scrambling.m

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function d = scrambling(b,c)

 
% scrambling b(i)
numbits = N_PDCCHbits*n_PDCCH;
for i = 1:numbits
    if  b(i) == 2  % ACK/NAK or Rank Indication placeholder bits,set as 2
        d(i) = 1;
    elseif  b(i) == -1  % ACK/NAK or Rank Indication repetition placeholder bits,set as -1
        d(i + 1) = d(i);
    else d(i) = mod((b(i) + c(i)),2); % Data or channel quality coded bits, Rank Indication coded bits or ACK/NAK coded bits,set as 0/1
    end
end