front-end for WCDMA and GSM


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A dual-band RF front-end for WCDMA and GSM applications

FREE-DOWNLOAD [PDF] J Ryynanen, K Kivekas, J Jussila Solid-State Circuits,

A Σ-∆ fractional-N frequency synthesizer using a wideband integrated VCO and a fast AFC technique for GSM /GPRS/ WCDMA applications
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A fractional-N frequency synthesizer (FNFS) in 0.5-um SiGe BiCMOS technology is implemented. In order to operate wideband frequency range, a switched capacitor bank LC tank VCO and an Adaptive Frequency Calibration (AFC) technique are used. A 3-bit 4th

Handover between WCDMA and GSM
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Third-generation mobile services are now being introduced throughout the world. Wideband code-division multiple access ( WCDMA ) technology is an excellent framework for providing these services, since it meets the performance demands of the Mobile Internet, including

Advanced WCDMA radio network simulator
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downlink. Additionally, the UTRA WCDMA air interface is more dynamic than the GSM air interface, and therefore, optimised radio resource management algorithms need to be developed to fully exploit the WCDMA capabilities. The

IP Technology in WCDMA / GSM core networks
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The marriage of mobile communication and the Internet has the potential to produce a revolution whose scope far outpaces that associated with the advent of the personal computer (PC). In parallel with the fantastic worldwide growth of mobile subscriptions, the

GSM and WCDMA Common network approach
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The introduction of GPRS established the veracity of data services in mobile environments and pointed the way toward richmultimedia services. However, much of the vision that spawned from GPRS could not be realized until greater bandwidth and higher bit transfer

WCDMA radio network planning
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Capacity and coverage coupled, Fast power control, Planning a soft handover overhead, Cell dominance and isolation, Vulnerability to external interference All the WCDMA cells can use the same frequency> reuse = 1 Interworking between WCDMA and GSM has to

WCDMA Radio Access Network
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Efficient power control in UMTS Increased capacity, increased battery lifetime High data rate transmission WCDMA – GSM handover UMTS/ GSM dualband phone for more coverage New services Live video conversation, Wireless Internet or VPN, Mobile Media

Speech and video quality assessment of GSM and WCDMA rollout mobile radio access networks in a regulated and competitive market
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The rollout of multiple radio access mobile communication networks raises new challenges regarding quality of provided mobile services. Voice and video telephony are the key services that must continuously be under performance assessment and optimization

Integrated RF Front-End for WCDMA and GSM 900
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This paper presents an RF front end that has been designed both with Si BiCMOS and with SiGe BiCMOS. As the front end is in principle similar in both designs, it gives a good platform for the comparison between the different processing technologies. The main design target

Antennas for Mobile Communications: CDMA, GSM , and WCDMA
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The operating frequencies for 2G and 3G mobile communications fall into the 820 960 MHz and the 1710 2170 MHz frequency bands. In these lower microwave frequency ranges, antenna size is an issue for both base station antennas and handset antennas. In general

3G CDMA- WCDMA and cdma2000
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ADBEFC ADBEFC Europe Page 12. 28-June 2001 RZ Ziemer, Colorado Springs, CO 12 Main Differences between WCDMA and GSM Air Interfaces Not supported Supported Downlink diversity Time slot base scheduling with GPRS Load based packet scheduling

A comparative study of UMTS ( WCDMA ) and cdma2000 networks
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PLMN IP Back bone SS7 Page 16. Award Solutions, Inc. Proprietary GSM /GPRS → UMTS MSC and SGSN for Iu Interface Modification WCDMA Air Interface (UE Node B) RAN Interfaces Iub (Node B RNC), Iur (RNC RNC) CN Interface Iu (MSC RNC SGSN RNC) New

Mobile Positioning Methods used in Location-Based Services in GSM , WCDMA and WLAN Networks
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This article describes several user localization methods currently used to support locationbased services (LBS) in GSM and WCDMA mobile networks. Nowadays, many high- technology crimes rely on mobile stations (MS) and existing telecommunication networks

Experiences of the live WCDMA network in Stockholm, Sweden
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The radio network controller supports the A-interface connection to the mobile switching center in a GSM net- work, which enables voice calls to be made between the GSM system and a WCDMA terminal. Roaming to and from GSM has been demonstrated using this system

Using LDMOS Transistor in Class-F Power Amplifier for WCDMA Applications
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Even though the power amplifiers applied in existing second generation GSM (Global System for Mobile Communications) transmitters are greatly efficient, they cannot be used in UMTS/ WCDMA for GSM uses the constant envelope feature of GMSK (Gaussian Minimum Shift

Influence of electrical beamtilt and antenna beamwidths on downlink capacity in WCDMA : simulations and realization
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In this paper we show that beamtilt is an efficient way of improving system capacity also in reuse one systems, such as WCDMA , although there are fundamental differences in the interference situations between GSM and WCDMA

Third design release of Ericssons WCDMA macro radio base stations
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Experience of GSM and the two previous WCDMA RBS design releases has proven the importance of forward and backward compatibility Outdoor cabinets The RBS 3106 outdoor cabinet has the same footprint as the GSM 2106 and WCDMA RBS 3101

IP2 and IP3 nonlinearity specifications for 3G/ WCDMA receivers
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In 3G/ WCDMA mobile handsets, the direct conversion receiver (DCR) architecture is commonly used due to its simplicity and low cost, where interstage filters are completely eliminat- ed. However, with less fil- tering, the linearity requirement for a direct conversion receiver is

GSM /EDGE continued evolution
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Seamless operation or service continuity between GSM /EDGE and WCDMA networks is also being addressed Coverage is improved and higher bit rates can be offered. Service continuity is enhanced within GSM /EDGE and between GSM /EDGE and WCDMA networks

Enhanced ultra-CMOS yields GSM /CDMA switches
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The company has fabricated several single-pole, multithrow switches for quad-band GSM and GSM / WCDMA handset applications, including the model PE42660 single-pole, six-throw (SP6T) switch, and the PE42671 and PE42672 single-pole, seven-throw (SP7T) switches, all




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