Joint compensation of IQ imbalance and frequency offset in OFDM systems

被引：0

作者：

Tubbax, J ^{[1
]}

Côme, B ^{[1
]}

Van der Perre, L ^{[1
]}

Donnay, S ^{[1
]}

Engels, M ^{[1
]}

Moonen, M ^{[1
]}

De Man, H ^{[1
]}

机构：

[1] IMEC, Louvain, Belgium

来源：

BOSTON 2003 RADIO & WIRELESS RAWCON CONFERENCE, PROCEEDINGS | 2003年

关键词：

D O I：

暂无

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：

Zero-IF receivers are gaining interest because of their potential to enable low-cost OFDM terminals. However, Zero-IF receivers introduce IQ imbalance which may have a huge impact on the performance. Rather than increasing design time or component cost to decrease the IQ imbalance, an alternative is to tolerate the IQ imbalance and compensate it digitally. Current solutions require extra analog hardware or converge too slowly for bursty communication. Moreover, the tremendous impact of a frequency offset on the IQ estimation/compensation problem is not considered. In this paper, we analyze the joint IQ imbalance-frequency offset estimation and propose a low-cost, highly effective, all-digital compensation scheme. For large IQ imbalance (epsilon = 10%, Deltaphi = 10degrees) and large frequency offsets, our solution results in an average implementation loss below 0.5 dB. It therefore enables the design of low-cost, low-complexity OFDM receivers.

引用

页码：39 / 42

页数：4

共 14 条

[1]

Bouras I, 2003, ISSCC DIG TECH PAP I, V46, P352

[2]

*IEEE, 1999, 80211A1999 IEEE 11

[3] Broadband wireless access solutions based on OFDM access in IEEE 802.16 [J].