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

*Corresponding author for this work

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)2508-2518
頁數11
期刊IEEE Transactions on Wireless Communications
6
發行號7
DOIs
出版狀態Published - 1 七月 2007

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