Patent application number | Description | Published |
20130210294 | Underwater Robot Based on Flapping - Disclosed is an underwater robot based on flapping comprising: an actuator including a smart material and directional material, wherein the smart material is changed in its shape according to an external signal, and the directional material restricts a deformation in a specific direction; a body connected with the actuator; and a controller which makes the actuator perform a first stroke in a direction, and a second stroke in another direction being different from that of the first stroke; wherein the actuator performs at least one deformation of bending and twisting according to position of the smart material and directionality of the directional material, and furthermore enables to simultaneously perform the smooth bending and twisting motion with the simple structure by adjusting the position of the smart material functioning as the active component, and the directionality of the directional material functioning as the passive component. | 08-15-2013 |
20130344874 | LOAD MANAGEMENT - The disclosure is related to adaptive load management in a femtocell network. A load state of a femtocell base station may be determined as one of a low load state, a middle load state, and a high load state. According to the determined load state, a reserved service capacity and an available service capacity of the femtocell base station may be adaptive controlled. Furthermore, at least one handover trigger condition associated with the femtocell base station may be controlled according to the determined load state of the femtocell base station. | 12-26-2013 |
20150154913 | Organic Light Emitting Display Device and Method for Driving the Same - An organic light emitting display device comprising a display panel and a panel driver is disclosed. The display panel includes pixels and sensing lines respectively coupled to the pixels. Each pixel includes an organic light emitting device and a driving transistor to control a current flow in the organic light emitting device. The panel driver is configured to receive an input image data, to generate a sensing data by sensing a characteristic variation of the driving transistor, to generate a peak luminance data to limit peak luminance of an input image, to generate a corrected data by correcting the input image data based on the sensing data, to convert the corrected data to a data voltage based on a plurality of reference gamma voltages set based on the peak luminance data, and to supply the data voltage to the pixels. | 06-04-2015 |
Patent application number | Description | Published |
20090154619 | FREQUENCY ERROR ESTIMATOR USING SECOND-ORDER LOOP FILTER AND OPERATING METHOD OF THE FREQUENCY ERROR ESTIMATOR - A frequency error estimator and an operating method of the frequency error estimator are provided. In the frequency error estimator and the operating method of the frequency error estimator, a frequency error between a transmitter and a receiver of a mobile communication system using a reference code is calculated, thereby improving the precision of estimation while reflecting variations in frequency over time. | 06-18-2009 |
20090316848 | APPARATUS FOR GENERATING CLOCK SIGNAL WITH JITTER AND TEST APPARATUS INCLUDING THE SAME - The present invention relates to an apparatus for generating a clock signal with jitter and a test apparatus including the same. The apparatus for generating a clock signal with jitter in accordance with the present invention includes a voltage-controlled crystal oscillator (VCXO) for generating an output signal including jitter components based on a driving power source having a specific waveform and a controlled voltage, a phase comparator for calculating a phase difference of a reference signal and the output signal, and a loop filter for generating the controlled voltage based on the phase difference calculated by the phase comparator. Accordingly, the PLL circuit unit generates a clock signal including jitter, so that the complexity and manufacturing cost of the apparatus can be reduced. | 12-24-2009 |
20100156690 | DIGITAL DIRECT CONVERSION RECEIVING APPARATUS AND METHOD - A digital direct conversion receiving apparatus, including: a phase conversion unit to down-convert a Radio Frequency (RF) signal into a plurality of sample signals, and generate a certain phase difference among the plurality of sample signals when the RF signal is down-converted; and a variable complex gain unit to remove an image component from the plurality of sample signals using the generated phase difference. | 06-24-2010 |
20100158172 | DIGITAL DIRECT CONVERSION RECEIVER BASED ON VARIABLE DELAY AND CONSTANT INTERPOLANT FOR RECEIVING RADIO FREQUENCY SIGNAL AND METHOD THEREOF - Disclosed is a digital direct conversion receiver including a clock generation and a distribution unit to generate a clock signal having a time difference that generates a predetermined phase difference, a Track & Holder (T&H) to perform sampling of a radio frequency (RF) signal selected by a tunable RF filter with a selected sampling frequency and down converting of the sampled signal, and to generate the predetermined phase difference between sampled signals by using the clock signal having the time difference during the down-conversion, an analog-digital (AD) converter to generate a sample stream having phase difference information from the down-converted sampled signal, and a complex interpolant to eliminate an image component from the sample stream using a phase difference between a plurality of sample streams. | 06-24-2010 |
