US 9,813,127 B2
Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
Jacob George, Horseheads, NY (US); Anthony Ng'Oma, Horseheads, NY (US); and Hejie Yang, Painted Post, NY (US)
Assigned to Corning Optical Communications LLC, Hickory, NC (US)
Filed by Corning Optical Communications LLC, Hickory, NC (US)
Filed on Jan. 18, 2016, as Appl. No. 14/997,694.
Application 14/997,694 is a continuation of application No. 14/487,232, filed on Sep. 16, 2014, granted, now 9,258,052.
Application 14/487,232 is a continuation of application No. PCT/US2013/034328, filed on Mar. 28, 2013.
Claims priority of provisional application 61/618,396, filed on Mar. 30, 2012.
Prior Publication US 2016/0134348 A1, May 12, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/04 (2017.01); H04B 10/2575 (2013.01); H04B 7/06 (2006.01); H04B 7/10 (2017.01); H04B 7/0413 (2017.01); H04B 7/024 (2017.01)
CPC H04B 7/0469 (2013.01) [H04B 7/024 (2013.01); H04B 7/0413 (2013.01); H04B 7/06 (2013.01); H04B 7/10 (2013.01); H04B 10/25753 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A multiple-input multiple-output (MIMO) remote unit configured to wirelessly distribute MIMO communications signals to wireless client devices, comprising:
at least one optical-to-electrical (O/E) converter;
a first MIMO transmitter comprising a first MIMO transmitter antenna configured to transmit MIMO communications signals in a first polarization and a second MIMO transmitter antenna configured to transmit MIMO communications signals in a second polarization different from the first polarization; and
a second MIMO transmitter comprising a third MIMO transmitter antenna configured to transmit MIMO communications signals in the first polarization and a fourth MIMO transmitter antenna configured to transmit MIMO communications signals in the second polarization;
the first MIMO transmitter configured to:
receive a first optical downlink MIMO communications signal in a first phase over a first downlink communications medium, and transmit the first optical downlink MIMO communications signal wirelessly as a first downlink MIMO communications signal over the first MIMO transmitter antenna in the first polarization; and
receive a second optical downlink MIMO communications signal in the first phase over a second downlink communications medium, and transmit the second optical downlink MIMO communications signal wirelessly as a second downlink MIMO communications signal over the second MIMO transmitter antenna in the second polarization;
the second MIMO transmitter configured to:
receive a third optical downlink MIMO communications signal in the first phase over a third downlink communications medium, and transmit the third optical downlink MIMO communications signal wirelessly as a third downlink MIMO communications signal over the third MIMO transmitter antenna in the first polarization; and
receive a fourth optical downlink MIMO communications signal over a fourth downlink communications medium, and transmit the fourth optical downlink communications signal in a second phase shifted from the first phase, wirelessly as a fourth downlink MIMO communications signal over the fourth MIMO transmitter antenna in the second polarization.