Wiener-based ICI Cancellation Schemes for OFDM Systems over Fading Channels

Jyh-Horng Wen1, Yung-Cheng Yao2 and Ying-Chih Kuo3

  1. Department of Electrical Engineering, Tunghai University
    No. 181, Section 3, Taichung Port Road, Taichung City 40704, Taiwan
    jhwen@thu.edu.tw
  2. Department of Electrical Engineering, National Chung Cheng University
    168 University Road, Minhsiung Township, Chiayi County 62102, Taiwan
    yaoyc@thu.edu.tw
  3. Institute of Communications Engineering, National Chung Cheng University
    168 University Road, Minhsiung Township, Chiayi County 62102, Taiwan
    ying@mail.ktc.com.tw

Abstract

The subcarriers of orthogonal frequency division multiplexing (OFDM) systems may fail to keep orthogonal to each other under time-varying channels. The loss of orthogonality among the subcarriers will degrade the system performace, and this effect is named intercarrier interference (ICI). In this paper, a Wiener-based successive interference cancellation (SIC) scheme is proposed to detect the OFDM signals. It provides good ICI cancellation performance; however, it suffers large computation complexity. Therefore, a modified Wiener-based SIC scheme is further proposed to reduce the computation complexity. Simulation results show the performance of the Wiener-based SIC scheme is better than those of zero forcing, zero forcing plus SIC and original Wiener-based schemes. Furthermore, with the modified Wiener-based SIC scheme, the performance is still better than the others. Although the performace of the modified Wiener-based SIC scheme suffers little degradation compared to Wiener-based SIC scheme, the computation complexity can be dramatically reduced.

Key words

Orthogonal frequency division multiplexing (OFDM), fading channels, intercarrier interference (ICI), Wiener-based, successive interference cancellation (SIC)

Digital Object Identifier (DOI)

https://doi.org/10.2298/CSIS120722039W

Publication information

Volume 10, Issue 2 (April 2013)
Special Issue on Advances on Mobile Collaborative Systems
Year of Publication: 2013
ISSN: 1820-0214 (Print) 2406-1018 (Online)
Publisher: ComSIS Consortium

Full text

DownloadAvailable in PDF
Portable Document Format

How to cite

Wen, J., Yao, Y., Kuo, Y.: Wiener-based ICI Cancellation Schemes for OFDM Systems over Fading Channels. Computer Science and Information Systems, Vol. 10, No. 2, 877-896. (2013)