DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS
    2.
    发明公开

    公开(公告)号:EP3506521A1

    公开(公告)日:2019-07-03

    申请号:EP18204606.0

    申请日:2011-09-30

    摘要: A distributed antenna system (110), comprising a master unit (46) configured to receive at least one set of multiple input multiple output (MIMO) channel signals at an original MIMO frequency from at least one signal source, at least one set of the MIMO channel signals including at least a first MIMO channel signal and a second MIMO channel signal; generate a local oscillator signal; frequency convert the at least one of the first MIMO channel signal and the second MIMO channel signal from an original MIMO frequency to a different frequency different from a first legacy service frequency band using the local oscillator signal; combine the first MIMO channel signal, the second MIMO channel signal, and the local oscillator signal for transmission; an optical link (48) operably coupled with the master unit (46); a remote unit (112) communicatively coupled with the master unit (46) via the optical link (48) for transceiving the first MIMO channel signal and the second MIMO channel signal, the unit including band processing circuitry configured to process the at least one of the first MIMO channel signal and the second MIMO channel signal; conversion circuitry configured to receive the at least one converted MIMO channel signal and to frequency convert the at least one converted MIMO channel signal from the different frequency different from the first legacy service frequency band back to the original MIMO frequency for transmission over one or more antennas (44a, 44b, 132a, 132b, 216a, 216b, 216c, 216d).