- Emulate MIMO conditions in the lab
- Simulates beamforming, antenna diversity and dynamic handover scenarios
- Get mobile networks fit for HSPA+ and LTE standards
The QPER MIMO Tester is a handover tester einriched with phase shifter that helps engineers to make mobile networks fit for modern standards like LTE or HSPA+.
Each radio path is equipped with a digitally controllable attenuator as well as a digitally controllable phase shifter. The latter allows to emulate the different signal transmission path lengths occuring in MIMO systems from 2×2 up to 4×4.
Emulate propagation effects under MIMO conditions
The QPER virtual drive test concept also applies to the simulation of MIMO scenarios: While UEs are moved along drive test routes on a GPS referenced map within an simply created network layout, the QPER software calculates the channel coefficient matrix of all MIMO connections and sets the phase shifters accordingly. This provides testers with the opportunity to simulate dynamic handover scenarios considering antenna diversity, reflected by phase shifts in spatial diversity environment.
The phase differences between the MIMO paths are calculated considering antenna alignments. The GUI also displays the MIMO channel matrix.
Thus, engineers can simulate in the test lab all kind of drive tests necessary to ensure MIMO and beamforming function in the mobile network.
All MIMO and SISO standards supported as well as LTE-Advanced
QPER MIMO-Tester supports all SISO and MIMO configurations and covers all LTE frequencies up to 6 GHz. It therefore also supports the LTE-Advanced standard, which makes the MIMO tester future proof.
For entire channel emulation the QPER Channel Emulator is available.
- Frequency range: 500 – 6000 MHz
- Eubus 380 MHz – 3.0 GHz Solid State Programmable Attenuator, or Eubus 700 MHz – 6.0 GHz Solid State Programmable Attenuator
- Impedance: 50 Ω
- Dynamic attenuation range: 0 – 95.5 dB
- Attenuation steps: 0.5 dB
- Eubus GHz Phase Shift (Delay Line) Module
- Dynamic electrical delay range: 0 – 705.56 ps ( ≙ 0-254° @ 1GHz Phase Shift)
- Electrical delay steps: 5.56 ps (≙ 2° @ 1 GHz)
- MIMO configurations: 2×2, 4×2, 2×4, 4×4, 8×2, 2×8, 8×4, 4×8, 8×8
- Number of switches: > 4000 / sec, real time, up to 128 parallel settings
- (i.e. up to 512.000 HW settings per second)
- Max. input power: + 23 dBm
- RF-connectors: N(f) or SMA(f), front- and/or rear side mounted
- Operating system: Windows XP, Vista or 7
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