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Distributed Antenna System for MIMO Technologies

  • US 20080232305A1
  • Filed: 12/17/2007
  • Published: 09/25/2008
  • Est. Priority Date: 12/19/2006
  • Status: Active Grant
First Claim
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1. A distributed antenna system comprising:

  • a radio interface unit adapted to receive a plurality of downlink spatial streams from at least one base station, the radio interface unit including at least one mixer adapted for converting each of the spatial streams from a native frequency band to a different, non-overlapping frequency band and a downlink duplexer adapted for combining each of the spatial streams to form a combined downlink signal on to a common transmission medium;

    a base unit adapted to receive the combined downlink signal over the common transmission medium, and for transmitting the combined downlink signal to a plurality of remote units over a separate communication medium connecting the base unit to each remote unit;

    each remote unit including a multiplexer adapted for connecting the remote unit with a plurality of antenna units and for transmitting the combined downlink signal to each of the antenna units over an antenna unit communication medium;

    each antenna unit including a de-duplexer adapted for separating the combined downlink signal into each of the downlink spatial streams and at least one downlink mixer adapted for converting each of the downlink spatial streams to the native frequency band; and

    a plurality of antennae coupled to each antenna unit, one for transmitting each of the downlink spatial streams.

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