Title :
A pipeline implementation of linear multiuser detector for asynchronous CDMA systems
Author :
Li, Yue-heng ; Wang, Haifeng ; Chen, Ming ; Cheng, Shi-xin
Author_Institution :
Nat. Mobile Commun. Res. Lab, Southeast Univ., Nanjing, China
Abstract :
The Gauss-Seidel iterative algorithm for linear asynchronous decorrelation or minimum mean square error (MMSE) multiuser detector can be viewed as a kind of linear soft decision feedback multiuser detection. Based on this idea, a linear decorrelating or MMSE detector can be implemented by using a much simpler pipeline structure compared with the conventional scheme of computing the inverse of the corresponding correlation matrix. Through this pipeline structure, a lot of computations can be reduced
Keywords :
code division multiple access; computational complexity; decorrelation; iterative methods; least mean squares methods; matrix inversion; multiuser channels; pipeline processing; signal detection; Gauss-Seidel iterative algorithm; MMSE detector; asynchronous CDMA; asynchronous decorrelation detector; computational complexity; correlation matrix; inverse matrix; linear multiuser detector; minimum mean square error detector; pipeline structure; soft decision feedback detection; AWGN; Decorrelation; Delay effects; Detectors; Feedback; Gaussian processes; Multiaccess communication; Multiuser detection; Pipelines; Symmetric matrices;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2001 12th IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7244-1
DOI :
10.1109/PIMRC.2001.965420
