Essays about: "radio modulator"

Showing result 6 - 10 of 15 essays containing the words radio modulator.

  1. 6. Diode laser frequency stabilization onto an optical cavity

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Matematisk fysik

    Author : Xingqiu Zhao; [2013]
    Keywords : Single ion detection; Frequency stabilization; Pound-Drever-Hall locking technique; Physics and Astronomy;

    Abstract : During this thesis work, a frequency stabilization system for an External Littrow Cavity Diode Laser (ECDL) at 370 nm has been set up and tested. The goal of the frequency stabilization is to achieve a long term frequency stability of less than ±50 kHz within 8 hours, which will be used for the single Ce ion detection project in the quantum information group. READ MORE

  3. 7. Investigation of the chirp properties of DFB-EAM’s for high speed baseband and RoF transmission links

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

    Author : Miguel Olmedo Iglesias; [2012]
    Keywords : ;

    Abstract : The ever increasing bandwidth demands driven by an explosion in the mobile device market calls for more and more optical and wireless convergence due to the ability of optical communication systems to transport larger amounts of information to longer distances. Optical modulators are in charge of performing the electrical-to-optical domain conversion, which place them as one of the critical components in optical communication systems. READ MORE

  4. 8. Digital Techniques for Compensation of Radio Frequency Impairments in Mobile Communication Terminals

    University essay from Elektroniska komponenter

    Author : Sudarshan Gandla; [2011]
    Keywords : ;

    Abstract : The 3G and 4G systems make use of spectrum efficient modulation techniques which has variable amplitude. The variable amplitude methods usually use carrier‘s amplitude and phase to carry the message signal. READ MORE

  5. 9. An FPGA implementation of a digital FM modulator.

    University essay from Elektroniksystem

    Author : Henrik Boström; [2011]
    Keywords : FPGA; FM; SDR; frequency modulation; software defined radio;

    Abstract : The increase in speed and density of programmable logic devices such as Field Programmable Gate Arrays (FPGA) enables ever more complex designs to be constructed within a short time frame. The flexibility of a programmable device eases the integration of a design with a wide variety of components on a single chip. READ MORE

  6. 10. High Level Ultra Low Power Transmitters for the MICS Standard

    University essay from Elektroniska komponenter

    Author : Per Eidenvall; Nils Gran; [2010]
    Keywords : Ultra Low Power; MICS; PSK; QPSK; Radio Transmitter; QPSK Modulator;

    Abstract : Today, medical implants such as cardiac pacemakers, neurostimulators, hearing aids anddrug delivery systems are increasinglymore important and frequently used in the health caresystem. This type of devices have historically used inductive coupling as communicationmedium. READ MORE