An interference avoidance code assignment strategy for downlink multi-rate MC-DS-CDMA with TF-domain spreading

Li Chun Wang, Chih-Wen Chang, Howard Huang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Frequency selective fading may affect the orthogonality of the spreading codes in the multi-carrier direct sequence code division multiple access (MC-DS-CDMA) systems. In this paper, we define a new performance metric called the multiple access interference (MAI) coefficient for the MC-DS-CDMA system to quantitatively predict the impact of inter-code interference with the time- and frequency-domain spreading in a frequency selective fading channel. With the help of MAI coefficient, a novel interference avoidance code assignment strategy is proposed. By jointly considering the incurred MAI effect and the blocking probability in the code tree structure, the proposed interference avoidance code assignment method can effectively reduce the MAI for the multi-rate MC-DS-CDMA system, while maintaining very good call blocking rate performance.

Original languageEnglish
Pages (from-to)2508-2518
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume6
Issue number7
DOIs
Publication statusPublished - 2007 Jul 1

Fingerprint

Multiple access interference
Multicarrier
Code Division multiple Access
Multiple Access Interference
Code division multiple access
Assignment
Interference
Frequency selective fading
Blocking probability
Blocking Probability
Fading channels
Performance Metrics
Coefficient
Tree Structure
Fading Channels
Fading
Orthogonality
Frequency Domain
Time Domain
Strategy

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

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An interference avoidance code assignment strategy for downlink multi-rate MC-DS-CDMA with TF-domain spreading. / Wang, Li Chun; Chang, Chih-Wen; Huang, Howard.

In: IEEE Transactions on Wireless Communications, Vol. 6, No. 7, 01.07.2007, p. 2508-2518.

Research output: Contribution to journalArticle

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