Table of Contents
Advances in Electrical Engineering
Volume 2015, Article ID 723805, 7 pages
http://dx.doi.org/10.1155/2015/723805
Research Article

I/Q Imbalance Problem in SC-FDMA System with DCT and DFT Basis Functions

Department of Electronics, Faculty of Engineering and Architecture, Ibb University, Ibb, Yemen

Received 28 August 2014; Revised 8 January 2015; Accepted 10 January 2015

Academic Editor: Ramón M. Rodríguez-Dagnino

Copyright © 2015 F. S. Al-kamali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In-phase/quadrature-phase (I/Q) imbalance is one of the most serious concerns in the practical implementation of the direct conversion receiver architecture. This paper investigates and analyzes the impacts of the I/Q imbalance on the performance of the single-carrier frequency-division multiple access (SC-FDMA) system with different basis functions by computer simulations only. The suitable phase and amplitude of I and Q branches that can be utilized in SC-FDMA system are studied and determined through simulations for different I/Q imbalance scenarios and different subcarrier mapping schemes. Simulation results show that the phase and amplitude of I and Q branches have significant effects on the bit error rate (BER) performance of the SC-FDMA system.