DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS

摘要

A distributed antenna system includes a master unit (502) configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source (490). The master unit (502) is configured to frequency convert at least one of the MIMO channel signals L1, L2 to a different frequency from an original frequency, and combine the MIMO channel signals L1, L2 for transmission. An optical link (602) couples the master unit (502) with a remote (506) for transceiving the MIMO channel signals. The remote unit (506) is configured to receive the MIMO channel signals L1, L2 to be transmitted over antennas (648, 650) and includes an extension port (628) configured to transceive at least one of the MIMO channel signals L1, L2. An extension unit (510) is coupled to the remote unit (506) and is configured to frequency convert at least one of the first and second MIMO channel signals L1, L2 from the different frequency back to an original frequency for transmission over an antenna (650).