IEICE TRANSACTIONS on Fundamentals
Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors
Summary :
In this paper, we evaluate the performance of asymmetric Time Division Duplex (TDD) system that employs Adaptive Modulation and Coding (AMC) and Hybrid ARQ, with consideration of the effect of control delays in TDD. Channel reciprocity characteristic in TDD allows utilization of open loop channel estimation to choose appropriate modulation and coding scheme (MCS) level for AMC. However, control delay in AMC and HARQ depends on TDD time slot allocation formats. Large control delay in AMC will result in false MCS selection due to the poor channel correlation between measured channel state from the received signals and instantaneous channel state of actual transmission with the MCS selected based on the measured channel state. We present an analytical approach to calculate the probability of MCS level selection error in different channel conditions for different asymmetric time slot allocations. From the theoretical and simulation results, it is shown that the instantaneous throughput per slot depends not only on maximum Doppler frequency but also on asymmetric slot allocations. Average delay time that yields error free packet reception in the downlink increases as the number of continuous downlink slots increases.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E89-A No.11 pp.3138-3147
- Publication Date
- 2006/11/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1093/ietfec/e89-a.11.3138
- Type of Manuscript
- Special Section PAPER (Special Section on Wide Band Systems)
- Category
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Nandar LYNN, Osamu TAKYU, Riaz ESMAILZADEH, Masao NAKAGAWA, "Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors" in IEICE TRANSACTIONS on Fundamentals,
vol. E89-A, no. 11, pp. 3138-3147, November 2006, doi: 10.1093/ietfec/e89-a.11.3138.
Abstract: In this paper, we evaluate the performance of asymmetric Time Division Duplex (TDD) system that employs Adaptive Modulation and Coding (AMC) and Hybrid ARQ, with consideration of the effect of control delays in TDD. Channel reciprocity characteristic in TDD allows utilization of open loop channel estimation to choose appropriate modulation and coding scheme (MCS) level for AMC. However, control delay in AMC and HARQ depends on TDD time slot allocation formats. Large control delay in AMC will result in false MCS selection due to the poor channel correlation between measured channel state from the received signals and instantaneous channel state of actual transmission with the MCS selected based on the measured channel state. We present an analytical approach to calculate the probability of MCS level selection error in different channel conditions for different asymmetric time slot allocations. From the theoretical and simulation results, it is shown that the instantaneous throughput per slot depends not only on maximum Doppler frequency but also on asymmetric slot allocations. Average delay time that yields error free packet reception in the downlink increases as the number of continuous downlink slots increases.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e89-a.11.3138/_p
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@ARTICLE{e89-a_11_3138,
author={Nandar LYNN, Osamu TAKYU, Riaz ESMAILZADEH, Masao NAKAGAWA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors},
year={2006},
volume={E89-A},
number={11},
pages={3138-3147},
abstract={In this paper, we evaluate the performance of asymmetric Time Division Duplex (TDD) system that employs Adaptive Modulation and Coding (AMC) and Hybrid ARQ, with consideration of the effect of control delays in TDD. Channel reciprocity characteristic in TDD allows utilization of open loop channel estimation to choose appropriate modulation and coding scheme (MCS) level for AMC. However, control delay in AMC and HARQ depends on TDD time slot allocation formats. Large control delay in AMC will result in false MCS selection due to the poor channel correlation between measured channel state from the received signals and instantaneous channel state of actual transmission with the MCS selected based on the measured channel state. We present an analytical approach to calculate the probability of MCS level selection error in different channel conditions for different asymmetric time slot allocations. From the theoretical and simulation results, it is shown that the instantaneous throughput per slot depends not only on maximum Doppler frequency but also on asymmetric slot allocations. Average delay time that yields error free packet reception in the downlink increases as the number of continuous downlink slots increases.},
keywords={},
doi={10.1093/ietfec/e89-a.11.3138},
ISSN={1745-1337},
month={November},}
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TY - JOUR
TI - Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3138
EP - 3147
AU - Nandar LYNN
AU - Osamu TAKYU
AU - Riaz ESMAILZADEH
AU - Masao NAKAGAWA
PY - 2006
DO - 10.1093/ietfec/e89-a.11.3138
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E89-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2006
AB - In this paper, we evaluate the performance of asymmetric Time Division Duplex (TDD) system that employs Adaptive Modulation and Coding (AMC) and Hybrid ARQ, with consideration of the effect of control delays in TDD. Channel reciprocity characteristic in TDD allows utilization of open loop channel estimation to choose appropriate modulation and coding scheme (MCS) level for AMC. However, control delay in AMC and HARQ depends on TDD time slot allocation formats. Large control delay in AMC will result in false MCS selection due to the poor channel correlation between measured channel state from the received signals and instantaneous channel state of actual transmission with the MCS selected based on the measured channel state. We present an analytical approach to calculate the probability of MCS level selection error in different channel conditions for different asymmetric time slot allocations. From the theoretical and simulation results, it is shown that the instantaneous throughput per slot depends not only on maximum Doppler frequency but also on asymmetric slot allocations. Average delay time that yields error free packet reception in the downlink increases as the number of continuous downlink slots increases.
ER -
English
