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 MIMO measurements made simple

The EMITE-patented testing technology originated in the cuttlefish eye, a technology from nature, which instead of observing the amount of light, it observes the changes in the polarization of light. With an extension to the UE, the USA, Japan and South Korea, the EMITE patents have been granted the highest qualification rank. The W-shaped cuttlefish eye, when moved to a multiple-cavity reverberation chamber by EMITE, separates transmit from receive antennas and enhances the repeatability of results by including multiple sources at the lower cavity for each transmit signal into the upper cavity. The multiple-cavity design is enhanced by an additional cavity for equipment, cables and electronics. With the lower measuring cavity free of electronics, system accuracy also improves over conventional single-cavity designs. Multiple antenna sourcing, also known as source-stirring, is also patent-protected by EMITE. Multiple antennas act as transmit antennas in the upper cavities. Stirring is further enhanced with polarization stirring by using different polarization schemes in the transmit antennas, with platform stirring by a rotating platform where both the reference antenna and the antennas or devices under test are placed, and with frequency-stirring in passive mode by adding to the sample set for a specific frequency value those samples in neighborhood values in a manner which is user-specified. The result is the most-advanced most-accurate and fastest multiple-cavity mode-stirred source-stirred reverberation chamber in the market. A nice outfit design presents it to the customer. Finally, as in any other test equipment, the unit interacts with the user with a Front Panel, a Back Panel and a very intuitive and easy-to-use Graphic User Interface (GUI) software. An engineer can be trained within 1 day to fully use the EMITE Test Systems in their entire capabilities. Any auxiliary equipment needed for the test, including Vector Network Analyzers (VNAs), base station emulators (BSE or eNodeBs), channel emulators (CEs), Access Points (APs) or wireless STAtions (STAs) are fully-controlled by EMITE GUI Software, really making MIMO measurements simple for the end-user.

 

EMITE test systems can accommodate small devices (up to 8 smartphones) in the PT-Series, medium devices (smartphones, tablets, access points and notebooks) in the E-Series and large devices and front-ends (smartphones, tablets, access points, notebooks, monitors, trash compactors, frontal car parts, fridges, serving machines, etc.) in the F-Series.

 

Three different Test Modes are available:

 

 

 

 


                       Passive Mode testing

in which the RF channel model and fading performance of multiple antennas (up to 8 simultaneous ones testing 8x8 MIMO) embedded in front-ends is measured, providing performance metrics of interest to design, development and tweaking stages. Figures of Merit (FoMs) include radiation efficiency, correlation, diversity and MIMO capacity, among others. These metrics are very useful for characterizing the efficiency of the RF front-end, including antennas, of a prototype, and how close to its Shannon capacity it can get, avoiding bottlenecks for the high-demanded spectral efficiencies.  


                                            Radiation2

 

 

 

 

 


                  Active MIMO OTA testing

in which an active receiver in a commercial or a prototype device interacts with a base station emulator to provide standardized and proprietary figures of merits such as Total Radiated Power (TRP), Primary, Secondary/MIMO and overall Total Isotropic Sensitivity (TIS), Downlink and Uplink Throughput (TPUT), Channel Quality Indicator (CQI), or Rank Indicator (RI), among others.The channel model emulated by the reverberation chamber is that of the NIST (National US Institute of Standards and Technology). With a Root-Mean-Square Delay Spread around 80ns and an exponential decay fading profile, the NIST channel model is ideally suited for the emulation of urban, outdoor-to-indoor and indoor scenarios, which makes the reverberation chamber a natural test system for wireless and cellular technologies. When combined to a channel emulator (CE), the reverberation chamber can also test more complex fading scenarios, like IS-UMi or IS-UMa, among others.  


                            LTETPUT CA

 

 

 

 

 


            Time-domain MIMO testing

in which tests are run against time to collect a number of sample results which form an ensemble of data. Pre-characterization includes measuring Root Mean Square Delay Spreads (RMS-DS), Power Delay Profiles, Standard Deviation (STD), Coherence Bandwidths (CBW) and average Path Loss (PL) of the test scenario, while TCP/UDP TPUT can be used to characterize WLAN devices (Access Points, CPEs and STAtions) in both downlink and uplink. Testing WiFi downlink and uplink TCP/UDP MIMO OTA Throughput with EMITE Test Systems is extremely easy and allows for full overnight automation, something again unique in the market. The WiFi TCP/UDP TPUT EMITE Test Systems has been selected by the leading Japanese carrier for its Test Plan, by the leading smartphone OEM manufacturer in South Korea and by the leading tablet OEM manufacturer in the US. The EMITE test systems can also be uniquely used as a fader, in which no testing is performed and the chamber is just providing a user-defined fading sequence to the DUT. DUT-proprietary software helps testing Base Station/Access Point firmware. 


                            PS

 

 

 EMITE provides worldwide-unique testing features

There are many unique technical advantages of EMITE test systems our customers make use of and that cannot be found in competitors. The close proximity to market needs and our constant search for customer satisfaction, along with our view to provide a simple solution out of a complex test tool with a view on what customers need has made us developed very interesting features.

Ask for a Presentation or a Life Demonstration on our unique features.  

sales@emite-ing.com