Information from noise
If you ever wondered why your good cellphone connection just started making that scratchy noise when you stepped couple of feet away or during your daily commute your favorite NPR station produced that awful hiss when stopped at a red light and so on.. you are witnessing a wireless phenomenon called fading. Technically, there are two types of fading: multipath and shadow. The first one is mostly the cause for drastic signal change when you move very short distances. This is c