Smart Antennas for Multiuser DS/CDMA Communications in Multipath Fading Channels

Fang-Biau UENG; Jun-Da CHEN; Sheng-Han CHENG

doi:10.1093/ietcom/e88-b.7.2944

Smart Antennas for Multiuser DS/CDMA Communications in Multipath Fading Channels

Fang-Biau UENG, Jun-Da CHEN, Sheng-Han CHENG

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Smart antennas, with spatial processing, used in code division multiple access (CDMA) multiuser communications can enhance range, reliability and capacity. Moreover, the adaptive beamforming technologies can remove unwanted noise and interference from the received signal. In this paper, we propose four adaptive antenna receiver structures for direct-sequence (DS) CDMA multiuser environment with multipath fading channels. Narrowband and wideband adaptive array receiver structures are considered in this paper. LMS and RLS algorithms are employed in both narrowband and wideband receiver structures to adjust the spreading code coefficients. We call these new schemes as Wiener code filters. The weights of the adaptive beamformer and the spreading code are updated every symbol interval, so the computational complexity is very low. Simulation examples are given to compare the performances of the proposed receiver structures. Analyses are also given for these structures.

Publication: IEICE TRANSACTIONS on Communications Vol.E88-B No.7 pp.2944-2954

Publication Date: 2005/07/01

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DOI: 10.1093/ietcom/e88-b.7.2944

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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Fang-Biau UENG, Jun-Da CHEN, Sheng-Han CHENG, "Smart Antennas for Multiuser DS/CDMA Communications in Multipath Fading Channels" in IEICE TRANSACTIONS on Communications, vol. E88-B, no. 7, pp. 2944-2954, July 2005, doi: 10.1093/ietcom/e88-b.7.2944.
Abstract: Smart antennas, with spatial processing, used in code division multiple access (CDMA) multiuser communications can enhance range, reliability and capacity. Moreover, the adaptive beamforming technologies can remove unwanted noise and interference from the received signal. In this paper, we propose four adaptive antenna receiver structures for direct-sequence (DS) CDMA multiuser environment with multipath fading channels. Narrowband and wideband adaptive array receiver structures are considered in this paper. LMS and RLS algorithms are employed in both narrowband and wideband receiver structures to adjust the spreading code coefficients. We call these new schemes as Wiener code filters. The weights of the adaptive beamformer and the spreading code are updated every symbol interval, so the computational complexity is very low. Simulation examples are given to compare the performances of the proposed receiver structures. Analyses are also given for these structures.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e88-b.7.2944/_p

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@ARTICLE{e88-b_7_2944,
author={Fang-Biau UENG, Jun-Da CHEN, Sheng-Han CHENG, },
journal={IEICE TRANSACTIONS on Communications},
title={Smart Antennas for Multiuser DS/CDMA Communications in Multipath Fading Channels},
year={2005},
volume={E88-B},
number={7},
pages={2944-2954},
abstract={Smart antennas, with spatial processing, used in code division multiple access (CDMA) multiuser communications can enhance range, reliability and capacity. Moreover, the adaptive beamforming technologies can remove unwanted noise and interference from the received signal. In this paper, we propose four adaptive antenna receiver structures for direct-sequence (DS) CDMA multiuser environment with multipath fading channels. Narrowband and wideband adaptive array receiver structures are considered in this paper. LMS and RLS algorithms are employed in both narrowband and wideband receiver structures to adjust the spreading code coefficients. We call these new schemes as Wiener code filters. The weights of the adaptive beamformer and the spreading code are updated every symbol interval, so the computational complexity is very low. Simulation examples are given to compare the performances of the proposed receiver structures. Analyses are also given for these structures.},
keywords={},
doi={10.1093/ietcom/e88-b.7.2944},
ISSN={},
month={July},}

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TY - JOUR
TI - Smart Antennas for Multiuser DS/CDMA Communications in Multipath Fading Channels
T2 - IEICE TRANSACTIONS on Communications
SP - 2944
EP - 2954
AU - Fang-Biau UENG
AU - Jun-Da CHEN
AU - Sheng-Han CHENG
PY - 2005
DO - 10.1093/ietcom/e88-b.7.2944
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E88-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2005
AB - Smart antennas, with spatial processing, used in code division multiple access (CDMA) multiuser communications can enhance range, reliability and capacity. Moreover, the adaptive beamforming technologies can remove unwanted noise and interference from the received signal. In this paper, we propose four adaptive antenna receiver structures for direct-sequence (DS) CDMA multiuser environment with multipath fading channels. Narrowband and wideband adaptive array receiver structures are considered in this paper. LMS and RLS algorithms are employed in both narrowband and wideband receiver structures to adjust the spreading code coefficients. We call these new schemes as Wiener code filters. The weights of the adaptive beamformer and the spreading code are updated every symbol interval, so the computational complexity is very low. Simulation examples are given to compare the performances of the proposed receiver structures. Analyses are also given for these structures.
ER -