Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-examples / python / channel-coding / test_sccc_hard.py

diff --git a/gnuradio-examples/python/channel-coding/test_sccc_hard.py b/gnuradio-examples/python/channel-coding/test_sccc_hard.py
deleted file mode 100755 (executable)
index d634282..0000000
--- a/gnuradio-examples/python/channel-coding/test_sccc_hard.py
+++ /dev/null
@@ -1,101 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr
-from gnuradio import audio
-from gnuradio import trellis
-from gnuradio import eng_notation
-import math
-import sys
-import random
-import fsm_utils
-
-def run_test (fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation,N0,seed):
-    fg = gr.flow_graph ()
-
-
-    # TX
-    src = gr.lfsr_32k_source_s()
-    src_head = gr.head (gr.sizeof_short,Kb/16) # packet size in shorts
-    s2fsmi = gr.packed_to_unpacked_ss(bitspersymbol,gr.GR_MSB_FIRST) # unpack shorts to symbols compatible with the outer FSM input cardinality
-    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)
-
-    # CHANNEL
-    add = gr.add_ff()
-    noise = gr.noise_source_f(gr.GR_GAUSSIAN,math.sqrt(N0/2),seed)
-
-    # RX
-    metrics_in = trellis.metrics_f(fi.O(),dimensionality,constellation,trellis.TRELLIS_EUCLIDEAN) # data preprocessing to generate metrics for innner Viterbi
-    va_in = trellis.viterbi_s(fi,K,0,-1) # Put -1 if the Initial/Final states are not set.
-    deinter = trellis.permutation(interleaver.K(),interleaver.DEINTER(),1,gr.sizeof_short)
-    metrics_out = trellis.metrics_s(fo.O(),1,[0,1,2,3],trellis.TRELLIS_HARD_SYMBOL) # data preprocessing to generate metrics for outer Viterbi (hard decisions)
-    va_out = trellis.viterbi_s(fo,K,0,-1) # Put -1 if the Initial/Final states are not set.
-    fsmi2s = gr.unpacked_to_packed_ss(bitspersymbol,gr.GR_MSB_FIRST) # pack FSM input symbols to shorts
-    dst = gr.check_lfsr_32k_s()
-    
-    fg.connect (src,src_head,s2fsmi,enc_out,inter,enc_in,mod)
-    fg.connect (mod,(add,0))
-    fg.connect (noise,(add,1))
-    fg.connect (add,metrics_in)
-    fg.connect (metrics_in,va_in,deinter,metrics_out,va_out,fsmi2s,dst)
-
-    fg.run()
-    
-    ntotal = dst.ntotal ()
-    nright = dst.nright ()
-    runlength = dst.runlength ()
-    return (ntotal,ntotal-nright)
-
-
-def main(args):
-    nargs = len (args)
-    if nargs == 4:
-        fname_out=args[0]
-        fname_in=args[1]
-        esn0_db=float(args[2]) # Es/No in dB
-        rep=int(args[3]) # number of times the experiment is run to collect enough errors
-    else:
-        sys.stderr.write ('usage: test_tcm.py fsm_name_out fsm_fname_in Es/No_db  repetitions\n')
-        sys.exit (1)
-
-    # system parameters
-    Kb=1024*16  # packet size in bits (make it multiple of 16 so it can be packed in a short)
-    fo=trellis.fsm(fname_out) # get the outer FSM specification from a file
-    fi=trellis.fsm(fname_in) # get the innner FSM specification from a file
-    bitspersymbol = int(round(math.log(fo.I())/math.log(2))) # bits per FSM input symbol
-    if fo.O() != fi.I():
-        sys.stderr.write ('Incompatible cardinality between outer and inner FSM.\n')
-        sys.exit (1)
-    K=Kb/bitspersymbol # packet size in trellis steps
-    interleaver=trellis.interleaver(K,666) # construct a random interleaver
-    modulation = fsm_utils.psk8 # see fsm_utlis.py for available predefined modulations
-    dimensionality = modulation[0]
-    constellation = modulation[1] 
-    if len(constellation)/dimensionality != fi.O():
-        sys.stderr.write ('Incompatible FSM output cardinality and modulation size.\n')
-        sys.exit (1)
-    # calculate average symbol energy
-    Es = 0
-    for i in range(len(constellation)):
-        Es = Es + constellation[i]**2
-    Es = Es / (len(constellation)/dimensionality)
-    N0=Es/pow(10.0,esn0_db/10.0); # calculate noise variance
-    
-    tot_s=0 # total number of transmitted shorts
-    terr_s=0 # total number of shorts in error
-    terr_p=0 # total number of packets in error
-    for i in range(rep):
-        (s,e)=run_test(fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation,N0,-long(666+i)) # run experiment with different seed to get different noise realizations
-        tot_s=tot_s+s
-        terr_s=terr_s+e
-        terr_p=terr_p+(terr_s!=0)
-        if ((i+1)%100==0) : # display progress
-            print i+1,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
-    # estimate of the (short or bit) error rate
-    print rep,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
-
-
-if __name__ == '__main__':
-    main (sys.argv[1:])