spreading code cross correlation

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kaleza

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hi all,
in my system I use spreading code and representing -1 with pulse y0 and 1 with pulse y1.
e.g. if the sequence is [-1 -1 -1 1 1 1 1] so the tx signal is [y0 y0 y0 y1 y1 y1 y1].
how can I check which sequence has been transmitted using correlation?
thanks in advance
 

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