The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
ESPAR(Electronicly steerable Passive Array Radiator) 안테나는 다양한 가변 리액턴스를 갖는 기생 요소 기반 단일 포트 출력 안테나의 한 종류입니다. 아날로그 공중 빔포밍을 수행하며 수동 소자의 신호는 전혀 관찰되지 않습니다. 이 사실과 더 중요한 사실(조정 가능한 리액턴스로부터 안테나 출력의 비선형 의존성)은 문제를 실질적으로 새로운 것으로 만들고 기존의 적응형 어레이 빔형성 기술로는 해결할 수 없습니다. 가변 매개변수에 의한 비선형 공간 필터로서 ESPAR 안테나의 적응형 빔 형성을 위해 확률론적 근사 이론에 기초한 새로운 접근 방식이 제안되어 빔과 널을 모두 형성합니다. 출력 SINR, 안정성, 수렴, 오조정, 잡음 효과, 편향 항 등에 대해 두 가지 학습률 일정을 검토하고 최적의 학습률 일정을 제안했습니다. 추가 개발이 추적되었습니다. 우리의 이론적 연구, 시뮬레이션 결과 및 성능 분석에 따르면 ESPAR 안테나는 효과적으로 제어할 수 있고 모바일 단말기에 사용할 수 있는 강력한 잠재력을 갖고 있으며 매우 전망이 좋은 것으로 보입니다.
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Blagovest SHISHKOV, Jun CHENG, Takashi OHIRA, "Adaptive Control Algorithm of ESPAR Antenna Based on Stochastic Approximation Theory" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 4, pp. 802-811, April 2002, doi: .
Abstract: The electronically steerable passive array radiator (ESPAR) antenna is one kind of the parasitic elements based single-port output antennas with several variable reactances. It performs analog aerial beamforming and none of the signals on its passive elements can be observed. This fact and one that is more important--the nonlinear dependence of the output of the antenna from adjustable reactances--makes the problem substantially new and not resolvable by means of conventional adaptive array beamforming techniques. A novel approach based on stochastic approximation theory is proposed for the adaptive beamforming of the ESPAR antenna as a nonlinear spatial filter by variable parameters, thus forming both beam and nulls. Two learning rate schedule were examined about output SINR, stability, convergence, misadjustment, noise effect, bias term, etc., and the optimal one was proposed. Further development was traced. Our theoretic study, simulation results and performance analysis show that the ESPAR antenna can be controlled effectively, has strong potential for use in mobile terminals and seems to be very perspective.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_4_802/_p
부
@ARTICLE{e85-b_4_802,
author={Blagovest SHISHKOV, Jun CHENG, Takashi OHIRA, },
journal={IEICE TRANSACTIONS on Communications},
title={Adaptive Control Algorithm of ESPAR Antenna Based on Stochastic Approximation Theory},
year={2002},
volume={E85-B},
number={4},
pages={802-811},
abstract={The electronically steerable passive array radiator (ESPAR) antenna is one kind of the parasitic elements based single-port output antennas with several variable reactances. It performs analog aerial beamforming and none of the signals on its passive elements can be observed. This fact and one that is more important--the nonlinear dependence of the output of the antenna from adjustable reactances--makes the problem substantially new and not resolvable by means of conventional adaptive array beamforming techniques. A novel approach based on stochastic approximation theory is proposed for the adaptive beamforming of the ESPAR antenna as a nonlinear spatial filter by variable parameters, thus forming both beam and nulls. Two learning rate schedule were examined about output SINR, stability, convergence, misadjustment, noise effect, bias term, etc., and the optimal one was proposed. Further development was traced. Our theoretic study, simulation results and performance analysis show that the ESPAR antenna can be controlled effectively, has strong potential for use in mobile terminals and seems to be very perspective.},
keywords={},
doi={},
ISSN={},
month={April},}
부
TY - JOUR
TI - Adaptive Control Algorithm of ESPAR Antenna Based on Stochastic Approximation Theory
T2 - IEICE TRANSACTIONS on Communications
SP - 802
EP - 811
AU - Blagovest SHISHKOV
AU - Jun CHENG
AU - Takashi OHIRA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2002
AB - The electronically steerable passive array radiator (ESPAR) antenna is one kind of the parasitic elements based single-port output antennas with several variable reactances. It performs analog aerial beamforming and none of the signals on its passive elements can be observed. This fact and one that is more important--the nonlinear dependence of the output of the antenna from adjustable reactances--makes the problem substantially new and not resolvable by means of conventional adaptive array beamforming techniques. A novel approach based on stochastic approximation theory is proposed for the adaptive beamforming of the ESPAR antenna as a nonlinear spatial filter by variable parameters, thus forming both beam and nulls. Two learning rate schedule were examined about output SINR, stability, convergence, misadjustment, noise effect, bias term, etc., and the optimal one was proposed. Further development was traced. Our theoretic study, simulation results and performance analysis show that the ESPAR antenna can be controlled effectively, has strong potential for use in mobile terminals and seems to be very perspective.
ER -