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W-CDMA Vs. CDMA2000
White Papers This white paper compares two methods, W-CDMA (Wideband-CDMA) and cdma2000. Mobile communication is set to be one of the key technologies of the 21st century. Mobile phones have not only gained currency and acceptance worldwide, but did so with a...
[September 20, 2003, 0:08]
On MIMO Signal Processing For Adaptive W-CDMA And OFDM Wireless Transceivers
White Papers The extensions are applied and analyzed on commonly used wideband systems such as W-CDMA and OFDM. Simulation study compares cases with one and two transmit/receive antennas and shows that BER of W-CDMA system consistently improves by exploiting...
[July 21, 2005, 6:00]
Linearity Considerations Of W-CDMA Front-Ends For UMTS
White Papers Formulas are presented relating the various distortion effects of the W-CDMA signals like adjacent channel leakage ratio (ACLR); cross modulation or inter-modulation to well-known linearity measures like input intercept point of third-(IIP3) and...
[July 19, 2005, 6:00]
Performance Analysis Of Space-Time Transmitter Diversity Techniques For W-CDMA Using Long Range Prediction
White Papers Transmitter diversity in the downlink of Code Division Multiple Access (CDMA) systems achieves similar performance gains to the mobile-station receiver diversity without the complexity of a mobile-station receiver antenna array.
[October 6, 2005, 3:00]
Distortion Of W-CDMA Signals Over Optical Fibre Links
White Papers This paper presents first measurement results for the transmission of W-CDMA signals over optical fibre. Radio over fibre systems are now being used extensively for enhanced cellular coverage inside buildings such as office blocks, shopping malls...
[October 18, 2005, 3:00]
Teletraffic Engineering Of Multi-Band W-CDMA Systems
White Papers Multi-band Wide-Band Code Division Multiple Access (W-CDMA) systems are considered to be among the best alternatives for Universal Mobile Telecommunications System (UMTS). To evaluate the performance of multi-band W-CDMA systems many parameters...
[July 25, 2004, 3:16]
Simulation Of A Dual-Mode EDGE /W-CDMA Receiver With Digital IF Down Conversion
White Papers This paper presents a simulation of a dual mode receiver with special emphasis on the digital IF (Intermediate Frequency) for W-CDMA (Wide band Code Division Multiple Access) and EDGE (Enhanced Data Rates for GSM Evolution) formats.
[July 25, 2004, 3:16]
Throughput Analysis For W-CDMA System With MIMO And AMC
White Papers MERL evaluated the average throughput of two types of W-CDMA systems with Multiple-input-multiple-output and adaptive modulation and coding by numerical simulation and theoretic analysis. One system employs space-time transmit diversity, another...
[August 3, 2004, 3:00]
Multipath Statistics For 3G W-CDMA Systems
White Papers This information can be used in the design of the RAKE receiver of wideband code division multiple access systems (W-CDMA). The bands between 1920-1980 MHz and 2110-2170 MHz have been allocated as the uplink and downlink frequency bands of the FDD...
[August 1, 2004, 3:00]
Reliable W-CDMA Network Design
White Papers This paper investigates the W-CDMA network design problem with reliability considerations. A design model that maximizes revenue net the cost of building and maintaining the network infrastructure to provide reliable communication subject to...
[January 12, 2008, 0:01]
A Space-Time Pre-RAKE Transmitter Diversity Method For W-CDMA Using Long Range Prediction
White Papers Transmitter diversity in the downlink for Code Division Multiple Access (CDMA) systems provides a means to achieve similar performance gains as for the mobile-station receiver diversity without the complexity of a mobile-station receiver antenna...
[October 6, 2005, 3:00]
DSCH : Downlink Shared Channel In W-CDMA - A Solution For Bursty Packet Data Traffic
White Papers WCDMA is a 3G standard, aiming at providing high speed wireless data services with different Quality of Service (QoS) guarantees. The standard defines a variety of transport channels to fulfill varying requirements of delay and data rate.
[January 20, 2006, 0:01]
Prototyping A MIMO W-CDMA System Using A System-Level Approach
White Papers This paper describes the development and prototyping of a MIMO (Multiple-Input Multiple Output) wireless link designed to operate under the WCDMA third generation cellular standard. The said development is performed in an integrated, system-level...
[October 6, 2005, 3:00]
RF Transceiver Architectures For W-CDMA Systems Like UMTS: State Of The Art And Future Trends
White Papers The standardization phase for wideband CDMA systems like UMTS is running towards its finalization. As is typical for mobile communication systems standardizing, sufficient RF performance has been assumed and most efforts have been put to baseband...
[July 19, 2005, 6:00]
Successive Interference Cancellation Algorithms For Downlink W-CDMA Communications
White Papers In this paper, successive intracell interference cancellation (IIC) of the wideband-code division multiple access (W-CDMA) signal at the mobile unit is considered. Three new interference cancellation techniques suitable for the downlink of any CDMA...
[July 25, 2004, 3:16]
Improved Digital-IF Transmitter Architecture For Highly Integrated W-CDMA Mobile Terminals
White Papers An improved digital Intermediate Frequency (IF) transmitter architecture for Wide-band Code-Division Multiple-Access (W-CDMA) mobile terminals is proposed. Based on the heterodyne design but without requiring any off-chip IF filter, the transmitter...
[February 15, 2006, 0:01]
Nokia, Ericsson Reach Mobile Milestone
News Nokia and Ericsson said on Tuesday that they've each separately reached milestones for mobile phone equipment that uses wideband-CDMA, the cellphone standard expected to dominate its rivals by 2005. Wideband code division multiple access (w-CDMA...
[September 25, 2002, 10:43]
Broadcom Hits Back At Qualcomm's Latest Suit
News Qualcomm filed suit against Broadcom earlier this week over disputes relating to W-CDMA, the variant of 3G typically used in much of Europe. According to Qualcomm, Broadcom used Qualcomm's trade secrets to compete unfairly in the sales of W-CDMA...
[March 31, 2006, 17:30]
Qualcomm Launches Third Suit Against Broadcom
News The complaint was filed in a federal court in San Diego, and alleges that Broadcom misappropriated trade secrets concerning Qualcomm's "development and marketing of W-CDMA baseband integrated circuit products and the multimedia capabilities of...
[March 29, 2006, 16:45]
The Lessons Of DoCoMo
News However, its early introduction of 3G -- in the form of a version of the W-CDMA standard currently being rolled out around much of the world -- encountered problems, so there is a cautious approach to DoCoMo's next stage, so-called 3.5G technology...
[February 16, 2005, 11:25]
