Patent ID: 11902925
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 11:
12. A distributed antenna system including a baseband modem and a plurality of distributed antennas comprises:
a plurality of distributed units DU; and
a central unit (CU) operatively coupled to the plurality of distributed units and to control the plurality of distributed units,
wherein the central unit calculates frequency offsets for each RF path in the baseband modem, controls an oscillator clock of the central unit (CU) on the basis of an average of the frequency offsets, controls oscillator clocks of each distributed unit (DU) on the basis of the frequency offsets for each RF path when the operation mode of the baseband modem is a tracking mode, and transmits the oscillator clock of the central unit (CU) to each distributed unit (DU) when the operation mode of the baseband modem is an acquisition mode,
wherein, in the tracking mode, the central unit (CU) individually controls oscillator clock errors of each distributed unit (DU) to have different values, and in the acquisition mode, the central unit (CU) commonly controls the oscillator clock errors of each distributed unit (DU) to have the same value.