Abstract:
다양한 주행 조건에서 발생하는 주행 불가능 상태를 탈출할 수 있도록 개선된 구동 유닛을 가지는 청소 로봇을 개시한다. 청소 로봇은 본체와, 본체를 구동하는 구동유닛을 포함한다. 구동유닛은 구동력을 생성하는 제1구동모터 및 제2구동모터와, 제1구동모터로부터 구동력을 전달받아 회전하는 구동 휠과, 구동 휠을 회전 가능하게 지지하고, 제1구동모터의 모터축을 중심으로 제1위치와 제2위치 사이에서 회전 가능한 휠 프레임을 포함한다. 휠 프레임은 제1위치와 제2위치 사이의 적어도 일부 구간에서 제2구동모터로부터 구동력을 전달받아 회전한다.
Abstract:
Disclosed are a method for estimating a deterioration state of a memory device, which estimates threshold voltage distributions using data read from the memory device and determines a deterioration state of the memory device, and a wear leveling method of the memory system using the same. The method for estimating a deterioration state of a memory device comprises the steps of: reading data from selected word lines of a memory cell array by applying, to the selected word line, a plurality of read voltages having values corresponding to at least one valley of threshold voltage distributions of the selected memory cells; generating quality estimation information indicating states of the threshold voltage distributions using the data read from the selected memory cells; and determining a deterioration state of a storage area including the selected word lines based on the generated quality estimation information.
Abstract:
본 발명은 통신 시스템에서 송신기에 있어서, 인터리빙 방식을 사용하여 저밀도 패리티 검사(Low Density Parity Check: LDPC) 부호어에 포함되어 있는 LDPC 부호어 비트들을 인터리빙하고, 상기 인터리빙된 LDPC 부호어 비트들을 변조 방식을 사용하여 생성될 변조 심볼의 사이즈 단위로 출력하는 인터리버와, 여기서 상기 변조 심볼은 상기 변조 심볼에 포함되는 변조 심볼-구성 비트들간의 신뢰도 특성들에서 차이를 가지며, 상기 LDPC 부호어 비트들은 높은-차수로부터 순차적으로 정렬되고, 매핑 방식을 사용하여 상기 인터리빙된 LDPC 부호어 비트들을 상기 변조 심볼-구성 비트들로 매핑하는 비트 매핑기를 포함하고, 상기 매핑 방식은 상기 인터리빙된 LDPC 부호어 비트들의 차수들과 상기 변조 심벌-구성 비트들의 신뢰도 특성들을 고려하고, 상기 인터리빙된 LDPC 부호어 비트들의 차수들은 상기 인터리빙된 LDPC 부호어 비트들에 일대일로 매핑되는 변수 노드들의 차수들이고, 상기 매핑 방식은 상기 인터리빙된 LDPC 부호어 비트들 중 2개의 가장 높은 차수 비트들을 상기 변조 심벌-구성 비트들 중 2개의 가장 낮은 신뢰도 비트들에 매핑하는 것을 반복함을 특징으로 한다. 저밀도 패리티 검사(LDPC) 부호, 고차 변조, 신호 성좌 비트 매핑, 인터리빙
Abstract:
PURPOSE: A robot cleaner and a controlling method thereof are provided to reduce a duplicated cleaning area or a non-cleaning area by cleaning with moving along a driving path inside a reset cleaning area. CONSTITUTION: A robot cleaner comprises an input unit(100) and a control unit(160). The input unit receives a command for a cleaning mode. The control unit defines a plurality of cleaning areas based on the position of the robot cleaner when a first cleaning mode is selected. The control unit performs cleaning in order to clean each defined area. The control unit re-defines a cleaning area or a cleaning direction which belongs to the robot cleaner along a detected standard wall surface. The control unit drives along a predetermined driving path in re-defined cleaning area and performs the cleaning. [Reference numerals] (100) Input unit; (110) Photographing unit; (120) Positioning unit; (130) Feature map generating unit; (140) Obstacle sensing unit; (150) Path map generating unit; (160) Control unit; (170) Storage unit
Abstract:
PURPOSE: A method for estimating joint sequence between modules of a modular robot is provided to control a robot joint without previous knowledge about a coupling structure. CONSTITUTION: A method for estimating joint sequence between modules of a modular robot comprises following steps. Each joint arranged in a plurality of modules moves in order. Torque applied to a plurality of the joints is measured while a plurality of the joints moves. The index of a device is arranged according to the measured torque. A joint sequence in between a plurality of the modules is estimated by comparing the arranged index of the device.
Abstract:
PURPOSE: A robot cleaner is provided to prevent an electric wire from being caught in wheels by discharging the electric wire to the outside along a guide member. CONSTITUTION: A robot cleaner comprises a main body(10), wheels(20), and guide members(30). The main body performs cleaning. The wheels are installed on the bottom of the main body and move the main body. The guide members are arranged to be adjacent to the wheels and guide foreign materials caught in the wheels to the outside.
Abstract:
An apparatus and a method for detecting a signal in a communication system using multiple antennas are provided to successfully remove interference in other branches even though removing interference is failed in one branch, thereby improving the entire performance. A signal sequence that a user wants to detect is determined in consideration of a channel state. A signal is detected according to the determined signal sequence(102). And a final detection signal is regarded as a first detection signal, a signal is reversely detected(104,106). A signal is detected in a sequence reverse to the determined signal sequence(112). And the final detection signal is regarded as the first detection signal, a signal is reversed detected(114,116). The final detection signal is detected by comparing a noise variance value of the detection signal(120,122,124).
Abstract:
A method for transmitting and receiving signal is provided to minimize the size of an encoder and a decoder by supporting various encoding rates using just one parity check matrix. A method for transmitting and receiving signal comprising: generating a children parity check matrix by predetermined encoding rate; generating a parity for generating a parent parity check matrix based on the children parity check matrix; generating an additional parity using the parity and an information vector; inputting the information vector, and using the parent parity check matrix by the children parity check matrix and the additional parity; and modulating the information vector as a block LDPC(Low Density Parity Check) codeword using the parent parity check matrix, and transmitting the block LDPC(Low Density Parity Check) codeword which is punched in a preset mode.