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On the pilot-data power trade off in single input multiple output system
KTH, School of Electrical Engineering (EES), Industrial Information and Control Systems.ORCID iD: 0000-0002-2289-3159
2014 (English)In: European Wireless 2014; 20th European Wireless Conference (EW 2014), Berlin: IEEE conference proceedings, 2014, 485-492 p.Conference paper, Published paper (Other academic)
Abstract [en]

We consider a single cell single input multiple output (SIMO) system employing orthogonal frequency division multiplexing (OFDM). In such systems, setting the pilot-to-data power ratio (PDPR) has a large impact on the spectral and energy efficiency. In this paper we provide a closed form solution for the mean square error (MSE) of the received data as a function of the PDPR assuming Gaussian channels and minimum mean square error (MMSE) equalization. In numerical experiments we find that the MSE is a convex function of the PDPR and study the PDPR that minimizes the MSE as the number of antennas at the base station (BS) grows large. We find that the MSE-minimizing PDPR heavily depends on the number of antennas and the path loss between the mobile station and the BS. Specifically, as the number of antennas grows large, a larger portion of the total power budget needs to be allocated for pilot signals, especially for low path loss users. 

Place, publisher, year, edition, pages
Berlin: IEEE conference proceedings, 2014. 485-492 p.
Keyword [en]
Cellular networks; Channel estimation; MIMO systems; Power control
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-203037Scopus ID: 2-s2.0-84916886482OAI: oai:DiVA.org:kth-203037DiVA: diva2:1082150
Conference
European Wireless 2014
Note

QC 20170321

Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2017-03-21Bibliographically approved

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Fodor, Gabor

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Citation style
  • apa
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  • de-DE
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  • fi-FI
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Output format
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