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    • 2. 发明公开
    • AM 라디오 신호 처리 방법, AM 라디오 신호 처리 회로, 복조기 및 수신기
    • 使用加权LSB / USB SUM进行干扰减轻的相关调制解调器
    • KR1020050105234A
    • 2005-11-03
    • KR1020057015535
    • 2004-01-29
    • 아이비큐티 디지털 코포레이션
    • 크로거브라이언윌리엄
    • H04L27/06H03D1/24
    • H03D1/2245H03D1/04
    • A method of processing an AM radio signal comprises the step of receiving an AM radio signal including an upper sideband portion and a lower sideband portion, demodulating the upper sideband portion and the lower sideband portion to produce a demodulated upper sideband signal and a demodulated lower sideband signal, weighting the demodulated upper sideband signal and the demodulated lower sideband signal in response to noise power to produce a weighted demodulated upper sideband signal and a weighted demodulated lower sideband signal, and combining the weighted demodulated upper sideband signal and the weighted demodulated lower sideband signal to produce an output signal. Demodulators which process AM radio signals in accordance with the method, and receivers incorporating the demodulators, are also included.
    • 一种处理AM无线电信号的方法包括接收包括上边带部分和下边带部分的AM无线电信号的步骤,解调上边带部分和下边带部分,以产生解调的上边带信号和解调的下边带 信号,响应于噪声功率对解调的上边带信号和解调的下边带信号进行加权,以产生加权解调的上边带信号和加权解调的下边带信号,并将加权解调的上边带信号和加权解调的下边带信号 以产生输出信号。 还包括根据该方法处理AM无线电信号的解调器和并入解调器的接收机。
    • 7. 发明公开
    • 노이즈 캔슬러 및 그것을 이용한 AM 수신 장치
    • 噪音消除和接收装置使用它
    • KR1020070101800A
    • 2007-10-17
    • KR1020070035988
    • 2007-04-12
    • 산요덴키가부시키가이샤
    • 스즈끼준
    • H04B1/10H04B15/00H04B3/10
    • H03D1/04H04B15/00
    • A noise canceller and an AM receiving apparatus using the same are provided to solve a problem that when a level hold time is excessively long with respect to a pulse width of pulse noise, the pulse nose can be reliably canceled but a distortion rate of waveform of a reception signal is degraded to degrade sound quality in reproduction, and when the level hold time is excessively short with respect to the pulse width of the pulse noise, the pulse noise cannot be canceled. A pulse noise detecting unit, which includes an HPF(High Pass Filter)(110), a noise amplifier(120), a noise AGC(Automatic Gain Controller)(130) and a comparator(140), detects pulse noise overlapped in a reception signal. An S meter(20) detects the level of the reception signal. A level hold unit(150) holds the level of the reception signal according to the detection of the pulse noise by the pulse noise detecting unit. A level hold period setting unit(160) sets a level hold period, during which the level hold unit(150) holds level, according to the level of the reception signal detected by the S meter(20).
    • 提供了一种噪声消除器和使用其的AM接收装置,以解决当电平保持时间相对于脉冲噪声的脉冲宽度过长时,可以可靠地消除脉冲前端, 接收信号劣化以降低再现中的声音质量,并且当电平保持时间相对于脉冲噪声的脉冲宽度过短时,不能消除脉冲噪声。 包括HPF(高通滤波器)(110),噪声放大器(120),噪声AGC(自动增益控制器)(130)和比较器(140))的脉冲噪声检测单元检测在 接收信号。 S表(20)检测接收信号的电平。 电平保持单元(150)通过脉冲噪声检测单元根据脉冲噪声的检测保持接收信号的电平。 电平保持期间设定部(160)根据由S表(20)检测出的接收信号的电平,设定电平保持单元(150)保持电平的电平保持期间。