Digital Baseband Compensation of Joint TX/RX Frequency-Dependent I/Q Imbalance in Mobile MIMO-OFDM Transceivers

被引：2

作者：

Narasimhan, Balachander ^{[1
]}

Narayanan, Sudharsan ^{[1
]}

Al-Dhahir, Naofal ^{[1
]}

Minn, Hlaing ^{[1
]}

机构：

[1] Univ Texas Dallas, Dept Elect Engn, Dallas, TX 75230 USA

来源：

2009 43RD ANNUAL CONFERENCE ON INFORMATION SCIENCES AND SYSTEMS, VOLS 1 AND 2 | 2009年

关键词：

OFDM; MIMO; I/Q imbalance; MMSE; Equalization; Mobility; ICI; TRANSMITTER;

D O I：

10.1109/CISS.2009.5054780

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Direct-conversion Orthogonal Frequency Division Multiplexing (OFDM) systems suffer from transmit and receive analog processing impairments such as Inphase/Quadrature (I/Q) imbalance causing Inter-Carrier Interference (ICI) between the sub-carriers. Another source of performance-limiting ICI, but with a different nature, in OFDM systems is Doppler spread due to mobility. Unlike previous work which considered these two problems separately, we develop a generalized analytical framework to characterize, estimate and jointly mitigate ICI due to both I/Q imbalance and high mobility. Based on our general model, we exploit the special ICI structure to design efficient channel and I/Q imbalance parameter estimation and digital baseband compensation schemes for joint transmit/receive frequency-independent and frequency-dependent I/Q imbalance under high-mobility conditions. Moreover, we extend the model, compensation and channel estimation methods to the Multiple Input Multiple Output (MIMO) case, Spatial Multiplexing (SM) in particular.

引用

页码：545 / 550

页数：6

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