Performance Analysis of Forward Link DS-CDMA Systems Using Random and Orthogonal Spreading Sequences

Ji-Woong CHOI; Yong-Hwan LEE

Performance Analysis of Forward Link DS-CDMA Systems Using Random and Orthogonal Spreading Sequences

Ji-Woong CHOI, Yong-Hwan LEE

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The characteristics of the spreading sequence significantly affect the signal-to-interference power ratio (SIR) of the received signal in direct sequence code division multiple access (DS-CDMA) system. In this paper, we analyze the receiver performance of the forward link of a DS-CDMA system in terms of the SIR and bit error rate (BER) when pseudo noise (PN) codes and concatenated orthogonal/PN (OPN) codes are used as the spreading sequence. The use of OPN spreading codes can cancel out the intra-cell interference signals with equal path delay, but the use of PN spreading codes cannot, significantly degrading the performance. As a result, the BER performance of the OPN spreading system is better than that of the PN spreading system. The use of OPN spreading sequences can provide the system capacity at least two times larger than the use of PN spreading sequences in the single-cell environment even when the channel has a large number of multipaths. The two spreading systems also show significant difference in the user capacity even in a multi-cell environment.

Publication: IEICE TRANSACTIONS on Communications Vol.E87-B No.8 pp.2195-2202

Publication Date: 2004/08/01

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Type of Manuscript: PAPER

Category: Wireless Communication Technology

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Ji-Woong CHOI, Yong-Hwan LEE, "Performance Analysis of Forward Link DS-CDMA Systems Using Random and Orthogonal Spreading Sequences" in IEICE TRANSACTIONS on Communications, vol. E87-B, no. 8, pp. 2195-2202, August 2004, doi: .
Abstract: The characteristics of the spreading sequence significantly affect the signal-to-interference power ratio (SIR) of the received signal in direct sequence code division multiple access (DS-CDMA) system. In this paper, we analyze the receiver performance of the forward link of a DS-CDMA system in terms of the SIR and bit error rate (BER) when pseudo noise (PN) codes and concatenated orthogonal/PN (OPN) codes are used as the spreading sequence. The use of OPN spreading codes can cancel out the intra-cell interference signals with equal path delay, but the use of PN spreading codes cannot, significantly degrading the performance. As a result, the BER performance of the OPN spreading system is better than that of the PN spreading system. The use of OPN spreading sequences can provide the system capacity at least two times larger than the use of PN spreading sequences in the single-cell environment even when the channel has a large number of multipaths. The two spreading systems also show significant difference in the user capacity even in a multi-cell environment.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/e87-b_8_2195/_p

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@ARTICLE{e87-b_8_2195,
author={Ji-Woong CHOI, Yong-Hwan LEE, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Analysis of Forward Link DS-CDMA Systems Using Random and Orthogonal Spreading Sequences},
year={2004},
volume={E87-B},
number={8},
pages={2195-2202},
abstract={The characteristics of the spreading sequence significantly affect the signal-to-interference power ratio (SIR) of the received signal in direct sequence code division multiple access (DS-CDMA) system. In this paper, we analyze the receiver performance of the forward link of a DS-CDMA system in terms of the SIR and bit error rate (BER) when pseudo noise (PN) codes and concatenated orthogonal/PN (OPN) codes are used as the spreading sequence. The use of OPN spreading codes can cancel out the intra-cell interference signals with equal path delay, but the use of PN spreading codes cannot, significantly degrading the performance. As a result, the BER performance of the OPN spreading system is better than that of the PN spreading system. The use of OPN spreading sequences can provide the system capacity at least two times larger than the use of PN spreading sequences in the single-cell environment even when the channel has a large number of multipaths. The two spreading systems also show significant difference in the user capacity even in a multi-cell environment.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - Performance Analysis of Forward Link DS-CDMA Systems Using Random and Orthogonal Spreading Sequences
T2 - IEICE TRANSACTIONS on Communications
SP - 2195
EP - 2202
AU - Ji-Woong CHOI
AU - Yong-Hwan LEE
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E87-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2004
AB - The characteristics of the spreading sequence significantly affect the signal-to-interference power ratio (SIR) of the received signal in direct sequence code division multiple access (DS-CDMA) system. In this paper, we analyze the receiver performance of the forward link of a DS-CDMA system in terms of the SIR and bit error rate (BER) when pseudo noise (PN) codes and concatenated orthogonal/PN (OPN) codes are used as the spreading sequence. The use of OPN spreading codes can cancel out the intra-cell interference signals with equal path delay, but the use of PN spreading codes cannot, significantly degrading the performance. As a result, the BER performance of the OPN spreading system is better than that of the PN spreading system. The use of OPN spreading sequences can provide the system capacity at least two times larger than the use of PN spreading sequences in the single-cell environment even when the channel has a large number of multipaths. The two spreading systems also show significant difference in the user capacity even in a multi-cell environment.
ER -