Blind frequency-dependent in-phase/quadrature imbalance compensation with constant norm algorithm and cascaded structure

Increasing carrier frequency and broadening bandwidth speeds up wireless communication, but at the price of a frequency-dependent imbalance between the in-phase/quadrature (IQ) signals in the quadrature modulator/demodulator. We propose a blind compensation system for correcting frequency-dependent...

Full description

Saved in:
Bibliographic Details
Published in:IEICE COMMUNICATIONS EXPRESS 2021/05/01, Vol.10(5), pp.237-242
Main Authors: Sasaoka, Naoto, Inata, Hiroki, Nakagawa, Tadao, Hamabe, Ryoto, Itoh, Yoshio
Format: Article
Language:English
Subjects:
CNA
frequency-dependent IQ-imbalance
OFDM
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Increasing carrier frequency and broadening bandwidth speeds up wireless communication, but at the price of a frequency-dependent imbalance between the in-phase/quadrature (IQ) signals in the quadrature modulator/demodulator. We propose a blind compensation system for correcting frequency-dependent IQ imbalance in orthogonal frequency division multiplexing (OFDM) systems. As the convergence characteristic of conventional blind adaptive algorithms limits their compensation performance, we introduce a constant-norm algorithm (CNA) and cascaded structure. Simulation results show that the proposed scheme improves bit error rate performance in a frequency-dependent IQ imbalance environment.
ISSN:2187-0136
2187-0136
DOI:10.1587/comex.2021XBL0021