Re: [Discuss-gnuradio] gr-lte recorded files

[Johannes Demel]

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Hi Kevin,

this is only guesswork. Maybe occasional 'O's indicate overruns during
recording. This causes the flowgraph to loose sync. Maybe some
non-linearity causes it. Maybe the SNR is just not good enough. Maybe
frequency sync is off by an integer multiple and thus sync fails.

As far as I can tell your setup looks good.

Cheers
Johannes

On 29.12.2015 08:32, kevin_L wrote:
> Hi , johannes, thank you for your reply. I use the recorded samples
> from the matlab lte  system tools. It can decode the MIB
> successfully. But when i use the recorded samples from the usrp
> N210, ( I set the usrp N210 with the samp_rate =10M ,and connect to
> a resampler with the interpolation of 3072,the decimation of
> 1000,then connect to a file sink .) I use the file sink as the
> input of the "lte_top_block_siso",I set the samp_rate of the
> flowgraph to 30.72M,fft_len =2048 .N_rb_dl=50, but the results
> shows "ofdm_lte_remove_cp_cvc_0 OUT of sync" so where the problem
> locates?
> 
> 
> 
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