Sökning: "WCDMA"

Visar resultat 1 - 5 av 60 uppsatser innehållade ordet WCDMA.

  1. 1. ADS och Matlab för optimering av pre-distortion av effektförstärkare

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik; Linköpings universitet/Tekniska fakulteten

    Författare :Jessica Trinh; [2015]
    Nyckelord :Predistortion; Digital predistortion; DPD; ADS; ACLR; WCDMA; IMD; Memory effect;

    Sammanfattning : This master’s thesis deals with integrating simulations using Agilents Electronic Design Automation tool ADS with customized Matlab scripts, for solving complex analog and digital radio architectures. In particular, it addresses predistortion, realized in the digital domain, of power amplifiers, modeled in the analog domain. LÄS MER

  3. 2. Comparison and Evaluation of Doppler Spread Estimation Algorithms in WCDMA

    Master-uppsats, KTH/Kommunikationsteori

    Författare :Hui Wen; [2014]
    Nyckelord :;

    Sammanfattning : In a WCDMA transmission systems, the properties of the radio transmissionchannels can be strongly aected by the movement of User Equipment (UE) orthe surrounding objects. The estimation of Doppler spread is therefore of greatimportance since it is closely related to the mobile speed, as it can also be usedto characterize the fast fading in the radio channel. LÄS MER

  4. 3. 4G LTE : eMBMS with MBSFN Service Simulation using OPNET

    Kandidat-uppsats, Mittuniversitetet/Avdelningen för informations- och kommunikationssystem

    Författare :Abdelrahman Walid; [2014]
    Nyckelord :3G; 3GPP; 4G; CoMP; CSI; CSI-IM; CSI-RS; eMBMS; eNB; EPC; EPS; E-UTRAN; GSM; HSPA; IGMP; IGRP; ITU-T; LTE; LTE-A; MAC; MBSC; MBSFN; MCE; MCS; MFN; MME; OFDM; OFDMA; OPNET; OSPF; PDN-GW; PDSCH; PMCH; PUCCH; PUSCH; QoS; SAE; SC-FDMA; S-GW; TDD; TD-SCMDA; UE; UTMS; WCDMA.;

    Sammanfattning : Long Term Evolution (LTE) known in the market as 4G LTE, it is an evolution of the GSM/UMTS standard. The overall aim of LTE was to provide a new radio access technology focusing on packet-switched data only. LTE has provided a new peak download rates, low data transfer latencies, and improved the support for mobility. LÄS MER

  5. 4. Performance and Complexity Comparison of Doppler Spread Estimation for WCDMA Systems

    Master-uppsats, KTH/Kommunikationsteori

    Författare :Ziqi Peng; [2014]
    Nyckelord :Doppler spread estimation; WCDMA uplink systems; Rayleigh fading model; Rician fading model; computational complexity.;

    Sammanfattning : In cellular communication systems, the estimation of Doppler spread has a wide range of applications such as handoff, channel assignment scheme, adaptivetransmission, power control, etc. A great quantity of Doppler spread estimation algorithms have been proposed in the literature. LÄS MER

  7. 5. Scalability Performance of Ericsson Radio Dot System

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Joana Vieira; [2014]
    Nyckelord :;

    Sammanfattning : In the past, network providers resorted to indoor solutions for coverage reasons. However, as traffic volume grows and multiple hotspots appear indoors, capacity provision is also becoming a drive for in-building networks, in particular at the expense of LTE bit rate promises. LÄS MER