Open AccessIQ imbalance analysis and compensation in multiple antenna systems
Author(s) -
AbdEllatif Aly Mahmoud,
Mehana Ahmed Hesham,
Fahmy Yasmine
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2019.0948
Subject(s) - rayleigh fading , computer science , monte carlo method , antenna (radio) , quadrature (astronomy) , base station , compensation (psychology) , fading , channel (broadcasting) , algorithm , electronic engineering , control theory (sociology) , telecommunications , mathematics , statistics , engineering , psychology , control (management) , artificial intelligence , psychoanalysis
This study analyses in‐phase and quadrature‐phase imbalance (IQI) in large‐scale multiple antenna systems and Rayleigh fading channel. Specifically, the authors compare between different approaches (using pilot‐based or blind channel estimation processes) to remove the IQI effect at a base station equipped with massive number of antennas. They obtain closed‐form expression for the asymptotic achievable rate when using IQI removal algorithm and zero‐forcing data detection. They also provide complexity analysis for the proposed solutions and show, by means of Monte Carlo simulations, that the proposed algorithm improves the system performance even for small number of antennas.