Creating perfect simulation for wireless receiver test
Nov 1, 2007
By David A. Hall This article explains the importance of receiver simulation and validation by illustrating how wireless impairments can affect a communications channel. It also describes how RF record and playback systems can be used as tools to validate receiver design....
Direct synthesis of WiMedia UWB signals
Sep 1, 2007
By Iqbal Bawa, K. A. Muralidharan and Joan Mercade Although UWB promises high data rates, creating these signals in the lab and preserving their signal integrity is a highly complex process. One unique method of creating UWB-WiMedia signals uses an arbitrary waveform generator (AWG), yet retains the simplicity of using a dedicated UWB chipset. RF design engineers who use this unique method of AWG-based WiMedia signal generation will have several options, including IQ-baseband, IF and direct-RF-synthesis signal-generation techniques....
Designing energy-smart 3G base stations
Aug 1, 2007
By Tim Haynes Mobile consumers are now demanding bandwidths comparable to those that can be achieved in a fixed location. 3G networks based on W-CDMA, and other new...
Will 3G LTE give mobile devices a new edge?
May 1, 2007
Ashok Bindra, Editorial Director With competitive pressure building from mobile WiMAX and ultramobile broadband, supporters at the Third Generation Partnership Project are looking beyond the current 3G wireless technologies, such as wideband CDMA, which were developed for a mixture of voice and data communications over the same wireless network. ...
Tackling complex signal-processing tasks for 3G LTE
May 1, 2007
By Ashok Bindra While semiconductor
suppliers are readying their DSPs and FPGAs, as well as front-end data
converters and RF power amplifiers, test gear providers are unveiling their
test strategies. ...
Mobile applications continue to spur advances in TV tuners
Apr 1, 2007
Ashok Bindra, Editorial Director As digital technology permeates the mobile TV space, designers are combining advances in CMOS and silicon germanium BiCMOS processes with digital architectures and proprietary algorithms to deliver tuners that support multiple bands of frequencies and handle numerous standards with ultralow power consumption....
Using MCPAs as active combiners for optimizing the 3G transition
Apr 1, 2007
By Christopher Zappala and Jeffrey Strahler Wireless operators have used multicarrier power amplifiers to increase the coverage and capacity of existing base stations. Most often, the MCPAs have operated in TDMA and CDMA environments, and not in GSM systems, until recently. With active combining emerging as the MCPA's primary application, 3G networks are becoming the target for deployment. In addition to describing what is active combining, this article shows how MCPAs can help transition to 3G networks....
Adopting multi-antenna signal processing in wireless networks
Mar 1, 2007
By Steven Glapa Wireless operators are increasing their focus on data and multimedia services to drive revenue growth. This is creating demands for substantially improved radio equipment performance....
Meeting mobile WiMAX performance requirements
Feb 1, 2007
By David Patterson and Lars Johnsson This article discusses a new-generation chipset that is designed to meet the performance demands a mobile WiMAX handsets and laptops....
ADAPTIX participates in mobile WiMAX interoperability testing
Nov 1, 2006
ADAPTIX has tested the delivery of IP-based multimedia content over its new BX-3000 base station and SX-300 mobile terminal as part of the latest WiMAX Forum Plugfest dedicated to Mobile WiMAX. The Plugfest, held in Frederick, MD, brought together ADAPTIX and 20 other companies to test the interoperability of products based on Mobile WiMAX....
Understanding ATE production test
Nov 1, 2006
By Kyle Klatka With careful test strategy consideration, semiconductor companies can achieve product quality and cost aspirations for the UWB market....
State of the UWB industry
Nov 1, 2006
By Jeff Ravencraft and Stephen R. Wood While the IEEE failed to reach consensus on UWB, efforts of the WiMedia Alliance and others has created a huge wave of momentum to ensure its worldwide adoption....
