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Test mobile adds Cat5 UE emulation capability

Posted: 05 Apr 2012 ?? ?Print Version ?Bookmark and Share

Keywords:test mobile? LTE? eNodeB?

Aeroflex Ltd has revealed that the TM500 LTE Test Mobile is the first test mobile to emulate LTE Category 5 (Cat5) user equipment (UE). According to the company, this allows operators to verify the operation of their networks and equipment vendors to prove the performance of their eNodeB (LTE base stations) at the higher data rates that are enabled by Cat5 handsets and terminals.

Cat5 is a classification for LTE UEs that provides enhanced data rates for both UL and DL. Using a 20MHz bandwidth and FDD under good channel conditions, a data rate of 300Mb/s is available in the downlink, due to the addition of support for 4x4 MIMO. In the uplink the data rate is boosted to 75Mb/s by taking advantage of 64QAM modulation in addition to the earlier QPSK and 16QAM. Cat5 also introduces limited buffer rate matching in the DL, which confines the memory requirements allowing for cost effective handsets, explained the company.

TM500 LTE

The TM500 LTE can emulate LTE Cat5 UE.

The TM500 Test Mobile now provides demodulation and decoding of downlink signals transmitted in 4x4 MIMO, and transmission of uplink signals modulated using 64QAM, in support of these higher LTE data rates. Its "per antenna" measurement capability allows the engineers to validate eNodeB RF functionality with direct cabling, while its "per RF path" measurements offer a powerful tool for use over the air during field trials. It is used for studying the use cases that maximize the benefits of the four-transmitter topology of 4x4 MIMO. A constellation plot is also available, which provides the engineer with a rapid scan of the signal quality, Aeroflex described.

The TM500 Test Mobile can also be used in stress test cases at an early stage in the development of Cat5, where one or two of the TM500 units are used in an attempt to use all the eNodeB resources while other handsets or UE also required to be served.





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