Results 51 to 60 of about 301,683 (298)
ETRI Journal, 2022 In this study, a novel group-indexed orthogonal frequency division multiplexing index modulation (OFDM-IM) scheme is proposed to achieve a tradeoff between spectral efficiency (SE) and bit-error-rate (BER) performance.
Thomas Wilfred Edison Athisaya Anushya +2 more
doaj +1 more source
Joint Radar-Communication System Design Based on FDA-MIMO via Frequency Index Modulation
IEEE Access, 2023 The index modulation based on multiple-antenna architecture is a prospective information embedding approach for the joint radar-communication system (JRCS).
Mengjiao Li, Wen-Qin Wang
doaj +1 more source
Linear Constellation Precoded OFDM With Interleaved Subcarrier Index Modulation
IEEE Access, 2019 Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) is an emerging and promising multicarrier transmission technique; however, frequency diversity achievement requires further investigation for the OFDM-IM.
Qingbo Wang +3 more
doaj +1 more source
Packet-Level Index Modulation for LoRaWAN
IEEE Access, 2021 The long range wide area network (LoRaWAN) is one of the enabling technologies for low power wide area (LPWA) networks. In LoRaWAN, a node transmits its packet to a gateway (GW) in an autonomous and decentralized manner.
Koichi Adachi +5 more
doaj +1 more source
Generalized Space-and-Frequency Index Modulation [PDF]
IEEE Transactions on Vehicular Technology, 2016 Unlike in conventional modulation where information bits are conveyed only through symbols from modulation alphabets defined in the complex plane (e.g., quadrature amplitude modulation (QAM), phase shift keying (PSK)), in index modulation (IM), additional information bits are conveyed through indices of certain transmit entities that get involved in ...
Datta, Tanumay +2 more
openaire +3 more sources
Generalized Frequency Division Multiplexing With Flexible Index Modulation
IEEE Access, 2017 After the vision and the overall objectives of future wireless networks for 2020 and beyond have been defined, standardization activities for fifth generation (5G) wireless networks have been started.
Ersin Ozturk +2 more
doaj +1 more source
Performance Analysis of Novel Index Modulation-Based Non-Orthogonal Multiple Access Systems over Nakagami-m Fading Channels with Imperfect CSI [PDF]
Radioengineering, 2023 In this paper, a novel index modulation-based non-orthogonal multiple access (IM-NOMA) system is proposed and investigated for both perfect and imperfect channel state information (CSI) uncertainty over Nakagami-m fading channel.
H. M. Shwetha, S. Anuradha
doaj
Tone-Index Multisine Modulation for SWIPT [PDF]
IEEE Signal Processing Letters, 2019 We propose a new simultaneous wireless information and power transfer (SWIPT) technique that embeds information bits in the tone-index of multisine waveforms. By varying the number of subcarriers of the transmitted bandwidth-constrained multisine signal, the proposed scheme enables efficient radio-frequency energy harvesting and low-complexity ...
Krikidis, Ioannis +3 more
openaire +3 more sources
Direct characterization of the spatial effective refractive index profile in Bragg gratings
, 2005 We propose a pulse response method to directly characterize the phase of the spatial index modulation, including the dc refractive index distribution (distributed phase shift), discrete phase, and chirp of fiber Bragg gratings (FBGs).
David J. Richardson +13 more
core +1 more source
Unified Power Allocation for Receive Spatial Modulation Based on Approximate Optimization
IEEE Access, 2018 In this paper, a novel unified power allocation (PA) framework is proposed for receive (pre-coding aided) spatial modulation (RSM). We find that the PA matrix design can be formulated as a non-convex quadratically constrained quadratic program (QCQP ...
Ping Yang +5 more
doaj +1 more source