Turbo estimation and equalization for asynchronous uplink MC-CDMA

被引：16
|
作者：
Guenach, M. [1 ]
Marey, M. [2 ]
Wymeersch, H. [3 ]
Steendam, H. [2 ]
Moeneclaey, M. [2 ]
机构：
[1] Alcatel Lucent, Bell Labs, Plano, TX 75075 USA
[2] Univ Ghent, TELIN Dept, B-9000 Ghent, Belgium
[3] MIT, Lab Informat & Decis Syst, Cambridge, MA 02139 USA
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2008年 / 7卷 / 04期
关键词：
synchronization; estimation; code-aided; turbo equalization; asynchronous MC-CDMA; uplink;
D O I：
10.1109/TWC.2008.060648
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this contribution, we propose a new code-aided synchronization and channel estimation algorithm for uplink MC-CDMA. The space alternating generalized expectation-maximization (SAGE) algorithm is used to estimate the channel impulse responses, propagation delays and carrier frequency offsets of the different users. The estimator, multi-user detector, equalizer, demapper and channel decoder exchange soft information in an iterative way. The performance of the proposed algorithm is evaluated through Monte Carlo simulations. Impressive performance gains are visible as compared to a conventional data-aided estimation scheme.
引用
收藏
页码：1217 / 1226
页数：10
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