Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-10-30
2010-06-01
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000
Reexamination Certificate
active
07729409
ABSTRACT:
Apparatuses for achieving high bit densities in a direct-sequence CDMA spread spectrum communication system are disclosed. A table of orthogonal pseudo-noise codes is stored. This table is then partitioned into multiple codebook. Then, the codebook is assigned to a user. The pseudo-noise code contained within the codebooks are used to spread information signal. Information signal for a first user is spread by a pseudo-noise code contained within the codebook assigned to the first user. Multiple bits of information signal may be sent at a time by using the location of the pseudo-noise code within the codebook such that the value of the information signal corresponds the location of the pseudo-noise code within the codebook. The information signal is then despread by using the same pseudo-noise code.
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Ghebretinsae Temesghen
Intel Corporation
Schwabe Williamson & Wyatt P.C.
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