diff options
Diffstat (limited to 'gr-trellis/src/examples/python/test_viterbi_equalization1.py')
| -rwxr-xr-x | gr-trellis/src/examples/python/test_viterbi_equalization1.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gr-trellis/src/examples/python/test_viterbi_equalization1.py b/gr-trellis/src/examples/python/test_viterbi_equalization1.py index cb000d6852..4421e370a4 100755 --- a/gr-trellis/src/examples/python/test_viterbi_equalization1.py +++ b/gr-trellis/src/examples/python/test_viterbi_equalization1.py @@ -8,6 +8,12 @@ import sys import random import fsm_utils +try: + from gnuradio import analog +except ImportError: + sys.stderr.write("Error: Program requires gr-analog.\n") + sys.exit(1) + def run_test (f,Kb,bitspersymbol,K,channel,modulation,dimensionality,tot_constellation,N0,seed): tb = gr.top_block () L = len(channel) @@ -27,7 +33,7 @@ def run_test (f,Kb,bitspersymbol,K,channel,modulation,dimensionality,tot_constel # CHANNEL isi = filter.fir_filter_fff(1,channel) add = gr.add_ff() - noise = gr.noise_source_f(gr.GR_GAUSSIAN,math.sqrt(N0/2),seed) + noise = analog.noise_source_f(analog.GR_GAUSSIAN,math.sqrt(N0/2),seed) # RX skip = gr.skiphead(gr.sizeof_float, L) # skip the first L samples since you know they are coming from the L zero symbols |