METHOD AND APPARATUS FOR GENERATING REFERENCE SIGNAL IN ANALOG/DIGITAL MIXED BF SYSTEM

摘要

A millimeter radio wave communication system. In a method for operating a base station (BS) in an analog/digital mixed BF system, an analog BF direction is determined. A digital BF precoder is determined for the determined analog BF direction. Digital BF precoding is performed using the digital BF precoder with respect to the determined analog BF direction. A DownLink Reference Signal (DL RS) is transmitted in the analog BF direction on which the digital BF precoding has been performed.

主权项

1. An apparatus for a transmitter in a wireless system, the apparatus comprising:
a digital beamforming unit configured to generate precoded signals by precoding a plurality of downlink reference signals (DL RSs); a plurality of radio frequency (RF) chains coupled to the digital beamforming unit, the plurality of RF chains are configured to determine a direction of each of the precoded signals; a plurality of antenna elements subsets respectively coupled to each of the plurality of RF chains, the plurality of antenna elements subsets are configured to transmit the precoded signals based on the determined direction, wherein the precoded signals are transmitted through a plurality of subcarriers in the determined direction.