Beam space-time coding for high-speed ultra-wideband OFDM-based wireless system

被引：0

作者：

Shing, TC ^{[1
]}

Shui, YH ^{[1
]}

Sun, MC ^{[1
]}

Feng, WS ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Elect Engn, Lab 331, Taipei 10764, Taiwan

来源：

INTERNATIONAL CONFERENCE ON COMPUTING, COMMUNICATIONS AND CONTROL TECHNOLOGIES, VOL 3, PROCEEDINGS | 2004年

关键词：

OFDM; STBC; MIMO; Walsh-Hadamard Transform (WHT); MMSE; Bezout equalization;

D O I：

暂无

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

The orthogonal frequency division (OFDM) beam space-time system may experience significant inter-carrier interference (ICI) when employing in time- and frequency-selective channels. The classical symbol estimation schemes, e.g., minimum mean-squared error (MMSE) and zero-forcing (ZF) estimation, require matrix inversion that is prohibitively complex for large symbol lengths. An analysis of the ICI generating mechanism leads us to propose a two-stage equalizer whose complexity is linear in the OFDM symbol length. The first stage applies the optimal linear precoder of Walsh Hadamard to restrict ICI effect and the second stage uses iterative MMSE estimation to estimate finite-alphabet frequency-domain symbols. Finally, we deploy our system with a high-speed ultra-wideband OFDM based wireless system for IEEE 802.15.3a.

引用

页码：250 / 256

页数：7

共 8 条

[1] On channel estimation and detection for multicarrier signals in fast and selective Rayleigh fading channels [J].

Choi, YS ;

Voltz, PJ ;

Cassara, FA .

IEEE TRANSACTIONS ON COMMUNICATIONS, 2001, 49 (08) :1375-1387

[2]

Jakes W.C., 1975, MICROWAVE MOBILE COM

[3] Bezout space-time precoders and equalizers for MIMO channels [J].

Kung, SY ;

Wu, YN ;

Zhang, XY .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2002, 50 (10) :2499-2514

[4] Capacity of a mobile multiple-antenna communication link in Rayleigh flat fading [J].

Marzetta, TL ;

Hochwald, BM .

IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (01) :139-157

[5]

Poor H., 1985, An Introduction to Signal Detection and Estimation

[6]

RAILEIGH GG, 1998, IEEE T COMMUN, V46, P367

[7] Multivariate modulation and coding for wireless communication [J].

Raleigh, GG ;

Jones, VK .

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 1999, 17 (05) :851-866

[8] Low-complexity equalization of OFDM in doubly selective channels [J].

Schniter, P .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2004, 52 (04) :1002-1011

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