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Spectral Efficiency Analysis for Downlink NOMA Aided Spatial Modulation With Finite Alphabet Inputs
- Source :
- IEEE Transactions on Vehicular Technology. 66:10562-10566
- Publication Year :
- 2017
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2017.
-
Abstract
- As the conventional spatial modulation (SM) system lacks an efficient downlink multiple access scheme, this paper proposes a novel downlink nonorthogonal multiple access aided multiple-input multiple-output SM system with finite alphabet inputs. Mutual information (MI) is used to characterize the system's achievable spectral efficiency (SE). Because the MI lacks a closed-form formulation, in this paper we propose a computational-efficient lower bound to provide an approximation to the simulated MI. Besides, preprocessing is also designed at the receiver to mitigate the detrimental effect of channel correlation, which leads to striking a higher SE performance. Simulation results not only confirm the accuracy of our SE analysis, but also substantiate the superior SE performance achieved by the proposed preprocessing.
- Subjects :
- Engineering
Computer Networks and Communications
business.industry
MIMO
Aerospace Engineering
020302 automobile design & engineering
020206 networking & telecommunications
02 engineering and technology
Spectral efficiency
Mutual information
Upper and lower bounds
0203 mechanical engineering
Modulation
Automotive Engineering
Telecommunications link
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
Preprocessor
Radio frequency
Electrical and Electronic Engineering
business
Algorithm
Subjects
Details
- ISSN :
- 19399359 and 00189545
- Volume :
- 66
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Vehicular Technology
- Accession number :
- edsair.doi...........1f36fe0f3481e06fcea5dd763ded81a0