发明申请
US20130034128A1 ECHO CANCELLATION REPEATER OPERATION IN THE ABSENCE OF AN INPUT SIGNAL
审中-公开
ECHO取消重复操作在输入信号的禁止
- 专利标题： ECHO CANCELLATION REPEATER OPERATION IN THE ABSENCE OF AN INPUT SIGNAL
- 专利标题（中）： ECHO取消重复操作在输入信号的禁止
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申请号： US13204397申请日： 2011-08-05
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公开(公告)号： US20130034128A1公开(公告)日： 2013-02-07
- 发明人: Dhananjay Ashok Gore , Gwendolyn Denise Barriac , Michael Mao Wang , Tao Tian
- 申请人： Dhananjay Ashok Gore , Gwendolyn Denise Barriac , Michael Mao Wang , Tao Tian
- 申请人地址： US CA San Diego
- 专利权人： QUALCOMM INCORPORATED
- 当前专利权人： QUALCOMM INCORPORATED
- 当前专利权人地址： US CA San Diego
- 主分类号： H04L25/20
- IPC分类号： H04L25/20
摘要：
A wireless repeater introduces a low level noise to the signal path of the repeater where the introduced noise is used to facilitate channel estimation. The introduced low power level noise may be added to the receive signal or to the transmit signal. The low power noise signal ensures that the repeater always has a reference signal for performing channel estimation, even when the repeater is not receiving any incoming signal traffic. In one embodiment, a low noise signal is inserted to the transmit circuit of the repeater. In another embodiment, the repeater is configured to increase the noise figure of the receive circuit where the detected noise figure acts as a receive signal.
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