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MMSE/PIC multiuser detection for DS/CDMA systems with inter- and intra-cell interference

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2 Author(s)
Host-Madsen, A. ; Kwangju Inst. of Sci. & Technol., South Korea ; Kyung-Sean Cho

This paper analyzes combinations of the linear minimum mean square error (MMSE) detector and a nonlinear parallel interference canceller (PIC) for multiuser code-division multiple-access (CDMA) detection. Both the case where all users' codes are known at the receiver and the case where only some codes are known are considered. An upper bound and an approximate formula for the error probability are derived and verified through simulation. It is shown that the combined MMSE/PIC detector can have a considerable performance gain over the MMSE. It is also shown that while the MMSE detector is sensitive to large code cross-correlation values, the combined MMSE/PIC detector is robust to code cross correlations. Finally, use of the MMSE/PIC detector for cellular systems with both inter- and intra-cell interference is considered

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Communications, IEEE Transactions on  (Volume:47 ,  Issue: 2 )