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The Hidden Challenge of MIMO Test

October 15, 2009 11:08 am | Comments

Today, engineers can combine modern RF signal analyzers with a basic understanding of digital downconversion to produce a tightly synchronized MIMO measurement solution. By David A. Hall, National Instruments click to enlarge Figure 1.

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Build Agility through Wireless Networks Designed Right

October 15, 2009 9:33 am | Comments

Designing a wireless data network without fully accounting for the mix of applications, the types of client devices and number of users risks reduced performance. By Dr. Roger Skidmore, Motorola click to enlarge Figure 1.

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Protecting Chinese 3G Base Stations

October 15, 2009 9:02 am | Comments

Judicious use of the appropriate protective circuits and devices in cellular base stations can greatly improve reliability and ensure required compliance with YD5098-2005. By Teddy To, China, Littelfuse Inc. click to enlarge Figure 1.

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WiMAX 101 The Evolution of WiMAX

October 14, 2009 9:18 am | Comments

With networks built around an infrastructure of base stations and subscriber stations like WiMAX, the size of the infrastructure and the number of deployments is a key consideration. John Schwartz, Digi International It is always interesting whenever a new standard is adopted or starts to gain some ubiquity in the marketplace.

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State-of-the-Art IC: Transmitter in Ultrasound Devices

October 14, 2009 9:18 am | Comments

Lower voltage IC technologies now enable ultrasound receiver chips with unprecedented high gain and low noise numbers. By Ismail Oguzman and Arash Loloee, Texas Instruments click to enlarge Figure 1. Typical block-diagram of a complete medical ultrasound system.

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Pay Per Click: What's This All About?

October 14, 2009 9:17 am | Comments

Nancy Maas Editor-in-Chief A recent article on the Associated Press site indicated that several of the world's most prominent technology companies are offering suggestions to newspaper publishers on how they can charge readers for news online.

Bringing the Real World into the Lab for 4G Wireless Testing

October 2, 2009 8:51 am | Comments

Failure to test base-station or mobile device receivers under realistic conditions can add significant risk in terms of support costs, churn, and operational costs. By Arashk “Ash” Mahjoubi-Amine, Spirent Communications click to enlarge Figure 1.

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Challenges of LTE Basestation and Handset Testing

August 13, 2009 7:18 am | Comments

With the pressure on infrastructure equipment vendors to deliver quickly to market, structured, incremental and flexible test programs are essential for the development integration, verification and optimization of LTE infrastructure. By Phil Medd and Nick Carter of Aeroflex Test Solutions click to enlarge Figure 1.

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Has Moore's Law Outlived its Usefulness?

August 12, 2009 1:02 pm | Comments

Nancy Maas Editor-in-Chief There is an interesting topic being debated on various industry blogs right now. One that is very polarizing and may impact the semiconductor industry far beyond what we have seen thus far. The critical question seems to be: How long will Moore's Law be reliable? Moore's Law, named after Intel Corporation co-founder Gordon Moore, states that the number of transistors that can be placed on an integrated circuit doubles roughly every two years.

Smart Design Strategies for the Wired and Wireless Network

August 4, 2009 6:52 am | Comments

Planning and designing an integrated wired/wireless network before construction begins pays big dividends later. By Ahmet Tuncay, Trapeze Networks and Paul Kish, Belden. click to enlarge Figure 1. Additional cabling from wiring closet switches to Wi-Fi mounting locations in ceilings should be accounted for in the initial cabling plan, leaving a 15- to 20-foot service loop at the end as wiggle room in case AP locations later require adjusting.

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Dual Channel MIMO Measurements for WiMAX™ Wave 2

June 26, 2009 12:31 pm | Comments

By Benjamin Zarlingo, Agilent Technologies Inc. In designing, troubleshooting and optimizing WiMAX Wave 2 systems, a variety of dual-channel measurements can provide essential insight into their operation and performance. click to enlarge Table 1.

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Study Gives Semiconductor Industry High Grades

June 26, 2009 6:55 am | Comments

Nancy Maas Editor-in-Chief Did you know that the cumulative electricity bill savings enabled by semiconductors might exceed $1.3 trillion through 2030? Semiconductor technologies are so essential to advances in energy efficiency gains that the U.

Radio Channel Emulation Challenges in 3GPP LTE

June 26, 2009 6:55 am | Comments

Securing product performance in the field by using laboratory channel emulation can give a competitive edge to companies that use these solutions. By Janne Kolu, Elektrobit Corporation click to enlarge Figure 1. Emulation of a radio channel in the laborotary conditions.

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Is Network Sharing the OnlyWay Forward for the European Mobile Business?

June 26, 2009 6:55 am | Comments

By Mike Green, European Correspondent Wireless Design & Development The year 2009 is set to be the toughest year to date for European mobile operators. They are facing a fully saturated market, declining voice revenues due to hyper-competition, and a subscriber base that is going to attempt to cut its expenditure on all non-essentials.

Minimising WiMAX/LTE Network Costs with Digital Remote Radio Heads

June 26, 2009 6:55 am | Comments

By Steve Cooper, Axis Network Technology WiMAX has recently come of age with two significant network roll-outs being implemented (one in Moscow and another in Baltimore), and the announcement of the imminent availability of a number of WiMAX-equipped notebook PCs and handheld terminals.

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