20100330949 | BPS RECEIVER - The present invention receives simultaneously RF signal of different frequency band and processes the RF signal received, at this time a BPS receiver minimizes aliasing generated by RF signal. The present invention comprises a sampling process unit which samples a signal summing a first RF signal and a second RF signal of different frequency bands with time gap, a quantization process unit which generates a first stream signal and a second stream signal, a digital signal down-converted through respective time information in the signal summing the first RF signal and the second RF signal and a signal process unit which performs FIR filtering with reference to phase shift for a respect frequency band of the first stream signal and the second stream signal, separates the first RF signal and the second RF signal based on a result of the performance. | 12-30-2010 |
20110051869 | RECEIVING APPARATUS AND RECEIVING METHOD - A receiving apparatus includes: RF filters for selecting and outputting a signal to be down-converted from among a plurality of received signals having different bands; a phase conversion unit for generating a phase difference between output signals of the filters and down-converting the output signals of the filters to output a plurality of sample signals; a quantization unit for converting the plurality of sample signals from discrete signals into digital signals; and a signal separation unit for separating and outputting each of a plurality of output signals corresponding to the plurality of received signals from the output signals of the quantization unit by using a phase shift value caused by the phase difference. | 03-03-2011 |
20110092174 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SIGNAL - A signal transmitting apparatus includes a signal distributor, a frequency converter, and a frequency synthesizer. The signal distributor is configured to baseband signals corresponding respectively to a plurality of frequency band. The frequency converter is configured to convert each of the distributed baseband signals into one of a positive frequency signal and a negative frequency signal according to the frequency band. The frequency synthesizer is configured to synthesize the positive frequency signal and the negative frequency signal to generate a transmission signal. Herein, the positive frequency signal and the negative frequency signal are signals included in one predetermined intermediate frequency band. | 04-21-2011 |
20120039417 | BAND PASS SAMPLING RECEIVER - Provided is a band pass sampling receiver which performs a sampling operation to a combined signal of RF signals of different frequency bands. The band pass sampling receiver performs the sampling operation by applying a sampling rate having a time lag to a combined signal of first and second RF signals of different frequency bands. And, by using a result of the sampling operation and first and second interpolant functions, the first and second RF signals are separated from each other. Herein, the first and second interpolant functions are determined based on the time lag, the sampling rate and frequency bands of the first and second RF signals. | 02-16-2012 |
20120076249 | APPARATUS AND METHOD FOR RECEIVING DUAL BAND RF SIGNALS SIMULTANEOUSLY - Disclosed is a dual band receiver which includes an analog-to-digital converter configured to convert a dual band analog RF signal into a dual baseband digital signal; and a first signal extractor configured to generate a first path signal and a second path signal from the dual baseband signal and to extract a first baseband signal using a relative sample delay difference between the first and second path signals, wherein the dual baseband signal includes the first baseband signal and a second baseband signal, the first path signal is a signal obtained by sample delay of the dual baseband signal and then down sampling of a resultant signal, and the second path signal is a signal obtained by down sampling of the dual baseband signal without sample delay. | 03-29-2012 |
20140119485 | APPARATUS AND METHOD FOR RECEIVING DUAL BAND RF SIGNALS SIMULTANEOUSLY - Disclosed is a dual band receiver which includes an analog-to-digital converter configured to convert a dual band analog RF signal into a dual baseband digital signal; and a first signal extractor configured to generate a first path signal and a second path signal from the dual baseband signal and to extract a first baseband signal using a relative sample delay difference between the first and second path signals, wherein the dual baseband signal includes the first baseband signal and a second baseband signal, the first path signal is a signal obtained by sample delay of the dual baseband signal and then down sampling of a resultant signal, and the second path signal is a signal obtained by down sampling of the dual baseband signal without sample delay. | 05-01-2014 |
20140314165 | METHOD FOR IDENTIFYING OFDM COMMUNICATION SIGNAL USING OFDM SYMBOL ESTIMATION - A method provides an identifying OFDM communication signal using OFDM symbol estimation. In view of the above, the present invention provides an apparatus and method for identifying an OFDM communication signal using an OFDM symbol estimation, which is capable of analyzing the OFDM signal with a high accuracy in a cognitive radio technique, thereby identifying the OFDM signal from a heterogeneous communication signal. | 10-23-2014 |