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    • 21. 发明公开
    • 적응 버스트 동기식 복조장치
    • 自适应爆破同步解调装置
    • KR1020000033095A
    • 2000-06-15
    • KR1019980049778
    • 1998-11-19
    • 에스케이하이닉스 주식회사
    • 김선택
    • H04B1/40
    • H04L27/2273H04L27/2276H04L27/2338
    • PURPOSE: An adaptive burst synchronous demodulation apparatus is to provide the demodulation method suitable for rapid single path rail ray fading channel by changing only the demodulation method in the receiving side with the existing modulation method used. CONSTITUTION: A pi/4DQPSK modulator(1) modulates transmitting signal into pi/4DQPSK. A raised cosine filter(2) filters the output of the pi/4DQPSK modulator(1). A fading channel part(3) is connected to the raised cosine filter(2). A first addition device(4) adds the signal faded by the fading channel part(3) and AWGN(Additive White Gaussian Noise). A level detection part(5) detects the level of the receiving signal sampled through the first addition device(4). A control part(6) judges the strength of the receiving signal detected by the first addition device(4). A multiplication device(7) multiplies the sample receiving signal and a phase assumption value. A phase error detection part(8) detects the phase error outputted through the multiplication device(7). An infinite impulse response adaptive trace device(9) removes phase noise. A PLL(10) makes the infinite impulse response adaptive trace device(9) operated stably. A second addition device(11) adds the outputs of the infinite impulse response adaptive trace device(9) and the PLL(10). A third addition device(12) adds the outputs of the phase error detection part(8) and the second addition device(11). An interpolation and buffer(13) assumes the phase error. A pi/4DQPSK demodulator(14) demodulates the output signal of the interpolation and buffer(13) into pi/4DQPSK.
    • 目的:一种自适应突发同步解调装置,通过仅利用现有的调制方式改变接收侧的解调方式,提供适用于快速单路径光纤衰落信道的解调方法。 构成:pi / 4DQPSK调制器(1)将发送信号调制成pi / 4DQPSK。 升余弦滤波器(2)对pi / 4DQPSK调制器(1)的输出进行滤波。 衰减信道部分(3)连接到升余弦滤波器(2)。 第一加法装置(4)将由衰落信道部分(3)褪色的信号和AWGN(加性白高斯噪声)相加。 电平检测部分(5)检测通过第一加法装置(4)采样的接收信号的电平。 控制部(6)判断由第一追加装置(4)检测到的接收信号的强度。 乘法装置(7)将采样接收信号和相位假设值相乘。 相位误差检测部(8)检测通过乘法装置(7)输出的相位误差。 无限脉冲响应自适应跟踪装置(9)消除相位噪声。 PLL(10)使得无限脉冲响应自适应跟踪装置(9)稳定地工作。 第二加法装置(11)将无限脉冲响应自适应跟踪装置(9)和PLL(10)的输出相加。 第三加法装置(12)将相位误差检测部(8)和第二加法装置(11)的输出相加。 内插和缓冲器(13)假设相位误差。 pi / 4DQPSK解调器(14)将内插和缓冲器(13)的输出信号解调成pi / 4DQPSK。
    • 26. 发明公开
    • 방송 및 통신 시스템에서 신호 변조 방법 및 장치
    • 调制信号在广播和通信系统中的方法与装置
    • KR1020120040636A
    • 2012-04-27
    • KR1020110015492
    • 2011-02-22
    • 한국전자통신연구원
    • 서재현임형수김흥묵이수인
    • H04L27/36H04L27/20
    • H04L27/206H04L27/2273
    • PURPOSE: A method and an apparatus of modulating a signal in a broadcasting and communication system are provided to ensure backward compatibility by applying a hierarchical modulation technology to a QPSK(Quadrature Phase Shift Keying) modulation technique. CONSTITUTION: A first QPSK modulation unit(300) generates an I signal and a Q signal by using I data and Q data for input. A phase rotation unit(310) outputs an Re(I,Q) signal and an Im(I,Q) signal by rotating the phase of the Q signal and the I signal generated. A second QPSK modulation unit(301) generates an I' signal and a Q' signal by using I' data and Q' data for input. A hierarchical modulation unit(320) outputs an Re(I,Q,I') signal by combining the Re(I,Q) signal outputted from the phase rotation unit and the I' signal outputted from the second QPSK modulation unit.
