65 results about "Propagation matrix" patented technology

OFDM signals each including a plurality of subcarriers (including data carriers and pilot carriers) orthogonal to each other are received by a plurality of receiver antennas. The received OFDM signals are each OFDM-demodulated into a plurality of receive subcarriers. Based on the plurality of receive subcarriers, the propagation coefficients of a plurality of space paths are estimated. An inverse matrix of a propagation matrix whose elements are the estimated propagation coefficients is calculated. Interference cancellation is performed for the plurality of receive subcarriers by using the inverse matrix, and transmit subcarriers multiplexed in space are estimated. A reliability of the inverse matrix is calculated. A pilot carrier is extracted from the estimated transmit subcarriers, and the extracted pilot carrier is weighted according to the reliability. An error included in the plurality of receive subcarriers is corrected based on the weighted pilot carrier.

Enhancement of wireless Channel Order and rank (ECHO) systems and ECHO repeater devices for enhancement of a wireless propagation channel for point to point or point to multipoint radio configurations are disclosed. The enhancement may be used for MIMO communications channels. Aspects support a richer multipath environment to increase the rank of the channel propagation matrix and / or to increase the magnitude of the coefficients of the propagation matrix between two or more radios. Such enhancement is applicable to backhaul radios in terms of increased range or in the number of supportable information streams. The installation, provisioning, optimization, control, monitoring, and adaptation of such devices within a network of backhaul radios is also disclosed. Wireless links and control between IBR and ECHO devices, and between ECHO devices and other ECHO devices, are also disclosed.

The present invention discloses a system for visualizing sound source energy distribution and a method thereof, wherein a propagation matrix and a window matrix are obtained firstly; next, an inverse operation of the propagation matrix is performed; next, a multiplication operation of the result of the inverse operation and the window matrix is performed; next, the result of the multiplication operation is transformed from the time domain to the frequency domain; thus, a sound source energy distribution reconstructor is established; then, an array of microphones is used to receive the sound source signals; next, a multi-channel capture device transforms the received sound source signals into digital sound source signals; lastly, a convolution operation is performed on the digital sound source signals and the sound source energy distribution reconstructor to obtain a visualized sound source energy distribution. Therefore, the present invention can provide the energy distributions of nearfield / farfield stable-state / unstable-state sound sources.

Provided is a system and method for placing trade orders on an electronic exchange using a client terminal. The client terminal includes a user input device and a display device. The method includes displaying a spread matrix on a trading screen of the display device, the spread matrix displaying at least two base dartboards and at least one compound dartboard. The method also includes displaying a market depth of a first tradable instrument on the first base dartboard, displaying a market depth of a second tradable instrument on the second base dartboard, and displaying on the compound dartboard a dynamic display of a plurality of prices of a market depth of a compound. The compound represents a spread market of the first and second tradable instruments. The method further includes displaying a selected-price display on the compound dartboard, the selected-price display displaying a selected price of the plurality of prices in response to detecting a first user action via the user input device, and placing a trade order for the compound at the selected order price on an exchange host system in response to detecting a second user action via the user input device.

OFDM signals each including a plurality of subcarriers (including data carriers and pilot carriers) orthogonal to each other are received by a plurality of receiver antennas. The received OFDM signals are each OFDM-demodulated into a plurality of receive subcarriers. Based on the plurality of receive subcarriers, the propagation coefficients of a plurality of space paths are estimated. An inverse matrix of a propagation matrix whose elements are the estimated propagation coefficients is calculated. Interference cancellation is performed for the plurality of receive subcarriers by using the inverse matrix, and transmit subcarriers multiplexed in space are estimated. A reliability of the inverse matrix is calculated. A pilot carrier is extracted from the estimated transmit subcarriers, and the extracted pilot carrier is weighted according to the reliability. An error included in the plurality of receive subcarriers is corrected based on the weighted pilot carrier.

The invention discloses a propagation characteristic-based short-circuit voltage sag characteristic quantity calculation method of a power distribution network. The propagation characteristic-based short-circuit voltage sag characteristic quantity calculation method comprises the steps of acquiring a parameter of the power distribution network, calculating a steady-state power flow of the power distribution network to obtain a steady-state voltage of each node of the power distribution network, and calculating load equivalent impedance; forming a conversion matrix of a transformer according toa transformer parameter, correcting equivalent impedance among nodes, and building a propagation matrix of voltage sag passing through the power distribution line; considering a power supply-fault point connection line as a fault feeder, considering other feeders as non-fault feeders, building a voltage slag characteristic equation of the fault feeder, and building a voltage sag propagation characteristic equation from a fault source to a load end by combining the transformer and a line propagation matrix; and calculating voltage sag characteristic quantity distribution in the power distribution network under different fault types according to the voltage sag propagation characteristic equation. A parameter of the power distribution network and the structure characteristics thereof can beutilized, the voltage sag distribution characteristic is analyzed, the method is simple and effective, and engineering application is easy.

The invention discloses a protein function prediction method based on network propagation, and the method comprises the following steps: building an undirected weighted network according to a proteininteraction network topological structure, and enabling the undirected weighted network to be represented as an undirected graph adjacency matrix M; performing calculating to obtain an initial propagation distance matrix MI according to the protein structural domain information and the protein compound information; iteratively calculating a network propagation distance between proteins according to the undirected graph adjacency matrix M and the initial propagation distance matrix MI to obtain a network propagation matrix MP; gradually adding adjacent nodes of the test protein according to thenetwork propagation matrix MP to form function modules, and forming a candidate function list by a plurality of function modules; scoring and sorting the candidate functions in the candidate functionlist, and selecting a plurality of function annotation test proteins with the top rank. According to the method, the fusion mode of multi-source biological data in protein function prediction methodresearch is improved, the negative influence of false positive and false negative in the interaction network on prediction is reduced, and the accuracy of protein function prediction is greatly improved.

The invention discloses a method for extracting reflection transverse waves from dipole transverse wave data and relates to the technical field of array sound wave logging information treatment and application. The method includes steps of 1, performing waveform restoration on dipole transverse waves; 2, performing band-pass filtering on the transverse wave data; 3, performing time slowness analysis on the transverse wave data and acquiring transverse wave change range in different depths; 4, establishing a transverse wave data propagation matrix; 5, solving reflection transverse wave data. According to the invention, dipole transverse wave information and instrument structure information are combined for comprehensive analysis, multiple direct wave speeds are adopted for filtering treatment in stratums having severe transverse wave dispersion, so that direct wave removal incompleteness caused by single-speed filtering is avoided.

The invention discloses a radio frequency performance testing method and device for wireless equipment and a tester, and the method comprises: collecting the power return information of a tested piece; obtaining a propagation matrix according to the power return information, and obtaining a loaded inverse matrix according to the propagation matrix so as to form a virtual wire between an instrumentoutput port and a receiver port of the tested piece; and according to the throughput rate test signal, carrying out transmission through the virtual wire so as to carry out performance test on the tested piece and generate a radio frequency performance test result. According to the method, the virtual wire can be solved according to the power return information, the test efficiency is improved while the test accuracy is improved, and the test applicability is improved.