Optimal training and redundant precoding for block transmissions with application to wireless OFDM

Shuichi Ohno; Georgios B. Giannakis

doi:10.1109/TCOMM.2002.806547

Optimal training and redundant precoding for block transmissions with application to wireless OFDM

Shuichi Ohno, Georgios B. Giannakis

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

180 Scopus citations

Abstract

The adoption of orthogonal frequency-division multiplexing by wireless local area networks and audio/video broadcasting standards testifies to the importance of recovering block precoded transmissions propagating through frequency-selective finite-impulse response (FIR) channels. Existing block transmission standards invoke bandwidth-consuming error control codes to mitigate channel fades, and training sequences to identify the FIR channels. To enable block-by-block receiver processing, we design redundant precoders with cyclic prefix and superimposed training sequences for optimal channel estimation and guaranteed symbol detectability, regardless of the underlying frequency-selective FIR channels. Numerical results are presented to access the performance of the designed training and precoding schemes.

Original language	English (US)
Pages (from-to)	2113-2123
Number of pages	11
Journal	IEEE Transactions on Communications
Volume	50
Issue number	12
DOIs	https://doi.org/10.1109/TCOMM.2002.806547
State	Published - Dec 2002

Bibliographical note

Funding Information:
Paper approved by P. Y. Kam, the Editor for Modulation and Detection for Wireless Systems of the IEEE Communications Society. Manuscript received November 22, 2000; revised October 28, 2001 and June 28, 2002. The work of G. B. Giannakis was supported by the National Science Foundation Wireless Initiative under Grant 9979442. This paper was presented in part at the International Conference on Communications, Helsinki, Finland, June 11–15, 2001.

Keywords

Block transmissions
Channel estimation
Multi-path
Orthogonal frequency-division multiplexing (OFDM)
Pilot tones

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title = "Optimal training and redundant precoding for block transmissions with application to wireless OFDM",

abstract = "The adoption of orthogonal frequency-division multiplexing by wireless local area networks and audio/video broadcasting standards testifies to the importance of recovering block precoded transmissions propagating through frequency-selective finite-impulse response (FIR) channels. Existing block transmission standards invoke bandwidth-consuming error control codes to mitigate channel fades, and training sequences to identify the FIR channels. To enable block-by-block receiver processing, we design redundant precoders with cyclic prefix and superimposed training sequences for optimal channel estimation and guaranteed symbol detectability, regardless of the underlying frequency-selective FIR channels. Numerical results are presented to access the performance of the designed training and precoding schemes.",

keywords = "Block transmissions, Channel estimation, Multi-path, Orthogonal frequency-division multiplexing (OFDM), Pilot tones",

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AB - The adoption of orthogonal frequency-division multiplexing by wireless local area networks and audio/video broadcasting standards testifies to the importance of recovering block precoded transmissions propagating through frequency-selective finite-impulse response (FIR) channels. Existing block transmission standards invoke bandwidth-consuming error control codes to mitigate channel fades, and training sequences to identify the FIR channels. To enable block-by-block receiver processing, we design redundant precoders with cyclic prefix and superimposed training sequences for optimal channel estimation and guaranteed symbol detectability, regardless of the underlying frequency-selective FIR channels. Numerical results are presented to access the performance of the designed training and precoding schemes.

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Optimal training and redundant precoding for block transmissions with application to wireless OFDM

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