Abstract:
PURPOSE: A communication device which uses a synchronized clock signal is provided to supply various services by using a data transmission characteristic at high speed. CONSTITUTION: An interface unit(120) transmits a communication signal. The interface unit receives a communication signal from the outside. A communication signal analyzing unit(130) analyzes the received communication signal. A clock signal providing unit(140) supplies a clock signal to the communication signal analyzing unit, the interface unit, and a communication signal generating unit. A controlling unit(150) controls the communication signal generating unit, the interface unit, and the communication signal analyzing unit.
Abstract:
PURPOSE: A device and a method for generating a preamble for a digital direct transmission system are provided to prevent a low frequency noise by generating the preamble through the combination of a diffusion coding, a pseudo noise code, and a line coding. CONSTITUTION: A preamble generating device(200) includes a PN(Pseudo Noise) code generating unit(210), a line coder(220), and a diffusion coder(230). The PN code generating unit generates a PN code. The PN code generating unit is comprised of an existing maximal code, a nonmaximal code, a gold code, or a kasami code generator. The line coder receives a PN code generated by the PN code generating unit. The line coder line-codes the PN code. The diffusion coder receives the PN code which is line-coded by the line coder. The diffusion coder performs the diffusion coding according to a walsh coding method.
Abstract:
PURPOSE: It frequency-selectives the adaptive using the orthogonal code, by using the denotation carrying orthogonally the base band communications method minimizes interference between the sending code. CONSTITUTION: By using one denotation among a plurality of denotations having the different frequency band communications operates(S301). The proper party house is selected by using the correlation value of an plurality of denotations included in the transmitted test data as described above(S305).
Abstract:
There is provided a human body communication method and system using a frequency-selective baseband in order to transmit and receive data between communication devices that are coupled to a human body by using the human body as a communication channel. The human body communication method and system may be useful to maximize an efficiency of the frequency-selective spreading technology to enhance a processing gain of the Walsh code technology, and thus to reduce the interference between human bodies of users by adaptively selecting a frequency band of Walsh codes that are used for data communications according to the human body channel characteristics and the noise environments that are varied according to the ambient environments, and also construct a low-power and stable human body communication when there is a strong interference induced from other electronic equipments.
Abstract:
PURPOSE: A motion contents based learning apparatus and a method thereof for maximizing the learning effect for maximizing the learning effect of the user are provided to present about a posture and motion which order should be for learning the motion. CONSTITUTION: A motion contents based learning apparatus includes a plurality of motion sensing sensors, a motion controller(20), and a plurality of motion correction sensors. The motion detection sensor is arranged to the body of a user with dispersion. The motion detection sensor obtains the position information signal toward the body part of a user. The motion control unit understands the user motion it analyzes the position information signal. The motion control unit produces the motion calibration signal in which it induces the motion correction and compares with the standards motion in which it provides the user motion in the motion contents.
Abstract:
A modulator/demodulator using a baseband and a transmission/reception apparatus using the same without interference are provided to increase transmission data rate efficiently and improve a processing gain in an entire system. A spreader(218) in which a transfer data rate is improved includes an N bit counter, M bit data input bit, and a subtracter(2182). N bit counter outputs N bit input data. The subtracter selects the frequency band in which (N-M) bit frequency selection control bit and offset input bit are input and desiring. The logical multiplier of N is the output of N bit counter. The output bit of the first device operates sum of logic of (N-M) beat frequency selection control bit and (N-1) first logic multiplier. The second device for operating sum of logic performs an OR operation the output of the logical multiplier of N.
Abstract:
A method for selecting the frequency baseband of a Walsh code, an adaptive frequency selective spreader and a transceiver using the same are provided to obtain the processing gain of the Walsh code technique efficiently. A counter(2171) outputs a counter bit. An adaptive frequency baseband selector(2172) selects a desired frequency band by receiving a data bit, a frequency selecting control bit and an offset input bit. A gray indexing unit(2173) gray-indexes a frequency selecting control bit and a data bit. A logical operating unit(2179) performs the logical operation for the counter bit and output bits of the gray indexing unit.
Abstract:
본 발명은 전자회로 설계 기술에 관한 것으로, 특히 전하 펌프에 관한 것이며, 더 자세히는 고전압(4VDD)용 CMOS 전하 펌프에 관한 것이다. 본 발명은 회로 면적을 줄일 수 있는 고전압용 CMOS 전하 펌프를 제공하는데 그 목적이 있다. 종래의 고전압 CMOS 전하 펌프는 n개의 딕슨 전하 펌프를 캐스케이드 방식으로 연결하고, 각 딕슨 전하 펌프 사이에 레벨 쉬프터를 삽입하여 다음 단의 전하 펌프의 입력 클럭 신호를 생성해내는 방식을 사용하였다. 반면, 본 발명에서는 캐스케이드된 전하 펌프와 레벨 쉬프터 회로를 통합시킴으로써 불필요거나 중복으로 사용되는 회로의 제거를 통하여 사용되는 MOS 트랜지스터의 수를 최소화하였다. 씨모스, 딕슨 전하 펌프, 캐스케이드, 레벨 쉬프터, 면적
Abstract:
본 발명은 전자회로 설계 기술에 관한 것으로, 특히 전하 펌프에 관한 것이며, 더 자세히는 고전압(4VDD)용 CMOS 전하 펌프에 관한 것이다. 본 발명은 회로 면적을 줄일 수 있는 고전압용 CMOS 전하 펌프를 제공하는데 그 목적이 있다. 종래의 고전압 CMOS 전하 펌프는 n개의 딕슨 전하 펌프를 캐스케이드 방식으로 연결하고, 각 딕슨 전하 펌프 사이에 레벨 쉬프터를 삽입하여 다음 단의 전하 펌프의 입력 클럭 신호를 생성해내는 방식을 사용하였다. 반면, 본 발명에서는 캐스케이드된 전하 펌프와 레벨 쉬프터 회로를 통합시킴으로써 불필요거나 중복으로 사용되는 회로의 제거를 통하여 사용되는 MOS 트랜지스터의 수를 최소화하였다. 씨모스, 딕슨 전하 펌프, 캐스케이드, 레벨 쉬프터, 면적
Abstract:
본 발명은 클록 및 데이터 복원 (CDR: Clock Recovory and Data Retiming) 회로를 이용하여 TDD 방식 통신 장치의 송신 및 수신시의 동작 클록 신호를 제공함으로써, 크리스탈 오실레이터없이 동작 안정화를 구현하고 전력 소모량을 감소시킬 수 있는 TDD 방식 통신 장치 및 그의 동작 방법에 관한 것으로서, 송신 시간 구간에서는 상기 CDR 회로에서 발생된 기준 주파수의 클록 신호를 이용하여 송신 프레임의 처리를 수행하며, 수신 시간 구간에서는 상기 CDR 회로에 의해 수신 프레임으로부터 복원된 클록 신호에 의해 상기 수신 프레임을 처리하도록 구현된다. 클록 및 데이터 복원 (CDR: Clock Recovory and Data Retiming), TDD (Time Division Duplexer), 인체 통신, 록 타임 (Lock time) 구간