Performance of DS-CDMA Adaptive Modulation System in a Multipath-Channel Environment

Kazuaki TSUKAKOSHI; Toshiya KOBASHI; Yukiyoshi KAMIO

Performance of DS-CDMA Adaptive Modulation System in a Multipath-Channel Environment

Kazuaki TSUKAKOSHI, Toshiya KOBASHI, Yukiyoshi KAMIO

Full Text Views

0

Cite this

Summary :

We describe a DS-CDMA adaptive modulation system in which high-rate-data for moving pictures and LANs is transmitted to a high-speed traveling mobile terminal in the down-link. The transmission data rate is constant by changing the data-modulation level and the number of multiplex channels. We use computer simulation to evaluate the performance of the system using a RAKE receiver in a multipath-channel environment. For f_dT_slot 0.08, which is fading maximum Doppler frequency f_d normalized by slot time T_slot, the following results are obtained. The average bit error rate (BER) of BER 1 10^-3 necessary to ensure quality of high-rate-data transmission for moving pictures and LANs without error correction is attainable at low symbol-to-noise power ratio of E_S/N₀ 14 dB and channel-use rate lower than 65%. The cell capacity of 17.2% is about 1.4 times that of the conventional system. Also, f_dT_slot=0.08 corresponds to the traveling speed of about 250 km/h at a carrier frequency of 8 GHz. Thus, the system enables high-rate-data and high-quality transmission needed for the moving pictures and LANs at mobile terminals with a traveling speed higher than 100 km/h at high carrier frequencies of the microwave band.

Publication: IEICE TRANSACTIONS on Communications Vol.E86-B No.2 pp.743-756

Publication Date: 2003/02/01

Publicized

Online ISSN

DOI

Type of Manuscript: PAPER

Category: Wireless Communication Technology

Cite this

Copy

Kazuaki TSUKAKOSHI, Toshiya KOBASHI, Yukiyoshi KAMIO, "Performance of DS-CDMA Adaptive Modulation System in a Multipath-Channel Environment" in IEICE TRANSACTIONS on Communications, vol. E86-B, no. 2, pp. 743-756, February 2003, doi: .
Abstract: We describe a DS-CDMA adaptive modulation system in which high-rate-data for moving pictures and LANs is transmitted to a high-speed traveling mobile terminal in the down-link. The transmission data rate is constant by changing the data-modulation level and the number of multiplex channels. We use computer simulation to evaluate the performance of the system using a RAKE receiver in a multipath-channel environment. For f_dT_slot 0.08, which is fading maximum Doppler frequency f_d normalized by slot time T_slot, the following results are obtained. The average bit error rate (BER) of BER 1 10^-3 necessary to ensure quality of high-rate-data transmission for moving pictures and LANs without error correction is attainable at low symbol-to-noise power ratio of E_S/N₀ 14 dB and channel-use rate lower than 65%. The cell capacity of 17.2% is about 1.4 times that of the conventional system. Also, f_dT_slot=0.08 corresponds to the traveling speed of about 250 km/h at a carrier frequency of 8 GHz. Thus, the system enables high-rate-data and high-quality transmission needed for the moving pictures and LANs at mobile terminals with a traveling speed higher than 100 km/h at high carrier frequencies of the microwave band.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e86-b_2_743/_p

Copy

@ARTICLE{e86-b_2_743,
author={Kazuaki TSUKAKOSHI, Toshiya KOBASHI, Yukiyoshi KAMIO, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance of DS-CDMA Adaptive Modulation System in a Multipath-Channel Environment},
year={2003},
volume={E86-B},
number={2},
pages={743-756},
abstract={We describe a DS-CDMA adaptive modulation system in which high-rate-data for moving pictures and LANs is transmitted to a high-speed traveling mobile terminal in the down-link. The transmission data rate is constant by changing the data-modulation level and the number of multiplex channels. We use computer simulation to evaluate the performance of the system using a RAKE receiver in a multipath-channel environment. For f_dT_slot 0.08, which is fading maximum Doppler frequency f_d normalized by slot time T_slot, the following results are obtained. The average bit error rate (BER) of BER 1 10^-3 necessary to ensure quality of high-rate-data transmission for moving pictures and LANs without error correction is attainable at low symbol-to-noise power ratio of E_S/N₀ 14 dB and channel-use rate lower than 65%. The cell capacity of 17.2% is about 1.4 times that of the conventional system. Also, f_dT_slot=0.08 corresponds to the traveling speed of about 250 km/h at a carrier frequency of 8 GHz. Thus, the system enables high-rate-data and high-quality transmission needed for the moving pictures and LANs at mobile terminals with a traveling speed higher than 100 km/h at high carrier frequencies of the microwave band.},
keywords={},
doi={},
ISSN={},
month={February},}

Copy

TY - JOUR
TI - Performance of DS-CDMA Adaptive Modulation System in a Multipath-Channel Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 743
EP - 756
AU - Kazuaki TSUKAKOSHI
AU - Toshiya KOBASHI
AU - Yukiyoshi KAMIO
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E86-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2003
AB - We describe a DS-CDMA adaptive modulation system in which high-rate-data for moving pictures and LANs is transmitted to a high-speed traveling mobile terminal in the down-link. The transmission data rate is constant by changing the data-modulation level and the number of multiplex channels. We use computer simulation to evaluate the performance of the system using a RAKE receiver in a multipath-channel environment. For f_dT_slot 0.08, which is fading maximum Doppler frequency f_d normalized by slot time T_slot, the following results are obtained. The average bit error rate (BER) of BER 1 10^-3 necessary to ensure quality of high-rate-data transmission for moving pictures and LANs without error correction is attainable at low symbol-to-noise power ratio of E_S/N₀ 14 dB and channel-use rate lower than 65%. The cell capacity of 17.2% is about 1.4 times that of the conventional system. Also, f_dT_slot=0.08 corresponds to the traveling speed of about 250 km/h at a carrier frequency of 8 GHz. Thus, the system enables high-rate-data and high-quality transmission needed for the moving pictures and LANs at mobile terminals with a traveling speed higher than 100 km/h at high carrier frequencies of the microwave band.
ER -