Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/95
Title: Cognitive Networks in the Presence of I/Q Imbalance and Imperfect CSI: Receiver Design and Performance Analysis
Authors: Alsmadi, Malek Mohammad
Canbilen, Ayşe Elif
Abu Ali, Najah
Ikki, Salama Said
Başar, Ertuğrul
Keywords: Channel Estimation Errors
Cognitive Radio
Cramer-Rao Lower Bound
Error Performance Analysis
Hardware Impairments
I/Q Imbalance
Hardware Impairments
Spatial Modulation
Energy Detection
Iq-Imbalance
Compensation
Circularity
Systems
Radio
Issue Date: 2019
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract: Future wireless communication systems, including fifth-generation (5G) networks and the Internet of Things (IoT), require a massive number of inexpensive transceivers. These transceivers come with various hardware impairments, such as phase noise and in-phase/quadrature phase (I/Q) imbalance. This piece of work studies the performance of underlay cognitive radio (CR) networks, considering the joint effect of I/Q imbalance and imperfect channel-state information (CSI) at the secondary user. In order to mitigate the effect of I/Q imbalance, an optimal maximum likelihood (ML) receiver design is proposed and analyzed. Specifically, a closed-form expression of the average pairwise error probability (APEP) and a tight upper bound of the average bit error rate (ABER) are derived. In addition, a widely linear equalization (WLE) receiver that has performance close to the optimal receiver with a computational complexity close to the traditional blind receiver is proposed. In particular, the exact PEP of this WLE receiver is obtained and its APEP is calculated numerically. Moreover, an exact expression is derived for Cramer-Rao lower bound (CRLB) of the secondary system receiver channel estimation error in the presence of I/Q imbalance at the secondary transmitter/receiver (STx/SRx) sides. Computer simulations prove the analytical results of the proposed receivers. The obtained results show that the optimal receiver has the best performance and the WLE receiver outperforms the traditional ML receiver in most cases. In addition, the analysis shows that the best estimator that reaches the CRLB is not affected by the I/Q imbalance at STx/SRx.
URI: https://doi.org/10.1109/ACCESS.2019.2908787
https://hdl.handle.net/20.500.13091/95
ISSN: 2169-3536
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

Show full item record

CORE Recommender

SCOPUSTM   
Citations

8
checked on Feb 4, 2023

WEB OF SCIENCETM
Citations

10
checked on Jan 30, 2023

Page view(s)

44
checked on Feb 6, 2023

Download(s)

10
checked on Feb 6, 2023

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.