NDLI: Pilot-assisted channel estimation without feedback for bi-directional broadband ANC

Content Provider	IEEE Xplore Digital Library
Author	Prodan, I. Obara, T. Adachi, F. Gacanin, H.
Copyright Year	2011
Description	Author affiliation: Alcatel-Lucent Bell N.V., Antwerp, Belgium (Gacanin, H.) \|\| Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University Sendai, Japan (Prodan, I.; Obara, T.; Adachi, F.)
Abstract	Broadband analog network coding (ANC) has been recently introduced to increase the network capacity by exploiting the broadcasting nature of the wireless channel. However, channel state information (CSI) knowledge is required for self-information removal and signal detection. Recently, a pilot-assisted channel estimation (PACE) scheme has been presented for broadband ANC, where feedback of the channel estimates from the relay to the users is required. In this work, we introduce a PACE scheme without feedback from the relay for broadband ANC using orthogonal frequency-division multiplexing (OFDM). In the first time slot the users transmit their respective pilots to the relay and in the second time slot the relay simply amplifies and forwards the received pilot signals to both users. Each user can then estimate all the CSI it needs for self-information removal and coherent signal detection, without requiring any feedback from the relay. The bit error rate (BER) performance of broadband ANC using the proposed PACE is evaluated by computer simulation. It was shown that the proposed PACE scheme causes only a slight BER performance degradation compared to the conventional PACE scheme while eliminating the feedback channel requirement.
Starting Page	157
Ending Page	162
File Size	1044660
Page Count	6
File Format	PDF
ISBN	9781457703898
e-ISBN	9781457703904
DOI	10.1109/APCC.2011.6152796
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-02
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Channel estimation Broadband communication Bit error rate OFDM Wireless communication Degradation channel estimation Broadband ANC
Content Type	Text
Resource Type	Article

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