3667results about How to "Suppress interference" patented technology

A method for communication over a wireless local area network (WLAN) includes receiving uplink signals from a plurality of stations in the WLAN. Responsively to the uplink signals, a set of the stations is selected for inclusion in a spatial multiplexing group. Downlink signals are transmitted simultaneously to the stations in the set using spatial division multiplexing (SDM).

The proposal for eliminating inter-cell interference based on cooperation with the prior base station has problems such as resources occupation and Backhaul load increment. The invention provides a multi-base station cooperative multiple-input multiple-output (MIMO) with low information interaction in a wireless network and a scheduling method and a device thereof. The scheduling method comprises: a base station acquires information relevant to signal quality between the base station and each mobile terminal and reports to a scheduling apparatus, wherein the reported signal quality relevant information is preferably a relative signal strength indicator (RSSI) or a channel quality indicator (CQI) with small data size; the scheduling apparatus selects a service base station for each mobile terminal and determines a specific base station to eliminate the interference from a specific mobile terminal; and the scheduling apparatus further controls to correspondingly transmit service data of the mobile terminal to the service base station; the base station determines the serviced terminal and the terminal of which the interference is eliminated. When servicing the mobile terminal on a time-frequency resource and eliminating the interference from other base stations, the base station only needs to acquire channel state information of the mobile terminal associated with the base station to the base station on the corresponding time-frequency resource and calculate a pre-coded matrix, so as to pre-code mobile terminal service data from the service base station and generate downlink signals to be transmitted; and the process is independently carried out in various base stations.

A method is provided for communications in a cellular network (1) comprising a plurality of mobile stations (MS1 to MS3) adapted for performing wireless communications with at least one base station (BS1, BS2) using a first transmission technology, the method comprising: forming a cooperating cluster (C) comprising two or more of the mobile stations (MS1, MS2), and performing short-range communications between the mobile stations (MS1, MS2) of the cooperating cluster (C) using a second transmission technology being different from the first transmission technology for improving, for at least one mobile station (MS1, MS2) of the cluster (C), the performance of the wireless communications with the base station (BS), preferably by using MIMO techniques for at least one of interference suppression and cancellation, in particular by using at least one of transmit precoding for uplink transmissions and receive antenna weighting for downlink reception. A mobile station (MS1, MS2) for forming a cooperating cluster (C), a cooperating cluster (C) comprising at least one such mobile station (MS1, MS2), and a cellular network (1) are also provided.

It is aimed to provide a perpendicular magnetic recording medium capable of dealing with an ultra-higher recording density than before and its manufacturing method.

The present invention concerns a perpendicular magnetic recording medium including at least a seed layer made of noncrystalline ceramic, a crystalline orientation control layer and a magnetic layer made of a material mainly containing a FePt alloy in this order on a substrate. This perpendicular magnetic recording medium is suitably manufactured by forming at least the seed layer, the orientation control layer and the magnetic layer made of the material mainly containing the FePt alloy in this order on the substrate by sputtering, wherein the magnetic layer is formed at a predetermined temperature of 500° C. or less.

The invention discloses a power signal frequency detection method and a power signal frequency detection system based on phase modulation. The method comprises the steps: sampling a power signal according to preset signal time span and preset sampling frequency, so as to obtain an input signal sequence; measuring the frequency of the input signal sequence, so as to obtain the initial frequency of the power signal, and subtracting the input signal sequence and the plus or minus 1 Pi phase-shift sequence of the input signal sequence by using the initial frequency as reference frequency, so as to obtain two phase modulation sequences of which phases change along with the input signal frequency; respectively mixing, filtering and integrating the two phase modulation sequences, so as to obtain the phases of the two phase modulation phases for frequency measurement. By implementing the power signal frequency detection method and the power signal frequency detection system, frequency measurement results with higher accuracy can be obtained.

The invention relates to identification, image processing and the like, in particular to an artificial neural network-based multi-source gait feature extraction and identification method, which aims to reduce inferences with external factors such as complex background and shelters so as to more accurately extract the effective information reflecting the walking characteristics of the moving people and improve the gait identification accuracy. The technical scheme of the invention comprises the following steps: separately acquiring the gait data by using a camera and a pyroelectric infrared sensor; extracting the skeleton feature parameter and Radon change peak characteristic parameter from the image source information acquired by the camera, and for the pyroelectric infrared source information, converting an acquired voltage signal into frequency domain characteristic parameter; merging the skeleton feature parameter, the Radon change peak feature parameter and the frequency domain characteristic parameter which are subjected to dimension reduction and corresponding signal process; and finally, realizing classified identification of the merged characteristics by using a BP neutralnetwork as the classifier and evaluating the identification effect. The method is mainly applied to identification.

An operational air conditioning mode is allowed to set to a temperature uniformization mode and a spot air conditioning mode, and is selectively switched between these modes automatically by a control means (53) or manually. In such an embodiment, a comfortably air-conditioned state is obtained in all the areas of a space to be air-conditioned W during air conditioning performed in the temperature uniformization mode, and the comfort is ensured by intensively air-conditioning the surroundings of a person during air conditioning performed in the spot air conditioning mode. At the same time, since an unnecessary air conditioning is not provided to a region without the presence of a person, energy conservation is improved, for example, and thus the comfort of air conditioning and energy conservation are both achieved.

