[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss-gnuradio] OFDM channel estimation

From: Andreas Weinand
Subject: [Discuss-gnuradio] OFDM channel estimation
Date: Tue, 4 Oct 2016 15:25:26 +0200
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0


i'm currently dealing with OFDM channel estimation and try to read out the estimated values for this purpose. It works when i take the ones that are given by the tag debug block (Key: ofdm_sync_chan_taps). But somehow the values look a bit strange to me. Can anybody explain why there are some carriers in the upper frequency range that are not allocated, although they should be (see the plotted values). I did not change the number of active subcarrier which is 48. So carriers should be allocated up to carrier 59. I have used N210 USRPs und SBX daughterboards to get these values, but the same thing happens when i run the ofdm receiver in a simulation. The magnitude of these upper carriers is still approx. 1 Decade below the magnitude of the other active carriers in that case like in the OTA setup. Can anybody help with this problem?

Best regards
Andreas Weinand

Attachment: OFDM_channel_estimation_mag.png
Description: PNG image

reply via email to

[Prev in Thread] Current Thread [Next in Thread]