Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Reexamination Certificate
2006-06-06
2006-06-06
Vannucci, James (Department: 2828)
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
C455S522000, C375S353000
Reexamination Certificate
active
07057573
ABSTRACT:
Based on a received signal y(t) received by a radiating element of an array antenna including the single radiating element and a plurality of parasitic elements, an adaptive controller calculates and sets a reactance value of a variable reactance element for directing a main beam of the array antenna in a direction of a desired wave and directing nulls in directions of interference waves so that a value of an objective function expressed by only the received signal y(t) becomes either one of the maximum and the minimum by using an iterative numerical solution of a nonlinear programming method.
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A. Ramesh et al., “SNR Estimation in Generalized Fading Channels and its Application to Turbo Decoding” Proceeding of. IEEE ICC 2001, pp. 1094-1098, Helsinki, Jun., 2001.
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Takashi Ohira et al., “Electronically Steerable Passive Array Radiator Antennas for Low-Cost Analog Adaptive Beamforming”, 2000 IEEE International Conference on Phased Array System & Technology pp. 101-104, Dana point, California, May 21-25, 2000.
Takashi Ohira, “Pseudo In-Phase Combining and Steepest Gradient Iteration for Quick Reactance Optimization in ESPAR Antenna Beam Steering”, Technical Report of the Institute of Electronics, Information and Communication Engineers, in Japan, A-P2001-48, pp. 1-6, Jul., 2001 (together with an English Abstract on the first page thereof).
Yukihiro Kamiya et al., “Performance Considerations for the ESPAR Antenna-Statistical Considerations of SINR Characteristics Based on the Random Weight Search”, Technical Japan, A-P 2000-175, SANE2000-156, pp. 17-24, Jan., 2001 (together with an English Abstract on the first page thereof).
Todd A. Summers et al., “SNR Mismatch and Online Estimation in Turbo-Decoding”, IEEE Transaction on Communications, vol. COM-46, No. 4, pp. 421-423, Apr., 1998.
A. Ramesh et al., “SNR Estimation in Generalized Fading Channels and its Application to turbo Decoding” Proceeding of. IEEE ICC 2001, pp. 1094-1098, Helsinki, Jun., 2001.
Kenichi Takizawa et al., “Efficient Estimation Scheme of Channel State Information for Parallel Combinatorial SS Systems (2)”, Proceeding of General National Meeting of The Institute of Electronics, Information and Communication Engineers, in Japan, A-5-6, pp. 188, Mar., 2002 (together with an English translation thereof).
Advanced Telecommuications Research Institute International
Vannucci James
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