Aeroflex has added support for 4x2 multi-input multi-output (MIMO) to the 7100 digital radio test set for the R&D testing of LTE user equipment (UE) being designed with this feature.
4x2 MIMO is used adaptively to offer improved throughput in good signal conditions, and improved resilience in poor signal conditions. When the signal-to-noise ratio (SNR) at the UE is good, the device can make use of spatial multiplexing, where multiple information streams are transmitted simultaneously to improve throughput.
When the SNR is poor then transmit diversity is employed. This is where a single information stream is distributed across separately encoded antenna ports to reduce the variations in SNR experienced by the UE, thus improving the cell coverage. Measurements are made both at the base station and at the UE, and these are used to determine how many streams can be supported in the prevailing signal conditions.
Option 7100-111 is a software licence that enables 4x2 MIMO functionality and can be enabled in the field. Testing can be controlled using either command line interface (CLI) control or programming via Remote API.
This new release of the software supports 4x2 MIMO measurements on LTE in FDD mode with bandwidths of 10 MHz, 15 MHz and 20 MHz. It is planned that 1,4 MHz, 3 MHz and 5 MHz bandwidths will be added in due course.
Fading and Additive White Gaussian Noise (AWGN) measurements are supported, using the optional integral fading and AWGN generator, with configurable cross-correlation between streams.
This release of the software supports open loop spatial multiplexing, with closed loop planned to be included in the next release.
High-speed AWG generates up to 20 sine waves Vepac Electronics
Test & Measurement
Spectrum Instrumentation has released a new firmware option for its range of versatile 16-bit Arbitrary Waveform Generators, with sampling rates up to 1,25 GS/s and bandwidths up to 400 MHz.
Read more...Digitisers upgraded with pulse generator option Vepac Electronics
Test & Measurement
Spectrum Instrumentation has added the Digital Pulse Generator option to its ultrafast digitisers (with up to 10 GS/s speed) and arbitrary waveform generators.
Read more...Companies collaborate on EnviroMeter Avnet Silica
Test & Measurement
STMicroelectronics and Mobile Physics have joined forces to create EnviroMeter for accurate air-quality monitoring on smartphones. Time-of-flight optical sensing enables an accurate personal air quality monitor and smoke detector.
Read more...PCB test points Vepac Electronics
Test & Measurement
Maintaining these access points in the final production versions will prove invaluable during the life of the equipment for service, adjustment, and debug, or repair activities.
Read more...RFID reader
Test & Measurement
The EXA81 from Brady turns any smartphone or tablet into a personal radar that can pick up radio signals from all RFID-labelled items.
Read more...Proximity sensor with VCSEL Avnet Abacus
Test & Measurement
Vishay’s newest small package proximity sensor, the VCNL36828P, combines low idle current with an I2C interface and smart dual slave addressing.
Read more...CNH data output devices for AI applications Altron Arrow
Test & Measurement
STMicroelectronics’ CH family of time-of-flight sensor devices feature compact and normalised histogram (CNH) data output for artificial intelligence applications requiring raw data from a high-performance multizone ToF sensor.
Read more...Webinar: The key to smart occupancy
Test & Measurement
This one-hour session will allow the attendee to discover the company’s latest infrared sensor with high-sensitivity presence and motion detection capabilities.
printer friendly version