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Field-to-Lab Testing Equals Better Real-World Performance for Mobile Devices

May 13, 2011 11:15 am | Articles | Comments

This case study will describe an application of the Azimuth Systems Field-to-Lab (FTL) Solution by a market-leading handset manufacturer. Real-world drive testing is very expensive; lab testing is much less expensive and faster -- provided that the real world can be emulated with sufficient fidelity.

RF/IF Amplifiers and VGAs Cover The Entire Signal Chain

May 12, 2011 6:23 am | Articles | Comments

By Ashraf Elghamrawi, Analog Devices ( www.analog.com ) The amplifier is one of the most versatile building blocks used in RF/IF signal chains today. They are commonly used throughout designs to overcome signal losses incurred from passive mixers, filters, baluns, and other passive elements. Since these losses occur across the entire signal chain five main families of amplifiers have been developed by Analog Devices.

Use Oscilloscopes to Monitor Multiple Protocols

April 11, 2011 12:32 pm | Articles | Comments

By Roland Gamper, LeCroy Corporation Regardless of the system topology and application domain, the development, maintenance and monitoring of electronic system architectures using mixed protocols requires tools able to straddle several busses, at various speeds and with different line characteristics.

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Limitless Wireless: Hybrid Lithium Batteries Can Power Remote Wireless Sensors for over 25 Years

April 11, 2011 11:41 am | Articles | Comments

By Sol Jacobs, Tadiran Batteries Rapidly evolving technology and wireless communications have unlocked the dynamic growth potential of remote wireless sensors, resulting in growing demand for hybrid lithium batteries that combine exceptional long life with the ability to handle high current pulses.

Power Saving Techniques in GSM-GPRS-EDGE Handsets

March 10, 2011 10:01 am | Articles | Comments

By Dr. Oleksandr Gorbachov, CTO, RFaxis, Inc. With over 600 million new mobile phone handsets shipped each year, mobile phones have become an integral part of our daily lives. As more and more new features are being demanded in smaller and thinner handset form factors, excessive current consumption and poor battery life become real issues for the mobile phone user.

RF Envelope Detection Enables Drain Modulation Systems

February 14, 2011 10:14 am | Articles | Comments

By Eamon Nash and Ashraf Elghamrawi, RF Group, Analog Devices, Inc. Improving the Power Added Efficiency (PAE) of High Powered Amplifiers continues to be a challenging goal in a Wireless equipment industry that is struggling to deliver cheaper, smaller equipment that consumes either less electricity or in the case of portable devices, less battery current.

Full Signal Path Solution for Portable Ultrasound Systems

January 10, 2011 12:02 pm | Articles | Comments

By Suresh Ram, National Semiconductor Corporation There is a rising demand for accessible medical care. The world population is rapidly growing and aging, increasing the cost of healthcare. Medical practitioners need small energy efficient and cost effective diagnostic devices. Portable diagnostic equipment that improve quality of healthcare in a cost effective manner are highly desirable.

Meeting the Challenge of Multi-standard Wireless Communications Testing

December 16, 2010 9:05 am | Articles | Comments

By Tim Carey, Aeroflex Test Solutions Non-cellular technologies are increasingly being integrated into cellular terminals, and this has generated the need for test systems that comprise a number of different test platforms, which can make system integration both complex and costly. At the same time, there is pressure to increase test speed and, in combination with the proliferation of functional tests associated with the introduction of new standards, this further increases the costs.

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Generating Multiple Digitally Modulated Carriers Using an AWG

December 15, 2010 11:11 am | Articles | Comments

By Thomas Dippon, Agilent Technologies When testing wideband RF components and systems, it is necessary to stimulate the device under test (DUT) with a wideband signal that is as close to the “real” signal as possible. For some measurements, wideband noise or a multi-tone signal might be appropriate.

The Emerging Smart Multi-Grid™ Wireless Architecture – A Network of Networks

December 14, 2010 9:06 am | Articles | Comments

By Byron Henderson, Mesh Dynamics Smart Grid networks are currently receiving tremendous government attention and funding. The US Department of Energy says the Smart Grid "would integrate advanced functions into the nation's electric grid to enhance reliability, efficiency, and security, and would also contribute to the climate change strategic goal of reducing carbon emissions.

Cars, Clouds, and Pockets: Connecting Vehicle Infotainment Systems to Mobile and Internet Services

December 8, 2010 10:11 am | Articles | Comments

By Kerry Johnson, QNX Software Systems Already, vehicle telematics services have been deployed in tens of millions of automobiles. Nonetheless, mobile services offered on smart phones and other consumer devices are growing at a far greater pace. A quick survey of these mobile services reveals that many offer significant utility to drivers or passengers; in fact, some are designed specifically for in-vehicle use.

Designing a Robust Failure Indicator

December 8, 2010 10:09 am | Articles | Comments

By Chris Keeser, Cypress Semiconductor Corp. The other day I was driving to the local dump to drop off a load of trash carefully stacked into the back of the family minivan. Suddenly I noticed that the “trunk open” light came on. I quickly pulled over just as the rear hatch popped all the way open and the van began to empty my garbage bags all over the road.

How Femtocells Are Playing a Critical Role in the Transition to 4G

November 10, 2010 9:41 am | Articles | Comments

By Joe Cozzarelli, ANADIGICS As mobile carriers and network operators transition to 4G service, they are faced with several challenges, including the massive amount of smartphones available in the market, the volume of data traffic per phone that is rising exponentially, and all the steps required to deploy and upgrade their network infrastructures.

