Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-04-17
2007-04-17
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
Reexamination Certificate
active
10410832
ABSTRACT:
Disclosed is a method for using a different symbol timing for users so as to reduce a multiple access interference component in a multi-carrier code division multiple access (MC-CDMA) system. For this purpose, the presented invention involves dividing the users of the MC-CDMA system into two groups and applying an offset to the symbol timing between the user groups to cause a symbol transition of the opposite user group in the middle of the symbol interval, thereby reducing the multiple access interference component included in a symbol decision variable after a chip combination.
REFERENCES:
patent: 5729570 (1998-03-01), Magill
patent: 6952454 (2005-10-01), Jalali et al.
patent: 2002/0006157 (2002-01-01), Hunton
patent: 2002/0136176 (2002-09-01), Abeta et al.
patent: 2003/0058881 (2003-03-01), Wu et al.
Choi Kwon-Hue
Kim Soo-Young
Lim Kwang-Jae
Oh Deock-Gil
Bayard Emmanuel
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Williams Lawrence
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