NDLI: High-rate, single-symbol decodable distributed STBCs for partially-coherent cooperative networks

Content Provider	IEEE Xplore Digital Library
Author	Sreedhar, D. Chockalingam, A. Rajan, B.S.
Copyright Year	2008
Description	Author affiliation: Dept. of ECE, Indian Inst. of Sci., Bangalore (Sreedhar, D.; Chockalingam, A.; Rajan, B.S.)
Abstract	Space-time block codes (STBCs) that are single-symbol decodable (SSD) in a co-located multiple antenna setting need not be SSD in a distributed cooperative communication setting. A relay network with N relays and a single source-destination pair is called a partially-coherent relay channel (PCRC) if the destination has perfect channel state information (CSI) of all the channels and the relays have only the phase information of the source-to-relay channels. In our earlier work, we had derived a set of necessary and sufficient conditions for a distributed STBC (DSTBC) to be SSD for a PCRC. Using these conditions, in this paper we show that the possibility of channel phase compensation operation at the relay nodes using partial CSI at the relays increases the possible rate of SSD DSTBCs from 2/N when the relays do not have CSI to 1/2 , which is independent of N. We also show that when a DSTBC is SSD for a PCRC, then arbitrary coordinate interleaving of the in-phase and quadrature-phase components of the variables does not disturb its SSD property. Using this property we are able to construct codes that are SSD and have higher rate than 2/N but giving full diversity only for signal constellations satisfying certain conditions.
Starting Page	2538
Ending Page	2542
File Size	277139
Page Count	5
File Format	PDF
ISBN	9781424422562
DOI	10.1109/ISIT.2008.4595449
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-06
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Decoding Resource management Antennas Noise Sufficient conditions Fading single-symbol decoding Cooperative communications amplify-and-forward protocol distributed STBC
Content Type	Text
Resource Type	Article

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