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1. 发明授权

US06763106B1 Signal detector with duration-based frame width 失效
标题翻译：信号检测器，基于持续时间的帧宽度
公开(公告)号：US06763106B1
公开(公告)日：2004-07-13
申请号：US09196267
申请日：1998-11-19
申请人： Jin Li , Yan Zhou , Vijayakumaran Velayudhan Nair
发明人： Jin Li , Yan Zhou , Vijayakumaran Velayudhan Nair
IPC分类号： H04M100
CPC分类号： H04M1/50
摘要： A signal detector for detecting at least a first signal having a first frequency and a first minimum duration is provided. The signal detector includes a matched transform unit and an energy level detection unit. The matched transform unit is adapted to receive at least a first frame of time domain input samples at a sampling frequency and generate at least a first frequency energy value for the first frame based on at least a first subset of the time domain input samples. The first subset of the first frame has a width of less than about one half of the first minimum duration. The energy level threshold unit is adapted to compare the first frequency energy value to a threshold energy value to determine the presence of the first signal. A method for detecting at least a first signal having a first frequency and a first minimum duration is provided. The method includes receiving at least a first frame of time domain input samples at a sampling frequency. At least a first frequency energy value is generated for the first frame based on at least a first subset of the time domain input samples. The first subset of the first frame has a width of less than about one half of the first minimum duration. The first frequency energy value is compared to a threshold energy value to determine the presence of the first signal.
摘要翻译：提供一种用于检测至少具有第一频率和第一最小持续时间的第一信号的信号检测器。信号检测器包括匹配变换单元和能级检测单元。匹配变换单元适于以采样频率接收时域输入采样的至少第一帧，并且基于时域输入采样的至少第一子集生成用于第一帧的至少第一频率能量值。第一帧的第一子集具有小于第一最小持续时间的大约一半的宽度。能级阈值单元适于将第一频率能量值与阈值能量值进行比较，以确定第一信号的存在。提供一种用于检测至少具有第一频率和第一最小持续时间的第一信号的方法。该方法包括以采样频率接收时域输入采样的至少第一帧。基于时域输入样本的至少第一子集，为第一帧生成至少第一频率能量值。第一帧的第一子集具有小于第一最小持续时间的大约一半的宽度。将第一频率能量值与阈值能量值进行比较，以确定第一信号的存在。

2. 发明授权

US06556674B1 Signal detector with matched filter coefficient 失效
标题翻译：具有匹配滤波器系数的信号检测器
公开(公告)号：US06556674B1
公开(公告)日：2003-04-29
申请号：US09196258
申请日：1998-11-19
申请人： Jin Li , Vijayakumaran Velayudhan Nair , Yan Zhou
发明人： Jin Li , Vijayakumaran Velayudhan Nair , Yan Zhou
IPC分类号： H04M300
CPC分类号： H04Q1/45
摘要： A signal detector for detecting at least a first signal having a first frequency includes a matched transform unit and an energy level threshold unit. The matched transform unit is adapted to receive at least a first frame of time domain input samples at a sampling frequency and generate at least a first frequency energy value for the first frame based on at least a first subset of the time domain input samples and a first matched filter coefficient. The sampling frequency is a non-integral multiple of the first frequency, and the first matched filter coefficient depends on the first frequency. The energy level threshold unit is adapted to compare the first frequency energy value to a threshold energy value to determine the presence of the first signal. A method for detecting at least a first signal having a first frequency is provided. The method includes receiving at least a first frame of time domain input samples at a sampling frequency. At least a first frequency energy value for the first frame is generated based on at least a first subset of the time domain input samples and a first matched filter coefficient. The sampling frequency is a non-integral multiple of the first frequency, and the first matched filter coefficient depends on the first frequency. The first frequency energy value is compared to a threshold energy value to determine the presence of the first signal.
摘要翻译：用于检测具有第一频率的至少第一信号的信号检测器包括匹配变换单元和能级阈值单元。匹配变换单元适于以采样频率接收时域输入样本的至少第一帧，并且基于时域输入采样的至少第一子集和第一帧生成至少第一频率能量值第一匹配滤波器系数。采样频率是第一频率的非积分倍数，第一匹配滤波器系数取决于第一频率。能级阈值单元适于将第一频率能量值与阈值能量值进行比较，以确定第一信号的存在。提供一种用于检测至少具有第一频率的第一信号的方法。该方法包括以采样频率接收时域输入采样的至少第一帧。至少基于时域输入样本的第一子集和第一匹配滤波器系数来生成第一帧的第一频率能量值。采样频率是第一频率的非积分倍数，第一匹配滤波器系数取决于第一频率。将第一频率能量值与阈值能量值进行比较，以确定第一信号的存在。

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