On 02/28/2014 02:13 PM, Ricardo Yoshimura wrote: > 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.
Did you increase the number of taps? Also, note that this block provides a time-variant channel. If you average, you might not see fades. For a static channel, use the "Channel Model". If you use the default settings, you should see fades, right? M _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
