Considering the GNURadio provided OFDM implementaiton is not so robust,
and
my test shows its limited performance (supporting bandwidth, packet loss
rate, etc.), I would like to port the hydra to USRP2. Hydra claims that
they support up to 5.4Mbps for SISO OFDM. But I am not sure anyone has
verified it in your platform? I am concerned with the computing
capability
of the host-pc. Can it really support so high data rate running the
hydra+GNURadio. My computer is i7 4Core @3.4GHz.
I would assume GNUradio’s OFDM is mathematically identical to Hydra,
have you tired finding what settings ( Channel spacing, FFT size,
Number of sub-carriers, Sub-carrier modulation scheme, symbol length,
guard interval, Sub-carrier spacing, and FEC ) hydra uses and setting
GnuRadio to that. It should yield identical throughput.
I only have one USRP, and I believe only like 2% of people here have
more than one for that kind of testing, so there’s not many here with
answers in this case. I saw you last thread and felt bad no one knew
the answer. Although I believe the answer could be derived from the
available bandwidth and noise.
Thanks Andrew, i will try to manually adjust these parameters to find
the
optimized performance.
But before that, I really want to know any existing benchmark on
the performance over this GNURadio OFDM.
For example, on what kind of host-pc, what kind data rate have you
reached,
with how much packet loss rate?