From be8e888f80934a884287f0ec9eb62dd0d2b7f5e5 Mon Sep 17 00:00:00 2001
From: Achilleas Anastasopoulos <anastas@umich.edu>
Date: Wed, 1 Oct 2014 18:22:53 -0400
Subject: Updated documentation and grc/python examples in gr-trellis. Removed
weird pyhton examples and made them grc files.
---
gr-trellis/examples/python/test_pccc_turbo1.py | 124 -------------------------
1 file changed, 124 deletions(-)
delete mode 100755 gr-trellis/examples/python/test_pccc_turbo1.py
(limited to 'gr-trellis/examples/python/test_pccc_turbo1.py')
diff --git a/gr-trellis/examples/python/test_pccc_turbo1.py b/gr-trellis/examples/python/test_pccc_turbo1.py
deleted file mode 100755
index 7104aa5039..0000000000
--- a/gr-trellis/examples/python/test_pccc_turbo1.py
+++ /dev/null
@@ -1,124 +0,0 @@
-#!/usr/bin/env python
-
-from gnuradio import gr
-from gnuradio import trellis, digital, blocks
-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 run_test (fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation,Es,N0,IT,seed):
- tb = gr.top_block ()
-
-
- # TX
- src = blocks.lfsr_32k_source_s()
- src_head = blocks.head (gr.sizeof_short,Kb/16) # packet size in shorts
- s2fsmi = blocks.packed_to_unpacked_ss(bitspersymbol,gr.GR_MSB_FIRST) # unpack shorts to symbols compatible with the outer FSM input cardinality
- #src = blocks.vector_source_s([0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1],False)
- enc = trellis.pccc_encoder_ss(fo,0,fi,0,interleaver,K)
- code = blocks.vector_sink_s()
- mod = digital.chunks_to_symbols_sf(constellation,dimensionality)
-
- # CHANNEL
- add = blocks.add_ff()
- noise = analog.noise_source_f(analog.GR_GAUSSIAN,math.sqrt(N0/2),seed)
-
- # RX
- metrics_in = trellis.metrics_f(fi.O()*fo.O(),dimensionality,constellation,digital.TRELLIS_EUCLIDEAN) # data preprocessing to generate metrics for innner SISO
- scale = blocks.multiply_const_ff(1.0/N0)
- dec = trellis.pccc_decoder_s(fo,0,-1,fi,0,-1,interleaver,K,IT,trellis.TRELLIS_MIN_SUM)
-
- fsmi2s = blocks.unpacked_to_packed_ss(bitspersymbol,gr.GR_MSB_FIRST) # pack FSM input symbols to shorts
- dst = blocks.check_lfsr_32k_s()
-
- tb.connect (src,src_head,s2fsmi,enc,mod)
- #tb.connect (src,enc,mod)
- #tb.connect(enc,code)
- tb.connect (mod,(add,0))
- tb.connect (noise,(add,1))
- tb.connect (add,metrics_in,scale,dec,fsmi2s,dst)
-
- tb.run()
-
- #print code.data()
-
- 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_pccc_turbo.py fsm_name_1 fsm_fname_2 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.I() != fi.I():
- sys.stderr.write ('Incompatible input cardinality between two FSMs.\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 = 4
- constellation = [ 1, 0, 1, 0,\
- 1, 0,-1, 0,\
- 1, 0, 0, 1,\
- 1, 0, 0,-1,\
- -1, 0, 1, 0,\
- -1, 0,-1, 0,\
- -1, 0, 0, 1,\
- -1, 0, 0,-1,\
- 0, 1, 1, 0,\
- 0, 1,-1, 0,\
- 0, 1, 0, 1,\
- 0, 1, 0,-1,\
- 0,-1, 1, 0,\
- 0,-1,-1, 0,\
- 0,-1, 0, 1,\
- 0,-1, 0,-1,] # equivalent to 2 QPSK symbols
- if len(constellation)/dimensionality != fi.O()*fo.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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