Results 91 to 100 of about 79,941 (235)

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

Orthogonal frequency division multiplexing (OFDM) in photonic communications

, 2010
OFDM has emerged as a promising modulation technique in long-haul and access optical networks because of a number of advantages: Scalable spectrum partitioning, good spectral efficiency, dispersion tolerance, and a natural suitability for software-defined transmission.
Freude, W., Hillerkuss, D., Schellinger, T., Schmogrow, R., Winter, M., Vallaitis, T., Bonk, R., Marculescu, A., Li, J., Dreschmann, M., Meyer, J., Ben Ezra, S., Narkiss, N., Nebendahl, B., Parmigiani, F., Petropoulos, P., Resan, B., Weingarten, K., Ellermeyer, T., Lutz, J., Möller, M.   +20 more
openaire   +1 more source

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

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

Downlink Precoding for Massive MIMO Systems Exploiting Virtual Channel Model Sparsity

, 2017
In this paper, the problem of designing a forward link linear precoder for Massive Multiple-Input Multiple-Output (MIMO) systems in conjunction with Quadrature Amplitude Modulation (QAM) is addressed.
Ayanoglu, Ender, Ketseoglou, Thomas
core   +1 more source

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

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

PERANCANGAN DAN IMPLEMENTASI SISTEM ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) DENGAN MENGGUNAKAN DSK-TMS320C6713

Jurnal Elektro dan Telekomunikasi Terapan, 2016
OFDM adalah salah satu teknik transmisi yang menggunakan beberapa buah frequency subcarrier yang saling tegak lurus (orthogonal). Karakteristik yang saling tegak lurus membuat frequency subcarrier dapat saling overlap tanpa menimbulkan interferensi.
Yusup Mulyadi, Arsyad Ramadhan Darlis, Dwi Aryanta   +2 more
openaire   +2 more sources

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