Effects of subcarrier power allocation on an interference avoidance code assignment strategy for multirate MC-DS-CDMA systems

Chih-Wen Chang, Li Chun Wang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multirate multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) system with time- and frequency-domain spreadings. Based on the newly defined metric multiple-access interference (MAI) coefficient, the proposed code assignment strategy can quantitatively predict the incurred MAI before assigning a spreading code. The SPA mechanism aims to maximize the received signal power. In addition to lowering the MAI, the proposed code assignment strategy further considers the compactness of the assigned codes in the entire 2-D tree structure. The simulation results show that the proposed joint SPA and code assignment strategy not only can reach a better received signal quality but can also achieve a high call admission rate.

Original languageEnglish
Pages (from-to)1513-1526
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Volume57
Issue number3
DOIs
Publication statusPublished - 2008 May 1

Fingerprint

Subcarrier Allocation
Multiple access interference
Multicarrier
Power Allocation
Code Division multiple Access
Code division multiple access
Assignment
Interference
Multiple Access Interference
Tree Structure
Frequency Domain
Compactness
Strategy
Time Domain
Maximise
Entire
Metric
Predict
Coefficient

All Science Journal Classification (ASJC) codes

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

Cite this

@article{e95aa264f56b41589b8beb1e259895c8,
title = "Effects of subcarrier power allocation on an interference avoidance code assignment strategy for multirate MC-DS-CDMA systems",
abstract = "In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multirate multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) system with time- and frequency-domain spreadings. Based on the newly defined metric multiple-access interference (MAI) coefficient, the proposed code assignment strategy can quantitatively predict the incurred MAI before assigning a spreading code. The SPA mechanism aims to maximize the received signal power. In addition to lowering the MAI, the proposed code assignment strategy further considers the compactness of the assigned codes in the entire 2-D tree structure. The simulation results show that the proposed joint SPA and code assignment strategy not only can reach a better received signal quality but can also achieve a high call admission rate.",
author = "Chih-Wen Chang and Wang, {Li Chun}",
year = "2008",
month = "5",
day = "1",
doi = "10.1109/TVT.2007.909300",
language = "English",
volume = "57",
pages = "1513--1526",
journal = "IEEE Transactions on Vehicular Technology",
issn = "0018-9545",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Effects of subcarrier power allocation on an interference avoidance code assignment strategy for multirate MC-DS-CDMA systems

AU - Chang, Chih-Wen

AU - Wang, Li Chun

PY - 2008/5/1

Y1 - 2008/5/1

N2 - In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multirate multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) system with time- and frequency-domain spreadings. Based on the newly defined metric multiple-access interference (MAI) coefficient, the proposed code assignment strategy can quantitatively predict the incurred MAI before assigning a spreading code. The SPA mechanism aims to maximize the received signal power. In addition to lowering the MAI, the proposed code assignment strategy further considers the compactness of the assigned codes in the entire 2-D tree structure. The simulation results show that the proposed joint SPA and code assignment strategy not only can reach a better received signal quality but can also achieve a high call admission rate.

AB - In this paper, we propose a joint subcarrier power allocation (SPA) and code assignment scheme for the synchronous multirate multicarrier direct-sequence code-division multiple-access (MC-DS-CDMA) system with time- and frequency-domain spreadings. Based on the newly defined metric multiple-access interference (MAI) coefficient, the proposed code assignment strategy can quantitatively predict the incurred MAI before assigning a spreading code. The SPA mechanism aims to maximize the received signal power. In addition to lowering the MAI, the proposed code assignment strategy further considers the compactness of the assigned codes in the entire 2-D tree structure. The simulation results show that the proposed joint SPA and code assignment strategy not only can reach a better received signal quality but can also achieve a high call admission rate.

UR - http://www.scopus.com/inward/record.url?scp=44849136514&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=44849136514&partnerID=8YFLogxK

U2 - 10.1109/TVT.2007.909300

DO - 10.1109/TVT.2007.909300

M3 - Article

VL - 57

SP - 1513

EP - 1526

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

SN - 0018-9545

IS - 3

ER -