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WCDMA Network Deployments: Asynchronous Vs. Synchronous
White Papers A basic design decision facing an operator of a WCDMA network is the nature and level of synchronization between base stations in the network. The WCDMA standard allows asynchronous operation in which each base station uses its own independent...
[July 12, 2007, 3:08]
WCDMA RAN Tuning Report
White Papers This document provides a detailed description of trapped events, blocked call and dropped call classifications in the WCDMA RAN Tuning Report tool in TEMS DeskCat. The formulas used in the report to calculate the event statistics are also presented.
[October 4, 2003, 6:02]
WCDMA Evolved: The First Step - HSDPA
White Papers It describes the basic principles of HSDPA - High Speed Downlink Packet Access as part of the first step of WCDMA Evolved and the added value for operators and their end-users when HSDPA is implemented in a network.
[November 28, 2007, 3:24]
WCDMA Radio Link Engineering Basics: Lessons Learned From 2G IS-95 CDMA And GSM Networks
White Papers Although 3G is still in the early stages of rollout, good overviews of the key aspects of WCDMA networks are becoming increasingly available, which are well suited for engineers, managers, and industry executives looking to gain a higher-level...
[September 18, 2003, 7:28]
HARQ For WCDMA Enhanced Uplink: Link Level Performance In SHO
White Papers This paper deals with the link performance of the Enhanced uplink Dedicated CHannel (E-DCH), a new concept currently studied in 3GPP for introduction in the WCDMA/UTRA-FDD standard. A key feature of E-DCH is the physical/MAC layer retransmission...
[March 2, 2007, 0:00]
Location Technologies For GSM, GPRS And WCDMA Networks - QUALCOMM CDMA Technologies: Enabling The Future Of Communications
White Papers SnapTrack's A-GPS solution supports roaming across different carrier networks of the same technology, between GSM/GPRS and WCDMA (UMTS) networks, among different countries and anywhere there is wireless A-GPS location server support.
[March 28, 2005, 3:00]
A Dual-Band Sigma-Delta Modulator For GSM/WCDMA Receivers
White Papers A dual-band sigma-delta modulator for GSM/WCDMA receivers has been developed. The dual-band modulator employs a 2nd order 1-bit low-distortion sigma-delta modulator for GSM mode and a modified cascaded modulator with single-bit in the first stage...
[November 18, 2005, 0:00]
Business Benefits Of WCDMA Technology
White Papers This white paper focuses on business related benefits that WCDMA is bringing to the mobile environment as the most efficient service enabling technology in the medium to long run that can fill operators' need for cost effective capacity.
[September 29, 2003, 23:34]
PA's Patent Evaluation Skills Help Siemens Strengthen Its Essential IPR Portfolio In WCDMA And WiMAX
White Papers Initially for WCDMA, and subsequently for cdma2000 and WiMAX, PA used its rapid patent evaluation skills to locate potentially Essential patents from large candidate lists provided by Siemens. Siemens has an extensive portfolio of Intellectual...
[March 15, 2006, 23:00]
Direct Conversion Receiver For GSM900, DCS1800, PCS1900, And WCDMA
White Papers A single-chip, multi-mode direct conversion receiver designed for GSM900, DCS1800, PCS1900, and UTRA/FDD WCDMA, applications is described in this paper. The noise figure of the SiGe BiCMOS receiver is less than 4.8dB in all GSM modes, and 3.5dB in...
[November 29, 2005, 0:00]
Basic Concepts Of WCDMA Radio Access Network
White Papers The answer to the capacity demand is the provision of new spectrum and the development of a new technology - Wideband CDMA, or hereinafter referred to as WCDMA. There has been a tremendous growth in wireless communication technology over the past...
[May 11, 2004, 1:03]
A High-Efficiency SiGe BiCMOS WCDMA Power Amplifier With Dynamic Current Biasing For Improved Average Efficiency
White Papers For WCDMA PA's, linearity and efficiency are the most critical design parameters. This paper demonstrates a WCDMA single-stage power amplifier fabricated in a 0.25µm SiGe BiCMOS process. In recent years, Silicon Germanium (SiGe) has become a...
[February 15, 2006, 0:01]
A High Average-Efficiency SiGe HBT Power Amplifier For WCDMA Handset Applications
White Papers A dynamic current biasing technique is developed to improve the average power efficiency for Wide-band Code-Division Multiple-Access (WCDMA) PAs. The linearity of a Silicon-Germanium (SiGe) HBT Power Amplifier (PA) is analyzed with the help of a...
[February 15, 2006, 0:01]
Shared Networks For WCDMA
White Papers In August 2002 the European Commission announced a plan to approve sharing agreements in the UK and Germany between the operators T-Mobile and mmO2. This clearly indicates the willingness of the European Commission, competition authorities and...
[March 28, 2005, 3:00]
Mobility Management And Capacity Analysis For High Speed Downlink Packet Access In WCDMA
White Papers This paper discusses two options for supporting mobility management for HSDPA-users. Especially issues related to direct change of the serving HS-DSCH cell are addressed, where a handover from a HSDSCH in the source cell to a HS-DSCH in the target...
[October 14, 2008, 1:19]
Transition To IPv6 In GPRS And WCDMA Mobile Networks
White Papers The limited size and structure of the Internet address space of IPv4 has caused difficulties in coping with the explosive increase in the number of Internet users. IPv6 is a feasible solution for the problems identified with IPv4.
[October 27, 2004, 3:00]
Digital-IF WCDMA Handset Transmitter IC In 0.25-µm SiGe BiCMOS
White Papers Implemented in a 0.25-µm SiGe BiCMOS process, a highly integrated low-power Transmitter IC (TxIC) is developed for wideband code-division multiple-access handset applications. Based on a digital-IF heterodyne architecture, it eliminates the...
[February 15, 2006, 0:01]
An ADS Bench For Generating Multi-Carrier 3GPP WCDMA ACLR Test Signals
White Papers Multi-carrier Wideband CDMA signals are required for testing 3G wireless base stations. This paper shows how to create a source able to generate those signals, using the Agilent Technologies Advanced Design System 2001 (ADS 2001) environment.
[March 22, 2005, 2:00]
Efficient RTK Positioning By Integrating Virtual Reference Stations With WCDMA Network
White Papers The most advanced and proven implementation of the networked RTK is the VRS network concept. Its requirement of bi-directional communications is a critical disadvantage as this limits the robustness of the system.
[November 1, 2008, 0:22]
Introduction Of High-Speed Data In GSM/GPRS Networks
White Papers The purpose of this white paper is to describe EDGE technology and how it leverages existing GSM systems and complements WCDMA for further growth. The benefits described here are based on Ericsson's vision of one seamless network for GSM and WCDMA.
[September 20, 2003, 0:02]
