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- Title
Opportunistic Multiple Relay Selection for Two-Way Relay Networks with Outdated Channel State Information.
- Authors
Sijia Lou; Longxiang Yang
- Abstract
Outdated Channel State Information (CSI) was proved to have negative effect on performance in two-way relay networks. The diversity order of widely used opportunistic relay selection (ORS) was degraded to unity in networks with outdated CSI. This paper proposed a multiple relay selection scheme for amplify-and-forward (AF) based two-way relay networks (TWRN) with outdated CSI. In this scheme, two sources exchange information through more than one relays. We firstly select N best relays out of all candidate relays with respect to signal-noise ratio (SNR). Then, the ratios of the SNRs on the rest of the candidate relays to that of the Nth highest SNR are tested against a normalized threshold μ∊[0, 1], and only those relays passing this test are selected in addition to the N best relays. Expressions of outage probability, average bit error rate (BER) and ergodic channel capacity were obtained in closed-form for the proposed scheme. Numerical results and Simulations verified our theoretical analyses, and showed that the proposed scheme had significant gains comparing with conventional ORS.
- Subjects
INFORMATION sharing; SIGNAL-to-noise ratio; PROBABILITY theory; COMPUTER simulation; BIT error rate
- Publication
KSII Transactions on Internet & Information Systems, 2014, Vol 8, Issue 2, p389
- ISSN
1976-7277
- Publication type
Article
- DOI
10.3837/tiis.2014.02.004