diff options
Diffstat (limited to 'viterbi_generator/utils/lower_utils')
5 files changed, 310 insertions, 0 deletions
diff --git a/viterbi_generator/utils/lower_utils/equations_gen.m b/viterbi_generator/utils/lower_utils/equations_gen.m new file mode 100644 index 0000000..af7d37e --- /dev/null +++ b/viterbi_generator/utils/lower_utils/equations_gen.m @@ -0,0 +1,124 @@ +function [increment, pm_candidates_imag, pm_candidates_real]= equations_gen(Lh) + + ########################################################################### + # Copyright (C) 2008 by Piotr Krysik # + # pkrysik@stud.elka.pw.edu.pl # + # # + # This program is free software; you can redistribute it and/or modify # + # it under the terms of the GNU General Public License as published by # + # the Free Software Foundation; either version 3 of the License, or # + # (at your option) any later version. # + # # + # This program is distributed in the hope that it will be useful, # + # but WITHOUT ANY WARRANTY; without even the implied warranty of # + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # + # GNU General Public License for more details. # + # # + # You should have received a copy of the GNU General Public License # + # along with this program; if not, write to the # + # Free Software Foundation, Inc., # + # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # + ########################################################################### + +INCREMENT_NUM=2**(Lh-1); + +SYMBOLS = make_symbols(Lh); +PREVIOUS = generate_previous(Lh); + +load tests/data/rhh.dat + +[INCREMENT NUMBERS] = generate_increment(SYMBOLS,PREVIOUS); + +function_real="real"; +function_imag="imag"; +sign=""; +fction=""; +equation_num=""; +increment = { }; +equation=""; + +for equation_num=1:INCREMENT_NUM, + for part_num=1:Lh, + coefficient=INCREMENT(equation_num,part_num); + if(coefficient==1 || coefficient==-1), + fction=function_real; + else + fction=function_imag; + coefficient=coefficient*j; + end + + if(coefficient==1 && part_num != 1), + sign="+"; + elseif(coefficient==-1), + sign="-"; + else + sign=""; + end + + equation = [equation " " sign "rhh[" int2str(part_num) "]." fction "()" ]; + end + + increment(equation_num) = ["increment[" int2str(equation_num-1) "] =" equation]; + equation=""; +end + + +BRANCH_NUM=2**(Lh+1); + + +%make path metrics +pm_candidates_real={}; +pm_candidates_imag={}; +for symbol_num=1:BRANCH_NUM, + + inc1_num=NUMBERS(PREVIOUS(symbol_num,1),symbol_num); + inc2_num=NUMBERS(PREVIOUS(symbol_num,2),symbol_num); + + symbol=SYMBOLS(symbol_num,1); + + if(inc1_num<0) + inc1_sign="+"; + inc1_num=-inc1_num; + else + inc1_sign="-"; + end + + if(inc2_num<0) + inc2_sign="+"; + inc2_num=-inc2_num; + else + inc2_sign="-"; + end + + inc1_num=inc1_num-1; + inc2_num=inc2_num-1; + + if(symbol==1 || symbol==-1), + fction=function_real; + else + fction=function_imag; + symbol=symbol*(-j); + end + + if(symbol==1), + symbol_sign="+"; + else + symbol_sign="-"; + end + + branch_metric1=[" " symbol_sign " input_symbol_" fction " " inc1_sign " increment[" int2str(inc1_num) "]" ]; + branch_metric2=[" " symbol_sign " input_symbol_" fction " " inc2_sign " increment[" int2str(inc2_num) "]" ]; + + num = ceil((symbol_num)/2); + prev1_num = ceil((PREVIOUS(symbol_num,1))/2)-1; + prev2_num = ceil((PREVIOUS(symbol_num,2))/2)-1; + + if(mod(symbol_num,2)==1), + pm_candidates_imag(num, 1)=[ "pm_candidate1 = old_path_metrics[" int2str(prev1_num) "]" branch_metric1 ]; + pm_candidates_imag(num, 2)=[ "pm_candidate2 = old_path_metrics[" int2str(prev2_num) "]" branch_metric2 ]; + else + pm_candidates_real(num, 1)=[ "pm_candidate1 = old_path_metrics[" int2str(prev1_num) "]" branch_metric1 ]; + pm_candidates_real(num, 2)=[ "pm_candidate2 = old_path_metrics[" int2str(prev2_num) "]" branch_metric2 ]; + end +end + diff --git a/viterbi_generator/utils/lower_utils/generate_increment.m b/viterbi_generator/utils/lower_utils/generate_increment.m new file mode 100644 index 0000000..9575796 --- /dev/null +++ b/viterbi_generator/utils/lower_utils/generate_increment.m @@ -0,0 +1,72 @@ +function [INCREMENT NUMBERS] = generate_increment(SYMBOLS,PREVIOUS)%,Rhh) + + ########################################################################### + # Copyright (C) 2008 by Piotr Krysik # + # pkrysik@stud.elka.pw.edu.pl # + # # + # This program is free software; you can redistribute it and/or modify # + # it under the terms of the GNU General Public License as published by # + # the Free Software Foundation; either version 3 of the License, or # + # (at your option) any later version. # + # # + # This program is distributed in the hope that it will be useful, # + # but WITHOUT ANY WARRANTY; without even the implied warranty of # + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # + # GNU General Public License for more details. # + # # + # You should have received a copy of the GNU General Public License # + # along with this program; if not, write to the # + # Free Software Foundation, Inc., # + # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # + ########################################################################### + +MSK_STATES_NUM=4; % 1,-1,j,-j +[POSIBLE_SEQ_NUM,Lh]=size(SYMBOLS); +INCREMENT_NUM=2**(Lh-1); +%Lh - channel memory length +%POSIBLE_SEQ_NUM - number of posible sequences of MSK symbols (1,-1,j,-j) for given Lh + +%INCREMENT=zeros(2,Lh,POSIBLE_SEQ_NUM/8); + +% Rhh IS STORED AS: +% [ Rhh(1) Rhh(2) Rhh(3) ... Rhh(Lh) ] +INCREMENT=zeros(INCREMENT_NUM, Lh); + +for n=1:POSIBLE_SEQ_NUM, + % ONLY TWO LEGAL PREVIOUS STATES EXIST, SO THE LOOP IS UNROLLED + m=PREVIOUS(n,1); + vector=[conj(SYMBOLS(n,1))* SYMBOLS(m,:)]; + number=complex_vect2number(vector); + if(number>0) + INCREMENT(number,:)=vector; + end + + NUMBERS(m,n)=number; + + m=PREVIOUS(n,2); + vector=[conj(SYMBOLS(n,1))* SYMBOLS(m,:)]; + number=complex_vect2number(vector); + if(number>0) + INCREMENT(number,:)=vector; + end + NUMBERS(m,n)=number; +end + +%test_inc=zeros(2**(Lh+1),2**(Lh+1)); +%for n=1:2**(Lh+1), +% for m=1:2**(Lh+1), +% number=NUMBERS(m,n); + +% if(number!=0) +% sign=1; +% if(number<0), +% sign=-1; +% number=-number; +% end +% test_inc(m,n)=real(sign*INCREMENT(number,:)*Rhh(2:Lh+1).'); +% end +% end +%end +%INCREMENT +%test_inc +%NUMBERS diff --git a/viterbi_generator/utils/lower_utils/lower_utils/complex_vect2number.m b/viterbi_generator/utils/lower_utils/lower_utils/complex_vect2number.m new file mode 100644 index 0000000..f0d6d25 --- /dev/null +++ b/viterbi_generator/utils/lower_utils/lower_utils/complex_vect2number.m @@ -0,0 +1,44 @@ +function [ number ] = complex_vect2number(vector) + + ########################################################################### + # Copyright (C) 2008 by Piotr Krysik # + # pkrysik@stud.elka.pw.edu.pl # + # # + # This program is free software; you can redistribute it and/or modify # + # it under the terms of the GNU General Public License as published by # + # the Free Software Foundation; either version 3 of the License, or # + # (at your option) any later version. # + # # + # This program is distributed in the hope that it will be useful, # + # but WITHOUT ANY WARRANTY; without even the implied warranty of # + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # + # GNU General Public License for more details. # + # # + # You should have received a copy of the GNU General Public License # + # along with this program; if not, write to the # + # Free Software Foundation, Inc., # + # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # + ########################################################################### + +% Change