Equalization of MIMO-ISI Channels based on Gaussian Message Passing in Factor Graphs
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
International Symposium on Turbo Codes & Iterative Information Processing
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
In this paper we consider a soft-input soft-output
equalizer, for MIMO intersymbol interference channels, used
in a turbo equalization scheme. We derive the equalizer on
the basis of a cyclic factor graph representation and the sumproduct
algorithm, with two different message schedules (serial
and parallel). In the sum-product algorithm we use Gaussian
messages, which results in a low-complexity LMMSE equalizer
implementation. Computer simulations show that, for the turbo
equalization application, the proposed equalizer has a good
bit error rate performance compared with the optimal MAP
equalizer, while achieving a remarkable reduction in complexity.
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