140results about How to "Avoid signal loss" patented technology

For an especially low loss and echo free communication between several participants in a room (1) an inventive process for the compensation of losses of a signal(S) along a transmission path between at least one transmission point (6) and one receiving point (4) in a room (1) determining the transmission path of signal (S) and via the transmission paths at least one parameter of an associated transmission function will be determined, whereby via the determined parameters the signal level for a given position (P1 through P4) on the transmission path is controlled. Additionally an especially suitable device is provided for the implementation of the process.

The invention relates to an image mosaic processor on the basis of an FPGA (Field Programmable Gata Array), which is characterized by comprising a set of DVI (Digital Video Interactive) digital decoding circuit, a set of FPGA digital video processing circuit and a set of output interface circuit, wherein an external digital signal is connected with the DVI digital decoding circuit; a digital video signal with the minimum transformation differential signal form is subjected to decoding processing; an obtained video pixel information flow is directly fed into the FPGA digital video processing circuit; after being processed by an image processing algorithm, the signal is subjected to encoding processing to obtain the digital video signal of the minimum differential signal; and the digital video signal of the minimum differential signal is output to a mosaic wall display through the output interface circuit. The invention also provides an image mosaic method on the basis of the system. The image mosaic processor and the image mosaic method have the advantages that the image mosaic processor and the image mosaic method are not limited by the bandwidth of a PCI (Peripheral Component Interconnect) bus or the aspects of acquiring and processing capabilities.

A dual carrier modulator that modulates an orthogonal frequency division multiplexing (OFDM) carrier, includes an input part receiving a predetermined number of coded bits; a memory part storing the coded bits received through the input part; a detection part detecting four bits among the coded bits in a predetermined order; and an operation part generating a modulated symbol comprising a real part and an imaginary part, using the four detected bits and a predetermined unitary matrix. Here, one of the detected four bits is included in a real part of a first modulated symbol and in an imaginary part of a second modulated symbol. Accordingly, loss of signals caused by mismatching between an In-phase channel and a Quadrature channel can be prevented.

Selected data (LSP1, LSP2) is monitored among other data passing through label switched paths (LSPs) of a communications network of interconnected label switching routers (LSR–LSR4). The method comprises designating at least one of the routers (LSR3) as a monitoring station and at least one of the routers (here LSR3 also) as a probe interface station, and connecting a probe apparatus to that interface station. The monitoring station (LSR3) is configured to multicast forward the selected data for monitoring additionally to the probe apparatus via the probe interface (506). Also disclosed is a probe apparatus including means for configuring the router to perform multicast forwarding of selected data to the interface.

The invention provides an environment modeling method applicable to navigation of automatic piloting vehicles. One of the key problems needing to be overcome for the navigation of automatic piloting vehicles is to modeling an environment in which a vehicle pilots, to distinguish sceneries in the environment and to convert environmental information into parameterized information which can be used for intelligent obstacle avoidance and path planning of an automatic piloting vehicle. According to the invention, a laser sensor is provided at the front of the automatic piloting vehicle; a series of steps like measurement of spatial distance between the center of the laser sensor and the center of the vehicle are carried out; the whole environment is modeled by utilizing laser point sequences acquired in the driving process of the vehicle. Displacement and course angles of the vehicle are calculated by registering observation of the laser sensor at adjacent sampling time, which is a self-contained scheme and can effectively avoid the problem of LOS (lost of signals) in extreme environments in similar methods which employ a scheme bases on a constellation system; in the method provided in the invention, the laser point sequences in laser beams are processed with a method of inference based on a probabilistic graph model, which enables geometrical characteristics of scenery contours to be utilized and managed intelligently, and therefore, higher accuracy in environment modeling is obtained in the invention.

A system and method for providing a dark-blood technique for contrast-enhanced cardiac magnetic resonance, improving visualization of subendocardial infarcts or perfusion abnormalities that may otherwise be difficult to distinguish from the bright blood pool. In one technique the dark-blood preparation is performed using a driven-equilibrium fourier transform (DEFT) preparation with motion sensitizing gradients which attenuate the signal in the ventricular cavities related to incoherent phase losses resulting from non-steady flow within the heart. This dark-blood preparation preserves the underlying contrast characteristics of the pulse sequence causing a myocardial infarction to be bright while rendering the blood pool dark. When applied to perfusion imaging, this dark-blood preparation will help eliminate artifacts resulting from the juxtaposition of a bright ventricular cavity and relatively dark myocardium.

