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M. Rupp, O. Fresnedo, L. Castedo:
""Explicit MMSE MIMO transceiver solution for analog joint source channel coding";
Talk: The eleventh international symposium on wireless communication systems, Barcelona; 08-26-2014 - 08-29-2014; in: "The eleventh International Symposium on Wireless Communication Systems", (2014), 266 - 270.

The joint design of optimal linear Minimum MSE
(MMSE) filters at the transmitter and receiver of a Multiple-Input
Multiple-Output (MIMO) system arises as a natural problem
when transmitting discrete-time continuous-amplitude sources
using analog Joint Source Channel Coding (JSCC). In this work,
we derive an explicit closed form solution for the MMSE linear
precoder and equalizer of a MIMO system under a transmit
power constraint. Such a solution is specially suitable for analog
JSCC because it preserves the low complexity and negligible
delay distinctive of this type of systems. We also show that
the obtained solution for the MMSE linear precoder resembles
the waterfilling algorithm and provides the optimal MMSE
distribution of the transmit power among the different data
streams. The performance of the explicit MMSE transceiver is
evaluated in the context of analog JSCC transmissions for MIMOOFDM
channels and the obtained results show that the system
closely approaches the theoretical limits and outperforms the
zero forcing (ZF) precoding. Finally, we derive some interesting
properties of MIMO systems with MMSE linear precoder and
equalizer, and quantify their superior performance with respect
to those that use ZF linear precoding and/or ZF equalization.

The joint design of optimal linear Minimum MSE
(MMSE) filters at the transmitter and receiver of a Multiple-Input
Multiple-Output (MIMO) system arises as a natural problem
when transmitting discrete-time continuous-amplitude sources
using analog Joint Source Channel Coding (JSCC). In this work,
we derive an explicit closed form solution for the MMSE linear
precoder and equalizer of a MIMO system under a transmit
power constraint. Such a solution is specially suitable for analog
JSCC because it preserves the low complexity and negligible
delay distinctive of this type of systems. We also show that
the obtained solution for the MMSE linear precoder resembles
the waterfilling algorithm and provides the optimal MMSE
distribution of the transmit power among the different data
streams. The performance of the explicit MMSE transceiver is
evaluated in the context of analog JSCC transmissions for MIMOOFDM
channels and the obtained results show that the system
closely approaches the theoretical limits and outperforms the
zero forcing (ZF) precoding. Finally, we derive some interesting
properties of MIMO systems with MMSE linear precoder and
equalizer, and quantify their superior performance with respect
to those that use ZF linear precoding and/or ZF equalization.

MIMO, MMSE

http://dx.doi.org/10.1109/ISWCS.2014.6933359

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6933359

Project Head Markus Rupp:
Mobile Access Research 2013