses an adaptive high-precision phase estimation method for an interferometric SAR, comprising the following steps of: structuring optimum weight vectors in combination with a Wiener filter theory, performing an eigen decomposition on an optimum covariance matrix composed of the optimum weight vectors to obtain a signal subspace and a noise subspace, adequately utilizing a corresponding pixel pair and the coherent information of the neighboring pixels thereof to structure a space spectrum function according to the orthogonality of the signal subspace and the noise subspace in a MUSIC (multiple signal classification) algorithm, and precisely estimating the interferometric phase between the corresponding pixels via a spectral peak searching. The optimum weight is obtained by only a Wiener filter without the need to determine a registration error and the direction thereof, thereby solving the problem of large computational burden in the traditional InSAR (interferometric synthetic aperture radar) interferometric phase estimation. The adaptive high-precision phase estimation method for the interferometric SAR disclosed by the invention is adaptive to the field of accurate surface parameter inversion of InSAR complex scene and the like.

A method of signal processing for use in reading data includes determining first and second waveforms, determining a cross-correlation of the first waveform with the second waveform, and determining a specific time delay corresponding to a maximum peak in the cross-correlation function. A filter is then applied based on the specific time value. The filter combines the first waveform and the second waveform so as to generate a filter output waveform including coherent information representing the data and including reduced incoherent noise.

The invention discloses a multipath utilization-based beam forming method. With the method adopted, the problem that multipath coherent signals cannot be effectively received in a low-altitude multipath environment in the prior art can be solved. The implementation process of the method includes the following steps that: an array radar acquires echo signal data, and solves a received signal covariance matrix Rxx; Toeplitz covariance matrix reconstruction is performed on the received signal covariance matrix, so that a new covariance matrix R is obtained; eigenvalue decomposition is performed on the reconstructed variance matrix, so that a noise subspace EN is obtained; a spatial spectral function S(theta) is formed according to the noise subspace; an angle corresponding to the peak value point of a spectral peak is found according to the spatial spectral function, namely the angle of a target is estimated; and with the estimated target angle adopted as a beam direction, beamforming isperformed. According to the method of the invention, with the estimated target angle adopted as the beam direction, beamforming is performed, and therefore, the multipath coherent information can be effectively utilized to improve the signal multi-noise ratio of echo signals. The method can be used for the effective reception of multipath coherent signals in a low-altitude multipath environment.

The invention discloses an MIMO radar multi-measurement vector DOA estimation method based on iterative near-end projection. The method comprises the following steps: converting high-dimensional echodata into a low-dimensional space to reduce the spatial dimension, performing singular value decomposition on the data subjected to dimension reduction, extracting a signal subspace to reduce the timedomain dimension, representing the non-convex non-smooth sparse optimization problem in the MIMO radar multi-measurement vector DOA estimation by using a near-end function optimization model, and then obtaining a near-end operator through an extrapolation step and an SCAD function in the iterative process to solve the optimization problem. According to the invention, the DOA estimation performance of the coherent information source under the conditions of low snapshot and low signal-to-noise ratio is superior to that of the existing algorithm.

What is new in this invention, it is the complete automation of the remote marking process. It is completely computer controlled and made possible by laser printer type marking/pointer equipment. Also, completely new is the concept of embedding digital information into a laser beam or other coherent information vector and attaching this way data/information to any object or place. New is the idea of using a discrete information vector not only as a beacon but also as a selector for the marking of more than one target objects. New is the idea of completely software controlled computerized digital marking of places or objects for closing motion control loops. No on-site human operators/soldiers needed. No position sensors needed anymore, nothing is bolted down, easy to reconfigure any environment. The invention is a major step in robotics and controls, improving considerably the eye-hand coordination of robots, making fully possible the action of the digital world on the real/physical world. A novel method and system is provided for simultaneous, non-invasive and non-contact marking for processing of targeted objects. The viewing, selection, marking, processing and feed-back is simultaneous and computerized.

A plurality of kinds of information relating to articles are stored in a manufacture-coherent information data base (20) by being related, so as to specify for each article a group of information relating to each article. A first code generating section (43) generates for each article a first code that indicates contents inherent to the article by using a part of the group of information specified for each article. A second code generating section (44) generates for each article a second code that includes information, which is of contents inherent to each article in the group of information and not included in the first code. A two-dimensional code generating section (45) generates an optical information code (two-dimensional code) that indicates the first code, and an identification code generating section (46) performs prescribed conversion processing to the second code to create character string data (identification code). A print control section (47) executes marking processing to mark the generated optical information code and the character string data on the article or to the object attached to the article.

The invention discloses a two-dimensional dynamic direction finding method for continuous quantum water evaporation in an impact noise environment, and belongs to the field of array signal processing.According to the method, a circular array infinite norm maximum likelihood equation designed according to a uniform circular array azimuth angle and a pitch angle two-dimensional dynamic direction finding problem is solved in a search region by utilizing a continuous quantum water evaporation calculation method, and the calculation amount is reduced by gradually narrowing the search interval; meanwhile, according to a water evaporation calculation method designed according to the quantum coding and the simulated quantum evolutionary equation, the convergence speed of the algorithm can be accelerated, the optimal two-dimensional wave arrival direction is quickly obtained, and the tracking precision of the dynamic wave direction in an impact noise environment is improved. According to the method, the searching speed is high, and the non-coherent signal source dynamic estimation in the two-dimensional arrival direction can be achieved, and the dynamic estimation of the coherent information source in the two-dimensional wave arrival direction can be realized, so that the method not only is suitable for a gaussian noise environment but also can be applied to an impact noise environment, and is wide in application prospect.

