摘要:
Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station.
摘要:
An image output apparatus and a control method thereof are provided. The control method of the image output apparatus adjusts and outputs an image according to an input position of the image output apparatus. Therefore, when a single image is displayed using a plurality of image output apparatuses, the size or resolution of an output image is automatically adjusted based on the input number and position of image output apparatuses, and thus user's convenience is improved.
摘要:
A plasma display device and a method of driving the same according to the black load of a displayed image. The plasma display device includes a plurality of first electrodes and a plurality of second electrodes extending in parallel, a plurality of pixels each having a plurality of discharge cells defined by the first and the second electrodes, a driver adapted to apply a first reset waveform to the first electrodes and a second reset waveform to the second electrodes during a reset period, and a controller adapted to adjust at least one of a voltage of the first reset waveform or a voltage of the second reset waveform in accordance with a black load of an image signal corresponding to the plurality of pixels.
摘要:
This invention is related to the calibration apparatus and method for compensating the phase characteristics in the receiving and transmitting signal paths of array antenna system, especially adaptive array antenna system operating as the base station system. The objective of this invention is to provide the calibration apparatus and method for the array antenna system to be able to compensate its phase differences or irregularities without any restrictions on the array structure or position of additional antenna or antenna toplogies while the array antenna system is in its operational mode such that the signals used by the subscribers are received or transmitted together with the signals used for the calibration. In this invention the phase delay between the additional antenna element and each of the antenna elements of the array antenna system is measured in advance of the calibration procedure to be used when the phase differences or irregularities are measured during the calibration procedure. The test signals used for the calibration is distinguishable from the signals used by the subscribers. Furthermore, each of the transmitting calibration signals itself is distinguishable from one another when the plural transmitting signal paths are to be calibrated simultaneously.
摘要:
A signal processing apparatus for minimizing interference and for reducing effects of noise by controlling beam patterns of a telecommunication system having an array antenna, comprising: a means for computing a residue vector, by using a signal vector provided from said array antenna at each snapshot, a final array output signal of said telecommunication system at the last previous snapshot and a value of a gain vector of the present snapshot, and for outputting said residue vector; a means for synthesizing a scalar value, which is needed to generate a search direction vector, from said residue vector; a means for producing said search direction vector, by using said residue vector and said scalar value; a means for producing an adaptive gain, by using said signal vector, said search direction vector, said final array output signal of said telecommunication system at the last previous snapshot and the value of said gain vector of the present snapshot; and a means for updating said gain vector, by using said search direction vector and said adaptive gain at the present snapshot.
摘要:
Disclosed is a smart antenna software definition radio terminal device. A software definition radio terminal device in a smart antenna software definition radio multi antenna system according to the present invention includes: a storage unit, a microprocessor, and at least one baseband accelerator. The microprocessor is configured to select a smart antenna algorithm; receive a control command from a radio controller layer for delivering a control command to control the baseband accelerator and a radio controller layer on the basis of the selected algorithm; read from the storage unit a code including a baseband driver layer that delivers the received control command to the baseband accelerator, and execute the read code; and load at least one functional block for realizing at least one smart antenna algorithm from the storage unit into the baseband accelerator. According to the terminal device, a terminal having a modem chip of a different structure may execute the same radio application through standard API.
摘要:
The present invention relates to a multi-antenna subsystem for a SDR (software defined radio) capable of supporting a multi-antenna technique to an antenna system using a multi-antenna subsystem. The multi-antenna subsystem of a multi-antenna system includes an algorithm executing unit for carrying out an algorithm for a multi-antenna technique to be required in the multi-antenna system, a frame synchronization unit for a synchronization acquisition, and a control unit for controlling the algorithm executing unit and the frame synchronization. The algorithm executing unit has a plurality of functional blocks and the functional block has state information, which can be referred by other functional blocks, for supporting SDR system.
摘要:
There is provided a receiver for processing a ranging channel. The receiver includes a Fourier transformer for transforming a received signal into a frequency domain signal, a ranging channel extraction and ranging code elimination unit for extracting a ranging channel from the frequency domain signal, and eliminating a code of a ranging code from the ranging channel and a ranging channel processor for estimating transmission delay or transmission power from a time domain signal. By estimating transmission delay and/or transmission power in a time domain, it is possible to rapidly and accurately adjust the transmission delay and transmission power intensity in the ranging procedure.
摘要:
In a plasma display device and a driving method thereof, a switch for applying a voltage rising waveform to a scan electrode during an idle period and a first period is coupled between the scan electrode and a power source. The switch applies the voltage rising waveform having a first slope by being repeatedly turned on/off according to a first control signal during the idle period, and/or the switch applies the voltage rising waveform having a second slope (having a higher gradient than the first slope) by being repeatedly turned on/off according to a second control signal during the first period. As such, the scan electrode voltage is increased with the first slope during the idle period to perform a more stable reset operation. Also, when the idle period does not exist, the voltage of the scan electrode is increased within the first period to enable a normal reset operation.
摘要:
A signal processing method is for use in an array antenna system included in a Code Division Access (CDMA) mobile telecommunications network base station. The signal processing method includes initializing a weight vector and a snapshot index; obtaining a gradient of output power of an array antenna to a phase of each of the antennas in the array antenna system at every snapshot and determining whether an adaptive gain is added or subtracted depending on the signature of the gradient to update the phase of each antenna; and determining a weight value for each of the antennas to apply the weight value to a signal received at the corresponding one of the antennas.