From 4580aaf9583b1e8ca4b3ef1d3127c7d48566fe67 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Fri, 28 Dec 2012 09:40:01 -0500
Subject: trellis: converted gr-trellis to new style.
---
gr-trellis/src/examples/python/test_sccc_turbo.py | 146 ----------------------
1 file changed, 146 deletions(-)
delete mode 100755 gr-trellis/src/examples/python/test_sccc_turbo.py
(limited to 'gr-trellis/src/examples/python/test_sccc_turbo.py')
diff --git a/gr-trellis/src/examples/python/test_sccc_turbo.py b/gr-trellis/src/examples/python/test_sccc_turbo.py
deleted file mode 100755
index 979dfeca59..0000000000
--- a/gr-trellis/src/examples/python/test_sccc_turbo.py
+++ /dev/null
@@ -1,146 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr
-from gnuradio import trellis, digital
-from gnuradio import eng_notation
-import math
-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
- scale = gr.multiply_const_ff(1.0/N0)
- gnd = gr.vector_source_f([0],True);
-
- inter=[]
- deinter=[]
- siso_in=[]
- siso_out=[]
-
- # generate all blocks
- for it in range(IT):
- inter.append( trellis.permutation(interleaver.K(),interleaver.INTER(),fi.I(),gr.sizeof_float) )
- siso_in.append( trellis.siso_f(fi,K,0,-1,True,False,type) )
- deinter.append( trellis.permutation(interleaver.K(),interleaver.DEINTER(),fi.I(),gr.sizeof_float) )
- if it < IT-1:
- siso_out.append( trellis.siso_f(fo,K,0,-1,False,True,type) )
- else:
- siso_out.append( trellis.viterbi_s(fo,K,0,-1) ) # no soft outputs needed
-
- # connect first stage
- tb.connect (gnd,inter[0])
- tb.connect (metrics_in,scale)
- tb.connect (scale,(siso_in[0],1))
-
- # connect the rest
- for it in range(IT):
- if it < IT-1:
- tb.connect (metrics_in,(siso_in[it+1],1))
- tb.connect (siso_in[it],deinter[it],(siso_out[it],1))
- tb.connect (gnd,(siso_out[it],0))
- tb.connect (siso_out[it],inter[it+1])
- tb.connect (inter[it],(siso_in[it],0))
- else:
- tb.connect (siso_in[it],deinter[it],siso_out[it])
- tb.connect (inter[it],(siso_in[it],0))
-
- return (metrics_in,siso_out[IT-1])
-
-
-def run_test (fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation,Es,N0,IT,seed):
- tb = gr.top_block ()
-
-
- # 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 = digital.chunks_to_symbols_sf(constellation,dimensionality)
-
- # CHANNEL
- add = gr.add_ff()
- 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)
- #(head,tail) = make_rx(tb,fo,fi,dimensionality,constellation,K,interleaver,IT,Es,N0,trellis.TRELLIS_SUM_PRODUCT)
- fsmi2s = gr.unpacked_to_packed_ss(bitspersymbol,gr.GR_MSB_FIRST) # pack FSM input symbols to shorts
- dst = gr.check_lfsr_32k_s()
-
- tb.connect (src,src_head,s2fsmi,enc_out,inter,enc_in,mod)
- tb.connect (mod,(add,0))
- tb.connect (noise,(add,1))
- tb.connect (add,head)
- tb.connect (tail,fsmi2s,dst)
-
- tb.run()
-
- #print enc_out.ST(), enc_in.ST()
-
- ntotal = dst.ntotal ()
- nright = dst.nright ()
- runlength = dst.runlength ()
- return (ntotal,ntotal-nright)
-
-
-def main(args):
- nargs = len (args)
- if nargs == 5:
- fname_out=args[0]
- fname_in=args[1]
- esn0_db=float(args[2]) # Es/No in dB
- IT=int(args[3])
- rep=int(args[4]) # number of times the experiment is run to collect enough errors
- else:
- sys.stderr.write ('usage: test_sccc_turbo.py fsm_name_out fsm_fname_in Es/No_db iterations 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,Es,N0,IT,-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)%10==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:])
--
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