Abstract:
In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
Abstract:
Disclosed is an automatic gain control device in an orthogonal frequency division multiplexing system. A variable gain amplifier controls a gain of an input signal; an energy calculator calculates an energy of the input signal; a truncator accumulates the calculated energies, finds an average thereof, and generates a DC offset of the input signal; a subtracter subtracts a predefined reference value from the DC offset, and outputs a signal; and an RC filter feeds the value output by the subtracter back to the variable gain amplifier so that the value output by the subtracter may be used for an automatic gain control. The predefined reference value given to be 4.Ov is a reference power generated based on a saturation to RMS ratio for minimizing the bit error rate of the orthogonal frequency division multiplexing system.
Abstract:
A display substrate includes a base substrate; a first metal pattern disposed on the base substrate and comprising a first signal line and a first electrode electrically connected to the first signal line; and a buffer pattern disposed at a corner between a sidewall surface of the first metal pattern and the base substrate.
Abstract:
A liquid crystal display (LCD) is provided that includes: a first substrate; a gate line formed on the first substrate; a data line intersecting the gate line to define a pixel; a thin-film transistor (TFT) connected to the gate line and the data line and formed in the pixel; a sustain electrode line including a first sustain electrode that passes through the pixel, so as to divide the pixel into a first region and a transparent second region, and a second sustain electrodes that extend perpendicularly from the first sustain electrode; and a first pixel electrode connected to the TFT, disposed in the first region.
Abstract:
A display substrate includes a base substrate; a first metal pattern disposed on the base substrate and comprising a first signal line and a first electrode electrically connected to the first signal line; and a buffer pattern disposed at a corner between a sidewall surface of the first metal pattern and the base substrate.
Abstract:
Provided is a thin film transistor array panel. The thin film transistor array panel according to exemplary embodiments of the present invention includes: a gate wiring layer disposed on a substrate; an oxide semiconductor layer disposed on the gate wiring layer; and a data wiring layer disposed on the oxide semiconductor layer, in which the data wiring layer includes a main wiring layer including copper and a capping layer disposed on the main wiring layer and including a copper alloy.
Abstract:
A lenticular unit includes a transparent substrate; first electrodes being transparent and disposed on the substrate; a second electrode being transparent and elastic; and a transparent material layer interposed between the first and second electrodes and being deformable in a lens shape in a thickness direction depending on a potential applied between the first and second electrodes.
Abstract:
There are provided a wireless communication system for providing diversity gains for multicast services and a method of providing a multicast service. According to the wireless communication system, by transmitting, when terminals are partially distributed in each cell, data to areas where no user exists so as to reduce interference between other MBS (Multicast Broadcast System) zones and other cells that transmit only unicast services, performance deterioration may be minimized.
Abstract:
In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.
Abstract:
Provided is a method for manufacturing a film structure.The method for manufacturing the film structure n includes forming a layer of a precursor material on a substrate, preheating the precursor material, and irradiating the precursor material with microwave radiation to form the film structure.