Results 81 to 90 of about 35,081 (210)

Unified Model and Survey on Modulation Schemes for Next-Generation Automotive Radar Systems

Remote Sensing
Commercial automotive radar systems for advanced driver assistance systems (ADASs) have relied on frequency-modulated continuous wave (FMCW) waveforms for years due to their low-cost hardware, simple signal processing, and established academic and ...
Moritz Kahlert, Tai Fei, Yuming Wang, Claas Tebruegge, Markus Gardill   +4 more
doaj   +1 more source

OFDM–IDMA for Uplink Transmission in Passive Optical Networks

IEEE Photonics Journal, 2012
In this paper, we propose the orthogonal frequency-division multiplexing-interleaved division multiplexing access (OFDM-IDMA) technique for passive optical networks (PONs).
C. Sanchez, B. Ortega, J. Capmany
doaj   +1 more source

Exact BER Analysis of OFDM Systems Communicating over Frequency-Selective Fading Channels Subjected to Carrier Frequency Offset

, 2007
Orthogonal Frequency Division Multiplexing (OFDM) has been employed in numerous wireless standards. However, the performance of OFDM systems is degraded by both the Carrier Frequency Offset (CFO) and the Phase Estimation Error (PER).
Hanzo, L., Liu, X.
core   +1 more source

Research on modified selected mapping technique for PAPR reduction and reception performance improvement in 8QAM-OFDM optical access systems

Journal of the European Optical Society-Rapid Publications, 2017
Background Orthogonal frequency division multiplexing has been regarded as one of the promising technologies for the optical access systems application.
Yufeng Shao, Wenzhe Ma
doaj   +1 more source

Flexible Multi-Group Single-Carrier Modulation: Optimal Subcarrier Grouping and Rate Maximization

, 2017
Orthogonal frequency division multiplexing (OFDM) and single-carrier frequency domain equalization (SC-FDE) are two commonly adopted modulation schemes for frequency-selective channels. Compared to SC-FDE, OFDM generally achieves higher data rate, but at
Lie, Joni Polili, Yang, Yifei, Zhang, Rui, Zhang, Shuowen   +3 more
core   +1 more source

Securing Communication Channels: An Advanced Steganography Approach With Orthogonal Frequency Division Multiplexing (OFDM)

Journal of Electrical and Computer Engineering
Orthogonal frequency division multiplexing (OFDM) is a widely used modern communications technology due to its resistance to selective frequency fading and efficient use of spectrum. However, the security of OFDM signals remains a source of serious concern, especially in the face of network encryption that aims to disrupt communications or extract ...
Ammar Mohammedali Fadhil, Ali Y. Jaber
openaire   +2 more sources

Terabit optical OFDM superchannel transmission via coherent carriers of a hybrid chip-scale soliton frequency comb

, 2018
We demonstrate seamless channel multiplexing and high bitrate superchannel transmission of coherent optical orthogonal-frequency-division-multiplexing (CO-OFDM) data signals utilizing a dissipative Kerr soliton (DKS) frequency comb generated in an on ...
Cui, Wenwen, Geng, Yong, Huang, Shu-Wei, Huang, Xiatao, Ling, Yun, Qiu, Kun, Wong, Chee Wei, Wu, Baojian, Xu, Bo, Yi, Xingwen, Zhang, Jin, Zhou, Heng   +11 more
core   +1 more source

Spatial transmit diversity techniques for broadband OFDM systems [PDF]

, 2000
— In this paper, we investigate different spatial transmit diversity concepts for orthogonal frequency division multiplexing (OFDM) systems. The idea is to artificially increase the frequency and time selectivity of the resulting channel transfer ...
Stefan Kaiser
core  

Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel

Journal of Electrical, Electronics and Informatics, 2019
Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation.
N. M. A. E. Dewi Wirastuti, I.G.A.K. Diafari Djuni Hartawan, I Made Arsa Suyadnya, Duman Care Khrisne   +3 more
doaj   +1 more source

Multicarrier Multiplexing Method for Very Wide Bandwidth Transmission

EURASIP Journal on Wireless Communications and Networking, 2006
The multicarrier orthogonal code division multiplexing (MC-OCDM) introduced here has been designed for very wide bandwidth (VWB) point-to-point and point-to-multipoint transmission.
doaj