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

被引：63

作者：

Ma, XL ^{[1
]}

Oh, MK

Giannakis, GB

Park, DJ

机构：

[1] Auburn Univ, Dept Elect & Comp Engn, Auburn, AL 36849 USA

[2] Korea Adv Inst Sci & Technol, Dept Elect & Comp Sci, Taejon 305701, South Korea

[3] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2005年 / 53卷 / 01期

关键词：

carrier frequency offset (CFO); Cramer-Rao lower bound; frequency-selective channel; multi-input multi-output (MIMO)-orthogonal frequency-division multiplexing (OFDM); null subcarriers; pilot symbols;

D O I：

10.1109/TCOMM.2004.840663

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：162 / 172

页数：11

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