Abstract:
PURPOSE: A sensor node including a general-purpose interface port with a plug and play, sensor board including a general-purpose interface port with a sensor device driver, general-purpose interface port and each method thereof are provided to enable a control unit to automatically recognize and control a sensor unit through a universal interface port. CONSTITUTION: A universal interface port(240) offers an interface with a sensor board. The universal interface port downloads a sensor device driver from a connected sensor board. A controller(210) controls the sensor board by using the downloaded sensor device driver. The controller processes sensing data which is generated by a senor included in the sensor board. The universal interface port download a sensor device driver which is related with at least one among SPI(Serial Peripheral Interface), I2C(Inter-Integrated Circuit), ADC(Analog to Digital Converter), Interrupt, and frequency.
Abstract:
PURPOSE: A constant amplitude encoding apparatus and a method for a code division multiple communication system are provided to obtain excellent flexibility by excluding a method of using a orthogonal code from an encoding module. CONSTITUTION: An encoding module(110) successively performs horizontal encoding and vertical encoding of an input signal. A diffusion and multiplex module(120) diffuse the result of the encoding module. The diffusion and multiplex module output the final output data row of the constant amplitude by performing vertical multiplexing. The encoding module comprises a horizontal encoding unit(111) and a vertical encoding unit(112) and performs horizontal encoding and vertical encoding of the input signal according to TPC(Turbo Product Code) encoding method.
Abstract:
PURPOSE: A constant amplitude encoding method for a code division multiplex communication system are provided to produce various diffusion gains and transmission rates by generating a constant amplitude signal instead of a multi amplitude signal. CONSTITUTION: The n bit code equal to an input signal is generated to encode a constant amplitude of a transmission signal(S10). The generated n bit code is diffused by applying an orthogonal codeword set(S20). The additional information is added to show the output characteristic of the constant amplitude(S30). The orthogonal codeword set structure is generated by using a walsh-hadamard matrix.
Abstract:
PURPOSE: A short distance wireless transceiver capable of using multiband is provided to normally transmit and receive the multiband signal with sliming size of the wireless transceiver by applying a common antenna capable of transmitting and receiving the multiband signal. CONSTITUTION: An antenna(100) transmits and receives the wireless communication signal of multiband. An RF signal preprocess unit(110) passes through only the signal of the selection band, processes the radio frequency signal received according to the transceiver path set and RF processes the signal to be transmitted. A modulator/demodulator unit(120) modulates/demodulates a transmitted/received signal according to modulation/demodulation method for the short distance wireless communication. A baseband processing unit(130) processes the signal of multiband into bandwidth baseband signal.
Abstract:
수신된 광신호의 소광비 특성을 고려한 버스트 모드 광 수신장치가 개시된다. 본 발명에 따른 버스트 모드 광 수신장치는 외부로부터 소정의 소광비 및 버스트 특성을 갖는 광 신호를 수신하여 전류 신호로 변환하는 포토 다이오드, 포토 다이오드에 의해 전류 변환된 신호를 전압 신호로 변환하며, 전압 변환된 신호를 증폭하여 출력하는 전치 증폭기, 제어신호의 따라 제어되는 소정의 DC 전압을 기준으로, 전치 증폭기에서 증폭된 신호의 탑 피크 전압과 바텀 피크 전압을 검출하고, 검출된 탑 피크 전압과 바텀 피크 전압의 중간 값을 제1기준 전압으로서 출력하는 제1피크 검출기, 전치 증폭기에서 증폭된 신호와 제1기준전압을 입력하여 그 차를 증폭하는 제1리미팅 증폭기, 제1리미팅 증폭기에서 제한 증폭된 신호를 버퍼링하는 버퍼 및 버퍼에서 출력된 신호의 바텀 피크를 검출하여, 제어신호로서 출력하는 제1바텀 피크 검출기를 구비하는 것을 특징으로 하며, 소광비 특성을 고려한 피크 검출기를 이용함으로써, 소광비에 상응하는 DC 오프셋을 가지고 수신되는 버스트 패킷이 수신되어도 소광비에 상응하는 DC 오프셋의 영향을 받지 않고 실제 버스트 패킷의 탑 및 바텀 피크 전압을 정확히 검출할 수 있으며, 따라서, 수신장치에서 출력되는 신호의 파형 왜곡을 최소화할 수 있다.
Abstract:
본 발명은 버스트 모드 광 수신기에 관한 것으로, 버스트 모드 광 수신기는 입력 광신호를 전류신호로 변환하는 포토 디텍터; 전류신호를 전압신호로 변환하는 프리앰프; 프리앰프에서 출력되는 단일신호를 차동신호로 변환하는 단일-차동 변환기; 단일-차동 변환기에서 출력되는 차동신호를 증폭하고, 증폭시 발생하는 옵셋 또는 차동신호에 내재된 옵셋을 상쇄하는 포스트 앰프; 및 포스트 앰프에서 출력되는 차동신호로부터 데이터를 판별하는 판별부를 포함함을 특징으로한다.
Abstract:
PURPOSE: A burst-mode optical receiver using an extinction ratio characteristic of a received optical signal is provided to minimize distortion of a waveform of an output signal by detecting correctly a top peak voltage and a bottom peak voltage of a real burst packet. CONSTITUTION: A photo diode(PD1) is used for converting an optical signal having an extinction ratio characteristic and a burst characteristic to a current signal. A pre-amplifier(300) is used for converting the current signal to a voltage signal and amplifying the voltage signal. A first peak detector(310) is used for detecting a top peak voltage and a bottom peak voltage and outputting an intermediate value of the top peak voltage and the bottom peak voltage as a first reference voltage. A first limiting amplifier(320) is used for amplifying a difference between the amplified signal of the pre-amplifier and the first reference voltage. A buffer(350) is used for buffering an output signal of the first limiting amplifier. A first bottom peak detector(360) is used for outputting a bottom peak of an output signal of the buffer as a control signal.
Abstract:
PURPOSE: A pointer generating apparatus for transmitting structured data in an AAL1(ATM(Asynchronous Transfer Mode) Adaptation Layer type 1) and a method therefor are provided to perform a pointer calculation function capable of calculating a composite boundary about various user data. CONSTITUTION: A control signal generating unit(10) receives a sequence number signal and a start signal, and generates an enable signal and a control signal. An NCY(Next Cycle Boundary) generating unit(11) generates an NCY value by a pointer value and a pointer_P value for recording the sequence of an ATM cell. A modulo calculating unit(12) divides the NCY value inputted from the NCY generating unit(11) by a block size value, and obtains a residual value. A CCY(Current Cycle Boundary) generating unit(13) generates a CCY value by the NCY value inputted from the NCY generating unit(11), the residual value inputted from the modulo calculating unit(12) and the block size value inputted from the outside. A pointer calculating unit(14) generates the pointer value for boundary and the pointer_P value according to the CCY value inputted from the CCY generating unit(13).