Recently, complex orthogonal variable spreading factor (OVSF) codes based on polyphase orthogonal codes have been proposed to support multi-user/multi-rate data transmission services in synchronous direct-sequence code-division multiple access (DS-CDMA) systems. This study investigates the low signal-envelope fluctuation property of the complex OVSF codes in terms of transmission signal trajectories. In addition, a new method is proposed to suppress the envelope fluctuation more strongly at the expense of reducing the number of spreading sequences of the codes.
Tomoko K. MATSUSHIMA
Yokohama College of Commerce
Shoichiro YAMASAKI
Hiroshima City University
Hirokazu TANAKA
Hiroshima City University
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copy
Tomoko K. MATSUSHIMA, Shoichiro YAMASAKI, Hirokazu TANAKA, "Orthogonal Variable Spreading Factor Codes Suppressing Signal-Envelope Fluctuation" in IEICE TRANSACTIONS on Fundamentals,
vol. E106-A, no. 3, pp. 445-449, March 2023, doi: 10.1587/transfun.2022TAL0003.
Abstract: Recently, complex orthogonal variable spreading factor (OVSF) codes based on polyphase orthogonal codes have been proposed to support multi-user/multi-rate data transmission services in synchronous direct-sequence code-division multiple access (DS-CDMA) systems. This study investigates the low signal-envelope fluctuation property of the complex OVSF codes in terms of transmission signal trajectories. In addition, a new method is proposed to suppress the envelope fluctuation more strongly at the expense of reducing the number of spreading sequences of the codes.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2022TAL0003/_p
Copy
@ARTICLE{e106-a_3_445,
author={Tomoko K. MATSUSHIMA, Shoichiro YAMASAKI, Hirokazu TANAKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Orthogonal Variable Spreading Factor Codes Suppressing Signal-Envelope Fluctuation},
year={2023},
volume={E106-A},
number={3},
pages={445-449},
abstract={Recently, complex orthogonal variable spreading factor (OVSF) codes based on polyphase orthogonal codes have been proposed to support multi-user/multi-rate data transmission services in synchronous direct-sequence code-division multiple access (DS-CDMA) systems. This study investigates the low signal-envelope fluctuation property of the complex OVSF codes in terms of transmission signal trajectories. In addition, a new method is proposed to suppress the envelope fluctuation more strongly at the expense of reducing the number of spreading sequences of the codes.},
keywords={},
doi={10.1587/transfun.2022TAL0003},
ISSN={1745-1337},
month={March},}
Copy
TY - JOUR
TI - Orthogonal Variable Spreading Factor Codes Suppressing Signal-Envelope Fluctuation
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 445
EP - 449
AU - Tomoko K. MATSUSHIMA
AU - Shoichiro YAMASAKI
AU - Hirokazu TANAKA
PY - 2023
DO - 10.1587/transfun.2022TAL0003
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E106-A
IS - 3
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - March 2023
AB - Recently, complex orthogonal variable spreading factor (OVSF) codes based on polyphase orthogonal codes have been proposed to support multi-user/multi-rate data transmission services in synchronous direct-sequence code-division multiple access (DS-CDMA) systems. This study investigates the low signal-envelope fluctuation property of the complex OVSF codes in terms of transmission signal trajectories. In addition, a new method is proposed to suppress the envelope fluctuation more strongly at the expense of reducing the number of spreading sequences of the codes.
ER -