The short answer is that to receive very weak signals, you want to
decimate LESS in the FPGA since it is fixed-point. Then do more
decimation in your software on the host computer in floating point.
Your optimal performance will come with a decimation of 4 in the USRP2,
and all further decim
Matt,
Thank you for your reply.
Actually, I repeated the experiment again with a HP signal generator to find
that it happens when the signal level was not quite much low( I don't
remember the number.). Since I don't remember the exact level that the
simptom appears, I will do the experiment again
Kris Lists wrote:
>
>
> I then build a basic flow in python from the sample file to a USRP2
> sink setting the center frequency CF to 1.57542G, and a interpolation
> of 20 to convert the 5Msamp/sec to 100Msamp/sec. The waveform
> transmits for the expected 60 sec.
>
Not sure, but as far as I can r
Hi,
Does any one know how does ofdm in gnuradio do sync?
What I found in the gr_ofdm_frame_sink.cc is just check sig[0], which
is just the second bytes of input_items. However, I didn't see any reason
that the (const char *) input_items[1] will be NULL.
Thanks,
Bin Zan
Hi,
I had an "Error calling tune on subdevice" in the RX 750-1050 daughterboard
while I was running "usrp_two_tone_loopback" in GRC. It was working
successfully but I touched my SMA Antenna and suddendly it began to fail and
when I tried to restart the program, the system gave me this error. I gue
Hello @ all
Sorry for the bad question!
I'm trying to create a simple block with GRC, but i don't know how to do
this. I want to transmit noise on a specific frequency but only on a
range of +- 1MHz.
..
..
Fatih
The fm receiver demo will work when you use a TVRX daughterboard. You
can use a BasicRX daughterboard, but then you would have to use an
analogue filter to prevent aliasing and you would also need to read up
on bandpass sampling to figure out where your frequency of interest
would end up af
Hi,
We bought a new USRP motherboard with several daugtherboards. I'
totally a newbie. Our current Daugtherboards are:
LFRX - LF
LFTX - LF
DBSRX -LF
TVRX
Now, if we try to run the script ./usrp_wfm_rcv.py we get the error:
Using RX d'board A: LF Rx
This daughterboard does not cover the require
