Analysis of DFT-based channel estimators for OFDM

被引：217

作者：

Edfors, O ^{[1
]}

Sandell, M

Van De Beek, JJ

Wilson, SK

Börjesson, PO

机构：

[1] Lund Univ, Dept Appl Elect, S-22100 Lund, Sweden

[2] Lucent Technol, Bell Labs, Swindon SN5 6PP, Wilts, England

[3] Nokia Svenska AB, R&D, S-16422 Kista, Sweden

[4] Lulea Univ Technol, Div Signal Proc, S-97187 Lulea, Sweden

来源：

WIRELESS PERSONAL COMMUNICATIONS | 2000年 / 12卷 / 01期

关键词：

orthogonal frequency-division multiplexing; channel estimation; discrete Fourier transform; complexity analysis;

D O I：

10.1023/A:1008864109605

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

In this paper we analyze the performance of three low-complexity channel estimators, based on the discrete Fourier transform (DFT), for orthogonal frequency-division multiplexing (OFDM) systems. Estimators of this type have been analyzed for discrete-time channels, and we extend this analysis to continuous-time channels. We present analytical expressions for their mean-squared error (MSE) and evaluate their complexity vs. symbol-error rate (SER) for 16-QAM. The analysis shows that this type of estimators may experience an irreducible error floor at high SNRs. However, in one of the three estimators the error floor can be eliminated while the complexity stays low and the performance is maximized.

引用

页码：55 / 70

页数：16

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