Abstract:
A human body communication system and a method are provided to communicate a wireless internal capsule to an external recording device at high speed with a little power consumption, thereby replacing a conventional RF method. A human body communication system and a method include a wireless capsule(100) and a portable data recorder(200). The wireless capsule is located inside a human body to obtain internal image information and to transmit the obtained internal image information to the outside. The portable data recorder is in communication with the wireless capsule. The portable data recorder receives signals transmitted from the wireless capsule and stores the received signals through a wireless data process.
Abstract:
A TDD(Time Division Duplex) mode communications device and an operation method for stabilizing clock without a crystal oscillator are provided to generate the operation clock of receiver and transmission unit by penuriously using a CDR circuit used for clock and reconstitution of data of the receive frame. An analog front end unit(21) receives a receive frame from outside and outputs transmission frame. An analog front end restores the clock and data of the received signal through CDR(Clock Recovery Data Retiming). A transmission unit(22) is operated by using the clock signal of the reference frequency generated in CDR for the transmission time interval. The transmission unit generates the transmission frame. A receiver(23) is operated by using the clock signal restored by CDR from the receive frame for the receive timing section. The receiver processes data restored in the analog front end.
Abstract:
A receiver and a receiving method for a human body communication system are provided to transmit data stably without the reduction of a transmission speed by reducing distortion of a channel and a noise of a signal. A human body communication transceiver includes a human body communication MAC(31), a human body communication physical layer modem(32) and a transmission signal electrode(330). A human body communication receiving device includes a plurality of receiving signal electrodes(333,335,337), and a human body communication AFEs(332,334,336) connected to the plurality of received signal electrodes(333,335,337), and a receiving unit. The human body communication MAC is composed of a MAX transmitting processor(311) and a MAX receiving processor(312). A transmission unit(321) in the human body communication physical layer modem is composed of a data generator(3210) and a frequency selective diffusion modulator(3211). The signal transmitted through the transmitting signal electrode is delivered through the human body channel. The receiving signal electrode attached to the human body receives the signal delivered through the human body channel. The signal received through the plurality of receiving signal electrodes includes the equal data. If the plurality of receiving signal electrodes are used, the electrode direction of the receiving signal attached to the human body is varied.
Abstract:
A method for modulation and demodulation capable of improving transmitted-data rate using frequency selective baseband and apparatus thereof are provided to reduce energy consumption about a data transmission by using a limited frequency band. A method for modulation and demodulation capable of improving transmitted-data rate using frequency selective baseband comprises the following steps: a step for generating a plurality of sub groups by dividing a total spreading code of 2N(N is real number) used for a spread spectrum into a number unit of 2M(M
Abstract:
A human body contact control apparatus is provided to automatically control whether to make a ground electrode come in contact with human body according to human body contact locations(for example, wrist and the fingertips) of a system. A human body contact control apparatus comprises the followings: a resistance measuring means(402) for applying predetermined voltage in the human body through a signal electrode and measuring the resistance value between the ground electrode and the signal electrode; a contact control means(401) for providing a human body contact controlling signal after determining whether to make a ground electrode come in contact with the human body by using the measured resistance value; and a contact performing means for making the ground electrode come in contact with the human body according to the human body contact controlling signal.
Abstract:
A digital communication system using a frequency selective baseband and a method thereof are provided to reduce the complexity of analog transmitting/receiving terminals using the serial/parallel conversion of data and a frequency selective diffusion code, thereby improving the power consumption of the entire system. A transmitter(221) in a digital communication system comprises a preamble/header transmitting unit(2210,2211,2212,2213), a data transmitting unit(2214,2215,2216,2217), and a multiplexing unit(2218). The preamble/header transmitting unit diffuses header information comprised of a preamble for frame synchronization and data property information. The data transmitting unit diffuses data to be transmitted to the outside using a frequency selective diffusion code. The multiplexing unit performs the multiplexing of the preamble and header diffused by the preamble/header transmitting unit, and data diffused selectively according to a frequency in the data transmitting unit and transmits the diffused preamble, header and data which are converted into digital signals.
Abstract:
A portable DMB(Digital Multimedia Broadcasting) apparatus for human body communication, a method thereof, an HMD(Head Mounted Display) apparatus for DMB reception using human body communication, and a method thereof are provided to enable a user, who carries a portable terrestrial DMB receiver, to conveniently watch a terrestrial DMB program by using his body as a transport channel, without an additional cable or antenna. A portable DMB apparatus for human body communication comprises a DMB receiver(101) and a transmitting electrode(206). The DMB receiver(101) receives and processes DMB signals and converts them into audio/video signals. Also the DMB receiver(101) conveys IF-band broadcast signals or transport streams, which are created in the process of receiving and processing the DMB signals, to the transmitting electrode(206). The transmitting electrode(206) supplies the IF-band broadcast signals or the transport streams to a user's body as DMB signals for human body communication. In addition, the portable DMB apparatus comprises an output part(205). The output part(205) outputs the audio/video signals.
Abstract:
본 발명은 스마트 안테나 기지국 변조 장치에 관한 것이다. 스마트 안테나 기지국 시스템은 기존 기지국 시스템에 비하여 많은 가입자를 수용 및 통신 품질을 증가시킬 수 있는 점 등 많은 장점들을 가지지만, 기존 기지국 시스템에 비하여 여러 안테나를 사용함에 따르는 기지국 송/수신 부분의 복잡도 증가 문제와 기존 기지국과의 호환성 문제 등을 가진다. 본 발명에서는 이러한 스마트 안테나 시스템이 가지는 문제점을 해결하기 위하여 시분할 다중화 기법을 사용한 변조기 사용 및 섹터 빔 선택기와 TX 빔형성기를 사용 함으로써 다양한 섹터와 안테나 수에서도 쉽게 유연성 가지고 적용할 수 있는 스마트 안테나 기지국 변조 장치를 제공한다.
Abstract:
PURPOSE: A normalization apparatus is provided to reduce the size of hardware for system configuration and improve a real time processing speed. CONSTITUTION: A normalization apparatus comprises a multiplying unit for carrying out a multiplying operation required in a normalization process; a dividing unit for carrying out a dividing operation required in a normalization process through a binary log and subtracting operation; and a multiplexer(210) for synchronizing the signals received from a smart antenna receiver with a predetermined clock, and outputting the signals to the multiplying unit. The multiplying unit includes a binary log generator(220) for converting the signals input from the multiplexer into a binary log value and outputting the binary log value; a shift left(240) for outputting the output of the binary log generator into a double size; and a binary inverse log generator(250) for converting the output of the shift left into a binary inverse log value and outputting the binary inverse log value. The dividing unit includes a NORM binary log generator(270) for converting the NORM function value output from an adder into a binary log value and outputting the binary log value; a subtractor for subtracting the output of the NORM binary log generator from the output of a shift register(230); and a NORM binary inverse log generator(290) for converting the output of the subtractor into a binary inverse log value and outputting the binary inverse log value.
Abstract:
In an apparatus for a TFCI mapping in a wireless communication mobile station, and a method thereof, the apparatus includes an encoding unit for encoding a TFCI transmitted from a main control unit as a CPU; a TFCI mapping unit for generating necessary control parameter and a TFCI code by using a signal encoded by the encoding unit and a signal transmitted from the CPU; and a CPU for controlling the encoding unit and the mapping unit.