resolvethelastbit.m

来自「汪裕民的OFDM关键技术与应用中仿真MIMO-OFDM的源代码」· M 代码 · 共 37 行

function[bits_alloc,energy_alloc] = ResolvetheLastBit(bits_alloc,energy_alloc,index,energytable,num_subc);

max_val = 0;
for i =1:num_subc
    if(i~=index & bits_alloc(i)==1)
        if bits_alloc(i)~=0
            temp = energytable(i,bits_alloc(i));
        end
        if(temp>max_val)
            max_val = temp;
            max_ind = i;
        end
    end
end

min_val = Inf;
for i = 1:num_subc
     if(i~=index & bits_alloc(i)==1)
        if bits_alloc(i)~=0
            temp = energytable(i,bits_alloc(i)+1);
        end
        if(temp<min_val)
            min_val = temp;
            min_ind = i;
        end
     end
end

if(min_val<max_val)
    bits_alloc(min_ind) = bits_alloc(min_ind)+1;
    bits_alloc(index) = bits_alloc(index)-1;
    energy_alloc(index) = energy_alloc(index)-min_val;
else
    bits_alloc(max_ind) =  bits_alloc(max_ind)-1;
    bits_alloc(index) = bits_alloc(index)+1;
    energy_alloc(index) = energy_alloc(index)+max_val;
end