Method for two-level variable chip rate spreading and...

Details Method for two-level variable chip rate spreading and... Method for two-level variable chip rate spreading and...

2007-09-18

2007-09-18

Vo, Don N. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

Reexamination Certificate

active

10084241

ABSTRACT:
This invention involves a two-level variable chip rate spreading and despreading method used in CDMA systems. The total spreading gain is the product of the two level spreading factors. Orthogonal sequences, ZCZ sequences and Pseudo-Noise (PN) sequences can be employed as the first- and second-level spreading codes. By employing the two-level spreading method, the interference existing in the systems can be suppressed efficiently and the system performance can be improved significantly.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5414728 (1995-05-01), Zehavi
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5533012 (1996-07-01), Fukasawa et al.
patent: 5950124 (1999-09-01), Trompower et al.
patent: 6088347 (2000-07-01), Minn et al.
patent: 2001/0053178 (2001-12-01), Yano et al.
patent: 2002/0003842 (2002-01-01), Suzuki et al.
patent: WO0045530 (2000-03-01), None

Affiliated with

Also associated with

Rating

Method for two-level variable chip rate spreading and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for two-level variable chip rate spreading and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for two-level variable chip rate spreading and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3735444