A Multi-Code Biorthogonal Code Keying with Constant Amplitude Coding

Myoung Jin KIM; Sung Pil KIM; Jin-Woong CHO

doi:10.1093/ietcom/e88-b.7.2928

A Multi-Code Biorthogonal Code Keying with Constant Amplitude Coding

Myoung Jin KIM, Sung Pil KIM, Jin-Woong CHO

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Orthogonal modulation provides low probability of bit error, however its bandwidth efficiency is very low. Biorthogonal code may double the bandwidth efficiency, but its required bandwidth grows exponentially with the number of input bits as in orthogonal modulation. In this paper, we propose a multi-code biorthogonal code keying (MBCK) scheme that significantly reduces the signal bandwidth with the benefit from orthogonal waveform coding maintained. The system consists of multiple waveform coding blocks, and the sum of output codewords is transmitted. A problem with MBCK is that output signal is multi-level, which requires amplifier with high linearity. So it may not be an appropriate scheme for portable unit where power efficiency is highly important. We also propose a modified MBCK scheme that guarantees constant amplitude output. The transmitter of the proposed scheme contains a redundant waveform coder whose input is generated by encoding the information bits. Adding the codewords from all constituent waveform coding blocks, the composite signal has constant amplitude. It is also shown that the redundant bits are not only used to make constant amplitude signal but also used to improve the BER performance at the receiver.

Publication: IEICE TRANSACTIONS on Communications Vol.E88-B No.7 pp.2928-2936

Publication Date: 2005/07/01

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DOI: 10.1093/ietcom/e88-b.7.2928

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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Myoung Jin KIM, Sung Pil KIM, Jin-Woong CHO, "A Multi-Code Biorthogonal Code Keying with Constant Amplitude Coding" in IEICE TRANSACTIONS on Communications, vol. E88-B, no. 7, pp. 2928-2936, July 2005, doi: 10.1093/ietcom/e88-b.7.2928.
Abstract: Orthogonal modulation provides low probability of bit error, however its bandwidth efficiency is very low. Biorthogonal code may double the bandwidth efficiency, but its required bandwidth grows exponentially with the number of input bits as in orthogonal modulation. In this paper, we propose a multi-code biorthogonal code keying (MBCK) scheme that significantly reduces the signal bandwidth with the benefit from orthogonal waveform coding maintained. The system consists of multiple waveform coding blocks, and the sum of output codewords is transmitted. A problem with MBCK is that output signal is multi-level, which requires amplifier with high linearity. So it may not be an appropriate scheme for portable unit where power efficiency is highly important. We also propose a modified MBCK scheme that guarantees constant amplitude output. The transmitter of the proposed scheme contains a redundant waveform coder whose input is generated by encoding the information bits. Adding the codewords from all constituent waveform coding blocks, the composite signal has constant amplitude. It is also shown that the redundant bits are not only used to make constant amplitude signal but also used to improve the BER performance at the receiver.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.7.2928/_p

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@ARTICLE{e88-b_7_2928,
author={Myoung Jin KIM, Sung Pil KIM, Jin-Woong CHO, },
journal={IEICE TRANSACTIONS on Communications},
title={A Multi-Code Biorthogonal Code Keying with Constant Amplitude Coding},
year={2005},
volume={E88-B},
number={7},
pages={2928-2936},
abstract={Orthogonal modulation provides low probability of bit error, however its bandwidth efficiency is very low. Biorthogonal code may double the bandwidth efficiency, but its required bandwidth grows exponentially with the number of input bits as in orthogonal modulation. In this paper, we propose a multi-code biorthogonal code keying (MBCK) scheme that significantly reduces the signal bandwidth with the benefit from orthogonal waveform coding maintained. The system consists of multiple waveform coding blocks, and the sum of output codewords is transmitted. A problem with MBCK is that output signal is multi-level, which requires amplifier with high linearity. So it may not be an appropriate scheme for portable unit where power efficiency is highly important. We also propose a modified MBCK scheme that guarantees constant amplitude output. The transmitter of the proposed scheme contains a redundant waveform coder whose input is generated by encoding the information bits. Adding the codewords from all constituent waveform coding blocks, the composite signal has constant amplitude. It is also shown that the redundant bits are not only used to make constant amplitude signal but also used to improve the BER performance at the receiver.},
keywords={},
doi={10.1093/ietcom/e88-b.7.2928},
ISSN={},
month={July},}

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TY - JOUR
TI - A Multi-Code Biorthogonal Code Keying with Constant Amplitude Coding
T2 - IEICE TRANSACTIONS on Communications
SP - 2928
EP - 2936
AU - Myoung Jin KIM
AU - Sung Pil KIM
AU - Jin-Woong CHO
PY - 2005
DO - 10.1093/ietcom/e88-b.7.2928
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2005
AB - Orthogonal modulation provides low probability of bit error, however its bandwidth efficiency is very low. Biorthogonal code may double the bandwidth efficiency, but its required bandwidth grows exponentially with the number of input bits as in orthogonal modulation. In this paper, we propose a multi-code biorthogonal code keying (MBCK) scheme that significantly reduces the signal bandwidth with the benefit from orthogonal waveform coding maintained. The system consists of multiple waveform coding blocks, and the sum of output codewords is transmitted. A problem with MBCK is that output signal is multi-level, which requires amplifier with high linearity. So it may not be an appropriate scheme for portable unit where power efficiency is highly important. We also propose a modified MBCK scheme that guarantees constant amplitude output. The transmitter of the proposed scheme contains a redundant waveform coder whose input is generated by encoding the information bits. Adding the codewords from all constituent waveform coding blocks, the composite signal has constant amplitude. It is also shown that the redundant bits are not only used to make constant amplitude signal but also used to improve the BER performance at the receiver.
ER -