Tom Callahan

Tom
Callahan
General Manager and CTO ,
QRC Technologies

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).

Articles
The Network of Tomorrow Takes Shape
In this follow-on to the article, “Cellular Networks Get Primed for Tomorrow,” the author provides insight into the technical and business issues that will shape near-future networks.
Cellular Networks Get Primed For Tomorrow
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.
Whitepapers

IMD Measurements with IMDView: MS4640B Series Vector Network Analyzer
Sponsored by Anritsu
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How to Select an Analog Signal Generator
Sponsored by Rohde & Schwarz
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Webcasts

Precise Radar Signal Generation for Electronic Warfare Receiver Testing
July 15, 2015 @ 1pm EST
Sponsored by Keysight Technologies
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How to Use a SERDES Channel Simulator for PAM-4 Simulations and Analysis
July 23, 2015 @ 1pm EST
Sponsored by Keysight Technologies
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