Essays about: "carrier modulation"

Showing result 11 - 15 of 31 essays containing the words carrier modulation.

  1. 11. Circular Modulation Formats and Carrier Phase Estimation for Coherent Optical Systems

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Sebastian Joel Ortega Zafra; [2014]
    Keywords : ;

    Abstract : Digital coherent receivers stand today as a promising technology for the next generation of high-capacity optical systems. Coherent systems enable the use of multilevel modulation formats which increase the spectral efficiency of a system. READ MORE

  3. 12. Performance Evaluation and Comparison of Coherent and Incoherent Receivers under Atmospheric Turbulence

    University essay from Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Author : Mohamed Kazaludeen Akbar; [2014]
    Keywords : Free-Space Optical Communication FSO ; Signal to Noise Ratio SNR ; Avalanche Photodiode APD ; Probability Density Function PDF ; Cumulative Distribution Function CDF ; Bit Error Rate BER ;

    Abstract : Optical free space communication system faces the major challenge because of the atmospheric condition. Signals receive in the ground station using two different types of receivers (Coherent detection and Intensity Modulation and Direct Detection (IM/DD)). READ MORE

  4. 13. Effects of electron beam irradiation on the electrical properties of III-V semiconductor nanowires

    University essay from Lunds universitet/Fysiska institutionen

    Author : Sobhan Sepehri; [2013]
    Keywords : Nanowires; electrical transport; electron beam irradiation; carrier modulation; Physics and Astronomy;

    Abstract : Scanning electron microscopy is widely used in nanowire device fabrication. In spite of the attractive high resolution that scanning electron microscopy provides, it influences the electrical properties of III-V nanowires. READ MORE

  5. 14. Extraction of radio frequency quality metric from digital video broadcast streams by cable using software defined radio

    University essay from Kommunikationssystem; Tekniska högskolan

    Author : Viktor Eriksson; [2013]
    Keywords : QAM; DVB-C; MER; BER; Gardner; Phase locked loop; Mueller Muller; RRC-filter; Carrier recovery; Timing Recovery; Matched filtering;

    Abstract : The purpose of this master thesis was to investigate how effiecient the extractionof radiofrequency quality metrics from digital video broadcast (DVB) streamscan become using software defined radio. Software defined radio (SDR) is a fairlynew technology that offers you the possibility of very flexible receivers and transmitters where it is possible to upgrade the modulation and demodulation overtime. READ MORE

  6. 15. Load Balancing in Microwave Networks

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Adeel Mohammad Malik; Muhammad Sheharyar Saeed; [2013]
    Keywords : ;

    Abstract : Microwave links are very commonly used in carrier networks especially towards the access side. They not only ease deployment of a network but are also very cost effective. However, they bring along a multitude of challenges which are characteristic of the wireless technology. Microwave links are fickle. READ MORE