Interference cancellation scheme using constellation diagram
AssigneeSamsung Electronics Co., Ltd.
InventorsHeun-Chul Lee, Jong-Han Lim
Life of this patent
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Abstract
Provided is an interference cancellation method by a User Equipment (UE) in a cellular communication system. The method includes receiving a signal including a desired signal and an interference signal from at least one base station; determining a universal constellation diagram based on at least one of a transmission parameter of the desired signal and a transmission parameter of the interference signal; blindly detecting an additional transmission parameter of the interference signal using the determined universal constellation diagram; and cancelling the interference signal from the received signal using the detected additional transmission parameter.
Claims32
A method for canceling interference by a User Equipment (UE) in a cellular communication system, the method comprising:
- receiving a signal including a desired signal and an interference signal from at least one base station;
- generating at least one predefined constellation diagram;
- determining a universal constellation diagram from the at least one predefined constellation diagram based on at least one of a transmission parameter of the desired signal and a transmission parameter of the interference signal;
- blindly detecting an additional transmission parameter of the interference signal using the determined universal constellation diagram;
- and
- cancelling the interference signal from the received signal using the detected additional transmission parameter,
- wherein the at least one predefined constellation diagram is generated by:
- selecting at least one constellation point from constellation points on one or more constellation diagrams;
- and
- distorting or deviating the selected at least one constellation point in view of a Euclidean distance.
A User Equipment (UE) device for performing interference cancellation in a cellular communication system, the UE device comprising:
- a transceiver configured to receive a signal including a desired signal and an interference signal from at least one base station;
- and
- a controller configured to:
- generate at least one predefined constellation diagram;
- determine a universal constellation diagram from the at least one predefined constellation diagram based on at least one of a transmission parameter of the desired signal and a transmission parameter of the interference signal;
- blindly detect an additional transmission parameter of the interference signal using the determined universal constellation diagram;
- and
- cancel the interference signal from the received signal using the detected additional transmission parameter,
- wherein the at least one predefined constellation diagram is generated by:
- selecting at least one constellation point from constellation points on one or more constellation diagrams;
- and
- distorting or deviating the selected at least one constellation point in view of a Euclidean distance.
A method for receiving a signal by a User Equipment (UE) in a cellular communication system, the method comprising:
- receiving, from a base station, a spatially-multiplexed signal including a first layer data stream and a second layer data stream;
- generating at least one predefined constellation diagram;
- determining a universal constellation diagram to be used as a constellation diagram of the second layer data stream from the at least one predefined constellation diagram based on a transmission parameter of the second layer data stream;
- and
- detecting the first layer data stream using the constellation diagram of the second layer data stream,
- wherein the at least one predefined constellation diagram is generated by:
- selecting at least one constellation point from constellation points on one or more constellation diagrams;
- and
- distorting or deviating the selected at least one constellation point in view of a Euclidean distance.
A User Equipment (UE) device for receiving a signal in a cellular communication system, the UE device comprising:
- a transceiver which receives a spatially-multiplexed signal, including a first layer data stream and a second layer data stream, from a base station;
- and
- a controller configured to:
- generate at least one predefined constellation diagram;
- determine a universal constellation diagram to be used as a constellation diagram of the second layer data stream, from the at least one predefined constellation diagram based on a transmission parameter of the second layer data stream;
- and
- detect the first layer data stream using the constellation diagram of the second layer data stream,
- wherein the at least one predefined constellation diagram is generated by:
- selecting at least one constellation point from constellation points on one or more constellation diagrams;
- and
- distorting or deviating the selected at least one constellation point in view of a Euclidean distance.
Dependencies are inferred from the claim text.