  In this paper, we investigate the generalized degrees-of-freedom (GDoF) of
the asymmetric interference channel with delayed channel state information at
the transmitter (CSIT), where each transmitter has two antennas, each receiver
has one antenna, and the strength for each interfering link can vary. The
optimal sum-GDoF is characterized by matched converse and achievability proof.
Through our results, we also reveal that in our antenna setting, the symmetric
GDoF lower bound in [Mohanty et. al, TIT 2019] can be elevated, and the
symmetric GDoF upper bound in [Mohanty et. al, TIT 2019] is tight in fact.
