Authored Articles

	Performance WiMAX and Wi-Fi Product Design Demands Effective Channel Emulation April 2008 By Graham Celine Services utilizing next-generation mobile wireless technology (like WiMAX or 802.11n Wi-Fi and, in the future, LTE, UMB, and 802.16m) represent an important next step in the drive to broaden end-user access to high-speed wireless communication, information and advanced data, voice and video services.
	Comprehensive WiMAX and Wi-Fi Product Design Demands Effective Channel Emulation April 2008 By Graham Celine As WiMAX and Wi-Fi become increasingly popular, the stakes increase for vendors servicing the market and the engineers developing new products. Both standards are in the midst of a MIMO technology transition, providing further incentive to find new design and verification tools that can accelerate development of higher performance products.
	Effective Channel Emulation for WiMAX, Wi-Fi Products March 2008 By Graham Celine Next-generation mobile wireless technology represents an important step in the drive to broaden access to high-speed wireless services. In-lab controlled channel emulation is central to accurately characterizing the effect of multi-channel RF interactions on the conformance, performance and interoperability of WiMAX and Wi-Fi systems for both MIMO and SISO (single input single output) implementations.
	Meeting the Testing Challenges of Emerging Wi-Fi Enabled Devices Jan 2, 2008 By Graham Celine The use of Wi-Fi connectivity in non-PC based mobile devices, such as MP3 players, dual-mode cellular and Wi-Fi VoIP phones, video games, printers, smartphones, PDAs and televisions, is rapidly growing. The industry, however, is quickly discovering the complexity involved in incorporating Wi-Fi into a product design, and the difficulties of testing connectivity.
	Functional MIMO Testing For 802.11n August 2007 By Richard Lu and Jose Graziani With the promise of greater throughput and range capabilities, 802.11n will enable new voice, video, and data applications that demand greater performance. Proper test and measurement of device and network capabilities are critical to ensure the success of this growing market.
	Effectively Testing MIMO-Enabled Wireless Devices Aug 1, 2007 By Graham Celine Multiple input, multiple output (MIMO) technology, the foundation for the next generation of Wi-Fi products, leverages multiple transmit and receive antennas to deliver greater wireless throughput and range, enabling ubiquitous high-speed voice, video and data services. Today, three basic methods can be used to test MIMO-enabled devices.
	Certification Testing of Wi-Fi Mobile Devices June 2007 By Graham Celine of Azimuth Systems and Justin Helmig and Mark Ranta of TapRoot Systems The integration of Wi-Fi technology in mobile devices such as smartphones, PDAs, and a host of other platforms is continually growing. For companies, test labs, and industry groups like the Wi-Fi Alliance that are testing the interoperability of these new products, this becomes a challenge of scope that clearly needs to be addressed.
	Critical WiMAX Product Design and Testing Demands Effective Channel Emulation March 1, 2007 By John Griesing Multiple-input multiple-output (MIMO) technology is the foundation of the next generation of mobile WiMAX products. In lab-controlled channel emulation, using a channel emulator is required to accurately characterize the effect of multichannel RF interactions on the conformance, performance and interoperability of MIMO and single-input single-output (SISO) WiMAX systems.
	Meeting the Testing Challenges of Wi-Fi-enabled Devices January 1, 2007 By Charles Wright and Jeff Abramowitz Familiarity with the guidelines and methodology of the standardized approach used by the Wi-Fi Alliance test engine for the certification of Wi-Fi-enabled application-specific devices (ASDs) can streamline the certification process and facilitate the performance testing of these wireless designs.
	802.11T: Standardizing Wi-Fi Test Metrics October 2006 By Jeff Abramowitz The testing of Wi-Fi is much more challenging than testing traditional Ethernet networks. Testing in accordance with 802.11T will help ensure that 802.11 products meet the challenges and demands of enterprise networks.
	Channel Emulation for Improved MIMO Product Design September 2006 By Jeff Abramowitz and Graham Celine MIMO technology will be the foundation for the next generation of Wi-Fi products. Effective testing methodologies are becoming increasingly important for Wi-Fi chipset vendors and system manufacturers.....
	Pre-Deployment Testing of Wireless Mesh Networks August 2006 By Graham Celine A new and resilient Internet infrastructure presents a set of unique testing challenges.
	Ensuring Next-Generation Performance from 802.11n Products July 20, 2006 By Jeff Abramowitz The IEEE 802.11n standard will specify next-generation Wi-Fi products with performance that greatly exceeds current solutions. To truly deliver the performance offered by 802.11n, vendors must be particularly diligent in testing their products.
	Using Correlated Test Results to Improve Wi-Fi Product Design, Part I May 2006 By Jeff Abramowitz The evolution of WLANS has resulted in a steady stream of new technologies and products. Wireless system designers are well aware that the complex wireless environment — with its myriad of variables such as RF, interference and multi-path reflections — can impact the success or failure for new products.
	802.11T puts WLANs to the Test March 13, 2006 By Fanny Mlinarsky Buyers of Wi-Fi equipment and systems must be assured that all products have the performance and stability to carry mission-critical applications and data. However, testing of Wi-Fi, or 802.11, devices and systems for performance and stability is a challenge for the industry because of the complexity of the 802.11 protocol.
	Creating Wi-Fi Test Metrics May 2005 By Graham Celine The constant mobility of the wireless LAN user coupled with the inherent instability of the unwired medium - air - make the 802.11 protocol an order of magnitude more complex than equivalent wired protocols.
	Cellular or WiFi? April 2005 By Fanny Mlinarsky, Azimuth Systems, and Ian Sherlock, Texas Instruments As the adage goes: “The good thing about standards is that there are so many of them.” Does the world need yet another one?
	Next Generation Voice Testing April 2005 By Graham Celine As cellular and Wi-Fi technologies converge, platforms such as VoIP and VoWi-Fi, along with Wi-Fi enabled handsets, will call for a new paradigm for voice testing in the unlicensed spectrum.
	Metrics And Methods Bring VoWLAN Success March 2005 By Fanny Mlinarsky Emerging standards, suitable metrics, and appropriate testing methods smooth the way for the deployment of voice over WLAN.
	WLAN Testing Relies On Controlled RF February 2005 By Graham Celine Emerging 802.11 Test Methods Accurately Validate WLAN Solutions By Controlling RF Interference In A Cabled Environment.
	Effective WLAN Testing Begins to Emerge January 2005 By Dr. Charles Wright and Graham Celine WLAN Designers must Analyze Perfromance, Scalability and Mobility Metrics with a Reliable Real World Approach.
	Wi-Fi Testing Using a Cabled RF Environment December 2004 By Fanny Mlinarsky As Wi-Fi technology matures, wireless LANs are moving from the relatively tolerant SOHO market to the demanding enterprise. Enterprise IT managers need accurate performance data on wireless systems to ensure the interoperability, functionality, and performance of the wireless infrastructure.
	Wi-Fi Metrics October 2004 By Fanny Mlinarsky The 802.11 Wireless Local Area Network (WLAN) technology commonly known as Wi-Fi has been steadily gaining popularity. The 802.11T Task Group is persueing standardization of test metrics and methods. This article addresses the metrics and the need for them.