Bob Nelson is Agilent Technologies’ MXA (N9020A) Product Support Engineer. He has spent the last 14 years with the company, supporting the Agilent field organization and customers with application-focused measurement requirements. Nelson holds a degree in Electrical and Electronic Engineering from California State University, Chico.
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Since 2008, Paolo Volpato has served as Product Strategy Manager at Alcatel-Lucent. His function deals with the evolution strategy and positioning of the company's microwave product portfolio. His interests include networking and mobile backhauling, specifically in the Long-Term-Evolution (LTE) domain.
David A. Hall
David Hall is a Senior Product Marketing Manager for RF and Communications at National Instruments. His activities include building product demos, providing user feedback, and writing application notes, with particular subjects of expertise include digital signal processing and digital communications systems.
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Tom Callahan is the General Manager and CTO of QRC Technologies, a provider of network-discovery cellular test and measurement tools for military and government use. Prior to establishing QRC Technologies, Callahan was Vice President of Engineering for PCTEL’s RF Solutions group, which focused on building cellular scanning receivers. He previously worked as a DSP Engineer building signal-intercept systems for Watkins–Johnson. Callahan has a BSEE and MBA. He is an expert in the air interfaces for cellular protocols and has worked in numerous roles including as a DSP, software, and systems engineer. Callahan also is a Certified Program Management Professional (PMP).
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Kang Chen is a Senior Applications Specialist at Spirent Communications. Prior to joining the company in 2007, Kang held senior engineering positions at Agilent and Alcatel. He earned a BEng from Chongqing University of Posts and Telecom, and an MSEE from Rutgers University, where he researched MIMO and cooperative communications.
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Gary Simpson has been with Maury Microwave since 1982, currently serving as chief technical officer. Gary is a pioneer in device characterization systems; in 1987 he developed one of the earliest automated slide-screw tuners for advanced load pull measurements. Since then, he has been responsible for much of the ongoing development of device characterization techniques, methodologies, and systems.
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Although various types of time gating exist, some applications are more appropriate for certain time-gating methods. Beyond making this determination, designers should know the latest techniques for gate triggering and measuring wide-bandwidth...
As the cellular industry transitions from providing basic voice service and text messages to supporting high-data-rate digital services, the migration toward newer cellular protocols continues to accelerate.
Even though such results are often provided automatically, designers will have better understanding and potential for optimization if they understand how the root mean square (RMS) phase deviation is calculated from the ratio of power of the...
Today, several instrument vendors are offering high-performance PXI RF test equipment. In a world that was once dominated by traditional-rack-and-stack instruments, this industry shift begs the question: “Why?” More specifically, we...
Many see drive testing–the process of testing cellular systems and equipment by literally driving around with live mobile devices in a car or van—as the ultimate test of a cell phone or base station. However, drive testing incurs significant c...