TY - JOUR T1 - MMSE filter design for Full-Duplex filter-and-forward MIMO relays under limited dynamic range JF - Signal Processing Y1 - 2019 A1 - Emilio Antonio-Rodríguez A1 - Stefan Werner A1 - R. López-Valcarce A1 - Risto Wichman KW - adaptive signal processing KW - full-duplex KW - winter AB -
We study the problem of optimizing the end-to-end performance of a full-duplex filter-and-forward MIMO relay link, consisting
of a source, a relay, and a destination node, by employing linear filtering at each node. The system model accounts for multipath
propagation and self-interference at the relay, as well as transmitter impairments and limited dynamic range at every node. The
design accommodates signals with arbitrary spectra and includes the direct link between the source and destination nodes. Under
the minimum mean square error criterion, the resulting non-convex problem is approximated by a sequence of convex problems
and solved by means of an alternating minimization method. Linear constraints allocate some of the degrees of freedom in the relay
to guarantee a sufficiently small residual self-interference. Simulations quantify the impact of degrees of freedom, the dynamic
range, and the balance between direct and relay paths on the link performance.
VL - 156 ER -