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LTE: Up for a test

Posted: 24 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:LTE? WiMAX? broadband? wireless mobile? device test?

Sophisticated solutions
Further, LTE, in particular, must be able to integrate into existing cellular networks, providing seamless connectivity and a smooth user experience. "Designing this into the network operation, base station and mobile station is a challenging task since the modulation scheme is so very different from legacy systems. And all of that requires sophisticated testing solutions," said Whitacre.

A global collaborative technology trial initiative is under way. The Long Term Evolution/System Architecture Evolution Trial Initiative (LSTI) is focused on accelerating the availability of commercial and interoperable next-generation LTE mobile broadband systems.

LSTI was formally launched in May 2007 by leading telecommunications companies Alcatel-Lucent, Ericsson, Nokia, Nokia Siemens Networks, Nortel, Orange (France Telecom), T-Mobile and Vodafone. Since the group's inception, membership has expanded to include Agilent, China Mobile, Huawei, LG Electronics, Motorola, NTT Docomo, NXP, Rohde & Schwarz, Samsung, Signalion, Telecom Italia, Telefonica, Qualcomm, ZTE and, most recently, Azimuth Systems.

Azimuth provides test equipment and channel emulators for Wi-Fi, WiMAX, LTE and 2G/3G cellular technologies. Its channel emulators meet the performance requirements of these MIMO and OFDM-based systems for both devices and infrastructure.

"LTE represents a major technology paradigm shift," said George Reed, vice president of marketing and product management at Azimuth. Legacy test tools, including channel emulators, lack the necessary RF fidelity, Reed said, and with new MIMO solutions being used to increase channel throughput and improve performance, "channel emulation has become central to laboratory-based MIMO testing."

Reed claimed Azimuth's ACE MX architecture offers "the highest RF performance in the industry and is the most scalable and flexible product available, with support for 2G, 3G and 4G wireless standards."

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