The invention discloses a train compartment WIFI (Wireless Fidelity) coverage network. The train compartment WIFI coverage network comprises a train wired Ethernet communication subsystem, a train wireless coverage subsystem, a train-ground communication subsystem and an on-board service subsystem, wherein the train wired Ethernet communication subsystem comprises switches distributed in compartments and Ethernet cables for connecting the switches; the Ethernet cables bridge the compartments to interconnect the switches in the compartments, thereby forming a looped network for a whole train; the train wireless coverage subsystem is used for providing wireless access points (APs) for terminals; and the train-ground communication subsystem is used for providing a communication channel for network data in the train, and updating content of a train on-board server. According to the train compartment WIFI coverage network, wireless APs and antennas are deployed in the compartments to realize full WIFI coverage of the compartments, so that passengers can get high wireless signal coverage quality through the antennas which are uniformly distributed at different positions of the compartments; signal loss due to penetration of a metal train body in the prior art is avoided; and a user access capability under a train full-load condition is improved.

The invention discloses an intelligent substation clock synchronization reliability method capable of improving network sampling. The method comprises the steps of selection of a master clock for an external time source, switching of the external time source and self-adaptation delay compensation between the master clock and an extenpasion clock. The method can achieves reliable switching of the external source of the clock and effectively solves the problem that source switching or loss of a part of the external source causes time signal instability and signal loss. In addition, the method can effectively improves the stability for a clock device to trace external source signals, the clock device can effectively select a reliable external source, abnormal work, caused by time abnormality of the external source, of the clock device is prevented, and the long-term stability of time output of the clock device is guaranteed. The method can further achieve main expansion time tick and finish self-adaptation delay compensation of a main expansion chain simultaneously and effectively improves the reliability and the high accuracy of output time of a clock system of a substation.

A system and method for providing a dark-blood technique for contrast-enhanced cardiac magnetic resonance, improving visualization of subendocardial infarcts or perfusion abnormalities that may otherwise be difficult to distinguish from the bright blood pool. In one technique the dark-blood preparation is performed using a driven-equilibrium fourier transform (DEFT) preparation with motion sensitizing gradients which attenuate the signal in the ventricular cavities related to incoherent phase losses resulting from non-steady flow within the heart. This dark-blood preparation preserves the underlying contrast characteristics of the pulse sequence causing a myocardial infarction to be bright while rendering the blood pool dark. When applied to perfusion imaging, this dark-blood preparation will help eliminate artifacts resulting from the juxtaposition of a bright ventricular cavity and relatively dark myocardium.

The invention discloses antenna equipment shared by multiple systems, which aims to solve the problems of signal loss caused by the introduction of a combiner in the conventional multi-system antenna fusion technology and roof resource shortage. In an antenna array of the antenna equipment, a part of the array is used for receiving and transmitting signals of a fourth generation or second generation mobile communication system, and antenna ports corresponding to the array are used for connecting master devices of the fourth generation or second generation mobile communication system; and in the antenna array of the antenna equipment, the rest part of the array is used for receiving and transmitting signals of a third generation mobile communication system, and antenna ports corresponding to the array are used for connecting master devices of the third generation mobile communication system.

A vehicle restraint having a fixed member such as a frame mounted to a dock face and a hook movable relative to the fixed member for engaging a portion of a vehicle and restraining movement of the vehicle away from the dock. A non-contact sensor is employed to determine engagement of the hook with a portion of the vehicle. The sensor is positioned to provide an effective magnetic field in the zone of contact so that engagement with an ICC bar on the vehicle can be ascertained. The sensor may also be a sensor bar pivotally movable respect to a vertical restraining member. The sensor bar houses a sensor that determines relative movement between itself and a target to provide a signal indicative of engagement when the sensor bar is depressed by the vehicle.

