Essays about: "radio modulator"

Showing result 11 - 15 of 15 essays containing the words radio modulator.

  1. 11. RF Sampling by Low Pass ΣΔ Converter for Flexible Receiver Front End

    University essay from Institutionen för systemteknik

    Author : Fahad Qazi; [2009]
    Keywords : RF sampling; Sampling Mixer; Downconversion; Sigma Delta modulator; Low pass Sigma Delta ADC; Passive Sigma Delta ADC; Mixer inside the loop;

    Abstract : In today’s world the multi-standard wireless receivers are gaining more and more popularity. End-users want to access voice, data and streaming media from a single wireless terminal. An ideal approach for multi-standard receiver front-end is to digitize a wide band RF signal available from the antenna. READ MORE

  3. 12. RF CMOS power mixer design for short range wireless applications with focus on polar modulation

    University essay from Institutionen för teknik och naturvetenskap; Tekniska högskolan

    Author : Anna-Maria Lann; [2006]
    Keywords : ;

    Abstract : This thesis work is a circuit design of a RF CMOS power mixer that should be used for short range wireless applications, like Bluetooth. The power mixer should also be used for polar modulation technique. READ MORE

  4. 13. DAB Transmission System Simulation

    University essay from Institutionen för systemteknik

    Author : Héctor Uhalte Bilbao; [2004]
    Keywords : Electronics; DAB; Terrestrial digital broadcasting; OFDM; COFDM; IFFT; FFT; SFN; SimulinkTM< sup>; Differential modulator.; Elektronik;

    Abstract : DAB (Digital Audio Broadcasting) is the radio digital system developed as an european standard by the ETSI, EN 300 400, based on the Eureka-147 group works, to improve the performance of the analogue radio systems (AM and FM). The system is based on the OFDM technology which allows DAB to exploit the spectrum frequencies in a better way with a higher quality of sound for mobile receivers specially. READ MORE

  5. 14. Offset-PLL based frequency up-conversion for low spurious transmission

    University essay from Institutionen för systemteknik

    Author : Anders Nilsson; [2003]
    Keywords : Electronics; Offset-PLL; low spurious; up-conversion; radio; transmitter; modulator; Elektronik;

    Abstract : The goal of this final year project is to investigate various techniques to up-convert a baseband signal into radio frequency signals, and to investigate the practical problems encountered in an offset phase locked loop design by implementation. Phase locked loops are commonly used in radio transmitters and receivers to generate accurate RF signals from a low-frequency reference. READ MORE

  6. 15. Investigation of a Closed Loop Modulator for Bluetooth Radios

    University essay from Lunds universitet/Institutionen för reglerteknik

    Author : Henrik Talborn; [2001]
    Keywords : Technology and Engineering;

    Abstract : This rapport investigates the transmitter of the Ericsson Bluetooth radio. The open loop modulation scheme of the existing design is theoretically very simple but difficult to implement with available components. Frequency drift of the carrier is a common result of open loop modulation. READ MORE