Blind signal separation using spreading codes
AssigneeInterDigital Technology Corporation
InventorsIvica Kostanic, Steven J. Goldberg
Life of this patent
Estimating the term…
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 code despreader is connected to the N antenna elements for decoding the at least N different summations of the M source signals. Each one of the N different summations includes k codes for providing k different summations of the M source signals associated therewith. A blind signal separation processor forms a mixing matrix comprising at least kN different summations of the M source signals, and separates desired source signals from the mixing matrix. The mixing matrix has a rank equal up to kN.
Claims30
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 code despreader connected to said N antenna elements for decoding the at least N different summations of the M source signals, each one of the N different summations including k codes for providing k different summations of the M source signals associated therewith;
- a receiver assembly connected to said code despreader for receiving at least kN different summations of the M source signals;
- and
- a blind signal separation processor connected to said receiver assembly for forming a mixing matrix comprising the at least kN different summations of the M source signals, the mixing matrix having a rank equal up to kN, 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 an antenna array, a code decoder connected to the antenna array, a receiver assembly connected to the code decoder, and a blind signal separation processor connected 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;
- decoding by the decoder the at least N different summations of the M source signals, each one of the N different summations including k codes for providing k different summations of the M source signals associated therewith;
- providing the at least kN different summations of the M source signals to the receiver assembly;
- and
- processing by the blind signal separation processor the at least kN different summations of the M source signals, the processing comprising
- forming a mixing matrix comprising the at least kN different summations of the M source signals, the mixing matrix having a rank equal up to kN, and
- separating desired source signals from the mixing matrix.
Dependencies are inferred from the claim text.