function [b1,b2]=S2Pa
global f_syb
f_syb=10000;
f_b=2*f_syb;
global f_s
f_s=400000;
T=0.05;
samples=f_s*T;
t=(0:(samples-1))/f_s;
bits=f_b*T;
rand('seed',1);
b=round(rand(1,bits));
bits_per_symbol=2;
symbols=bits/bits_per_symbol;
b_mat=reshape(b,bits_per_symbol,symbols);
b1=b_mat(1,:);
b2=b_mat(2,:);