High spectral-efficiency 100Gbit/s transmission using DRZ, DQPSK, and PoISK three dimension orthogonal modulation

2012 ◽  
Vol 285 (6) ◽  
pp. 1049-1052 ◽  
Author(s):  
Yufeng Shao ◽  
Nan Chi
Keyword(s):  
Spectral Efficiency ◽  
Three Dimension ◽  
High Spectral Efficiency ◽  
Orthogonal Modulation

Waveforms with High Spectral Efficiency for Terahertz Communications

2021 ◽  
Author(s):  
Mohamed Shehata ◽  
Ke Wang ◽  
Julian Webber ◽  
Masayuki Fujita ◽  
Tadao Nagatsuma ◽  
...  
Keyword(s):  
Spectral Efficiency ◽  
Terahertz Communications ◽  
High Spectral Efficiency

High-Spectral-Efficiency Mode-Multiplexed Transmission Over Graded-Index Multimode Fiber

2018 ◽  
Author(s):  
Roland Ryf ◽  
Nicolas K. Fontaine ◽  
Steffen Wittek ◽  
Karthik Choutagunta ◽  
Mikael Mazur ◽  
...  
Keyword(s):  
Spectral Efficiency ◽  
Multimode Fiber ◽  
Graded Index ◽  
High Spectral Efficiency

scholarly journals Experimental evaluation of a linear angular momentum multiplexed radio link for moving platforms

2021 ◽  
Vol 477 (2254) ◽  
Author(s):  
Ben Allen ◽  
Tim W. C. Brown ◽  
Timothy D. Drysdale
Keyword(s):  
Angular Momentum ◽  
Spectral Efficiency ◽  
Experimental System ◽  
Antenna System ◽  
Radio Link ◽  
Translation Invariance ◽  
Video Streams ◽  
Moving Platforms ◽  
High Spectral Efficiency ◽  
Performance Results

Linear angular momentum multiplexing (LAMM) has recently been proposed for high spectral-efficiency communications between moving platforms, such as between trains and ground infrastructure. We present performance results obtained from a scale experimental system comprising a 2 × 2 antenna system operating at 2.35 GHz. The link transmitted two independent video streams, using RF pre-coding and software-defined radios to modulate and up/down-convert the signals. Linear motion is introduced to demonstrate the translation-invariance of the technique. We interpret the measured data with the aid of an analytical model to show that crosstalk between the two channels is at levels low enough to consistently support the video streams without interruption. Specifically, our results show spectral efficiency is consistently higher when LAMM coding is enabled compared with an uncoded channel.

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