Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments

Huu Phu BUI; Yasutaka OGAWA; Takeo OHGANE; Toshihiko NISHIMURA

doi:10.1093/ietcom/e89-b.11.3083

Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments

Huu Phu BUI, Yasutaka OGAWA, Takeo OHGANE, Toshihiko NISHIMURA

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Multiple-input multiple-output (MIMO) systems using eigenbeam space division multiplexing (E-SDM) perform well and have increased capacities compared with those using conventional space division multiplexing (SDM). However, channel state information (CSI) is required at a transmitter, and the performance of E-SDM systems depends much on the accuracy of the CSI at a transmitter and a receiver. In time-varying fading environments, the channel change between the transmit weight determination time and the actual data transmission time causes the system performance to degrade. To compensate for the channel error, a linear extrapolation method has been proposed for a time division duplexing system. Unfortunately, the system performance still deteriorates as the maximum Doppler frequency increases. Here, two new techniques of channel extrapolation are proposed. One is second order extrapolation, and the other is exponential extrapolation. Also, we propose maximum Doppler frequency estimation methods for exponential extrapolation. Simulation results for 4tx 4rx MIMO systems showed that using the proposed techniques, E-SDM system performs better in a higher Doppler frequency region.

Publication: IEICE TRANSACTIONS on Communications Vol.E89-B No.11 pp.3083-3092

Publication Date: 2006/11/01

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Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e89-b.11.3083

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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Huu Phu BUI, Yasutaka OGAWA, Takeo OHGANE, Toshihiko NISHIMURA, "Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments" in IEICE TRANSACTIONS on Communications, vol. E89-B, no. 11, pp. 3083-3092, November 2006, doi: 10.1093/ietcom/e89-b.11.3083.
Abstract: Multiple-input multiple-output (MIMO) systems using eigenbeam space division multiplexing (E-SDM) perform well and have increased capacities compared with those using conventional space division multiplexing (SDM). However, channel state information (CSI) is required at a transmitter, and the performance of E-SDM systems depends much on the accuracy of the CSI at a transmitter and a receiver. In time-varying fading environments, the channel change between the transmit weight determination time and the actual data transmission time causes the system performance to degrade. To compensate for the channel error, a linear extrapolation method has been proposed for a time division duplexing system. Unfortunately, the system performance still deteriorates as the maximum Doppler frequency increases. Here, two new techniques of channel extrapolation are proposed. One is second order extrapolation, and the other is exponential extrapolation. Also, we propose maximum Doppler frequency estimation methods for exponential extrapolation. Simulation results for 4tx 4rx MIMO systems showed that using the proposed techniques, E-SDM system performs better in a higher Doppler frequency region.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.11.3083/_p

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@ARTICLE{e89-b_11_3083,
author={Huu Phu BUI, Yasutaka OGAWA, Takeo OHGANE, Toshihiko NISHIMURA, },
journal={IEICE TRANSACTIONS on Communications},
title={Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments},
year={2006},
volume={E89-B},
number={11},
pages={3083-3092},
abstract={Multiple-input multiple-output (MIMO) systems using eigenbeam space division multiplexing (E-SDM) perform well and have increased capacities compared with those using conventional space division multiplexing (SDM). However, channel state information (CSI) is required at a transmitter, and the performance of E-SDM systems depends much on the accuracy of the CSI at a transmitter and a receiver. In time-varying fading environments, the channel change between the transmit weight determination time and the actual data transmission time causes the system performance to degrade. To compensate for the channel error, a linear extrapolation method has been proposed for a time division duplexing system. Unfortunately, the system performance still deteriorates as the maximum Doppler frequency increases. Here, two new techniques of channel extrapolation are proposed. One is second order extrapolation, and the other is exponential extrapolation. Also, we propose maximum Doppler frequency estimation methods for exponential extrapolation. Simulation results for 4tx 4rx MIMO systems showed that using the proposed techniques, E-SDM system performs better in a higher Doppler frequency region.},
keywords={},
doi={10.1093/ietcom/e89-b.11.3083},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments
T2 - IEICE TRANSACTIONS on Communications
SP - 3083
EP - 3092
AU - Huu Phu BUI
AU - Yasutaka OGAWA
AU - Takeo OHGANE
AU - Toshihiko NISHIMURA
PY - 2006
DO - 10.1093/ietcom/e89-b.11.3083
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2006
AB - Multiple-input multiple-output (MIMO) systems using eigenbeam space division multiplexing (E-SDM) perform well and have increased capacities compared with those using conventional space division multiplexing (SDM). However, channel state information (CSI) is required at a transmitter, and the performance of E-SDM systems depends much on the accuracy of the CSI at a transmitter and a receiver. In time-varying fading environments, the channel change between the transmit weight determination time and the actual data transmission time causes the system performance to degrade. To compensate for the channel error, a linear extrapolation method has been proposed for a time division duplexing system. Unfortunately, the system performance still deteriorates as the maximum Doppler frequency increases. Here, two new techniques of channel extrapolation are proposed. One is second order extrapolation, and the other is exponential extrapolation. Also, we propose maximum Doppler frequency estimation methods for exponential extrapolation. Simulation results for 4tx 4rx MIMO systems showed that using the proposed techniques, E-SDM system performs better in a higher Doppler frequency region.
ER -