I'm trying to understand how OFDM packet Tx working
I checked Tx rate and I got a poor rate
(qam16, freq 1.18GHz, BW 25 MHz, pkt_size 400 --> 4.0 Mbps)
I found it's because msg_queue block when packet be inserted to tail
When Tx calls 'send_pkt(payload, ..)', it make packet and insert to tail of msg_queue.
And delete_head is called by ofdm_mapper_bcv_impl::work.