Deploying License-Free Wireless Wide-Area Networks

Wireless Link Budget

A wireless link budget calculation totals the signal gains, subtracts the signal losses over the length of a wireless link, and predicts whether the signal level that arrives at the receiver will be high enough for the link to work reliably. If the link budget predicts that the link will not work reliably, you can examine the gain of each link budget element to see which elements to change and by how much to get the link to work.

NOTE

The following link budget discussion explains the link budget elements as if the signal path went only one way: from Transmitter A to Receiver B. Wireless WAN links in the real world operate in both directions—with a transmitter and a receiver at each end of every link. Therefore, your two-way ...