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,
zswx
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,
zswx
At 2015-01-25 03:38:38, "Martin Braun" <martin.braun@ettus.com> 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 >Discuss-gnuradio@gnu.org >https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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