A novel interference-avoidance code reassignment for downlink two-dimensional-spread MC-DS-CDMA systems with power control

Chih-Wen Chang, Chien Cheng Kuo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the 2-D time- and frequency-domain spread multicarrier direct-sequenced code-division multiple-access (MC-DS-CDMA) system, maintaining a good code tree structure is the key to controlling the interference level. However, as users come and go, the code tree structure will be fragmented and steeped in a high level of interference. In this situation, an active call may be dropped for not being able to reach a predefined signal quality. To solve this call-dropping problem, we propose a novel code-reassignment strategy to reallocate a low-interferenced code to the could-be-dropped call. This way, not only can this possible call-dropping event be evaded, but also, a low-interferenced 2-D code tree structure can be maintained. The simulation results show that the proposed code-reassignment method can efficiently alleviate the call-dropping problem and boost the call-survival rate simultaneously. It is believed that the proposed scheme fills up an important missing link of the dynamic call-resource management for the 2-D-spread MC-DS-CDMA system.

Original languageEnglish
Article number5443643
Pages (from-to)3104-3108
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Volume59
Issue number6
DOIs
Publication statusPublished - 2010 Jul 1

Fingerprint

Multicarrier
Power Control
Code Division multiple Access
Power control
Code division multiple access
Interference
Tree Structure
Resource Management
Frequency Domain
Time Domain
Simulation

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

@article{a997a668009e4621855be350a6ef0ff6,
title = "A novel interference-avoidance code reassignment for downlink two-dimensional-spread MC-DS-CDMA systems with power control",
abstract = "In the 2-D time- and frequency-domain spread multicarrier direct-sequenced code-division multiple-access (MC-DS-CDMA) system, maintaining a good code tree structure is the key to controlling the interference level. However, as users come and go, the code tree structure will be fragmented and steeped in a high level of interference. In this situation, an active call may be dropped for not being able to reach a predefined signal quality. To solve this call-dropping problem, we propose a novel code-reassignment strategy to reallocate a low-interferenced code to the could-be-dropped call. This way, not only can this possible call-dropping event be evaded, but also, a low-interferenced 2-D code tree structure can be maintained. The simulation results show that the proposed code-reassignment method can efficiently alleviate the call-dropping problem and boost the call-survival rate simultaneously. It is believed that the proposed scheme fills up an important missing link of the dynamic call-resource management for the 2-D-spread MC-DS-CDMA system.",
author = "Chih-Wen Chang and Kuo, {Chien Cheng}",
year = "2010",
month = "7",
day = "1",
doi = "10.1109/TVT.2010.2047329",
language = "English",
volume = "59",
pages = "3104--3108",
journal = "IEEE Transactions on Vehicular Technology",
issn = "0018-9545",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "6",

}

A novel interference-avoidance code reassignment for downlink two-dimensional-spread MC-DS-CDMA systems with power control. / Chang, Chih-Wen; Kuo, Chien Cheng.

In: IEEE Transactions on Vehicular Technology, Vol. 59, No. 6, 5443643, 01.07.2010, p. 3104-3108.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A novel interference-avoidance code reassignment for downlink two-dimensional-spread MC-DS-CDMA systems with power control

AU - Chang, Chih-Wen

AU - Kuo, Chien Cheng

PY - 2010/7/1

Y1 - 2010/7/1

N2 - In the 2-D time- and frequency-domain spread multicarrier direct-sequenced code-division multiple-access (MC-DS-CDMA) system, maintaining a good code tree structure is the key to controlling the interference level. However, as users come and go, the code tree structure will be fragmented and steeped in a high level of interference. In this situation, an active call may be dropped for not being able to reach a predefined signal quality. To solve this call-dropping problem, we propose a novel code-reassignment strategy to reallocate a low-interferenced code to the could-be-dropped call. This way, not only can this possible call-dropping event be evaded, but also, a low-interferenced 2-D code tree structure can be maintained. The simulation results show that the proposed code-reassignment method can efficiently alleviate the call-dropping problem and boost the call-survival rate simultaneously. It is believed that the proposed scheme fills up an important missing link of the dynamic call-resource management for the 2-D-spread MC-DS-CDMA system.

AB - In the 2-D time- and frequency-domain spread multicarrier direct-sequenced code-division multiple-access (MC-DS-CDMA) system, maintaining a good code tree structure is the key to controlling the interference level. However, as users come and go, the code tree structure will be fragmented and steeped in a high level of interference. In this situation, an active call may be dropped for not being able to reach a predefined signal quality. To solve this call-dropping problem, we propose a novel code-reassignment strategy to reallocate a low-interferenced code to the could-be-dropped call. This way, not only can this possible call-dropping event be evaded, but also, a low-interferenced 2-D code tree structure can be maintained. The simulation results show that the proposed code-reassignment method can efficiently alleviate the call-dropping problem and boost the call-survival rate simultaneously. It is believed that the proposed scheme fills up an important missing link of the dynamic call-resource management for the 2-D-spread MC-DS-CDMA system.

UR - http://www.scopus.com/inward/record.url?scp=77954616099&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954616099&partnerID=8YFLogxK

U2 - 10.1109/TVT.2010.2047329

DO - 10.1109/TVT.2010.2047329

M3 - Article

VL - 59

SP - 3104

EP - 3108

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

SN - 0018-9545

IS - 6

M1 - 5443643

ER -