发明申请
- 专利标题： SYSTEMS AND METHODS FOR DETECTING THE PRESENCE OF A TRANSMISSION SIGNAL IN A WIRELESS CHANNEL
- 专利标题（中）： 用于检测无线信道中传输信号的存在的系统和方法
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申请号： US11935911申请日： 2007-11-06
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公开(公告)号： US20080112467A1公开(公告)日： 2008-05-15
- 发明人: Stephen J. Shellhammer
- 申请人： Stephen J. Shellhammer
- 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： H04B1/69
- IPC分类号： H04B1/69
摘要：
A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is compared to a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.
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