To get the best performance out of your wireless network, you need to ensure that your access points (APs) are placed in the best locations and that other radio emitters are kept to a minimum. To do this will require you to periodically perform site surveys of your wireless spectrum, and depending on the scale of your installation, there are a number of tools available for the task.
In this story for Computerworld, I talk about what is involved and which tools are best for which tasks in doing the site surveys.