NDLI: Performance Analysis of Multiple-Relay AF Cooperative Systems Over Rayleigh Time-Selective Fading Channels With Imperfect Channel Estimation

Content Provider	IEEE Xplore Digital Library
Author	Khattabi, Y.M. Matalgah, M.M.
Copyright Year	1967
Abstract	In this paper, we consider the adaptive-gain M-relay amplify and-forward (AF) cooperative system with both conventional relaying (cr), as well as a best-relay-selection (br) scheme, and investigate its performance over time-selective fading, due to nodes' mobility, in the presence of channel estimation errors. We first derive exact closed-form expressions for the destination's direct path and overall end-to-end instantaneous signal to-noise ratios (SNRs). We also derive closed-form tight approximate expressions for the system average bit error rate, outage probability, and Shann on capacity, which are general functions of the cooperating nodes' relative speeds, in terms of the links' correlation parameters, the estimation errors' variances, and the receivers' tracking loops' channel estimation rates, in terms of the transmitted block length. Our analysis reveals that due to the cooperating nodes' mobility, the system performance metrics are severely degraded and, in some particular network circumstances, experience asymptotic limits. In addition, when both of the source and the destination are static, the system performance does not experience asymptotic limits although the relays are in motion. On the other hand, despite that the relays are static, the mobility of either the source or the destination severely impacts the system performance by asymptotic limits, where the difference between their impacts depends on the symmetrical conditions of the network two-hop fading gain power. In addition, we found that the br provides higher asymptotic error limits than that of the cr scheme. We also assumed the special case when the network receivers are equipped with fast estimation loops and showed their effect of reducing the degradation impacts of the nodes' mobility. Simulation and numerical results are provided to verify the accuracy of the derived analytical expressions.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	427
Ending Page	434
Page Count	8
File Size	1269521
File Format	PDF
ISSN	00189545
Volume Number	65
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Relays Estimation Cooperative systems System performance Channel estimation Bit error rate Channel State Information and Estimation Cooperative Networks Amplify-and-Forward Time-Selective Fading time-selective fading Amplify-and-forward (AF) channel state information (CSI) and estimation cooperative networks
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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