US 7,321,610 B2
Method and system of interference cancellation in multi-cell CDMA systems
Chun Chian Lu, Hsinwu Hsiang (Taiwan)
Assigned to Industrial Technology Research Institute, Hsinchu (Taiwan)
Filed on Aug. 15, 2002, as Appl. No. 10/218,456.
Claims priority of provisional application 60/365181, filed on Mar. 19, 2002.
Prior Publication US 2003/0179698 A1, Sep. 25, 2003
Int. Cl. H04B 1/707 (2006.01); H04L 27/28 (2006.01); H04J 11/00 (2006.01)
U.S. Cl. 375—148  [375/260; 370/209; 370/335] 27 Claims
OG exemplary drawing
 
1. A method of detecting a single user in a multi-user communication system, the method comprising:
receiving a plurality of user signals;
defining a frame having a window that includes a sequence of at least three symbols for each received user signal;
calculating an amplitude approximation of a selected one of the plurality of user signals based on a zero-order amplitude approximation of the sequence;
correlating the sequence of the selected user signal with the sequence of at least one other user signal to obtain a correlation matrix within the window of the frame based at least on a plurality of reflection paths corresponding to the sequence of each received user signal;
calculating an amplitude correction value based on the correlated sequences of the frame for adjusting the amplitude approximation; and
shifting the window of the frame, when the selected user signal has not been processed in its entirety, so that the amplitude approximation can be adjusted for each additional sequence.