Communications: directive radio wave systems and devices (e.g. – Determining direction
Reexamination Certificate
2007-03-27
2007-03-27
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining direction
C342S082000, C342S089000, C342S165000, C342S173000, C342S174000, C342S175000, C342S195000, C342S417000, C367S087000, C367S099000, C356S138000, C356S140000, C356S141200
Reexamination Certificate
active
11018985
ABSTRACT:
An apparatus for estimating direction of arrival of signal is provided that has excellent performance in terms of angular resolution and the number of signals that can be identified. In an array sensor comprising a plurality of sensor elements, the two outermost sensor elements are alternately selected by a switch for use as a transmitting sensor, and the other sensor elements are selected in time division fashion as receiving sensors. With this arrangement, the effective aperture is increased to about twice the physical aperture, to improve angular resolution in a direction-of-arrival estimator.
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Solomon I S D et al., Receiver Array Calibration Using Disparate Sources, IEEE Transactions on Antennas and Propagation, IEEE Inc. New York, US vol. 47, No. 3, Mar. 1999, pp. 496-504, XP000830210 ISSN: 0018-926X *the whole document*.
Partial European Search Report dated Jan. 2, 2006.
Fujitsu Limited
Gregory Bernarr E.
Katten Muchin & Rosenman LLP
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