Method and apparatus for multi-user code channel activation...

Details Method and apparatus for multi-user code channel activation... Method and apparatus for multi-user code channel activation...

2005-11-28

2009-06-30

Chan, Wing F (Department: 2419)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S252000, C375S137000

Reexamination Certificate

active

07554956

ABSTRACT:
The present invention provides a method for detecting active code channels of multiple users in a wireless communications system. The method comprises the steps of: receiving the radio signals that contain the signals of at least two of said multiple users; separating the data and training sequences of said received radio signals; making channel estimation based on said separated training sequences to obtain the estimated channel response; obtaining, based on said estimated channel response, the active channel response windows; obtaining the allocated spreading codes to which said active channel response windows may correspond; determining, based on the estimated channel responses and the possible corresponding allocated spreading codes, the active spreading code channels corresponding to said active channel response windows; making multi-user detection in the determined active code channels. Thus the blind or semi-blind detection of the receiver is implemented.

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Minying Sun; Ser Wah Oh; “Detect Spreading Code for Multi-User Detector in TD-SCDMS Downlink”, Sep. 25-28, 2005, Vehicular Technology Conference 2005, VTC-2005-Fall. 2005 IEEE 62nd, pp. 1984-1987.

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