Adaptive multiuser receiver with joint channel and time delay estimation of CDMA signals based on the square-root unscented filter Academic Article

abstract

• The paper discusses an adaptive multiuser receiver for CDMA systems in which the scaled unscented filter (SUF) and the square root unscented filter (SURF) are used for joint estimation and tracking of the code delays and multipath coefficients of the received CDMA signals. The proposed channel estimators are more near-far resistant than the conventional extended Kalman filter (EKF) and present lower complexity than the conventional particle filter (PF) based methods. To present meaningful performance measures, the modified Cramer-Rao lower bound (CRLB) and computational complexity metrics are derived for the proposed and existing channel estimators. Computer simulation results demonstrate the superior performance of the proposed channel estimators. The proposed estimators are also shown to exhibit lower complexity relative to the PF. 2007 Elsevier SAS. All rights reserved.

authors

• Serpedin, Erchin

published proceedings

• DIGITAL SIGNAL PROCESSING

author list (cited authors)

• Kim, J., Shin, D., & Serpedin, E.

citation count

• 5

complete list of authors

• Kim, Jang-Sub||Shin, Dong-Ryeol||Serpedin, Erchin

publication date

• May 2009

publisher

• Elsevier  Publisher

published in

• Digital Signal Processing  Journal

keywords

• Channel Estimation
• Code Division Multiple Access (cdma)
• Extended Kalman Filter
• Multiuser Detection
• Nonlinear Recursive Filter
• Scaled Unscented Filter
• Square Root Unscented Filter

Digital Object Identifier (DOI)

• 10.1016/j.dsp.2007.11.007

start page

• 504

end page

• 520

volume

• 19

issue

• 3