IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136

This article has now been updated. Please use the final version.

Blind frequency-dependent in-phase/quadrature imbalance compensation with constant norm algorithm and cascaded structure
Naoto SasaokaHiroki InataTadao NakagawaRyoto HamabeYoshio Itoh
Author information
JOURNAL FREE ACCESS Advance online publication

Article ID: 2021XBL0021

Details
Abstract

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.

Content from these authors
© 2021 The Institute of Electronics, Information and Communication Engineers
feedback
Top