decode_bp_main.asv

关于LDPC编码的MATLAB实现仿镇,求关于LDPC码的FPGA实现

function[L]=decode_BP_main(y,H,Lq)

for i=1:20                                            %确定符号
  if y(i)<1                        
       sgn(i)=-1;
   elseif y(i)>1
       sgn(i)=1;
   end       
end     


R(1,1)=-sgn(3)*sgn(8)*sgn(9)*phi(phi(Lq(3))+phi(Lq(8))+phi(Lq(9)));
R(3,1)=-sgn(4)*sgn(5)*sgn(11)*phi(phi(Lq(4))+phi(Lq(5))+phi(Lq(11)));
R(6,1)=-sgn(12)*sgn(13)*sgn(14)*phi(phi(Lq(12))+phi(Lq(13))+phi(Lq(14)));

R(4,2)=-sgn(8)*sgn(11)*sgn(12)*phi(phi(Lq(8))+phi(Lq(11))+phi(Lq(12)));
R(5,2)=-sgn(3)*sgn(7)*sgn(13)*phi(phi(Lq(3))+phi(Lq(7))+phi(Lq(13)));
R(11,2)=-sgn(6)*sgn(18)*sgn(19)*phi(phi(Lq(6))+phi(Lq(18))+phi(Lq(19)));

R(1,3)=-sgn(1)*sgn(8)*sgn(9)*phi(phi(Lq(1))+phi(Lq(8))+phi(Lq(9)));
R(5,3)=-sgn(2)*sgn(7)*sgn(13)*phi(phi(Lq(2))+phi(Lq(7))+phi(Lq(13)));
R(8,3)=-sgn(4)*sgn(10)*sgn(16)*phi(phi(Lq(4))+phi(Lq(10))+phi(Lq(16)));

R(3,4)=-sgn(1)*sgn(5)*sgn(11)*phi(phi(Lq(1))+phi(Lq(5))+phi(Lq(11)));
R(8,4)=-sgn(3)*sgn(10)*sgn(16)*phi(phi(Lq(3))+phi(Lq(10))+phi(Lq(16)));
R(13,4)=-sgn(8)*sgn(19)*sgn(20)*phi(phi(Lq(8))+phi(Lq(19))+phi(Lq(20)));

R(2,5)=-sgn(6)*sgn(7)*sgn(10)*phi(phi(Lq(6))+phi(Lq(7))+phi(Lq(10)));
R(3,5)=-sgn(1)*sgn(4)*sgn(11)*phi(phi(Lq(1))+phi(Lq(4))+phi(Lq(11)));
R(15,5)=-sgn(9)*sgn(17)*sgn(19)*phi(phi(Lq(9))+phi(Lq(17))+phi(Lq(19)));

R(2,6)=-sgn(5)*sgn(7)*sgn(10)*phi(phi(Lq(5))+phi(Lq(7))+phi(Lq(10)));
R(11,6)=-sgn(2)*sgn(18)*sgn(19)*phi(phi(Lq(2))+phi(Lq(18))+phi(Lq(19)));
R(12,6)=-sgn(15)*sgn(17)*sgn(20)*phi(phi(Lq(15))+phi(Lq(17))+phi(Lq(20)));

R(2,7)=-sgn(5)*sgn(6)*sgn(10)*phi(phi(Lq(5))+phi(Lq(6))+phi(Lq(10)));
R(5,7)=-sgn(2)*sgn(3)*sgn(13)*phi(phi(Lq(2))+phi(Lq(3))+phi(Lq(13)));
R(9,7)=-sgn(14)*sgn(16)*sgn(17)*phi(phi(Lq(14))+phi(Lq(16))+phi(Lq(17)));

R(1,8)=-sgn(1)*sgn(3)*sgn(9)*phi(phi(Lq(1))+phi(Lq(3))+phi(Lq(9)));
R(4,8)=-sgn(2)*sgn(11)*sgn(12)*phi(phi(Lq(2))+phi(Lq(11))+phi(Lq(12)));
R(13,8)=-sgn(3)*sgn(19)*sgn(20)*phi(phi(Lq(3))+phi(Lq(19))+phi(Lq(20)));

R(1,9)=-sgn(1)*sgn(3)*sgn(8)*phi(phi(Lq(1))+phi(Lq(3))+phi(Lq(18)));
R(7,9)=-sgn(10)*sgn(12)*sgn(15)*phi(phi(Lq(10))+phi(Lq(12))+phi(Lq(15)));
R(15,9)=-sgn(5)*sgn(17)*sgn(19)*phi(phi(Lq(5))+phi(Lq(17))+phi(Lq(19)));

R(2,10)=-sgn(5)*sgn(6)*sgn(7)*phi(phi(Lq(5))+phi(Lq(6))+phi(Lq(7)));
R(7,10)=-sgn(9)*sgn(12)*sgn(15)*phi(phi(Lq(9))+phi(Lq(12))+phi(Lq(15)));
R(8,10)=-sgn(3)*sgn(4)*sgn(16)*phi(phi(Lq(3))+phi(Lq(4))+phi(Lq(16)));

R(3,11)=-sgn(1)*sgn(4)*sgn(5)*phi(phi(Lq(1))+phi(Lq(4))+phi(Lq(5)));
R(4,11)=-sgn(2)*sgn(8)*sgn(12)*phi(phi(Lq(2))+phi(Lq(8))+phi(Lq(12)));
R(10,11)=-sgn(14)*sgn(15)*sgn(18)*phi(phi(Lq(14))+phi(Lq(15))+phi(Lq(18)));

