A composite LMMSE channel estimator for spectrum-efficient OFDM transmit diversity

Jeong Wook Seo; Won Gi Jeon; Jong Ho Paik; Minho Jo; Dong Ku Kim

doi:10.3837/tiis.2008.04.004

A composite LMMSE channel estimator for spectrum-efficient OFDM transmit diversity

Jeong Wook Seo, Won Gi Jeon, Jong Ho Paik, Minho Jo, Dong Ku Kim

Department of Electrical and Electronic Engineering

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

3 Citations (Scopus)

Abstract

In this paper, we propose a subcarrier allocation method and a composite linear minimum mean square error (LMMSE) channel estimator to increase spectrum efficiency in orthogonal frequency division multiplexing (OFDM) transmit diversity. The pilot symbols for OFDM transmit (Alamouti) diversity are exclusively allocated in two OFDM symbols in different antennas, which causes serious degradation of spectrum efficiency. To reduce the number of pilot symbols, our subcarrier allocation method uses repetition-coded data symbols, and the proposed channel estimator maintains good bit error rate (BER) performance.

Original language	English
Pages (from-to)	209-221
Number of pages	13
Journal	KSII Transactions on Internet and Information Systems
Volume	2
Issue number	4
DOIs	https://doi.org/10.3837/tiis.2008.04.004
Publication status	Published - 2008 Aug

All Science Journal Classification (ASJC) codes

Information Systems
Computer Networks and Communications

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10.3837/tiis.2008.04.004

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AU - Paik, Jong Ho

AU - Jo, Minho

AU - Kim, Dong Ku

PY - 2008/8

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AB - In this paper, we propose a subcarrier allocation method and a composite linear minimum mean square error (LMMSE) channel estimator to increase spectrum efficiency in orthogonal frequency division multiplexing (OFDM) transmit diversity. The pilot symbols for OFDM transmit (Alamouti) diversity are exclusively allocated in two OFDM symbols in different antennas, which causes serious degradation of spectrum efficiency. To reduce the number of pilot symbols, our subcarrier allocation method uses repetition-coded data symbols, and the proposed channel estimator maintains good bit error rate (BER) performance.

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A composite LMMSE channel estimator for spectrum-efficient OFDM transmit diversity

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