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公开(公告)号:US07903763B2
公开(公告)日:2011-03-08
申请号:US11701164
申请日:2007-01-31
申请人: Jiri Andrle , Jan Ingerle , Petr Kopecky
发明人: Jiri Andrle , Jan Ingerle , Petr Kopecky
IPC分类号: H04L27/00
CPC分类号: H04B1/1027 , H03J5/242
摘要: A system and method to optimize the quality of a modulated signal. In one aspect, an AM demodulator is used in conjunction with proper bandwidth selection of an FM signal. For example, the AM demodulator can be used to generate an instantaneous absolute value of the FM signal. The average value of the FM signal over a period of time is subtracted from the instantaneous absolute value in order to determine a variance in amplitude in the FM signal. In another aspect, several filters may be tested and the one having the lowest variance in amplitude may be used in order to select the filter having the desirable bandwidth.
摘要翻译: 一种优化调制信号质量的系统和方法。 在一个方面,AM解调器与FM信号的适当带宽选择结合使用。 例如,AM解调器可用于产生FM信号的瞬时绝对值。 为了确定FM信号中的幅度方差,从瞬时绝对值中减去一段时间内的FM信号的平均值。 在另一方面,可以测试几个滤波器,并且可以使用具有最小幅度变化的滤波器,以便选择具有期望带宽的滤波器。
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公开(公告)号:US20080181294A1
公开(公告)日:2008-07-31
申请号:US11701164
申请日:2007-01-31
申请人: Jiri Andrle , Jan Ingerle , Petr Kopecky
发明人: Jiri Andrle , Jan Ingerle , Petr Kopecky
IPC分类号: H03K7/04
CPC分类号: H04B1/1027 , H03J5/242
摘要: A system and method to optimize the quality of a modulated signal. In one aspect, an AM demodulator is used in conjunction with proper bandwidth selection of an FM signal. For example, the AM demodulator can be used to generate an instantaneous absolute value of the FM signal. The average value of the FM signal over a period of time is subtracted from the instantaneous absolute value in order to determine a variance in amplitude in the FM signal. In another aspect, several filters may be tested and the one having the lowest variance in amplitude may be used in order to select the filter having the desirable bandwidth.
摘要翻译: 一种优化调制信号质量的系统和方法。 在一个方面,AM解调器与FM信号的适当带宽选择结合使用。 例如,AM解调器可用于产生FM信号的瞬时绝对值。 为了确定FM信号中的幅度方差,从瞬时绝对值中减去一段时间内的FM信号的平均值。 在另一方面,可以测试几个滤波器,并且可以使用具有最小幅度变化的滤波器,以便选择具有期望带宽的滤波器。
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