Re: [Discuss-gnuradio] Viterbi--OFDM

[Achilleas Anastasopoulos]

My guess is that the inner channel (ie the combination of OFDM 
modulator/channel/OFDM demodulator) is producing big bursts of errors.
Essentially either the packet is correctly received or completely 
erroneously received.
In that case the outer Convolutional code cannot do much; on the 
contrary it deteriorates performance because of the SNR loss due to coding.
One way to verify this hypothesis is to measure the error statistics of 
the inner channel.

The way to improve is to interleave before the inner channel with 
sufficient depth (multiple OFDM symbols).

Achilleas