This article presents methods of extending the range of a low-power RF system in the typical environment of a wireless channel. It uses real-world measurements from both indoor and outdoor wireless channels, and discusses techniques to achieve reliable communication with low-power wireless devices.
It also examines various diversity schemes, with a review of their benefits and tradeoffs (performance, complexity, and cost) and relates this to the multipath environment. The comprehensive article includes graphs of the data, a summary table, suggestions for further reading, and links to specific reference material.
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About the Author
Thomas Almholt is a senior RF applications engineer for Texas Instruments Low-Power RF group. He has extensive experience as the technical lead for RF system validation of multiple fully-integrated, GSM/EDGE-compliant devices. Thomas received his Master’s Degree in RF Systems and Telecommunications engineering from the University of Aalborg, Denmark.