Efficient Signaling Schemes for mmWave LOS MIMO Communication Using Uniform Linear and Circular Arrays

Surabhi, G D and Chockalingam, A (2017) Efficient Signaling Schemes for mmWave LOS MIMO Communication Using Uniform Linear and Circular Arrays. In: IEEE 85th Vehicular Technology Conference (VTC Spring), JUN 04-07, 2017, Sydney, AUSTRALIA.

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Abstract

High spatial correlation in line-of-sight multiple-input multiple-output (LOS MIMO) channels in mmWave communication is a cause for the channel matrices to have low rank. However, with proper placement of the transmit and receive antennas, the channel matrix can be made full/high rank. While optimum placements for full rank can be realized with uniform linear arrays (ULA), this may not be the case with uniform circular arrays (UCA). This motivates the need to investigate efficient signaling schemes for LOS MIMO schemes for different array configurations. Accordingly, in this work, we study various signaling schemes including spatial multiplexing (SMP), spatial modulation (SM), and generalized spatial modulation (GSM) in the context of both ULA and UCA. Our analytical and simulation results show that GSM achieves better performance compared to SMP and SM. We also propose a new signaling scheme, termed as subarray index modulation (SAIM) scheme, where groups of antennas in the array (subarrays) are indexed to convey information bits and each antenna within an activated subarray carries an independent modulation symbol. It is found that the proposed SAIM scheme can achieve better performance compared to SMP, SM, and GSM schemes.

Item Type:	Conference Proceedings
Series.:	IEEE Vehicular Technology Conference Proceedings
Publisher:	IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Additional Information:	Copy right for this article belong to IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	17 Apr 2018 19:19
Last Modified:	17 Apr 2018 19:19
URI:	http://eprints.iisc.ac.in/id/eprint/59624

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