[Discuss-gnuradio] packet sending part

[SangHyuk Kim]

Hi,

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.

I tried to change queue limit from 4 to 0 (non-blocking) and it caused down my computer (maybe memory problem)

In this point, I'm wondering which part calls ofdm_mapper_bcv_impl ?

In other words, where is actual packet transmitting part ?

Thanks.