On Thu, Dec 19, 2013 at 12:55 PM, Johannes Demel <johannes.de...@ettus.com> wrote: > Technically it could work with life data. Unfortunately it creates a too > heavy load to be processed in realtime, unless you have the computing power > or reduce the bandwidth/fft length to a small value. But then you are > probably not able to decode more than the PBCH.
It's certainly possible, and advisable, to downsample from a full LTE capturing bandwidth to a more manageable rate of 1.92 Msps or 960 ksps. The latter can be handled very efficiently for initial acquisition, though the cyclic prefix length becomes fractional, which is annoying to handle. In either case, the complexity of the downsampling is mainly dictated by the output rate of the resampler. Done efficiently, even a small processor can handle PBCH decoding from a relatively high capture sample rate. Though, this would require a rather substantial change from the gr-lte synchronization approach and overall structure. -TT _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
