A Synchronization Technique for Frequency-Domain Feedback Interference Canceller in OFDM-Based Full Duplex Relays

Author

Yoo, Hyun Il ; Woo, Kyung Soo ; Park, Chang Hwan ; Kim, Jaekwon ; Jung, Sungyoon ; Cho, Yong Soo

Author_Institution

Sch. of Electr. & Electron. Eng., Chung-Ang Univ., Seoul, South Korea

fYear

2009

fDate

20-23 Sept. 2009

Firstpage

1

Lastpage

5

Abstract

In a Decode and Forward (DF) type of an OFDM-based Full Duplex Relay (FDR), the frequency-domain approach is more efficient than the time-domain approach for feedback interference cancellation. However, an Inter-Symbol Interference (ISI) and an Inter-Carrier Interference (ICI) may occur due to a timing mismatch between the feedback interference signal and the desired signal from the Base Station (BS) when feedback interference cancellation is performed in the frequency domain. In this paper, the effects of a timing mismatch on synchronous types and asynchronous types of OFDM-based FDRs are investigated in uplink and downlink cases. A synchronization procedure and techniques for minimizing ISI and ICI in OFDM-based FDRs with a frequency-domain feedback interference canceller are proposed.

Keywords

OFDM modulation; intercarrier interference; intersymbol interference; synchronisation; OFDM-based full duplex relays; frequency-domain feedback interference canceller; inter-carrier interference; inter-symbol interference; synchronization technique; Base stations; Decoding; Feedback; Frequency domain analysis; Frequency synchronization; Interference cancellation; Intersymbol interference; Relays; Time domain analysis; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th

Conference_Location

Anchorage, AK

ISSN

1090-3038

Print_ISBN

978-1-4244-2514-3

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2009.5378669

Filename

5378669