Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1999-05-03
2000-06-13
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342377, H01Q 326, H01Q 300
Patent
active
060754842
ABSTRACT:
A direction of arrival (DOA)-aided digital beamforming (DBF) subsystem (300 FIG. 3) is provided for mitigating interference and increasing the frequency reuse factor in communication systems. The DOA-aided DBF subsystem is used to accurately position beams and nulls in at least one antenna beam pattern. By accurately directing beams at desired locations and nulls at undesired locations, the DOA-aided DBF subsystem provides a more efficient processing of antenna beam patterns in communication systems. The DOA-aided DBF subsystem is used in geostationary satellites, non-geostationary satellites, and terrestrial communication devices. The DOA-aided DBF subsystem uses a unique algorithm to determine DOA information that allows more efficient beam management and allows more subscribers to be served, while saving spectrum and power.
REFERENCES:
patent: 4771289 (1988-09-01), Masak
patent: 5144322 (1992-09-01), Gabiel
patent: 5754138 (1998-05-01), Turcotte et al.
An article entitled "Computionally Efficient Angle Estimation For Signals With Known Waveforms" by Jian Li, Bijit Halter, Petre Stoica and Mats Viberg from IEEE Transactions On Signal Processing, vol. 43, No. 9, Sep. 1995.
An article entitled "Direction Of Arrival Estimation Using Parametric Signal Models", by Ariela Zeira and Benjamin Friedlander from IEEE Transactions On Signal Processing, vol. 44, No. 2, Feb. 1996.
Daniel Sam Mordochai
Ma Stephen Chihhung
Bogacz Frank J.
Coleman Sharon K.
Klekotka James E.
Motorola Inc.
Mull Fred H.
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