Title :
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
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;
Conference_Titel :
Vehicular Technology Conference Fall (VTC 2009-Fall), 2009 IEEE 70th
Conference_Location :
Anchorage, AK
Print_ISBN :
978-1-4244-2514-3
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2009.5378669
