Experiments by an Adaptive Antenna with a Low Frequency Model

Kozo HASHIMOTO; Yasuyuki ITOH; Koji KOMIYAMA; Kazuaki TAKAO; Iwane KIMURA

Experiments by an Adaptive Antenna with a Low Frequency Model

Kozo HASHIMOTO, Yasuyuki ITOH, Koji KOMIYAMA, Kazuaki TAKAO, Iwane KIMURA

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The authors implemented a directionally-constrained adaptive array system in an audio-frequency range. This system has a good prospect of applications since it does not require a rigorous a priori knowledge of the desired signal. Its algorithm contains matrix calculation, for which some technique has to be devised in implementation. For this, data are sampled and A-D converted so that the necessary processing for feedback control may be done by a microcomputer in digital form. The signal path remains in analog form, which will allow us to extend the system to higher frequency range. The performance of the system is demonstrated through the experiments. Effects of hardware errors are found:
(1) Nulling behavior against the interference is not affected at all by virtue of the feedback control.
(2) A little deviation from the constrained response to the desired signal is perceived.
The behavior against a wideband interference is investigated analytically and experimentally. It was found that the final SIR becomes lower with wider frequency bandwidth.

Publication: IEICE TRANSACTIONS on transactions Vol.E64-E No.4 pp.246-251

Publication Date: 1981/04/25

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Type of Manuscript: PAPER

Category: Antenna and Propagation

Authors

Kozo HASHIMOTO
Yasuyuki ITOH
Koji KOMIYAMA
Kazuaki TAKAO
Iwane KIMURA

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Kozo HASHIMOTO, Yasuyuki ITOH, Koji KOMIYAMA, Kazuaki TAKAO, Iwane KIMURA, "Experiments by an Adaptive Antenna with a Low Frequency Model" in IEICE TRANSACTIONS on transactions, vol. E64-E, no. 4, pp. 246-251, April 1981, doi: .
Abstract: The authors implemented a directionally-constrained adaptive array system in an audio-frequency range. This system has a good prospect of applications since it does not require a rigorous a priori knowledge of the desired signal. Its algorithm contains matrix calculation, for which some technique has to be devised in implementation. For this, data are sampled and A-D converted so that the necessary processing for feedback control may be done by a microcomputer in digital form. The signal path remains in analog form, which will allow us to extend the system to higher frequency range. The performance of the system is demonstrated through the experiments. Effects of hardware errors are found:
(1) Nulling behavior against the interference is not affected at all by virtue of the feedback control.
(2) A little deviation from the constrained response to the desired signal is perceived.
The behavior against a wideband interference is investigated analytically and experimentally. It was found that the final SIR becomes lower with wider frequency bandwidth.
URL: https://globals.ieice.org/en_transactions/transactions/10.1587/e64-e_4_246/_p

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@ARTICLE{e64-e_4_246,
author={Kozo HASHIMOTO, Yasuyuki ITOH, Koji KOMIYAMA, Kazuaki TAKAO, Iwane KIMURA, },
journal={IEICE TRANSACTIONS on transactions},
title={Experiments by an Adaptive Antenna with a Low Frequency Model},
year={1981},
volume={E64-E},
number={4},
pages={246-251},
abstract={The authors implemented a directionally-constrained adaptive array system in an audio-frequency range. This system has a good prospect of applications since it does not require a rigorous a priori knowledge of the desired signal. Its algorithm contains matrix calculation, for which some technique has to be devised in implementation. For this, data are sampled and A-D converted so that the necessary processing for feedback control may be done by a microcomputer in digital form. The signal path remains in analog form, which will allow us to extend the system to higher frequency range. The performance of the system is demonstrated through the experiments. Effects of hardware errors are found:
(1) Nulling behavior against the interference is not affected at all by virtue of the feedback control.
(2) A little deviation from the constrained response to the desired signal is perceived.
The behavior against a wideband interference is investigated analytically and experimentally. It was found that the final SIR becomes lower with wider frequency bandwidth.},
keywords={},
doi={},
ISSN={},
month={April},}

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TY - JOUR
TI - Experiments by an Adaptive Antenna with a Low Frequency Model
T2 - IEICE TRANSACTIONS on transactions
SP - 246
EP - 251
AU - Kozo HASHIMOTO
AU - Yasuyuki ITOH
AU - Koji KOMIYAMA
AU - Kazuaki TAKAO
AU - Iwane KIMURA
PY - 1981
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E64-E
IS - 4
JA - IEICE TRANSACTIONS on transactions
Y1 - April 1981
AB - The authors implemented a directionally-constrained adaptive array system in an audio-frequency range. This system has a good prospect of applications since it does not require a rigorous a priori knowledge of the desired signal. Its algorithm contains matrix calculation, for which some technique has to be devised in implementation. For this, data are sampled and A-D converted so that the necessary processing for feedback control may be done by a microcomputer in digital form. The signal path remains in analog form, which will allow us to extend the system to higher frequency range. The performance of the system is demonstrated through the experiments. Effects of hardware errors are found:
(1) Nulling behavior against the interference is not affected at all by virtue of the feedback control.
(2) A little deviation from the constrained response to the desired signal is perceived.
The behavior against a wideband interference is investigated analytically and experimentally. It was found that the final SIR becomes lower with wider frequency bandwidth.
ER -