Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2008-02-01
2009-10-27
Phan, Dao L (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S372000, C342S373000
Reexamination Certificate
active
07609206
ABSTRACT:
A system and method of enabling digital beamforming (DBF) for use with RF receiver systems with a multi-element array antenna having short repetitive synchronizaton sequences in a noise and/or jamming environment. The method includes the following steps: a) receiving repetitive synchronization RF signals utilizing a multi-element array antenna, each of the repetitive synchronization RF signals includes an ideal known synchronization sequence, the ideal known synchronization sequence is denoted as ydand a length of the ideal known synchronization sequence is denoted as Nd; b) calculating a sequence of magnitudes and phases for each element of the multi-element array antenna corresponding to each of the ideal known synchronization sequences in the received synchronization RF signals, the sequence of the magnitudes and the phases comprises an array of N elements and is denoted as x, wherein the phases are also referred to as absolute phases; c) calculating a relative phase for each element in the sequence of the magnitudes and the absolute phases by referencing the absolute phases of all elements in the array x of N elements to a phase of a single element in the array x of N elements; d) converting the array x of N elements with the magnitudes and the absolute phases into an array of N elements with the magnitudes and the relative phases by replacing each of the absolute phases in the array x of N elements with the calculated relative phase for each element, the array of N elements with the magnitudes and the relative phases is denoted as xr; e) calculating a relative cross correlation vector for each element of the multi-element array antenna utilizing xrand yd, the relative cross correlation vector is denoted as rxd, where rxd=E{xryd*} and * is a complex conjugate; and, f) generating a relative cross correlation vector estimate by filtering rxd, for use with DBF techniques.
REFERENCES:
patent: 6556809 (2003-04-01), Gross
patent: 7286800 (2007-10-01), Maruta
patent: 7289580 (2007-10-01), Pladdy
patent: 7305054 (2007-12-01), Talwar
Jensen Dana J.
Zogg Scott J.
Barbieri Daniel M.
Phan Dao L
Rockwell Collins, Inc.
LandOfFree
Enabling digital beamforming techniques for RF systems... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enabling digital beamforming techniques for RF systems..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enabling digital beamforming techniques for RF systems... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4099025