diff options
Diffstat (limited to 'gr-trellis/src/examples/python/test_tcm.py')
| -rwxr-xr-x | gr-trellis/src/examples/python/test_tcm.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gr-trellis/src/examples/python/test_tcm.py b/gr-trellis/src/examples/python/test_tcm.py index eff93f5b4e..fced315260 100755 --- a/gr-trellis/src/examples/python/test_tcm.py +++ b/gr-trellis/src/examples/python/test_tcm.py @@ -10,6 +10,12 @@ import fsm_utils from gnuradio.eng_option import eng_option from optparse import OptionParser +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,dimensionality,constellation,N0,seed): tb = gr.top_block () @@ -28,7 +34,7 @@ def run_test (f,Kb,bitspersymbol,K,dimensionality,constellation,N0,seed): # 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 metrics = trellis.metrics_f(f.O(),dimensionality,constellation,digital.TRELLIS_EUCLIDEAN) # data preprocessing to generate metrics for Viterbi |