Hi!
I have been trying to use the packet communication examples under
gr-digital in GNURadio(v 3.7.14.0) on ubuntu machines with LimeSDR Mini
for over the air communication. I am using the usrp_packet_tx.grc and
uspr_packet_rx.grc to transmit and receive BPSK modulated packets
respectively. I have modified these examples for LimeSDR Mini by
including LimeSDR source and sink blocks and setting up the parameters.
Now, I am running TX on one machine and RX on another machine tuned to
same frequency. However, when I keep the gain values for RX low since
the distance between TX and RX is few feet and eliminating the
possibility of RX saturation, the packets are not being detected, while
for higher gain values packets get detected but the correlation start
tags are tagged before the position of estimation tags. I am not too
sure if that's how it is suppose to work.
Moreover, even after being detected the packets are not decoded and I
receive following message on console:
INFO: Parser returned #f
I think this is due to either incorrect header decoding or incorrect
packet detection which freezes the header/payload demux block in the
flowgraph. Also, even for very few packets that are decoded, the header
is incorrect so why does the packet even gets decoded? Is there a way to
work around this problem? Can we use some other block for packet detection?
Any suggestion or help is highly appreciated.
Thanks in anticipation
SG
