Journal ArticleDOI
Orthogonal Frequency Division Multiplexing With Index Modulation
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TLDR
It is shown via computer simulations that the proposed OFDM with index modulation scheme achieves significantly better error performance than classical OFDM due to the information bits carried in the spatial domain by the indices of OFDM subcarriers.Abstract:
In this paper, a novel orthogonal frequency division multiplexing (OFDM) scheme, called OFDM with index modulation (OFDM-IM), is proposed for operation over frequency-selective and rapidly time-varying fading channels In this scheme, the information is conveyed not only by M-ary signal constellations as in classical OFDM, but also by the indices of the subcarriers, which are activated according to the incoming bit stream Different low complexity transceiver structures based on maximum likelihood detection or log-likelihood ratio calculation are proposed and a theoretical error performance analysis is provided for the new scheme operating under ideal channel conditions Then, the proposed scheme is adapted to realistic channel conditions such as imperfect channel state information and very high mobility cases by modifying the receiver structure The approximate pairwise error probability of OFDM-IM is derived under channel estimation errors For the mobility case, several interference unaware/aware detection methods are proposed for the new scheme It is shown via computer simulations that the proposed scheme achieves significantly better error performance than classical OFDM due to the information bits carried by the indices of OFDM subcarriers under both ideal and realistic channel conditionsread more
Citations
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Journal ArticleDOI
Coherent Optical OFDM With Index Modulation for Long-Haul Transmission in Optical Communication Systems
TL;DR: In this article , the authors proposed a coherent optical OFDM with index modulation system (CO-OFDM-IM), where the information is conveyed not only through activated subcarriers but also by indices of the active subcarrier that are dynamically updated at the transmitted symbol rates.
Proceedings ArticleDOI
MIMO OFDM Index Modulation with Circular-Shift-Based Activation Pattern for Rapidly Time-Varying Channels
TL;DR: A multiple-input multiple- output (MIMO) OFDM IM scheme with circular-shift-based activation pattern is proposed for the rapidly time- varying (RTV) channel and makes the frequency-domain signal is sparse in both antenna and sub-carrier dimensions.
Dissertation
Improved Spatial Modulation Techniques for Wireless Communications
TL;DR: New transmission techniques to improve the spectral efficiency of SM where antenna/subcarrier index involves in conveying information bits are developed and a multiuser downlink transmission system based on in-phase and quadrature space-shift keying modulation and precoding to reduce the minimum number of transmit antennas while keeping the complexity of the receiver low is investigated.
Journal ArticleDOI
Pulse Index Modulation
TL;DR: The proposed PIM system has better error performance and considerable signal-to-noise ratio (SNR) gain compared to existing spatial modulation (SM), code index modulation aided spread-spectrum (CIM-SS), CIM-SM, and traditional $M$ -ary systems.
Journal ArticleDOI
High-Dimensional OFDM With In-Phase/Quadrature Index Modulation
TL;DR: In this article, the authors proposed a new modulation scheme for wireless communications called high-dimensional orthogonal frequency division multiplexing with in-phase/quadrature index modulation (HD-OFDM-IQ-IM).
References
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Journal Article
Spatial Modulation
TL;DR: An analytical approach for symbol error ratio (SER) analysis of the SM algorithm in independent identically distributed Rayleigh channels results closely match and it is shown that SM achieves better performance in all studied channel conditions, as compared with other techniques.
Proceedings ArticleDOI
A comparison of optimal and sub-optimal MAP decoding algorithms operating in the log domain
TL;DR: A log- MAP algorithm is presented that avoids the approximations in the max-log-MAP algorithm and hence is equivalent to the true MAP, but without its major disadvantages, and it is concluded that the three algorithms increase in complexity in the order of their optimality.
Journal ArticleDOI
Statistical Analysis Based on a Certain Multivariate Complex Gaussian Distribution (An Introduction)
Journal ArticleDOI
Space shift keying modulation for MIMO channels
TL;DR: Space shift keying concepts are extended to incorporate channel coding, where in particular, they are considered a bit interleaved coded modulation (BICM) system using iterative decoding for both convolutional and turbo codes.