Method and system for steering antenna beam

Details Method and system for steering antenna beam Method and system for steering antenna beam

2005-12-08

2009-11-03

Nguyen, Duc (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S083000, C343S729000, C343S751000, C343S853000, C343S893000, C342S403000, C342S423000, C342S434000, C342S447000

Reexamination Certificate

active

07613482

ABSTRACT:
A hybrid wireless network system is disclosed. The hybrid wireless network system includes an antenna array, an analog subsystem, and a digital subsystem. The antenna array at least includes two antenna elements. In the case of using multiple antenna elements to extend link range and coverage, a coarse-fine method is included for antenna elements selection. The analog subsystem calculates a difference signal and a sum signal based on the two RF signals. The analog subsystem includes step leveling devices. The digital subsystem estimates a direction-of-arrival (DOA) based on the sum signal and the difference signal. The step-leveling devices receive weights from the digital subsystem, in form of a feedback control, to apply the weights on the two RF signals respectively. The digital subsystem repetitively calculates new weights to update a beam pattern formed by the two RF signals until the DOA approaches null.

REFERENCES:
patent: 6628969 (2003-09-01), Rilling
patent: 2002/0147032 (2002-10-01), Yoon et al.
patent: 2003/0058155 (2003-03-01), Landt
patent: 2003/0184473 (2003-10-01), Yu
patent: 2004/0046695 (2004-03-01), Brothers et al.

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