About benchmark in USRP E110

Dear all:
Now, I am running the benchmark_tx.py and benchmark_rx.py on the USRP
E110s. However, even if I set the bit rate to 100khz and use bpsk
modulation scheme, overflow always occure. I get some information that
benchmark examples now can not work well in the USRP E110. So,is there
some onerun benchmakr examples well in the E110 or is there some
suggestion to solve this overflow problem.

Now I am using UHD 003.004.000 and GNU radio 3.5.0.
Any help would be appreacited and thanks a lot in advance!!

Best regards

Zan

On 07/28/2012 04:37 AM, wrote:

Dear all: Now, I am running the benchmark_tx.py and benchmark_rx.py
on the USRP E110s. However, even if I set the bit rate to 100khz and
use bpsk modulation scheme, overflow always occure. I get some
information that benchmark examples now can not work well in the USRP
E110. So, is there some one run benchmakr examples well in the E110
or is there some suggestion to solve this overflow problem.

Well I suspect the bandedge fll in the bpsk chains takes up a little too
much juice. I might suggest experimenting with the gmsk chains.

Anyway, this is expected. benchmark is an example of implementing a mac
layer w/ gnuradio in python. But its not going to yield continuous
high-rate throughput.

When you code up your application, I suggest making heavy use of the
neon SIMD. :slight_smile:

-josh

On 07/29/2012 06:21 PM, Josh B. wrote:

Well I suspect the bandedge fll in the bpsk chains takes up a little too
much juice. I might suggest experimenting with the gmsk chains.

Anyway, this is expected. benchmark is an example of implementing a mac
layer w/ gnuradio in python. But its not going to yield continuous
high-rate throughput.

When you code up your application, I suggest making heavy use of the
neon SIMD. :slight_smile:

I keep begging people to re-implement the benchmark_{tx,rx} flowgraphs
using grac and real gnuradio blocks. Once you start digging into the
code, you find it is really difficult to work out how and where to
optimize the key functions.

Philip

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