Results 81 to 90 of about 15,137 (178)

Low PAPR space frequency block coding for multiuser MIMO SC-FDMA systems: specific issues for users with different spectral allocations

EURASIP Journal on Advances in Signal Processing, 2011
Single-carrier space frequency block coding (SC-SFBC) is an innovative mapping scheme suitable for implementing transmit diversity in single-carrier frequency division multiple access (SC-FDMA) systems.
Ciochina Cristina, Mottier David, Castelain Damien   +2 more
doaj  

Why is CDMA the solution for mobile satellite communication [PDF]

It is demonstrated that spread spectrum Code Division Multiple Access (CDMA) systems provide an economically superior solution to satellite mobile communications by increasing the system maximum capacity with respect to single channel per carrier ...
Gilhousen, Klein S., Jacobs, Irwin M., Padovani, Roberto, Weaver, Lindsay A.   +3 more
core   +1 more source

Phase Noise Suppression Algorithm Based on Modified LLR Metric in SC-FDMA System

Journal of Electrical and Computer Engineering, 2017
In single-carrier frequency-division multiple-access (SC-FDMA) receivers in the long-term evolution uplink, phase noise is one of the major radio-frequency front-end impairments that degrade system performance. To address this issue, we propose a new log-
Zijie Xu, Guangliang Ren
doaj   +1 more source

Uplink Transmit Power Control for Single-Carrier Grouped FDMA with Iterative Multiuser Detection

Applied Sciences, 2019
We consider an uplink power allocation scheme for single-carrier frequency-division multiple access (FDMA) with iterative multiuser detection, called single-carrier grouped FDMA (SC-GFDMA). SC-GFDMA is a non-orthogonal scheme in which several users share
Yong-Sang Cho, Yun-Seong Kang, Moonsik Min   +2 more
doaj   +1 more source

Advanced multiple access concepts in mobile satellite systems [PDF]

Some multiple access strategies for Mobile Satellite Systems (MSS) are discussed. These strategies were investigated in the context of three separate studies conducted for the International Maritime Satellite Organization (INMARSAT) and the European ...
Ananasso, Fulvio
core   +1 more source

Tomlinson Harashima Precoding For Sc-Fdma

, 2009
Publication in the conference proceedings of EUSIPCO, Glasgow, Scotland ...
Noune, MB, Nix, AR
openaire   +1 more source

Improving positioning accuracy by enhanced ToA estimation for a narrow-bandwidth sound-based positioning system using FDMA in protected cropping systems

Smart Agricultural Technology
Robotics technology has advanced significantly, not only in industrial applications but also in agriculture. To meet the growing demand, a novel robotic system employing multiple small ground robots has been proposed for use in greenhouses.
Zichen Huang, Tsay Lok Wai Jacky, Bo Yang   +2 more
doaj   +1 more source

Choice of FDMA/SCPC access technique for aeronautical satellite voice system [PDF]

A worldwide aeronautical mobile satellite system is about to become operational. The system architecture and access methods have been debated extensively, resulting in the selection of Time Division Multiplexing/Time Division Multiple Access (TDM/TDMA ...
Smith, G. K.
core   +1 more source

New techniques of intra-satellite communication and ranging/time synchronization for autonomous formation flyer

Tongxin xuebao, 2008
The technique of intra-satellite communication networking and asynchronous ranging for autonomous forma-tion flyer（AFF） were researched. The hybird FDMA/CDMA mode was developed for AFF communication networking,and precisely ranging ＆ time synchronization
LI Xue, ZHANG Qi-shan, XU Yong, WANG Ce
doaj   +2 more sources

A generalized transmultiplexer and its application to mobile satellite communications [PDF]

A generalization of digital transmultiplexer technology is presented. The proposed method can realize transmultiplexer (TMUX) and transdemultiplexer (TDUX) filter banks whose element filters have bandwidths greater than the channel spacing frequency ...
Ichiyoshi, Osamu
core   +1 more source