System and method for improving the robustness of spatial...

Details System and method for improving the robustness of spatial... System and method for improving the robustness of spatial...

2007-04-02

2008-11-11

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C455S132000

Reexamination Certificate

active

07450673

ABSTRACT:
The present invention discloses a base transceiver station (BTS) equipped with a plurality of antennas for improving the robustness of spatial division multiple access via nullng. The BTS comprises of a first matrix module receiving a plurality of signals from one or more customer premises equipments (CPEs) through the plurality of antennas and producing correspondingly a first plurality of covariance matrices representing the plurality of signals, a second matrix module receiving the first plurality of covariance matrices and generating correspondingly a set of derivative spatial signature matrices representing the CPEs respectively, a third matrix module receiving the derivative spatial signature matrices and producing correspondingly a second plurality of covariance matrices representing interferences of the CPEs, and an eigenvector module generating a plurality of beamforming vectors for the CPEs from the plurality of derivative spatial signature matrices and the second plurality of covariance matrices.

REFERENCES:
patent: 6927728 (2005-08-01), Vook et al.
patent: 7068977 (2006-06-01), Yang et al.
patent: 7151755 (2006-12-01), Xu
patent: 2006/0292990 (2006-12-01), Karabinis et al.
patent: 2008/0102898 (2008-05-01), Na et al.

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