Frequency hopping spread-spectrum radio communications

Details Frequency hopping spread-spectrum radio communications Frequency hopping spread-spectrum radio communications

H - Electricity

04

B

H04B 1/713 (2006.01) G08B 21/02 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2450503

Disclosed is a fast scanning method for a scanning a plurality of frequency-hopping spread-spectrum frequencies, the method comprising the following steps in the order set forth: (A) selecting a frequency from a pre-determined plurality of frequency-hopping spread-spectrum frequencies; (B) measuring the Received Signal Strength Indication (RSSI) of the selected frequency; (C) starting a first timer when the RSSI is above a predetermined threshold, otherwise skipping to step (H); (D) waiting for bit synch until the first timer expires, skipping to step (H) when the timer expires and bit synch is not achieved; (E) starting a second timer when bit synch has been achieved; (F) waiting for a data packet until the second timer expires, skipping to step (H) whenever the data packet has not been received and the timer expires; (G) validating the data packet; (H) selecting another frequency from the predetermined plurality of frequency-hopped spread-spectrum frequencies; and (I) returning to step (B).

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