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
收藏
页码：2710 / 2714
页数：5
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