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Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API
From: |
Tom Tsou |
Subject: |
Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API |
Date: |
Thu, 19 Dec 2013 13:33:56 -0500 |
On Thu, Dec 19, 2013 at 12:55 PM, Johannes Demel
<address@hidden> 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
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, (continued)
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Marcus Müller, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Johnathan Corgan, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Marcus Müller, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Baier, 2013/12/20
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Johannes Demel, 2013/12/20
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Ralph A. Schmid, dk5ras, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Johannes Demel, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API,
Tom Tsou <=
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Johannes Demel, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Tom Tsou, 2013/12/19
- Re: [Discuss-gnuradio] gr-lte updated to GNU Radio 3.7 API, Ralph A. Schmid, dk5ras, 2013/12/19