You need to not game on wireless, for starters. Even a router with higher throughput won't change the inherent flaws in wireless technology. It's great for file transfers, browsing, downloading, and even streaming, but terrible for anything that requires low latency, zero packet loss, and consistent throughput. Ethernet cable connected to your router will at least solve any problems you have there.
While ethernet cabling is definitely more desirable than wireless, it truly isn't that big of a deal. I play on wireless on my PC and wired on my PS3 (PS3 is next to the router, pc is not).. And I find no real difference in latency or stability. Wireless technology has come a long, long way my friend. Especially with wireless N nowadays.
My question for the OP is: You said your "signal strength" goes down. Do you mean the bars in BLOPS2 that show your connection/latency, or do you mean you wireless signal? If you mean in games or in blops, you need to upgrade your internet package. If you mean your wireless signal is lowering, you need a new/better router.
This post was edited on 11/19 at 11:36 am