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[Discuss-gnuradio] Frequency response from fading simulator block not wo

From: Ricardo Yoshimura
Subject: [Discuss-gnuradio] Frequency response from fading simulator block not working as expected
Date: Fri, 28 Feb 2014 10:13:10 -0300


In order to simulate a multi-path scenario, I´m trying to validate the "Frequency Selective Fading Model" block, but the results I found are not the ones I would expect.
The set up consisted of 2 taps delayed 20 microseconds each other, so that the frequency response should have very deep fadings spaced regularly in frequency. The results I got showed a flat frequency response, as well as in other standardized power delay profile scenarios.
The blocks I used were a random source -> OFDM Mod -> Throttle -> Frequency Selective Fading Model -> WX GUI FFT Sink. Sample rate was set as 1MHz, so that in Freq. Selective block I set PDP Delays as [0, 20] and PDP Magnitudes as [1, 1].
Please tell me if I misunderstood any of these parameters or this block could be really improved.

Thanks and Regards,

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