Digital Baseband Compensation for Mobile SFBC-OFDM Systems with Receiver I/Q Imbalance

被引：1

作者：

Narasimhan, Balachander ^{[1
]}

Wang, Dandan ^{[1
]}

Narayanan, Sudharshan ^{[1
]}

Al-Dhahir, Naofal ^{[1
]}

Minn, Hlaing ^{[1
]}

机构：

[1] Univ Texas Dallas, Erik Jonsson Sch Engn & Comp Sci, Richardson, TX 75080 USA

来源：

GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE | 2008年

关键词：

D O I：

10.1109/GLOCOM.2008.ECP.628

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：

In-phase and Quadrature-phase (I/Q) imbalance is a major performance-limiting impairment for direct-conversion Orthogonal Frequency Division Multiplexing (OFDM) transceivers. I/Q imbalance degrades the Signal-to-Noise-Ratio in an OFDM system by causing Inter-Channel-Interference (ICI) between image subcarriers. Doppler spread due to mobility also causes ICI but mainly between adjacent subcarriers. In this work, we investigate the combined effects of mobility and I/Q imbalance in a Multiple-Input-Multiple-Output-OFDM system with the Alamouti Space-Frequency Block-Coding scheme and design an effective compensation technique. Furthermore, we propose a novel pilot allocation and channel estimation scheme, and exploit the problem structure to reduce complexity.

引用

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