NDLI: Dynamic decode and forward for the multi-access relay channel with finite block length

Content Provider	IEEE Xplore Digital Library
Author	Chung-Pi Lee Hsuan-Jung Su
Copyright Year	2011
Description	Author affiliation: Graduate Institute of Communication Engineering, Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan (Chung-Pi Lee; Hsuan-Jung Su)
Abstract	The dynamic decode-and-forward (DDF) protocol for the multiple access relay channel (MARC) with quasi static fading is evaluated using the Zheng-Tse diversity-multiplexing tradeoff (DMT). We assume that there are two users, one half-duplex relay, and a common destination, each equipped with single antenna. For the Rayleigh fading channel, the DDF protocol is well known and has been analyzed in terms of the DMT with the infinite block length assumption by Azarian et al. However, to make the protocol feasible, the practical constraint of finite block length must be enforced, which may result in a loss in the DMT. Another practical effect not considered in the infinite block length DDF protocol is the possible decoding error at the relay. By carefully dealing with these practical issues due to finite block length, we characterize the finite block length DMT of the DDF protocol. We further consider the situation where the destination does not have a priori knowledge of the relay decision time at which the relay switches from listening to transmitting, and show that the optimal DMT is still achievable as if there is no decoding error at the relay. Therefore, the assumption of error-free decoding at the relay and additional protocol overhead to communicate the decision time are not needed for the DDF to achieve the optimal DMT.
Starting Page	1825
Ending Page	1829
File Size	666240
Page Count	5
File Format	PDF
ISBN	9781457713460
e-ISBN	9781457713484
e-ISBN	9781457713477
DOI	10.1109/PIMRC.2011.6139823
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-11
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Decoding Protocols Multiplexing Fading Upper bound Antennas
Content Type	Text
Resource Type	Article

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