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A Synchronization Technique for OFDM-Based Full Duplex Relays with Frequency-Domain Feedback Interference Canceller
Hyun-Il YOO Kyung-Soo WOO Chang-Hwan PARK Jaekwon KIM Sungyoon JUNG Yong-Soo CHO
Publication
IEICE TRANSACTIONS on Communications
Vol.E92-B
No.11
pp.3487-3490 Publication Date: 2009/11/01 Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.3487 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Transmission Systems and Transmission Equipment for Communications Keyword: full-duplex relays, interference cancellation, OFDM, synchronization,
Full Text: PDF>>
Summary:
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, Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) may occur due to timing mismatch between the feedback interference signal and the desired signal from the Base Station (BS). In this letter, 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.
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