This invention relates to a message send/receive method realizing routing and bridge-connecting functions under an internet protocol setting bridge-connection module and bridge-connection port on a router to set up a common Ethernet address and IP address for it. When receiving message via bridge-connection port, the message is transferred to the bridge-connmection or IP module for sending or discarding. When sending the message, the related information on the router of sending message is compared with coherent information in the message or duplicated to be sent by the bridge-connection module. This invention method enables inter-bridge connection access in bridge-connection network, and inter-communication of IP protocols with non bridge-connection network.

The invention provides a self-adaption apodization method based on phase coherent information. The method includes the steps of conducting Hilbert change on all routes of channel signals to obtain the phase information, obtaining a dynamic weighting value of each channel through a certain self-adaption processing method according to preliminary phase estimation and the deviation of the phase information of each channel, and conducting beam forming at last. To improve the robustness of the self-adaption processing method, a phase variance sensitive threshold and multiple geometrical mapping relation curves between a phase difference and the weighting values are introduced into the calculation process of the dynamic weighting values. According to the self-adaption apodization method, by means of internal phase diversities, received in the beam forming process, of data of the multiple channels, side lobe signals and grating lobe signals are restrained, meanwhile, the width of a main beam is reduced, and transverse resolving ability of images is improved.

The invention discloses an adaptive coherent beamforming method based on multipath information, which mainly solves the problem that multipath coherent signals can not be effectively received in a low-altitude multipath environment in the prior art. The method comprises steps: 1, in a narrow-band multipath environment, a radar generates transmitting signals, and array radar echo data are obtained;2, according to the echo data, an array covariance matrix is calculated; 3, the array covariance matrix is subjected to characteristic decomposition to obtain signal subspace and noise subspace; 4, based on the orthogonality of the signal subspace and the noise subspace, a multipath reflection coefficient is estimated; 5, the multipath reflection coefficient is compensated to obtain the optimal weighting vector; and 6, according to the optimal weighting vector, adaptive beamforming is obtained. In the method, adaptive beamforming is carried out through compensating the reflection coefficientto obtain the optimal weighting vector, multipath coherent information is used effectively, the signal-to-noise ratio of the echo signals is improved, and the method can be used to effectively receivethe multipath coherent signals in a multipath environment.

The invention discloses a complex coherent signal three-dimensional visualization method comprising a step 1) of reading a complex coherent signal pairs s1 and s2 to be visualized, and constructing acomplex coherent matrix C by second-order statistical averaging; a step 2) of based on the complex coherent matrix C constructed in the step 1), calculating a parameter c0 reflecting the power sum ofs1 and s2, a parameter [beta] describing the relative power difference of s1 and s2, and a complex coherence coefficient [gamma] between s1 and s2; a step 3) of based on the parameters c0, [beta] and[gamma] obtained in the step 2), further calculating parameters c1, c2 and c3 so as to constitute a coherent vector c together with the parameter c0; a step 4) of constructing a three-dimensional coherent sphere based on the coherent vector c obtained in the step 3) so as to visualize all degree of freedom information of the complex coherent signal. The complex coherent signal three-dimensional visualization method completely describes the power information and the coherent information of the complex coherent signal by expanding a traditional two-dimensional circular map into a three-dimensional coherent sphere.

The invention discloses a method and a device for regulating signals, which are capable of increasing the locating accuracy by increasing the stripping degree of carrier waves and spreading codes in the signals. The method comprises the steps of obtaining frequency mixing signals by carrying out frequency mixing on signals which are currently received and signals which are locally recurrent, obtaining coherent information according to the frequency mixing signals and the spreading codes which are locally generated, processing the coherent information, obtaining a processing result, regulating signals which are locally generated by adopting the processing result, and stripping the carrier waves and the spreading codes in the signals which are received at the next moment from each other by adopting the signals which are regulated. According to the method and the device, disclosed by the embodiment of the invention, the carrier waves and the instantaneous codes which are locally generated can be respectively consistent with receiving carrier waves and receiving codes, and thus the stripping degree of the carrier waves and the spreading codes in the signals which are received at the next moment can be increased.

The invention discloses a wave beam space direction finding method under an impact noise environment. The wave beam space direction finding method comprises the steps: signal sampling data are obtained and subjected to wave beam space processing, and a target equation of maximum likelihood estimation of a wave beam space is obtained; a dolphin group is initialized, and a belief space is initialized; the adaptability degree is calculated, and the global optimal position of the dolphin group is recorded; the dolphin group is divided into different equal-scale teams, and each dolphin in the teamsobtains the temporary position according to information sharing; the temporary adaptability degree is calculated, the local optimal position of each dolphin is updated; the positions of the dolphinsare updated according to a cultural mechanism; the adaptability degree is calculated, the local optimal position of each dolphin is updated, the global optimal position of the dolphin group is updated, and according to part of the local optimal positions, the belief space is updated; and whether the maximum number of iteration times is reached or not is judged, and the direction finding result isobtained and output. Coherent information sources are subjected to effective direction finding under the impact noise environment, and the advantages of high convergence speed and high convergence accuracy are achieved.

This invention relates to a method for realizing whole network numbers carried service by a route service device, including combining the user number and area number to an exclusive user character number when numbering. After a user shifts the call across the area, the shift out or in soft exchange equipment reports to the rout service device of its father node, the received route service device refreshes the route information lists coherently and synchronizes to related nodes, the user shift-in soft exchange equipment sets up coherent information of the said user at the same time. When other users call the user across the area, the soft exchange equipment where the dialing situates sends a inquiry request to the route server of its father node containing the character number and sets up call flow after getting the route information of the shift user exchange device.