Question about the driver of wifi-card

["corvuscorax" <422358324@qq.com>]

Hello! I have trouble in installing driver of my wifi card..
(My computer is "DELL Inpiron 14 5000 Series", the Os is debian 3.16.2. The wifi card should be Intel AC 3160..I think)

I can't see my wifi card by using "lspci ",
it just shows "02:00.0 Network controller: Intel Corporation Device 08b3 (rev 83)"

And "iwconfig" shows:
eth0      no wireless extensions.
lo        no wireless extensions.

I download the driver "iwlwifi-3160-8.ucode", and "cp" it into /lib/firmware. However, I think it doesn't work....
I have checked the "hotplug", it was chosen in kernel-config. What's more , my USB can be recognized easily.....

Any suggestion?