    • 目的:提供一种在广播和通信系统中调制信号的方法和装置,以通过将分层调制技术应用于QPSK(正交相移键控)调制技术来确保向后兼容性。 构成:第一QPSK调制单元(300)通过使用I数据和Q数据输入来产生I信号和Q信号。 相位旋转单元(310)通过旋转Q信号的相位和产生的I信号来输出Re(I,Q)信号和Im(I,Q)信号。 第二QPSK调制单元(301)通过使用I'数据和Q'数据输入来产生I'信号和Q'信号。 分级调制单元(320)通过组合从相位旋转单元输出的Re(I,Q)信号和从第二QPSK调制单元输出的I'信号,输出Re(I,Q,I')信号。
    • 28. 发明公开
    • 위상천이기를 이용한 BPSK 복조 장치 및 방법
    • 使用相位切换器的二相相移键控解调器的装置和方法
    • KR1020100069282A
    • 2010-06-24
    • KR1020080127931
    • 2008-12-16
    • 한국전자통신연구원
    • 박승근박진아홍헌진
    • H04L27/22
    • H04L27/2273
    • PURPOSE: A BPSK demodulation device and a method thereof are provided to reduce a bit error rate by discriminating the transmission phase angle in a new discrimination region. CONSTITUTION: An I signal generator(130) generates an in-phase signal from a received BPSK signal. A Q-signal generator(150) generates a Quadrature-phase signal from the received BPSK signal by using a plurality of phase shifters. An oscillator(140) generates a first signal for dividing a baseband signal. A discriminating part(160) distinguishes the transmission phase angle from the I-signal and the Q-signal. A RX-antenna(110) receives the BPSK signal. A low noise amplifier(120) amplifies the received BPSK signal.
    • 目的:提供一种BPSK解调装置及其方法,以通过区分新的鉴别区域中的传输相位角来减小误码率。 构成:I信号发生器(130)从接收到的BPSK信号产生同相信号。 Q信号发生器(150)通过使用多个移相器从所接收的BPSK信号产生正交相位信号。 振荡器(140)产生用于划分基带信号的第一信号。 识别部分(160)将传输相位角与I信号和Q信号区分开。 RX天线(110)接收BPSK信号。 低噪声放大器(120)放大接收到的BPSK信号。
    • 29. 发明公开
    • 위상을 제어할 수 있는 직교 신호 위상 제어기
    • 用于控制相的三相信号相控制器
    • KR1020100060410A
    • 2010-06-07
    • KR1020080118994
    • 2008-11-27
    • 삼성전자주식회사
    • 고상수
    • H03D7/18H04B1/10H04L25/02
    • H04L27/2273H04B1/30H03D7/18H04B1/10H04L25/02
    • PURPOSE: A quadrature signal phase controller is provided to enhance the image rejection ratio of a receiver by consecutively and variably controlling the phase between a common mode signal and a quadrature phase signal. CONSTITUTION: A first phase shifter(30) combines each of common differential input signals and each of quadrature phase differential input signals in response to one or both of a first control signal and a second control signal. The first phase shifter generates phase-shifted first common mode differential output signals and phase-shifted first quadrature phase differential output signals. A second phase shifter(40) combines each of the common mode differential input signals and each of the quadrature phase differential input signals in response to one or both of the first control signal and the second control signal. The second phase shifter generates phase-shifted second differential output signals and phase-shifted second quadrature phase differential output signals.
    • 目的:提供正交信号相位控制器,通过连续和可变地控制共模信号和正交相位信号之间的相位来增强接收机的图像抑制比。 构成:第一移相器(30)响应于第一控制信号和第二控制信号中的一个或两者,组合每个公共差分输入信号和每个正交相位差分输入信号。 第一移相器产生相移的第一共模差分输出信号和相移的第一正交相位差分输出信号。 第二移相器(40)响应于第一控制信号和第二控制信号中的一个或两者,组合每个共模差分输入信号和每个正交相位差分输入信号。 第二移相器产生相移的第二差分输出信号和相移的第二正交相位差分输出信号。