Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/2946
Title: Training-based Joint Antenna and Relay Selection in Multiuser Downlink Cellular Network with RF Impairments
Authors: Mishra, Anoop Kumar
Singh, Poonam
Keywords: AF relaying
Hardware impairments
Imperfect channel estimation
Outage probability
Asymptotic Analysis
Issue Date: Feb-2018
Citation: 24th National Conference on Communication (NCC 2018) IIT Hyderabad, India, 25 - 28 February, 2018.
Abstract: We analyze the performance of a dual-hop downlink cellular amplify-and-forward cooperative system in the presence of both channel estimation errors and radio frequency (RF) impairments, where multiple antennas are deployed only at the base station (BS) and single-antenna at relay and mobile stations (MS). Specifically, we derive approximate as well as exact closed-form expressions for the outage probability and expected spectral efficiency. In addition, simple asymptotic expressions at the high signal-to-noise ratio (SNR) regime are obtained, which facilitate the characterization of the achievable diversity order of the system. To validate the derived analytical expressions, we presented simulation results which are sufficiently right across the entire range of SNRs. Findings of the paper suggest that full diversity order can be achieved only when the RF front-end hardware is assumed to be perfect, while in practice the imperfections in hardware are inevitable and reduce diversity order of the system. Moreover, the influence of key parameters such as the number of antennas, users, and relays on the system performance has been presented with the influence of the level of RF impairments.
Description: Copyright of this document belongs to proceedings publisher.
URI: http://hdl.handle.net/2080/2946
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