function SymDeQAM=rx_16QAM_mod(SymFFT,OFDM_per_Symbol,Carrier_Num,Bit_Num)

SymDeQAMtmp=reshape(SymFFT,1,OFDM_per_Symbol*Carrier_Num);
m=real(SymDeQAMtmp);
n=abs(real(SymDeQAMtmp));
p=imag(SymDeQAMtmp);
q=abs(imag(SymDeQAMtmp));
s=2*(m==n)-1;
t=2*(p==q)-1;
SymDeQAMtmpshift=SymDeQAMtmp+((-2)*(s+i*t));
bit0=imag(SymDeQAMtmp);
bit1=imag(SymDeQAMtmpshift);
bit2=real(SymDeQAMtmp);
bit3=real(SymDeQAMtmpshift);
SymDeQAMtmptmp=zeros(Bit_Num,OFDM_per_Symbol*Carrier_Num);
SymDeQAMtmptmp(1,:)=bit0;
SymDeQAMtmptmp(2,:)=bit1;
SymDeQAMtmptmp(3,:)=bit2;
SymDeQAMtmptmp(4,:)=bit3;

for j=1:(Bit_Num*OFDM_per_Symbol*Carrier_Num)
    if SymDeQAMtmptmp(j)>0
        SymDeQAMtmptmp(j)=0;
    else SymDeQAMtmptmp(j)=1;
    end
end

SymDeQAM=reshape(SymDeQAMtmptmp,1,Bit_Num*OFDM_per_Symbol*Carrier_Num);