Thank you Barry. Trying to follow your example. Here are 2 issues I
encountered, will be glad if you can have a look:
In the Tx, the flow seems to be running, but I don't see any signal, and
also I get the following error message:
handler caught exception: in method 'init_u8vector', argument 2 of type
'std::vector< uint8_t,std::allocator< uint8_t > > const &'
Traceback (most recent call last):
File "/usr/local/lib/python3/dist-packages/gnuradio/gr/gateway.py", line
78, in eval
try: self._callback(arg)
File "/home/.../epy_block_0.py", line 37, in handle_msg
self.message_port_pub(pmt.intern('PDU_out'),
pmt.cons(pmt.PMT_NIL,pmt.init_u8vector(out_len,(char_list))))
File "/usr/local/lib/python3/dist-packages/pmt/pmt_swig.py", line 2775,
in init_u8vector
return _pmt_swig.init_u8vector(k, data)
TypeError: in method 'init_u8vector', argument 2 of type 'std::vector<
uint8_t,std::allocator< uint8_t > > const &'
thread[thread-per-block[11]: <block Packet Format(3)>]: SWIG director
method error. Error detected when calling 'feval_p.eval'
do you know what could it mean?
In the Rx, since I'm using GNURadio 3.8, I replaced the Adaptive Algorithm
block with the CMA Equalizer block, and I'm wondering, should I also add a
Polyphase clock sync block before it?
Thank you,
Evgeny
On Thu, Nov 4, 2021 at 2:09 AM Barry Duggan <ba...@dcsmail.net> wrote:
> Hi Evgeny,
>
> Recently I wrote a tutorial on
> https://wiki.gnuradio.org/index.php/Packet_Communications which should
> give you a basic understanding. Be sure to study the Prerequisites first!
> I did find that the examples did not work "out of the box".
>
> Good luck.
> ---
> Barry Duggan KV4FV
> https://github.com/duggabe
>
> On Tue, 2 Nov 2021 18:12:10 +0200, Evgeny Hahamovich wrote:
>
> Hi all,
>
> I am interested to learn how to use the Packet Communications concept, and
> hope to get your advice. I am trying to start with some QPSK or something
> similar, based on the packet_tx & packet_rx examples, but getting lost
> along the way...
>
> Can you maybe guide me to something basic I can use to start? Getting
> totally lost with this :(
> Especially with all the header parameters I should set up...
>
>
> Thank you,
> Evgeny
>
>
>
