Linearly precoded or coded OFDM against wireless channel fades?

Zhengdao Wang; G. B. Giannakis

doi:10.1109/SPAWC.2001.923899

Linearly precoded or coded OFDM against wireless channel fades?

Zhengdao Wang, G. B. Giannakis

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

130 Scopus citations

Abstract

Orthogonal frequency division multiplexing (OFDM) converts a dispersive channel into parallel subchannels and thus facilitates equalization. But when the channel has nulls close to or on the FFT grid, OFDM faces serious symbol recovery problems. As an alternative to various error-control coding techniques that have been proposed to ameliorate the problem, we linearly precode (LP) symbols before they are multiplexed. We identify the maximum achievable diversity order for iid or correlated Rayleigh fading channels and also provide design rules for achieving maximum diversity gains with LP-OFDM. Simulated performance comparisons of LP-OFDM with existing block and convolutionally coded OFDM alternatives favor LP-OFDM in a HiperLan2 experiment.

Original language	English (US)
Title of host publication	2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	267-270
Number of pages	4
ISBN (Electronic)	0780367200
DOIs	https://doi.org/10.1109/SPAWC.2001.923899
State	Published - Jan 1 2001
Event	3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 - Taoyuan, Taiwan, Province of China Duration: Mar 20 2001 → Mar 23 2001

Publication series

Name	IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume	2001-January

Other

Other	3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001
Country	Taiwan, Province of China
City	Taoyuan
Period	3/20/01 → 3/23/01

Keywords

AWGN
Convolution
Convolutional codes
DSL
Digital video broadcasting
Dispersion
Diversity methods
Fading
OFDM
Transmitters

Access

10.1109/SPAWC.2001.923899

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Cite this

Wang, Z., & Giannakis, G. B. (2001). Linearly precoded or coded OFDM against wireless channel fades? In 2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 (pp. 267-270). [923899] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2001-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2001.923899

Linearly precoded or coded OFDM against wireless channel fades? / Wang, Zhengdao; Giannakis, G. B.

2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001. Institute of Electrical and Electronics Engineers Inc., 2001. p. 267-270 923899 (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2001-January).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Wang, Z & Giannakis, GB 2001, Linearly precoded or coded OFDM against wireless channel fades? in 2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001., 923899, IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, vol. 2001-January, Institute of Electrical and Electronics Engineers Inc., pp. 267-270, 3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001, Taoyuan, Taiwan, Province of China, 3/20/01. https://doi.org/10.1109/SPAWC.2001.923899

Wang Z, Giannakis GB. Linearly precoded or coded OFDM against wireless channel fades? In 2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001. Institute of Electrical and Electronics Engineers Inc. 2001. p. 267-270. 923899. (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). https://doi.org/10.1109/SPAWC.2001.923899

@inproceedings{81af4c9326f043feb4188940d49fe4c2,

title = "Linearly precoded or coded OFDM against wireless channel fades?",

abstract = "Orthogonal frequency division multiplexing (OFDM) converts a dispersive channel into parallel subchannels and thus facilitates equalization. But when the channel has nulls close to or on the FFT grid, OFDM faces serious symbol recovery problems. As an alternative to various error-control coding techniques that have been proposed to ameliorate the problem, we linearly precode (LP) symbols before they are multiplexed. We identify the maximum achievable diversity order for iid or correlated Rayleigh fading channels and also provide design rules for achieving maximum diversity gains with LP-OFDM. Simulated performance comparisons of LP-OFDM with existing block and convolutionally coded OFDM alternatives favor LP-OFDM in a HiperLan2 experiment.",

keywords = "AWGN, Convolution, Convolutional codes, DSL, Digital video broadcasting, Dispersion, Diversity methods, Fading, OFDM, Transmitters",

author = "Zhengdao Wang and Giannakis, {G. B.}",

year = "2001",

month = jan,

day = "1",

doi = "10.1109/SPAWC.2001.923899",

language = "English (US)",

series = "IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "267--270",

booktitle = "2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001",

note = "3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 ; Conference date: 20-03-2001 Through 23-03-2001",