Method for using codebook indexing to achieve high bit...

Details Method for using codebook indexing to achieve high bit... Method for using codebook indexing to achieve high bit...

2007-11-27

2007-11-27

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Spread spectrum

C375S140000, C375S146000

Reexamination Certificate

active

09002747

ABSTRACT:
A method for achieving high bit densities in a direct-sequence CDMA spread spectrum communication system. 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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