Results 161 to 170 of about 62,657 (220)

P-OFDM: Spectrally Efficient Unipolar OFDM

Optical Fiber Communication Conference, 2014
A novel OFDM signal format, polar-OFDM (P-OFDM), is proposed. P-OFDM offers twice as much spectral efficiency as state-of-the-art real-value unipolar OFDM formats. Inherently, the high PAPR is reduced and the numerical evaluation of the BER performance under dynamic-range constraint of optical sources demonstrates superior results.
Hany Elgala, Thomas D. C. Little
openaire   +2 more sources

Comparison of DCO-OFDM, ADO-OFDM, HDC-OFDM and HNC-OFDM for Optical Wireless Communications

Journal of Optical Communications, 2018
Abstract This paper presents a new form of orthogonal frequency division multiplexing (OFDM) termed as hybrid noise cancelled asymmetrically clipped optical OFDM (HNC-OFDM) for optical wireless communication. This HNC-OFDM is formed by combining the concepts of noise cancelled asymmetrically clipped optical OFDM and DC biased optical ...
openaire   +1 more source

A OFDM module for a MB-OFDM receiver

2007 International Conference on Design & Technology of Integrated Systems in Nanoscale Era, 2007
The rules defined by FFC, for marketing and operation of UWB products, permitted the use of orthogonal frequency division multiplexing (OFDM) to implement UWB communications. MB-OFDM is taking place as good approach to UWB, for instance for wireless USB.
Nuno Rodrigues, Horacio Neto, Helena Sarmento   +2 more
openaire   +1 more source

On the comparison between conventional ofdm and mse-ofdm systems

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
A new multi-symbol encapsulated orthogonal frequency division multiplexing (MSE-OFDM) system is proposed, in which one cyclic prefix (CP) is used for a frame of multiple OFDM symbols. A system level comparison between a conventional OFDM and the proposed MSE-OFDM system is presented in this study.
Xianbin Wang 0001, Yiyan Wu 0001, Jean-Yves Chouinard   +2 more
openaire   +2 more sources

Technology Independent Security Aware OFDM (SA-OFDM)

2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2019
Orthogonal frequency division multiplexing (OFDM) is currently the most prominent modulation technique, mainly due to it’s spectral efficiency. To improve the security performance of OFDM based systems, multiple security approaches are proposed in literature, including physical-layer (PHY) approaches.
Monette H. Khadr, Hany Elgala, Moussa Ayyash, Thomas D. C. Little, Michael B. Rahaim, Abdallah Khreishah   +5 more
openaire   +1 more source

A Postfix Synchronization Method for OFDM and MIMO-OFDM Systems

2008 IEEE Wireless Communications and Networking Conference, 2008
This paper proposes a synchronization method that uses as preamble two identical training parts (Chu sequences) followed by a flipped postfix (FlP) for OFDM and MIMO-OFDM systems. The proposed method provides symbol timing and carrier frequency offset (CFO) estimators.
Yaobin Wen, Florence Danilo-Lemoine
openaire   +2 more sources

Frequency offset estimation for OFDM, PCC-OFDM and overlap PCC-OFDM

2001
Thesis (Ph.D.) -- La Trobe University, 2001.; Submitted to the Department of Electronic Engineering, Faculty of Science, Technology and Engineering.
openaire   +1 more source

Precoded OFDM for asynchronous uplink with transparency to OFDM receiver

2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2017
A novel waveform design approach is taken to develop a waveform based on precoding of data symbols, referred to as Precoded OFDM. The waveform is tailored for robustness against asynchronous transmission and a simple OFDM receiver to keep its intricacies hidden from the system.
Saeed Afrasiabi Gorgani, Gerhard Wunder, Wooram Shin   +2 more
openaire   +1 more source

Performance of Turbo coded wireless link for SISO-OFDM, SIMO-OFDM, MISO-OFDM and MIMO-OFDM system

14th International Conference on Computer and Information Technology (ICCIT 2011), 2011
In this paper, performance of a Turbo coded OFDM wireless link is evaluated in the presence of Rayleigh fading for SISO, SIMO, MISO and MIMO system. Data are encoded using turbo encoder then modulated by QPSK or 16 QAM or 64 QAM and further encoded using STBC, and the encoded data are split into n streams which are modulated by OFDM and simultaneously ...
openaire   +1 more source

Generalized OFDM

2017 International Conference on Information and Communication Technology Convergence (ICTC), 2017
Myungsup Kim, Do Young Kwak
openaire   +1 more source