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
Kertas kerja ini memperkenalkan aplikasi baharu teori kawalan adaptif kepada kawalan kuasa dalam sistem selular capaian berbilang pembahagian kod (CDMA) yang beroperasi melalui saluran radio mudah alih yang pudar. Algoritma kawalan kuasa maklum balas konvensional membenarkan stesen pangkalan menghantar arahan kuasa sama ada untuk menaikkan atau menurunkan kuasa penghantaran setiap pengguna mengikut dasar kawalan seperti bang-bang. Dalam makalah ini, kami membentangkan metodologi kawalan kuasa varians minimum adaptif yang boleh ditunjukkan untuk meningkatkan prestasi kawalan kuasa secara konsisten terhadap sifat rawak kesan hampir-jauh, membayangi dan cepat berubah-ubah pudar. Dua pelaksanaan penyesuaian dipertimbangkan: kawalan langsung dan tidak langsung. Dalam kawalan penyesuaian tidak langsung, pengawal varians minimum digabungkan dengan algoritma anggaran terhad untuk memastikan kestabilan model keuntungan pautan. Dalam kawalan adaptif langsung, parameter pengawal diperoleh terus daripada algoritma anggaran piawai. Simulasi kami telah menunjukkan bahawa skim kawalan kuasa varians minimum adaptif yang dicadangkan memberikan varians ralat yang jauh lebih kecil daripada skim kawalan bang-bang langkah tetap konvensional dan seterusnya kapasiti saluran songsang sistem CDMA boleh meningkat dengan ketara.
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Salinan
Tae-Woong YOON, Hyun-Jung KIM, Woonkyung M. KIM, Chung Gu KANG, "Adaptive Minimum-Variance Closed-Loop Power Control in CDMA Cellular Systems" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 1, pp. 210-220, January 2002, doi: .
Abstract: This paper introduces a new application of adaptive control theory to power control in a code division multiple access (CDMA) cellular system operating over mobile fading radio channels. Conventional feedback power control algorithms allow the base station to send a power command to either raise or lower each user's transmission power according to a bang-bang-like control policy. In this paper, we present an adaptive minimum-variance power control methodology which can be shown to improve power control performance consistently against a random nature of the near-far effect, shadowing and fast varying fading. Two adaptive implementations are considered: direct and indirect control. In the indirect adaptive control, a minimum-variance controller is combined with a constrained estimation algorithm to ensure the stability of a link gain model. In the direct adaptive control, the controller parameters are obtained directly from a standard estimation algorithm. Our simulations have shown that the proposed adaptive minimum-variance power control schemes provide much smaller error variance than the conventional fixed-step bang-bang control scheme and consequently the reverse channel capacity of the CDMA system can be significantly increased.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_1_210/_p
Salinan
@ARTICLE{e85-b_1_210,
author={Tae-Woong YOON, Hyun-Jung KIM, Woonkyung M. KIM, Chung Gu KANG, },
journal={IEICE TRANSACTIONS on Communications},
title={Adaptive Minimum-Variance Closed-Loop Power Control in CDMA Cellular Systems},
year={2002},
volume={E85-B},
number={1},
pages={210-220},
abstract={This paper introduces a new application of adaptive control theory to power control in a code division multiple access (CDMA) cellular system operating over mobile fading radio channels. Conventional feedback power control algorithms allow the base station to send a power command to either raise or lower each user's transmission power according to a bang-bang-like control policy. In this paper, we present an adaptive minimum-variance power control methodology which can be shown to improve power control performance consistently against a random nature of the near-far effect, shadowing and fast varying fading. Two adaptive implementations are considered: direct and indirect control. In the indirect adaptive control, a minimum-variance controller is combined with a constrained estimation algorithm to ensure the stability of a link gain model. In the direct adaptive control, the controller parameters are obtained directly from a standard estimation algorithm. Our simulations have shown that the proposed adaptive minimum-variance power control schemes provide much smaller error variance than the conventional fixed-step bang-bang control scheme and consequently the reverse channel capacity of the CDMA system can be significantly increased.},
keywords={},
doi={},
ISSN={},
month={January},}
Salinan
TY - JOUR
TI - Adaptive Minimum-Variance Closed-Loop Power Control in CDMA Cellular Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 210
EP - 220
AU - Tae-Woong YOON
AU - Hyun-Jung KIM
AU - Woonkyung M. KIM
AU - Chung Gu KANG
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2002
AB - This paper introduces a new application of adaptive control theory to power control in a code division multiple access (CDMA) cellular system operating over mobile fading radio channels. Conventional feedback power control algorithms allow the base station to send a power command to either raise or lower each user's transmission power according to a bang-bang-like control policy. In this paper, we present an adaptive minimum-variance power control methodology which can be shown to improve power control performance consistently against a random nature of the near-far effect, shadowing and fast varying fading. Two adaptive implementations are considered: direct and indirect control. In the indirect adaptive control, a minimum-variance controller is combined with a constrained estimation algorithm to ensure the stability of a link gain model. In the direct adaptive control, the controller parameters are obtained directly from a standard estimation algorithm. Our simulations have shown that the proposed adaptive minimum-variance power control schemes provide much smaller error variance than the conventional fixed-step bang-bang control scheme and consequently the reverse channel capacity of the CDMA system can be significantly increased.
ER -