Here's a few things you should know about wireless routers (If you don't know already)
They work using a channel range much like the radio on your car. Have you ever started driving somewhere and two radio stations seem to mesh together?
This is what happens when the station's frequency range mixes with another that's in range.
To keep it simple, your G/N router uses channels 1 - 11. Again I'm keeping it simple and not getting into the advanced settings for explanation. If
you're on Channel 1, and your neighbor is on Channel 1, there will be interference and it'll become problematic as packets will start to drop and
your net will become slow or in some case unusable.
You can go into your router, usually the URL is 192.168.1.1 as the default route, and log into your router, change the channel and see what happens.
The better channels are 1, 3, 6, 9 and 12. Do note that if you pick Channel 2 for example, you'll be using up some space on channel 1 and channel 3.
Google/Youtube can be very helpful at explaining this better than I and the more advanced settings and how to narrow it down for maximum
Every router comes with an SSID Broadcast, which is what you see when you connect to your internet. "Connected to LinksysE3000" or whatever you
named yours. You'll see this when you click on the wifi button on whatever you're using to connect to the internet. It'll display various wifi
You can disable the SSID Broadcast (usually in the wireless settings of the router) and your wifi signal won't come up in the connection list. Anyone
that wants to connect to your router will have to know the SSID and to do that you'll need to use wireshark or something.
IMPORTANT: If you do disable the SSID Broadcast, you will need to KNOW exactly what it is, otherwise you won't be able to sign onto the internet.
Determining if it's a Jammer
You can determine this by getting a wifi application that monitors the wifi signals using your wireless card. You can download one of those
applications for PC or get it for Android/iPhone. If all channels suddenly drop, that means they are most probably using a Jammer or the sun just shot
a solar flare at your house. Logging this is important if you want to use legal action since Jammers are illegal.
REMEMBER TO CHANGE THE DEFAULT PASSWORD ON YOUR ROUTER'S LOGIN! If it's still linksys / admin, then you have to change that.