Dual-layered MIMO transmission for
increased bandwidth efficiency
Dual-layered MIMO transmission for
increased bandwidth efficiency
A dual layered downlink transmission scheme is proposed for intrinsically amalgamating multiple-input-multipleoutput spatial multiplexing (SMX) with spatial modulation (SM). The proposed scheme employs a classic SMX transmission which is known to offer a superior bandwidth efficiency compared to SM. We exploit receive antenna based SM (RSM) on top of this transmission as an enhancement of the bandwidth efficiency. The RSM here is applied to the combined spatial and power-level domain, not by activating and de-activating the receive antennas, but rather by choosing between two power levels fP1; P2g for the received symbols in these antennas. In other words the combination of symbols received at a power level P1 carries information in the spatial domain in the same manner as the combination of non-zero elements in the receive symbol vector carries information in the RSM transmission. This allows for the coexistence of RSM with SMX and the results show an increased bandwidth efficiency for the proposed scheme compared to both SMX and SM. To characterize the proposed scheme, we carry out a mathematical analysis of its performance and we use this to optimize the ratio between P1 and P2 for attaining the minimum error rates. Our analytical and simulation results demonstrate significant bandwidth efficiency gains for the proposed scheme compared to conventional SMX and SM.
Masouros, Christos
f7d74183-a31b-412e-8a75-1a942aa156d8
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
22 May 2015
Masouros, Christos
f7d74183-a31b-412e-8a75-1a942aa156d8
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Masouros, Christos and Hanzo, Lajos
(2015)
Dual-layered MIMO transmission for
increased bandwidth efficiency.
IEEE Transactions on Vehicular Technology.
(doi:10.1109/TVT.2015.2438776).
Abstract
A dual layered downlink transmission scheme is proposed for intrinsically amalgamating multiple-input-multipleoutput spatial multiplexing (SMX) with spatial modulation (SM). The proposed scheme employs a classic SMX transmission which is known to offer a superior bandwidth efficiency compared to SM. We exploit receive antenna based SM (RSM) on top of this transmission as an enhancement of the bandwidth efficiency. The RSM here is applied to the combined spatial and power-level domain, not by activating and de-activating the receive antennas, but rather by choosing between two power levels fP1; P2g for the received symbols in these antennas. In other words the combination of symbols received at a power level P1 carries information in the spatial domain in the same manner as the combination of non-zero elements in the receive symbol vector carries information in the RSM transmission. This allows for the coexistence of RSM with SMX and the results show an increased bandwidth efficiency for the proposed scheme compared to both SMX and SM. To characterize the proposed scheme, we carry out a mathematical analysis of its performance and we use this to optimize the ratio between P1 and P2 for attaining the minimum error rates. Our analytical and simulation results demonstrate significant bandwidth efficiency gains for the proposed scheme compared to conventional SMX and SM.
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Published date: 22 May 2015
Identifiers
Local EPrints ID: 381901
URI: http://eprints.soton.ac.uk/id/eprint/381901
ISSN: 0018-9545
PURE UUID: bf4c3672-9746-4f8d-91db-27e5795c2e84
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Date deposited: 14 Oct 2015 14:54
Last modified: 18 Mar 2024 02:35
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Author:
Christos Masouros
Author:
Lajos Hanzo
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