Re: [Discuss-gnuradio] OFDM link simulation

[Aditya Dhananjay]

Hi Sara,

Please look at the OFDM TX/RX examples in GNU Radio Companion. It's already there for you. :)

best,
aditya

On Tue, Mar 18, 2014 at 8:44 PM, Sara Chérif <address@hidden> wrote:

I want to simulate an OFDM link to carry 214 bytes per Ethernet packet & implement it using 2 laptops running GNU & 2 USRPs.
Each USRP is a TX & RX .(FULL-DUPLEX)

I calculated all OFDM parameters needed.

total BW=200KHz
sample Rate=240k

symbol time including CP=5ms= 8-burst gsm ( one burst is 0.6ms)

T guard= CP =625u

T data="">

2 bits/subcarrier (QPSK)

number of bits/ ofdm symbol =440 bits

256 subcarriers per symbol , 224 subcarriers used for data , 2 subcarriers for pilots.

FFT size =256.

I want to use constitutional coding.

I don't know how to start , and what to write in ofdm blocks (what to write in occupied carriers in ofdm transmitter for ex. , .. )

I don't know which blocks can be used & what to write in each field in the blocks.

And how to apply constitutional code , do I have to use specific block?!
I am new to Ubuntu & GNU.

I found in GNU folders , Python and c++ codes , I don't know if I have to change in any of these files? Do I have to read them to understand ?

Do I have to write a code to make a TX/RX block ? (As I need full duplex link)

Anyone can help me how to start??
As I installed GNU a month ago , I tried to read tutorials and search in doxygen , but till now , I am so confused & don't know how to fill the fields in the blocks!!

Thanks :)

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