DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS
First Claim
1. A system comprising:
- 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, 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 and configured 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 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 plurality of remote units configured for communicating the output signal of the first output port of the hybrid coupler;
another plurality of remote units configured for communicating the output signal of the second 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 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.
137 Citations
20 Claims
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1. A system comprising:
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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, 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 and configured 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 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 plurality of remote units configured for communicating the output signal of the first output port of the hybrid coupler; another plurality of remote units configured for communicating the output signal of the second 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 to be used by a device for providing MIMO communications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 18, 19, 20)
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12. A system comprising:
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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 communicating with the MIMO base station and configured to receive the first signal and second signal from the base station; at least one remote unit communicating with the master unit and configured to receive the first signal and second signal from the master unit; at least one antenna coupled with the remote unit for receiving signals from the remote unit; a hybrid coupler coupled between the remote unit and antenna and configured to receive the first signal and the second signal 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 including at least a portion of the first signal and at least a portion of the second signal; the antenna coupled with the output port. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification