diff options
Diffstat (limited to 'gr-trellis/src/examples/python/test_tcm_parallel.py')
| -rwxr-xr-x | gr-trellis/src/examples/python/test_tcm_parallel.py | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gr-trellis/src/examples/python/test_tcm_parallel.py b/gr-trellis/src/examples/python/test_tcm_parallel.py index 0372351aad..1767cc730f 100755 --- a/gr-trellis/src/examples/python/test_tcm_parallel.py +++ b/gr-trellis/src/examples/python/test_tcm_parallel.py @@ -9,6 +9,11 @@ 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,P): tb = gr.top_block () @@ -19,14 +24,14 @@ def run_test (f,Kb,bitspersymbol,K,dimensionality,constellation,N0,seed,P): s2fsmi=gr.packed_to_unpacked_ss(bitspersymbol,gr.GR_MSB_FIRST) # unpack shorts to symbols compatible with the FSM input cardinality s2p = gr.stream_to_streams(gr.sizeof_short,P) # serial to parallel enc = trellis.encoder_ss(f,0) # initiali state = 0 - mod = gr.chunks_to_symbols_sf(constellation,dimensionality) + mod = digital.chunks_to_symbols_sf(constellation,dimensionality) # CHANNEL add=[] noise=[] for i in range(P): add.append(gr.add_ff()) - noise.append(gr.noise_source_f(gr.GR_GAUSSIAN,math.sqrt(N0/2),seed)) + noise.append(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 |