Re: [Discuss-gnuradio] OFDM Transmitter and Receiver - poor synchronization with USRP1

[Michal Vaclík]

Doesn't seem so - by connecting scope to DETECT port on S&C block I can see only randomly timed peeks as opposed to running with channel model where the peeks happen at fixed time periods.

Detection seems to get better with higher sample rates.

2015-05-09 23:25 GMT+02:00 Martin Braun <address@hidden>:

Is the detection working reliably?

M

On 09.05.2015 14:11, Michal Vaclík wrote:
> Hi,
> I am trying to implement OFDM transmitter and receiver (both in one
> flowgraph) using 2 USRP1s (both equipped with WBX). I have adjusted the
> signal so there's no peak above 1 and -1, but I am still failing at
> syncrhonization. I used exmaples mentioned in Martin Braun's talk at
> FOSDEM 14 which are now available in digital/ofdm/ folder.
>
> Running the flowgraph without USRPs seems to be fine at lower sample
> rates (~125k), but I am struggling at adjusting sample rates for USRP1
> which cannot go lower than 250k. I have noticed syncrhonization being
> much better at high sample rates (2-4M).
>
> Are there any guides on how to achieve better synchronization with two
> USRP1s?
>
> Thanks in advance.
> Michal
>
>

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