diff options
Diffstat (limited to 'gr-trellis/src/examples/python/test_sccc_turbo.py')
| -rwxr-xr-x | gr-trellis/src/examples/python/test_sccc_turbo.py | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gr-trellis/src/examples/python/test_sccc_turbo.py b/gr-trellis/src/examples/python/test_sccc_turbo.py index 762a93ba51..979dfeca59 100755 --- a/gr-trellis/src/examples/python/test_sccc_turbo.py +++ b/gr-trellis/src/examples/python/test_sccc_turbo.py @@ -8,7 +8,11 @@ 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 make_rx(tb,fo,fi,dimensionality,constellation,K,interleaver,IT,Es,N0,type): metrics_in = trellis.metrics_f(fi.O(),dimensionality,constellation,digital.TRELLIS_EUCLIDEAN) # data preprocessing to generate metrics for innner Viterbi @@ -61,11 +65,11 @@ def run_test (fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation, enc_out = trellis.encoder_ss(fo,0) # initial state = 0 inter = trellis.permutation(interleaver.K(),interleaver.INTER(),1,gr.sizeof_short) enc_in = trellis.encoder_ss(fi,0) # initial state = 0 - mod = gr.chunks_to_symbols_sf(constellation,dimensionality) + mod = digital.chunks_to_symbols_sf(constellation,dimensionality) # 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 (head,tail) = make_rx(tb,fo,fi,dimensionality,constellation,K,interleaver,IT,Es,N0,trellis.TRELLIS_MIN_SUM) |