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_tcm_bit.py | 134 -------------------------
1 file changed, 134 deletions(-)
delete mode 100755 gr-trellis/src/examples/python/test_tcm_bit.py
(limited to 'gr-trellis/src/examples/python/test_tcm_bit.py')
diff --git a/gr-trellis/src/examples/python/test_tcm_bit.py b/gr-trellis/src/examples/python/test_tcm_bit.py
deleted file mode 100755
index 873d58684b..0000000000
--- a/gr-trellis/src/examples/python/test_tcm_bit.py
+++ /dev/null
@@ -1,134 +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
-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):
- tb = gr.top_block ()
-
- # TX
- packet = [0]*Kb
- # this for loop is TOO slow!!!
- for i in range(Kb-1*16): # last 16 bits = 0 to drive the final state to 0
- packet[i] = random.randint(0, 1) # random 0s and 1s
- src = gr.vector_source_s(packet,False)
- #src = gr.lfsr_32k_source_s()
- #src_head = gr.head (gr.sizeof_short,Kb/16) # packet size in shorts
- b2s = gr.unpacked_to_packed_ss(1,gr.GR_MSB_FIRST) # pack bits in shorts
- s2fsmi = gr.packed_to_unpacked_ss(bitspersymbol,gr.GR_MSB_FIRST) # unpack shorts to symbols compatible with the FSM input cardinality
- enc = trellis.encoder_ss(f,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
- metrics = trellis.metrics_f(f.O(),dimensionality,constellation,digital.TRELLIS_EUCLIDEAN) # data preprocessing to generate metrics for Viterbi
- va = trellis.viterbi_s(f,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
- s2b = gr.packed_to_unpacked_ss(1,gr.GR_MSB_FIRST) # unpack shorts to bits
- dst = gr.vector_sink_s();
- #dst = gr.check_lfsr_32k_s();
-
-
- #tb.connect (src,src_head,s2fsmi,enc,mod)
- tb.connect (src,b2s,s2fsmi,enc,mod)
- tb.connect (mod,(add,0))
- tb.connect (noise,(add,1))
- tb.connect (add,metrics)
- #tb.connect (metrics,va,fsmi2s,dst)
- tb.connect (metrics,va,fsmi2s,s2b,dst)
-
-
- tb.run()
-
- # A bit of cheating: run the program once and print the
- # final encoder state..
- # Then put it as the last argument in the viterbi block
- #print "final state = " , enc.ST()
-
- #ntotal = dst.ntotal ()
- #nright = dst.nright ()
- #runlength = dst.runlength ()
- ntotal = len(packet)
- if len(dst.data()) != ntotal:
- print "Error: not enough data\n"
- nright = 0;
- # this for loop is TOO slow!!!
- for i in range(ntotal):
- if packet[i]==dst.data()[i]:
- nright=nright+1
- #else:
- #print "Error in ", i
- return (ntotal,ntotal-nright)
-
-
-
-
-def main():
- parser = OptionParser(option_class=eng_option)
- parser.add_option("-f", "--fsm_file", type="string", default="fsm_files/awgn1o2_4.fsm", help="Filename containing the fsm specification, e.g. -f fsm_files/awgn1o2_4.fsm (default=fsm_files/awgn1o2_4.fsm)")
- parser.add_option("-e", "--esn0", type="eng_float", default=10.0, help="Symbol energy to noise PSD level ratio in dB, e.g., -e 10.0 (default=10.0)")
- parser.add_option("-r", "--repetitions", type="int", default=100, help="Number of packets to be generated for the simulation, e.g., -r 100 (default=100)")
-
- (options, args) = parser.parse_args ()
- if len(args) != 0:
- parser.print_help()
- raise SystemExit, 1
-
- fname=options.fsm_file
- esn0_db=float(options.esn0)
- rep=int(options.repetitions)
-
-
- # system parameters
- f=trellis.fsm(fname) # get the FSM specification from a file
- Kb=1024*16 # packet size in bits (make it multiple of 16 so it can be packed in a short)
- bitspersymbol = int(round(math.log(f.I())/math.log(2))) # bits per FSM input symbol
- K=Kb/bitspersymbol # packet size in trellis steps
- modulation = fsm_utils.psk4 # see fsm_utlis.py for available predefined modulations
- dimensionality = modulation[0]
- constellation = modulation[1]
- if len(constellation)/dimensionality != f.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(f,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)%1==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()
--
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