complex vector of values: 1,-1 or j,-j +% into a integer number. + + number=0; + [r,Lh] = size(vector); + for l=1:Lh, + position=2**(l-1); + if(vector(l)==1), + number=number+position*(1); + elseif(vector(l)==-1), + number=number+position*(-1); + elseif(vector(l)==-j), + number=number+position*(1); + elseif(vector(l)==j), + number=number+position*(-1); + end + end + if number < 0, + number=floor(number/2); + else + number=ceil(number/2); + end diff --git a/viterbi_generator/utils/lower_utils/lower_utils/generate_previous.m b/viterbi_generator/utils/lower_utils/lower_utils/generate_previous.m new file mode 100644 index 0000000..942c4dc --- /dev/null +++ b/viterbi_generator/utils/lower_utils/lower_utils/generate_previous.m @@ -0,0 +1,35 @@ +function [ PREVIOUS ] = generate_previous(Lh) + + ########################################################################### + # Copyright (C) 2008 by Piotr Krysik # + # pkrysik@stud.elka.pw.edu.pl # + # # + # This program is free software; you can redistribute it and/or modify # + # it under the terms of the GNU General Public License as published by # + # the Free Software Foundation; either version 3 of the License, or # + # (at your option) any later version. # + # # + # This program is distributed in the hope that it will be useful, # + # but WITHOUT ANY WARRANTY; without even the implied warranty of # + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # + # GNU General Public License for more details. # + # # + # You should have received a copy of the GNU General Public License # + # along with this program; if not, write to the # + # Free Software Foundation, Inc., # + # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # + ########################################################################### + +SYMBOLS_NUM = 2**(Lh+1); +n=1; +for i=1:4:SYMBOLS_NUM, + PREVIOUS(i,1) = n+1; + PREVIOUS(i,2) = n+SYMBOLS_NUM/2+1; + PREVIOUS(i+1,1) = n; + PREVIOUS(i+1,2) = n+SYMBOLS_NUM/2; + PREVIOUS(i+2,1) = n+1; + PREVIOUS(i+2,2) = n+SYMBOLS_NUM/2+1; + PREVIOUS(i+3,1) = n; + PREVIOUS(i+3,2) = n+SYMBOLS_NUM/2; + n=n+2; +end diff --git a/viterbi_generator/utils/lower_utils/lower_utils/make_symbols.m b/viterbi_generator/utils/lower_utils/lower_utils/make_symbols.m new file mode 100644 index 0000000..3849fbd --- /dev/null +++ b/viterbi_generator/utils/lower_utils/lower_utils/make_symbols.m @@ -0,0 +1,35 @@ +function [ SYMBOLS ] = make_symbols(Lh) + + ########################################################################### + # Copyright (C) 2008 by Piotr Krysik # + # pkrysik@stud.elka.pw.edu.pl # + # # + # This program is free software; you can redistribute it and/or modify # + # it under the terms of the GNU General Public License as published by # + # the Free Software Foundation; either version 3 of the License, or # + # (at your option) any later version. # + # # + # This program is distributed in the hope that it will be useful, # + # but WITHOUT ANY WARRANTY; without even the implied warranty of # + # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # + # GNU General Public License for more details. # + # # + # You should have received a copy of the GNU General Public License # + # along with this program; if not, write to the # + # Free Software Foundation, Inc., # + # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # + ########################################################################### + +BRANCH_NUM=2**(Lh+1); +SYMBOLS=ones(BRANCH_NUM, Lh); + +for column=1:Lh, + for i=1:(2**column), + SYMBOLS(i:(2**(column+1)):BRANCH_NUM,column)=-1; + end + +end + +SYMBOLS(1:2:BRANCH_NUM, 1:2:Lh) = SYMBOLS(1:2:BRANCH_NUM, 1:2:Lh).*(-j); +SYMBOLS(2:2:BRANCH_NUM, 2:2:Lh) = SYMBOLS(2:2:BRANCH_NUM, 2:2:Lh).*(-j); + |