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The Applied Science and Technology Research Institute (ASTRI) from Hong Kong has successfully verified its TD LTE Femto base stations using advanced test solutions provided by Rohde & Schwarz. In accordance with the latest 3GPP specification TS36.141, transmitter and receiver characteristics as well as receiver performance under fading conditions must be tested. As part of the verification process, the two companies tested the HARQ and timing-advance functionality of the base stations under realtime conditions for the first time.

To generate the TD LTE signal, Rohde & Schwarz uses either the R&S AMU baseband signal generator or the R&S SMU RF signal generator. For conformance testing, the LTE realtime uplink feedback option is now available for both instruments. The Femto base station under test, designed by ASTRI using picoChip's platform, sends a realtime feedback in line with 3GPP specifications to the generator. In this way, the HARQ as well as the timing-advance functionality can be verified for the uplink. Both functions are needed to simulate the correct feedback behavior between the base station and the terminal. In addition, it is possible to determine the current data throughput that the base station achieves under defined fading conditions. This throughput is a measure of the base station's receiver performance.

Rohde & Schwarz instruments have long been used in the development of ASTRI TD LTE Femto base stations and test terminals. The additional test solution is also being successfully implemented in LTE FDD base station testing.

About Rohde & Schwarz
Rohde & Schwarz is an independent group of companies specializing in electronics. It is a leading supplier of solutions in the fields of test and measurement, broadcasting, radiomonitoring and radiolocation, as well as secure communications. Established more than 75 years ago, Rohde & Schwarz has a global presence and a dedicated service network in over 70 countries. It has approx. 7400 employees and achieved a net revenue of € 1.2B (US$ 1.7B) in fiscal year 2008/2009 (July 2008 to June 2009). Company headquarters are in Munich, Germany.

About Hong Kong Applied Science and Technology Research Institute (ASTRI)
The Hong Kong Applied Science and Technology Research Institute (ASTRI) was founded by the Government of Hong Kong Special Administrative Region in 2000 to enhance technological advances for Hong Kong through applied research. In 2006, ASTRI was designated the Hong Kong Research and Development Centre for Information and Communications Technologies by the Innovation and Technology Commission to perform leading-edge R&D for technology transfer to industry, to develop technical human resources and to act as a focal point bringing together industry and university R&D assets. Over the past years, ASTRI has been conducting a spectrum of world-class and customer-focused R&D, and has built teams of excellent researchers, produced a volume of intellectual properties and created real economic impact by transferring technologies to its clients in Hong Kong, mainland China and the region.

SOURCE: Rohde & Schwarz GmbH & Co. KG