THREE-HOP AF DISTRIBUTED RELAY SYSTEMS UNDER POWER CONSTRAINTS | Zendy

Kanghee Lee | Zendy; Hyuck M. Kwon | Zendy

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THREE-HOP AF DISTRIBUTED RELAY SYSTEMS UNDER POWER CONSTRAINTS

Author(s) -

Kanghee Lee,

Hyuck M. Kwon

Publication year - 2013

Publication title -

progress in electromagnetics research c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 34

ISSN - 1937-8718

DOI - 10.2528/pierc13071202

Subject(s) - relay , hop (telecommunications) , minimum mean square error , bit error rate , mean squared error , wireless , power (physics) , mathematics , control theory (sociology) , signal to noise ratio (imaging) , relay channel , computer science , topology (electrical circuits) , telecommunications , statistics , decoding methods , physics , combinatorics , control (management) , quantum mechanics , estimator , artificial intelligence

This paper proposes an amplify-and-forward (AF) dis- tributed relay network consisting of a one-source-one-destination pair and two-level N relays. Optimal relay amplifying matrices (or vectors) at the relays in the flrst and second levels are determined based on the minimum mean square error (MMSE) criterion. Power is globally, lo- cally, and aggregately constrained at the relays in the flrst and second levels, independently or separately. With the derived optimal relay amplifying matrices, bit error rate (BER), mean square error (MSE) behavior, and the achievable rate are investigated. It is also proven that minimizing the MSE is equal to maximizing the signal-to-noise ratio (SNR) in a three-hop AF wireless relay network.

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