Beam-forming apparatus and method using a spatial...

Details Beam-forming apparatus and method using a spatial... Beam-forming apparatus and method using a spatial...

2006-04-07

2008-03-11

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S154000, C342S373000

Reexamination Certificate

active

07342535

ABSTRACT:
A beam-forming apparatus and method for improving system performance using a spatial interpolation and at least one Angle of Arrival (AoA) in a system based on regular spatial sampling is provided. The AoA is estimated using a carrier-to-interference ratio. Beam-forming angles are distributed and steered in a predefined scheme such that an identical process is applied in all directions. According to this steering, a linear system model is computed based on regular spatial sampling using regular spatial separation at beam angles. Beam-forming performance is improved by compensating for a difference between adaptive and sector-type arrays. Only the steps of computing a spatial interpolation and determining an angle range for beam-forming using at least one AoA are added. The precision of estimating an AoA and the precision of beam-forming increase without an additional antenna. Because the system is simpler than that of an adaptive beam-forming system, significant gain is obtained.

REFERENCES:
patent: 7148845 (2006-12-01), Rooyen et al.
patent: 2002/0090978 (2002-07-01), Petrus et al.
patent: 2003/0206132 (2003-11-01), Phelan et al.
patent: 2005/0259006 (2005-11-01), Kim et al.
patent: 2005/0271016 (2005-12-01), Kim et al.

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