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Re: [Discuss-gnuradio] ofdm_chanest_vcvc_impl.cc

From: zs
Subject: Re: [Discuss-gnuradio] ofdm_chanest_vcvc_impl.cc
Date: Sun, 25 Jan 2015 15:10:39 +0800 (CST)

Hi Martin:
                Thank you for your reply.And we know this block do "Estimate channel and coarse frequency offset for OFDM from preambles".And the coarse frequency offset is a integer.And it make the subcarriers cyclic shift.Just illustration as this:
                For example,we have 5 subcarriers,cfo=2.
                Right subcarriers:s1,s2,s3,s4,s5
                Wrong subcarriers:s4,s5,s1,s2,s3
So the channel estimation coefficients will not be zeros.Is it right?
Best regards,

At 2015-01-25 03:38:38, "Martin Braun" <address@hidden> wrote: >On 01/24/2015 08:43 AM, zs wrote: >> Now the taps only have values on taps[0]---taps[63-2],and taps[62] >> taps[63] will be equal to zero.It means that the channel estimation have >> value 0.It is wrong? > >They will be zero, and it's not wrong. What else should be written here? >There's no useful information outside the frame. > >M > > >_______________________________________________ >Discuss-gnuradio mailing list >address@hidden >https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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