Re: [Discuss-gnuradio] Use gnu-radio & usrp to make a wireless relay node

[Marcus Müller]

That's a very good approach! You should add a second WiFi interface to
your laptop, so that you can see with one interface what you're doing
with the other.

You could look for USB sticks that in this table [1] have both
"cfg80211" and "AP" marked with "yes"; it's probably easiest to find a
USB Wifi adapter with ath9k_htc chipset [2], or the rt2500 or rt2800
chipset (tend to be cheaper); note that these lists are not comprehensive.

Best regards,
Marcus

[1] http://linuxwireless.sipsolutions.net/en/users/Drivers/
[2]
http://linuxwireless.sipsolutions.net/en/users/Drivers/ath9k_htc/devices/
[3]
http://linuxwireless.sipsolutions.net/en/users/Drivers/rt2500usb/devices/
[4]
http://linuxwireless.sipsolutions.net/en/users/Drivers/rt2800usb/devices/
On 14.12.2015 13:40, Shilei Tian wrote:
> Hi Marcus,
>
> Thanks for your information. I’ll try to experiment with a Linux laptop 
> first, and then consider to buy some wireless routers support OpenWRT.
>
> ----------
>
> Sincerely yours,
>
> Shilei Tian（田世磊）
> Postgraduate Student
> Department of Computer Science and Engineering
> Shanghai Jiao Tong University
>
>> On Dec 14, 2015, at 16:28, Marcus Müller <address@hidden> wrote:
>>
>> Hi Shilei Tian,
>>
>> It's a
>>
>> TP-Link TL-WDR4300 v1
>>
>> that I bought used. It's running a current build of OpenWRT, and is
>> based on an Atheros AR9344 MIPS CPU / 2.4GHz wifi SoC and has an
>> additional Atheros AR9580 Wifi controller for 5GHz.
>>
>> As mentioned, I can set different TX power settings in the OpenWRT UI.
>>
>> Here's a page with a lot of info on the device:
>> http://wiki.openwrt.org/toh/tp-link/tl-wdr4300#hardware
>>
>> Notice that such routers are often only sold regionally, and it might be
>> hard to get exactly my model in Shanghai. But OpenWRT has a nice table
>> of supported devices; maybe you can find one that works and has the same
>> chips.
>>
>> Best regards,
>> Marcus
>>
>> On 14.12.2015 03:43, Shilei Tian wrote:
>>> Hi Marcus,
>>>
>>> Thanks for your patience and kindness. Could you please tell me the your 
>>> wireless router model?
>>>
>>> Actually, I’m working on a new wireless relay cover algorithm, and the 
>>> mathematical model I use is that the cover radius is adjustable, in order 
>>> to make it, I think what I want is a Wi-Fi device whose TX power could be 
>>> set.
>>>
>>> I haven’t experimented with the Acess Point on my PC yet, but I’ll try it 
>>> later.
>>> ----------
>>>
>>> Sincerely yours,
>>>
>>> Shilei Tian（田世磊）
>>> Postgraduate Student
>>> Department of Computer Science and Engineering
>>> Shanghai Jiao Tong University
>>>
>>>> On Dec 14, 2015, at 03:22, Marcus Müller <address@hidden> wrote:
>>>>
>>>> Marcus