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www.freepatentsonline.com/WO2004114553.html

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Posted by crouse

urpose is
64 othoronal Walsh codes per sector to identify channels (S/N is not infinite due to AWGN, multipath, and the neighboring cell)

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Posted by waqqas1

1. The forward link consists of up to 64 logical channels (code channels).
2. Code channels is one of a set of 64 so-called Walsh functions.
Purpose is
64 othoronal Walsh codes per sector to identify channels (S/N is not infinite due to AWGN, multipath, and the neighboring cell)
Long code (period 2 42 -1) to scramble data
DS at 1.2288 Mcps
4. Every cell uses the same PN sequence (period 2 15 or 26.67ms) and is identified by a pre-defined offset (64 x n chips)
5. Coherent QPSK demodulation
Diversity
6. time diversity: coding + interleaving
path diversity: soft handoff and RAKE receiver

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Posted by Andy08