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Propsim Channel Emulation MIMO Over-the-Air (OTA) Testing

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Keysight Technologies

Propsim Channel Emulation MIMO

Over-the-Air (OTA) Testing

Verify the Actual Performance of a Mobile Device with Keysight’s Future-Proof Integrated Test Solution

LTE delivers an improved end-user experience with faster data rates compared to WCDMA HSPA+. Faster data rates lead to more complex mobile devices that require more extensive testing prior to market introduction. As a result many mobile operators and device manufacturers conduct performance testing based on channel emulators to develop and launch products that meet end-users’ increasing expectations. Propsim radio channel emulators from Keysight Technologies accurately simulate the characteristics of real-world radio channel conditions within a laboratory environment. cost-effective investment. 

Achieve Compliance with Industry Test Plans Mandated by CTIA, 3GPP and CCSA

MIMO (Multiple Input, Multiple Output) – a key feature in LTE and LTE Advanced – delivers higher bandwidth and data rate services to end users. Mobile devices with MIMO technology - where both the base station and the device are equipped with multiple transmit and receive antennas - are highly complex and difficult to test. Over-the-Air (OTA) testing effectively overcomes this complexity by incorporating the device antenna performance. Perform tests under similar conditions to how the device operates in the real world – in other words – without any cables connected to it.

Use MIMO OTA performance testing to evaluate the end user’s experience accessing data services on a mobile device. All critical parts of the mobile device design – including the antennas, RF front end, baseband processing – are thoroughly and simultaneously tested in real-life conditions. Poorly designed devices significantly increase network load and optimization issues, so major mobile operators mandate specific test requirements to ensure correct device performance.

Complex devices require efficient, precise and non-intrusive testing that emulates realworld field conditions across a large sample of devices and over various manufacturing runs. MIMO OTA device testing accurately emulates the end-user’s experience when accessing applications, downloading video in ‘landscape mode’ or browsing in ‘portrait mode’.

Create realistic RF conditions with Propsim Channel Emulators

Propsim channel emulators create realistic RF conditions for testing MIMO devices within an anechoic or reverberation type chamber. Keysights’s Propsim F32 can test up to 32 RF and 128 MIMO channels in a single box. This makes it a future-proof and cost-effective solution for testing carrier aggregation capable LTE-Advanced devices. Propsim F32 offers more than twice the emulation capacity compared to other products on the market. Its unique multi-link capacity enables easy configuration across a wide range of test configurations.

Propsim F32 is the only single box channel emulator solution available on the market that supports a configuration of 8 or 16 dual-polarized probe antennas. This set-up creates a multi-probe environment around the device for even more accurate performance testing.

Verify the Actual Performance of Mobile Devices with MIMO OTA Testing

Test from early stage development through market acceptance

The Propsim tools and applications enable you to test a device from early stage research and development through to market introduction. Keysight supports mobile operator test plans across the globe by developing and implementing relevant test cases. As the main contributor to all relevant channel models used in the wireless industry – Winner, Winner II, 3GPP, CTIA, ITU, METIS (5G) – Keysight has the largest pool of patents in the field of radio channel modeling and emulation. 

Consistent and reliable MIMO OTA testing in an anechoic chamber

MIMO OTA testing performed in an anechoic chamber fulfills all technical requirements set by 3GPP, CCSA and CTIA. It also enables the most consistent and reliable test results, even for future features such as Uplink MIMO, CoMP and adaptive antennas.

The Propsim F32 channel emulator is compliant with the draft CTIA specification related to MIMO OTA testing of all currently planned LTE transmission modes in anechoic chamber system installations. This enables you to verify that a particular mobile device meets expected industry and operator requirements. Propsim F32 is ideally suited for OTA testing in an anechoic chamber due to its high RF I/O capacity, compact size, ease of use and configurability.

Propsim’s advanced modeling tools enable device testing in the R&D phase using a wide range of use case scenarios. Propsim MIMO OTA and field-to-lab Virtual Drive Testing Toolset enable you to define and create customized test scenarios based on data (RF propagation conditions) captured in an existing network.   

Simplify OTA testing in a reverberation chamber

Propsim FS8 is ideal for OTA testing in a reverberation chamber because it enables simple control of critical parameters. This includes dynamic mobile speed, multipath profile, range delay and base station antenna correlation. Other parameters include noise and inter-symbol interference caused by base station signals as well as distant propagation path reflections to the device.

Over-the-air testing in a reverberation chamber based on a Propsim FS8 channel emulator allows you to assess a device’s average data throughput performance relative to other devices. In this case, isotropic SCME-based channel models (Long and Short Delay Spread) for transmit diversity modes (TM2) as defined in the CTIA MIMO OTA test plan are used. 

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