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WLAN signal detection using a Bluetooth receiver during Bluetooth (TM) scanning activity
WLAN signal detection using a Bluetooth receiver during Bluetooth (TM) scanning activity
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机译:在蓝牙(TM)扫描活动期间使用蓝牙接收器进行WLAN信号检测
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摘要
A BT receiver RF front end receives RF energy in a sequence of BT scan windows. Throughout a scan window, the front end is tuned to one hop frequency. Before and after the window the front end is in a disabled state. A WLAN energy detector processes an output of the front end during the window and determines whether more than a predetermined amount of RF energy was received onto the front end during the window. A BT baseband processor attempts to demodulate the output of the front end. If the WLAN energy detector determines that the predetermined amount of RF energy was received and if a BT signal could not be demodulated, then a WLAN wake-up signal is asserted, thereby causing a WLAN transceiver to be powered up to receive WLAN signals. BT scan intervals are varied in duration to facilitate a BT scan window overlapping a WLAN beacon.
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