Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1998-02-09
1998-12-29
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342380, 342442, G01S 316, G01S 328
Patent
active
058546120
ABSTRACT:
A method of controlling an array antenna having a plurality of antenna elements for providing antenna output signals by receiving TDMA burst signals. The method includes a step of estimating a DOA of incident signal based upon the antenna output signals, a step of calculating weights with reference to the estimated DOA, a step of multiplying the antenna output signals by the calculated weights, respectively, and a step of summing the multiplied antenna output signals. The estimating step includes a first step of calculating a phase difference between the output signals of the two antenna elements during burst, a second step of calculating a phase difference between the output signals of the two antenna elements during an interval of bursts, and a third step of calculating a difference between the calculated phase differences.
REFERENCES:
patent: 5274386 (1993-12-01), Pellon
patent: 5321410 (1994-06-01), Hipp et al.
"Developments and Prospects of Adaptive Antenna Theories", Ogawa et al, Trans. of IEICE, B-II vol. J75-B-II, No. 11, Nov. 1992, pp. 721 -732.
"High-Resolution Techniques in Signal Processing Antennas", Ogawa et al, IEICE Trans. Commun., vol. E78-B, No. 11, Nov. 1995, pp. 1435 -1441.
Kamiya Yukihiro
Kobayashi Hideo
Nomoto Shinichi
Blum Theodore M.
Kokusai Denshin Denwa Co. Ltd.
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