I/Q mismatch cancellation for MIMO-OFDM systems

被引：16

作者：

Rao, RM ^{[1
]}

Daneshrad, B ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Henry Samueli Sch Engn & Appl Sci, Los Angeles, CA 90095 USA

来源：

2004 IEEE 15TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-4, PROCEEDINGS | 2004年

关键词：

analog impairments; RF impairments; I/Q mismatch; I/Q imbalance; MIMO-OFDM;

D O I：

10.1109/PIMRC.2004.1368812

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

MIMO-OFDM systems are gaining prominence in high data rate applications due to their increased spectral efficiency. In MIMO-OFDM systems, I/Q mismatch causes interference between the frequency mirror subcarriers. This can significantly degrade and limit the performance of the system. In this paper, we present a mathematical analysis of the effects of I/Q gain, delay and phase mismatches in MIMO-OFDM systems. We show the impact of I/Q mismatch when more antennas are added. We also derive a linear optimal solution to cancel all three I/Q mismatches and an RLS based adaptive filter for the same. We show simulation results and results on an experimental testbed.

引用

页码：2710 / 2714

页数：5

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