Outage Behavior and SCK-Based Approaching Optimum Power Allocation in the Two-Way Channel

Xuan GENG  Fang CAO  Qi-ming SHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.12   pp.3906-3910
Publication Date: 2012/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3906
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
two-way,  outage probability,  power allocation,  SCK,  NAF,  

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Summary: 
In this letter, non-orthogonal amplify-and-forward (NAF) is considered in a half-duplex two-way system. We derive the closed-form outage probability in the high signal-to-noise ratio (SNR) region, and approximate it with a simpler version to enable power allocation. Then a closed-form power allocation scheme is proposed to improve the outage performance; it uses only statistical channel knowledge (SCK). It is validated that our analyses agree with simulation results and the proposed power allocation approaches the optimal power allocation.