R(4,12)=-sgn(2)*sgn(8)*sgn(11)*phi(phi(Lq(2))+phi(Lq(8))+phi(Lq(11)));
R(6,12)=-sgn(1)*sgn(13)*sgn(14)*phi(phi(Lq(1))+phi(Lq(13))+phi(Lq(14)));
R(7,12)=-sgn(9)*sgn(10)*sgn(15)*phi(phi(Lq(9))+phi(Lq(10))+phi(Lq(15)));

R(5,13)=-sgn(2)*sgn(3)*sgn(7)*phi(phi(Lq(2))+phi(Lq(3))+phi(Lq(7)));
R(6,13)=-sgn(1)*sgn(12)*sgn(14)*phi(phi(Lq(1))+phi(Lq(12))+phi(Lq(14)));
R(14,13)=-sgn(16)*sgn(18)*sgn(20)*phi(phi(Lq(16))+phi(Lq(18))+phi(Lq(20)));

R(6,14)=-sgn(1)*sgn(12)*sgn(13)*phi(phi(Lq(1))+phi(Lq(12))+phi(Lq(13)));
R(9,14)=-sgn(7)*sgn(16)*sgn(17)*phi(phi(Lq(7))+phi(Lq(16))+phi(Lq(17)));
R(10,14)=-sgn(11)*sgn(15)*sgn(18)*phi(phi(Lq(11))+phi(Lq(15))+phi(Lq(18)));

R(7,15)=-sgn(9)*sgn(10)*sgn(12)*phi(phi(Lq(9))+phi(Lq(10))+phi(Lq(12)));
R(10,15)=-sgn(11)*sgn(14)*sgn(18)*phi(phi(Lq(11))+phi(Lq(14))+phi(Lq(18)));
R(12,15)=-sgn(6)*sgn(17)*sgn(20)*phi(phi(Lq(6))+phi(Lq(17))+phi(Lq(20)));

R(8,16)=-sgn(3)*sgn(4)*sgn(10)*phi(phi(Lq(3))+phi(Lq(4))+phi(Lq(10)));
R(9,16)=-sgn(7)*sgn(14)*sgn(17)*phi(phi(Lq(7))+phi(Lq(14))+phi(Lq(17)));
R(14,16)=-sgn(13)*sgn(18)*sgn(20)*phi(phi(Lq(13))+phi(Lq(18))+phi(Lq(20)));

R(9,17)=-sgn(7)*sgn(14)*sgn(16)*phi(phi(Lq(7))+phi(Lq(14))+phi(Lq(16)));
R(12,17)=-sgn(6)*sgn(15)*sgn(20)*phi(phi(Lq(6))+phi(Lq(15))+phi(Lq(20)));
R(15,17)=-sgn(5)*sgn(9)*sgn(19)*phi(phi(Lq(5))+phi(Lq(9))+phi(Lq(19)));

R(10,18)=-sgn(11)*sgn(14)*sgn(15)*phi(phi(Lq(11))+phi(Lq(14))+phi(Lq(15)));
R(11,18)=-sgn(2)*sgn(6)*sgn(19)*phi(phi(Lq(2))+phi(Lq(6))+phi(Lq(19)));
R(14,18)=-sgn(13)*sgn(16)*sgn(20)*phi(phi(Lq(13))+phi(Lq(16))+phi(Lq(20)));

R(11,19)=-sgn(2)*sgn(6)*sgn(18)*phi(phi(Lq(2))+phi(Lq(6))+phi(Lq(18)));
R(13,19)=-sgn(4)*sgn(8)*sgn(20)*phi(phi(Lq(4))+phi(Lq(8))+phi(Lq(20)));
R(15,19)=-sgn(5)*sgn(9)*sgn(17)*phi(phi(Lq(5))+phi(Lq(9))+phi(Lq(17)));

R(12,20)=-sgn(6)*sgn(15)*sgn(17)*phi(phi(Lq(6))+phi(Lq(15))+phi(Lq(17)));
R(13,20)=-sgn(4)*sgn(8)*sgn(19)*phi(phi(Lq(4))+phi(Lq(8))+phi(Lq(19)));
R(14,20)=-sgn(13)*sgn(16)*sgn(18)*phi(phi(Lq(13))+phi(Lq(16))+phi(Lq(18)));

L(1)=Lc(1)+R(1,1)+R(3,1)+R(6,1);
L(2)=Lc(2)+R(4,2)+R(5,2)+R(11,2);
L(3)=Lc(3)+R(1,3)+R(5,3)+R(8,3);
L(4)=Lc(4)+R(3,4)+R(8,4)+R(13,4);
L(5)=Lc(5)+R(2,5)+R(3,5)+R(15,5);
L(6)=Lc(6)+R(2,6)+R(11,6)+R(12,6);
L(7)=Lc(7)+R(2,7)+R(5,7)+R(9,7);
L(8)=Lc(8)+R(1,8)+R(4,8)+R(13,8);
L(9)=Lc(9)+R(1,9)+R(7,9)+R(15,9);
L(10)=Lc(10)+R(2,10)+R(7,10)+R(8,10);
L(11)=Lc(11)+R(3,11)+R(4,11)+R(10,11);
L(12)=Lc(12)+R(4,12)+R(6,12)+R(7,12);
L(13)=Lc(13)+R(5,13)+R(6,13)+R(14,13);
L(14)=Lc(14)+R(6,14)+R(9,14)+R(10,14);
L(15)=Lc(15)+R(7,15)+R(10,15)+R(12,15);
L(16)=Lc(16)+R(8,16)+R(9,16)+R(14,16);
L(17)=Lc(17)+R(9,17)+R(12,17)+R(15,17);
L(18)=Lc(18)+R(10,18)+R(11,18)+R(14,18);
L(19)=Lc(19)+R(11,19)+R(13,19)+R(15,19);
L(20)=Lc(20)+R(12,20)+R(13,20)+R(14,20);