An ESD clamp circuit applied to a power amplifier is provided. The ESD clamp circuit includes a first line, a second line, a first circuit, a second circuit, an ESD detecting unit, a buffer unit, and an ESD clamp unit. The first line is coupled to the output terminal of the power amplifier. The first circuit is coupled to the first line. The second circuit is coupled to the first circuit. The ESD detecting unit is coupled to the first circuit and the second line. The buffer unit is coupled to the second circuit, the second line and the ESD detecting unit. The ESD clamp unit is coupled to the buffer unit, the first line and the second line. Therefore, at normal operation mode, the problem of signal loss caused by the leakage current of ESD clamp circuit can be avoided.

Surface treated copper foils for use in high speed circuits on the order of 100 MHz or greater contain a reverse treated layer of copper nodules on the drum side of the electrolytically deposited copper foil to form a lamination side to be laminated to a dielectric material to form a copper clad laminate. Methods of forming the surface treated copper foil, and printed circuit boards (PCB) from thecopper clad laminates are also described. The surface treated copper foils, copper clad laminates and PCBs can be incorporated into various electronic devices in which high speed signals are employed, including personal computers, mobile communications, including cellular telephones and wearables, self-driving vehicles, including cars and trucks, and aviation devices, including manned and unmanned vehicles, including airplanes, drones, missiles and space equipment including satellites, spacecraft, space stations and extra-terrestrial habitats and vehicles.

The invention relates to the technical field of video communication and in particular provides a device for remotely displaying local computer desktop images through a video conference system. The device comprises a local computer and a conference computer, wherein the conference computer comprises video conference software, a virtual video acquisition card drive module and a network receiving module; and the local computer comprises a desktop image acquisition module and a network sending module. In the device, the traditional video conference system software does not need to be modified, and hardwares such as an RGB (red, green, blue) acquisition card and the like do not need to be increased in the traditional video conference system, thus the fund investment of users and the subsequent hardware maintenance cost are not increased. Moreover, the local computer images are transmitted by adopting network digitization, thereby avoiding the limit of transmission distances and the loss of image quality.

The invention discloses a satellite navigation anti-interference receiving system, and the system consists of an antenna array, an anti-interference receiver, and a high-frequency cable network. The antenna array consists of a passive antenna with the stable phase center. The anti-interference receiver consists of a radio frequency module, an anti-interference receiving module, and a power module. The radio frequency module carries out the signal amplification, filtering and down-conversion, and transmits an intermediate frequency signal to the anti-interference receiving module. The anti-interference receiving module consists of a baseband processing module and a satellite navigation receiving module. The baseband processing module carries out the signal sampling, preprocessing and adaptive space-time filtering processing, and aims at adjusting the directional diagram of the antenna array in real time according to the direction change of an interference signal, and inhibiting the interference signal, so as to improve the interference signal power ratio of a received signal. The anti-interference receiving module directly outputs a single digital intermediate frequency signal to the satellite navigation receiving module, and the satellite navigation receiving module is used for the capturing, tracking and positioning resolving of a satellite navigation signal, and outputting a positioning result to a control system for processing.

The invention discloses an on-line detector of a surge protector, which relates to the application field of detection of surge protectors. The on-line detector mainly comprises a temperature detection unit (1), a signal transformation and transmission unit (2) and a data analysis unit (3). The temperature detection unit (1) detects the temperature of a surge suppressor (4) in a surge protector (6), and the temperature-time curve of the surge suppressor is transmitted to the data analysis unit (3) through the signal transformation and transmission unit (2) and is subject to comparative analysis with the established data model, thereby judging and displaying the type, source and intensity of the surge current and the damaged condition of the surge suppressor (4) as well as whether maintenance and replacement are needed. The data analysis unit (3) can realize remote alarm and network share of detected information through the network.

A package structure having an embedded electronic component includes: a carrier having a cavity penetrating therethrough; a semiconductor chip received in the cavity and having solder bumps disposed thereon; a dielectric layer formed on the carrier and the semiconductor chip so as to encapsulate the solder bumps; a wiring layer formed on the dielectric layer; an insulating protection layer formed on the dielectric layer and the wiring layer; and a solder material formed in the dielectric layer and the insulating protection layer for electrically connecting the wiring layer and the solder bumps, thereby shortening the signal transmission path between the semiconductor chip and the carrier to avoid signal losses.

