An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control

Chih Wen Chang, Chien Cheng Kuo

研究成果: Conference contribution

1 引文 (Scopus)

摘要

In this paper, we explore the potential of developing an interweave cognitive radio (CR) system based on a hierarchical wide-band two-dimensional spread multi-carrier directedsequenced code division multiple access (MC-DS-CDMA). First, a small CR cell is embedded in a large primary cell such that the spatial separation gives a chance to share the spreading code resources with the primary system. Second, the white, gray and black spreading codes are defined to facilitate the management of the spreading code resources. Also, a new multiple access interference (MAI) coefficient is derived to quantize the amount of intra- and inter-system interference. Third, based on the MAI coefficient, a dynamic spectrum access (DSA) algorithm, including the code assignment/reassignment, transmission power control and call admission control mechanisms, is proposed to efficiently utilize the white and gray spreading codes without damaging the primary system. The simulation results show that compared with the the case of using only the white spreading codes, some extra 53% increase in call admissions and 13% decrease in call droppings can be attained by using the gray spreading codes properly.

原文English
主出版物標題2010 IEEE 71st Vehicular Technology
DOIs
出版狀態Published - 2010 七月 30
事件2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan
持續時間: 2010 五月 162010 五月 19

出版系列

名字IEEE Vehicular Technology Conference
ISSN(列印)1550-2252

Other

Other2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring
國家Taiwan
城市Taipei
期間10-05-1610-05-19

指紋

Multiple access interference
Multicarrier
Radio systems
Cognitive Radio
Power Control
Code Division multiple Access
Cognitive radio
Power control
Code division multiple access
Congestion control (communication)
Multiple Access Interference
Dynamic Spectrum Access
Call Admission Control
Resources
Cell
Coefficient
Assignment
Interference
Decrease

All Science Journal Classification (ASJC) codes

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

引用此文

Chang, C. W., & Kuo, C. C. (2010). An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control. 於 2010 IEEE 71st Vehicular Technology [5494032] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECS.2010.5494032
Chang, Chih Wen ; Kuo, Chien Cheng. / An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control. 2010 IEEE 71st Vehicular Technology. 2010. (IEEE Vehicular Technology Conference).
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abstract = "In this paper, we explore the potential of developing an interweave cognitive radio (CR) system based on a hierarchical wide-band two-dimensional spread multi-carrier directedsequenced code division multiple access (MC-DS-CDMA). First, a small CR cell is embedded in a large primary cell such that the spatial separation gives a chance to share the spreading code resources with the primary system. Second, the white, gray and black spreading codes are defined to facilitate the management of the spreading code resources. Also, a new multiple access interference (MAI) coefficient is derived to quantize the amount of intra- and inter-system interference. Third, based on the MAI coefficient, a dynamic spectrum access (DSA) algorithm, including the code assignment/reassignment, transmission power control and call admission control mechanisms, is proposed to efficiently utilize the white and gray spreading codes without damaging the primary system. The simulation results show that compared with the the case of using only the white spreading codes, some extra 53{\%} increase in call admissions and 13{\%} decrease in call droppings can be attained by using the gray spreading codes properly.",
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Chang, CW & Kuo, CC 2010, An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control. 於 2010 IEEE 71st Vehicular Technology., 5494032, IEEE Vehicular Technology Conference, 2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring, Taipei, Taiwan, 10-05-16. https://doi.org/10.1109/VETECS.2010.5494032

An interweave cognitive radio system based on the hierarchical 2D-spread MC-DS-CDMA with transmission power control. / Chang, Chih Wen; Kuo, Chien Cheng.

2010 IEEE 71st Vehicular Technology. 2010. 5494032 (IEEE Vehicular Technology Conference).

研究成果: Conference contribution

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