Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/625899
Title: On the Impact of Antenna Correlation and CSI Errors on the Pilot-to-Data Power Ratio
Authors: Gábor Fodor;Piergiuseppe Di Marco;Miklós Telek
subject: estimation techniques|multi-antenna systems|receiver algorithms|channel state information
Year: 2016
Publisher: IEEE
Abstract: In systems employing pilot-symbol aided channel estimation, the pilot-to-data power ratio is known to have a large impact on performance. Therefore, previous works proposed methods setting the pilot power such that either the weighted sum of the mean squared error (MSE) of the estimated data symbols is minimized or the overall spectral efficiency (SE) is maximized. However, previous works did not take into account the impact of correlated antennas and channel state information (CSI) errors on the optimal pilot power setting. In this paper, we consider the uplink of a multiuser multiple-input multiple-output (MU MIMO) system employing a receiver that minimizes the MSE of the received data symbols in the presence of CSI errors and derive closed-form expressions for the MSE and the achievable SE. These expressions take into account the impact of antenna correlation and CSI errors, and are a function of pilot power and the number of receive antennas. The analytical and numerical results can help set the pilot power, minimizing the MSE in multiple antenna systems.
Description: 
URI: http://localhost/handle/Hannan/151887
http://localhost/handle/Hannan/625899
ISSN: 0090-6778
volume: 64
issue: 6
Appears in Collections:2016

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Title: On the Impact of Antenna Correlation and CSI Errors on the Pilot-to-Data Power Ratio
Authors: Gábor Fodor;Piergiuseppe Di Marco;Miklós Telek
subject: estimation techniques|multi-antenna systems|receiver algorithms|channel state information
Year: 2016
Publisher: IEEE
Abstract: In systems employing pilot-symbol aided channel estimation, the pilot-to-data power ratio is known to have a large impact on performance. Therefore, previous works proposed methods setting the pilot power such that either the weighted sum of the mean squared error (MSE) of the estimated data symbols is minimized or the overall spectral efficiency (SE) is maximized. However, previous works did not take into account the impact of correlated antennas and channel state information (CSI) errors on the optimal pilot power setting. In this paper, we consider the uplink of a multiuser multiple-input multiple-output (MU MIMO) system employing a receiver that minimizes the MSE of the received data symbols in the presence of CSI errors and derive closed-form expressions for the MSE and the achievable SE. These expressions take into account the impact of antenna correlation and CSI errors, and are a function of pilot power and the number of receive antennas. The analytical and numerical results can help set the pilot power, minimizing the MSE in multiple antenna systems.
Description: 
URI: http://localhost/handle/Hannan/151887
http://localhost/handle/Hannan/625899
ISSN: 0090-6778
volume: 64
issue: 6
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7445825.pdf1.09 MBAdobe PDFThumbnail
Preview File
Title: On the Impact of Antenna Correlation and CSI Errors on the Pilot-to-Data Power Ratio
Authors: Gábor Fodor;Piergiuseppe Di Marco;Miklós Telek
subject: estimation techniques|multi-antenna systems|receiver algorithms|channel state information
Year: 2016
Publisher: IEEE
Abstract: In systems employing pilot-symbol aided channel estimation, the pilot-to-data power ratio is known to have a large impact on performance. Therefore, previous works proposed methods setting the pilot power such that either the weighted sum of the mean squared error (MSE) of the estimated data symbols is minimized or the overall spectral efficiency (SE) is maximized. However, previous works did not take into account the impact of correlated antennas and channel state information (CSI) errors on the optimal pilot power setting. In this paper, we consider the uplink of a multiuser multiple-input multiple-output (MU MIMO) system employing a receiver that minimizes the MSE of the received data symbols in the presence of CSI errors and derive closed-form expressions for the MSE and the achievable SE. These expressions take into account the impact of antenna correlation and CSI errors, and are a function of pilot power and the number of receive antennas. The analytical and numerical results can help set the pilot power, minimizing the MSE in multiple antenna systems.
Description: 
URI: http://localhost/handle/Hannan/151887
http://localhost/handle/Hannan/625899
ISSN: 0090-6778
volume: 64
issue: 6
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7445825.pdf1.09 MBAdobe PDFThumbnail
Preview File