Hopping pilots for estimation of frequency-offset and multiantenna channels in MIMO-OFDM

Xiaoli Ma; Mi Kyung Oh; Georgios B. Giannakis; Dong Jo Park

doi:10.1109/TCOMM.2004.840663

Hopping pilots for estimation of frequency-offset and multiantenna channels in MIMO-OFDM

Xiaoli Ma, Mi Kyung Oh, Georgios B. Giannakis, Dong Jo Park

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

80 Scopus citations

Abstract

We design pilot-symbol-assisted modulation for carrier frequency offset (CFO) and channel estimation in orthogonal frequency-division multiplexing transmissions over multi-input multi-output frequency-selective fading channels. The CFO and channel-estimation tasks rely on null-subcarrier and nonzero pilot symbols that we insert and hop from block to block. Because we separate CFO and channel estimation from symbol detection, the novel training patterns lead to further decoupled CFO and channel estimators. The performance of our algorithms is investigated analytically, and then compared with an existing approach by simulations.

Original language	English (US)
Pages (from-to)	162-172
Number of pages	11
Journal	IEEE Transactions on Communications
Volume	53
Issue number	1
DOIs	https://doi.org/10.1109/TCOMM.2004.840663
State	Published - Jan 1 2005

Keywords

Carrier frequency offset (CFO)
Cramér-Rao lower bound
Frequency-selective channel
Multi-input multi-output (MIMO),Orthogonal frequency-division multiplexing (OFDM)
Null subcarriers
Pilot symbols

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10.1109/TCOMM.2004.840663

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title = "Hopping pilots for estimation of frequency-offset and multiantenna channels in MIMO-OFDM",

abstract = "We design pilot-symbol-assisted modulation for carrier frequency offset (CFO) and channel estimation in orthogonal frequency-division multiplexing transmissions over multi-input multi-output frequency-selective fading channels. The CFO and channel-estimation tasks rely on null-subcarrier and nonzero pilot symbols that we insert and hop from block to block. Because we separate CFO and channel estimation from symbol detection, the novel training patterns lead to further decoupled CFO and channel estimators. The performance of our algorithms is investigated analytically, and then compared with an existing approach by simulations.",

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AU - Ma, Xiaoli

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AU - Giannakis, Georgios B.

AU - Park, Dong Jo

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AB - We design pilot-symbol-assisted modulation for carrier frequency offset (CFO) and channel estimation in orthogonal frequency-division multiplexing transmissions over multi-input multi-output frequency-selective fading channels. The CFO and channel-estimation tasks rely on null-subcarrier and nonzero pilot symbols that we insert and hop from block to block. Because we separate CFO and channel estimation from symbol detection, the novel training patterns lead to further decoupled CFO and channel estimators. The performance of our algorithms is investigated analytically, and then compared with an existing approach by simulations.

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KW - Cramér-Rao lower bound

KW - Frequency-selective channel

KW - Multi-input multi-output (MIMO),Orthogonal frequency-division multiplexing (OFDM)

KW - Null subcarriers

KW - Pilot symbols

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