The invention discloses a water chiller fault diagnosis method based on a hybrid neural network, and aims at the problem that the single BP neural network is difficult to perform accurate prediction of the water chiller and the BP neural network has its own disadvantages. According to the method, a hybrid neural network model RBF-BP based on wavelet transform is put forward to perform fault diagnosis of the water chiller through combination of the characteristic that RBF neural network can approximate any function. The RBF network and the BP network are connected in parallel as one neural network, which is called the RBF-BP implicit strata for short. The algorithm has the advantages of both the RBF network and the BP network. Its learning process converges quickly and avoids the problem that the training process is liable to fall into the local minimum value. The method can be effectively applied to fault diagnosis of the water chiller and improve the performance of fault diagnosis.

A problem that a loss of signal occurs due to switching of a modulation scheme using an adaptive modulation scheme is solved. A radio transmission device (10a, 10b) having an automatic transmission power control function of controlling transmission power of its own station so as to maintain received power of a counter station at a preset constant value and a function of an adaptive modulation scheme for automatically switching over a modulation scheme depending on quality of a radio transmission path includes a modulation scheme determining circuit (14a, 14b) for switching over the modulation scheme by using the adaptive modulation scheme in consideration of a transmission power margin and the received power.

A film transmission line includes a dielectric layer including at least one of a liquid crystal polymer (LCP) structure or a cyclo olefin polymer (COP) structure, and an electrode line on the dielectric layer. A signal loss level (S21) defined of the film transmission line is −1.5 dB or more at a frequency in a range from 20 GHz to 30 GHz. The film transmission line may be applied to a high frequency thin film antenna and an image display device.

In a method and apparatus for recording a magnetic resonance data set of a target region of an object, wherein the target region contains at least one interfering object with a susceptibility difference from the rest of the target region that influences the homogeneity of the basic magnetic field, in particular a metal object and / or an air inclusion, in addition to a first raw data set of the target region recorded without additional dephasing, at least one further raw data set of the target region is recorded that corresponds to a raw-data specific additional dephasing of the spins in the target region. For each image point of the magnetic resonance data set, the maximum value raw data of the corresponding image points of all raw data sets in spatial domain are selected as magnetic resonance data.

The present invention provides embodiments in which induced RF current heating along the length of a medical lead is reduced. Reduction of induced RF current heating in the medical lead is achieved by positioning a conductor about the exterior of an implantable medical device when the device is placed within an MRI environment. In one embodiment, an RF conductor is incorporated within a header assembly for connecting an implantable medical device to at least one conductor lead. The body of the RF conductor is positioned circumferentially around the implantable medical device. In another embodiment, the medical lead is positioned circumferentially around the exterior of the housing of the medical device. A series of clips or a sleeve holds the medical lead or RF conductor in place around the device.

A vehicle restraint having a fixed member such as a frame mounted to a dock face and a hook movable relative to the fixed member for engaging a portion of a vehicle and restraining movement of the vehicle away from the dock. A non-contact sensor is employed to determine engagement of the hook with a portion of the vehicle. The sensor is positioned to provide an effective magnetic field in the zone of contact so that engagement with an ICC bar on the vehicle can be ascertained.

Disclosure is related to a method for sensing fast motion, a controller, and a related electromagnetic sensing apparatus. The method is applicable to a touch panel, in which a fast scan mode is introduced when a fast motion made by an electromagnetic stylus is sensed under a partial scan mode. Therefore, the scan mode is switched to the fast scan mode which is used to acquire coordinates of the stylus according to the electromagnetic signals generated by the stylus. After that, the process goes back to the partial scan mode for continuously sensing the location of the electromagnetic stylus, and determining any fast motion behavior. In one embodiment, in order to obtain the coordinates of the stylus when its moving rate exceeds a threshold, a moving direction may be firstly determined. The one or more sensing loops may be opened in the direction of movement.