Dual-Mode Index Modulation Aided OFDM
TLDR
A dual-mode OFDM technique is proposed, which is combined with index modulation and enhances the attainable throughput of conventional index-modulation-based OFDM and achieves a considerably better BER performance than other OFDM systems using index modulation, while imposing the same or lower computational complexity.Abstract:
Index modulation has become a promising technique in the context of orthogonal frequency division multiplexing (OFDM), whereby the specific activation of the frequency domain subcarriers is used for implicitly conveying extra information, hence improving the achievable throughput at a given bit error ratio (BER) performance. In this paper, a dual-mode OFDM technique (DM-OFDM) is proposed, which is combined with index modulation and enhances the attainable throughput of conventional index-modulation-based OFDM. In particular, the subcarriers are divided into several subblocks, and in each subblock, all the subcarriers are partitioned into two groups, modulated by a pair of distinguishable modem-mode constellations, respectively. Hence, the information bits are conveyed not only by the classic constellation symbols, but also implicitly by the specific activated subcarrier indices, representing the subcarriers’ constellation mode. At the receiver, a maximum likelihood (ML) detector and a reduced-complexity near optimal log-likelihood ratio-based detector are invoked for demodulation. The minimum distance between the different legitimate realizations of the OFDM subblocks is calculated for characterizing the performance of DM-OFDM. Then, the associated theoretical analysis based on the pairwise error probability is carried out for estimating the BER of DM-OFDM. Furthermore, the simulation results confirm that at a given throughput, DM-OFDM achieves a considerably better BER performance than other OFDM systems using index modulation, while imposing the same or lower computational complexity. The results also demonstrate that the performance of the proposed low-complexity detector is indistinguishable from that of the ML detector, provided that the system’s signal to noise ratio is sufficiently high.read more
Citations
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Journal ArticleDOI
Index Modulation Techniques for Next-Generation Wireless Networks
TL;DR: Three forms of IM are investigated: spatial modulation, channel modulation and orthogonal frequency division multiplexing (OFDM) with IM, which consider the transmit antennas of a multiple-input multiple-output system, the radio frequency mirrors mounted at a transmit antenna and the subcarriers of an OFDM system for IM techniques, respectively.
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A Survey on Spatial Modulation in Emerging Wireless Systems: Research Progresses and Applications
Miaowen Wen,Beixiong Zheng,Kyeong Jin Kim,Marco Di Renzo,Theodoros A. Tsiftsis,Kwang-Cheng Chen,Naofal Al-Dhahir +6 more
TL;DR: Spatial modulation (SM) as mentioned in this paper is an innovative and promising digital modulation technology that strikes an appealing tradeoff between spectral efficiency and energy efficiency with a simple design philosophy, and can be applied in other signal domains, such as frequency/time/code/angle domain or even across multiple domains.
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Multiple-Mode Orthogonal Frequency Division Multiplexing With Index Modulation
TL;DR: Monte Carlo simulations on BER corroborate the analyses and show that the proposed schemes appear as promising multi-carrier transmission alternatives by outperforming the existing OFDM-IM counterparts.
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Novel Index Modulation Techniques: A Survey
TL;DR: A survey on IM is presented to provide the readers with a better understanding of its principles, advantages, and potential applications and a range of challenges and open issues on IM are discussed.
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Enhanced Orthogonal Frequency Division Multiplexing With Index Modulation
TL;DR: The proposed OFDM-HIQ-IM and LP-OFDM-IQ-IM schemes, as revealed by both theoretical analyses and computer simulations, enable low-complexity detection and exhibit superior error rate performance over the existing OFDM -IM schemes.
References
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Multiple-Input Multiple-Output OFDM with Index Modulation
TL;DR: The low complexity transceiver structure of the MIMO-OFDM-IM scheme is developed and it is shown via computer simulations that the proposed MIM o-OF DM scheme achieves significantly better error performance than classical MIMo- OFDM for several different system configurations.
Proceedings ArticleDOI
Improved exponential bounds and approximation for the Q-function with application to average error probability computation
Marco Chiani,Davide Dardari +1 more
TL;DR: New exponential bounds for the Gaussian Q-function or, equivalently, of the complementary error function er f c(.) are presented and a quite accurate and simple approximated expression given by the sum of two exponential functions is reported.
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A Tight Upper Bound on Bit Error Rate of Joint OFDM and Multi-Carrier Index Keying
TL;DR: This letter investigates performance enhancement by the concept of multi-carrier index keying in orthogonal frequency division multiplexing (OFDM) systems using a tight closed-form approximation of the bit error rate (BER).
Journal ArticleDOI
Index modulated OFDM for underwater acoustic communications
TL;DR: IM-OFDM for UWA communications is introduced, existing ICI self-cancellation techniques for generic OFDM are reviewed, a new ICI cancellation method is proposed, and a hybrid IM-OF DM scheme with improved spectral efficiency is proposed.
Proceedings ArticleDOI
Index Modulated OFDM with Interleaved Grouping for V2X Communications
TL;DR: A novel revision of IIM-OFDM designed for V2X is proposed, namely Quadrature Index Modulated OFDM with Interleaved grouping (IQIM-OF DM), which performs index modulation independently for the inphase and quadrature components of the constellation symbols.