Re: [Discuss-gnuradio] Re channel state information on rx_ofdm.grc

[Marcus Müller]

Hi Avinash,

when you attach a "tag debug" after the "ofdm channel estimation" block, you'll see stream tags containing CSI estimates flying by.
For more information on stream tags and how to handle them, I'd refer you to the Guided Tutorials [1], chapter 1-5.

Best regards,
Marcus
[1] http://tutorials.gnuradio.org

On 06/15/2016 06:25 PM, avinash kalyanaraman wrote:

Hello all,

Could you please let me know how I can get channel-frequency response (like channel state information (CSI) ) for an OFDM transmission? I am looking at rx_ofdm.grc to capture the phase and amplitude at each of the 64 sub-carriers. 

Would connecting the OFDM Channel Estimation Block of the HeaderStream to a FileSink such that item_size is fft_size* gr.sizeof_gr_complex , give me enough information to capture the CSI ?

 What would be the granularity of the aforementioned calculation?

I transmit using tx_ofdm.grc.

Please let me know.

Thanks! 

--

Avinash 

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