Distributed antenna system for MIMO signals
First Claim
1. A system comprising:
- circuitry for coupling with a source of a multiple-input and multiple-output (MIMO) signal configured to provide a first branch of a MIMO signal and at least a second branch of the MIMO signal, the branches of the MIMO signal being in the same frequency channel;
at least one master unit and a respective plurality of remote units coupled with the master unit, the at least one master unit coupled with the MIMO signal source and configured for providing RF processing of the MIMO signals and for distributing signals to one or more remote units;
at least another master unit and another respective plurality of remote units coupled with the another master unit, the another master unit coupled with the MIMO signal and configured for providing RF processing of the MIMO signals and for distributing signals to one or more remote units;
a hybrid coupler coupled to receive the first branch of the MIMO signal and the second branch of the MIMO signal on respective first and second input ports and configured to provide output signals on first and second output ports, the output signal on the first output port including at least a portion of the first branch of the MIMO signal and at least a portion of the second branch of the MIMO signal that is phase shifted orthogonally in relation to the respective second branch of the MIMO signal and the output signal on the second output port including at least a portion of the second branch of the MIMO signal and at least a portion of the first branch of the MIMO signal that is phase shifted orthogonally in relation to the respective first branch of the MIMO signal;
a first plurality of remote units with each remote unit configured for communicating the output signal of the first output port of the hybrid coupler but not the output signal from the second output port from a single antenna coupled with a respective remote unit, the output signal of the first output port including portions of both the first and second branches of the MIMO signal;
a second plurality of remote units with each remote unit configured for communicating the output signal of the second output port of the hybrid coupler but not the output signal of the first output port from a single antenna coupled with a respective remote unit, the output signal of the second output port including portions of both the first and second branches of the MIMO signal that are different from the output signal of the first output port;
the system configured for communicating both the output signal of the first output port and the output signal of the second output port through the different plurality of remote units with respective single antennas to be used by a device for providing MIMO communications.
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Accused Products
Abstract
A distributed antenna system includes a multiple-input and multiple-output (MIMO) base station configured to output at least a first signal and a second signal. At least one master unit communicates with the MIMO base station. At least one remote unit communicates with the master unit. At least one antenna is coupled with the remote unit for receiving signals from the remote unit. A hybrid coupler is coupled between the remote unit and antenna and is configured to receive the first signal Ch1 and the second signal Ch2 from the remote unit on respective first and second ports and to provide an output signal on at least one output port. The output signal includes at least a portion of the first signal and at least a portion of the second signal. The antenna is coupled with the output port.
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Citations
17 Claims
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1. A system comprising:
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circuitry for coupling with a source of a multiple-input and multiple-output (MIMO) signal configured to provide a first branch of a MIMO signal and at least a second branch of the MIMO signal, the branches of the MIMO signal being in the same frequency channel; at least one master unit and a respective plurality of remote units coupled with the master unit, the at least one master unit coupled with the MIMO signal source and configured for providing RF processing of the MIMO signals and for distributing signals to one or more remote units; at least another master unit and another respective plurality of remote units coupled with the another master unit, the another master unit coupled with the MIMO signal and configured for providing RF processing of the MIMO signals and for distributing signals to one or more remote units; a hybrid coupler coupled to receive the first branch of the MIMO signal and the second branch of the MIMO signal on respective first and second input ports and configured to provide output signals on first and second output ports, the output signal on the first output port including at least a portion of the first branch of the MIMO signal and at least a portion of the second branch of the MIMO signal that is phase shifted orthogonally in relation to the respective second branch of the MIMO signal and the output signal on the second output port including at least a portion of the second branch of the MIMO signal and at least a portion of the first branch of the MIMO signal that is phase shifted orthogonally in relation to the respective first branch of the MIMO signal; a first plurality of remote units with each remote unit configured for communicating the output signal of the first output port of the hybrid coupler but not the output signal from the second output port from a single antenna coupled with a respective remote unit, the output signal of the first output port including portions of both the first and second branches of the MIMO signal; a second plurality of remote units with each remote unit configured for communicating the output signal of the second output port of the hybrid coupler but not the output signal of the first output port from a single antenna coupled with a respective remote unit, the output signal of the second output port including portions of both the first and second branches of the MIMO signal that are different from the output signal of the first output port; the system configured for communicating both the output signal of the first output port and the output signal of the second output port through the different plurality of remote units with respective single antennas to be used by a device for providing MIMO communications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a source of a multiple-input and multiple-output (MIMO) signal configured to output a first branch of a MIMO signal and at least a second branch of the MIMO signal; at least one master unit communicating with the MIMO signal source and configured to receive the first branch of the MIMO signal and second branch of the MIMO signal from the MIMO signal source; at least one remote unit communicating with the master unit and configured to receive the first branch of the MIMO signal and second branch of the MIMO signal from the master unit; a plurality of antennas coupled with the remote unit for receiving signals from the remote unit for transmission from the remote unit; a hybrid coupler coupled between the remote unit and antennas and configured to receive the first branch of the MIMO signal and the second branch of the MIMO signal from the remote unit on respective first and second ports and to provide an output signal on a first output port that includes both of at least a portion of the first branch of the MIMO signal and at least a portion of the second branch of the MIMO signal that is phase shifted orthogonally in relation to the respective second branch of the MIMO signal and an output signal on a second output port that includes both of at least a portion of the second branch of the MIMO signal and at least a portion of the first branch of the MIMO signal that is phase shifted orthogonally in relation to the respective first branch of the MIMO signal; at least one antenna coupled with the first output port of the hybrid coupler for transmitting an output signal from the first output port that includes portions of both the first and second branches of the MIMO signal; at least one antenna coupled with the second output port of the hybrid coupler for transmitting an output signal from the second output port that includes portions of both the first and second branches of the MIMO signal. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification