FIELD: physics, computer engineering.
SUBSTANCE: invention relates to computer engineering. The method of generating a downlink modulating signal, carried out by a radio access network node in a distributed base station with a remote radio transceiver, includes performing channel coding and modulation on a downlink data stream of a user in a cell, and obtaining a downlink coded and modulated user signal of the cell; generating a downlink control channel signal according to physical-layer control information; and forwarding the reference signal, synchronisation signal, broadcast channel signal, downlink coded and modulated user signal, and downlink control channel signal to the corresponding RRU, so that the corresponding RRU performs MIMO precoding on the downlink coded and modulated user signal, maps the MIMO-precoded signal, the downlink control channel signal, reference signal, synchronisation signal, and broadcast channel signal to subcarriers, performs inverse fast Fourier transformation to obtain a downlink modulating signal, and sends the signal out.
EFFECT: reducing the signal transmission bandwidth between a RAN node and a RRU.
13 cl, 13 dwg, 1 tbl
