| CDMA: Direct
Sequence Example |
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| n | Why
does direct sequence CDMA work? Answer: |
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| chip
sequences are orthogonal |
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| n | example: |
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| – | use
bipolar notation: binary 0 is -1, binary 1 is +1 |
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| – | let S
denote chip sequence for station S, S its |
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| negotiation |
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| – | orthogonality:
inner product of two chip sequences S |
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| and T
(S T) is 0: |
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