Abstract
Spatial modulation (SM) is a promising single frequency-radio (RF) large-scale multiple-input multiple-output (MIMO) technique which can strike an attractive tradeoff between spectral efficiency (SE) and energy efficiency (EE) of a wireless network. Recently, a novel technique termed as orthogonal frequency division multiplexing with index modulation (OFDM-IM) emerges, where the SM principle is applied to OFDM subcarriers. It is revealed that OFDM-IM has the potential to outperform classical OFDM in terms of uncoded bit error rate (BER). In this paper, the EE of OFDM-IM with finite-alphabet input is analyzed from an information-theoretic perspective. Based on the analytical expression, the optimal strategy in maximizing the EE of OFDM-IM is proposed, which involves the optimal subcarrier grouping approach as well as the optimal selection of the number of active subcarriers. Monte-Carlo simulations validate the analysis.
| Original language | English (US) |
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| Title of host publication | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 31-35 |
| Number of pages | 5 |
| ISBN (Electronic) | 9781479958320 |
| DOIs | |
| State | Published - Jan 27 2014 |
| Externally published | Yes |
| Event | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 - Macau, China Duration: Nov 19 2014 → Nov 21 2014 |
Publication series
| Name | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 |
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Conference
| Conference | 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 |
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| Country/Territory | China |
| City | Macau |
| Period | 11/19/14 → 11/21/14 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
