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RFM95 데이터시트(PDF) 38 Page - Shenzhen Hope Microelectronics Co., Ltd.

부품명 RFM95
상세설명  Low Power Long Range Transceiver Module
PDF  121 Pages
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제조업체  HOPERF [Shenzhen Hope Microelectronics Co., Ltd.]
홈페이지  https://hoperf.com/
Logo HOPERF - Shenzhen Hope Microelectronics Co., Ltd.

RFM95 데이터시트(HTML) 38 Page - Shenzhen Hope Microelectronics Co., Ltd.

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Page 38
RFM95/96/97/98(W)
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http:// www.hoperf.com
WIRELESS & SENSING
PRELIMINARY
DATASHEET
Channel Activity Detection
The use of a spread spectrum modulation technique presents challenges in determining whether the channel is already in
use by a signal that may be below the noise floor of the receiver. The use of the RSSI in this situation would clearly be
impracticable. To this end the channel activity detector is used to detect the presence of other LoRaTM  signals. Figure 10
shows the channel activity detection (CAD) process:
Figure 10.
LoRaTM  CAD flow



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