Invention Grant
- Patent Title: System and method for improving the robustness of spatial division multiple access via nulling
- Patent Title (中): 通过归零改善空分多址的鲁棒性的系统和方法
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Application No.: US11695575Application Date: 2007-04-02
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Publication No.: US07450673B2Publication Date: 2008-11-11
- Inventor: Hang Jin , Li Guo
- Applicant: Hang Jin , Li Guo
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Edell, Shapiro & Finnan, LLC
- Main IPC: H04L1/02
- IPC: H04L1/02 ; H04B7/08

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.
Public/Granted literature
- US20080039067A1 System and Method for Improving the Robustness of Spatial Division Multiple Access Via Nulling Public/Granted day:2008-02-14
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