DISTRIBUTED RADIO COMMUNICATION BASE STATION SYSTEM, BASE BAND UNIT, REMOTE RADIO UNIT, AND METHOD FOR OPERATING DISTRIBUTED RADIO COMMUNICATION BASE STATION SYSTEM

摘要

Since a sampling frequency of RRU is always constant, A/D conversion may be performed with a sampling frequency higher than necessary with respect to a frequency band width of a radio signal.;A sampling frequency change function, and the sampling frequency is reduced in a range where a aliasing component does not deteriorate signal quality of a desired signal component when the sampling frequency is decreased, based on radio band allocation information, or signal transmission between BBU and RRU is stopped in a no signal section, whereby a band required for digital RoF transmission between the BBU and the RRU is reduced.