نتایج جستجو برای: hybrid modulation

تعداد نتایج: 339012  

2014
Petar C. Spalevic Mihajlo C. Stefanovic Stefan R. Panic Branimir S. Jaksic Mile B. Petrovic

In this paper an approach to the performance analysis of hybrid MRCS (Selection Maximal Ratio Combining) diversity system operating over Ricean fading channels is presented. Hybrid MRCS combining method has a simple implementation, where maximal-ratio combined signals are chosen on a selection combining basis. Closed form expressions are provided for standard first and second order statistical ...

2013
Hikmat N. Abdullah Majid A. Alwan Fadhil S. Hasan

Abstract High Peak to Average Power Ratio (PAPR) of transmitted signal is one of the major drawbacks of the complex wavelet packet modulation (CWPM). Utilizing the advantage of concentrating the energy to certain subspaces of the discrete wavelet transform, the performance of three methods to reduce PAPR in CWPM are investigated. These are: threshold method, clipping method and a proposed hybri...

2017
Emanuel P. Haglund Sulakshna Kumari Johan S. Gustavsson Erik Haglund Gunther Roelkens Roel G. Baets Anders Larsson

The hybrid vertical-cavity laser is a potential low current, high-efficiency, and small footprint light source for silicon photonics integration. As part of the development of such light sources we demonstrate hybrid-cavity VCSELs (HC-VCSELs) on silicon where a GaAs-based half-VCSEL is attached to a dielectric distributed Bragg reflector on silicon by adhesive bonding. HC-VCSELs at 850 nm with ...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2010

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