IEICE TRANSACTIONS on Communications
A New CDM Transmission Scheme with Cyclic Shifted-and- Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values
Summary :
We have developed a code-division-multiplexing (CDM) transmission scheme for future cellular communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from an M-sequence to enable seamless communication in highly mobile environments. Because the correlation characteristics of CSE codes are determined by the M-sequence, the cross-correlation values are accumulated as a result of combining transmitted signals with opposite polarities in parallel channels. The accumulated cross-correlation values significantly degrade transmission performance, especially with multi-level modulation schemes such as quadrature amplitude modulation (QAM). We thus propose a cancellation technique to eliminate the accumulated cross-correlation values. We have evaluated the transmission performance of the CDM transmission scheme with the proposed technique by computer simulation. The new scheme enables high-quality data transmission in fast-fading channels.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E87-B No.8 pp.2212-2221
- Publication Date
- 2004/08/01
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technology
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Kazuyuki SHIMEZAWA, Hiroshi HARADA, Hiroshi SHIRAI, "A New CDM Transmission Scheme with Cyclic Shifted-and- Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values" in IEICE TRANSACTIONS on Communications,
vol. E87-B, no. 8, pp. 2212-2221, August 2004, doi: .
Abstract: We have developed a code-division-multiplexing (CDM) transmission scheme for future cellular communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from an M-sequence to enable seamless communication in highly mobile environments. Because the correlation characteristics of CSE codes are determined by the M-sequence, the cross-correlation values are accumulated as a result of combining transmitted signals with opposite polarities in parallel channels. The accumulated cross-correlation values significantly degrade transmission performance, especially with multi-level modulation schemes such as quadrature amplitude modulation (QAM). We thus propose a cancellation technique to eliminate the accumulated cross-correlation values. We have evaluated the transmission performance of the CDM transmission scheme with the proposed technique by computer simulation. The new scheme enables high-quality data transmission in fast-fading channels.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e87-b_8_2212/_p
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@ARTICLE{e87-b_8_2212,
author={Kazuyuki SHIMEZAWA, Hiroshi HARADA, Hiroshi SHIRAI, },
journal={IEICE TRANSACTIONS on Communications},
title={A New CDM Transmission Scheme with Cyclic Shifted-and- Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values},
year={2004},
volume={E87-B},
number={8},
pages={2212-2221},
abstract={We have developed a code-division-multiplexing (CDM) transmission scheme for future cellular communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from an M-sequence to enable seamless communication in highly mobile environments. Because the correlation characteristics of CSE codes are determined by the M-sequence, the cross-correlation values are accumulated as a result of combining transmitted signals with opposite polarities in parallel channels. The accumulated cross-correlation values significantly degrade transmission performance, especially with multi-level modulation schemes such as quadrature amplitude modulation (QAM). We thus propose a cancellation technique to eliminate the accumulated cross-correlation values. We have evaluated the transmission performance of the CDM transmission scheme with the proposed technique by computer simulation. The new scheme enables high-quality data transmission in fast-fading channels.},
keywords={},
doi={},
ISSN={},
month={August},}
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TY - JOUR
TI - A New CDM Transmission Scheme with Cyclic Shifted-and- Extended Codes and a Cancellation Technique for Accumulated Cross-Correlation Values
T2 - IEICE TRANSACTIONS on Communications
SP - 2212
EP - 2221
AU - Kazuyuki SHIMEZAWA
AU - Hiroshi HARADA
AU - Hiroshi SHIRAI
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E87-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2004
AB - We have developed a code-division-multiplexing (CDM) transmission scheme for future cellular communication systems, which uses cyclic shifted-and-extended (CSE) codes generated from an M-sequence to enable seamless communication in highly mobile environments. Because the correlation characteristics of CSE codes are determined by the M-sequence, the cross-correlation values are accumulated as a result of combining transmitted signals with opposite polarities in parallel channels. The accumulated cross-correlation values significantly degrade transmission performance, especially with multi-level modulation schemes such as quadrature amplitude modulation (QAM). We thus propose a cancellation technique to eliminate the accumulated cross-correlation values. We have evaluated the transmission performance of the CDM transmission scheme with the proposed technique by computer simulation. The new scheme enables high-quality data transmission in fast-fading channels.
ER -
English
