Rohde & Schwarz and ASTRI Demonstrate 2x2 MIMO Test Solution on an LTE-Advanced Small Cell

Rohde & Schwarz performs together with ASTRI a live test on a 2x2 MIMO base station in the uplink and downlink at the Mobile World Congress 2013. Hong Kong Applied Science and Technology Research Institute (ASTRI) provides an LTE-Advanced small cell as the device under test. What makes this demonstration special is that the 2x2 MIMO signal is generated and analyzed using only a single measuring instrument each.  

Munich — Multiple input multiple output (MIMO) is an effective method for increasing data rates and employs multiple antennas at the transmit and receive end. MIMO is used in state-of-the-art mobile radio standards such as 3GPP LTE/LTE-Advanced, HSPA+ and WLAN 802.11n. This is why the efficient testing and generation of LTE MIMO signals is crucial for makers of wireless communications infrastructure equipment such as base stations and small cells.  

The test setup from Rohde & Schwarz and ASTRI includes a high-end R&S SMU200A vector signal generator, which generates a faded EUTRA/LTE uplink signal with 2x2 MIMO. This MIMO signal is received and demodulated by ASTRI's LTE-Advanced small cell. The R&S RTO digital oscilloscope acquires the 2x2 MIMO downlink signal output by the small cell. The signal is analyzed on a PC using the R&S FS-K102PC EUTRA/LTE downlink MIMO software.   

The R&S RTO oscilloscope is well-suited for this application since it can acquire an up to 4x4 MIMO signal thanks to its four input channels. The frontends of the R&S RTO have outstanding characteristics such as high input sensitivity and extremely low noise. The high dynamic range of the R&S RTO delivers signal analysis results comparable with those of a mid-range signal analyzer.  

Thanks to its two-path architecture, the R&S SMU200A is ideal for carrying out receiver tests on 2x2 MIMO systems requiring two signal sources. In addition, standard-compliant MIMO fading must be simulated to determine the performance of the base station under realistic operating conditions. The R&S SMU200A combines RF and baseband signal generation and fading simulation for 2x2 MIMO in a single instrument, making it possible to carry out the 3GPP conformance testing on MIMO base stations with minimal use of hardware.  

The Hong Kong Applied Science and Technology Institute (ASTRI), the leader in LTE and LTE-Advanced small cell technology, provides the DUT for the test setup. The company has been developing reference designs for TD-LTE and LTE FDD small cells since 2008, including the first market-ready reference designs for small cells supporting both TD-LTE and LTE FDD. For development, ASTRI relies on Rohde & Schwarz test solutions. For example, ASTRI already characterized 4x4 MIMO antenna configurations with the help of an R&S RTO oscilloscope and two R&S SMU200A vector signal generators.  

Rohde & Schwarz and ASTRI demonstrate the test solution live at the Rohde & Schwarz booth (hall 6, booth E30) at the Mobile World Congress, which will be hosted at the new Fira Gran Via exhibition center in Barcelona.  

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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 almost 80 years ago, Rohde & Schwarz has a global presence and a dedicated service network in over 70 countries. It has approx. 8700 employees and achieved a net revenue of Euros 1.8 billion (US$ 2.3 billion) in fiscal year 2011/2012 (July 2011 to June 2012). Company headquarters are in Munich, Germany.  


Hong Kong Applied Science and Technology Research Institute (ASTRI) was founded by the HKSAR Government in 2000 with the mission to enhance technological competitiveness of 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. Its R&D efforts traverse five major areas: Communications Technologies, Enterprise & Consumer Electronics, IC Design, Material & Packaging Technologies and Bio-medical Electronics. An Exploratory Research Laboratory was also established to perform research on emerging and interdisciplinary technologies. Since inception, ASTRI has produced many world-class technologies. It has also nurtured teams of excellent researchers, produced a volume of intellectual properties and created real economic impact by transferring technologies to its clients in Hong Kong, the Mainland and the region.  

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Executive Board: Manfred Fleischmann  (Chairman),  Christian Leicher, Gerhard Geier, Company's Place of Business: Muenchen,  Commercial Register No.: HRA 16 270,  Personally Liable Partner: RUSEG Verwaltungs-GmbH,  Company's Place of Business: Muenchen,  Commercial Register No.: HRB 7 534, VAT Identification No.:  DE 130 256 683,  WEEE Register No.: DE 240 437 86  


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