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e-MMC Based Embedded Memory Architectures in Mobile Phones

October 20, 2010 12:55 pm | by Scott Beekman, Toshiba America Electronic Components, Inc. | Articles | Comments

The growth of features available in mobile phones has both driven and been enabled by changes in NAND based memory architectures. As phone capabilities evolved, feature rich phones migrated from NOR-based solutions to NAND-based solutions. Today, with the growth of GB1 (Gigabyte) class phones, a variety of NAND-based architecture solutions are available with various tradeoffs to consider.

Design Considerations Using Lithium Polymer Batteries

August 31, 2010 4:43 pm | Articles | Comments

Dr. Robin Tichy, Micro Power Electronics Li-ion cells come in three basic form factors: cylindrical, prismatic (rectangular brick shape) and the flat Lithium polymer cells. Lithium polymer cells, sometimes called laminate cells, are available in custom footprint size. They can be very thin or quite large depending on their intended use.

Serial RapidIO Gen 2 in Next-Generation Wireless Base Stations

August 30, 2010 12:52 pm | by Stephane Gagnon, IDT | Articles | Comments

Third- and fourth-generation wireless base stations that use today’s most-common interface standards, such as WCDMA, TD-SCDMA, LTE, TD-LTE and Wimax, require a large amount of signal processing to keep up with the uplink and downlink bandwidth requirements.

One Small Step for Bluetooth Low Energy Technology

August 19, 2010 10:45 am | by Jay Tyzzer, Nordic Semiconductor | Articles | Comments

Last December, the Bluetooth Special Interest Group (SIG) announced in a statement that it had adopted Bluetooth low energy wireless technology and that the much anticipated ultra-low power (ULP) form of the popular wireless technology, would be the hallmark feature of the Bluetooth Core Specification Version 4.

SIGINT Systems Adapt for Rapidly Changing Threats

August 8, 2010 5:17 pm | Articles | Comments

By Chris Desalvo, Agilent Technologies Commercially available RF transmitters in the ever-evolving wireless communications technology give SIGINT and COMINT mission managers a most difficult task. They need to detect traditional push-to-talk signals, wideband digital communications, and always be thinking of future threats.

Critical Demands on Ruggedized Wireless Systems for Today and Tomorrow

August 2, 2010 12:57 pm | by Gregory Powers, Tyco Electronics | Articles | Comments

Wireless systems are now fully mainstream in our lives, not only in the consumer world of cell phones, Wi-Fi enabled laptops and satellite television, but also in the mission and life critical world of aerospace and defense. Recent applications such as ADS-B (Automatic Dependant Surveillance - Broadcast) managed commercial airline flight, software defined radios, and UAVs (unmanned aerial vehicles) bristling with sensors, all depend heavily on the electromagnetic spectrum to interact with the world, demand the highest in reliability, and are driving new and innovative solutions relative to electrical interconnect.

Developing Mission Critical Products with Embedded Processors and Software

August 2, 2010 12:44 pm | Articles | Comments

Mukesh Kumar, Texas Instruments The military electronics industry, which includes mission critical products, has always had quality as its ultimate objective. It was a widely held belief that the military’s computers, communications systems and all things electronic had to be a step or two ahead of everyone else’s systems.

The RF Sting in the Digital Transmission Tail

July 8, 2010 12:38 pm | Articles | Comments

Simon Whittle, Nujira Ltd. The new generation of data-oriented digital communications networks being rolled out in the cellular, broadcast, military and other environments carries a sting in the tail for RF designers. In order to achieve high data rates, these new standards use advanced modulation techniques such as OFDM which significantly increase the variations in amplitude of the transmitted signal.

Testing of WiMAX MIMO Devices in a Realistic Manner by Using MIMO Over-the-Air Testing

June 29, 2010 5:03 pm | by Jukka-Pekka Nuutinen, Elektrobit Corporation | Articles | Comments

To overcome the ever increasing end-user performance requirements of mobile devices, new multi antenna devices are being developed utilizing the recent advances in Multiple-Input Multiple-Output (MIMO) techniques, such as transmit diversity and spatial multiplexing introduced e.g. in IEEE802.16 standard.

LTE vs. WiMAX – A Test Perspective

June 29, 2010 4:43 pm | Articles | Comments

By Graham Celine, Azimuth Systems The marketing battle between WiMAX and LTE is raging in an effort to declare which is the best solution, and vendors and service providers are racing to put stakes in the ground to claim the first or most predominant network delivering wireline speeds. However, the true challenge still lurks in the background and has yet to raise its head: which technology will work better, which will provide more throughput, which will offer better range and which will deliver more flexible mobility? The ability to put each of these technologies through their paces and comprehensively test and benchmark the performance of the network is pivotal to the success of either technology’s rollout.

Highest Efficiency Solar Panels to Date Feature New BOOST™ Cell Technology

June 17, 2010 11:47 am | Articles | Comments

Evergreen Solar, Inc., a manufacturer of String Ribbon™ solar panels with its proprietary silicon wafer technology, recently unveiled its upcoming line of higher efficiency solar panels featuring its newly developed BOOST™ Cell Technology, at Intersolar 2010 in Munich, Germany.   The new ES-D and ES-E series of panels for residential and commercial markets feature Evergreen’s new Boost cell technology that uses micro wires instead of conventional bus-bars to reduce cell shading, improve current collection and ultimately increase the overall panel efficiency.

Siemens to Provide HVDC Link for German Offshore Wind Farms

June 17, 2010 10:05 am | Articles | Comments

Siemens Energy and Prysmian Powerlink will connect two North Sea offshore wind farms to the German grid using a high voltage direct current (HVDC) link for transpower. The order awarded to the BorWin2 consortium is worth more than €500 millio. The Veja Mate and Global Tech 1 offshore wind farms, which will have a combined power generating capacity of 800 MW, will be connected to the grid via a submarine cable link carrying HVDC.

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