Sökning: "GSM teknik"
Visar resultat 21 - 25 av 38 uppsatser innehållade orden GSM teknik.
21. Voice over IP over GPRS
Master-uppsats, KTH/Kommunikationssystem, CoSSammanfattning : The Voice over IP (VoIP) technology has become prevalent today due to its lower cost than traditional telephony and its ability to support new value-added services. Additionally, the increasing availability of wireless internet access has led to research studies examining the combination of wireless network access with voice over IP. LÄS MER
22. Receiver Performance Simulation : System Verification for GSM Receiver
Magister-uppsats, Institutionen för teknik och byggd miljöSammanfattning : The purpose of this thesis is to build and then optimize a simulation environment for the GSM / EDGE / WCDMA receiver in the RF Asics. The system generally consists of two blocks: an Agilent Advanced Design System (ADS) controlled system core and Simulation Environment System for Verification and Design (SEVED). LÄS MER
23. Positionering i GSM-nätverk
Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknikSammanfattning : Merparten av de kommersiella system för mobilkommunikation som finns och byggs i världen idag bygger fortfarande på GSM, antalet abbonnenter är över 2 miljarder. För att utöka funktionaliteten med mobila terminaler har det forskats på att införa positionering i GSM-nätverk. LÄS MER
24. Design of an Ultra Wideband Radio Front-End for Multi-band Communications
Master-uppsats, Institutionen för teknik och naturvetenskap; Tekniska högskolanSammanfattning : Application of multiband systems with a variety of frequency band combinations is accelerating since the communication capacity is increasing and new functions like GPS or Bluetooth are being added. It is expected, therefore, that all the handsets will probably become compatible with multibands in the near future. LÄS MER
25. UWB Measurement Techniques and RF Coexistence in a Mobile Handset
Master-uppsats, Institutionen för teknik och naturvetenskap; Tekniska högskolanSammanfattning : There are two typical interference problems in a multi-radio platform, i.e. blocking due to the saturation of the front end of a receiver by the high power radiation from another transmitter, and desensitization of the receiver by the in-band noise generated by the other transmitter. The UWB device is not an exception. LÄS MER