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M. K. Müller, M. Meidlinger, M. Rupp:
"Correlated UE Impairments in ZF MU-MIMO Transmissions";
Poster: IEEE Sensor Array and Multichannel Signal Processing Workshop, A Coruña; 06-22-2014 - 06-25-2014; in: "2014 IEEE 8th Sensor Array and Multichannel Signal Processing Workshop (SAM)", (2014), 317 - 320.

Applying Multiple Input Multiple Output (MIMO)
techniques in wireless communication allows the parallel trans-
mission of several data streams, thus increasing the throughput
while leaving the transmit power unchanged. However, the
maximum number of parallel streams is defined by the minimum
of transmit- or receive-antennas, where in the downlink the User
Equipment (UE) is most likely the limiting factor. To overcome
this situation, multiple UEs can be served in parallel by Multi
User (MU)-MIMO. Zero Forcing MU-MIMO is a low complex
technique that tries to cancel the interference between the streams
already at the Base Transceiver Station and that requires only one
receive antenna per UE. However, due to various transmission
impairments, there exists some residual interference degrading
the performance. In this paper we illustrate the negative effects of
correlated UEs by providing measurement and simulation results.
The measurements are carried out with the Vienna MIMO
Testbed and not only is the channel estimation performed by
measurements, but also the data transmission is performed over
physical channels.

LTE-A, Measurement, Zero Forcing, MU- MIMO

https://ieeexplore.ieee.org/document/6882405

Project Head Christoph Mecklenbräuker:
Christian Doppler Lab "Funktechnologien für nachhaltige Mobilität"