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 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
Abstract:
본 발명은 인체를 통신 채널로 이용하는 인체통신 시스템에 관한 것으로, 더욱 상세하게는 인체를 매질로 하는 인체통신에서 다수의 수신장치 혹은 수신전극을 이용하여 수신된 복수의 데이터를 공간다이버시티 획득 관련 시모 기술을 적용하여 수신신호에 대한 오율을 감소시키고 다른 사용자 혹은 다른 전자기기로부터 유기되는 간섭에 대하여 안정적으로 데이터를 송신하기 위한 다수의 수신 전극을 이용한 인체통신 시스템의 수신 장치 및 수신 방법에 관한 것이다. 공간다이버시티, 주파수 선택적 확산 변조, 인체통신
Abstract:
An apparatus and a method for transmitting and receiving a signal having a variable data rate in a human body communication system are provided to process data by using repetitive characteristics of transceiving data by a transmission speed when transmitting data having a variable transmission speed by adopting serial-parallel conversion and frequency selective spreading/dispreading method to data. A header generator(22) generates header information including a transmission speed. A data generator(23) generates transmission data by repeating data, to be transmitted, zero or several times according to the transmission speed. A spreader(27) spreads the transmission data by using a spread code of a desired frequency band. A multiplexer(29) multiplexes the header information and the spread data, and outputs the multiplexed information and data.
Abstract:
본 발명은 저전력 비터비(Viterbi) 복호기 및 역추적 방법을 제공하기 위한 것이다. 본 발명에 따른 비터비 복호기는, 역추적 과정시 역추적 경로가 이전 역추적 경로와 동일한 경우 역추적 동작을 멈추고, 이전 역추적 과정시 저장시켰던 임시 복호 비트를 이용하여 복호하도록 구성한 것이다. 본 발명의 비터비 복호기와 역추적 방법에 따르면, 반복되는 동일한 경로의 역추적 과정을 줄이고 이전 역추적 과정에서의 데이터를 재사용함으로써 전력 소모를 낮출 수 있다. 비터비, 역추적, 저전력