Results 191 to 200 of about 79,941 (235)

Developments in orthogonal frequency division multiplexing (OFDM) system-a survey

2011 Second Asian Himalayas International Conference on Internet (AH-ICI), 2011
In today's communication scenario, high data rate single-carrier transmission may not be feasible due to too much complexity of the equalizer in the receiver. To overcome the frequency selectivity of the wideband channel experienced by single-carrier transmission, multiple carriers can be used for high rate data transmission.
M N Suma, B. Kanmani
openaire   +1 more source

Orthogonal Frequency Division Multiplexing: The Way Forward for 6G Physical Layer Design?

IEEE Vehicular Technology Magazine
Sixth generation promises to have a variety of applications, as well as network entities, in terms of power, range, data rates, latency, and propagation environment.
Muhammad Sohaib J. Solaija, Salah Eddine Zegrar, Hüseyin Arslan   +2 more
semanticscholar   +1 more source

Hybrid orthogonal frequency division multiplexing (H-OFDM) for visible light communication

11th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM 2015), 2015
In this paper, we present a novel hybrid orthogonal frequency division multiplexing (H-OFDM) for visible light communication (VLC). H-OFDM uses a combination of DC-bias optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) techniques.
null Zhang Jun, null Zhang Jian
openaire   +1 more source

Analysis of the effects of phase-noise in orthogonal frequency division multiplex (OFDM) systems

Proceedings IEEE International Conference on Communications ICC '95, 2002
In OFDM transmission schemes, phase-noise from oscillator instabilities in the receiver is a potentially serious problem, especially when bandwidth efficient, high order signal constellations are employed. The paper analyses the two effects of phase-noise: inter-carrier interference (ICI) and a phase error common to all OFDM sub-carriers.
Robertson, P., Kaiser, S.
openaire   +3 more sources

Orthogonal Frequency Division Multiplex (OFDM)

2004
Almost from the beginning of the electrical transmission of messages about 100 years ago, single-carrier methods have been used for transmitting information. The message to be transmitted is impressed on a sinusoidal carrier by applying analog amplitude, frequency or phase modulation techniques.
openaire   +1 more source

Maximum bandwidth of orthogonal frequency division multiplex (OFDM) over multipath fading channel

2004 International Conference on Communications, Circuits and Systems (IEEE Cat. No.04EX914), 2004
Orthogonal frequency division multiplex (OFDM) is known as an effective method for high-rate transmission over frequency selective fading channels. However, time variations of the channel within an OFDM symbol leads to a loss of orthogonality between subcarriers, resulting in interchannel interference (ICI).
null Zhou Kainan, null Chew Yong Huat
openaire   +1 more source

Scalable network planning for elastic optical orthogonal frequency division multiplexing (OFDM) networks

2012 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012
We propose to achieve scalable O-OFDM network planning with a genetic algorithm (GA) that operates in an adaptive way for high optimization efficiency. When the network topology and lightpath requests are given, the GA encodes the routing, spectrum and modulation assignments (RSMA) as genes and optimizes them iteratively.
null Wei Lu, null Xiang Zhou, null Long Gong, null Zuqing Zhu   +3 more
openaire   +1 more source

A Mixed Orthogonal Frequency Division Multiplexing (X-OFDM) Waveform for Optical Wireless Communication

2020 IEEE Globecom Workshops (GC Wkshps, 2020
Optical wireless communication (OWC), with intensity modulation (IM), requires the modulated radio frequency (RF) signal to be real and non-negative. To satisfy the requirements, this paper proposes a novel mixed orthogonal frequency division multiplexing (X-OFDM) waveform. Hermitian symmetry (HS) of the sub-carriers in frequency domain, guarantees the
Xu Li, Jingjing Huang, Yibo Lyu, Jiajin Luo, Junping Zhang   +4 more
openaire   +1 more source

Implementation and performance evaluation of orthogonal frequency division multiplexing (OFDM) using WARP

2015 International Seminar on Intelligent Technology and Its Applications (ISITIA), 2015
The main problem in high data rate transmision is frequency selective fading due to multipath propagation. This fading causes deep fade on signal spectrum at one particular frequency. To overcome this problem, many researchers proposed a multi-carrier technique, which divides wideband signal bandwidth into multiple narrowband signal before transmitted ...
Titiek Suryani, null Suwadi, null Hasan, Septriandi Wira Yoga   +3 more
openaire   +1 more source

A review on reconfigurable orthogonal frequency division multiplexing (OFDM) system for wireless communication

2016 2nd International Conference on Applied and Theoretical Computing and Communication Technology (iCATccT), 2016
This paper presents the development of reconfigurable OFDM system for wireless communication system from a historical view. A review of research contributions to reconfigurable OFDM systems are summarized. These contributions comprise a development of reconfigurable OFDM system for Software Defined Radio, Implementation of reconfigurable digital ...
null Drakshayini M N, Arun Vikas Singh
openaire   +1 more source