[Discuss-gnuradio] benchmark OFDM Question

[smith mark]

Hi everyone,

I am working on OFDM in gnuradio. I ran the benchmark_ofdm.py file. Everything worked well, I want to ask one thing that I didn't see the last packet on the terminal. 

I set the packet size to 400 bytes and total number of bytes to be transmitted to 1600. I should see 4 packets but i see only 3 packets. Where is the problem??

Portion of the code is given blelow:

--------------------------------------------------------------------------------

nbytes = int(1600 * 1) //line that I changed

n = 0

pktno = 0

pkt_size = int(400)  //line that I changed

while n < nbytes:

pkt_contents = struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff)

send_pkt(pkt_contents)

n += pkt_size

 pktno += 1

---------------------------------------------------------------------------------   

Output is shown below:

>>> gr_fir_ccf: using SSE

>>> gr_fir_ccc: using SSE

>>> gr_fir_fff: using SSE

ok: True pktno: 0 n_rcvd: 1 n_right: 1

0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

ok: True pktno: 1 n_rcvd: 2 n_right: 2

0101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101

ok: True pktno: 2 n_rcvd: 3 n_right: 3

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Why fourth packet is not sent ? Or if it is sent then why it is not displayed in the output. I am using gnuradio 3.3.0. Please help me in this.  

Regards

Smith