Re: [Discuss-gnuradio] Implementation of dynamic spectrum access

[Yang]

Hi Adib,

I read your publications on gnuradio. What method did you use to sense the spectrum? How could you achieve that sensing time, 0.xx ms? I searched the forum for spectrum sense but find no explanation for slow sensing. 

Is there any other sensing methods applicable to gnuradio? The logic of spectrum_sense.py seems to be perfect.

Cheers,

-- 
Yang
Sent with Sparrow

On 2011年5月10日星期二 at 上午9:57, adib_sairi wrote:

Yang-56 wrote:

Ah, I got it. I will look into that.

Btw, generally speaking, how is the efficiency the spectrum sensing in gnu
radio? I use the spectrum_sense.py to sense 9M a step and generate 256
bins which takes me nearly 1 second to sense 1M. It is really slow...
--

you can see why it is slow when you use spectum_sense.py by browsing in this
forum. search for the spectrum sense discussion =)

in my case, i modify the code of fftsink_nongl.py (I cite it in my thesis
and in my coming paper in korea) ..the modification enable me to form an
energy detector spectrum sensor. and it is quite fast (in 0.xx ms). actually
it can be faster if you use faster PC and optimized same part of the code. I
am on my way to do this.. we also currently working on parallel or
simultaneous spectrum sensing with data transmission. therefore, we will
eliminate the constrain on sensing time and all its tradeoff.

Wallahualam.

Adib

-----
Mohd Adib Sarijari
Universiti Teknologi Malaysia

my website: http://trg.fke.utm.my/members/adib/
my faculty: http://www.fke.utm.my/
my university: http://www.utm.my/
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