Code allocation based on cross code correlation

Details Code allocation based on cross code correlation Code allocation based on cross code correlation

2005-05-03

2005-05-03

Pham, Chi (Department: 2663)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S335000

Reexamination Certificate

active

06888814

ABSTRACT:
The invention includes various approaches to assigning codes in wireless code division multiple access communication systems. The invention estimates the cross code correlation between codes to base the code assignment. One approach assigns codes having a high cross correlation to users having a low transmission power level. Another approach assigns code groups having a high cross correlation to a same coded composite transport channel. Another approach assigns codes using a cross correlation factor of each code to minimize a system noise rise. Another approach uses transmission or reception diversity to assign bad code groups to users having a different diversity relationship. Another approach uses a diversity factor and a cross code correlation factor to assign codes.

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Xu, Zhengyuan. “Asymptotically Near-Optimal Blind Estiimation of Multipath CDMA Channels”. IEEE. Sep. 2001. pp. 2003-2017.

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