Joint Compensation of IQ Imbalance and Phase Noise in OFDM Wireless Systems

被引：35

作者：

Zou, Qiyue ^{[1
,2
]}

Tarighat, Alireza ^{[1
]}

Sayed, Ali H. ^{[2
]}

机构：

[1] WiLinx Corp, San Diego, CA 90025 USA

[2] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2009年 / 57卷 / 02期

基金：

美国国家科学基金会;

关键词：

Direct-conversion receiver; equalization; IQ imbalance; Orthogonal Frequency Division Multiplexing (OFDM); phase noise; FREQUENCY OFFSET;

D O I：

10.1109/TCOMM.2009.02.060526

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：

Physical impairments like IQ imbalance and phase noise can cause significant degradation in the performance of wireless communication systems. In this paper, the joint effects of IQ imbalance and phase noise on OFDM systems are analyzed, and a compensation scheme is proposed to improve the system performance in the presence of IQ imbalance and phase noise. The scheme consists of a joint estimation of channel and impairment parameters and a joint data symbol estimation algorithm. It is shown both by theory and computer simulations that the proposed scheme can effectively improve the signal-to-noise ratio at the receiver. As a result, the sensitivity of OFDM receivers to the physical impairments can be significantly lowered, simplifying the RF and analog circuitry design in terms of implementation cost, power consumption, and silicon fabrication yield.

引用

页码：404 / 414

页数：11

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