Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1992-07-28
1993-06-08
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342378, G01S 316
Patent
active
052183599
ABSTRACT:
An adaptive array antenna having a plurality of antenna elements (1-1 through 1-N), related weight circuits (4-1 through 4-N) for weighting amplitude and phase of receive signal by each antenna element, and a combiner (5) for combining weighed signals, has a plurality of antenna beams at the same time by determining weights of said weight circuits, so that a plurality of receive signals due to multipath transmission are received for obtaining high receive level while avoiding multipath interference. Receive signals are converted to digital form, which is stored in a memory (3) for calculation, in which it is first determined whether a receive signal in each beam direction exists or not, selecting at least one direction beam in which receive signal in that direction beam has less mutual delay time from reference signal in reference direction beam than a predetermined delay time, adjusting phase of all the selected direction beams which have selected receive signal so that receive phase of all the selected direction beams are in phase, and determining weights of said weight circuit so that the antenna has a plurality of direction beams simultaneously for the selected receive signals.
REFERENCES:
patent: H374 (1987-11-01), Abo-Zena et al.
patent: 4017859 (1977-04-01), Medwin
patent: 4577193 (1986-03-01), Kiuchi et al.
IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-33, No. 4, Aug. 1985.
Issing Gregory C.
Kokusai Denshin Denwa Co. Ltd.
LandOfFree
Adaptive array antenna system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adaptive array antenna system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive array antenna system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1945256