A method of notifying resource allocation for Demodulation Reference Signal (DMRS) is provided. A base station notifies to a user equipment a power offset value between an average EPRE value for data symbols and an average EPRE value for the DMRS at each layer in a semi-static or static manner. Also, the base station dynamically notifies to the user equipment a current channel rank or a current DMRS distribution pattern for the user equipment. The user equipment determines an allocated DMRS antenna port based on a correspondence between the received channel rank and an allocation of DMRS antenna port, thereby obtaining resource allocation information for the DMRS. The signaling overhead for power allocation in the system can be reduced, the efficiency of power amplifier can be improved and the flexibility of system scheduling can be increased. A method of notifying antenna port resource allocation for DMRS is also provided.

An integrated-cavity output spectroscopy (ICOS) instrument adapted for measuring liquid samples has a low-scatter flow cell arrangement passing through a stable optical cavity defined by an arrangement of two or more mirrors. The flow cell provides a sample volume within the cavity of at most one microliter at any given time. The optical cavity has an effective cavity length of at most one centimeter and mirror radii of curvature for the stable cavity arrangement are much longer than the cavity length. A light beam with stable characteristics is introduced into the cavity, passes through the liquid sample cell multiple times, and a detector measures a portion of the light from the cavity. The light measurement is analyzed to determine absorption by the liquid sample, and related information.

The radio base station apparatus comprises: a plurality of antenna elements for transmitting and receiving radio signals; a detection unit for detecting information about an uplink dedicated channel corresponding to a first user equipment from signals received via the plurality of antenna elements; a directivity control unit for determining directivity of transmission power based on the information detected by the detection unit when signals are transmitted to the first user equipment via the downlink shared channel; and a transmission unit for transmitting signals with the directivity determined by the directivity control unit.

The invention discloses a character detection method and a device. The character detection method comprises steps of receiving image to be detected, generating a character area probability graph of the whole text of the image to be detected which is generated by a semantic prediction model, wherein the character area probability graph uses different the pixel value area to distinguish the Chinese character area of the image to be detected and the non-Chinese character area of the image to be detected and performing segmentation operation on the probability graph of the Chinese character area in order to determine the Chinese character area. The Character detection method disclosed by the invention can detect the characters of various languages, directions, colors, fonts and sizes while effectively inhibiting the interference of the complex background. Besides, the Chinese character detection method and the device have characteristics of strong robustness and effectively resisting the interferences of the image noise, image fuzziness, the complex image background and the non-uniform light irradiation.

A method and apparatus derives an impairment correlation matrix to process signals received at a wireless receiver over multiple paths of a multi-path channel. The receiver includes first and second impairment correlation estimators for estimating first and second impairment correlation matrices based on despread symbols received over multiple paths of a multi-path channel. The receiver then derives the impairment correlation matrix based on the estimated first and second impairment correlation matrices. The receiver may combine traffic despread values to suppress interference using weighting factors calculated based on the derived impairment correlation matrix. Further, the receiver may estimate a signal-to-interference ratio based on the derived impairment correlation matrix.

The invention relates to a flexible satellite locus linearization attitude control method based on a disturbance observer. The invention aims at solving problems that a single locus linearization control method is poor in capability of inhibiting interference, is poorer in robustness, and does not consider external interference and the impact from flexible accessories. The method comprises the steps: employing Euler angles for describing attitudes of a spacecraft, employing an idea of equivalent disturbance, and building a flexible spacecraft dynamics and kinetics equation; solving the pseudo-inverse of a controlled object under the condition of neglecting equivalent disturbance, designing a quasi-differentiator of a specific type, and obtaining the nominal control of an expected locus; and designing a linear time varying adjuster through proportion-integration control. The method gives consideration to the influence of equivalent disturbance, designs the disturbance observer, and guarantees the asymptotic convergence of a tracking error of a flexible spacecraft. The method improves the anti-interference capability of a system, and improves the robustness of the system. The method is used in the attitude control field of flexible satellites.

Disclosed are an inter-cell resource coordination method and device. By applying the technical solution in the embodiments of the present invention, resource scheduling and protection resource block reservation are performed according to the acquired resource scheduling information and up/downlink configuration information about a surrounding cell, so that an adjacent cell can select a suitable resource allocation manner, suppressing inter-cell interference, especially up/downlink signal interference.

The invention discloses an indoor fire detection method based on a video monitoring platform. The indoor fire detection method includes the steps: converting formats of inputted video code stream; preprocessing the video stream; detecting movement of the video stream to obtain movement pixels; extracting connected domains of the movement pixels meeting conditions; detecting multilayer colors of the connected domains and reserving the connected domains with flame and smoke characteristic colors; calculating the corresponding area variation and the central movement speed of the connected domains conforming to flame color characteristics to analyze dynamic variation; performing wavelet transformation for the connected domains conforming to smoke color characteristics, extracting high-frequency components and calculating the decay degree of the high-frequency components; calculating the perimeter and the area of the connected domains meeting the conditions and analyzing static shapes; andanalyzing by considering all the conditions and finally judging whether fire occurs or not. By the aid of the method, flame and indoor flicker lamps can be effectively and rapidly distinguished, and false alarm rate is greatly reduced.