ASR performance measurement

[drowe67]

Experimental way to evaluate performance of SSB versus RADE using automatic speech recognition.

1. SSB test with AWGN:

   ./asr_test.sh ssb --No -30 -n 100
   

2. RADE test with MPP channel:

   ./asr_test.sh rade --EbNodB 3 -n 10 --g_file g_mpp.f32
   

3. Listen to some of the files generated

   cd ~/.cache/LibriSpeech
   find test-other -name '*.flac'
   <play one of them>
   

4. Generate 500 seconds of multipath samples:

   Fs=8000; Rs=50; Nc=20; multipath_samples('mpp', Fs, Rs, Nc, 5000, '','g_mpp.f32');
   

5. Plotting some results:

   octave:3> radae_plots; plot_wer("241217_asr_awgn_ssb.txt", "241217_asr_awgn_rade.txt", "241217_asr_mpp_ssb.txt", "241217_asr_mpp_rade.txt")