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An Algebraic Coding Scheme for Wireless Relay Networks With Multiple-Antenna Nodes

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2 Author(s)
Oggier, F. ; Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA ; Hassibi, B.

We consider the problem of coding over a half-duplex wireless relay network where both the transmitter and the receiver have respectively several transmit and receive antennas, whereas each relay is a small device with only a single antenna. Since, in this scenario, requiring the relays to decode results in severe rate hits, we propose a full rate strategy where the relays do a simple operation before forwarding the signal, based on the idea of distributed space-time coding. Our scheme relies on division algebras, an algebraic object which allows the design of fully diverse matrices. The code construction is applicable to systems with any number of transmit/receive antennas and relays, and has better performance than random code constructions, with much less encoding complexity. Finally, the robustness of the proposed distributed space-time codes to node failures is considered.

Published in:

Signal Processing, IEEE Transactions on  (Volume:56 ,  Issue: 7 )

Date of Publication:

July 2008

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