Results 81 to 90 of about 68,492,323 (167)

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, Gaoqi Dou, Jun Gao, Ran Deng   +3 more
doaj   +1 more source

An Enhanced Channel Estimation Scheme in OFDM-IM Systems With Index Pilots for IEEE 802.11p Standard

IEEE Access
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is emerging as a robust technology, especially valued in vehicular communication scenarios for its resilience.
Qing-Shang Dong, Si-Yu Zhang, Behnam Shahrrava, Hui Zheng   +3 more
doaj   +1 more source

TCM, TTCM, BICM and BICM-ID Assisted MMSE Multi-User Detected SDMA-OFDM Using Walsh-Hadamard Spreading

, 2004
Space Division Multiple Access (SDMA) aided Orthogonal Frequency Division Multiplexing (OFDM) systems assisted by efficient Multi-User Detection (MUD) techniques have recently attracted intensive research interests. Forward Error Correction (FEC) schemes
Jiang, M., Ng, S. X., Hanzo, L.
core   +1 more source

Multi-mode selective OFDM index modulation transmission scheme

Tongxin xuebao
In order to solve the problem that index information was limited by the number of subcarrier activation patterns and single signal constellation mode in orthogonal frequency division multiplexing with index modulation (OFDM-IM), a multi-mode selective ...
GUO Yi, ZHU Yuchen, WANG Yiqing, LIU Gang, FU Shaozhong   +4 more
doaj  

Modulated Lapped Transform-Based OFDM-IM With Low Complex Deep Neural Network Detector

IEEE Open Journal of the Communications Society
This article presents a novel modulated lapped transform-based orthogonal frequency division multiplexing with index modulation (MLT-OFDM-IM) scheme combined with a low-complexity deep neural network (DNN) detector.
Ahmed Waheed, Smaya Moher
doaj   +1 more source

The Impact of OFDM-IM System Parameters on the Performance of the SLM PAPR Reduction Technique

NTU Journal of Engineering and Technology
Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) is an effective communication technology that utilizes subcarrier indices to transmit information in addition to the information traditionally modulated on active subcarriers ...
Zainab Mohammed Abdulkareem, Mahdi Fadil Khaleel, Mahmoud Shakir Wahhab   +2 more
doaj   +1 more source

On The Non-linear Distortion Effects in an OFDM-RoF Link

, 2006
Radio over Fiber (RoF) system is a promising technique for microcell and picocell applications for deployment of future ubiquitous wireless data networks.
Song, Ju Bin, Islam, A.H.M.R., Shafik, Rishad Ahmed, Rahman, Mohammad Shahriar   +3 more
core   +1 more source

Evaluating the physical layer performance of an OFDM candidate for fourth generation networks [PDF]

, 2002
In this paper, work performed under the framework of the IST SATURN project for wide area cellular OFDM is presented in the context of 4G networks.
Nix, AR, Doufexi, A, Armour, SMD, Beach, MA   +3 more
core  

Iterative Joint Channel Estimation and Multi-User Detection for Multiple-Antenna Aided OFDM Systems

, 2007
Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems have recently attracted substantial research interest. However, compared to Single-Input-Single-Output (SISO) systems, channel estimation in the MIMO scenario
Akhtman, J, Jiang, M, Hanzo, L.
core   +1 more source

Optimization of the Number of Active Subcarriers and M-PAM Modulation Constellation Pattern for OFDM-IM Systems

مهندسی مخابرات جنوب
Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) is a system that exhibits superior power efficiency and bandwidth compared to the conventional OFDM system.
Farshad Jalili kharajoo, SeyyedHadi SeyyedMasoumian Charandabi   +1 more
doaj