By Topic

A Semi-Blind Multiuser Detection Based on Chebyshev Approximation and Subspace Tracking for MC-CDMA Uplink

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
4 Author(s)
Yan Meng ; Sch. of Inf. Sci. & Eng., Northeastern Univ., Shenyang ; Jinkuan Wang ; Xin Song ; Jun Zhu

In this paper, a new semi-blind multiuser detection based on a hybrid of Chebyshev approximation (CA) and subspace estimation is proposed for multicarrier code division multiple access (MC-CDMA) uplink. It is shown that the detector can be expressed as an anchored signal in the signal subspace and the coefficients can be estimated by CA algorithm. The spreading sequences of all known users are used to impose the linear vector constraints on the multiuser detector such that the interferers within the cell are suppressed effectively. To reduce the computational complexity, an improved projecting approximation subspace tracking with deflation (PASTd) algorithm is presented for adaptive subspace estimation. Simulation results demonstrate that the proposed semi-blind multiuser detection offers substantial performance gains over the blind multiuser detection in the MC-CDMA uplink environment

Published in:

TENCON 2006. 2006 IEEE Region 10 Conference

Date of Conference:

14-17 Nov. 2006