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1. 发明申请

US20170302318A1 FM RECEPTION DEVICE, FM RECEPTION METHOD FOR RECEIVING FM SIGNALS 审中-公开
公开(公告)号：US20170302318A1
公开(公告)日：2017-10-19
申请号：US15635437
申请日：2017-06-28
申请人： JVC KENWOOD Corporation
发明人： Yasuhide OKUHATA
IPC分类号： H04B1/30 , H04L27/152 , H04L27/00
CPC分类号： H04B1/30 , H04B1/10 , H04B2001/305 , H04L27/0014 , H04L27/14 , H04L27/142 , H04L27/1525 , H04L27/16 , H04L2027/0057 , H04L2027/0065
摘要： A quadrature detection unit subjects an FM signal to quadrature detection using a local oscillation signal and outputs a base band signal. A first correction unit and a second correction unit correct the base band signal using a DC offset correction value. A DC offset detection unit subjects the corrected base band signal to rectangular to polar conversion and derives the DC offset correction value such that amplitudes in a plurality of phase domains defined in an IQ plane approximate each other. An FM detection unit subjects the corrected base band signal to FM detection and generates a detection signal. An addition unit adds an offset to the detection signal. An AFC unit generates a control signal for controlling a frequency of a local oscillation signal based on the detection signal to which the offset is added.

2. 发明申请

US20160218901A1 FM RECEIVER AND FM RECEIVING METHOD FOR RECEIVING FM SIGNAL 有权
标题翻译：用于接收FM信号的FM接收机和FM接收方法
公开(公告)号：US20160218901A1
公开(公告)日：2016-07-28
申请号：US14991963
申请日：2016-01-10
申请人： JVC KENWOOD Corporation
发明人： Yasuhide OKUHATA
IPC分类号： H04L27/14 , H04L25/06
CPC分类号： H04L27/142 , H04L25/06
摘要： A quadrature detector performs a quadrature detection on an FM signal based on a local oscillation signal, and outputs a baseband signal. A first corrector and a second corrector perform a correction on the baseband signal based on a DC offset correction value. The DC offset detector performs a polar coordinate conversion on the baseband signal, and derives the DC offset value in such a way that respective amplitudes in a plurality of phase domains defined on an IQ plane approximate one another. An FM detector performs an FM detection on the corrected baseband signal, and generates a detection signal. A controller controls the frequency of the local oscillation signal in such a way that a phase component having undergone the polar coordinate conversion by the DC offset detector is rotated.
摘要翻译：正交检波器基于本地振荡信号对FM信号进行正交检波，并输出基带信号。第一校正器和第二校正器基于DC偏移校正值对基带信号执行校正。 DC偏移检测器对基带信号执行极坐标转换，并且以这样的方式导出DC偏移值，使得在IQ平面上定义的多个相域中的相应幅度彼此相近。 FM检测器对校正的基带信号进行FM检测，并产生检测信号。控制器以这样的方式控制本地振荡信号的频率，使得经过DC偏移检测器经过极坐标转换的相位分量旋转。

3. 发明申请

US20150236878A1 FM RECEIVER THAT RECEIVES FM SIGNAL AND METHOD FOR RECEIVING FM SIGNAL 有权
标题翻译：接收FM信号的FM接收机和接收FM信号的方法
公开(公告)号：US20150236878A1
公开(公告)日：2015-08-20
申请号：US14622161
申请日：2015-02-13
申请人： JVC KENWOOD Corporation
发明人： Yasuhide OKUHATA
IPC分类号： H04L27/14 , H04L25/02
CPC分类号： H04L25/0262 , H03C3/09 , H04L27/1525
摘要： A quadrature detector quadrature-detects an FM signal. A first reducer and a second reducer reduce a direct current component included in the FM signal quadrature-detected in the quadrature detector. An FM detector generates a detection signal by FM detecting the FM signal in which the direct current component has been reduced by the first reducer and the second reducer. The offset unit adds an offset to the detection signal generated in the FM detector. An AFC unit generates a control signal for controlling the frequency of a local oscillation signal used in the quadrature detector on the basis of the detection signal to which the offset has been added by the offset unit and feeds back the control signal to a local oscillator that should output the local oscillation signal.
摘要翻译：正交检波器正交检测FM信号。第一减速器和第二减速器减少包括在正交检波器中正交检波的FM信号中的直流分量。 FM检测器通过FM检测由第一减速器和第二减速器减小了直流分量的FM信号来产生检测信号。偏移单元向FM检测器中生成的检测信号增加偏移量。 AFC单元基于偏移单元已经添加了偏移的检测信号，生成用于控制在正交检测器中使用的本地振荡信号的频率的控制信号，并将控制信号反馈到本地振荡器，该本地振荡器应输出本地振荡信号。

4. 发明申请

US20170302311A1 FM RECEPTION DEVICE, FM RECEPTION METHOD FOR RECEIVING FM SIGNALS 审中-公开
公开(公告)号：US20170302311A1
公开(公告)日：2017-10-19
申请号：US15635492
申请日：2017-06-28
申请人： JVC KENWOOD Corporation
发明人： Yasuhide OKUHATA
IPC分类号： H04B1/10 , H04B1/16
CPC分类号： H04B1/10 , H04B1/16 , H04B1/26 , H04B1/30 , H04L27/142
摘要： A first local oscillator generates a modulation signal of a predetermined frequency. A second local oscillator outputs a local oscillation signal frequency-modulated by using the modulation signal from the first local oscillator. A quadrature detection unit subjects an FM signal to quadrature detection by using the local oscillation signal output from the second local oscillator and outputs a base band signal. A first reduction unit and a second reduction unit reduce a direct current component contained in the base band signal. A correction unit restores the direct current component by correcting the base band signal such that the base band signal is centered around an origin of a polar coordinate system on an IQ plane. An FM detection unit subjects the corrected base band signal to FM detection and generates a detection signal.

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