Hierarchical Bit Mapping for M-QAM Packet Transmission

Mitsuru UESUGI

Hierarchical Bit Mapping for M-QAM Packet Transmission

Mitsuru UESUGI

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In this paper, a hierarchical bit mapping (HBM) scheme suitable for M-level quadrature amplitude modulation (M-QAM) packet transmission is presented. Generally, M-QAM, such as 16QAM or 64QAM, consists of multiple bits with differing bit error-rate quality. Because the packet error rate when using M-QAM is highly dependent on the performance of the "weakest" (poor quality) bits, the throughput of M-QAM packets can dramatically deteriorate especially in a multi-path environment. This paper proposes the use of a bit mapping scheme conceptually similar to hierarchical QAM to improve packet transmission throughput. For 16QAM under this scheme for example, as there are four bits in a 16QAM symbol, four independent packets can be simultaneously transmitted on each of the different bits when HBM is used. In doing so, at least two packets can be transmitted with a high probability of success even under poor transmission conditions, and under good transmission conditions, four packets can potentially be successfully transmitted. An interference cancellation (IC) method is then presented for HBM, with simulation results showing that the combination of HBM with IC results in very good performance. It was also determined that the HBM scheme can be used easily and effectively with hybrid ARQ.

Publication: IEICE TRANSACTIONS on Communications Vol.E86-B No.1 pp.154-161

Publication Date: 2003/01/01

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Type of Manuscript: Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)

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Mitsuru UESUGI, "Hierarchical Bit Mapping for M-QAM Packet Transmission" in IEICE TRANSACTIONS on Communications, vol. E86-B, no. 1, pp. 154-161, January 2003, doi: .
Abstract: In this paper, a hierarchical bit mapping (HBM) scheme suitable for M-level quadrature amplitude modulation (M-QAM) packet transmission is presented. Generally, M-QAM, such as 16QAM or 64QAM, consists of multiple bits with differing bit error-rate quality. Because the packet error rate when using M-QAM is highly dependent on the performance of the "weakest" (poor quality) bits, the throughput of M-QAM packets can dramatically deteriorate especially in a multi-path environment. This paper proposes the use of a bit mapping scheme conceptually similar to hierarchical QAM to improve packet transmission throughput. For 16QAM under this scheme for example, as there are four bits in a 16QAM symbol, four independent packets can be simultaneously transmitted on each of the different bits when HBM is used. In doing so, at least two packets can be transmitted with a high probability of success even under poor transmission conditions, and under good transmission conditions, four packets can potentially be successfully transmitted. An interference cancellation (IC) method is then presented for HBM, with simulation results showing that the combination of HBM with IC results in very good performance. It was also determined that the HBM scheme can be used easily and effectively with hybrid ARQ.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e86-b_1_154/_p

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@ARTICLE{e86-b_1_154,
author={Mitsuru UESUGI, },
journal={IEICE TRANSACTIONS on Communications},
title={Hierarchical Bit Mapping for M-QAM Packet Transmission},
year={2003},
volume={E86-B},
number={1},
pages={154-161},
abstract={In this paper, a hierarchical bit mapping (HBM) scheme suitable for M-level quadrature amplitude modulation (M-QAM) packet transmission is presented. Generally, M-QAM, such as 16QAM or 64QAM, consists of multiple bits with differing bit error-rate quality. Because the packet error rate when using M-QAM is highly dependent on the performance of the "weakest" (poor quality) bits, the throughput of M-QAM packets can dramatically deteriorate especially in a multi-path environment. This paper proposes the use of a bit mapping scheme conceptually similar to hierarchical QAM to improve packet transmission throughput. For 16QAM under this scheme for example, as there are four bits in a 16QAM symbol, four independent packets can be simultaneously transmitted on each of the different bits when HBM is used. In doing so, at least two packets can be transmitted with a high probability of success even under poor transmission conditions, and under good transmission conditions, four packets can potentially be successfully transmitted. An interference cancellation (IC) method is then presented for HBM, with simulation results showing that the combination of HBM with IC results in very good performance. It was also determined that the HBM scheme can be used easily and effectively with hybrid ARQ.},
keywords={},
doi={},
ISSN={},
month={January},}

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TY - JOUR
TI - Hierarchical Bit Mapping for M-QAM Packet Transmission
T2 - IEICE TRANSACTIONS on Communications
SP - 154
EP - 161
AU - Mitsuru UESUGI
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E86-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2003
AB - In this paper, a hierarchical bit mapping (HBM) scheme suitable for M-level quadrature amplitude modulation (M-QAM) packet transmission is presented. Generally, M-QAM, such as 16QAM or 64QAM, consists of multiple bits with differing bit error-rate quality. Because the packet error rate when using M-QAM is highly dependent on the performance of the "weakest" (poor quality) bits, the throughput of M-QAM packets can dramatically deteriorate especially in a multi-path environment. This paper proposes the use of a bit mapping scheme conceptually similar to hierarchical QAM to improve packet transmission throughput. For 16QAM under this scheme for example, as there are four bits in a 16QAM symbol, four independent packets can be simultaneously transmitted on each of the different bits when HBM is used. In doing so, at least two packets can be transmitted with a high probability of success even under poor transmission conditions, and under good transmission conditions, four packets can potentially be successfully transmitted. An interference cancellation (IC) method is then presented for HBM, with simulation results showing that the combination of HBM with IC results in very good performance. It was also determined that the HBM scheme can be used easily and effectively with hybrid ARQ.
ER -