Hi SangHyuk
On 16.03.2016 02:21, SangHyuk Kim wrote:
> Dear Nathan,
>
> I know QAM is the fastest modulation because it can carry more bits
> per symbol. This is a reason why I use QAM modulation.
>
> As bits per symbol level is higher, bit error rates will be increased.
> I expected it returns fe
Hi SangHyuk
On 16.03.2016 02:21, SangHyuk Kim wrote:
> Dear Nathan,
>
> I know QAM is the fastest modulation because it can carry more bits
> per symbol. This is a reason why I use QAM modulation.
>
> As bits per symbol level is higher, bit error rates will be increased.
> I expected it returns fe
Dear Nathan,
I know QAM is the fastest modulation because it can carry more bits per
symbol. This is a reason why I use QAM modulation.
As bits per symbol level is higher, bit error rates will be increased. I
expected it returns feasible error rate. However, error rates were too
high. So I wonder
There's been some subtle miscues in this thread. Let's start over from the
fundamentals.
First, think about what the flowgraph is. You must understand the transmit
and receive chains to do meaningful work with GNU Radio flowgraphs.
This is a rather old example of sending packetized data that does
Hi,
I missed that. Sorry :(
I tried to this example on ofdm one.
It shows more stable communication than narrowband one.
However, false rate still occur about 75 % (most of packet be corrupted)
I don't know why !
ADD)
OFDM benchmark example is different with narrowband one.
It use directly ba
Hi,
Sorry I'm late for reply
Did you use two device (Tx,Rx) at a time ?
I expect like these messages on Rx machine
ok = FALSE pktno = 1 n_rcvd = 1 n_right = 0
ok = FALSE pktno = 2 n_rcvd = 2 n_right = 0
ok = FALSE pktno = 3 n_rcvd = 3 n_right = 0
...
ok = TRUE pktno = N n_rcvd = N n
Hi,
Nope, as i told you, my x300 has only rx tuners :(
BR
Nikos
On Tue, Mar 15, 2016 at 4:13 AM, SangHyuk Kim wrote:
> Hi,
>
> Sorry I'm late for reply
>
> Did you use two device (Tx,Rx) at a time ?
>
> I expect like these messages on Rx machine
>
> ok = FALSE pktno = 1 n_rcvd = 1 n_right =
Hi,
Seems to me you have to tune in to a qam transmission to run your tests.
The difficulty is finding one in your area
BR,
Nikos
On Mon, Mar 14, 2016 at 4:05 AM, Nikos Balkanas wrote:
> Hi,
>
> The narrowband gave me nothing of statistics or your messages, just
> messages for connecting t
Dear, Nikos.
I want to check both of them.
Thanks!
2016-03-14 10:45 GMT+09:00 Nikos Balkanas :
> Hi Kim,
>
> I can only test the benchmark_rx.py with my X300 (don't have transmitters
> connected)
> I can find 2 benchmark_rx.py in my gnuradio-3.7.9.1:
> The first is under examples/ofdm and the o
Hi Kim,
I can only test the benchmark_rx.py with my X300 (don't have transmitters
connected)
I can find 2 benchmark_rx.py in my gnuradio-3.7.9.1:
The first is under examples/ofdm and the other under examples/narrowband
Which one do you need tested?
BR,
Nikos
On Mon, Mar 14, 2016 at 2:04 AM, Sang
Hi,
The narrowband gave me nothing of statistics or your messages, just
messages for connecting to x300 and RFNoC. Let it run for ~5':
No gain specified.
Setting gain to 18.75 (from [0.00, 37.50])
-- [0/Radio_0] _resolve_port_def()
-- [0/Radio_0] item type: sc16
-- [0/Radio_0] vector
Could anyone try to this example commend ?
example code location = gnuradio/gr-digital/example/narrowband
Tx)
./benchmark_tx.py -f 1.5G -m qam -S 8
Rx)
./benchmark_rx.py -f 1.5G -m qam -S 8
Thanks.
2016-03-13 18:57 GMT+09:00 SangHyuk Kim :
> Dear Nikos.
>
> the value 'ok' returns 'FALSE' as res
Dear Nikos.
the value 'ok' returns 'FALSE' as results of crc_check.
so, I think packet was corrupted.
It happened only some modulation using high bits per symbol (QAM, PSK)
Thanks
2016-03-13 18:41 GMT+09:00 Nikos Balkanas :
> Have you inspected the packets and verified them to be corrupt?
>
>
Have you inspected the packets and verified them to be corrupt?
BR
Nikos
On Sun, Mar 13, 2016 at 10:22 AM, SangHyuk Kim wrote:
> Hi all.
>
> I'm using benchmark_tx(rx).py example
>
> I experimented variety modulation schemes and GMSK, BPSK, QPSK modulation
> worked well
>
> However, when I use
Hi all.
I'm using benchmark_tx(rx).py example
I experimented variety modulation schemes and GMSK, BPSK, QPSK modulation
worked well
However, when I used QAM modulation, most of received packet were corrupted
(FALSE)
ENV)
both TX and RX uses USRP N210 with ANT500 and CBX 40MHz
distance between T
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