8. An apparatus for wireless communications by a base station, comprising:at least one processor configured to:
transmit, on a narrowband region within a wider system bandwidth, a directional primary synchronization signal (DPSS);
receive feedback information from one or more user equipments (UEs) based on the DPSS, wherein the feedback information comprises an indication of a bandwidth capability of a UE that transmitted the feedback information;
allocate resources to the one or more UEs within at least one of the wider system bandwidth or the narrowband region based, at least in part, on the feedback information; and
performing beam training, in addition to the DPSS transmission, by transmitting beam tracking waveforms to at least one UE of the one or more UEs using different combinations of directions and bandwidth regions in a region of the wider system bandwidth that is wider than the narrowband region; and
a memory coupled with the at least one processor.