Patent ID: 8711903

Claim:
An antenna system connectable to a base station, the antenna system comprising: a plurality of antenna elements forming an antenna for transceiving multi-frequency carrier signals; a digital radio unit connected to at least one of the plurality of antenna elements, wherein the digital radio unit comprises: a plurality of digital micro radios for receiving and sending digital radio signals, wherein each of the plurality of digital micro radios is connected to a respective one of the plurality of antenna elements, each of the digital micro radios having a digital down-converter and a digital up-converter and a digital signal converter; whereby each of the plurality of micro radios converts the digital radio signals to analogue RF (radio frequency) signals and vice versa; and a plurality of hubs for processing digital radio signals and control signals and for routing said digital radio signals and control signals via a plurality of digital links and a plurality of interfaces, a respective one of the plurality of digital links being provided between a respective one of the plurality of hubs and a respective one of the plurality of micro radios, wherein each of the plurality of hubs comprises a frequency multiplexer and demultiplexer unit for up and down-converting base band signals to and from sub-carrier frequencies; a sample rate converter for adjusting sampling frequency of the frequency multiplexer and demultiplexer.