Optimizing the RF Link: Conclusion

Optimizing the RF Link: Conclusion

Conclusion

Our overall recommendation is to design the RF link with about 10-15 dB fade margin to account for changes in the environmental and operational conditions.  Changes in orientation of mobile nodes can affect the link margin. Use the highest gain antenna possible within the physical constraints of the system. The objective is to operate the link with the highest SNR (RSSI) possible (the sweet spot for Smart Radio is around -40 dBm to -70 dBm RSSI). A higher RSSI level will allow the link to operate at the highest modulation, and provide the best throughput, interference resistance and reliability.

References

[1]   EverythingRF Freespace Path Loss Calculator, https://www.everythingrf.com/rf-calculators/free-space-path-loss-calculator, Feb 2021

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