So... After going deep into Annex L i found that my scrambler fails. Also MATLAB built-in scrambler gives wrong results. Could you pls check this code fragment?
Asumme that we have 20 data bits to scramble. Initial scrambler state is [1 0 1 1 1 0 1] (bit nr 7 left side). scrambler_register=[1 0 1 1 1 0 1]; % scrambler seed data_bits=randi([0 1],1,20); % data to be scrambled for i=1:20 temp=xor(scrambler_register(1),scrambler_register(4)); % x7 and x4 xor operation data_scrambled(i)=xor(data_bits(i),temp); % output bit register=circshift(scrambler_register',-1,1)'; % shift left register register(7)=data_scrambled(i); % insert data to register end To clarify, left side of register has index (1), right side has index (7). Best, Ernest -- View this message in context: http://gnuradio.4.n7.nabble.com/GRC-3-6-802-11-a-g-test-signal-tp50585p50685.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
