An OFDM Based Adaptive Modulation Scheme Employing Variable Coding Rate

Toshiyuki NAKANISHI; Seiichi SAMPEI; Hiroshi HARADA; Norihiko MORINAGA

doi:10.1093/ietcom/e88-b.2.526

An OFDM Based Adaptive Modulation Scheme Employing Variable Coding Rate

Toshiyuki NAKANISHI, Seiichi SAMPEI, Hiroshi HARADA, Norihiko MORINAGA

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This paper proposes an OFDM based adaptive modulation scheme employing variable coding rate (VCR OFDM AMS), which selects optimum modulation and coding scheme (MCS) realized by combination of several modulation schemes and coding rates. The OFDM AMS with multilevel transmit power control (OFDM AMS/MTPC) can realize high data rate transmission in the dynamic parameter controlled-orthogonal frequency and time division multiple access (DPC-OF/TDMA). The employment of OFDM AMS/MTPC, however, makes transceiver design rather complex. To solve this problem, we propose to improve throughput performances of the OFDM AMS without employment of the MTPC. The simple OFDM AMS, however, does not fully utilize transmit power for throughput improvement because there is surplus transmit power which corresponds to power margin over required signal to interference plus noise power ratio (SINR). Thus, in order to improve transmit power efficiency for throughput increase, we reduce the required SINR gaps between adjacent MCSs by introducing many coding rates. Furthermore, this paper presents an effective bit loading algorithm when multiple coding rates as well as modulation schemes are used. Computer simulation confirms that the proposed VCR OFDM AMS gives sufficient throughput performances as an alternative to the OFDM AMS/MTPC.

Publication: IEICE TRANSACTIONS on Communications Vol.E88-B No.2 pp.526-534

Publication Date: 2005/02/01

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DOI: 10.1093/ietcom/e88-b.2.526

Type of Manuscript: Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)

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Toshiyuki NAKANISHI, Seiichi SAMPEI, Hiroshi HARADA, Norihiko MORINAGA, "An OFDM Based Adaptive Modulation Scheme Employing Variable Coding Rate" in IEICE TRANSACTIONS on Communications, vol. E88-B, no. 2, pp. 526-534, February 2005, doi: 10.1093/ietcom/e88-b.2.526.
Abstract: This paper proposes an OFDM based adaptive modulation scheme employing variable coding rate (VCR OFDM AMS), which selects optimum modulation and coding scheme (MCS) realized by combination of several modulation schemes and coding rates. The OFDM AMS with multilevel transmit power control (OFDM AMS/MTPC) can realize high data rate transmission in the dynamic parameter controlled-orthogonal frequency and time division multiple access (DPC-OF/TDMA). The employment of OFDM AMS/MTPC, however, makes transceiver design rather complex. To solve this problem, we propose to improve throughput performances of the OFDM AMS without employment of the MTPC. The simple OFDM AMS, however, does not fully utilize transmit power for throughput improvement because there is surplus transmit power which corresponds to power margin over required signal to interference plus noise power ratio (SINR). Thus, in order to improve transmit power efficiency for throughput increase, we reduce the required SINR gaps between adjacent MCSs by introducing many coding rates. Furthermore, this paper presents an effective bit loading algorithm when multiple coding rates as well as modulation schemes are used. Computer simulation confirms that the proposed VCR OFDM AMS gives sufficient throughput performances as an alternative to the OFDM AMS/MTPC.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.2.526/_p

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@ARTICLE{e88-b_2_526,
author={Toshiyuki NAKANISHI, Seiichi SAMPEI, Hiroshi HARADA, Norihiko MORINAGA, },
journal={IEICE TRANSACTIONS on Communications},
title={An OFDM Based Adaptive Modulation Scheme Employing Variable Coding Rate},
year={2005},
volume={E88-B},
number={2},
pages={526-534},
abstract={This paper proposes an OFDM based adaptive modulation scheme employing variable coding rate (VCR OFDM AMS), which selects optimum modulation and coding scheme (MCS) realized by combination of several modulation schemes and coding rates. The OFDM AMS with multilevel transmit power control (OFDM AMS/MTPC) can realize high data rate transmission in the dynamic parameter controlled-orthogonal frequency and time division multiple access (DPC-OF/TDMA). The employment of OFDM AMS/MTPC, however, makes transceiver design rather complex. To solve this problem, we propose to improve throughput performances of the OFDM AMS without employment of the MTPC. The simple OFDM AMS, however, does not fully utilize transmit power for throughput improvement because there is surplus transmit power which corresponds to power margin over required signal to interference plus noise power ratio (SINR). Thus, in order to improve transmit power efficiency for throughput increase, we reduce the required SINR gaps between adjacent MCSs by introducing many coding rates. Furthermore, this paper presents an effective bit loading algorithm when multiple coding rates as well as modulation schemes are used. Computer simulation confirms that the proposed VCR OFDM AMS gives sufficient throughput performances as an alternative to the OFDM AMS/MTPC.},
keywords={},
doi={10.1093/ietcom/e88-b.2.526},
ISSN={},
month={February},}

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TY - JOUR
TI - An OFDM Based Adaptive Modulation Scheme Employing Variable Coding Rate
T2 - IEICE TRANSACTIONS on Communications
SP - 526
EP - 534
AU - Toshiyuki NAKANISHI
AU - Seiichi SAMPEI
AU - Hiroshi HARADA
AU - Norihiko MORINAGA
PY - 2005
DO - 10.1093/ietcom/e88-b.2.526
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2005
AB - This paper proposes an OFDM based adaptive modulation scheme employing variable coding rate (VCR OFDM AMS), which selects optimum modulation and coding scheme (MCS) realized by combination of several modulation schemes and coding rates. The OFDM AMS with multilevel transmit power control (OFDM AMS/MTPC) can realize high data rate transmission in the dynamic parameter controlled-orthogonal frequency and time division multiple access (DPC-OF/TDMA). The employment of OFDM AMS/MTPC, however, makes transceiver design rather complex. To solve this problem, we propose to improve throughput performances of the OFDM AMS without employment of the MTPC. The simple OFDM AMS, however, does not fully utilize transmit power for throughput improvement because there is surplus transmit power which corresponds to power margin over required signal to interference plus noise power ratio (SINR). Thus, in order to improve transmit power efficiency for throughput increase, we reduce the required SINR gaps between adjacent MCSs by introducing many coding rates. Furthermore, this paper presents an effective bit loading algorithm when multiple coding rates as well as modulation schemes are used. Computer simulation confirms that the proposed VCR OFDM AMS gives sufficient throughput performances as an alternative to the OFDM AMS/MTPC.
ER -