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Channel estimation for OFDM-IM systems
TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES, 2019 Orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been recently proposed to increase the spectral efficiency and improve the error performance of multicarrier communication systems. However, all the OFDM-IM systems assume that the perfect channel state information is available at the receiver.
Yusuf Acar +2 more
openaire +4 more sources
Enhanced Coordinate Interleaved OFDM With Index Modulation
IEEE Access, 2017 Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) has attracted much attention in recent years. In OFDM-IM, the information bits of a block are generally divided into several subblocks, each of which is further split into two ...
Yun Liu +5 more
doaj +1 more source
Homodyne OFDM using simple optical carrier recovery [PDF]
, 2014 We demonstrate a novel optical injection locking approach to carrier recovery in RF-pilot aided OFDM. Any need for optical pre-filtering is eliminated and only very narrow guard bands are required.
Wu, D.S. +7 more
core +1 more source
Practical Implementation of Index Modulation-Based Waveforms
IEEE Access, 2017 Orthogonal frequency division multiplexing (OFDM) with index modulation (OFDM-IM) technique has been recently proposed to provide performance improvements over conventional OFDM.
Selahattin Gokceli +3 more
doaj +1 more source
An Efficient Application of Turbo Coding for OFDM In-Phase/Quadrature Index Modulation
IEEE Access, 2023 We present a method to efficiently apply turbo coding to OFDM in-phase/quadrature index modulation (OFDM-IQ-IM) for both cases of presence and absence of puncturing.
Eunchul Yoon, Soonbum Kwon, Sun Yong Kim
doaj +1 more source
A Novel Rotated Constellation-Based LLR Detector for Flexible NOMA Based OFDM-IM Scheme [PDF]
IEEE Wireless Communications and Networking Conference, 2023 OFDM-IM NOMA is a newly created flexible scheme for future generation communication systems. For the downlink OFDM-IM NOMA system, a low-complexity “rotated constellation based log likelihood ratio (LLR) detector” has been proposed in this work.
Subham Sabud, Preetam Kumar
semanticscholar +1 more source
Vector OFDM With Index Modulation
IEEE Access, 2017 The concept of index modulation (IM) has gained increased attention in recent years. As a member of the IM family, orthogonal frequency division multiplexing with index modulation (OFDM-IM), which is able to convey additional information bits using the ...
Yun Liu +4 more
doaj +1 more source
Applied Sciences, 2020 The purpose of this article is to propose a new configuration based on OCDMA and Fast-OFDM techniques for access network applications. A hybrid intensity modulation with direct detection, fast orthogonal frequency-division multiplexing–code division ...
Hichem Mrabet
doaj +1 more source
Iterative Receiver Architectures for MIMO-OFDM [PDF]
, 2007 In this paper we propose a turbo-detected multiantenna-multi-carrier receiver scheme. Following the philosophy of the turbo processing, our turbo MIMO-OFDM receiver comprises a succession of detection modules, namely the channel estimator, the space-time
Jos Akhtman +3 more
core +1 more source
Optimal Mapper for OFDM With Index Modulation: A Spectro-Computational Analysis
IEEE Access, 2020 In this work, we present an optimal mapper for OFDM with index modulation (OFDM-IM). By optimal we mean the mapper achieves the lowest possible asymptotic computational complexity (CC) when the spectral efficiency (SE) gain over OFDM maximizes.
Saulo Queiroz +2 more
doaj +1 more source