Blind signal separation using I and Q components
AssigneeInterDigital Technology Corporation
InventorSteven J. Goldberg
Life of this patent
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Abstract
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for receiving at least N different summations of the M source signals. A respective in-phase and quadrature module is connected downstream to each antenna element for separating each one of the N different summations of the M source signals received thereby into an in-phase and quadrature component set. A blind signal separation processor forms a mixing matrix comprising at least 2N different summations of the M source signals, with each in-phase and quadrature component set providing 2 inputs into the mixing matrix. The mixing matrix has a rank equal up to 2N. The desired source signals are separated from the mixing matrix by the blind signal separation processor.
Claims33
A communications device for separating source signals provided by M signal sources, the communications device comprising:
- an antenna array comprising N antenna elements for receiving at least N different summations of the M source signals;
- a respective in-phase and quadrature module connected downstream to each antenna element for separating each one of the N different summations of the M source signals received thereby into an in-phase and quadrature component set;
- a receiver assembly connected downstream to each in-phase and quadrature module for receiving the at least N in-phase and quadrature component sets for the at least N different summations of the M source signals;
- and
- a blind signal separation processor connected downstream to said receiver assembly for forming a mixing matrix comprising at least 2N different summations of the M source signals, with each in-phase and quadrature component set providing 2 inputs into the mixing matrix, the mixing matrix having a rank equal up to 2N, said blind signal separation processor for separating desired source signals from the mixing matrix.
A method for operating a communications device for separating source signals provided by M signal sources, the communications device comprising and antenna array, in-phase and quadrature modules connected downstream to the antenna array, a receiver assembly connected downstream to the in-phase and quadrature modules, and a blind signal separation processor connected downstream to the receiver assembly, the method comprising:
- receiving at the antenna array at least N different summations of the M source signals, the antenna array comprising N antenna elements;
- separating each one of the N different summations of the M source signals into an in-phase and quadrature component set using a respective in-phase and quadrature module connected downstream to an antenna element;
- providing the at least N in-phase and quadrature component sets for the at least N different summations of the M source signals to the receiver assembly;
- and
- processing by the blind signal separation processor the at least N in-phase and quadrature component sets for the at least N different summations of the M source signals, the processing comprising
- forming a mixing matrix comprising at least 2N different summations of the M source signals, with each in-phase and quadrature component set providing 2 inputs into the mixing matrix, the mixing matrix having a rank equal up to 2N, and
- separating desired source signals from the mixing matrix.
Dependencies are inferred from the claim text.