I have the same issue with my new lenovo yoga 3 14".

$lspci -nn | tail -n1
02:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0041] (rev 20)

$ cat /sys/devices/virtual/dmi/id/product_version
Lenovo Yoga 3 14

I also have no rfkill switch, which means that my wireless was hard blocked.
I added my product version into the ideapad-laptop module from 
git://kernel.ubuntu.com/ubuntu/ubuntu-vivid.git (see attached patch).

Now it is no more hard blocked
$ rfkill list
0: ideapad_wlan: Wireless LAN
        Soft blocked: no
        Hard blocked: no

But still not usable.

I'm willing to test anything you propose.

** Patch added: "Add "Lenovo Yoga 3 14" id to no_hw_rfkill_list."
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1436940/+attachment/4431155/+files/ideapad-laptop.c.LenovoYoga314.patch

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https://bugs.launchpad.net/bugs/1436940

Title:
  Atheros wifi 168c:0041(QCA6164) is not supported

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